Average annual temperature is 14.9 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: -3.0 °C
Number of sunny days: 211 days
Number of rainy days: 153 days
Number of snow days: 1 day
Look at detailed online map of Blenheim
* Weather data for Blenheim 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) | 34.1 | 31.1 | 28.8 | 26.9 | 24.3 | 20.2 | 22.1 | 23.9 | 30.4 | 31.9 | 37.1 | 33.5 |
| Average daytime temperature (°C) | 27.2 | 24.9 | 25.5 | 21.9 | 17.1 | 14.4 | 14.9 | 19.2 | 21.2 | 22.0 | 28.2 | 25.9 |
| Average temperature (°C) | 20.4 | 18.7 | 18.4 | 15.0 | 11.1 | 8.9 | 8.6 | 11.5 | 13.6 | 14.6 | 20.2 | 18.3 |
| Average night temperature (°C) | 13.9 | 13.4 | 12.2 | 8.8 | 6.1 | 4.2 | 3.0 | 4.3 | 5.9 | 8.0 | 12.1 | 12.4 |
| Absolute minimum temperature (°C) | 6.9 | 8.3 | 4.7 | 1.5 | 0.2 | 0.3 | -2.9 | -2.4 | -3.0 | 1.5 | 3.7 | 8.9 |
| 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) | 10.9 | 10.1 | 10.6 | 9.7 | 7.9 | 8.7 | 8.7 | 9.7 | 9.7 | 9.9 | 11.4 | 10.1 |
| Precipitation (mm) | 93 | 148 | 34 | 24 | 53 | 10 | 20 | 3 | 35 | 31 | 29 | 99 |
| Sunny days | 10 | 7 | 13 | 23 | 20 | 22 | 22 | 28 | 24 | 15 | 19 | 8 |
| Rainy days | 21 | 21 | 18 | 7 | 11 | 8 | 8 | 3 | 6 | 16 | 11 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Blenheim is at