Average annual temperature is 26.4 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 35 days
Number of rainy days: 330 days
Look at detailed online map of Weliamuna
* Weather data for Weliamuna 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) | 31.6 | 33.5 | 35.0 | 36.3 | 32.2 | 31.1 | 30.3 | 31.5 | 30.6 | 31.6 | 32.1 | 31.7 |
| Average daytime temperature (°C) | 30.0 | 31.3 | 32.8 | 32.7 | 30.4 | 29.8 | 29.3 | 30.3 | 28.8 | 29.6 | 30.2 | 30.2 |
| Average temperature (°C) | 25.0 | 26.0 | 27.2 | 27.3 | 27.3 | 27.1 | 26.9 | 27.1 | 25.8 | 25.5 | 25.4 | 26.0 |
| Average night temperature (°C) | 21.1 | 21.8 | 23.3 | 23.6 | 24.8 | 24.7 | 24.8 | 24.6 | 23.7 | 22.9 | 22.8 | 23.3 |
| Absolute minimum temperature (°C) | 19.0 | 19.9 | 22.4 | 22.4 | 23.1 | 23.1 | 22.9 | 23.3 | 22.5 | 21.6 | 22.1 | 22.6 |
| 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 | 12.5 | 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) | 9.5 | 9.7 | 10.7 | 10.3 | 9.3 | 10.1 | 9.8 | 10.9 | 8.0 | 8.1 | 7.7 | 8.0 |
| Precipitation (mm) | 70 | 102 | 120 | 166 | 230 | 200 | 129 | 75 | 397 | 358 | 604 | 359 |
| Sunny days | 17 | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Rainy days | 14 | 15 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Weliamuna is at