Average annual temperature is 26.3 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 52 days
Number of rainy days: 313 days
Look at detailed online map of Galweheragama
* Weather data for Galweheragama 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) | 30.8 | 32.1 | 35.2 | 36.1 | 34.1 | 32.7 | 32.8 | 35.4 | 32.3 | 32.6 | 31.9 | 31.2 |
| Average daytime temperature (°C) | 29.1 | 30.3 | 32.7 | 33.7 | 31.5 | 31.1 | 30.4 | 33.5 | 29.7 | 30.2 | 30.2 | 29.5 |
| Average temperature (°C) | 24.5 | 25.4 | 27.0 | 27.5 | 27.1 | 27.2 | 26.8 | 28.1 | 25.9 | 25.5 | 25.4 | 25.6 |
| Average night temperature (°C) | 21.0 | 21.4 | 23.0 | 23.3 | 24.5 | 24.5 | 24.2 | 24.7 | 23.5 | 22.7 | 22.7 | 23.2 |
| Absolute minimum temperature (°C) | 19.1 | 19.0 | 21.9 | 21.9 | 23.1 | 23.3 | 22.6 | 23.5 | 22.6 | 21.6 | 21.6 | 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.5 | 12.4 | 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 | 9.9 | 10.5 | 10.1 | 8.9 | 10.1 | 9.4 | 10.9 | 8.3 | 8.0 | 7.5 | 8.1 |
| Precipitation (mm) | 55 | 63 | 98 | 169 | 169 | 65 | 97 | 26 | 146 | 355 | 557 | 271 |
| Sunny days | 16 | 13 | 4 | 5 | 1 | 1 | 2 | 6 | 0 | 0 | 1 | 3 |
| Rainy days | 15 | 15 | 27 | 25 | 30 | 29 | 29 | 25 | 30 | 31 | 29 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Galweheragama is at