Average annual temperature is 26.0 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: 19.4 °C
Number of sunny days: 28 days
Number of rainy days: 337 days
Look at detailed online map of Galgamuwa West
* Weather data for Galgamuwa 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) | 31.3 | 33.8 | 34.4 | 35.4 | 32.6 | 30.9 | 30.3 | 31.4 | 30.6 | 31.3 | 31.2 | 32.2 |
| Average daytime temperature (°C) | 29.8 | 31.0 | 32.5 | 33.1 | 30.5 | 29.7 | 29.1 | 30.3 | 28.6 | 29.3 | 30.0 | 29.9 |
| Average temperature (°C) | 25.0 | 25.8 | 26.7 | 27.1 | 26.8 | 26.3 | 26.1 | 26.6 | 25.2 | 25.2 | 25.3 | 25.7 |
| Average night temperature (°C) | 21.2 | 21.5 | 23.0 | 23.4 | 24.4 | 23.8 | 23.5 | 23.8 | 23.1 | 22.9 | 22.7 | 23.1 |
| Absolute minimum temperature (°C) | 19.5 | 19.4 | 22.1 | 22.2 | 22.9 | 22.5 | 22.0 | 22.9 | 22.2 | 21.7 | 21.8 | 21.7 |
| 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) | 9.3 | 9.6 | 10.2 | 10.0 | 8.8 | 8.8 | 9.1 | 10.8 | 6.9 | 6.9 | 7.1 | 7.7 |
| Precipitation (mm) | 115 | 105 | 182 | 154 | 192 | 226 | 262 | 69 | 457 | 519 | 600 | 343 |
| Sunny days | 14 | 10 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 |
| Rainy days | 17 | 18 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Galgamuwa West is at