Average annual temperature is 23.0 °C
Absolute maximum temperature: 41.1 °C
Absolute minimum temperature: 5.8 °C
Number of sunny days: 269 days
Number of rainy days: 96 days
Look at detailed online map of Swartwater
* Weather data for Swartwater 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) | 37.0 | 32.3 | 34.8 | 33.9 | 32.1 | 31.6 | 29.0 | 35.5 | 38.0 | 38.7 | 41.1 | 40.3 |
| Average daytime temperature (°C) | 31.8 | 28.7 | 30.8 | 30.2 | 27.5 | 26.2 | 22.9 | 26.3 | 31.7 | 32.2 | 34.1 | 31.5 |
| Average temperature (°C) | 26.0 | 23.7 | 24.8 | 23.7 | 21.1 | 18.5 | 16.3 | 19.4 | 24.2 | 24.9 | 27.4 | 25.7 |
| Average night temperature (°C) | 20.4 | 19.7 | 18.9 | 17.3 | 15.5 | 11.5 | 10.2 | 12.9 | 17.1 | 18.0 | 20.9 | 20.3 |
| Absolute minimum temperature (°C) | 16.6 | 16.5 | 14.6 | 12.8 | 10.4 | 7.4 | 5.8 | 6.6 | 12.1 | 11.8 | 13.0 | 16.2 |
| 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 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.4 | 12.9 | 12.2 | 11.6 | 11.0 | 10.8 | 10.9 | 11.3 | 12.0 | 12.6 | 13.2 | 13.5 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 |
| Sunshine mean duration (h) | 11.4 | 9.9 | 10.8 | 10.3 | 9.4 | 9.7 | 9.5 | 10.2 | 10.1 | 10.5 | 10.9 | 10.2 |
| Precipitation (mm) | 30 | 118 | 2 | 1 | 8 | 0 | 3 | 1 | 7 | 27 | 6 | 130 |
| Sunny days | 14 | 6 | 24 | 29 | 24 | 29 | 27 | 27 | 25 | 24 | 21 | 19 |
| Rainy days | 17 | 22 | 7 | 1 | 7 | 1 | 4 | 4 | 5 | 7 | 9 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Swartwater is at