Average annual temperature is 17.7 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: 0.0 °C
Number of sunny days: 236 days
Number of rainy days: 129 days
Look at detailed online map of Trevallyn
* Weather data for Trevallyn 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) | 32.6 | 29.6 | 29.8 | 27.3 | 25.8 | 22.5 | 25.0 | 28.8 | 31.5 | 34.2 | 33.7 | 32.9 |
| Average daytime temperature (°C) | 28.3 | 25.0 | 26.1 | 24.5 | 20.6 | 19.5 | 18.2 | 22.1 | 27.1 | 27.8 | 28.0 | 27.7 |
| Average temperature (°C) | 22.0 | 19.9 | 20.0 | 17.8 | 14.0 | 12.1 | 10.7 | 13.9 | 19.0 | 20.1 | 21.2 | 21.5 |
| Average night temperature (°C) | 15.4 | 15.4 | 14.1 | 11.5 | 9.0 | 6.1 | 4.4 | 6.5 | 10.9 | 12.5 | 14.3 | 15.5 |
| Absolute minimum temperature (°C) | 12.1 | 12.3 | 11.2 | 6.6 | 4.7 | 3.2 | 0.0 | 1.6 | 4.0 | 6.5 | 5.6 | 11.8 |
| 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 | 11.5 | 10.8 | 10.5 | 10.7 | 11.2 | 11.9 | 12.7 | 13.4 | 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 | 9.5 | 10.6 | 10.4 | 9.3 | 9.6 | 9.5 | 10.3 | 10.9 | 10.1 | 10.9 | 11.1 |
| Precipitation (mm) | 63 | 143 | 15 | 6 | 59 | 3 | 2 | 0 | 7 | 51 | 28 | 64 |
| Sunny days | 14 | 6 | 17 | 25 | 17 | 28 | 26 | 30 | 27 | 20 | 15 | 11 |
| Rainy days | 17 | 22 | 14 | 5 | 14 | 2 | 5 | 1 | 3 | 11 | 15 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Trevallyn is at