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Weather in Johannesburg for September 2025

Your guide to Johannesburg weather in September - trends and predictions
  • In general, the average temperature in Johannesburg at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 26.4 °C by the end of September.

  • With an average of 4 rainy days, Johannesburg experiences minimal rainfall in September, ensuring that most days remain pleasantly dry.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
26°/14°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
26 %
Avg humidity

Johannesburg in September average weather

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Temperatures trend during September in Johannesburg

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
24° /11° 0 mm 7
2 Sept. Sunny
Sunny
25° /14° 0 mm 7
3 Sept. Sunny
Sunny
26° /14° 0 mm 8
4 Sept. Sunny
Sunny
26° /14° 0 mm 7
5 Sept. Sunny
Sunny
26° /15° 0 mm 7
6 Sept. Sunny
Sunny
26° /14° 0 mm 8
7 Sept. Sunny
Sunny
25° /13° 0 mm 7
8 Sept. Sunny
Sunny
27° /15° 0 mm 8
9 Sept. Sunny
Sunny
28° /14° 0 mm 7
10 Sept. Sunny
Sunny
25° /13° 0 mm 7
11 Sept. Sunny
Sunny
26° /10° 0 mm 7
12 Sept. Partly cloudy
Partly cloudy
24° /11° 0 mm 7
13 Sept. Sunny
Sunny
24° /12° 0 mm 7
14 Sept. Sunny
Sunny
27° /14° 0 mm 8
15 Sept. Sunny
Sunny
29° /16° 0 mm 8
16 Sept. Sunny
Sunny
28° /16° 0.1 mm 7
17 Sept. Sunny
Sunny
27° /14° 0.2 mm 7
18 Sept. Sunny
Sunny
26° /14° 0 mm 7
19 Sept. Thundery outbreaks possible
Thundery outbreaks possible
27° /15° 0.3 mm 7
20 Sept. Sunny
Sunny
22° /11° 1 mm 6
21 Sept. Sunny
Sunny
19° /12° 0.7 mm 5
22 Sept. Sunny
Sunny
24° /11° 0 mm 6
23 Sept. Overcast
Overcast
25° /13° 0 mm 7
24 Sept. Sunny
Sunny
27° /14° 0 mm 7
25 Sept. Patchy rain possible
Patchy rain possible
28° /15° 0.2 mm 7
26 Sept. Sunny
Sunny
25° /13° 0 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
25° /13° 0.3 mm 7
28 Sept. Cloudy
Cloudy
26° /14° 0.9 mm 7
29 Sept. Sunny
Sunny
28° /16° 0.3 mm 8
30 Sept. Sunny
Sunny
26° /14° 0 mm 8
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Important Notice
Our weather forecast for Johannesburg in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Johannesburg forecast closer to your planned date for the most up-to-date weather information.

Johannesburg in September - FAQ

What are the expected maximum and minimum temperatures in Johannesburg during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Johannesburg during September?
Rainfall in Johannesburg during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 4 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Johannesburg during September?
The average wind speed in Johannesburg during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

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Location coordinates Where is Johannesburg?

Get accurate weather forecasts for Johannesburg, located at latitude -26.202 and longitude 28.044. Stay updated with localized weather information tailored for Johannesburg.

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