Average annual temperature is 26.1 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: 19.3 °C
Number of sunny days: 34 days
Number of rainy days: 331 days
Look at detailed online map of Wattemulla
* Weather data for Wattemulla 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) | 31.5 | 34.2 | 34.3 | 35.8 | 32.8 | 31.2 | 30.4 | 31.7 | 30.7 | 31.3 | 31.7 | 31.7 |
| Average daytime temperature (°C) | 30.0 | 31.3 | 32.7 | 33.2 | 30.7 | 29.9 | 29.3 | 30.6 | 28.6 | 29.4 | 30.1 | 29.9 |
| Average temperature (°C) | 25.0 | 25.8 | 26.9 | 27.2 | 26.9 | 26.4 | 26.2 | 26.8 | 25.3 | 25.3 | 25.3 | 25.8 |
| Average night temperature (°C) | 21.1 | 21.6 | 23.1 | 23.5 | 24.5 | 23.9 | 23.7 | 24.0 | 23.1 | 22.9 | 22.7 | 23.2 |
| Absolute minimum temperature (°C) | 19.3 | 19.3 | 22.3 | 22.4 | 23.0 | 22.5 | 22.3 | 23.0 | 22.2 | 22.0 | 21.7 | 22.4 |
| 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 | 12.5 | 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) | 9.3 | 9.4 | 10.2 | 9.9 | 8.8 | 8.9 | 9.1 | 10.8 | 6.9 | 6.8 | 7.1 | 7.7 |
| Precipitation (mm) | 102 | 110 | 176 | 161 | 191 | 209 | 242 | 63 | 409 | 443 | 601 | 303 |
| Sunny days | 15 | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 4 |
| Rainy days | 16 | 15 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Wattemulla is at