Average annual temperature is 27.1 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 19.5 °C
Number of sunny days: 39 days
Number of rainy days: 326 days
Look at detailed online map of Dematamalpelessa
* Weather data for Dematamalpelessa 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) | 29.2 | 30.4 | 33.6 | 35.5 | 36.2 | 37.8 | 38.7 | 39.0 | 35.5 | 32.7 | 31.5 | 32.0 |
| Average daytime temperature (°C) | 28.0 | 28.6 | 30.5 | 32.6 | 33.5 | 36.0 | 35.9 | 37.2 | 33.6 | 31.0 | 30.0 | 29.1 |
| Average temperature (°C) | 24.3 | 24.8 | 26.1 | 27.5 | 28.1 | 29.5 | 29.5 | 30.1 | 27.7 | 26.2 | 25.7 | 25.5 |
| Average night temperature (°C) | 21.5 | 21.9 | 23.0 | 23.9 | 24.4 | 25.2 | 25.0 | 25.3 | 24.5 | 23.4 | 23.3 | 23.3 |
| Absolute minimum temperature (°C) | 19.5 | 20.2 | 22.0 | 22.9 | 23.5 | 24.4 | 23.7 | 24.1 | 23.1 | 22.5 | 22.8 | 22.8 |
| 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) | 9.0 | 9.1 | 9.7 | 10.4 | 9.5 | 10.6 | 9.6 | 11.0 | 9.3 | 8.8 | 7.7 | 7.2 |
| Precipitation (mm) | 173 | 135 | 111 | 99 | 134 | 61 | 45 | 46 | 219 | 389 | 488 | 485 |
| Sunny days | 6 | 5 | 5 | 5 | 4 | 3 | 5 | 5 | 1 | 0 | 0 | 0 |
| Rainy days | 25 | 23 | 26 | 25 | 27 | 27 | 26 | 26 | 29 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dematamalpelessa is at