Average annual temperature is 27.3 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: 18.0 °C
Number of sunny days: 67 days
Number of rainy days: 298 days
Look at detailed online map of Polonnaruwa
* Weather data for Polonnaruwa Sri Lanka is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.5 | 30.7 | 34.0 | 36.5 | 37.2 | 37.0 | 38.2 | 39.2 | 36.8 | 34.5 | 31.1 | 31.1 |
| Average daytime temperature (°C) | 28.0 | 29.0 | 31.0 | 33.8 | 33.4 | 35.5 | 34.9 | 37.3 | 34.1 | 31.5 | 29.7 | 28.8 |
| Average temperature (°C) | 24.0 | 24.7 | 26.3 | 28.0 | 28.5 | 30.1 | 29.7 | 30.4 | 28.6 | 26.4 | 25.5 | 25.3 |
| Average night temperature (°C) | 20.7 | 21.4 | 22.8 | 24.1 | 25.4 | 26.7 | 26.3 | 26.0 | 25.3 | 23.5 | 23.1 | 22.9 |
| Absolute minimum temperature (°C) | 18.0 | 19.0 | 21.6 | 22.7 | 23.7 | 25.6 | 25.0 | 24.8 | 23.9 | 22.4 | 22.1 | 21.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.5 | 12.4 | 12.2 | 11.9 | 11.8 | 11.7 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.0 | 9.0 | 10.0 | 10.3 | 9.2 | 10.8 | 9.7 | 10.9 | 9.4 | 8.6 | 7.3 | 6.9 |
| Precipitation (mm) | 142 | 127 | 115 | 121 | 132 | 18 | 20 | 48 | 85 | 321 | 549 | 374 |
| Sunny days | 8 | 6 | 6 | 6 | 9 | 10 | 9 | 11 | 2 | 0 | 0 | 0 |
| Rainy days | 23 | 22 | 25 | 24 | 22 | 20 | 22 | 20 | 28 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Polonnaruwa is at