Climate in Colombo — Annual Weather Overview
Colombo has a tropical climate — hot and humid year-round with a distinct wet season. The hottest month is February (average high 31.0°C) and the coolest is September (28.3°C). Temperatures are consistent year-round, with highs ranging only 2.7°C between the warmest and coolest months. Annual rainfall totals around 2912mm. November is the wettest month at 424.8mm, while February averages just 41.2mm. Average daily sunshine is 9.3 hours.
**Spring (March, April, May):** average highs 30.3°C, 648mm rain. **Summer (June, July, August):** average highs 28.7°C, 766mm rain. **Autumn (September, October, November):** average highs 28.5°C, 1127mm rain. **Winter (December, January, February):** average highs 30.1°C, 372mm rain.
Colombo — Monthly Temperatures
Colombo — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Colombo stays reasonable all year.
Colombo weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 30.0°C | 22.6°C | 115.3mm | 10.1h | 15 | 9/10 |
| February | 31.0°C | 23.1°C | 41.2mm | 11.0h | 9 | 10/10 |
| March | 30.8°C | 23.9°C | 111.6mm | 10.6h | 20 | 9/10 |
| April | 30.6°C | 24.5°C | 150.7mm | 10.5h | 23 | 9/10 |
| May | 29.6°C | 25.4°C | 385.3mm | 8.4h | 30 | 8/10 |
| June | 28.9°C | 25.3°C | 294.4mm | 9.5h | 29 | 8/10 |
| July | 28.6°C | 25.2°C | 234.1mm | 9.3h | 28 | 8/10 |
| August | 28.5°C | 25.1°C | 237.3mm | 9.8h | 28 | 8/10 |
| September | 28.3°C | 24.7°C | 348.7mm | 8.3h | 29 | 8/10 |
| October | 28.4°C | 24.2°C | 353.7mm | 8.5h | 29 | 8/10 |
| November | 28.7°C | 23.3°C | 424.8mm | 7.6h | 23 | 8/10 |
| December | 29.3°C | 23.0°C | 215.0mm | 8.6h | 21 | 8/10 |
For the full verdict on when to go, see the best time to visit Colombo and the Colombo rainy season guide. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Colombo have?
Colombo has a tropical climate — hot and humid year-round with a distinct wet season. Average highs range from 28.3°C in September to 31.0°C in February.
What is the hottest month in Colombo?
February is the hottest month in Colombo, with average highs of 31.0°C and lows of 23.1°C.
What is the coldest month in Colombo?
September is the coolest month, with average highs of 28.3°C and lows of 22.6°C.
What is the wettest month in Colombo?
November is the wettest month, averaging 424.8mm of rainfall over around 23 rainy days.
When is rainy season in Colombo?
Rainy season in Colombo runs March to January, when rainfall is significantly higher than the rest of the year. Full rainy season guide →
How much rain does Colombo get per year?
Colombo receives around 2912mm of rain per year. The driest month is February (41.2mm).
When is the best time to visit Colombo?
The best time to visit Colombo is All year. See the full month-by-month guide →
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Trip essentials for Colombo
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.