Historical climate averages in Cape Town for September
South Africa · 2021–2025 · 150 daily observations
A month-level reference built from observed daily highs, lows, and precipitation values. Use it to see how September fits into Cape Town's annual pattern, then jump to nearby months below.
Average High
18.2°C
Average Low
10.3°C
Record High
33.0°C
Record Low
3.5°C
Average Daily Precipitation
1.6mm
Data Coverage
2021–2025 (150 obs)
September in context
September in Cape Town is the 7th warmest month by average daytime high. Average highs reach 18.2°C and average lows settle near 10.3°C.
the 4th wettest month by average daily precipitation. Average daily precipitation is 1.6mm, versus 4.6mm in June, the wettest month.
This snapshot is built from 150 daily observations collected between 2021 and 2025. Record highs and lows mark the single hottest and coldest daily readings in the archive for this month.
Relative to the full year
- Daytime highs: -4.5°C vs city-wide monthly average
- Nighttime lows: -3.5°C vs city-wide monthly average
- Daily precipitation: +0.0mm vs city-wide monthly average
Archive quality
- Coverage: 2021–2025 (150 obs)
- Temperature span: 29.5°C between record low and high
- Driest month benchmark: January at 0.4mm
How this summary is calculated
PastWeather groups all recorded days for September, then calculates the average daytime high, average nighttime low, and average daily precipitation value for that month. The cards above stay tied to observed data rather than travel copy or generic climate descriptions.
Average high / low
Mean daily maximum and minimum temperatures across every recorded September day in the archive.
Record extremes
The single hottest and coldest daily readings observed during this month, useful for understanding outlier risk.
Precipitation note
Precipitation is shown as an average daily value for this month, which helps compare wetter and drier parts of the year on the same basis.
Explore another month
Move month by month or jump straight to the warmest, coldest, or wettest part of the year for Cape Town.