Average annual temperature is 26.2 °C
Absolute maximum temperature: 36.2 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 36 days
Number of rainy days: 329 days
Look at detailed online map of Halwella
* Weather data for Halwella 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) | 31.3 | 32.7 | 35.3 | 36.2 | 33.5 | 32.1 | 31.6 | 33.9 | 31.6 | 32.3 | 31.8 | 31.8 |
| Average daytime temperature (°C) | 29.8 | 31.1 | 33.3 | 33.8 | 31.0 | 30.5 | 30.0 | 32.2 | 29.2 | 29.9 | 30.3 | 30.0 |
| Average temperature (°C) | 24.8 | 25.7 | 27.1 | 27.4 | 27.1 | 26.8 | 26.5 | 27.5 | 25.5 | 25.4 | 25.3 | 25.7 |
| Average night temperature (°C) | 20.9 | 21.3 | 22.9 | 23.4 | 24.6 | 24.2 | 23.9 | 24.3 | 23.3 | 22.8 | 22.5 | 23.0 |
| Absolute minimum temperature (°C) | 18.7 | 19.1 | 22.1 | 21.7 | 23.2 | 22.3 | 22.2 | 23.2 | 22.3 | 21.7 | 21.9 | 22.0 |
| 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) | 9.6 | 9.7 | 10.3 | 9.9 | 9.0 | 9.8 | 9.2 | 10.8 | 7.8 | 7.6 | 7.4 | 8.1 |
| Precipitation (mm) | 88 | 94 | 129 | 177 | 197 | 149 | 170 | 54 | 310 | 438 | 651 | 323 |
| Sunny days | 15 | 13 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 5 |
| Rainy days | 16 | 15 | 30 | 29 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 26 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Halwella is at