Average annual temperature is 25.4 °C
Absolute maximum temperature: 32.2 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 15 days
Number of rainy days: 350 days
Look at detailed online map of Helamba
* Weather data for Helamba 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 | 31.3 | 31.6 | 32.2 | 30.7 | 30.0 | 29.7 | 29.8 | 29.9 | 30.4 | 30.5 | 30.7 |
| Average daytime temperature (°C) | 29.1 | 29.4 | 30.2 | 30.9 | 29.3 | 28.8 | 28.4 | 29.1 | 28.2 | 28.6 | 29.1 | 29.3 |
| Average temperature (°C) | 24.3 | 24.9 | 25.5 | 26.2 | 26.1 | 25.8 | 25.8 | 26.1 | 24.9 | 24.8 | 24.8 | 25.1 |
| Average night temperature (°C) | 20.4 | 21.4 | 22.1 | 22.9 | 23.7 | 23.4 | 23.4 | 23.4 | 22.7 | 22.4 | 22.1 | 22.2 |
| Absolute minimum temperature (°C) | 17.5 | 20.5 | 20.6 | 21.5 | 22.6 | 22.2 | 21.9 | 22.5 | 22.1 | 21.2 | 21.5 | 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) | 9.6 | 9.7 | 10.1 | 10.1 | 8.2 | 9.0 | 9.3 | 10.7 | 6.6 | 6.7 | 7.1 | 7.6 |
| Precipitation (mm) | 124 | 111 | 245 | 200 | 246 | 359 | 324 | 179 | 678 | 652 | 667 | 452 |
| Sunny days | 10 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainy days | 21 | 24 | 31 | 29 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helamba is at