Average annual temperature is 24.2 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: 17.6 °C
Number of sunny days: 57 days
Number of rainy days: 308 days
Look at detailed online map of Opalgala
* Weather data for Opalgala 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) | 26.4 | 27.4 | 31.1 | 33.6 | 31.9 | 31.4 | 31.3 | 33.8 | 31.1 | 29.4 | 28.3 | 28.7 |
| Average daytime temperature (°C) | 25.2 | 26.0 | 28.2 | 30.7 | 29.4 | 29.8 | 28.7 | 31.7 | 28.1 | 27.9 | 27.3 | 26.1 |
| Average temperature (°C) | 21.7 | 22.4 | 23.8 | 25.4 | 25.3 | 25.7 | 25.2 | 26.3 | 24.4 | 23.8 | 23.4 | 23.0 |
| Average night temperature (°C) | 19.3 | 19.7 | 20.5 | 21.4 | 22.9 | 23.2 | 22.6 | 23.0 | 22.1 | 21.1 | 21.0 | 21.2 |
| Absolute minimum temperature (°C) | 17.6 | 18.4 | 19.0 | 19.5 | 21.6 | 22.1 | 20.9 | 22.1 | 21.1 | 19.4 | 20.3 | 20.7 |
| 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 | 12.6 | 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) | 9.2 | 9.5 | 10.1 | 10.3 | 9.3 | 10.5 | 9.6 | 10.9 | 8.6 | 8.4 | 7.6 | 7.4 |
| Precipitation (mm) | 90 | 87 | 64 | 137 | 93 | 29 | 42 | 16 | 86 | 257 | 428 | 292 |
| Sunny days | 9 | 10 | 5 | 6 | 5 | 2 | 5 | 14 | 0 | 1 | 0 | 0 |
| Rainy days | 22 | 18 | 26 | 24 | 26 | 28 | 26 | 17 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Opalgala is at