Average annual temperature is 18.8 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -1.8 °C
Number of sunny days: 279 days
Number of rainy days: 86 days
Look at detailed online map of Riet Vley
* Weather data for Riet Vley 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) | 34.6 | 33.9 | 30.8 | 27.6 | 27.0 | 22.9 | 24.8 | 26.8 | 32.2 | 35.6 | 37.0 | 36.4 |
| Average daytime temperature (°C) | 30.9 | 29.0 | 27.7 | 25.0 | 21.6 | 18.2 | 18.4 | 22.2 | 25.6 | 29.7 | 32.3 | 32.0 |
| Average temperature (°C) | 24.6 | 22.6 | 21.2 | 17.6 | 14.6 | 10.5 | 11.2 | 14.2 | 17.4 | 21.8 | 24.8 | 25.0 |
| Average night temperature (°C) | 17.5 | 16.3 | 14.9 | 10.9 | 7.8 | 3.8 | 4.8 | 6.6 | 9.1 | 13.5 | 16.9 | 18.0 |
| Absolute minimum temperature (°C) | 12.6 | 11.8 | 10.2 | 5.4 | 2.4 | 0.2 | -1.8 | 1.4 | 1.5 | 7.2 | 7.6 | 13.7 |
| 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 | 11.4 | 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) | 12.7 | 10.9 | 10.9 | 10.4 | 9.4 | 9.4 | 9.6 | 10.4 | 10.8 | 11.3 | 11.8 | 11.8 |
| Precipitation (mm) | 9 | 40 | 17 | 17 | 26 | 2 | 0 | 0 | 6 | 24 | 8 | 69 |
| Sunny days | 22 | 12 | 19 | 21 | 21 | 27 | 30 | 31 | 28 | 27 | 20 | 21 |
| Rainy days | 9 | 16 | 12 | 9 | 10 | 3 | 1 | 0 | 2 | 4 | 10 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Riet Vley is at