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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 | 29 | 30 | 26 | 22 | 21 | 25 | 28 | 32 | 33 | 32 | 29 | 28 | 28 |
| 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 |
| 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 | 9 | 12 | 14 | 14 | 14 | 14 | 14 | 12 | 14 | 14 | 14 | 12 | 13 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 |
| Dew point, °C | 18 | 8 | 2 | 0 | -2 | -2 | -1 | 3 | 11 | 16 | 20 | 20 | 93 |
| Growing degree-day, °C | 583 | 620 | 492 | 388 | 362 | 408 | 577 | 600 | 620 | 600 | 594 | 560 | 6403 |
| Solar radiation, global, Mj/m2 | 23 | 23 | 22 | 20 | 21 | 24 | 26 | 27 | 27 | 26 | 25 | 23 | 24 |