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The weather in September in Cape Town

It's pleasantly warm in September in Cape Town with an average temperature of 20°C. Temperatures this month range from a low of 19°C to a high of 23°C. At night, you can expect temperatures between 10°C and 12°C.

Looking for great weather? September is a good time to be in Cape Town. The temperatures are nice, and there’s not too much rain.

Average temperatures and precipitation

This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Cape Town, South Africa. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.

Temperature records

With 36°C in 2019, Cape Town reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 14°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 16°C.

Water temperature

The water temperature at Cape Town is 17°C this month. You can swim, but it's a bit chilly.

Rainfall amount

In September, there is an average of 65 mm of precipitation, spread over 9 days. The wind speed is around 5 Bft, mostly coming from the Southwest.

Daily weather in September for Cape Town

Click on any day in September to get detailed info about the usual weather on that day in Cape Town. Check out the historical temperatures and precipitation over the past 10 years on this day.

September weather comparison

  Cape Town New York
Average temperature 20°C 27°C
Max. temperature 23°C 31°C
Min. temperature 10°C -5°C
Total precipitation 65 mm 57 mm
Rainy days 9 days 9 days

Start of September

The month of September starts in Cape Town with mild temps, averaging around 21°C during the day and nights around 11°C.

Mid September

By mid-September, daytime temps drop to around 20°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.

End of September

By the end of September, the average daytime temperature in Cape Town is around 21°C, while nighttime temps are about 12°C. A shower might pop up, but overall, the weather will be dry and sunny.

Find affordable trips to Cape Town

UV index

The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

Check out the climate of Cape Town for all months and discover the best travel time

Curious about the weather in other parts of South Africa? Check out the climate and weather for spots like Krugerpark, Johannesburg, Stellenbosch, or explore other destinations in South Africa.

Temperature charts

These charts show the average temperatures in September in Cape Town, South Africa. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.

Daily Temperature in September in Cape Town

Temperature in September in Cape Town over the years

Precipitation charts

These charts show the average amount of precipitation in September in Cape Town, South Africa. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.

Daily Precipitation in September in Cape Town

Total precipitation in September in Cape Town over the years

Daily UV index in September in Cape Town

This chart shows the average daily UV index in September in Cape Town, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Weather experiences in September in Cape Town

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Average weather in Cape Town by month

Click on a month below to see detailed weather info for Cape Town. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.