Average annual temperature is 26.7 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: 17.7 °C
Number of sunny days: 80 days
Number of rainy days: 285 days
Look at detailed online map of Dunwattegama
* Weather data for Dunwattegama 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) | 29.1 | 31.2 | 34.2 | 35.4 | 34.5 | 34.4 | 36.8 | 37.7 | 35.8 | 33.8 | 31.6 | 31.8 |
| Average daytime temperature (°C) | 28.1 | 29.4 | 31.6 | 33.7 | 32.0 | 33.2 | 33.6 | 35.6 | 33.0 | 31.6 | 29.8 | 28.8 |
| Average temperature (°C) | 23.8 | 24.7 | 26.5 | 27.7 | 27.7 | 28.5 | 28.5 | 29.0 | 27.6 | 26.2 | 25.3 | 25.2 |
| Average night temperature (°C) | 20.6 | 21.0 | 22.8 | 23.8 | 24.8 | 25.4 | 25.2 | 24.9 | 24.3 | 23.3 | 22.8 | 22.9 |
| Absolute minimum temperature (°C) | 17.7 | 18.9 | 21.4 | 22.6 | 23.5 | 24.1 | 24.2 | 24.2 | 23.6 | 22.5 | 22.2 | 22.4 |
| 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 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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) | 9.3 | 9.9 | 10.7 | 10.3 | 8.8 | 10.7 | 9.5 | 10.9 | 9.4 | 8.8 | 7.2 | 7.5 |
| Precipitation (mm) | 99 | 104 | 63 | 120 | 111 | 18 | 28 | 105 | 77 | 305 | 505 | 260 |
| Sunny days | 14 | 13 | 6 | 8 | 6 | 8 | 8 | 16 | 0 | 0 | 0 | 1 |
| Rainy days | 17 | 15 | 25 | 22 | 25 | 22 | 23 | 15 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dunwattegama is at