Click on a day for an hourly weather forecast
The weather in Cotonou in September is very hot. The average temperatures are between 24°C and 28°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Cotonou. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Cotonou in September 2025.
If you’re planning to visit Cotonou in the near future, we highly recommend that you review the 14 day weather forecast for Cotonou before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 33° / 25° | 2 | 29 | 0 | 30 mm | Good | Cotonou in January |
| February | 32° / 26° | 4 | 24 | 0 | 52 mm | Good | Cotonou in February |
| March | 32° / 27° | 6 | 25 | 0 | 63 mm | Good | Cotonou in March |
| April | 32° / 27° | 5 | 25 | 0 | 58 mm | Good | Cotonou in April |
| May | 32° / 27° | 8 | 23 | 0 | 130 mm | Ok | Cotonou in May |
| June | 29° / 25° | 14 | 16 | 0 | 276 mm | Ok | Cotonou in June |
| July | 28° / 24° | 10 | 21 | 0 | 216 mm | Good | Cotonou in July |
| August | 28° / 23° | 5 | 26 | 0 | 104 mm | Perfect | Cotonou in August |
| September | 28° / 24° | 10 | 20 | 0 | 197 mm | Good | Cotonou in September |
| October | 30° / 25° | 7 | 24 | 0 | 148 mm | Ok | Cotonou in October |
| November | 31° / 26° | 4 | 26 | 0 | 88 mm | Good | Cotonou in November |
| December | 33° / 26° | 1 | 30 | 0 | 31 mm | Good | Cotonou in December |