Polonnaruwa Weather in May
What's the weather like in Polonnaruwa (North Central) in May 2026?
The climate in Polonnaruwa during May can be summarized as very hot, humid and a little damp.
May is in the spring in Polonnaruwa and is typically the warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 25°C (77°F) is normal.
| Daytime temperature | 32.8°C 91°F |
|---|---|
| Nightly temperature | 25°C 77°F |
| Average temperature | 28.9°C 84°F |
| Daily sunshine | 7.1 hrs |
| Avg rainfall | 91 mm 3.6 ins |
| Rainy days | 8 days |
| Sea temperature | 29.8°C 85.6°F |
| Humidity | 74% |
| Windspeed | 13kph 8 mph |
On average May is the 5th driest month of the year in Polonnaruwa with around 91mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 hours of sunshine per day.
May temperatures in Polonnaruwa
May rainfall
May 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 May 2025.
Other monthly averages
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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