Average annual temperature is 26.0 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 55 days
Number of rainy days: 310 days
Look at detailed online map of Helathunthala
* Weather data for Helathunthala 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) | 29.0 | 29.9 | 32.7 | 35.1 | 35.7 | 36.5 | 37.4 | 39.0 | 33.6 | 30.3 | 29.5 | 29.0 |
| Average daytime temperature (°C) | 27.7 | 28.1 | 29.5 | 31.7 | 31.6 | 35.1 | 33.8 | 36.1 | 31.2 | 28.7 | 28.3 | 27.7 |
| Average temperature (°C) | 24.0 | 24.3 | 25.2 | 26.3 | 26.7 | 28.6 | 27.8 | 28.9 | 26.1 | 24.6 | 24.4 | 24.5 |
| Average night temperature (°C) | 21.1 | 21.4 | 22.1 | 22.5 | 23.0 | 23.8 | 23.2 | 23.4 | 22.8 | 21.9 | 21.9 | 22.4 |
| Absolute minimum temperature (°C) | 18.7 | 19.2 | 21.1 | 21.1 | 21.7 | 22.8 | 22.2 | 22.4 | 21.3 | 20.6 | 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) | 9.3 | 9.4 | 9.6 | 10.0 | 9.3 | 10.5 | 9.9 | 10.9 | 9.2 | 8.2 | 7.2 | 7.6 |
| Precipitation (mm) | 69 | 153 | 97 | 145 | 107 | 45 | 59 | 29 | 104 | 416 | 539 | 336 |
| Sunny days | 14 | 10 | 3 | 1 | 8 | 2 | 7 | 7 | 1 | 0 | 0 | 2 |
| Rainy days | 17 | 18 | 28 | 29 | 23 | 28 | 24 | 24 | 29 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helathunthala is at