Stellenbosch Weather in September
What's the weather like in Stellenbosch (Western Cape) in September 2025?
The climate in Stellenbosch during September can be summarized as mild and a little damp.
September is in the spring in Stellenbosch and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 7°C (45°F) is normal.
| Daytime temperature | 18.4°C 65.1°F |
|---|---|
| Nightly temperature | 7.2°C 45°F |
| Average temperature | 12.8°C 55°F |
| Daily sunshine | 8 hrs |
| Avg rainfall | 89 mm 3.5 ins |
| Rainy days | 11 days |
| Sea temperature | 15.3°C 59.6°F |
| Humidity | 71% |
| Windspeed | 16.6kph 10 mph |
On average September is the 5th wettest month of the year in Stellenbosch with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
September temperatures in Stellenbosch
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Stellenbosch in September 2025.
Other monthly averages
Best places to visit in September
Stellenbosch weather stats
| Hottest month: | February | 27°C 80.6°F |
|---|---|---|
| Driest month: | February | 30mm 1.2ins |
| Sunniest month: | January | 11.9hrs |
| Coldest month: | July | 16.1°C 61°F |
| Wettest month: | June | 165mm 6.5ins |
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