Average annual temperature is 22.8 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: 13.0 °C
Number of sunny days: 45 days
Number of rainy days: 320 days
Look at detailed online map of Dandahena
* Weather data for Dandahena 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) | 23.4 | 24.6 | 27.1 | 28.2 | 30.4 | 30.7 | 32.6 | 32.3 | 28.5 | 27.1 | 26.7 | 26.7 |
| Average daytime temperature (°C) | 22.4 | 23.3 | 24.8 | 26.5 | 27.8 | 29.6 | 29.3 | 30.6 | 27.5 | 25.6 | 25.1 | 24.2 |
| Average temperature (°C) | 19.7 | 20.7 | 21.6 | 22.7 | 23.8 | 24.9 | 24.6 | 25.0 | 23.6 | 22.7 | 22.3 | 21.9 |
| Average night temperature (°C) | 16.9 | 17.6 | 18.3 | 18.8 | 20.1 | 20.8 | 20.7 | 20.1 | 20.5 | 20.0 | 19.7 | 19.8 |
| Absolute minimum temperature (°C) | 13.0 | 14.4 | 17.0 | 17.0 | 18.1 | 19.3 | 18.2 | 17.9 | 19.0 | 18.3 | 16.7 | 17.0 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 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) | 8.5 | 8.4 | 8.8 | 10.0 | 9.1 | 10.4 | 9.4 | 10.4 | 7.8 | 7.2 | 7.2 | 6.2 |
| Precipitation (mm) | 214 | 131 | 137 | 144 | 175 | 24 | 69 | 207 | 348 | 693 | 483 | 425 |
| Sunny days | 4 | 4 | 7 | 7 | 6 | 3 | 6 | 5 | 1 | 2 | 0 | 0 |
| Rainy days | 27 | 24 | 24 | 23 | 25 | 27 | 25 | 26 | 29 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Dandahena is at