Average annual temperature is 15.5 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: -3.5 °C
Number of sunny days: 211 days
Number of rainy days: 152 days
Number of snow days: 2 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) | 35.6 | 32.5 | 31.1 | 29.2 | 24.4 | 20.1 | 22.0 | 24.4 | 30.7 | 32.6 | 37.4 | 36.1 |
| Average daytime temperature (°C) | 29.1 | 26.1 | 26.9 | 22.7 | 17.4 | 14.5 | 14.9 | 19.3 | 20.5 | 22.4 | 29.0 | 27.5 |
| Average temperature (°C) | 21.7 | 19.5 | 19.3 | 15.7 | 11.4 | 9.1 | 9.0 | 12.1 | 13.5 | 15.0 | 20.6 | 19.4 |
| Average night temperature (°C) | 14.7 | 13.7 | 12.8 | 9.2 | 6.1 | 4.6 | 3.8 | 5.6 | 6.6 | 8.2 | 12.0 | 12.9 |
| Absolute minimum temperature (°C) | 6.6 | 8.4 | 5.8 | 2.3 | 0.4 | 0.0 | -1.8 | -2.6 | -3.5 | 1.8 | 5.3 | 9.2 |
| 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 | 14.0 | 14.0 |
| Daylight mean duration (h) | 13.9 | 13.2 | 12.3 | 11.3 | 10.5 | 10.1 | 10.3 | 11.0 | 11.9 | 12.9 | 13.7 | 14.2 |
| 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 | 14.0 |
| Sunshine mean duration (h) | 11.4 | 10.7 | 10.9 | 9.6 | 7.8 | 8.6 | 8.8 | 9.8 | 9.7 | 10.7 | 11.7 | 11.4 |
| Precipitation (mm) | 132 | 93 | 37 | 20 | 121 | 19 | 15 | 4 | 71 | 41 | 23 | 75 |
| Sunny days | 10 | 11 | 14 | 22 | 17 | 22 | 22 | 26 | 22 | 20 | 17 | 8 |
| Rainy days | 21 | 17 | 17 | 8 | 14 | 8 | 7 | 5 | 8 | 11 | 13 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heilbron is at