Average annual temperature is 27.2 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: 19.2 °C
Number of sunny days: 41 days
Number of rainy days: 324 days
Look at detailed online map of Alahena
* Weather data for Alahena 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) | 29.3 | 30.1 | 32.9 | 35.1 | 35.2 | 37.2 | 39.3 | 38.6 | 37.3 | 33.2 | 31.3 | 32.0 |
| Average daytime temperature (°C) | 28.0 | 28.5 | 30.1 | 32.0 | 33.2 | 35.5 | 35.8 | 37.0 | 34.1 | 31.2 | 29.9 | 29.1 |
| Average temperature (°C) | 24.4 | 24.9 | 26.1 | 27.4 | 28.1 | 29.4 | 29.4 | 30.3 | 28.3 | 26.3 | 25.7 | 25.5 |
| Average night temperature (°C) | 21.4 | 22.1 | 22.9 | 24.0 | 24.5 | 25.3 | 25.0 | 25.5 | 25.0 | 23.5 | 23.2 | 23.2 |
| Absolute minimum temperature (°C) | 19.2 | 20.2 | 21.9 | 22.8 | 22.9 | 24.6 | 23.4 | 24.1 | 23.5 | 22.7 | 22.4 | 22.4 |
| 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) | 11.8 | 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) | 9.0 | 9.4 | 9.8 | 10.4 | 9.6 | 10.8 | 9.6 | 11.1 | 9.5 | 9.0 | 8.3 | 7.5 |
| Precipitation (mm) | 175 | 126 | 170 | 79 | 126 | 72 | 46 | 51 | 179 | 381 | 493 | 516 |
| Sunny days | 7 | 6 | 5 | 4 | 9 | 1 | 3 | 6 | 0 | 0 | 0 | 0 |
| Rainy days | 24 | 22 | 26 | 26 | 22 | 29 | 28 | 25 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Alahena is at