Average annual temperature is 26.9 °C
Absolute maximum temperature: 39.5 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 54 days
Number of rainy days: 311 days
Look at detailed online map of Omuna
* Weather data for Omuna 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) | 29.2 | 30.2 | 33.4 | 35.5 | 35.6 | 37.6 | 39.1 | 39.5 | 37.0 | 32.5 | 30.9 | 31.1 |
| Average daytime temperature (°C) | 27.7 | 28.5 | 30.3 | 32.9 | 33.1 | 36.0 | 36.4 | 37.8 | 33.7 | 30.6 | 29.3 | 28.7 |
| Average temperature (°C) | 23.8 | 24.4 | 25.8 | 27.3 | 27.8 | 29.8 | 30.0 | 30.0 | 27.6 | 25.7 | 25.2 | 25.0 |
| Average night temperature (°C) | 20.9 | 21.3 | 22.5 | 23.3 | 24.1 | 25.4 | 25.3 | 24.8 | 24.1 | 23.0 | 22.8 | 22.8 |
| Absolute minimum temperature (°C) | 18.7 | 19.1 | 21.9 | 21.9 | 23.3 | 24.6 | 24.0 | 23.9 | 22.8 | 22.1 | 22.2 | 22.0 |
| 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) | 8.7 | 9.3 | 9.7 | 10.4 | 9.2 | 10.7 | 9.7 | 10.8 | 8.9 | 8.5 | 7.1 | 6.9 |
| Precipitation (mm) | 163 | 132 | 89 | 112 | 158 | 35 | 35 | 63 | 311 | 499 | 466 | 421 |
| Sunny days | 5 | 8 | 6 | 7 | 6 | 2 | 9 | 9 | 2 | 0 | 0 | 0 |
| Rainy days | 26 | 20 | 25 | 23 | 25 | 28 | 22 | 22 | 28 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Omuna is at