Climate averages 1991–2020
Stellenbosch weather
in August.
A mild, wet month: the 11th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Stellenbosch: daytime highs average 17.2°C and nights cool to about 8.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 105 mm of rain on roughly 11 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 52 min on an average August day.
The nearest other city in this atlas is Somerset West (17 km away). In August its highs average 17.4°C, about as warm as Stellenbosch, with 105 mm of rain.
Among the 95 cities listed in South Africa, Stellenbosch ranks joint 92nd of 95 for the warmest August highs and joint 93rd of 95 for the driest August (rainfall, lowest first). The mean August high of those 95 cities is 21.0°C; Stellenbosch is 3.8°C cooler than that mean.
From August to September, average highs rise by 1.9°C to 19.0°C, and monthly rainfall falls from 105 mm to 68 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Stellenbosch climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.7°C17.0°C | 17.0°C | 21 | 3.4 | 14.114 h |
| February | 29.2°C17.4°C | 17.4°C | 18 | 3.2 | 13.313 h |
| March | 27.6°C16.4°C | 16.4°C | 21 | 3.5 | 12.312 h |
| April | 24.2°C13.8°C | 13.8°C | 56 | 5.7 | 11.311 h |
| May | 20.6°C11.4°C | 11.4°C | 90 | 9.0 | 10.410 h |
| June | 17.3°C8.6°C | 8.6°C | 138 | 11.0 | 9.910 h |
| July | 17.0°C7.7°C | 7.7°C | 122 | 10.3 | 10.110 h |
| August, selected | 17.2°C8.0°C | 8.0°C | 105 | 10.9 | 10.911 h |
| September | 19.0°C9.4°C | 9.4°C | 68 | 8.8 | 11.912 h |
| October | 22.0°C11.7°C | 11.7°C | 45 | 6.6 | 12.913 h |
| November | 24.1°C13.3°C | 13.3°C | 41 | 5.8 | 13.914 h |
| December | 26.9°C15.7°C | 15.7°C | 24 | 4.2 | 14.414 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Somerset West in AugustSouth Africa · 17 kmHigh 17.4°C · Low 10.2°C · 105 mm rain
- Paarl in AugustSouth Africa · 24 kmHigh 17.8°C · Low 7.7°C · 110 mm rain
- Cape Town in AugustSouth Africa · 41 kmHigh 16.5°C · Low 9.5°C · 87 mm rain
- Atlantis in AugustSouth Africa · 54 kmHigh 16.2°C · Low 7.5°C · 59 mm rain
- Worcester, South Africa in AugustSouth Africa · 63 kmHigh 17.5°C · Low 8.6°C · 51 mm rain
- Mossel Bay in AugustSouth Africa · 303 kmHigh 18.5°C · Low 9.9°C · 47 mm rain
- Oudtshoorn in AugustSouth Africa · 310 kmHigh 19.8°C · Low 6.1°C · 33 mm rain
- George in AugustSouth Africa · 332 kmHigh 17.2°C · Low 9.2°C · 53 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Stellenbosch) is explained once on the Stellenbosch year overview and on the Sources, method and limits page.
Somerset West lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.