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 an exceptionally high level of rainfall in September, with more than 24 rainy days on average.
Is September a good time to visit Colombo? check out the best time to travel to Colombo page.
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4
Dry days
26
Rainy days
0
Snow days
27°/24°
Temperatures
19 km/h
Avg max wind
85 %
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 27° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Colombo during September?
Significant rainfall exceeding 778.7 mm is expected in Colombo during September, occurring over more than 26 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 19 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Colombo in September?
As you prepare for your trip to Colombo in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Colombo, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
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