Average annual temperature is 25.6 °C
Absolute maximum temperature: 32.8 °C
Absolute minimum temperature: 18.2 °C
Number of sunny days: 13 days
Number of rainy days: 352 days
Look at detailed online map of Mahena
* Weather data for Mahena 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) | 31.2 | 32.1 | 31.9 | 32.8 | 31.3 | 30.5 | 29.9 | 30.4 | 30.2 | 31.2 | 31.0 | 31.6 |
| Average daytime temperature (°C) | 29.6 | 30.0 | 30.5 | 31.3 | 29.7 | 29.3 | 29.1 | 29.6 | 28.5 | 29.1 | 29.6 | 29.7 |
| Average temperature (°C) | 24.6 | 25.2 | 25.9 | 26.4 | 26.4 | 26.1 | 26.1 | 26.3 | 25.1 | 25.1 | 25.2 | 25.4 |
| Average night temperature (°C) | 20.6 | 21.6 | 22.5 | 23.1 | 23.9 | 23.5 | 23.4 | 23.6 | 22.9 | 22.7 | 22.4 | 22.6 |
| Absolute minimum temperature (°C) | 18.2 | 20.2 | 21.5 | 21.9 | 22.3 | 22.6 | 21.7 | 22.7 | 22.2 | 21.7 | 21.9 | 22.0 |
| 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) | 9.5 | 9.7 | 10.1 | 10.1 | 8.1 | 8.5 | 9.2 | 10.7 | 6.6 | 6.7 | 7.1 | 7.6 |
| Precipitation (mm) | 137 | 148 | 223 | 257 | 269 | 417 | 362 | 173 | 676 | 666 | 679 | 513 |
| Sunny days | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Rainy days | 22 | 25 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mahena is at