Average annual temperature is 26.8 °C
Absolute maximum temperature: 38.3 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 77 days
Number of rainy days: 288 days
Look at detailed online map of Rillakadawela
* Weather data for Rillakadawela 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 | 31.0 | 34.1 | 35.5 | 34.7 | 34.6 | 37.5 | 38.3 | 35.8 | 34.0 | 32.0 | 31.1 |
| Average daytime temperature (°C) | 28.1 | 29.7 | 31.8 | 33.7 | 32.0 | 33.3 | 33.9 | 36.1 | 33.2 | 31.6 | 29.9 | 29.0 |
| Average temperature (°C) | 23.8 | 24.7 | 26.5 | 27.7 | 27.7 | 28.7 | 28.8 | 29.3 | 27.7 | 26.2 | 25.3 | 25.3 |
| Average night temperature (°C) | 20.3 | 20.8 | 22.7 | 23.7 | 24.9 | 25.6 | 25.4 | 25.1 | 24.4 | 23.2 | 22.7 | 22.9 |
| Absolute minimum temperature (°C) | 17.5 | 18.5 | 20.8 | 22.3 | 23.3 | 24.4 | 24.6 | 24.4 | 23.6 | 22.1 | 22.0 | 22.1 |
| 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 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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 | 9.9 | 10.7 | 10.3 | 8.7 | 10.5 | 9.4 | 10.8 | 9.7 | 8.8 | 7.2 | 7.6 |
| Precipitation (mm) | 83 | 121 | 75 | 133 | 112 | 26 | 39 | 88 | 81 | 316 | 504 | 299 |
| Sunny days | 14 | 15 | 5 | 8 | 5 | 5 | 9 | 15 | 0 | 0 | 0 | 1 |
| Rainy days | 17 | 13 | 26 | 22 | 26 | 25 | 22 | 16 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rillakadawela is at