Average annual temperature is 27.2 °C
Absolute maximum temperature: 39.6 °C
Absolute minimum temperature: 16.6 °C
Number of sunny days: 71 days
Number of rainy days: 294 days
Look at detailed online map of Rotalawela
* Weather data for Rotalawela 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) | 29.2 | 30.5 | 33.0 | 35.8 | 37.2 | 37.6 | 38.2 | 39.6 | 38.0 | 34.3 | 31.2 | 30.8 |
| Average daytime temperature (°C) | 28.1 | 28.9 | 30.4 | 33.1 | 33.7 | 36.4 | 35.5 | 37.7 | 34.8 | 31.5 | 29.8 | 28.9 |
| Average temperature (°C) | 23.8 | 24.5 | 25.7 | 27.3 | 28.2 | 30.8 | 30.2 | 30.4 | 28.5 | 26.0 | 25.3 | 25.1 |
| Average night temperature (°C) | 20.0 | 21.0 | 22.2 | 23.0 | 24.1 | 26.4 | 25.8 | 24.6 | 24.2 | 22.8 | 22.6 | 22.7 |
| Absolute minimum temperature (°C) | 16.6 | 18.5 | 20.8 | 22.1 | 22.2 | 25.1 | 23.9 | 23.1 | 22.3 | 21.4 | 22.1 | 21.4 |
| 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) | 11.7 | 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) | 8.4 | 9.1 | 9.6 | 10.2 | 9.5 | 10.8 | 9.7 | 10.7 | 8.6 | 8.5 | 7.3 | 6.7 |
| Precipitation (mm) | 168 | 170 | 138 | 97 | 132 | 17 | 13 | 43 | 70 | 402 | 520 | 419 |
| Sunny days | 6 | 5 | 4 | 6 | 12 | 12 | 16 | 8 | 1 | 1 | 0 | 0 |
| Rainy days | 25 | 23 | 27 | 24 | 19 | 18 | 15 | 23 | 29 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rotalawela is at