Average annual temperature is 25.3 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: 17.6 °C
Number of sunny days: 26 days
Number of rainy days: 339 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) | 30.7 | 33.2 | 33.9 | 34.9 | 32.5 | 30.5 | 30.0 | 31.0 | 30.0 | 31.0 | 30.6 | 31.9 |
| Average daytime temperature (°C) | 29.4 | 30.5 | 31.7 | 32.7 | 29.9 | 29.1 | 28.7 | 29.8 | 28.1 | 28.8 | 29.3 | 29.4 |
| Average temperature (°C) | 24.3 | 25.1 | 25.9 | 26.6 | 26.1 | 25.6 | 25.4 | 26.0 | 24.5 | 24.6 | 24.6 | 25.0 |
| Average night temperature (°C) | 20.4 | 20.7 | 22.1 | 22.8 | 23.9 | 23.3 | 22.9 | 23.3 | 22.6 | 22.2 | 21.9 | 22.3 |
| Absolute minimum temperature (°C) | 17.6 | 18.2 | 21.3 | 20.9 | 22.6 | 22.0 | 21.2 | 22.5 | 21.7 | 21.3 | 20.5 | 21.4 |
| 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 | 11.7 |
| 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 | 9.6 | 10.1 | 9.9 | 8.5 | 8.5 | 8.9 | 10.7 | 6.8 | 6.9 | 7.1 | 7.6 |
| Precipitation (mm) | 104 | 73 | 147 | 156 | 229 | 287 | 273 | 93 | 536 | 485 | 562 | 382 |
| Sunny days | 14 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 |
| Rainy days | 17 | 20 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Balaharuwa is at