Average annual temperature is 24.0 °C
Absolute maximum temperature: 32.3 °C
Absolute minimum temperature: 16.3 °C
Number of sunny days: 38 days
Number of rainy days: 327 days
Look at detailed online map of Halwinna
* Weather data for Halwinna 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) | 28.7 | 29.7 | 30.0 | 31.1 | 31.0 | 29.7 | 30.2 | 32.3 | 28.7 | 28.2 | 28.2 | 28.3 |
| Average daytime temperature (°C) | 27.4 | 27.9 | 28.5 | 29.2 | 28.6 | 29.0 | 28.1 | 30.7 | 27.1 | 26.7 | 27.1 | 26.7 |
| Average temperature (°C) | 22.6 | 23.1 | 23.7 | 24.4 | 24.9 | 25.2 | 24.6 | 25.7 | 23.7 | 23.1 | 23.1 | 23.2 |
| Average night temperature (°C) | 18.6 | 19.4 | 20.2 | 20.9 | 22.4 | 22.7 | 22.3 | 22.4 | 21.6 | 20.7 | 20.6 | 20.6 |
| Absolute minimum temperature (°C) | 16.3 | 17.0 | 18.6 | 19.8 | 20.8 | 21.6 | 21.2 | 21.8 | 20.5 | 19.0 | 19.4 | 19.2 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| 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 | 9.4 | 9.6 | 9.8 | 8.7 | 10.3 | 9.1 | 10.8 | 7.7 | 6.6 | 7.1 | 7.5 |
| Precipitation (mm) | 112 | 188 | 186 | 161 | 86 | 31 | 59 | 36 | 195 | 500 | 563 | 320 |
| Sunny days | 7 | 5 | 1 | 1 | 6 | 2 | 5 | 11 | 0 | 0 | 0 | 0 |
| Rainy days | 24 | 23 | 30 | 29 | 25 | 28 | 26 | 20 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Halwinna is at