Average annual temperature is 16.3 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -3.4 °C
Number of sunny days: 236 days
Number of rainy days: 129 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) | 31.3 | 27.5 | 28.7 | 26.5 | 26.7 | 22.9 | 22.7 | 27.5 | 31.8 | 33.5 | 33.0 | 31.7 |
| Average daytime temperature (°C) | 27.5 | 23.9 | 25.4 | 23.7 | 19.5 | 17.7 | 16.8 | 21.0 | 25.9 | 25.9 | 27.7 | 26.2 |
| Average temperature (°C) | 20.9 | 18.6 | 18.8 | 16.3 | 12.7 | 9.8 | 9.1 | 12.7 | 17.4 | 18.3 | 20.5 | 20.2 |
| Average night temperature (°C) | 14.2 | 14.4 | 12.7 | 9.3 | 7.1 | 3.3 | 2.4 | 4.8 | 9.1 | 11.0 | 13.5 | 14.7 |
| Absolute minimum temperature (°C) | 10.5 | 11.1 | 9.3 | 3.7 | 0.9 | -0.5 | -2.4 | -3.4 | 2.3 | 4.1 | 3.4 | 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 | 11.5 | 10.8 | 10.5 | 10.6 | 11.2 | 11.9 | 12.7 | 13.4 | 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) | 11.9 | 9.0 | 10.6 | 10.3 | 9.4 | 9.5 | 9.5 | 10.1 | 10.9 | 9.9 | 10.9 | 10.9 |
| Precipitation (mm) | 38 | 150 | 14 | 14 | 52 | 10 | 1 | 0 | 6 | 53 | 35 | 107 |
| Sunny days | 16 | 6 | 15 | 23 | 21 | 27 | 28 | 30 | 28 | 19 | 13 | 10 |
| Rainy days | 15 | 22 | 16 | 7 | 10 | 3 | 3 | 1 | 2 | 12 | 17 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grootvlei is at