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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 | 45 | 43 | 40 | 37 | 38 | 40 | 42 | 47 | 47 | 43 | 43 | 46 | 47 |
| Average high, °C | 35 | 36 | 33 | 30 | 28 | 32 | 36 | 40 | 39 | 37 | 33 | 33 | 34 |
| Average temperature, °C | 30 | 30 | 27 | 23 | 22 | 25 | 30 | 33 | 33 | 32 | 30 | 28 | 29 |
| Average low, °C | 25 | 24 | 20 | 16 | 16 | 18 | 22 | 26 | 28 | 27 | 25 | 24 | 23 |
| Record low, °C | 20 | 18 | 10 | 8 | 7 | 7 | 12 | 16 | 20 | 21 | 20 | 20 | 7 |
| Rain, days | 4 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 3 | 5 | 7 | 24 |
| Thunderstorms, days | 13 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 11 | 15 | 17 | 67 |
| Relative humidity morning, % | 78 | 46 | 30 | 29 | 28 | 23 | 20 | 25 | 46 | 65 | 78 | 84 | 46 |
| Relative humidity evening, % | 36 | 17 | 13 | 12 | 12 | 10 | 10 | 12 | 21 | 29 | 41 | 47 | 22 |
| Wind speed, km/h | 12 | 16 | 17 | 19 | 19 | 20 | 17 | 16 | 16 | 14 | 16 | 14 | 16 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 |
| Dew point, °C | 18 | 8 | 1 | -1 | -3 | -3 | -1 | 3 | 12 | 17 | 20 | 20 | 91 |
| Growing degree-day, °C | 600 | 620 | 517 | 413 | 388 | 447 | 603 | 600 | 620 | 600 | 603 | 586 | 6596 |
| Solar radiation, global, Mj/m2 | 21 | 21 | 19 | 17 | 18 | 21 | 22 | 24 | 24 | 23 | 22 | 21 | 21 |