The climate in Johannesburg during September can be summarized as mild and dry.
September is in the spring in Johannesburg and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a comfortable 23°C (74°F), whilst at night 9°C (49°F) is normal.
|Daytime temperature||23.2°C 73.8°F|
|Nightly temperature||9.2°C 48.6°F|
|Average temperature||16.2°C 61.2°F|
|Daily sunshine||10.3 hrs|
|Avg rainfall||28 mm 1.1 ins|
|Rainy days||3 days|
|Sea temperature||20.6°C 69°F|
|Windspeed||12.2kph 8 mph|
On average September is the 5th driest month of the year in Johannesburg with around 28mm 1.1 inches of rain making it a dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.3 hours of sunshine per day.
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 Johannesburg in September 2023.
|Hottest month:||January||26.1°C 79°F|
|Driest month:||July||4mm 0.2ins|
|Coldest month:||June||16.4°C 61.5°F|
|Wettest month:||January||135mm 5.3ins|