Average annual temperature is 26.9 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: 19.9 °C
Number of sunny days: 41 days
Number of rainy days: 324 days
Look at detailed online map of Galwetiya
* Weather data for Galwetiya 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) | 29.4 | 30.5 | 32.9 | 35.0 | 35.4 | 36.8 | 38.7 | 39.3 | 35.8 | 32.0 | 31.1 | 30.8 |
| Average daytime temperature (°C) | 27.9 | 28.5 | 30.0 | 31.9 | 32.7 | 35.4 | 35.7 | 37.6 | 33.3 | 30.6 | 29.6 | 28.7 |
| Average temperature (°C) | 24.3 | 24.7 | 25.7 | 26.9 | 27.6 | 29.1 | 29.3 | 30.2 | 27.8 | 25.9 | 25.3 | 25.2 |
| Average night temperature (°C) | 21.7 | 22.2 | 22.6 | 23.4 | 24.1 | 24.9 | 24.8 | 25.2 | 24.6 | 23.2 | 23.0 | 23.1 |
| Absolute minimum temperature (°C) | 19.9 | 20.6 | 21.8 | 22.1 | 22.8 | 23.9 | 23.5 | 24.1 | 23.2 | 22.3 | 22.1 | 22.3 |
| 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 | 12.5 | 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) | 9.0 | 9.0 | 9.4 | 10.0 | 9.5 | 10.5 | 9.6 | 10.9 | 9.6 | 8.3 | 7.3 | 7.1 |
| Precipitation (mm) | 117 | 173 | 128 | 98 | 166 | 89 | 71 | 52 | 121 | 397 | 504 | 430 |
| Sunny days | 7 | 7 | 3 | 1 | 8 | 4 | 4 | 4 | 3 | 0 | 0 | 0 |
| Rainy days | 24 | 21 | 28 | 29 | 23 | 26 | 27 | 27 | 27 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Galwetiya is at