September weather forecast and climate
Cape Town, South Africa

An aerial view of Cape Town, South Africa, with the surrounding calm clear waters and several mountains in view
An aerial view of Cape Town, South Africa, with the surrounding calm clear waters and several mountains in view

What is the temperature in September in Cape Town?

In September, the average high-temperature is 19.2°C (66.6°F), and the average low-temperature is 8.7°C (47.7°F).

How many days does it rain in September in Cape Town?

In September, in Cape Town, South Africa, the rain falls for 10.4 days. Throughout September, 40mm (1.6") of precipitation is accumulated.
Average temperature in September - Cape Town, South Africa
  • Average high temperature in September: 19.2°C

The warmest month (with the highest average high temperature) is February (26.5°C).
The month with the lowest average high temperature is July (17.5°C).

  • Average low temperature in September: 8.7°C

The month with the highest average low temperature is January (15.7°C).
The coldest month (with the lowest average low temperature) is July (7°C).

Average humidity in September - Cape Town, South Africa
  • Average humidity in September: 77%

Months with the highest relative humidity are May, June and July (81%).
Months with the lowest relative humidity are January, November and December (71%).

Average rainfall in September - Cape Town, South Africa
  • Average rainfall in September: 40mm

The wettest month (with the highest rainfall) is June (93mm).
The driest month (with the lowest rainfall) is November (14mm).

Average rainfall days in September - Cape Town, South Africa
  • Average rainfall days in September: 10.4 days

The month with the highest number of rainy days is August (13.7 days).
The month with the lowest number of rainy days is February (4.6 days).

Average sea temperature in September - Cape Town, South Africa
  • Average sea temperature in September: 15.3°C

The best month for swimming (with the highest average sea temperature) is January (18.5°C).
Coldest months (with the lowest average sea temperature) are July, August and September (15.3°C).

Average daylight in September / Average sunshine in September - Cape Town, South Africa
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.4h).
The month with shortest days is June (Average daylight: 9.9h).

  • Average sunshine in September: 7.5h

The month with most sunshine is January (Average sunshine: 10.9h).
The month with least sunshine is June (Average sunshine: 5.8h).

Average UV index in September - Cape Town, South Africa
  • Average UV index in September: 6

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 3).

deutscheenglishespañolрусский中文