Cotonou weather in May
May in Cotonou: sweltering, rainy, with clean air — a good time to visit.
#9 of 12 months in Cotonou · #505 of 604 destinations to visit in May · comfort 64/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Cotonou climate normals — May
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 80°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 123 mm / 4.8 in | 🌧 rainy |
| Rainy days | 20 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 12.4 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Cotonou in May — FAQ
- Is May a good time to visit Cotonou?
- May in Cotonou: sweltering, rainy, with clean air — a good time to visit. It ranks #9 of 12 months for Cotonou on SeasonMap's comfort score (64/100).
- What is the weather like in Cotonou in May?
- In May, Cotonou averages a daily high of 29.6°C and a low of 26.4°C, with about 122.9 mm of rain over roughly 19.8 rainy days.
- What is the air quality in Cotonou in May?
- Cotonou has a mean US Air Quality Index of about 44 in May.