Colombo Weather in September
What's the weather like in Colombo (Paraná) in September 2025?
The climate in Colombo during September can be summarized as mild and wet.
September is in the spring in Colombo and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 11°C (51°F) is normal.
| Daytime temperature | 21.2°C 70.2°F |
|---|---|
| Nightly temperature | 10.8°C 51.4°F |
| Average temperature | 16°C 60.8°F |
| Daily sunshine | 4.2 hrs |
| Avg rainfall | 120 mm 4.7 ins |
| Rainy days | 19 days |
| Sea temperature | 19.4°C 66.9°F |
| Humidity | 81% |
| Windspeed | 9.4kph 6 mph |
On average September is the 6th wettest month of the year in Colombo with around 120mm 4.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.2 hours of sunshine per day.
September temperatures in Colombo
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Colombo in September 2025.
Other monthly averages
Best places to visit in September
Colombo weather stats
| Hottest month: | February | 25.5°C 77.9°F |
|---|---|---|
| Driest month: | August | 73mm 2.9ins |
| Sunniest month: | July | 5.1hrs |
| Coldest month: | June | 18.2°C 64.8°F |
| Wettest month: | January | 191mm 7.5ins |
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