Avg high
18°C
Avg low
11°C
Rainfall
53 mm
Rain days
7.7
Sunshine
9.9 h/day
Daylight
11.8 h
What to pack for Cape Town in September
- long sleeves and a warm layer
- a medium jacket
- a packable rain layer
Humidity averages 76%; max daily wind around 22 km/h.
How September compares
Best months in Cape Town: September–May. See the full best time to visit Cape Town guide.
Cape Town in September: the details
In September, Cape Town sees average daytime highs of 18°C (64°F) and overnight lows of 11°C (52°F). Rainfall totals roughly 53 mm across 7.7 rainy days, and the sun shines about 9.9 hours per day with 11.8 hours of daylight mid-month. Relative humidity averages 76%.
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Cape Town, South Africa (-33.93, 18.42) — see our methodology. Actual conditions vary year to year.
Where should you go next month?
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