NASA Surface meteorology and Solar Energy

**Monthly Averaged Radiation Incident On An Equator-Pointed Tilted Surface (kWh/m²/day)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
SSE HRZ	1.28	2.36	3.86	4.94	5.78	5.72	5.15	4.44	3.46	2.25	1.39	0.97	3.47
K	0.54	0.60	0.62	0.56	0.54	0.49	0.46	0.47	0.49	0.48	0.51	0.51	0.52
Diffuse	0.75	1.20	1.79	2.06	2.50	2.72	2.63	2.24	1.68	1.16	0.80	0.59	1.68
Direct	2.31	3.64	4.87	5.53	5.74	5.10	4.33	4.02	3.82	3.06	2.31	1.85	3.88
Tilt 0	1.25	2.33	3.82	4.92	5.80	5.74	5.17	4.41	3.40	2.20	1.34	0.96	3.45
Tilt 36	2.19	3.59	4.99	5.53	5.77	5.46	5.00	4.64	4.11	3.12	2.21	1.77	4.03
Tilt 51	2.40	3.82	5.07	5.33	5.33	4.93	4.55	4.38	4.08	3.25	2.40	1.97	3.96
Tilt 66	2.49	3.84	4.88	4.86	4.65	4.30	4.01	3.92	3.84	3.22	2.45	2.05	3.71
Tilt 90	2.34	3.45	4.09	3.72	3.34	3.01	2.86	2.93	3.10	2.82	2.27	1.95	2.99
OPT	2.49	3.85	5.07	5.54	5.98	5.82	5.26	4.70	4.12	3.26	2.45	2.06	4.22
OPT ANG	68.0	60.0	48.0	32.0	17.0	11.0	13.0	25.0	41.0	55.0	65.0	70.0	41.9

**Equivalent Number Of NO-SUN Or BLACK Days (days)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1 day	0.75	0.61	0.66	0.73	0.82	0.77	0.79	0.82	0.79	0.81	0.71	0.73
3 day	1.63	1.38	1.12	1.57	1.92	1.95	2.22	1.87	1.99	2.00	1.62	1.47
7 day	2.43	2.66	2.26	1.96	3.32	3.12	3.99	3.25	2.86	3.25	3.33	2.72
14 day	3.94	3.94	3.60	2.51	3.75	4.22	6.85	4.05	3.45	4.92	4.89	3.52
21 day	4.32	4.25	4.40	2.43	3.93	3.70	5.60	4.11	3.27	4.67	5.84	4.40
Month	2.90	3.44	3.45	1.63	2.84	3.40	3.43	2.44	3.72	4.27	4.96	4.79

**Available Surplus Insolation Over A Consecutive-day Period (%)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max/1 day	170	163	156	152	153	158	167	172	176	193	179	153
Max/3 day	161	152	148	144	147	157	157	163	160	180	171	141
Max/7 day	144	143	131	130	130	139	146	144	146	163	140	134
Max/14 day	130	129	120	120	125	126	127	131	134	143	138	116
Max/21 day	118	119	113	117	122	122	117	123	127	125	124	114
Max/Month	109	110	107	109	113	111	117	112	120	112	109	109

**Monthly Averaged Air Temperature At 10 m Above The Surface Of The Earth (°C)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
22-year Average	-24.8	-20.7	-12.8	-1.68	8.19	14.4	16.8	14.4	6.69	-2.15	-13.6	-21.2	-2.94
Minimum	-29.8	-26.4	-19.6	-7.34	1.99	8.36	11.5	9.81	2.59	-6.06	-18.1	-25.9	-8.17
Maximum	-20.4	-15.9	-6.72	4.01	14.1	20.1	22.1	19.7	11.6	1.81	-9.64	-16.8	2.11

**Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
10-year Average	4.37	4.21	4.24	4.66	4.36	4.05	3.77	3.75	4.01	4.25	4.38	4.38	4.20

**Minimum And Maximum Difference From Monthly Averaged Wind Speed At 50 m (%)**
Lat 51 Lon 107	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual Average
Minimum	-5	-8	-7	-14	-14	-13	-14	-7	-11	-5	-4	-7	-9
Maximum	4	10	11	8	8	10	13	9	10	5	3	5	8

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 51 Lon 107	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