Average annual temperature is 26.9 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: 20.1 °C
Number of sunny days: 48 days
Number of rainy days: 317 days
Look at detailed online map of Mattala
* Weather data for Mattala 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) | 32.0 | 32.8 | 33.5 | 35.2 | 36.0 | 36.7 | 36.7 | 38.8 | 32.1 | 30.7 | 30.8 | 30.3 |
| Average daytime temperature (°C) | 30.3 | 30.8 | 31.4 | 32.7 | 32.3 | 35.0 | 34.2 | 35.8 | 30.5 | 29.3 | 29.2 | 28.9 |
| Average temperature (°C) | 25.6 | 26.0 | 26.5 | 27.3 | 27.7 | 29.2 | 28.7 | 29.4 | 26.3 | 25.3 | 25.2 | 25.5 |
| Average night temperature (°C) | 22.0 | 22.5 | 23.0 | 23.6 | 24.6 | 25.3 | 24.8 | 25.0 | 23.7 | 22.9 | 22.7 | 23.1 |
| Absolute minimum temperature (°C) | 20.1 | 21.1 | 21.9 | 22.4 | 23.6 | 24.3 | 23.1 | 23.4 | 22.8 | 22.0 | 21.9 | 22.3 |
| 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 | 12.4 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| 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) | 9.4 | 9.9 | 9.8 | 10.0 | 9.7 | 10.9 | 10.2 | 11.1 | 9.2 | 7.7 | 7.4 | 7.9 |
| Precipitation (mm) | 78 | 139 | 175 | 145 | 156 | 39 | 39 | 40 | 177 | 438 | 635 | 332 |
| Sunny days | 10 | 10 | 1 | 1 | 6 | 3 | 6 | 8 | 0 | 0 | 0 | 3 |
| Rainy days | 21 | 18 | 30 | 29 | 25 | 27 | 25 | 23 | 30 | 31 | 30 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mattala is at