Average annual temperature is 20.4 °C
Absolute maximum temperature: 38.3 °C
Absolute minimum temperature: 2.6 °C
Number of sunny days: 275 days
Number of rainy days: 90 days
Look at detailed online map of Sleutelfontein
* Weather data for Sleutelfontein 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) | 37.1 | 33.0 | 34.5 | 30.0 | 29.2 | 25.9 | 26.5 | 33.5 | 37.1 | 37.0 | 38.3 | 37.9 |
| Average daytime temperature (°C) | 31.5 | 28.3 | 30.1 | 26.6 | 23.5 | 22.1 | 21.0 | 25.1 | 30.7 | 30.8 | 31.5 | 30.7 |
| Average temperature (°C) | 25.1 | 22.9 | 23.8 | 19.7 | 16.8 | 14.0 | 13.0 | 16.7 | 22.0 | 22.8 | 24.2 | 24.2 |
| Average night temperature (°C) | 18.8 | 18.5 | 17.8 | 13.6 | 11.5 | 7.2 | 6.1 | 8.9 | 13.5 | 15.5 | 17.4 | 18.4 |
| Absolute minimum temperature (°C) | 15.2 | 16.2 | 14.1 | 9.7 | 6.0 | 4.5 | 2.6 | 3.8 | 9.6 | 10.4 | 9.5 | 13.9 |
| 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) | 13.5 | 12.9 | 12.2 | 11.5 | 10.9 | 10.6 | 10.7 | 11.3 | 11.9 | 12.7 | 13.3 | 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) | 11.8 | 10.2 | 10.3 | 10.3 | 9.1 | 9.7 | 9.5 | 10.1 | 10.8 | 10.1 | 11.2 | 10.8 |
| Precipitation (mm) | 45 | 116 | 42 | 2 | 55 | 4 | 14 | 0 | 7 | 77 | 32 | 99 |
| Sunny days | 23 | 11 | 20 | 27 | 21 | 27 | 27 | 31 | 27 | 25 | 21 | 15 |
| Rainy days | 8 | 17 | 11 | 3 | 10 | 3 | 4 | 0 | 3 | 6 | 9 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sleutelfontein is at