Average annual temperature is 15.2 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 235 days
Number of rainy days: 130 days
Look at detailed online map of Grootdam
* Weather data for Grootdam 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) | 32.2 | 30.5 | 28.5 | 25.9 | 24.0 | 20.8 | 21.8 | 23.8 | 29.9 | 33.3 | 34.5 | 33.2 |
| Average daytime temperature (°C) | 27.8 | 25.3 | 25.5 | 22.8 | 18.6 | 15.3 | 16.0 | 19.6 | 23.1 | 26.0 | 28.4 | 27.2 |
| Average temperature (°C) | 20.7 | 19.1 | 18.0 | 14.5 | 11.0 | 7.7 | 7.7 | 10.5 | 14.4 | 17.6 | 20.7 | 20.2 |
| Average night temperature (°C) | 14.3 | 13.8 | 11.7 | 7.3 | 4.9 | 1.4 | 0.9 | 2.1 | 6.0 | 9.5 | 12.7 | 14.0 |
| Absolute minimum temperature (°C) | 8.9 | 9.2 | 6.3 | 2.8 | -2.2 | -1.9 | -3.3 | -3.8 | -0.1 | 4.6 | 4.6 | 10.5 |
| 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 | 10.0 | 10.4 | 10.0 | 9.0 | 9.0 | 9.1 | 10.0 | 10.1 | 10.9 | 11.9 | 11.5 |
| Precipitation (mm) | 118 | 146 | 55 | 15 | 49 | 7 | 9 | 2 | 17 | 59 | 18 | 172 |
| Sunny days | 12 | 9 | 12 | 25 | 18 | 25 | 26 | 30 | 25 | 20 | 21 | 12 |
| Rainy days | 19 | 19 | 19 | 5 | 13 | 5 | 5 | 1 | 5 | 11 | 9 | 19 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grootdam is at