Colombo
September
Weather in Colombo for September 2025
Your guide to Colombo weather in September - trends and predictions
In general, the average temperature in Colombo at the beginning of September is 27.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 28.4 °C by the end of September.
Colombo experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 611.9 mm.
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
28°/25°
Temperatures
20 km/h
Avg max wind
84 %
Avg humidity
Colombo in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  27° | 3 27° | 4 28° | 5 28° | 6 28° | 7 28° |
| 8 28° | 9 28° | 10 27° | 11 27° | 12  28° | 13  29° | 14  28° |
| 15 28° | 16  29° | 17 29° | 18 29° | 19 29° | 20 27° | 21 28° |
| 22 28° | 23 28° | 24 29° | 25 28° | 26 29° | 27 28° | 28 28° |
| 29 29° | 30 28° |
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Temperatures trend during September in Colombo
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate or heavy rain shower | 27° /24° | 33.9 mm | 6 | |
| 2 Sept. | Torrential rain shower | 27° /24° | 41.4 mm | 6 | |
| 3 Sept. | Torrential rain shower | 27° /24° | 48.3 mm | 6 | |
| 4 Sept. | Moderate or heavy rain shower | 28° /24° | 27.1 mm | 6 | |
| 5 Sept. | Torrential rain shower | 28° /25° | 38.6 mm | 6 | |
| 6 Sept. | Moderate or heavy rain shower | 28° /25° | 34.3 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 28° /24° | 34.2 mm | 6 | |
| 8 Sept. | Moderate or heavy rain shower | 28° /24° | 28.3 mm | 6 | |
| 9 Sept. | Moderate or heavy rain shower | 28° /24° | 35.3 mm | 6 | |
| 10 Sept. | Moderate or heavy rain shower | 27° /24° | 28 mm | 6 | |
| 11 Sept. | Torrential rain shower | 27° /24° | 31.4 mm | 6 | |
| 12 Sept. | Cloudy | 28° /24° | 3.6 mm | 6 | |
| 13 Sept. | Overcast | 29° /25° | 5.2 mm | 7 | |
| 14 Sept. | Partly cloudy | 28° /24° | 9.9 mm | 7 | |
| 15 Sept. | Cloudy | 28° /25° | 8.3 mm | 6 | |
| 16 Sept. | Patchy rain possible | 29° /25° | 10.3 mm | 6 | |
| 17 Sept. | Light rain shower | 29° /25° | 12.1 mm | 6 | |
| 18 Sept. | Light rain shower | 29° /24° | 10.9 mm | 6 | |
| 19 Sept. | Light rain shower | 29° /24° | 10.4 mm | 6 | |
| 20 Sept. | Moderate or heavy rain shower | 27° /24° | 21.7 mm | 6 | |
| 21 Sept. | Light rain shower | 28° /24° | 9.6 mm | 6 | |
| 22 Sept. | Light rain shower | 28° /24° | 8.9 mm | 6 | |
| 23 Sept. | Light rain shower | 28° /25° | 8.9 mm | 6 | |
| 24 Sept. | Patchy rain possible | 29° /25° | 16.7 mm | 6 | |
| 25 Sept. | Light rain shower | 28° /25° | 16.7 mm | 6 | |
| 26 Sept. | Light rain shower | 29° /24° | 14.1 mm | 6 | |
| 27 Sept. | Light rain shower | 28° /25° | 21.7 mm | 6 | |
| 28 Sept. | Light rain shower | 28° /24° | 15.3 mm | 6 | |
| 29 Sept. | Light rain shower | 29° /24° | 14.4 mm | 7 | |
| 30 Sept. | Light rain shower | 28° /24° | 12.3 mm | 6 | |
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Important Notice
Our weather forecast for Colombo in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Colombo forecast closer to your planned date for the most up-to-date weather information.
Colombo in September - FAQ
What are the expected maximum and minimum temperatures in Colombo during September?
During September, expect a variety of temperatures with highs around 28° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Colombo during September?
Significant rainfall exceeding 611.9 mm is expected in Colombo during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Colombo during September?
The average wind speed in Colombo during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Colombo
Explore the daily rainfall trends and prepare for Colombos September weather 💧
UV exposure in Colombo during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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