Average annual temperature is 27.0 °C
Absolute maximum temperature: 38.0 °C
Absolute minimum temperature: 17.4 °C
Number of sunny days: 53 days
Number of rainy days: 312 days
Look at detailed online map of Balaharuwa
* Weather data for Balaharuwa 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) | 33.5 | 34.3 | 36.0 | 36.9 | 37.7 | 36.9 | 36.2 | 38.0 | 32.7 | 31.7 | 31.0 | 30.5 |
| Average daytime temperature (°C) | 31.3 | 31.5 | 33.0 | 34.1 | 32.9 | 35.3 | 34.2 | 36.1 | 30.9 | 29.9 | 29.7 | 29.2 |
| Average temperature (°C) | 25.8 | 26.1 | 27.0 | 27.5 | 28.0 | 29.5 | 28.9 | 29.6 | 26.4 | 25.2 | 25.0 | 25.4 |
| Average night temperature (°C) | 21.0 | 21.9 | 23.2 | 23.4 | 24.8 | 25.9 | 25.3 | 25.3 | 23.9 | 22.7 | 22.4 | 22.9 |
| Absolute minimum temperature (°C) | 17.4 | 20.0 | 21.7 | 22.3 | 23.4 | 24.9 | 23.1 | 23.5 | 23.1 | 21.6 | 21.8 | 21.9 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| 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 | 10.0 | 9.9 | 9.7 | 9.4 | 10.9 | 10.3 | 11.1 | 9.3 | 7.7 | 7.6 | 8.1 |
| Precipitation (mm) | 90 | 97 | 119 | 154 | 150 | 37 | 33 | 45 | 191 | 447 | 536 | 306 |
| Sunny days | 14 | 10 | 2 | 1 | 3 | 4 | 8 | 7 | 0 | 0 | 0 | 4 |
| Rainy days | 17 | 18 | 29 | 29 | 28 | 26 | 23 | 24 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Balaharuwa is at