Climate averages 1991–2020
Cape Town weather
in August.
A mild, moderately 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 Cape Town: daytime highs average 16.5°C and nights cool to about 9.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 87 mm of rain on roughly 10 days, which makes August a moderately 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 Atlantis (40 km away). In August its highs average 16.2°C, about as warm as Cape Town, with 59 mm of rain.
Among the 95 cities listed in South Africa, Cape Town ranks 94th of 95 for the warmest August highs and 92nd of 95 for the driest August (rainfall, lowest first). The mean August high of those 95 cities is 21.0°C; Cape Town is 4.5°C cooler than that mean.
From August to September, average highs rise by 1.4°C to 17.9°C, and monthly rainfall falls from 87 mm to 51 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
Cape Town climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.6°C17.5°C | 17.5°C | 15 | 2.8 | 14.114 h |
| February | 25.9°C17.7°C | 17.7°C | 14 | 3.0 | 13.313 h |
| March | 24.6°C16.5°C | 16.5°C | 16 | 3.3 | 12.312 h |
| April | 22.0°C14.2°C | 14.2°C | 43 | 5.2 | 11.311 h |
| May | 19.3°C12.1°C | 12.1°C | 67 | 8.4 | 10.410 h |
| June | 16.9°C10.0°C | 10.0°C | 108 | 11.1 | 9.910 h |
| July | 16.4°C9.3°C | 9.3°C | 98 | 9.9 | 10.110 h |
| August, selected | 16.5°C9.5°C | 9.5°C | 87 | 10.3 | 10.911 h |
| September | 17.9°C10.8°C | 10.8°C | 51 | 8.2 | 11.912 h |
| October | 20.4°C12.8°C | 12.8°C | 33 | 5.8 | 12.913 h |
| November | 22.1°C14.4°C | 14.4°C | 30 | 5.1 | 13.914 h |
| December | 24.3°C16.4°C | 16.4°C | 17 | 3.6 | 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
- Atlantis in AugustSouth Africa · 40 kmHigh 16.2°C · Low 7.5°C · 59 mm rain
- Somerset West in AugustSouth Africa · 41 kmHigh 17.4°C · Low 10.2°C · 105 mm rain
- Stellenbosch in AugustSouth Africa · 41 kmHigh 17.2°C · Low 8.0°C · 105 mm rain
- Paarl in AugustSouth Africa · 55 kmHigh 17.8°C · Low 7.7°C · 110 mm rain
- Worcester, South Africa in AugustSouth Africa · 100 kmHigh 17.5°C · Low 8.6°C · 51 mm rain
- Mossel Bay in AugustSouth Africa · 344 kmHigh 18.5°C · Low 9.9°C · 47 mm rain
- Oudtshoorn in AugustSouth Africa · 351 kmHigh 19.8°C · Low 6.1°C · 33 mm rain
- George in AugustSouth Africa · 373 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 Cape Town) is explained once on the Cape Town year overview and on the Sources, method and limits page.