Average annual temperature is 16.0 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: -3.4 °C
Number of sunny days: 235 days
Number of rainy days: 130 days
Look at detailed online map of Grootfontein
* Weather data for Grootfontein 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 | 32.4 | 28.7 | 27.0 | 24.2 | 21.3 | 22.3 | 23.2 | 30.3 | 33.8 | 36.6 | 35.9 |
| Average daytime temperature (°C) | 29.4 | 26.8 | 25.9 | 23.0 | 18.7 | 15.1 | 15.9 | 19.4 | 22.7 | 26.3 | 29.4 | 28.5 |
| Average temperature (°C) | 22.3 | 20.3 | 19.0 | 15.3 | 11.7 | 8.2 | 8.5 | 11.3 | 14.8 | 18.3 | 21.7 | 21.2 |
| Average night temperature (°C) | 15.8 | 14.7 | 12.9 | 8.4 | 6.0 | 2.6 | 2.1 | 4.2 | 7.1 | 10.5 | 13.9 | 14.8 |
| Absolute minimum temperature (°C) | 8.8 | 10.0 | 7.8 | 3.1 | -0.7 | -1.2 | -3.4 | -1.9 | -0.2 | 5.2 | 5.2 | 11.2 |
| 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 | 13.0 | 14.0 |
| Daylight mean duration (h) | 13.8 | 13.1 | 12.3 | 11.4 | 10.6 | 10.3 | 10.4 | 11.1 | 11.9 | 12.8 | 13.6 | 14.0 |
| 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) | 12.2 | 10.5 | 10.5 | 10.2 | 8.9 | 9.0 | 9.0 | 10.0 | 10.3 | 10.8 | 11.8 | 11.4 |
| Precipitation (mm) | 89 | 81 | 61 | 16 | 56 | 9 | 7 | 0 | 25 | 36 | 14 | 134 |
| Sunny days | 13 | 9 | 8 | 24 | 19 | 25 | 27 | 30 | 25 | 22 | 21 | 12 |
| Rainy days | 18 | 19 | 23 | 6 | 12 | 5 | 4 | 1 | 5 | 9 | 9 | 19 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grootfontein is at