Average annual temperature is 26.3 °C
Absolute maximum temperature: 36.0 °C
Absolute minimum temperature: 19.3 °C
Number of sunny days: 39 days
Number of rainy days: 326 days
Look at detailed online map of Mettagama
* Weather data for Mettagama 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) | 31.3 | 32.8 | 34.7 | 36.0 | 33.2 | 32.1 | 31.1 | 33.0 | 31.3 | 32.3 | 31.8 | 31.5 |
| Average daytime temperature (°C) | 29.9 | 31.0 | 33.1 | 33.5 | 30.9 | 30.3 | 29.7 | 31.4 | 29.0 | 29.6 | 30.2 | 29.9 |
| Average temperature (°C) | 24.9 | 25.9 | 27.2 | 27.4 | 27.1 | 26.7 | 26.5 | 27.2 | 25.5 | 25.5 | 25.4 | 25.9 |
| Average night temperature (°C) | 21.3 | 21.8 | 23.5 | 23.8 | 24.5 | 24.1 | 24.0 | 24.3 | 23.2 | 23.1 | 23.0 | 23.4 |
| Absolute minimum temperature (°C) | 19.3 | 19.7 | 22.6 | 22.9 | 22.8 | 22.4 | 22.2 | 23.2 | 22.3 | 22.1 | 22.3 | 22.7 |
| 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 | 12.5 | 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) | 9.4 | 9.6 | 10.4 | 10.0 | 9.1 | 9.5 | 9.4 | 10.8 | 7.5 | 7.5 | 7.4 | 7.8 |
| Precipitation (mm) | 78 | 103 | 115 | 192 | 177 | 175 | 151 | 47 | 349 | 404 | 576 | 279 |
| Sunny days | 17 | 13 | 1 | 0 | 1 | 0 | 0 | 3 | 0 | 1 | 0 | 3 |
| Rainy days | 14 | 15 | 30 | 30 | 30 | 30 | 31 | 28 | 30 | 30 | 30 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mettagama is at