Average annual temperature is 27.0 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 82 days
Number of rainy days: 283 days
Look at detailed online map of Billewa
* Weather data for Billewa 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) | 29.8 | 32.1 | 35.4 | 36.9 | 35.3 | 35.6 | 37.6 | 37.7 | 34.5 | 34.3 | 32.3 | 31.1 |
| Average daytime temperature (°C) | 28.6 | 30.2 | 32.7 | 34.5 | 32.5 | 33.7 | 33.6 | 35.6 | 32.6 | 31.6 | 30.0 | 29.2 |
| Average temperature (°C) | 24.0 | 24.9 | 26.8 | 27.8 | 28.1 | 29.1 | 28.7 | 29.2 | 27.8 | 26.2 | 25.3 | 25.4 |
| Average night temperature (°C) | 20.7 | 20.9 | 22.9 | 23.7 | 25.2 | 26.1 | 25.7 | 25.4 | 24.8 | 23.4 | 22.9 | 23.0 |
| Absolute minimum temperature (°C) | 18.5 | 18.5 | 21.8 | 22.0 | 23.5 | 25.1 | 24.9 | 24.7 | 23.7 | 22.4 | 22.2 | 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) | 11.7 | 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) | 9.2 | 9.9 | 10.8 | 10.4 | 8.9 | 10.5 | 9.7 | 10.9 | 9.9 | 8.9 | 7.3 | 7.7 |
| Precipitation (mm) | 86 | 153 | 76 | 128 | 102 | 25 | 48 | 50 | 70 | 305 | 462 | 273 |
| Sunny days | 17 | 13 | 5 | 8 | 4 | 7 | 9 | 16 | 2 | 0 | 0 | 1 |
| Rainy days | 14 | 15 | 26 | 22 | 27 | 23 | 22 | 15 | 28 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Billewa is at