Average annual temperature is 25.9 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: 18.8 °C
Number of sunny days: 22 days
Number of rainy days: 343 days
Look at detailed online map of Dewalegama West
* Weather data for Dewalegama West 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 | 32.8 | 32.6 | 33.8 | 32.4 | 31.4 | 30.9 | 32.5 | 30.7 | 30.9 | 31.2 | 31.1 |
| Average daytime temperature (°C) | 30.0 | 30.7 | 31.0 | 31.8 | 30.3 | 30.2 | 29.4 | 31.1 | 28.7 | 28.7 | 29.5 | 29.4 |
| Average temperature (°C) | 24.8 | 25.4 | 26.0 | 26.8 | 26.9 | 26.7 | 26.3 | 27.1 | 25.3 | 25.1 | 25.3 | 25.6 |
| Average night temperature (°C) | 21.0 | 21.7 | 22.6 | 23.3 | 24.4 | 24.2 | 23.9 | 24.1 | 23.2 | 22.9 | 22.7 | 22.8 |
| Absolute minimum temperature (°C) | 18.8 | 20.2 | 20.7 | 22.1 | 23.1 | 22.2 | 22.3 | 22.4 | 22.6 | 22.0 | 21.5 | 21.3 |
| 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 | 12.4 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.5 | 9.7 | 9.9 | 10.1 | 8.9 | 10.5 | 9.5 | 10.8 | 7.6 | 6.5 | 7.3 | 7.7 |
| Precipitation (mm) | 89 | 131 | 202 | 151 | 154 | 111 | 166 | 96 | 457 | 569 | 469 | 384 |
| Sunny days | 7 | 3 | 2 | 0 | 1 | 0 | 2 | 4 | 0 | 0 | 0 | 3 |
| Rainy days | 24 | 25 | 29 | 30 | 30 | 30 | 29 | 27 | 30 | 31 | 30 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dewalegama West is at