Cotonou · AutumnMonth summary
Cotonou weather in September
✅ Good
🌡️ Temperature min / max
24°C – 27°C
🌧 Rainy days
74% of days
☀️ Sunshine
10.3h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.2/10
📅 📅 Best month
January (8.3/10)
Quick decision
Should you visit Cotonou in September?
✅ Good
✅ Yes if: you're willing to accept showers in exchange for lower prices and fewer tourists.
❌ No if: you're planning 100% outdoor activities — rain is frequent.
Our take: Cotonou in September: 27°C and 10.3h of sunshine. Decent, but not the peak.
By trip type
Cotonou in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in September
🎯 Harvest season — fresh local produce at markets and restaurants Autumn in Cotonou is often underrated: 27°C, golden light and declining crowds. An interesting window. With 74% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. January (8.3/10) is significantly better if possible.
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All months for Cotonou
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ☀️ January | 26°C | 30°C | 18% | 0.6 | 10.2h | 8.3/10 |
| 🌤️ February | 27°C | 31°C | 25% | 1.0 | 10.4h | 7.9/10 |
| 🌤️ March | 27°C | 30°C | 43% | 2.1 | 10.2h | 7.6/10 |
| 🌤️ April | 27°C | 30°C | 50% | 2.4 | 10.7h | 7.5/10 |
| ⛅ May | 26°C | 30°C | 64% | 4.6 | 10.9h | 7.2/10 |
| 🌧️ June | 25°C | 28°C | 82% | 7.3 | 9.5h | 7.1/10 |
| 🌤️ July | 24°C | 27°C | 57% | 3.3 | 10.6h | 7.5/10 |
| 🌤️ August | 24°C | 26°C | 51% | 2.4 | 10.8h | 7.6/10 |
| ⛅ September | 24°C | 27°C | 74% | 4.4 | 10.3h | 7.2/10 |
| ⛅ October | 25°C | 28°C | 73% | 4.8 | 10.6h | 7.3/10 |
| ⛅ November | 26°C | 30°C | 63% | 2.0 | 11.0h | 7.4/10 |
| 🌤️ December | 26°C | 30°C | 26% | 0.7 | 10.6h | 8.2/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Cotonou averages 27°C, 74% rainy days and 10.3h of sunshine per day. Overall weather score: 7.2/10.
See methodology →
Comparison
September vs January (best month)
The best month is January (score 8.3/10). Difference:
- 🌡️ Max temperature : +3°C
- 🌧 Rainy days : -56%
- ☀️ Sunshine : -0.1h/day
FAQ
FAQ — Cotonou in September
Is September a good time to visit Cotonou?
September is an acceptable time for Cotonou (score 7.2/10). Conditions are decent but not optimal — consider January (8.3/10) if possible.
Does it rain a lot in Cotonou in September?
Yes, 74% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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Activities & tours
Activities and tours in Cotonou
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