Weather in Cotonou in August 2025
- August is usually the coldest month of the year in Cotonou;
- August is usually the wettest month of the year in Cotonou;
Average weather
Average temperature in Cotonou in August
The expected average maximum temperature in August is +27°C with a maximum of +28°C and a minimum of +24°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +27°C to +27°C.
Is Cotonou warm or cold in August?
Cotonou is typically warm in August.
Maximum temperatures go down compared to the previous month from +27°C to +26°C. The minimum temperature also goes up from +24°C to +24°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the coldest month in Cotonou, here is the comparison with other months:
Climate in Cotonou in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +27°C | +26°C | +27°C | ||||
| Min. temperature | ||||||
| +22°C | +22°C | +23°C | ||||
| Max. temperature | ||||||
| +29°C | +29°C | +30°C | ||||
| Rainfall | ||||||
| 139 mm | 80 mm | 111 mm | ||||
| Wind | ||||||
| 4 m/s | 5 m/s | 4 m/s | ||||
| Humidity | ||||||
| 86% | 88% | 87% | ||||
| Air pressure | ||||||
| 1013 HPa | 1012 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 0 | ||||
| Cloudy days | ||||||
| 4 | 8 | 4 | ||||
| Rainy days | ||||||
| 25 | 22 | 21 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting colder in August. From +27°C in the day, the average maximum temperature lowers to +26°C. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 139 mm to 80 mm. Humidity rises from 86% to 88%. Winds are stronger in comparison to July, going up from 4 m/s to 5 m/s on average. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 5 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cotonou is gradually decreasing during August, going from 7 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Cotonou?
Climate Change over Years
The climate in Cotonou in August has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+28°C) and the highest in 2019 (+29°C). The driest year was 1998 with only 665 mm of rainfall, and the wettest year was 1988 with 1691 mm.
FAQ
Is August a good time to visit Cotonou?
Can you sunbathe in Cotonou in August?
Is Cotonou rainy in August?
Is it sunny in Cotonou in August?
Monthly weather in Cotonou
Source of the data
For this page, we’ve looked at the typical weather in Cotonou, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.