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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 | 41 | 40 | 40 | 37 | 38 | 40 | 42 | 43 | 43 | 45 | 40 | 41 | 45 |
| Average high, °C | 33 | 35 | 33 | 29 | 28 | 32 | 36 | 38 | 38 | 36 | 32 | 31 | 33 |
| Average temperature, °C | 28 | 28 | 25 | 22 | 21 | 25 | 28 | 32 | 32 | 31 | 28 | 27 | 27 |
| Average low, °C | 23 | 22 | 18 | 15 | 14 | 17 | 21 | 25 | 27 | 26 | 23 | 23 | 21 |
| Record low, °C | 18 | 15 | 10 | 7 | 6 | 7 | 11 | 15 | 21 | 19 | 19 | 20 | 6 |
| Rain, days | 6 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 4 | 7 | 9 | 31 |
| Fog, days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 |
| Thunderstorms, days | 10 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 8 | 13 | 14 | 53 |
| Average precipitation, mm. | 91 | 10 | 0 | 0 | 0 | 0 | 1 | 5 | 29 | 77 | 168 | 205 | 586 |
| Relative humidity, % | 71 | 52 | 27 | 25 | 20 | 16 | 20 | 33 | 48 | 59 | 69 | 75 | 43 |
| Relative humidity morning, % | 90 | 63 | 39 | 37 | 34 | 28 | 26 | 35 | 60 | 73 | 85 | 91 | 55 |
| Relative humidity evening, % | 49 | 23 | 16 | 16 | 15 | 12 | 12 | 15 | 26 | 36 | 52 | 59 | 28 |
| Wind speed, km/h | 9 | 14 | 14 | 16 | 16 | 17 | 16 | 14 | 14 | 14 | 14 | 12 | 14 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 21 | 12 | 3 | 0 | -1 | -1 | 0 | 6 | 16 | 19 | 21 | 22 | 118 |
| Growing degree-day, °C | 550 | 586 | 475 | 379 | 353 | 416 | 586 | 600 | 620 | 600 | 560 | 534 | 6258 |
| Solar radiation, global, Mj/m2 | 22 | 22 | 21 | 19 | 20 | 23 | 25 | 26 | 26 | 25 | 23 | 21 | 23 |