Cotonou in september: average Weather, Temperature and Climate
Weather in Cotonou in september 2025
The weather in Cotonou in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 7
Weather at 6am
77°F
Partly Cloudy
35% of time
28%
25%
11%
Weather at 12pm
85°F
Partly Cloudy
47% of time
25%
13%
10%
Weather at 6pm
79°F
Moderate rain at times
38% of time
29%
19%
10%
Weather at 3am
77°F
35%
34%
20%
10%
Evolution of daily average temperature and precipitation in Cotonou in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Cotonou in september.
The climate of Cotonou in september is good
In september in Cotonou, the climate is wet (with 6.3in of precipitation over 9 days). The weather's not getting better compared to the previous month since in august there is an average of 3in of precipitation over 4 days.
The climate good in this location september. The thermometer averaged maximum of 85°F. On average, the recorded minimum temperature is 77°F. Thus, the mean temperature average on this month of september in Cotonou is 81°F. Note that seasonal normals are in contrast with those observed in Cotonou in september with a maximum record of 90°F in 2018 and a minimum record of 70°F in 2020. You can hope to have about 5 days with temperatures over 86°F, or 17 of time.
Day length in Cotonou in september is 12:09. The sun rises at 06:41 and sets at 18:50.
With proper weather, this month is okay (but not good) to go in Cotonou in Benin.
Seasonal average climate and temperature of Cotonou in september
Check below seasonal norms These datas are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 81°F | ||||
| Highest temperature | 85°F | ||||
| Lowest temperature | 77°F | ||||
| Highest record temperature | 90°F (2018) | ||||
| Lowest record temperature | 70°F (2020) | ||||
| Number of days at +86°F | 5 day(s) (17%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 79°F | ||||
| Lowest sea temperature | 76°F | ||||
| Highest sea temperature | 82°F | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 77°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 6.3in | ||||
| Number of days with rainfall | 9 day(s) (32%) | ||||
| Record daily rainfall | 2.5in (2019) | ||||
| Other climate data | |||||
| Humidity | 89% | ||||
| Visibility | 9.48km | ||||
| Cloud cover | 52% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:41 | ||||
| Time of sunset | 18:50 | ||||
| Length of day | 12:09 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Cotonou in september 2024:
72°F to 86°F
72°F to 90°F
72°F to 86°F
72°F to 92°F
72°F to 90°F
72°F to 90°F
74°F to 77°F
72°F to 90°F
72°F to 92°F
74°F to 88°F
72°F to 86°F
74°F to 88°F
74°F to 85°F
74°F to 77°F
72°F to 85°F
72°F to 90°F
74°F to 86°F
74°F to 85°F
74°F to 85°F
74°F to 86°F
76°F to 86°F
76°F to 85°F
74°F to 86°F
74°F to 86°F
76°F to 86°F
74°F to 88°F
74°F to 92°F
74°F to 86°F
74°F to 86°F
74°F to 88°F
Map: other cities in Benin in september
Cities near Cotonou:
| Lokossa in september | tolerable weather |
| Bohicon in september | tolerable weather |
| Save in september | tolerable weather |
| Tchaourou in september | tolerable weather |
| Natitingou in september | tolerable weather |
| Kandi in september | good weather |
Click over cities on the map for information about the weather in september.
Cotonou
perfect weather
good
tolerable
bad
very bad
Weather data for Cotonou in september:
Weather data for Cotonou for september are derived from an average of the weather forecast since 2009 in Cotonou. There is a margin of error and these forecasts are to be considered as general information only. The weather in Cotonou can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Cotonú.