Polonnaruwa Weather in September
What's the weather like in Polonnaruwa (North Central) in September 2025?
The climate in Polonnaruwa during September can be summarized as very hot, humid and a little damp.
September is in the fall / autumn in Polonnaruwa and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 24°C (75°F) is normal.
| Daytime temperature | 32.2°C 89.9°F |
|---|---|
| Nightly temperature | 24.1°C 75.3°F |
| Average temperature | 28.1°C 82.6°F |
| Daily sunshine | 6.8 hrs |
| Avg rainfall | 98 mm 3.9 ins |
| Rainy days | 9 days |
| Sea temperature | 28.8°C 83.8°F |
| Humidity | 72% |
| Windspeed | 14kph 9 mph |
On average September is the 6th driest month of the year in Polonnaruwa with around 98mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
September temperatures in Polonnaruwa
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 Polonnaruwa in September 2025.
Other monthly averages
Best places to visit in September
Polonnaruwa weather stats
| Hottest month: | May | 32.6°C 90.7°F |
|---|---|---|
| Driest month: | June | 54mm 2.1ins |
| Sunniest month: | March | 9hrs |
| Coldest month: | January | 28.9°C 84°F |
| Wettest month: | November | 309mm 12.2ins |
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