Average annual temperature is 17.4 °C
Absolute maximum temperature: 39.9 °C
Absolute minimum temperature: 5.4 °C
Number of sunny days: 176 days
Number of rainy days: 189 days
Look at detailed online map of Grahamstown
* Weather data for Grahamstown 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) | 37.1 | 32.7 | 34.4 | 34.8 | 30.6 | 24.8 | 25.7 | 31.9 | 36.9 | 30.8 | 34.6 | 39.9 |
| Average daytime temperature (°C) | 28.0 | 26.5 | 26.2 | 24.7 | 19.9 | 18.0 | 18.2 | 21.8 | 21.2 | 20.2 | 25.7 | 24.9 |
| Average temperature (°C) | 22.3 | 21.1 | 20.2 | 18.6 | 15.3 | 13.6 | 13.0 | 15.8 | 14.8 | 15.6 | 19.1 | 19.2 |
| Average night temperature (°C) | 17.4 | 17.3 | 15.9 | 13.9 | 11.6 | 10.1 | 8.5 | 10.9 | 10.1 | 11.6 | 13.8 | 14.8 |
| Absolute minimum temperature (°C) | 11.5 | 12.9 | 10.3 | 9.5 | 7.6 | 6.2 | 5.4 | 7.0 | 5.9 | 6.1 | 10.8 | 11.0 |
| 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) | 14.1 | 13.3 | 12.3 | 11.3 | 10.4 | 10.0 | 10.2 | 10.9 | 11.9 | 12.9 | 13.8 | 14.3 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 |
| Sunshine mean duration (h) | 9.5 | 8.4 | 8.7 | 8.6 | 7.1 | 7.5 | 8.5 | 9.1 | 8.2 | 8.7 | 10.7 | 9.6 |
| Precipitation (mm) | 49 | 77 | 51 | 29 | 131 | 40 | 23 | 8 | 89 | 108 | 21 | 86 |
| Sunny days | 12 | 7 | 15 | 17 | 15 | 21 | 22 | 23 | 16 | 8 | 15 | 5 |
| Rainy days | 19 | 21 | 16 | 13 | 16 | 9 | 9 | 8 | 14 | 23 | 15 | 26 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grahamstown is at