Average annual temperature is 26.3 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 43 days
Number of rainy days: 322 days
Look at detailed online map of Hewanwatta
* Weather data for Hewanwatta 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) | 28.8 | 29.9 | 32.5 | 34.1 | 35.1 | 36.6 | 38.7 | 39.0 | 33.9 | 31.7 | 31.0 | 31.0 |
| Average daytime temperature (°C) | 27.1 | 28.0 | 29.3 | 31.4 | 32.4 | 35.3 | 35.0 | 36.7 | 32.2 | 30.2 | 29.3 | 28.3 |
| Average temperature (°C) | 23.4 | 24.1 | 25.2 | 26.5 | 27.4 | 29.0 | 28.9 | 29.4 | 26.6 | 25.4 | 24.9 | 24.8 |
| Average night temperature (°C) | 20.5 | 21.1 | 22.1 | 22.8 | 23.8 | 24.5 | 24.3 | 24.2 | 23.4 | 22.6 | 22.4 | 22.6 |
| Absolute minimum temperature (°C) | 17.5 | 18.2 | 21.5 | 22.0 | 22.7 | 23.7 | 23.2 | 23.0 | 22.5 | 21.8 | 21.7 | 21.5 |
| 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 | 11.7 |
| 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) | 8.3 | 8.8 | 8.9 | 10.2 | 9.4 | 10.7 | 9.7 | 10.9 | 8.7 | 8.2 | 7.2 | 6.6 |
| Precipitation (mm) | 209 | 185 | 164 | 89 | 141 | 53 | 40 | 90 | 286 | 485 | 465 | 588 |
| Sunny days | 6 | 5 | 5 | 6 | 9 | 2 | 3 | 6 | 1 | 0 | 0 | 0 |
| Rainy days | 25 | 23 | 26 | 24 | 22 | 28 | 28 | 25 | 29 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Hewanwatta is at