S
M
T
W
T
F
S
30
70°
48°
31
71°
52°
1
74°
51°
2
77°
52°
3
78°
52°
4
78°
53°
5
77°
49°
6
75°
46°
7
71°
43°
8
72°
46°
9
76°
49°
10
79°
54°
11
81°
53°
12
80°
48°
13
80°
47°
14
78°
49°
15
79°
54°
16
78°
51°
17
Hist. Avg.
74°
45°
18
Hist. Avg.
74°
45°
19
Hist. Avg.
75°
45°
20
Hist. Avg.
75°
45°
21
Hist. Avg.
75°
45°
22
Hist. Avg.
75°
46°
23
Hist. Avg.
75°
46°
24
Hist. Avg.
75°
46°
25
Hist. Avg.
75°
46°
26
Hist. Avg.
75°
46°
27
Hist. Avg.
75°
46°
28
Hist. Avg.
75°
47°
29
Hist. Avg.
75°
47°
30
Hist. Avg.
75°
47°
1
Hist. Avg.
76°
47°
2
Hist. Avg.
76°
47°
3
Hist. Avg.
76°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Johannesburg
Johannesburg's September 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 43° and 54°. The average high for September is 76° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Johannesburg. See also: October | November | December.
