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South Africa weather

Weather in Johannesburg South for September 2026

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

    Temperatures

  • Until now, September 2026 in Johannesburg South is cooler than usual, with temperatures averaging 21.5 °C, this is 3.1 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Johannesburg South with the forecast suggesting a temperature of 21.4 °C, lower than the historical average.

  • In general, the average temperature in Johannesburg South at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 24.3 °C by the end of September.

    • Rain 🌧️

  • With an average of 4 rainy days, Johannesburg South experiences minimal rainfall in September.

    • More

  • 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°/15°
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
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
25°
2
Sunny
26°
3
Sunny
26°
4
Sunny
25°
5
Sunny
24°
6
Sunny
24°
7
Sunny
22°
8
Sunny
24°
9
Overcast
25°
10
Partly cloudy
24°
11
Sunny
26°
12
Sunny
28°
13
Sunny
25°
14
Sunny
25°
15
Sunny
22°
16
Sunny
26°
17
Sunny
28°
18
Patchy rain possible
17°
19
Light rain shower
13°
20
Light rain shower
14°
21
Overcast
20°
22
Overcast
20°
23
Patchy rain possible
23°
24
Overcast
24°
25
Overcast
23°
26
Sunny
20°
27
Sunny
27°
28
Partly cloudy
29°
29
Partly cloudy
27°
30
Sunny
20°

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 7
2 Sept. Sunny
Sunny
 26° /15° 0 mm 7
3 Sept. Sunny
Sunny
 26° /15° 0 mm 7
4 Sept. Sunny
Sunny
 25° /14° 1.2 mm 6
5 Sept. Sunny
Sunny
 24° /13° 0.1 mm 7
6 Sept. Sunny
Sunny
 24° /14° 3.8 mm 5
7 Sept. Sunny
Sunny
 22° /13° 1.7 mm 5
8 Sept. Sunny
Sunny
 24° /14° 0.1 mm 7
9 Sept. Overcast
Overcast
 25° /13° 0.4 mm 7
10 Sept. Partly cloudy
Partly cloudy
 24° /12° 0 mm 7
11 Sept. Sunny
Sunny
 26° /13° 0 mm 7
12 Sept. Sunny
Sunny
 28° /16° 0 mm 8
13 Sept. Sunny
Sunny
 25° /16° 0 mm 9.4
14 Sept. Sunny
Sunny
 25° /13° 3.3 mm 9
15 Sept. Sunny
Sunny
 22° /13° 4.2 mm 8.5
16 Sept. Sunny
Sunny
 26° /15° 0 mm 9.8
17 Sept. Sunny
Sunny
 28° /17° 0.4 mm 9.3
18 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 9.4 mm 5
19 Sept. Light rain shower
Light rain shower
 13° /8° 50.8 mm 4
20 Sept. Light rain shower
Light rain shower
 14° /9° 10.7 mm 4
21 Sept. Overcast
Overcast
 20° /10° 0 mm 6
22 Sept. Overcast
Overcast
 20° /15° 0.6 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 1.2 mm 7
24 Sept. Overcast
Overcast
 24° /17° 0.1 mm 7
25 Sept. Overcast
Overcast
 23° /15° 0.1 mm 7
26 Sept. Sunny
Sunny
 20° /12° 0.6 mm 7
27 Sept. Sunny
Sunny
 27° /16° 0 mm 8
28 Sept. Partly cloudy
Partly cloudy
 29° /17° 2.1 mm 8
29 Sept. Partly cloudy
Partly cloudy
 27° /15° 4.2 mm 8
30 Sept. Sunny
Sunny
 20° /11° 0.1 mm 6
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?
During September, expect a variety of temperatures with highs around 26° and lows near 15°, suitable for diverse activities and preferences.

How much rainfall should be expected in Johannesburg South during September?
Expect minimal rainfall in Johannesburg South during September, with a total of 14.8 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.

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 💧
Typically, Johannesburg South has 4 rainy days in September with a total of 14.8 mm of rainfall.

UV exposure in Johannesburg South during September

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

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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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