Weather in Cape Town in September
September in Cape Town is mild with average temperatures around 15.1°C (59.2°F). Light rainfall with only 40mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
16.5°C
61.7°F
Low
13.6°C
56.5°F
Precipitation
40 mm
1.6 inches
~9 rainy days
Conditions
Humidity
79%
Comparison to Adjacent Months
September is 37mm drier than August.