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Niger
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 42 | 40 | 40 | 38 | 37 | 40 | 42 | 43 | 43 | 43 | 40 | 42 | 43 |
| Average high, °C | 34 | 36 | 32 | 28 | 27 | 31 | 35 | 38 | 38 | 37 | 33 | 32 | 33 |
| Average temperature, °C | 28 | 28 | 25 | 22 | 21 | 24 | 28 | 31 | 32 | 31 | 28 | 27 | 27 |
| Average low, °C | 24 | 23 | 20 | 16 | 15 | 17 | 22 | 26 | 27 | 26 | 24 | 23 | 22 |
| Record low, °C | 18 | 15 | 7 | 7 | 8 | 7 | 12 | 17 | 17 | 20 | 20 | 17 | 7 |
| Rain, days | 4 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 2 | 3 | 7 | 9 | 29 |
| Fog, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 |
| Thunderstorms, days | 11 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 10 | 16 | 18 | 62 |
| Average precipitation, mm. | 83 | 9 | 0 | 0 | 0 | 0 | 1 | 3 | 27 | 67 | 169 | 208 | 565 |
| Relative humidity, % | 70 | 50 | 26 | 28 | 21 | 17 | 20 | 33 | 47 | 57 | 68 | 74 | 42 |
| Relative humidity morning, % | 77 | 43 | 32 | 32 | 30 | 24 | 21 | 26 | 46 | 62 | 77 | 83 | 46 |
| Relative humidity evening, % | 36 | 18 | 14 | 15 | 13 | 11 | 10 | 12 | 19 | 27 | 42 | 49 | 22 |
| Wind speed, km/h | 10 | 9 | 11 | 12 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 12 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 22 | 17 | 4 | 2 | -3 | -3 | 3 | 13 | 20 | 21 | 22 | 22 | 140 |
| Growing degree-day, °C | 549 | 564 | 435 | 366 | 329 | 381 | 552 | 642 | 691 | 621 | 564 | 533 | 6228 |
| Solar radiation, global, Mj/m2 | 22 | 23 | 21 | 19 | 20 | 24 | 25 | 26 | 26 | 25 | 23 | 22 | 23 |