Average annual temperature is 24.0 °C
Absolute maximum temperature: 33.3 °C
Absolute minimum temperature: 16.0 °C
Number of sunny days: 41 days
Number of rainy days: 324 days
Look at detailed online map of Owissa
* Weather data for Owissa 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) | 28.5 | 30.0 | 32.5 | 33.3 | 30.5 | 28.9 | 28.5 | 30.6 | 28.7 | 29.5 | 29.0 | 29.4 |
| Average daytime temperature (°C) | 27.2 | 28.3 | 30.0 | 30.9 | 28.5 | 27.7 | 26.9 | 29.0 | 27.1 | 27.2 | 27.7 | 27.6 |
| Average temperature (°C) | 22.6 | 23.6 | 24.7 | 25.2 | 24.7 | 24.4 | 23.9 | 24.6 | 23.5 | 23.3 | 23.4 | 23.8 |
| Average night temperature (°C) | 18.7 | 19.5 | 20.7 | 20.9 | 21.8 | 21.9 | 21.4 | 21.0 | 21.0 | 20.7 | 20.9 | 21.1 |
| Absolute minimum temperature (°C) | 16.0 | 16.6 | 19.3 | 19.4 | 20.8 | 21.1 | 19.9 | 19.6 | 19.6 | 19.1 | 20.0 | 19.8 |
| 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) | 9.4 | 9.7 | 10.2 | 10.1 | 9.2 | 10.3 | 9.3 | 10.8 | 8.6 | 7.7 | 7.3 | 7.9 |
| Precipitation (mm) | 42 | 46 | 56 | 154 | 168 | 170 | 211 | 72 | 260 | 488 | 759 | 300 |
| Sunny days | 14 | 11 | 3 | 3 | 1 | 0 | 0 | 3 | 0 | 2 | 0 | 4 |
| Rainy days | 17 | 17 | 28 | 27 | 30 | 30 | 31 | 28 | 30 | 29 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Owissa is at