Average annual temperature is 12.5 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -4.7 °C
Number of sunny days: 192 days
Number of rainy days: 169 days
Number of snow days: 4 days
Look at detailed online map of Rocklyn
* Weather data for Rocklyn 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) | 31.9 | 28.3 | 26.8 | 24.8 | 21.5 | 16.6 | 18.3 | 20.7 | 28.1 | 29.1 | 34.2 | 31.9 |
| Average daytime temperature (°C) | 25.2 | 22.8 | 23.1 | 19.5 | 14.3 | 11.1 | 11.9 | 16.2 | 18.5 | 20.4 | 26.2 | 24.6 |
| Average temperature (°C) | 18.3 | 16.5 | 15.8 | 12.6 | 8.4 | 5.5 | 5.8 | 8.9 | 11.3 | 12.7 | 18.1 | 16.5 |
| Average night temperature (°C) | 12.4 | 11.3 | 10.1 | 6.6 | 3.8 | 1.1 | 0.5 | 2.4 | 4.3 | 6.1 | 10.3 | 10.2 |
| Absolute minimum temperature (°C) | 5.5 | 6.0 | 2.9 | 0.1 | -1.5 | -3.2 | -4.4 | -4.5 | -4.7 | -1.3 | 2.8 | 6.0 |
| 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 | 14.0 | 14.0 |
| Daylight mean duration (h) | 13.9 | 13.2 | 12.3 | 11.3 | 10.5 | 10.1 | 10.3 | 11.0 | 11.9 | 12.9 | 13.7 | 14.2 |
| 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 | 14.0 |
| Sunshine mean duration (h) | 11.5 | 10.8 | 10.7 | 9.9 | 8.1 | 8.6 | 8.7 | 9.8 | 9.8 | 10.5 | 11.8 | 11.1 |
| Precipitation (mm) | 116 | 112 | 37 | 16 | 102 | 11 | 15 | 6 | 52 | 38 | 49 | 122 |
| Sunny days | 8 | 6 | 8 | 21 | 20 | 23 | 22 | 27 | 23 | 14 | 16 | 4 |
| Rainy days | 23 | 22 | 23 | 9 | 11 | 7 | 6 | 3 | 7 | 17 | 14 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rocklyn is at