Average annual temperature is 27.5 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: 21.1 °C
Number of sunny days: 65 days
Number of rainy days: 300 days
Look at detailed online map of Addalachenai
* Weather data for Addalachenai 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) | 28.7 | 29.3 | 30.4 | 32.0 | 34.0 | 34.9 | 37.6 | 36.8 | 36.3 | 32.6 | 30.8 | 30.6 |
| Average daytime temperature (°C) | 27.5 | 27.9 | 29.0 | 30.4 | 31.6 | 33.0 | 34.5 | 34.5 | 33.8 | 30.3 | 29.0 | 28.5 |
| Average temperature (°C) | 25.3 | 25.7 | 26.8 | 27.9 | 28.3 | 29.3 | 29.5 | 29.7 | 28.6 | 26.5 | 25.9 | 26.0 |
| Average night temperature (°C) | 23.0 | 23.5 | 24.2 | 25.4 | 25.7 | 26.3 | 25.7 | 26.1 | 25.4 | 23.9 | 23.7 | 24.0 |
| Absolute minimum temperature (°C) | 21.1 | 22.5 | 22.8 | 24.2 | 24.5 | 24.9 | 24.8 | 24.6 | 24.1 | 22.9 | 23.1 | 22.9 |
| 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 | 12.5 | 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) | 9.1 | 9.4 | 10.0 | 10.6 | 9.5 | 10.8 | 9.6 | 11.1 | 9.9 | 9.6 | 8.4 | 7.9 |
| Precipitation (mm) | 187 | 224 | 154 | 64 | 72 | 31 | 37 | 42 | 164 | 312 | 472 | 471 |
| Sunny days | 6 | 6 | 4 | 8 | 12 | 12 | 6 | 8 | 0 | 2 | 0 | 1 |
| Rainy days | 25 | 22 | 27 | 22 | 19 | 18 | 25 | 23 | 30 | 29 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Addalachenai is at