Average annual temperature is 15.5 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -3.5 °C
Number of sunny days: 233 days
Number of rainy days: 132 days
Look at detailed online map of Grootvlei
* Weather data for Grootvlei 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) | 33.8 | 31.5 | 29.3 | 26.6 | 24.7 | 21.4 | 22.7 | 24.2 | 31.5 | 33.9 | 37.0 | 35.5 |
| Average daytime temperature (°C) | 28.8 | 26.4 | 26.3 | 22.6 | 18.6 | 15.5 | 16.4 | 20.2 | 23.5 | 26.7 | 29.8 | 28.5 |
| Average temperature (°C) | 21.1 | 19.8 | 18.6 | 14.3 | 10.9 | 7.8 | 8.0 | 10.7 | 14.8 | 17.8 | 21.3 | 20.9 |
| Average night temperature (°C) | 14.5 | 14.0 | 12.3 | 7.6 | 5.0 | 2.0 | 1.6 | 2.7 | 6.3 | 9.6 | 13.1 | 14.3 |
| Absolute minimum temperature (°C) | 8.2 | 9.3 | 6.2 | 2.5 | -2.4 | -1.3 | -3.5 | -3.4 | -0.6 | 4.6 | 5.9 | 10.9 |
| 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 | 10.2 | 10.4 | 11.0 | 11.9 | 12.8 | 13.6 | 14.1 |
| 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 | 10.3 | 10.6 | 10.0 | 8.8 | 8.9 | 9.1 | 10.0 | 10.1 | 11.1 | 11.8 | 11.6 |
| Precipitation (mm) | 137 | 120 | 64 | 17 | 70 | 14 | 8 | 4 | 31 | 30 | 26 | 133 |
| Sunny days | 12 | 10 | 12 | 23 | 19 | 26 | 24 | 27 | 27 | 22 | 19 | 12 |
| Rainy days | 19 | 18 | 19 | 7 | 12 | 4 | 7 | 4 | 3 | 9 | 11 | 19 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grootvlei is at