Cotonou
Benin
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 35 | 38 | 38 | 37 | 39 | 41 | 42 | 42 | 42 | 39 | 37 | 34 | 42 |
| Average high, °C | 30 | 33 | 34 | 32 | 31 | 34 | 36 | 37 | 35 | 32 | 30 | 29 | 33 |
| Average temperature, °C | 25 | 27 | 26 | 24 | 24 | 27 | 30 | 31 | 29 | 27 | 26 | 25 | 27 |
| Average low, °C | 22 | 22 | 18 | 17 | 18 | 21 | 25 | 26 | 25 | 23 | 22 | 22 | 22 |
| Record low, °C | 17 | 10 | 6 | 6 | 10 | 10 | 11 | 16 | 20 | 18 | 17 | 18 | 6 |
| Rain, days | 11 | 3 | 1 | 1 | 0 | 1 | 1 | 3 | 7 | 8 | 11 | 14 | 61 |
| Fog, days | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 8 |
| Thunderstorms, days | 17 | 8 | 0 | 0 | 0 | 0 | 2 | 8 | 16 | 17 | 17 | 18 | 103 |
| Average precipitation, mm. | 205 | 44 | 1 | 0 | 0 | 1 | 9 | 37 | 103 | 146 | 195 | 283 | 1024 |
| Relative humidity, % | 78 | 67 | 46 | 34 | 29 | 26 | 35 | 50 | 62 | 71 | 77 | 80 | 55 |
| Relative humidity morning, % | 94 | 89 | 68 | 48 | 39 | 35 | 44 | 64 | 78 | 87 | 92 | 94 | 69 |
| Relative humidity evening, % | 64 | 44 | 22 | 16 | 14 | 12 | 18 | 28 | 42 | 55 | 65 | 69 | 37 |
| Wind speed, km/h | 6 | 6 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 22 | 20 | 11 | 5 | 2 | 2 | 8 | 16 | 21 | 22 | 22 | 22 | 173 |
| Growing degree-day, °C | 450 | 517 | 467 | 431 | 431 | 471 | 620 | 617 | 586 | 500 | 482 | 465 | 6035 |
| Solar radiation, global, Mj/m2 | 19 | 21 | 21 | 20 | 20 | 22 | 22 | 23 | 22 | 21 | 18 | 17 | 21 |