NASA Surface meteorology and Solar Energy

**Monthly Averaged Radiation Incident On An Equator-Pointed Tilted Surface (kWh/m²/day)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE HRZ	0.49	1.27	2.52	3.87	5.13	5.36	5.22	4.19	2.57	1.31	0.62	0.30	2.74
K	0.40	0.47	0.49	0.48	0.49	0.46	0.48	0.47	0.42	0.37	0.39	0.35	0.44
Diffuse	0.33	0.77	1.40	2.01	2.62	2.76	2.63	2.22	1.45	0.81	0.42	0.21	1.47
Direct	1.10	2.13	3.25	4.10	4.93	4.96	5.00	4.09	2.85	1.83	1.23	0.74	3.02
Tilt 0	0.49	1.26	2.50	3.85	5.15	5.43	5.28	4.20	2.52	1.29	0.62	0.29	2.75
Tilt 43	1.13	2.21	3.48	4.43	5.16	5.09	5.09	4.49	3.19	1.99	1.26	0.70	3.19
Tilt 58	1.24	2.33	3.51	4.23	4.71	4.61	4.63	4.22	3.14	2.06	1.37	0.78	3.07
Tilt 73	1.29	2.34	3.36	3.84	4.18	4.03	4.07	3.80	2.94	2.02	1.40	0.82	2.84
Tilt 90	1.25	2.19	2.99	3.23	3.36	3.18	3.24	3.14	2.55	1.86	1.35	0.80	2.43
OPT	1.29	2.35	3.52	4.45	5.40	5.51	5.41	4.58	3.19	2.06	1.40	0.82	3.34
OPT ANG	75.0	66.0	53.0	36.0	22.0	13.0	15.0	29.0	46.0	60.0	72.0	77.0	46.9

**Minimum Available Insolation Over A Consecutive-day Period (%)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min/1 day	6.12	3.93	9.88	17.8	12.0	15.8	18.5	7.87	19.0	2.29	3.22	56.6
Min/3 day	46.2	39.3	36.4	29.2	26.1	30.4	35.2	27.0	30.9	17.3	24.1	57.7
Min/7 day	51.0	55.1	46.0	51.4	40.3	42.5	47.2	48.1	41.6	33.4	36.1	59.5
Min/14 day	56.8	67.5	62.6	63.8	50.2	58.9	65.7	58.9	51.5	42.7	55.8	66.1
Min/21 day	71.5	73.9	71.0	74.4	67.9	72.5	76.0	69.1	59.0	67.7	59.7	73.3
Min/Month	87.7	80.3	76.2	86.3	81.6	79.1	81.8	78.2	69.2	77.8	74.1	90.0

**Equivalent Number Of NO-SUN Or BLACK Days (days)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1 day	0.93	0.96	0.90	0.82	0.87	0.84	0.81	0.92	0.80	0.97	0.96	0.43
3 day	1.61	1.81	1.90	2.12	2.21	2.08	1.94	2.18	2.07	2.48	2.27	1.26
7 day	3.42	3.14	3.77	3.40	4.17	4.01	3.69	3.63	4.08	4.65	4.46	2.83
14 day	6.04	4.54	5.23	5.05	6.96	5.75	4.79	5.75	6.78	8.01	6.17	4.73
21 day	5.97	5.46	6.07	5.36	6.73	5.77	5.02	6.47	8.59	6.77	8.45	5.60
Month	3.79	5.51	7.35	4.10	5.68	6.26	5.64	6.73	9.22	6.86	7.74	3.10

**Available Surplus Insolation Over A Consecutive-day Period (%)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max/1 day	233	209	200	181	162	160	160	174	212	247	261	193
Max/3 day	205	188	185	171	160	156	149	164	206	242	208	173
Max/7 day	180	166	166	156	153	144	147	155	183	206	168	161
Max/14 day	159	150	151	144	135	135	134	142	152	162	153	142
Max/21 day	140	135	132	132	125	130	121	136	135	140	143	127
Max/Month	114	117	116	122	119	128	120	130	120	120	124	117

**Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	3.84	3.78	3.79	3.84	3.70	3.64	3.60	3.72	3.89	3.98	3.69	3.68	3.76

**Minimum And Maximum Difference From Monthly Averaged Wind Speed At 50 m (%)**
Lat 58.5 Lon 31.25	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
Minimum	-18	-14	-15	-11	-8	-5	-9	-9	-11	-15	-19	-14	-12
Maximum	17	20	21	10	12	6	9	11	11	22	21	12	14

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 58.5 Lon 31.25	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