NASA Surface meteorology and Solar Energy

**Monthly Averaged Insolation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	0.28	1.15	2.81	4.55	5.41	6.32	5.95	4.57	2.62	1.36	0.44	0.12	2.97

**Minimum And Maximum Difference From Monthly Averaged Insolation (%)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Minimum	-11	-16	-9	-9	-18	-14	-10	-16	-16	-18	-11	-8
Maximum	11	11	12	5	14	12	11	15	19	13	16	17

**Monthly Averaged Diffuse Radiation Incident On A Horizontal Surface (kWh/m²/day)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	0.19	0.70	1.44	1.99	2.48	2.78	2.62	2.19	1.40	0.82	0.29	0.09	1.42
Minimum	0.21	0.74	1.59	2.06	2.44	2.72	2.57	2.29	1.52	0.90	0.33	0.10	1.46
Maximum	0.18	0.61	1.36	1.94	2.46	2.78	2.62	2.19	1.32	0.71	0.27	0.08	1.38
22-year Average K	0.42	0.57	0.62	0.60	0.53	0.55	0.55	0.54	0.47	0.48	0.44	0.34	0.51
Minimum K	0.37	0.48	0.57	0.55	0.44	0.47	0.50	0.45	0.40	0.40	0.39	0.31	0.44
Maximum K	0.46	0.63	0.70	0.63	0.60	0.62	0.61	0.62	0.56	0.55	0.52	0.40	0.57

**Monthly Averaged Radiation Incident On An Equator-Pointed Tilted Surface (kWh/m²/day)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE HRZ	0.28	1.15	2.81	4.55	5.41	6.32	5.95	4.57	2.62	1.36	0.44	0.12	2.97
K	0.42	0.57	0.62	0.60	0.53	0.55	0.55	0.54	0.47	0.48	0.44	0.34	0.51
Diffuse	0.19	0.70	1.44	1.99	2.48	2.78	2.62	2.19	1.40	0.82	0.29	0.09	1.42
Direct	0.90	2.41	4.43	6.15	6.18	7.33	6.92	5.34	3.42	2.35	1.20	0.44	3.93
Tilt 0	0.28	1.14	2.78	4.52	5.48	6.41	6.02	4.59	2.58	1.35	0.44	0.12	2.98
Tilt 47	0.84	2.34	4.33	5.60	5.51	6.00	5.83	5.09	3.51	2.39	1.21	0.46	3.60
Tilt 62	0.93	2.48	4.39	5.37	5.06	5.42	5.31	4.77	3.46	2.49	1.33	0.52	3.46
Tilt 77	0.97	2.49	4.22	4.87	4.46	4.69	4.63	4.28	3.24	2.45	1.38	0.55	3.19
Tilt 90	0.96	2.39	3.89	4.29	3.79	3.93	3.90	3.71	2.93	2.32	1.35	0.54	2.84
OPT	0.97	2.51	4.40	5.61	5.79	6.53	6.23	5.17	3.51	2.49	1.38	0.55	3.77
OPT ANG	79.0	71.0	58.0	42.0	25.0	16.0	18.0	33.0	50.0	66.0	78.0	82.0	51.3

**Minimum Available Insolation Over A Consecutive-day Period (%)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min/1 day	39.2	1.72	27.4	28.0	9.42	14.2	15.2	15.0	2.67	2.94	36.3	66.6
Min/3 day	40.4	42.8	55.2	46.9	35.7	26.1	27.1	30.9	35.6	41.9	37.8	66.6
Min/7 day	43.8	51.2	64.0	65.8	58.1	51.6	49.1	42.4	53.6	52.9	41.8	69.0
Min/14 day	55.1	62.0	74.3	72.3	74.2	70.7	73.9	54.5	65.1	62.2	51.9	75.0
Min/21 day	64.2	68.3	80.6	84.2	81.1	80.5	79.7	67.6	74.6	73.6	66.5	79.7
Min/Month	89.2	83.6	91.4	91.4	82.2	86.0	90.0	83.5	83.9	82.3	88.6	91.6

**Equivalent Number Of NO-SUN Or BLACK Days (days)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1 day	0.60	0.98	0.72	0.71	0.90	0.85	0.84	0.84	0.97	0.97	0.63	0.33
3 day	1.78	1.71	1.34	1.59	1.92	2.21	2.18	2.07	1.93	1.74	1.86	1.00
7 day	3.92	3.41	2.51	2.39	2.92	3.38	3.55	4.02	3.24	3.29	4.06	2.16
14 day	6.28	5.31	3.59	3.86	3.60	4.09	3.65	6.36	4.88	5.28	6.72	3.50
21 day	7.50	6.65	4.06	3.30	3.96	4.08	4.26	6.78	5.32	5.53	7.02	4.24
Month	3.32	4.58	2.64	2.56	5.50	4.17	3.07	5.08	4.80	5.47	3.40	2.58

**Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	3.67	3.56	3.69	3.62	3.43	3.70	3.77	3.72	3.67	3.47	3.50	3.64	3.62

**Minimum And Maximum Difference From Monthly Averaged Wind Speed At 50 m (%)**
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
Minimum	-12	-8	-13	-5	-8	-8	-13	-10	-11	-8	-9	-7	-9
Maximum	9	7	7	14	10	7	12	10	8	11	9	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.

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*** Rough bare soil
Lat 62 Lon 129.75	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	-30	-30	-30	-30	-30	-30	-30	-30	-30	-30	-30	-30	-30