Average annual temperature is 24.7 °C
Absolute maximum temperature: 34.0 °C
Absolute minimum temperature: 17.1 °C
Number of sunny days: 20 days
Number of rainy days: 345 days
Look at detailed online map of Welewatta
* Weather data for Welewatta 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) | 29.6 | 31.2 | 32.3 | 34.0 | 31.3 | 29.3 | 28.7 | 29.6 | 29.4 | 29.4 | 29.5 | 29.6 |
| Average daytime temperature (°C) | 28.0 | 29.1 | 30.9 | 31.6 | 28.7 | 27.8 | 27.2 | 28.5 | 27.3 | 27.7 | 28.2 | 27.9 |
| Average temperature (°C) | 23.6 | 24.4 | 25.5 | 26.0 | 25.2 | 24.8 | 24.6 | 25.1 | 24.2 | 24.4 | 24.5 | 24.5 |
| Average night temperature (°C) | 19.6 | 20.4 | 21.5 | 22.0 | 23.1 | 22.9 | 22.6 | 22.6 | 22.4 | 22.2 | 21.9 | 21.7 |
| Absolute minimum temperature (°C) | 17.1 | 19.0 | 20.5 | 20.5 | 21.8 | 21.5 | 21.6 | 21.5 | 21.3 | 21.2 | 20.7 | 20.0 |
| 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) | 9.7 | 9.4 | 10.0 | 9.9 | 8.0 | 9.3 | 8.4 | 10.7 | 6.5 | 6.6 | 7.1 | 7.3 |
| Precipitation (mm) | 60 | 109 | 93 | 108 | 193 | 185 | 275 | 144 | 429 | 589 | 558 | 290 |
| Sunny days | 10 | 6 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Rainy days | 21 | 22 | 29 | 29 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Welewatta is at