Average annual temperature is 26.5 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: 17.9 °C
Number of sunny days: 51 days
Number of rainy days: 314 days
Look at detailed online map of Dumbana
* Weather data for Dumbana 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) | 28.9 | 30.3 | 32.8 | 34.8 | 35.3 | 37.1 | 39.3 | 38.7 | 36.7 | 32.5 | 31.1 | 30.8 |
| Average daytime temperature (°C) | 27.5 | 28.3 | 30.0 | 32.5 | 32.7 | 35.7 | 35.3 | 37.1 | 33.3 | 30.4 | 29.2 | 28.4 |
| Average temperature (°C) | 23.4 | 24.1 | 25.3 | 26.8 | 27.4 | 29.9 | 29.4 | 29.6 | 27.3 | 25.3 | 24.7 | 24.5 |
| Average night temperature (°C) | 20.2 | 21.1 | 21.8 | 22.9 | 23.8 | 25.6 | 24.9 | 24.2 | 23.5 | 22.3 | 22.1 | 22.2 |
| Absolute minimum temperature (°C) | 17.9 | 18.5 | 20.8 | 21.4 | 22.9 | 23.9 | 23.2 | 23.1 | 22.0 | 21.4 | 21.5 | 21.4 |
| 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 | 12.5 | 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) | 8.4 | 9.2 | 9.3 | 10.2 | 9.4 | 10.7 | 9.5 | 10.8 | 8.7 | 8.3 | 7.2 | 6.7 |
| Precipitation (mm) | 190 | 132 | 139 | 112 | 122 | 30 | 23 | 92 | 133 | 419 | 450 | 441 |
| Sunny days | 6 | 6 | 4 | 4 | 8 | 3 | 10 | 8 | 2 | 0 | 0 | 0 |
| Rainy days | 25 | 22 | 27 | 26 | 23 | 27 | 21 | 23 | 28 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dumbana is at