Average annual temperature is 26.0 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: 15.9 °C
Number of sunny days: 63 days
Number of rainy days: 302 days
Look at detailed online map of Helaarawa
* Weather data for Helaarawa 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) | 28.1 | 28.8 | 31.6 | 33.4 | 34.4 | 36.0 | 37.0 | 38.8 | 35.7 | 32.9 | 30.6 | 30.5 |
| Average daytime temperature (°C) | 26.3 | 27.4 | 28.9 | 31.2 | 32.0 | 34.8 | 34.5 | 36.8 | 33.4 | 30.3 | 28.9 | 27.8 |
| Average temperature (°C) | 22.8 | 23.6 | 24.6 | 25.9 | 26.8 | 29.0 | 28.8 | 29.2 | 27.1 | 25.2 | 24.5 | 24.3 |
| Average night temperature (°C) | 19.6 | 20.1 | 21.1 | 21.7 | 22.7 | 24.1 | 24.0 | 23.6 | 23.2 | 22.2 | 21.8 | 22.1 |
| Absolute minimum temperature (°C) | 16.5 | 15.9 | 19.7 | 20.4 | 21.2 | 22.6 | 22.1 | 22.3 | 22.2 | 21.0 | 20.2 | 20.4 |
| 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) | 7.7 | 8.4 | 8.7 | 10.2 | 9.4 | 10.7 | 9.6 | 10.8 | 8.7 | 8.1 | 7.3 | 6.4 |
| Precipitation (mm) | 226 | 160 | 164 | 113 | 134 | 30 | 17 | 84 | 112 | 409 | 554 | 461 |
| Sunny days | 6 | 5 | 7 | 7 | 8 | 7 | 11 | 7 | 4 | 1 | 0 | 0 |
| Rainy days | 25 | 23 | 24 | 23 | 23 | 23 | 20 | 24 | 26 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helaarawa is at