NASA Surface meteorology and Solar Energy

NASA Surface meteorology and Solar Energy - Available Tables

Latitude 40.178 / Longitude -75.332 was chosen.

Geometry Information

Elevation: 175 meters
averaged from the
USGS GTOPO30
digital elevation model

	Northern boundary 41
Western boundary -76	Center Latitude 40.5 Longitude -75.5	Eastern boundary -75
	Southern boundary 40
*Show A Location Map*

Parameters for Solar Cooking:

**Monthly Averaged Insolation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	1.89	2.75	3.61	4.42	5.18	5.53	5.55	4.94	4.11	3.14	2.04	1.63

Parameter Definition

**Monthly Averaged Midday Insolation Incident On A Horizontal Surface (kW/m²)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	0.28	0.40	0.46	0.52	0.56	0.60	0.60	0.56	0.50	0.41	0.28	0.25

Parameter Definition

**Monthly Averaged Clear Sky Insolation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	3.01	4.24	5.69	6.88	7.73	7.55	7.48	6.69	5.89	4.45	3.17	2.61

Parameter Definition

**Monthly Averaged Clear Sky Days (days)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	1	1	2	2	2	2	2	2	4	4	2	2

Parameter Definition

Parameters for Sizing and Pointing of Solar Panels and for Solar Thermal Applications:

**Monthly Averaged Insolation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	1.89	2.75	3.61	4.42	5.18	5.53	5.55	4.94	4.11	3.14	2.04	1.63	3.73

**Minimum And Maximum Difference From Monthly Averaged Insolation (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Minimum	-14	-15	-11	-16	-30	-22	-14	-10	-15	-15	-20	-23
Maximum	15	19	15	15	19	16	12	13	18	21	20	17

Parameter Definition

**Monthly Averaged Diffuse Radiation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	0.79	1.07	1.53	2.01	2.35	2.49	2.39	2.09	1.66	1.20	0.87	0.71	1.60
Minimum	0.74	0.94	1.42	1.91	2.17	2.34	2.25	1.97	1.48	1.01	0.79	0.66	1.48
Maximum	0.80	1.11	1.56	2.01	2.26	2.49	2.44	2.14	1.71	1.25	0.87	0.70	1.61
22-year Average K	0.45	0.48	0.46	0.45	0.46	0.47	0.49	0.48	0.49	0.49	0.44	0.43	0.47
Minimum K	0.38	0.41	0.41	0.38	0.32	0.37	0.42	0.44	0.41	0.42	0.35	0.33	0.39
Maximum K	0.51	0.57	0.54	0.52	0.55	0.55	0.55	0.55	0.57	0.60	0.53	0.50	0.54

Parameter Definition

**Monthly Averaged Direct Normal Radiation (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	3.13	3.87	3.97	4.01	4.42	4.66	4.88	4.58	4.39	4.19	3.14	2.81	4.01

**Minimum And Maximum Difference From Monthly Averaged Direct Normal Radiation (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Minimum	-19	-15	-14	-25	-48	-34	-20	-12	-18	-14	-28	-35
Maximum	24	29	25	26	38	29	20	20	27	31	35	30

Parameter Definition

**Monthly Averaged Insolation Incident On A Horizontal Surface At Indicated GMT Times (kW/m²)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average@00	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@03	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@06	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@09	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@12	n/a	n/a	n/a	0.15	0.22	0.23	0.22	0.17	0.13	n/a	n/a	n/a
Average@15	0.23	0.30	0.39	0.47	0.53	0.55	0.56	0.52	0.46	0.39	0.27	0.21
Average@18	0.28	0.40	0.46	0.52	0.56	0.60	0.60	0.56	0.50	0.41	0.28	0.25
Average@21	n/a	0.16	0.23	0.28	0.33	0.35	0.37	0.32	0.24	0.14	n/a	n/a

Parameter Definition

**Monthly Averaged Insolation Clearness Index (0 to 1.0)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average K	0.45	0.48	0.46	0.45	0.46	0.47	0.49	0.48	0.49	0.49	0.44	0.43	0.47
Minimum K	0.38	0.41	0.41	0.38	0.32	0.37	0.42	0.44	0.41	0.42	0.35	0.33	0.39
Maximum K	0.51	0.57	0.54	0.52	0.55	0.55	0.55	0.55	0.57	0.60	0.53	0.50	0.54

Parameter Definition

**Monthly Averaged Insolation Normalized Clearness Index (0 to 1.0)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	0.41	0.44	0.42	0.41	0.42	0.43	0.44	0.44	0.45	0.45	0.40	0.39

Parameter Definition

**Monthly Averaged Clear Sky Insolation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	3.01	4.24	5.69	6.88	7.73	7.55	7.48	6.69	5.89	4.45	3.17	2.61	5.45

Parameter Definition

**Monthly Averaged Clear Sky Insolation Clearness Index (0 to 1.0)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	0.71	0.74	0.73	0.71	0.70	0.65	0.66	0.66	0.70	0.70	0.69	0.69

Parameter Definition

**Monthly Averaged Clear Sky Insolation Normalized Clearness Index (0 to 1.0)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	0.65	0.68	0.67	0.65	0.64	0.59	0.60	0.60	0.64	0.64	0.63	0.63

Parameter Definition

**Monthly Averaged Downward Longwave Radiative Flux (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	6.20	6.30	6.76	7.37	8.13	8.86	9.22	9.07	8.50	7.67	7.07	6.44	7.64

Parameter Definition

Solar Geometry:

**Monthly Averaged Solar Noon (GMT time)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	1712	1716	1711	1702	1658	1701	1708	1706	1657	1648	1646	1654

Parameter Definition

**Monthly Averaged Daylight Hours (hours)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	9.66	10.7	11.9	13.2	14.4	14.9	14.7	13.7	12.5	11.1	10.0	9.38

Parameter Definition

**Monthly Averaged Daylight Average Of Hourly Cosine Solar Zenith Angles (dimensionless)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	0.33	0.37	0.46	0.54	0.54	0.58	0.56	0.58	0.48	0.42	0.33	0.30

Parameter Definition

**Monthly Averaged Cosine Solar Zenith Angle At Mid-Time Between Sunrise And Solar Noon (dimensionless)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	0.34	0.43	0.52	0.59	0.63	0.64	0.63	0.61	0.55	0.46	0.37	0.32

Parameter Definition

**Monthly Averaged Declination (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	-20.7	-12.3	-1.8	9.70	18.8	23.0	21.2	13.7	3.09	-8.45	-18.1	-22.8

Parameter Definition

**Monthly Averaged Sunset Hour Angle (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	71.3	79.3	88.4	98.3	106	111	109	101	92.6	82.7	73.9	69.1

Parameter Definition

**Monthly Averaged Maximum Solar Angle Relative To The Horizon (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average	29.0	37.4	48.0	59.5	68.6	72.8	71.0	63.6	52.9	41.3	31.6	26.9

Parameter Definition

**Monthly Averaged Hourly Solar Angles Relative To The Horizon (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
0000 GMT	n/a	n/a	n/a	n/a	0.84	4.23	4.07	n/a	n/a	n/a	n/a	n/a
0100 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0200 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0300 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0400 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0500 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0600 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0700 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0800 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0900 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
1000 GMT	n/a	n/a	n/a	n/a	1.57	3.91	1.58	n/a	n/a	n/a	n/a	n/a
1100 GMT	n/a	n/a	n/a	5.89	12.4	14.4	12.1	7.82	2.67	n/a	n/a	n/a
1200 GMT	n/a	0.28	8.25	17.3	23.7	25.6	23.3	19.1	14.0	8.15	1.75	n/a
1300 GMT	5.57	10.9	19.3	28.7	35.1	37.0	34.7	30.6	25.2	18.6	11.5	6.73
1400 GMT	14.5	20.6	29.6	39.5	46.4	48.4	46.1	41.7	35.6	27.9	20.0	15.0
1500 GMT	21.7	28.7	38.5	49.3	56.9	59.3	56.9	51.9	44.5	35.4	26.6	21.5
1600 GMT	26.8	34.5	45.0	56.5	65.3	68.6	66.2	59.9	50.7	40.1	30.6	25.6
1700 GMT	28.9	37.3	47.9	59.5	68.6	72.8	70.9	63.5	52.9	41.2	31.5	26.9
1800 GMT	28.0	36.4	46.5	56.8	64.8	68.8	67.9	61.0	50.2	38.5	29.1	25.0
1900 GMT	24.0	32.1	41.1	49.7	56.1	59.6	59.4	53.6	43.5	32.4	23.7	20.4
2000 GMT	17.5	25.0	32.9	40.1	45.6	48.7	48.8	43.7	34.4	24.0	16.1	13.4
2100 GMT	9.15	16.1	23.0	29.3	34.3	37.3	37.5	32.6	23.9	14.1	6.96	4.86
2200 GMT	n/a	5.95	12.1	17.9	22.8	25.9	26.0	21.2	12.7	3.36	n/a	n/a
2300 GMT	n/a	n/a	0.81	6.57	11.6	14.8	14.8	9.85	1.27	n/a	n/a	n/a

Parameter Definition

**Monthly Averaged Hourly Solar Azimuth Angles (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
0000 GMT	n/a	n/a	n/a	n/a	294	296	294	n/a	n/a	n/a	n/a	n/a
0100 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0200 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0300 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0400 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0500 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0600 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0700 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0800 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
0900 GMT	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
1000 GMT	n/a	n/a	n/a	n/a	66.5	62.8	63.1	n/a	n/a	n/a	n/a	n/a
1100 GMT	n/a	n/a	n/a	82.3	75.8	71.8	72.3	78.4	88.0	n/a	n/a	n/a
1200 GMT	n/a	106	99.5	91.9	84.8	80.5	81.2	87.8	97.8	108	115	n/a
1300 GMT	123	116	109	102	94.5	89.6	90.4	97.8	108	119	126	127
1400 GMT	134	128	121	114	106	100	101	109	121	131	137	138
1500 GMT	146	141	136	130	121	114	115	124	136	146	151	151
1600 GMT	161	157	154	151	145	138	137	146	157	164	167	166
1700 GMT	176	175	176	179	181	179	174	176	181	184	183	181
1800 GMT	192	193	198	207	216	220	214	208	205	203	200	196
1900 GMT	207	210	217	229	239	244	239	231	224	219	215	210
2000 GMT	221	225	233	244	255	259	255	247	240	233	227	223
2100 GMT	232	237	246	257	266	270	267	260	252	245	238	234
2200 GMT	n/a	248	257	267	275	279	276	270	263	255	n/a	n/a
2300 GMT	n/a	n/a	267	277	285	287	285	279	272	n/a	n/a	n/a

Parameter Definition

Parameters for Tilted Solar Panels:

**Monthly Averaged Radiation Incident On An Equator-Pointed Tilted Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE HRZ	1.89	2.75	3.61	4.42	5.18	5.53	5.55	4.94	4.11	3.14	2.04	1.63	3.73
K	0.45	0.48	0.46	0.45	0.46	0.47	0.49	0.48	0.49	0.49	0.44	0.43	0.47
Diffuse	0.79	1.07	1.53	2.01	2.35	2.49	2.39	2.09	1.66	1.20	0.87	0.71	1.60
Direct	3.13	3.87	3.97	4.01	4.42	4.66	4.88	4.58	4.39	4.19	3.14	2.81	4.01
Tilt 0	1.88	2.68	3.57	4.40	5.15	5.47	5.50	4.92	4.04	3.11	2.02	1.62	3.70
Tilt 25	2.75	3.52	4.16	4.62	5.09	5.28	5.37	5.04	4.55	3.98	2.83	2.45	4.14
Tilt 40	3.08	3.78	4.24	4.47	4.75	4.85	4.96	4.80	4.56	4.22	3.13	2.78	4.14
Tilt 55	3.24	3.84	4.11	4.11	4.19	4.20	4.32	4.33	4.33	4.25	3.26	2.96	3.93
Tilt 90	2.93	3.20	3.05	2.67	2.46	2.35	2.45	2.67	3.05	3.44	2.87	2.72	2.82
OPT	3.26	3.85	4.24	4.63	5.20	5.49	5.54	5.07	4.58	4.26	3.27	2.98	4.37
OPT ANG	61.0	52.0	38.0	22.0	11.0	6.00	8.00	17.0	33.0	49.0	58.0	63.0	34.7

Parameter Definition

**Minimum Radiation Incident On An Equator-pointed Tilted Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE MIN	1.63	2.35	3.20	3.71	3.62	4.34	4.76	4.47	3.48	2.67	1.63	1.26	3.09
K	0.38	0.41	0.41	0.38	0.32	0.37	0.42	0.44	0.41	0.42	0.35	0.33	0.39
Diffuse	0.80	1.11	1.56	2.01	2.26	2.49	2.44	2.14	1.71	1.25	0.87	0.70	1.61
Direct	2.53	3.26	3.39	2.99	2.26	3.07	3.87	4.03	3.58	3.59	2.24	1.80	3.05
Tilt 0	1.62	2.29	3.16	3.69	3.59	4.29	4.72	4.45	3.42	2.65	1.61	1.25	3.07
Tilt 25	2.26	2.89	3.61	3.83	3.54	4.15	4.61	4.54	3.77	3.26	2.12	1.74	3.36
Tilt 40	2.49	3.07	3.66	3.69	3.32	3.84	4.27	4.32	3.74	3.41	2.29	1.92	3.34
Tilt 55	2.60	3.09	3.53	3.40	2.97	3.38	3.75	3.91	3.55	3.40	2.35	2.00	3.16
Tilt 90	2.31	2.54	2.61	2.24	1.87	2.02	2.21	2.44	2.50	2.72	2.03	1.79	2.27
OPT	2.60	3.10	3.66	3.84	3.62	4.31	4.75	4.57	3.78	3.43	2.35	2.00	3.50
OPT ANG	59.0	49.0	36.0	20.0	9.00	5.00	8.00	16.0	30.0	46.0	55.0	59.0	32.5

Parameter Definition

**Maximum Radiation Incident On An Equator-pointed Tilted Surface (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE MAX	2.17	3.28	4.16	5.07	6.17	6.41	6.24	5.57	4.83	3.80	2.45	1.90	4.34
K	0.51	0.57	0.54	0.52	0.55	0.55	0.55	0.55	0.57	0.60	0.53	0.50	0.54
Diffuse	0.74	0.94	1.42	1.91	2.17	2.34	2.25	1.97	1.48	1.01	0.79	0.66	1.48
Direct	3.89	5.01	4.97	5.09	6.10	6.02	5.87	5.53	5.59	5.51	4.24	3.66	5.12
Tilt 0	2.16	3.19	4.11	5.04	6.13	6.35	6.19	5.54	4.75	3.77	2.42	1.89	4.30
Tilt 25	3.31	4.40	4.91	5.36	6.08	6.12	6.04	5.72	5.47	5.05	3.61	3.02	4.93
Tilt 40	3.76	4.80	5.05	5.19	5.65	5.58	5.56	5.45	5.52	5.45	4.06	3.49	4.96
Tilt 55	4.00	4.93	4.93	4.77	4.95	4.78	4.81	4.91	5.28	5.54	4.28	3.75	4.74
Tilt 90	3.65	4.15	3.67	3.06	2.79	2.55	2.63	2.96	3.70	4.55	3.84	3.50	3.42
OPT	4.03	4.93	5.05	5.36	6.22	6.37	6.23	5.75	5.54	5.55	4.30	3.80	5.26
OPT ANG	63.0	54.0	40.0	23.0	11.0	6.00	8.00	18.0	35.0	52.0	61.0	65.0	36.2

Parameter Definition

Parameters for Sizing Battery or other Energy-storage Systems:

**Minimum Available Insolation Over A Consecutive-day Period (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min/1 day	3.17	9.09	4.15	4.52	5.01	7.41	11.1	9.91	5.35	5.09	3.92	4.29
Min/3 day	25.9	23.7	23.9	15.3	20.7	20.8	27.5	29.3	18.4	20.7	19.4	29.8
Min/7 day	32.0	52.5	51.2	42.2	42.7	44.1	50.8	50.1	43.2	48.7	44.5	47.8
Min/14 day	51.0	67.1	71.2	61.6	55.5	58.7	75.5	71.7	62.5	55.3	59.1	63.4
Min/21 day	70.5	67.4	79.7	72.4	61.5	61.4	74.7	78.7	72.2	66.7	67.0	66.9
Min/Month	86.2	85.4	88.6	83.9	69.8	78.4	85.7	90.4	84.6	85.0	79.9	77.3

Parameter Definition

**Solar Radiation Deficits Below Expected Values Incident On A Horizontal Surface Over A Consecutive-day Period (kWh/m²)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1 day	1.83	2.50	3.46	4.22	4.92	5.12	4.93	4.45	3.89	2.98	1.96	1.56
3 day	4.20	6.29	8.24	11.2	12.3	13.1	12.0	10.4	10.0	7.47	4.93	3.43
7 day	8.98	9.13	12.3	17.8	20.7	21.6	19.0	17.2	16.3	11.2	7.92	5.95
14 day	12.9	12.6	14.5	23.7	32.2	31.9	18.9	19.5	21.5	19.6	11.6	8.34
21 day	11.6	18.7	15.3	25.5	41.8	44.7	29.3	22.0	23.9	21.9	14.1	11.3
Month	8.06	11.2	12.7	21.3	48.3	35.7	24.4	14.5	18.9	14.5	12.3	11.4

Parameter Definition

**Equivalent Number Of NO-SUN Or BLACK Days (days)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1 day	0.96	0.90	0.95	0.95	0.94	0.92	0.88	0.90	0.94	0.94	0.96	0.95
3 day	2.22	2.28	2.28	2.54	2.37	2.37	2.17	2.11	2.44	2.37	2.41	2.10
7 day	4.75	3.32	3.41	4.04	4.00	3.90	3.43	3.48	3.97	3.58	3.88	3.65
14 day	6.85	4.60	4.02	5.37	6.21	5.76	3.41	3.95	5.23	6.25	5.72	5.11
21 day	6.18	6.82	4.24	5.77	8.06	8.09	5.29	4.46	5.83	6.98	6.92	6.95
Month	4.26	4.07	3.52	4.81	9.33	6.45	4.41	2.94	4.59	4.64	6.02	7.03

Parameter Definition

Parameters for Sizing Surplus-product Storage Systems:

**Available Surplus Insolation Over A Consecutive-day Period (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max/1 day	197	195	189	182	172	160	161	166	175	174	195	182
Max/3 day	177	176	187	178	171	151	151	152	168	167	173	176
Max/7 day	159	151	163	171	147	137	139	143	153	152	157	148
Max/14 day	144	137	140	154	134	126	129	130	134	140	152	125
Max/21 day	133	133	131	134	125	123	124	125	126	134	142	122
Max/Month	115	119	115	115	119	116	112	113	118	121	120	117

Parameter Definition

Cloud Information:

**Monthly Averaged Daylight Cloud Amount (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	72.9	70.3	72.9	66.5	66.5	64.8	62.4	62.8	60.1	57.6	67.4	71.9	66.3

Parameter Definition

**Monthly Averaged Cloud Amount At Indicated GMT Times (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average@00	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@03	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@06	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@09	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Average@12	n/a	n/a	n/a	63.6	62.9	60.1	57.4	57.3	55.4	n/a	n/a	n/a
Average@15	70.9	69.8	71.1	65.6	64.3	60.7	59.1	60.7	60.1	57.1	66.6	70.9
Average@18	74.8	71.7	74.6	67.6	69.9	69.2	68.9	68.7	65.1	59.7	68.2	72.8
Average@21	n/a	69.3	72.8	69.2	69.1	69.2	64.3	64.4	59.7	56.2	n/a	n/a

Parameter Definition

**Monthly Averaged Frequency Of Clear Skies At Indicated GMT Times (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
< 10% @0	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
< 10% @3	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
< 10% @6	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
< 10% @9	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
< 10% @12	n/a	n/a	25.2	18.7	20.9	20.4	23.7	22.4	24.0	n/a	n/a	n/a
< 10% @15	11.5	12.7	14.0	21.6	21.1	21.6	22.8	20.2	24.3	26.8	16.9	11.5
< 10% @18	7.92	10.4	11.8	19.2	15.6	14.3	11.0	12.0	19.7	26.1	18.3	10.7
< 10% @21	n/a	14.9	13.0	17.8	14.6	10.9	12.6	13.7	22.4	28.1	n/a	n/a

**Monthly Averaged Frequency Of Broken-cloud Skies At Indicated GMT Times (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
10 - 70% @0	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
10 - 70% @3	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
10 - 70% @6	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
10 - 70% @9	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
10 - 70% @12	n/a	n/a	25.9	22.2	20.8	25.1	23.1	26.5	27.1	n/a	n/a	n/a
10 - 70% @15	21.9	21.7	18.6	15.4	18.3	22.2	23.0	24.3	19.0	21.2	18.7	21.8
10 - 70% @18	21.4	23.3	16.2	16.2	17.0	20.3	26.5	24.6	18.3	17.8	16.3	19.7
10 - 70% @21	n/a	19.1	16.4	15.3	21.2	25.7	30.9	29.7	23.4	20.1	n/a	n/a

**Monthly Averaged Frequency Of Near-overcast Skies At Indicated GMT Times (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
>= 70% @0	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
>= 70% @3	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
>= 70% @6	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
>= 70% @9	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
>= 70% @12	n/a	n/a	48.8	58.9	58.2	54.3	53.0	51.0	48.8	n/a	n/a	n/a
>= 70% @15	66.4	65.5	67.3	62.8	60.5	56.0	54.1	55.4	56.5	51.9	64.2	66.5
>= 70% @18	70.6	66.2	71.8	64.5	67.3	65.3	62.4	63.3	61.9	56.0	65.3	69.5
>= 70% @21	n/a	65.9	70.5	66.8	64.0	63.3	56.4	56.4	54.0	51.7	n/a	n/a

Parameter Definition

Meteorology (Temperature):

**Monthly Averaged Air Temperature At 10 m Above The Surface Of The Earth (°C)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	-2.2	-0.57	3.74	10.2	16.3	21.6	23.9	22.8	18.8	12.3	6.47	0.63	11.2

Parameter Definition Units Conversion Chart

**Average Daily Temperature Range (°C)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
25-year Average	7.25	7.77	8.72	9.90	10.8	10.8	10.3 *	9.86	9.76	9.66	8.02	6.77

* Warmest month

Parameter Definition

**Monthly Averaged Cooling Degree Days Above 18 °C**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Sum
25-year Average	0	0	0	3	33	117	185	157	67	9	0	0	571

Parameter Definition

**Monthly Averaged Heating Degree Days Below 18 °C**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Sum
25-year Average	628	525	436	234	84	8	0	0	33	178	342	538	3006

Parameter Definition

**Monthly Averaged Arctic Heating Degree Days Below 10 °C**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Sum
25-year Average	382	300	202	50	2	0	0	0	0	26	128	294	1384

Parameter Definition

**Monthly Averaged Arctic Heating Degree Days Below 0 °C**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Sum
25-year Average	116	71	22	0	0	0	0	0	0	0	3	56	268

Parameter Definition

**Monthly Averaged Earth Skin Temperature (°C)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
25-year Average	-2.89	-0.96	3.75	10.5	16.7	21.9	24.1	22.8	18.6	11.8	5.73	-0.11	11.0

Parameter Definition

**Average Minimum, Maximum and Amplitude Of The Daily Mean Earth Temperature (°C)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Amplitude
Minimum	-7.36	-5.86	-1.65	3.83	9.10	14.3	17.0	16.4	12.5	5.82	0.96	-4.05
Maximum	1.84	4.65	10.4	18.2	24.9	30.3	32.5	30.9	26.4	19.1	11.2	4.23
Amplitude	4.59	5.25	6.05	7.19	7.94	7.96	7.76	7.29	6.96	6.65	5.12	4.13	19.9

Parameter Definition

**Monthly Averaged Frost Days (days)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Sum
25-year Average	25	21	17	3	0	0	0	0	0	0	9	21	96

Parameter Definition


Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
	-7.15	-6.19	-2.31	2.82	7.47	12.40	14.94	14.79	11.16	5.19	0.74	-4.59

Parameter Definition


Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
	-1.79	-0.90	0.99	3.59	6.57	9.44	11.89	13.50	14.24	14.14	13.49	12.42
	-2.92	-2.17	-0.46	1.84	4.42	6.92	9.10	10.64	11.40	11.39	10.88	9.96
	-3.22	-2.58	-1.02	1.08	3.49	5.89	8.01	9.51	10.26	10.26	9.82	8.98
	-4.11	-3.52	-2.00	0.04	2.37	4.70	6.79	8.27	9.01	9.01	8.59	7.77
	-4.04	-3.53	-1.96	0.35	3.09	5.79	8.10	9.63	10.27	10.12	9.59	8.69
	-2.38	-1.53	0.34	2.97	5.96	8.77	11.16	12.79	13.52	13.43	12.78	11.72
	0.41	1.33	3.30	5.98	9.01	11.89	14.34	16.01	16.82	16.80	16.16	15.05
	0.12	1.21	3.39	6.26	9.38	12.24	14.65	16.28	17.08	17.06	16.38	15.21

Parameter Definition Units Conversion Chart

Meteorology (Wind):

**Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	6.04	6.05	6.22	6.09	5.31	4.88	4.49	4.38	4.61	5.00	5.67	5.88	5.38

**Minimum And Maximum Difference From Monthly Averaged Wind Speed At 50 m (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
Minimum	-14	-11	-13	-10	-12	-9	-10	-8	-7	-16	-9	-6	-10
Maximum	8	9	12	8	13	9	12	7	7	10	12	6	9

It is recommended that users of these wind data review the SSE Methodology. The user may wish to correct for biases as well as local effects within the selected grid region.

All height measurements are from the soil, water, or ice/snow surface instead of "effective" surface, which is usually taken to be near the tops of vegetated canopies.

Parameter Definition Units Conversion Chart

**Monthly Averaged Percent Of Time The Wind Speed At 50 m Above The Surface Of The Earth Is Within The Indicated Range (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
0 - 2 m/s	7	6	6	6	9	12	16	18	15	11	8	7	10
3 - 6 m/s	51	53	50	52	63	69	71	69	70	68	59	56	61
7 - 10 m/s	39	37	39	38	26	19	13	13	15	21	32	33	27
11 - 14 m/s	3	4	5	4	1	0	0	0	0	0	2	3	2
15 - 18 m/s	0	0	0	0	0	0	0	0	0	0	0	0	0
19 - 25 m/s	0	0	0	0	0	0	0	0	0	0	0	0	0

Parameter Definition

**Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth For Indicated GMT Times (m/s)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
Average@0130	6.32	6.35	6.38	6.29	5.57	5.35	5.05	4.93	5.17	5.50	6.03	6.17	5.75
Average@0430	6.45	6.46	6.45	6.50	5.88	5.69	5.46	5.31	5.44	5.60	6.21	6.34	5.97
Average@0730	6.45	6.37	6.36	6.35	5.78	5.49	5.26	5.14	5.29	5.48	6.17	6.34	5.86
Average@1030	6.42	6.29	6.26	6.01	5.32	4.80	4.61	4.76	5.01	5.32	6.00	6.27	5.58
Average@1330	6.02	5.70	5.38	4.63	3.84	3.30	2.78	2.71	3.14	4.07	5.40	5.94	4.40
Average@1630	4.92	5.05	5.92	6.00	5.18	4.54	4.03	3.85	3.93	4.07	4.51	4.76	4.72
Average@1930	5.78	6.08	6.60	6.56	5.54	4.95	4.42	4.24	4.42	4.96	5.51	5.46	5.37
Average@2230	5.95	6.11	6.45	6.38	5.35	4.93	4.33	4.19	4.51	5.00	5.52	5.75	5.36

Parameter Definition Units Conversion Chart

**Monthly Averaged Wind Direction At 50 m Above The Surface Of The Earth (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
10-year Average	297	301	301	298	296	292	289	287	288	289	288	289

Parameter Definition

**Monthly Averaged Wind Direction At 50 m Above The Surface Of The Earth For Indicated GMT Times (degrees)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average@0130	288	301	283	238	233	248	239	214	223	262	265	278
Average@0430	291	303	282	247	249	253	243	218	223	263	263	283
Average@0730	297	306	294	279	279	269	262	255	281	294	279	293
Average@1030	301	307	306	304	300	282	280	294	315	310	290	299
Average@1330	302	309	312	316	313	300	295	316	325	315	295	303
Average@1630	306	314	314	291	289	286	277	296	316	315	300	307
Average@1930	298	306	298	270	260	268	259	270	290	296	292	304
Average@2230	291	305	297	264	249	261	255	249	282	290	285	288

Parameter Definition

**Monthly Averaged Wind Speed At 10 m Above The Surface Of The Earth For Terrain Similar To Airports (m/s)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	4.76	4.78	4.91	4.80	4.19	3.86	3.55	3.47	3.64	3.95	4.48	4.65	4.25

It is recommended that users of these wind data review the SSE Methodology. The user may wish to correct for biases as well as local effects within the selected grid region.

All height measurements are from the soil, water, or ice/snow surface instead of "effective" surface, which is usually taken to be near the tops of vegetated canopies.

Parameter Definition Units Conversion Chart

Difference Between The Average Wind Speed At 10 m Above The Surface Of The Earth And The Average Wind speed At 50 m Above The Surface Of The Earth (%)
***Vegetation type*** "Airport": flat rough grass
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	-20	-21	-20	-21	-21	-21	-20	-21	-20	-20	-20	-21	-20

Parameter Definition

Monthly Averaged Wind Speed Adjusted For Height And Vegetation Type (m/s)
***Height*** 100 meters
***Vegetation type*** "Airport": flat rough grass
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	6.70	6.71	6.90	6.75	5.89	5.41	4.98	4.87	5.11	5.54	6.29	6.52	5.97

Parameter Definition

Monthly Averaged Wind Speed At 50, 100, 150 and 300 m Above The Surface Of The Earth (m/s)
***Vegetation type*** "Airport": flat rough grass
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
50m	6.04	6.05	6.22	6.09	5.31	4.88	4.49	4.38	4.61	5.00	5.67	5.88	5.38
100m	6.70	6.71	6.90	6.75	5.89	5.41	4.98	4.87	5.11	5.54	6.29	6.52	5.97
150m	7.12	7.13	7.33	7.18	6.26	5.75	5.29	5.17	5.43	5.89	6.68	6.93	6.34
300m	7.90	7.91	8.13	7.96	6.94	6.38	5.87	5.74	6.03	6.54	7.41	7.69	7.04

Parameter Definition

Monthly Averaged Wind Speed For Several Vegetation And Surface Types (m/s)
***Height*** 100 meters
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
35-m broadleaf-evergreen trees (70% coverage)	8.36	8.37	8.61	8.43	7.35	6.75	6.21	6.08	6.38	6.92	7.85	8.14	7.45
20-m broadleaf-deciduous trees (75% coverage)	7.64	7.71	7.98	7.87	6.95	6.52	6.09	5.87	6.04	6.46	7.27	7.49	6.98
20-m broadleaf and needleleaf trees (75% coverage)	8.60	8.37	8.37	8.09	6.95	6.35	5.84	5.83	6.21	6.87	7.90	8.31	7.30
17-m needleleaf-evergreen trees (75% coverage)	8.13	7.92	7.98	7.70	6.76	6.26	5.80	5.67	5.95	6.50	7.42	7.81	6.99
14-m needleleaf-deciduous trees (50% coverage)	8.02	7.92	8.03	7.76	6.76	6.17	5.68	5.71	6.16	6.78	7.69	7.92	7.04
Savanna:18-m broadleaf trees (30%) & groundcover	8.02	8.03	8.26	8.09	7.05	6.48	5.96	5.83	6.12	6.64	7.53	7.81	7.14
0.6-m perennial groundcover (100%)	7.28	7.29	7.50	7.34	6.40	5.88	5.41	5.29	5.55	6.02	6.83	7.09	6.48
0.5-m broadleaf shrubs (variable %) & groundcover	7.28	7.29	7.50	7.34	6.40	5.88	5.41	5.29	5.55	6.02	6.83	7.09	6.48
0.5-m broadleaf shrubs (10%) with bare soil	7.28	7.29	7.50	7.34	6.40	5.88	5.41	5.29	5.55	6.02	6.83	7.09	6.48
Tundra: 0.6-m trees/shrubs (variable %) & groundcover	7.28	7.29	7.50	7.34	6.40	5.88	5.41	5.29	5.55	6.02	6.83	7.09	6.48
Rough bare soil	7.03	7.04	7.24	7.09	6.18	5.68	5.22	5.11	5.36	5.82	6.60	6.84	6.26
Crop: 20-m broadleaf-deciduous trees (10%) & wheat	7.33	7.44	7.29	7.76	6.76	6.21	5.72	5.59	5.87	6.28	7.02	7.18	6.70
Rough glacial snow/ice	7.69	7.60	7.65	7.39	6.44	5.92	5.45	5.33	5.67	6.28	7.17	7.49	6.67
Smooth sea ice	6.84	6.71	6.75	6.48	5.65	5.19	4.77	4.77	5.11	5.70	6.46	6.70	5.92
Open water	6.47	6.48	6.66	6.52	5.69	5.23	4.81	4.70	4.94	5.35	6.07	6.30	5.76
"Airport": flat rough grass	6.70	6.71	6.90	6.75	5.89	5.41	4.98	4.87	5.11	5.54	6.29	6.52	5.97

Parameter Definition

Meteorology (Other):


Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
	70.07	67.70	66.88	63.49	59.53	59.29	60.57	63.63	64.12	64.57	68.75	69.50

Parameter Definition

**Monthly Averaged Humidity Ratio At 10 m Above The Surface Of The Earth (%)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
22-year Average	0.002782	0.002929	0.003891	0.005369	0.007333	0.010004	0.011645	0.011488	0.009285	0.006294	0.004732	0.003274

Parameter Definition

**Monthly Averaged Atmospheric Pressure (kPa)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
25-year Average	99.5	99.5	99.4	99.2	99.3	99.2	99.3	99.4	99.5	99.6	99.6	99.5	99.4

Parameter Definition

**Monthly Averaged Total Column Precipitable Water (cm)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	0.91	0.92	1.11	1.48	2.02	2.76	3.23	3.11	2.52	1.73	1.40	1.03	1.85

Parameter Definition

**Monthly Averaged Precipitation (mm/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
25-year Average	2.96	2.74	3.30	2.94	3.30	3.11	3.38	3.24	3.51	2.68	3.24	3.10	3.12

Parameter Definition

Supporting Information:

**Monthly Averaged Top-of-atmosphere Insolation (kWh/m²/day)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	4.19	5.68	7.70	9.67	11.0	11.6	11.2	10.1	8.35	6.31	4.57	3.75	7.86

Parameter Definition

**Monthly Averaged Surface Albedo (0 to 1.0)**
Lat 40.178 Lon -75.332	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	0.20	0.18	0.13	0.11	0.13	0.12	0.13	0.11	0.12	0.11	0.11	0.13	0.13

Parameter Definition

Back to SSE Data Set Home Page

Questions?

Responsible NASA Official: John M. Kusterer
Site Administration/Help: NASA Langley ASDC User
Services (larc@eos.nasa.gov)
[Privacy Policy and Important Notices]
Document generated on Sun Sep 20 11:03:54 EDT 2009