Average annual temperature is 26.7 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: 19.1 °C
Number of sunny days: 67 days
Number of rainy days: 298 days
Look at detailed online map of Helambawewa
* Weather data for Helambawewa 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) | 30.0 | 32.1 | 34.4 | 35.5 | 34.3 | 33.8 | 36.3 | 37.3 | 33.7 | 33.4 | 32.0 | 30.6 |
| Average daytime temperature (°C) | 28.7 | 30.1 | 32.1 | 33.8 | 31.8 | 32.5 | 32.4 | 35.1 | 31.6 | 31.4 | 30.3 | 29.2 |
| Average temperature (°C) | 24.1 | 25.0 | 26.7 | 27.7 | 27.6 | 28.2 | 28.1 | 28.9 | 27.0 | 26.0 | 25.4 | 25.4 |
| Average night temperature (°C) | 20.7 | 21.2 | 23.0 | 23.8 | 24.7 | 25.3 | 25.2 | 25.1 | 24.0 | 23.2 | 22.8 | 22.9 |
| Absolute minimum temperature (°C) | 19.1 | 19.2 | 21.7 | 22.5 | 23.4 | 24.1 | 24.2 | 24.4 | 23.1 | 22.1 | 22.0 | 22.3 |
| 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 | 11.9 | 11.7 | 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 | 9.8 | 10.7 | 10.4 | 8.9 | 10.5 | 9.6 | 11.0 | 9.6 | 8.6 | 7.1 | 7.7 |
| Precipitation (mm) | 65 | 116 | 97 | 109 | 104 | 26 | 32 | 38 | 91 | 288 | 408 | 254 |
| Sunny days | 18 | 13 | 5 | 5 | 1 | 3 | 5 | 15 | 0 | 1 | 0 | 1 |
| Rainy days | 13 | 15 | 26 | 25 | 30 | 27 | 26 | 16 | 30 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helambawewa is at