Average annual temperature is 25.7 °C
Absolute maximum temperature: 32.8 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 13 days
Number of rainy days: 352 days
Look at detailed online map of Dewamulla
* Weather data for Dewamulla 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) | 31.4 | 31.9 | 32.1 | 32.8 | 31.4 | 30.5 | 30.2 | 30.4 | 30.3 | 31.0 | 31.0 | 31.6 |
| Average daytime temperature (°C) | 29.6 | 30.0 | 30.6 | 31.3 | 29.8 | 29.3 | 29.1 | 29.6 | 28.6 | 29.1 | 29.6 | 29.8 |
| Average temperature (°C) | 24.7 | 25.3 | 25.9 | 26.5 | 26.5 | 26.2 | 26.2 | 26.5 | 25.2 | 25.1 | 25.2 | 25.4 |
| Average night temperature (°C) | 20.7 | 21.8 | 22.5 | 23.3 | 24.1 | 23.7 | 23.7 | 23.8 | 23.1 | 22.8 | 22.5 | 22.6 |
| Absolute minimum temperature (°C) | 18.5 | 20.9 | 21.1 | 21.9 | 22.7 | 22.7 | 22.0 | 23.0 | 22.4 | 21.8 | 21.9 | 21.9 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 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) | 9.6 | 9.7 | 10.1 | 10.1 | 8.1 | 8.6 | 9.1 | 10.6 | 6.6 | 6.6 | 7.1 | 7.5 |
| Precipitation (mm) | 125 | 127 | 213 | 204 | 248 | 374 | 350 | 162 | 632 | 652 | 669 | 425 |
| Sunny days | 8 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Rainy days | 23 | 24 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dewamulla is at