Average annual temperature is 26.7 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: 18.4 °C
Number of sunny days: 80 days
Number of rainy days: 285 days
Look at detailed online map of Maha Kalattewa
* Weather data for Maha Kalattewa 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 | 31.3 | 34.3 | 35.7 | 34.1 | 33.8 | 36.8 | 37.2 | 34.4 | 33.8 | 31.6 | 31.2 |
| Average daytime temperature (°C) | 28.3 | 29.7 | 31.7 | 33.5 | 31.8 | 32.5 | 32.9 | 35.1 | 32.4 | 31.4 | 30.0 | 29.0 |
| Average temperature (°C) | 24.0 | 24.9 | 26.6 | 27.7 | 27.6 | 28.2 | 28.2 | 28.8 | 27.3 | 26.2 | 25.4 | 25.4 |
| Average night temperature (°C) | 20.9 | 21.5 | 23.2 | 24.2 | 25.0 | 25.4 | 25.2 | 25.0 | 24.3 | 23.4 | 23.1 | 23.1 |
| Absolute minimum temperature (°C) | 18.4 | 19.7 | 22.0 | 22.9 | 23.8 | 24.1 | 24.3 | 24.3 | 23.3 | 22.4 | 22.4 | 22.5 |
| 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 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) | 9.2 | 9.9 | 10.7 | 10.2 | 8.8 | 10.6 | 9.4 | 10.9 | 9.5 | 8.7 | 7.1 | 7.8 |
| Precipitation (mm) | 80 | 120 | 82 | 138 | 130 | 23 | 37 | 63 | 81 | 298 | 529 | 277 |
| Sunny days | 16 | 13 | 7 | 8 | 7 | 7 | 8 | 12 | 0 | 1 | 0 | 1 |
| Rainy days | 15 | 15 | 24 | 22 | 24 | 23 | 23 | 19 | 30 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Maha Kalattewa is at