Weather in Sri Lanka for September 2027
In general, the average temperature in Sri Lanka at the beginning of September is 28.2 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 28.3 °C by the end of September.
Sri Lanka experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 493 mm.
Is September a good time to visit Sri Lanka? check out the best time to travel to Sri Lanka page.
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Sri Lanka Weather September
What’s the Weather Like in Sri Lanka This September?
Temperatures trend during September in Sri Lanka
September weather in Sri Lanka day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate rain | 28° /25° | 19.8 mm | 6 | |
| 2 Sept. | Moderate rain | 28° /25° | 22.3 mm | 6 | |
| 3 Sept. |  Heavy rain | 28° /24° | 28.4 mm | 6 | |
| 4 Sept. | Moderate rain | 28° /24° | 16.6 mm | 6 | |
| 5 Sept. | Moderate rain | 29° /25° | 22.6 mm | 5 | |
| 6 Sept. | Moderate rain | 29° /25° | 19 mm | 5 | |
| 7 Sept. | Moderate rain | 29° /25° | 20 mm | 6 | |
| 8 Sept. | Moderate rain | 29° /25° | 16 mm | 5 | |
| 9 Sept. | Moderate rain | 29° /25° | 19.9 mm | 6 | |
| 10 Sept. | Moderate rain | 28° /25° | 17 mm | 5 | |
| 11 Sept. | Moderate rain | 28° /25° | 18.6 mm | 5 | |
| 12 Sept. |  Light rain | 29° /25° | 6.5 mm | 5 | |
| 13 Sept. | Moderate rain | 29° /25° | 10.7 mm | 5 | |
| 14 Sept. | Moderate rain | 29° /25° | 12.2 mm | 5 | |
| 15 Sept. | Moderate rain | 28° /25° | 14.6 mm | 5 | |
| 16 Sept. | Moderate rain | 28° /24° | 16.8 mm | 5 | |
| 17 Sept. | Moderate rain | 29° /25° | 15.7 mm | 6 | |
| 18 Sept. | Moderate rain | 28° /25° | 13 mm | 6 | |
| 19 Sept. | Moderate rain | 29° /25° | 14.9 mm | 5 | |
| 20 Sept. | Heavy rain | 27° /24° | 28.1 mm | 5 | |
| 21 Sept. | Moderate rain | 28° /24° | 10 mm | 6 | |
| 22 Sept. | Moderate rain | 28° /24° | 11 mm | 5 | |
| 23 Sept. | Moderate rain | 28° /24° | 13.9 mm | 5 | |
| 24 Sept. | Heavy rain | 28° /25° | 25.6 mm | 5 | |
| 25 Sept. | Moderate rain | 28° /25° | 18.5 mm | 5 | |
| 26 Sept. | Moderate rain | 28° /24° | 17 mm | 5 | |
| 27 Sept. | Moderate rain | 29° /25° | 15.3 mm | 6 | |
| 28 Sept. | Moderate rain | 28° /24° | 12 mm | 6 | |
| 29 Sept. | Light rain | 29° /25° | 8.7 mm | 6 | |
| 30 Sept. | Light rain | 29° /25° | 8.6 mm | 5 | |
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Guide for Sri Lanka in September
In September, Sri Lanka experiences varying weather conditions at the beginning and end of the month.
At the start of September, the weather in Sri Lanka is generally warm and humid, with temperatures ranging from 27° to 30° in the coastal areas and slightly cooler temperatures in the central highlands.
The coastal regions may also experience occasional short bursts of rain, particularly in the evenings, due to the inter-monsoon period.
Towards the end of September, the weather in Sri Lanka begins to transition as the southwest monsoon season approaches. During this time, the country experiences increased rainfall, particularly in the southwestern regions, with temperatures ranging from 25° to 28°.
The central highlands also receive a fair amount of rainfall, making it a great time to witness the lush greenery and vibrant landscapes.
Overall, September in Sri Lanka offers a mix of warm temperatures, occasional rain showers, and lush greenery, making it an ideal time to explore the diverse landscapes and cultural attractions that the country has to offer.