Cotonou, Benin Weather
Cotonou hourly forecast: next 24 hours
Today's high of 78°F (26°C) is about 3°F (2°C) below the typical September high of 81°F (27°C).
Current conditions in detail
Cotonou weather tomorrow (Thursday, September 17)
Tomorrow in Cotonou looks sunny, with a high of 78° and an overnight low of 77°. Precipitation chance is modest at 29%. Winds top out near 18 mph, and the UV index reaches 10 (very high).
Cotonou 14-day forecast
About the weather in Cotonou
Temperature barely moves in Cotonou - 3°C between the average March and the average August. Rainfall does the work instead: 8.6 inches (219 mm) in June against 19 mm (0.7 in) in December.
Cotonou weather: quick facts
- Hottest month: March - highs near 87°F (30°C)
- Coldest month: August - highs near 80°F (26°C)
- Decade extremes (2015-2024): 96°F (35°C) high · 69°F (21°C) low
- Wettest month: June (25 rainy days) · Sunniest: December (10.5 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 3°C between the average warmest and coolest month · day to night: 3°C
- Months averaging 30°C or hotter: 5
- Average humidity: 83%
Temperatures through the year
Average highs hold at or above 30°C for 5 months of the year, December through April being the unbroken run. August sits at the other end of the year: 80°F (26°C) by day, 75°F (24°C) at night. March is the warm end of the year, averaging 87°F (30°C) by day and 81°F (27°C) overnight. The gridded 2015-2024 daily record for this location tops out at 96°F (35°C) and bottoms at 69°F (21°C) - decade extremes, not all-time station records. Relative humidity averages 83% across the year, more humid than 94% of the 3496 cities in our dataset - enough that summer afternoons feel hotter than the thermometer says, which is what the dew point converter is for.
Rain, sun and snow
Sunshine averages 9.7 hours a day over the year, peaking in December at 10.5 hours. 2 months average under 20 mm of rain, the longest unbroken stretch running December through January.
Season by season
March through May
Through March through May, Cotonou sits firmly in the heat: 86°F (30°C) by day, 80°F (27°C) after dark, and rain falls on around 50 of the 90 days.
June through August
Through June through August, Cotonou runs hot: 81°F (27°C) by day, 76°F (25°C) after dark, and rain falls on around 58 of the 90 days.
September through November
Through September through November, Cotonou sits firmly in the heat: 83°F (28°C) by day, 78°F (25°C) after dark, and rain falls on around 65 of the 90 days.
December through February
Through December through February, Cotonou sits firmly in the heat: 87°F (30°C) by day, 78°F (26°C) after dark, and expect showers on roughly 21 days across the season. Daylight is generous - around 10.4 hours of sun a day.
Average temperatures in Cotonou by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 87° | 77° | 5 | 0.8 in | 10.3 h/day | 79% |
| February | 87° | 79° | 8 | 1.3 in | 10.4 h/day | 81% |
| March | 87° | 81° | 15 | 2.8 in | 9.8 h/day | 82% |
| April | 87° | 81° | 15 | 2.7 in | 9.9 h/day | 81% |
| May | 85° | 80° | 21 | 5.9 in | 9.7 h/day | 82% |
| June | 82° | 77° | 25 | 8.6 in | 8.3 h/day | 85% |
| July | 80° | 76° | 18 | 4.4 in | 9.4 h/day | 86% |
| August | 80° | 75° | 15 | 3.0 in | 9.6 h/day | 86% |
| September | 81° | 76° | 22 | 5.0 in | 8.9 h/day | 86% |
| October | 83° | 77° | 24 | 6.0 in | 9.3 h/day | 85% |
| November | 85° | 79° | 19 | 2.6 in | 10.4 h/day | 83% |
| December | 87° | 78° | 7 | 0.7 in | 10.5 h/day | 79% |