Average annual temperature is 26.6 °C
Absolute maximum temperature: 39.5 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 55 days
Number of rainy days: 310 days
Look at detailed online map of Rittawela
* Weather data for Rittawela 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) | 28.9 | 30.1 | 32.7 | 34.7 | 35.0 | 37.3 | 39.5 | 39.1 | 37.9 | 32.8 | 31.4 | 31.5 |
| Average daytime temperature (°C) | 27.5 | 28.3 | 30.0 | 32.4 | 32.7 | 35.3 | 35.1 | 37.3 | 34.1 | 30.8 | 29.5 | 28.7 |
| Average temperature (°C) | 23.4 | 24.1 | 25.3 | 26.7 | 27.5 | 29.8 | 29.6 | 29.9 | 27.7 | 25.5 | 24.8 | 24.6 |
| Average night temperature (°C) | 20.2 | 21.0 | 21.9 | 22.8 | 23.8 | 25.5 | 25.2 | 24.3 | 23.6 | 22.4 | 22.2 | 22.3 |
| Absolute minimum temperature (°C) | 17.5 | 18.1 | 20.9 | 21.6 | 22.9 | 24.0 | 23.2 | 22.9 | 22.1 | 21.3 | 21.7 | 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 | 12.5 | 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) | 8.1 | 8.9 | 9.1 | 10.2 | 9.5 | 10.7 | 9.5 | 10.9 | 8.5 | 8.2 | 7.1 | 6.6 |
| Precipitation (mm) | 205 | 138 | 154 | 102 | 95 | 35 | 21 | 76 | 124 | 390 | 481 | 481 |
| Sunny days | 7 | 6 | 5 | 6 | 7 | 5 | 11 | 8 | 0 | 0 | 0 | 0 |
| Rainy days | 24 | 22 | 26 | 24 | 24 | 25 | 20 | 23 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rittawela is at