Average annual temperature is 27.0 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 19.1 °C
Number of sunny days: 58 days
Number of rainy days: 307 days
Look at detailed online map of Gonaganaragama
* Weather data for Gonaganaragama 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) | 32.1 | 32.4 | 37.1 | 37.6 | 37.7 | 37.3 | 37.1 | 39.0 | 33.2 | 31.7 | 30.7 | 30.1 |
| Average daytime temperature (°C) | 30.4 | 30.3 | 32.3 | 33.9 | 33.0 | 35.8 | 34.8 | 36.6 | 31.4 | 29.9 | 29.4 | 28.8 |
| Average temperature (°C) | 25.5 | 25.7 | 26.7 | 27.4 | 27.9 | 29.7 | 29.1 | 29.7 | 26.7 | 25.2 | 24.9 | 25.3 |
| Average night temperature (°C) | 21.7 | 22.3 | 23.0 | 23.5 | 24.7 | 25.9 | 25.2 | 25.3 | 24.0 | 22.6 | 22.4 | 23.1 |
| Absolute minimum temperature (°C) | 19.1 | 20.9 | 21.4 | 22.0 | 22.9 | 25.0 | 22.9 | 23.5 | 23.1 | 21.6 | 21.4 | 22.1 |
| 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) | 11.8 | 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) | 9.6 | 10.0 | 9.9 | 9.7 | 9.3 | 10.8 | 10.1 | 11.1 | 9.2 | 8.1 | 7.7 | 8.1 |
| Precipitation (mm) | 68 | 102 | 140 | 168 | 201 | 24 | 30 | 31 | 147 | 353 | 572 | 323 |
| Sunny days | 13 | 10 | 2 | 1 | 6 | 5 | 9 | 9 | 1 | 0 | 0 | 2 |
| Rainy days | 18 | 18 | 29 | 29 | 25 | 25 | 22 | 22 | 29 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Gonaganaragama is at