Average annual temperature is 26.5 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: 18.8 °C
Number of sunny days: 39 days
Number of rainy days: 326 days
Look at detailed online map of Gopallawa
* Weather data for Gopallawa 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) | 30.8 | 32.7 | 34.8 | 35.8 | 33.6 | 32.7 | 32.3 | 34.5 | 31.9 | 33.0 | 32.2 | 31.4 |
| Average daytime temperature (°C) | 29.4 | 30.6 | 32.8 | 33.5 | 31.4 | 30.9 | 30.4 | 32.7 | 29.7 | 30.2 | 30.6 | 29.9 |
| Average temperature (°C) | 24.7 | 25.7 | 27.1 | 27.6 | 27.4 | 27.3 | 27.0 | 27.9 | 26.0 | 25.8 | 25.7 | 25.9 |
| Average night temperature (°C) | 21.0 | 21.7 | 23.3 | 23.9 | 24.8 | 24.6 | 24.5 | 24.7 | 23.6 | 23.3 | 23.1 | 23.3 |
| Absolute minimum temperature (°C) | 18.8 | 19.7 | 22.4 | 22.8 | 23.3 | 22.7 | 22.7 | 23.6 | 22.5 | 22.4 | 22.7 | 22.6 |
| 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 | 12.5 | 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) | 9.5 | 9.9 | 10.7 | 10.1 | 9.3 | 10.2 | 9.6 | 11.1 | 8.3 | 8.2 | 7.5 | 8.0 |
| Precipitation (mm) | 49 | 61 | 103 | 174 | 182 | 95 | 100 | 25 | 225 | 378 | 594 | 272 |
| Sunny days | 15 | 13 | 3 | 2 | 2 | 0 | 1 | 2 | 0 | 0 | 0 | 1 |
| Rainy days | 16 | 15 | 28 | 28 | 29 | 30 | 30 | 29 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Gopallawa is at