Average annual temperature is 15.7 °C
Absolute maximum temperature: 36.0 °C
Absolute minimum temperature: -3.4 °C
Number of sunny days: 240 days
Number of rainy days: 125 days
Look at detailed online map of Helderhoek
* Weather data for Helderhoek South Africa is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 33.5 | 31.6 | 28.2 | 27.0 | 23.9 | 20.6 | 22.2 | 22.8 | 29.9 | 33.5 | 36.0 | 35.4 |
| Average daytime temperature (°C) | 29.1 | 26.4 | 25.6 | 22.6 | 18.2 | 14.5 | 15.4 | 19.0 | 22.3 | 25.9 | 28.9 | 28.1 |
| Average temperature (°C) | 21.9 | 19.9 | 18.6 | 15.0 | 11.4 | 7.9 | 8.2 | 11.2 | 14.5 | 17.9 | 21.4 | 20.8 |
| Average night temperature (°C) | 15.5 | 14.3 | 12.5 | 8.4 | 5.7 | 2.5 | 2.1 | 4.3 | 6.6 | 10.1 | 13.7 | 14.3 |
| Absolute minimum temperature (°C) | 8.2 | 9.3 | 6.9 | 2.8 | -0.9 | -0.9 | -3.4 | -2.8 | -0.7 | 4.6 | 5.0 | 10.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 |
| Daylight mean duration (h) | 13.8 | 13.1 | 12.3 | 11.4 | 10.6 | 10.3 | 10.4 | 11.1 | 11.9 | 12.8 | 13.6 | 14.0 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 12.4 | 10.5 | 10.6 | 10.1 | 8.9 | 9.0 | 9.0 | 10.0 | 10.2 | 10.9 | 11.8 | 11.6 |
| Precipitation (mm) | 76 | 87 | 38 | 18 | 49 | 7 | 5 | 0 | 19 | 33 | 15 | 117 |
| Sunny days | 14 | 11 | 9 | 24 | 19 | 25 | 25 | 30 | 26 | 22 | 23 | 12 |
| Rainy days | 17 | 17 | 22 | 6 | 12 | 5 | 6 | 1 | 4 | 9 | 7 | 19 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helderhoek is at