Average annual temperature is 13.4 °C
Absolute maximum temperature: 33.6 °C
Absolute minimum temperature: -5.7 °C
Number of sunny days: 189 days
Number of rainy days: 175 days
Number of snow days: 1 day
Look at detailed online map of Siyalweni
* Weather data for Siyalweni 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) | 31.6 | 29.7 | 27.7 | 25.1 | 23.9 | 21.3 | 21.9 | 23.8 | 30.2 | 32.1 | 33.6 | 31.7 |
| Average daytime temperature (°C) | 25.3 | 23.1 | 23.8 | 21.6 | 16.6 | 15.6 | 15.1 | 19.2 | 22.1 | 21.3 | 26.2 | 24.2 |
| Average temperature (°C) | 18.3 | 17.1 | 16.7 | 13.7 | 9.6 | 8.2 | 6.5 | 9.5 | 12.7 | 13.5 | 18.0 | 17.0 |
| Average night temperature (°C) | 11.7 | 12.3 | 11.1 | 6.4 | 3.8 | 2.1 | -0.5 | 0.6 | 4.3 | 6.9 | 10.6 | 11.7 |
| Absolute minimum temperature (°C) | 6.8 | 9.7 | 5.7 | 0.7 | -2.7 | -2.5 | -4.7 | -5.7 | -1.6 | 1.1 | 0.4 | 7.7 |
| 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) | 13.9 | 13.2 | 12.3 | 11.3 | 10.6 | 10.2 | 10.4 | 11.0 | 11.9 | 12.8 | 13.7 | 14.1 |
| 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) | 10.7 | 9.0 | 9.8 | 9.6 | 7.7 | 8.7 | 8.7 | 9.9 | 10.2 | 8.8 | 10.9 | 8.9 |
| Precipitation (mm) | 166 | 170 | 59 | 4 | 83 | 11 | 13 | 0 | 16 | 103 | 22 | 181 |
| Sunny days | 8 | 6 | 7 | 23 | 15 | 23 | 26 | 30 | 24 | 12 | 11 | 4 |
| Rainy days | 23 | 22 | 24 | 7 | 16 | 7 | 4 | 1 | 6 | 19 | 19 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siyalweni is at