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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 | 42 | 41 | 42 | 38 | 41 | 45 | 47 | 47 | 46 | 42 | 42 | 47 |
| Average high, °C | 37 | 37 | 32 | 29 | 27 | 31 | 35 | 40 | 41 | 40 | 36 | 35 | 35 |
| Average temperature, °C | 31 | 30 | 25 | 22 | 20 | 24 | 28 | 32 | 33 | 33 | 31 | 30 | 28 |
| Average low, °C | 24 | 22 | 18 | 14 | 13 | 16 | 20 | 25 | 26 | 26 | 25 | 24 | 21 |
| Record low, °C | 18 | 16 | 9 | 0 | 2 | 0 | 12 | 12 | 17 | 20 | 20 | 20 | 0 |
| Rain, days | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 4 | 4 | 14 |
| Fog, days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Thunderstorms, days | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 9 | 11 | 29 |
| Relative humidity morning, % | 75 | 45 | 37 | 38 | 36 | 29 | 26 | 31 | 48 | 60 | 79 | 85 | 49 |
| Relative humidity evening, % | 30 | 19 | 17 | 17 | 16 | 13 | 12 | 14 | 19 | 25 | 39 | 44 | 22 |
| Wind speed, km/h | 9 | 12 | 9 | 12 | 12 | 12 | 12 | 12 | 9 | 12 | 12 | 9 | 11 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 |
| Dew point, °C | 17 | 8 | 3 | 1 | 0 | 0 | 0 | 6 | 13 | 16 | 20 | 21 | 105 |
| Growing degree-day, °C | 600 | 620 | 467 | 370 | 336 | 400 | 560 | 600 | 620 | 600 | 620 | 611 | 6404 |
| Solar radiation, global, Mj/m2 | 24 | 24 | 22 | 20 | 21 | 24 | 26 | 27 | 27 | 26 | 24 | 23 | 24 |