Average annual temperature is 28.1 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: 22.4 °C
Number of sunny days: 120 days
Number of rainy days: 245 days
Look at detailed online map of Aththai
* Weather data for Aththai 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) | 27.9 | 29.0 | 32.2 | 34.1 | 33.9 | 34.8 | 35.8 | 36.4 | 34.1 | 33.5 | 30.1 | 30.2 |
| Average daytime temperature (°C) | 27.1 | 27.5 | 29.9 | 32.0 | 31.6 | 32.5 | 32.8 | 34.0 | 32.2 | 31.6 | 28.8 | 28.2 |
| Average temperature (°C) | 25.6 | 25.7 | 27.6 | 29.2 | 29.3 | 29.8 | 29.5 | 29.9 | 29.1 | 28.2 | 26.4 | 26.4 |
| Average night temperature (°C) | 24.2 | 24.0 | 25.5 | 26.5 | 27.6 | 28.0 | 27.2 | 26.9 | 26.8 | 25.3 | 24.2 | 24.8 |
| Absolute minimum temperature (°C) | 23.0 | 22.4 | 24.4 | 25.2 | 24.4 | 26.3 | 26.4 | 26.3 | 24.1 | 23.8 | 23.3 | 24.1 |
| 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) | 11.6 | 11.8 | 12.1 | 12.3 | 12.6 | 12.7 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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) | 9.7 | 10.2 | 11.1 | 11.0 | 9.5 | 10.1 | 9.3 | 11.3 | 10.5 | 10.7 | 8.0 | 8.2 |
| Precipitation (mm) | 50 | 133 | 21 | 67 | 71 | 41 | 48 | 13 | 50 | 133 | 591 | 256 |
| Sunny days | 15 | 17 | 8 | 13 | 17 | 15 | 8 | 19 | 3 | 4 | 0 | 1 |
| Rainy days | 16 | 11 | 23 | 17 | 14 | 15 | 23 | 12 | 27 | 27 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Aththai is at