Average annual temperature is 25.7 °C
Absolute maximum temperature: 36.2 °C
Absolute minimum temperature: 17.4 °C
Number of sunny days: 41 days
Number of rainy days: 324 days
Look at detailed online map of Opalla
* Weather data for Opalla 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) | 30.6 | 32.5 | 34.6 | 36.2 | 32.7 | 30.9 | 30.3 | 33.1 | 30.2 | 31.2 | 31.0 | 31.3 |
| Average daytime temperature (°C) | 29.3 | 30.3 | 32.1 | 33.1 | 30.3 | 29.6 | 28.8 | 31.2 | 28.5 | 28.8 | 29.4 | 29.4 |
| Average temperature (°C) | 24.1 | 25.1 | 26.3 | 26.8 | 26.5 | 26.4 | 25.9 | 26.9 | 25.1 | 24.8 | 24.8 | 25.2 |
| Average night temperature (°C) | 19.9 | 20.7 | 22.1 | 22.5 | 23.8 | 24.3 | 23.7 | 23.9 | 22.8 | 22.1 | 22.0 | 22.2 |
| Absolute minimum temperature (°C) | 17.4 | 18.2 | 21.4 | 21.1 | 22.5 | 22.6 | 22.2 | 22.5 | 21.6 | 20.5 | 21.4 | 21.5 |
| 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) | 9.6 | 9.7 | 10.3 | 9.9 | 9.2 | 10.1 | 9.5 | 10.8 | 8.5 | 7.6 | 7.4 | 8.4 |
| Precipitation (mm) | 99 | 131 | 90 | 147 | 172 | 86 | 148 | 59 | 215 | 492 | 590 | 328 |
| Sunny days | 15 | 10 | 4 | 3 | 1 | 0 | 1 | 3 | 0 | 0 | 0 | 4 |
| Rainy days | 16 | 18 | 27 | 27 | 30 | 30 | 30 | 28 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Opalla is at