Average annual temperature is 26.2 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: 18.4 °C
Number of sunny days: 47 days
Number of rainy days: 318 days
Look at detailed online map of Hettigama
* Weather data for Hettigama 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) | 30.1 | 31.6 | 34.0 | 35.3 | 33.8 | 33.1 | 33.5 | 35.6 | 32.6 | 32.5 | 32.0 | 30.5 |
| Average daytime temperature (°C) | 28.6 | 29.6 | 31.9 | 33.3 | 31.4 | 31.5 | 30.9 | 33.8 | 30.3 | 30.4 | 30.0 | 29.0 |
| Average temperature (°C) | 24.0 | 24.9 | 26.5 | 27.2 | 27.1 | 27.3 | 27.0 | 28.1 | 26.0 | 25.5 | 25.2 | 25.2 |
| Average night temperature (°C) | 20.4 | 21.1 | 22.6 | 23.2 | 24.3 | 24.4 | 24.3 | 24.5 | 23.4 | 22.7 | 22.5 | 22.9 |
| Absolute minimum temperature (°C) | 18.4 | 19.3 | 21.6 | 21.7 | 23.0 | 23.2 | 22.8 | 23.4 | 22.4 | 21.4 | 21.9 | 22.2 |
| 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.5 | 12.4 | 12.2 | 11.9 | 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) | 9.4 | 9.9 | 10.6 | 10.1 | 9.1 | 10.3 | 9.6 | 11.0 | 8.6 | 8.2 | 7.5 | 7.8 |
| Precipitation (mm) | 77 | 94 | 82 | 136 | 133 | 50 | 72 | 21 | 134 | 280 | 496 | 220 |
| Sunny days | 15 | 12 | 3 | 5 | 1 | 1 | 1 | 8 | 0 | 1 | 0 | 0 |
| Rainy days | 16 | 16 | 28 | 25 | 30 | 29 | 30 | 23 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Hettigama is at