Average annual temperature is 25.7 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: 17.0 °C
Number of sunny days: 37 days
Number of rainy days: 328 days
Look at detailed online map of Hewadiwela
* Weather data for Hewadiwela 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) | 30.5 | 32.1 | 34.5 | 36.3 | 32.7 | 31.9 | 31.1 | 33.6 | 30.8 | 32.1 | 31.2 | 31.6 |
| Average daytime temperature (°C) | 29.1 | 30.5 | 32.5 | 33.5 | 30.5 | 30.0 | 29.2 | 31.7 | 28.6 | 29.2 | 29.7 | 29.5 |
| Average temperature (°C) | 24.1 | 25.0 | 26.5 | 27.0 | 26.5 | 26.4 | 26.0 | 27.1 | 25.1 | 24.9 | 24.8 | 25.2 |
| Average night temperature (°C) | 19.8 | 20.4 | 22.2 | 22.8 | 24.1 | 24.0 | 23.6 | 24.1 | 22.9 | 22.3 | 22.0 | 22.2 |
| Absolute minimum temperature (°C) | 17.0 | 17.3 | 21.3 | 21.6 | 22.9 | 22.6 | 21.7 | 23.0 | 21.9 | 21.2 | 20.9 | 21.1 |
| 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 | 12.5 | 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) | 9.7 | 9.8 | 10.4 | 9.8 | 9.1 | 10.1 | 9.3 | 10.8 | 8.3 | 7.7 | 7.4 | 8.3 |
| Precipitation (mm) | 85 | 113 | 100 | 161 | 167 | 105 | 168 | 38 | 220 | 419 | 566 | 278 |
| Sunny days | 16 | 9 | 2 | 3 | 0 | 0 | 1 | 4 | 0 | 0 | 0 | 2 |
| Rainy days | 15 | 19 | 29 | 27 | 31 | 30 | 30 | 27 | 30 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Hewadiwela is at