Average annual temperature is 16.4 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -2.1 °C
Number of sunny days: 241 days
Number of rainy days: 124 days
Look at detailed online map of Heilbron
* Weather data for Heilbron 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) | 30.1 | 28.1 | 28.2 | 25.7 | 25.3 | 23.1 | 23.3 | 26.6 | 31.2 | 34.0 | 34.3 | 34.3 |
| Average daytime temperature (°C) | 26.9 | 23.9 | 25.1 | 23.1 | 19.3 | 17.3 | 17.0 | 20.6 | 25.5 | 26.5 | 28.5 | 27.1 |
| Average temperature (°C) | 20.9 | 18.9 | 18.9 | 16.1 | 12.7 | 9.6 | 9.6 | 12.6 | 17.0 | 18.9 | 21.3 | 20.8 |
| Average night temperature (°C) | 14.9 | 14.5 | 13.4 | 9.5 | 7.3 | 3.2 | 3.3 | 5.1 | 8.7 | 11.7 | 14.1 | 15.0 |
| Absolute minimum temperature (°C) | 10.6 | 9.5 | 11.0 | 5.1 | 1.9 | -0.3 | -2.1 | -0.4 | 2.0 | 4.3 | 3.7 | 10.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.6 | 13.0 | 12.2 | 11.4 | 10.8 | 10.4 | 10.6 | 11.2 | 11.9 | 12.7 | 13.5 | 13.8 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 12.2 | 9.0 | 10.5 | 10.4 | 9.4 | 9.6 | 9.3 | 10.1 | 10.8 | 10.2 | 11.0 | 10.3 |
| Precipitation (mm) | 31 | 131 | 40 | 3 | 35 | 0 | 2 | 0 | 7 | 59 | 35 | 116 |
| Sunny days | 16 | 7 | 13 | 25 | 19 | 28 | 27 | 30 | 26 | 20 | 17 | 13 |
| Rainy days | 15 | 21 | 18 | 5 | 12 | 2 | 4 | 1 | 4 | 11 | 13 | 18 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heilbron is at