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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 | 36 | 37 | 36 | 33 | 32 | 37 | 38 | 41 | 41 | 41 | 37 | 33 | 41 |
| Average high, °C | 34 | 36 | 34 | 31 | 30 | 34 | 37 | 40 | 39 | 37 | 33 | 32 | 35 |
| Average temperature, °C | 28 | 28 | 25 | 22 | 21 | 24 | 28 | 32 | 33 | 31 | 28 | 27 | 27 |
| Average low, °C | 22 | 21 | 17 | 14 | 13 | 16 | 20 | 24 | 25 | 24 | 23 | 22 | 20 |
| Record low, °C | 18 | 17 | 11 | 10 | 8 | 12 | 16 | 21 | 20 | 21 | 20 | 20 | 8 |
| 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 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 4 | 5 | 17 |
| Average precipitation, mm. | 77 | 8 | 0 | 0 | 0 | 0 | 0 | 3 | 23 | 67 | 162 | 197 | 538 |
| Relative humidity, % | 70 | 50 | 26 | 26 | 20 | 16 | 19 | 32 | 47 | 57 | 68 | 74 | 42 |
| Relative humidity morning, % | 0 | 0 | 0 | 0 | 0 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Relative humidity evening, % | 49 | 23 | 16 | 16 | 15 | 12 | 12 | 15 | 26 | 36 | 52 | 59 | 28 |
| Wind speed, km/h | 28 | 27 | 31 | 36 | 37 | 39 | 39 | 37 | 40 | 39 | 39 | 35 | 36 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 22 | 17 | 4 | 1 | -3 | -3 | 3 | 13 | 20 | 21 | 22 | 22 | 139 |
| Growing degree-day, °C | 549 | 567 | 447 | 372 | 341 | 396 | 564 | 651 | 698 | 618 | 558 | 533 | 6294 |
| Solar radiation, global, Mj/m2 | 22 | 23 | 21 | 19 | 20 | 24 | 25 | 26 | 26 | 25 | 23 | 22 | 23 |