Colombo · AutumnMonth summary
Colombo weather in September
✅ Good
🌡️ Temperature min / max
25°C – 29°C
🌧 Rainy days
92% of days
☀️ Sunshine
10.1h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.0/10
📅 📅 Best month
February (7.8/10)
Quick decision
Should you visit Colombo 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: Favourable conditions in September (7.0/10). February scores higher but the gap is small.
By trip type
Colombo 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 Colombo is often underrated: 29°C, golden light and declining crowds. An interesting window. With 92% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. February (7.8/10) is significantly better if possible.
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All months for Colombo
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 23°C | 30°C | 43% | 3.3 | 11.2h | 7.7/10 |
| 🌤️ February | 23°C | 31°C | 37% | 1.8 | 11.7h | 7.8/10 |
| 🌤️ March | 24°C | 31°C | 59% | 3.3 | 11.6h | 7.3/10 |
| ⛅ April | 25°C | 31°C | 82% | 5.0 | 11.1h | 7.0/10 |
| 🌧️ May | 26°C | 30°C | 96% | 13.6 | 9.1h | 5.7/10 |
| 🌦️ June | 25°C | 29°C | 97% | 10.5 | 10.2h | 7.0/10 |
| 🌦️ July | 25°C | 29°C | 88% | 7.4 | 10.7h | 7.0/10 |
| 🌦️ August | 25°C | 28°C | 90% | 7.8 | 10.6h | 7.1/10 |
| 🌦️ September | 25°C | 29°C | 92% | 9.7 | 10.1h | 7.0/10 |
| 🌧️ October | 24°C | 29°C | 91% | 11.3 | 8.9h | 6.9/10 |
| 🌧️ November | 24°C | 29°C | 82% | 13.8 | 8.1h | 7.0/10 |
| 🌤️ December | 23°C | 30°C | 58% | 4.9 | 10.5h | 7.3/10 |
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, Colombo averages 29°C, 92% rainy days and 10.1h of sunshine per day. Overall weather score: 7.0/10.
See methodology →
Comparison
September vs February (best month)
The best month is February (score 7.8/10). Difference:
- 🌡️ Max temperature : +2°C
- 🌧 Rainy days : -55%
- ☀️ Sunshine : +1.6h/day
FAQ
FAQ — Colombo in September
Is September a good time to visit Colombo?
September is an acceptable time for Colombo (score 7.0/10). Conditions are decent but not optimal — consider February (7.8/10) if possible.
Does it rain a lot in Colombo in September?
Yes, 92% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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Activities & tours
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