Cotonou
Benin
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 33 | 38 | 38 | 37 | 38 | 40 | 42 | 42 | 38 | 37 | 37 | 37 | 42 |
| Average high, °C | 28 | 31 | 33 | 32 | 32 | 35 | 35 | 35 | 32 | 30 | 28 | 28 | 32 |
| Average temperature, °C | 25 | 27 | 27 | 26 | 26 | 28 | 30 | 30 | 29 | 27 | 25 | 25 | 27 |
| Average low, °C | 21 | 21 | 19 | 19 | 20 | 22 | 23 | 24 | 23 | 22 | 21 | 21 | 21 |
| Record low, °C | 16 | 16 | 12 | 12 | 10 | 14 | 17 | 20 | 18 | 18 | 18 | 18 | 10 |
| Rain, days | 12 | 5 | 1 | 0 | 0 | 1 | 2 | 4 | 6 | 7 | 11 | 12 | 61 |
| Fog, days | 4 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 | 6 | 20 |
| Thunderstorms, days | 16 | 15 | 3 | 0 | 0 | 1 | 4 | 11 | 14 | 13 | 13 | 14 | 104 |
| Average precipitation, mm. | 224 | 60 | 2 | 2 | 0 | 4 | 20 | 53 | 100 | 140 | 219 | 242 | 1067 |
| Relative humidity, % | 79 | 71 | 50 | 35 | 29 | 30 | 42 | 57 | 68 | 74 | 80 | 81 | 58 |
| Relative humidity morning, % | 96 | 93 | 68 | 39 | 31 | 32 | 55 | 77 | 88 | 93 | 95 | 96 | 72 |
| Relative humidity evening, % | 70 | 57 | 31 | 20 | 17 | 16 | 26 | 41 | 54 | 61 | 68 | 72 | 44 |
| Wind speed, km/h | 4 | 5 | 5 | 6 | 9 | 8 | 8 | 9 | 8 | 6 | 6 | 5 | 7 |
| Day Length, часов | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 12 |
| Dew point, °C | 22 | 21 | 16 | 10 | 7 | 9 | 16 | 21 | 22 | 22 | 22 | 22 | 207 |
| Growing degree-day, °C | 462 | 524 | 504 | 496 | 499 | 520 | 629 | 609 | 583 | 504 | 474 | 468 | 6272 |
| Solar radiation, global, Mj/m2 | 19 | 21 | 21 | 20 | 20 | 22 | 23 | 23 | 22 | 20 | 18 | 18 | 21 |