Average annual temperature is 25.9 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: 19.6 °C
Number of sunny days: 23 days
Number of rainy days: 342 days
Look at detailed online map of Gampaha Aluthgama West
* Weather data for Gampaha Aluthgama 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) | 31.5 | 34.4 | 33.8 | 34.0 | 32.1 | 30.7 | 30.3 | 30.9 | 30.7 | 31.5 | 31.6 | 32.1 |
| Average daytime temperature (°C) | 30.2 | 31.3 | 31.7 | 32.3 | 30.4 | 29.7 | 29.3 | 30.0 | 28.6 | 29.5 | 30.0 | 30.2 |
| Average temperature (°C) | 25.1 | 25.8 | 26.3 | 26.8 | 26.7 | 26.2 | 26.2 | 26.5 | 25.2 | 25.2 | 25.2 | 25.6 |
| Average night temperature (°C) | 21.3 | 21.6 | 22.6 | 23.1 | 24.1 | 23.5 | 23.5 | 23.6 | 23.0 | 22.7 | 22.4 | 22.8 |
| Absolute minimum temperature (°C) | 19.6 | 19.7 | 21.9 | 21.5 | 22.7 | 22.2 | 22.1 | 22.6 | 22.2 | 21.7 | 21.7 | 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) | 11.8 | 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) | 9.2 | 9.7 | 10.2 | 10.1 | 8.3 | 8.5 | 9.4 | 10.8 | 6.5 | 7.0 | 7.1 | 7.4 |
| Precipitation (mm) | 136 | 120 | 183 | 217 | 226 | 326 | 277 | 120 | 566 | 613 | 557 | 404 |
| Sunny days | 11 | 9 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| Rainy days | 20 | 19 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Gampaha Aluthgama West is at