Average annual temperature is 16.0 °C
Absolute maximum temperature: 32.5 °C
Absolute minimum temperature: -2.7 °C
Number of sunny days: 230 days
Number of rainy days: 135 days
Look at detailed online map of Heriotdale
* Weather data for Heriotdale 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) | 29.9 | 26.9 | 28.3 | 25.7 | 25.0 | 20.9 | 22.8 | 27.1 | 29.4 | 32.5 | 31.9 | 30.8 |
| Average daytime temperature (°C) | 26.0 | 23.3 | 24.3 | 22.9 | 18.8 | 17.7 | 16.3 | 20.5 | 25.2 | 25.7 | 26.3 | 25.8 |
| Average temperature (°C) | 19.9 | 18.1 | 18.2 | 16.1 | 12.5 | 10.5 | 9.3 | 12.5 | 17.2 | 18.2 | 19.6 | 19.7 |
| Average night temperature (°C) | 13.6 | 13.8 | 12.7 | 9.9 | 7.7 | 4.6 | 3.4 | 5.3 | 9.5 | 11.1 | 13.2 | 14.2 |
| Absolute minimum temperature (°C) | 10.3 | 10.8 | 9.8 | 5.3 | 0.8 | 0.9 | -2.7 | -1.3 | 1.7 | 4.2 | 3.2 | 10.0 |
| 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 | 11.5 | 10.8 | 10.5 | 10.7 | 11.2 | 11.9 | 12.7 | 13.4 | 13.7 |
| 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) | 11.6 | 8.8 | 10.4 | 10.4 | 9.1 | 9.6 | 9.5 | 10.2 | 10.8 | 10.0 | 10.7 | 10.9 |
| Precipitation (mm) | 68 | 171 | 27 | 12 | 58 | 5 | 1 | 0 | 8 | 57 | 40 | 94 |
| Sunny days | 14 | 6 | 13 | 26 | 17 | 28 | 28 | 31 | 27 | 20 | 12 | 8 |
| Rainy days | 17 | 22 | 18 | 4 | 14 | 2 | 3 | 0 | 3 | 11 | 18 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heriotdale is at