Average annual temperature is 26.8 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: 18.8 °C
Number of sunny days: 69 days
Number of rainy days: 296 days
Look at detailed online map of Dedunupitiya Wewa
* Weather data for Dedunupitiya Wewa 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) | 30.4 | 32.6 | 34.7 | 35.6 | 33.7 | 33.5 | 35.8 | 37.1 | 33.4 | 33.6 | 32.1 | 30.9 |
| Average daytime temperature (°C) | 28.9 | 30.2 | 32.3 | 33.6 | 31.6 | 32.2 | 32.1 | 34.9 | 31.4 | 31.2 | 30.3 | 29.5 |
| Average temperature (°C) | 24.3 | 25.2 | 26.9 | 27.7 | 27.7 | 28.2 | 28.0 | 28.9 | 27.0 | 26.1 | 25.6 | 25.6 |
| Average night temperature (°C) | 20.8 | 21.4 | 23.2 | 24.1 | 25.0 | 25.5 | 25.3 | 25.2 | 24.1 | 23.3 | 23.0 | 23.2 |
| Absolute minimum temperature (°C) | 18.8 | 19.4 | 21.6 | 22.5 | 23.5 | 24.2 | 24.3 | 24.5 | 23.0 | 22.3 | 22.3 | 22.7 |
| 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) | 8.9 | 9.7 | 10.6 | 10.3 | 8.8 | 10.4 | 9.5 | 11.0 | 9.2 | 8.2 | 7.0 | 7.4 |
| Precipitation (mm) | 63 | 99 | 107 | 106 | 113 | 35 | 51 | 20 | 92 | 291 | 413 | 263 |
| Sunny days | 16 | 14 | 5 | 7 | 1 | 4 | 7 | 12 | 1 | 1 | 0 | 1 |
| Rainy days | 15 | 14 | 26 | 23 | 30 | 26 | 24 | 19 | 29 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dedunupitiya Wewa is at