Average annual temperature is 15.1 °C
Absolute maximum temperature: 36.2 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 236 days
Number of rainy days: 129 days
Look at detailed online map of Heelfontein
* Weather data for Heelfontein 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) | 32.2 | 30.8 | 28.0 | 25.7 | 23.8 | 21.0 | 21.2 | 23.2 | 29.4 | 32.4 | 36.2 | 33.6 |
| Average daytime temperature (°C) | 28.0 | 25.3 | 25.0 | 22.3 | 18.0 | 14.8 | 15.3 | 18.8 | 22.4 | 25.7 | 28.8 | 27.3 |
| Average temperature (°C) | 20.8 | 19.1 | 17.9 | 14.6 | 11.0 | 7.3 | 7.5 | 10.5 | 14.1 | 17.5 | 21.1 | 20.2 |
| Average night temperature (°C) | 14.4 | 13.8 | 11.9 | 7.6 | 5.1 | 1.3 | 1.0 | 3.0 | 6.3 | 9.7 | 13.1 | 14.0 |
| Absolute minimum temperature (°C) | 8.5 | 9.4 | 7.4 | 3.2 | -1.2 | -2.2 | -3.8 | -2.5 | -0.6 | 5.3 | 4.1 | 9.3 |
| 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 | 10.5 | 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) | 12.3 | 10.2 | 10.5 | 10.0 | 9.0 | 8.9 | 9.0 | 10.0 | 10.1 | 10.9 | 11.8 | 11.4 |
| Precipitation (mm) | 101 | 85 | 57 | 16 | 40 | 5 | 9 | 4 | 20 | 40 | 10 | 142 |
| Sunny days | 14 | 8 | 12 | 23 | 19 | 25 | 26 | 29 | 25 | 22 | 22 | 11 |
| Rainy days | 17 | 20 | 19 | 7 | 12 | 5 | 5 | 2 | 5 | 9 | 8 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heelfontein is at