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South Africa weather

Weather in Johannesburg South for September 2025

Your guide to Johannesburg South weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Johannesburg South has been nearly identical to the historical average, with a temperature of 26.6 °C (showing only a slight deviation of 0.5 °C).

  • The forecast for the upcoming days in Johannesburg South predicts a temperature of 27.6 °C, which is slightly above the historical average.

  • In general, the average temperature in Johannesburg South at the beginning of September is 25.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 27.1 °C by the end of September.

    • Rain 🌧️

  • With an average of 3 rainy days, Johannesburg South experiences minimal rainfall in September.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
27
Dry days
Average rainy days
3
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/14°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
32 %
Avg humidity

Johannesburg South Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
25°
2
Sunny
26°
3
Sunny
27°
4
Sunny
26°
5
Sunny
25°
6
Sunny
26°
7
Sunny
25°
8
Sunny
26°
9
Overcast
27°
10
Partly cloudy
24°
11
Sunny
26°
12
Sunny
28°
13
Sunny
28°
14
Sunny
30°
15
Sunny
26°
16
Sunny
26°
17
Sunny
26°
18
Sunny
27°
19
Sunny
29°
20
Sunny
28°
21
Sunny
29°
22
Sunny
30°
23
Sunny
27°
24
Patchy rain possible
27°
25
Sunny
26°
26
Sunny
27°
27
Patchy rain possible
28°
28
Sunny
30°
29
Partly cloudy
30°
30
Sunny
22°

Temperatures trend during September in Johannesburg South

See the weather trend as well as the moving average line

September weather in Johannesburg South day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 25° /13° 0 mm 8
2 Sept. Sunny
Sunny
 26° /14° 0 mm 8
3 Sept. Sunny
Sunny
 27° /15° 0 mm 8
4 Sept. Sunny
Sunny
 26° /15° 0 mm 8
5 Sept. Sunny
Sunny
 25° /15° 0 mm 8
6 Sept. Sunny
Sunny
 26° /15° 1.2 mm 8
7 Sept. Sunny
Sunny
 25° /13° 0.2 mm 8
8 Sept. Sunny
Sunny
 26° /15° 0 mm 8
9 Sept. Overcast
Overcast
 27° /14° 0.6 mm 7
10 Sept. Partly cloudy
Partly cloudy
 24° /13° 0 mm 8
11 Sept. Sunny
Sunny
 26° /13° 0 mm 8
12 Sept. Sunny
Sunny
 28° /16° 0 mm 8
13 Sept. Sunny
Sunny
 28° /16° 0 mm 8
14 Sept. Sunny
Sunny
 30° /19° 0 mm 9
15 Sept. Sunny
Sunny
 26° /16° 0 mm 2.1
16 Sept. Sunny
Sunny
 26° /17° 0 mm 2.2
17 Sept. Sunny
Sunny
 26° /13° 0 mm 2.4
18 Sept. Sunny
Sunny
 27° /16° 0 mm 2.4
19 Sept. Sunny
Sunny
 29° /19° 0 mm 2.8
20 Sept. Sunny
Sunny
 28° /19° 0 mm 7
21 Sept. Sunny
Sunny
 29° /18° 0 mm 7
22 Sept. Sunny
Sunny
 30° /19° 0 mm 7
23 Sept. Sunny
Sunny
 27° /14° 0 mm 7
24 Sept. Patchy rain possible
Patchy rain possible
 27° /17° 2.6 mm 6
25 Sept. Sunny
Sunny
 26° /16° 0 mm 7
26 Sept. Sunny
Sunny
 27° /19° 0 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
 28° /20° 0.2 mm 6
28 Sept. Sunny
Sunny
 30° /20° 0 mm 7
29 Sept. Partly cloudy
Partly cloudy
 30° /18° 0.7 mm 9
30 Sept. Sunny
Sunny
 22° /11° 0 mm 7
Next
Important Notice
Our weather forecast for Johannesburg South 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 South forecast closer to your planned date for the most up-to-date weather information.
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Johannesburg South in September - FAQ

What are the expected maximum and minimum temperatures in Johannesburg South during September?
Enjoy moderate daytime temperatures of up to 25° 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 South during September?
Rainfall in Johannesburg South during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 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 South during September?
The average wind speed in Johannesburg South during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Johannesburg South

Explore the daily rainfall trends and prepare for Johannesburg Souths September weather 💧

UV exposure in Johannesburg South during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Johannesburg South?

Get accurate weather forecasts for Johannesburg South, located at latitude -26.273 and longitude 27.995. Stay updated with localized weather information tailored for Johannesburg South.

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