Average annual temperature is 26.2 °C
Absolute maximum temperature: 39.8 °C
Absolute minimum temperature: 17.8 °C
Number of sunny days: 51 days
Number of rainy days: 314 days
Look at detailed online map of Gonamulla
* Weather data for Gonamulla 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) | 28.8 | 30.4 | 32.5 | 34.8 | 35.9 | 38.5 | 39.5 | 39.8 | 35.8 | 31.9 | 30.2 | 29.8 |
| Average daytime temperature (°C) | 27.3 | 27.8 | 29.4 | 31.8 | 32.2 | 36.1 | 36.1 | 37.9 | 33.0 | 29.9 | 28.9 | 28.0 |
| Average temperature (°C) | 23.4 | 23.9 | 25.0 | 26.4 | 27.0 | 29.1 | 29.0 | 30.0 | 27.0 | 25.1 | 24.5 | 24.4 |
| Average night temperature (°C) | 20.3 | 20.6 | 21.5 | 22.4 | 23.1 | 24.1 | 23.9 | 24.1 | 23.3 | 22.2 | 22.0 | 22.1 |
| Absolute minimum temperature (°C) | 17.8 | 18.3 | 20.8 | 21.3 | 22.1 | 23.3 | 22.4 | 23.0 | 22.2 | 21.0 | 21.1 | 21.2 |
| 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 | 12.5 | 12.3 | 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) | 9.2 | 9.1 | 9.5 | 10.0 | 9.4 | 10.6 | 9.8 | 11.0 | 9.5 | 8.5 | 7.4 | 7.3 |
| Precipitation (mm) | 102 | 120 | 133 | 102 | 165 | 55 | 42 | 60 | 141 | 341 | 426 | 411 |
| Sunny days | 8 | 8 | 5 | 3 | 11 | 3 | 6 | 7 | 0 | 0 | 0 | 0 |
| Rainy days | 23 | 20 | 26 | 27 | 20 | 27 | 25 | 24 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Gonamulla is at