S
M
T
W
T
F
S
26
60°
39°
27
67°
39°
28
69°
39°
29
69°
40°
30
70°
43°
31
69°
45°
1
70°
42°
2
66°
39°
3
64°
39°
4
64°
40°
5
65°
39°
6
70°
46°
7
72°
48°
8
72°
47°
9
73°
48°
10
71°
45°
11
65°
44°
12
65°
47°
13
66°
46°
14
66°
46°
15
67°
49°
16
72°
49°
17
73°
50°
18
73°
50°
19
72°
49°
20
74°
46°
21
73°
48°
22
74°
48°
23
74°
46°
24
71°
47°
25
71°
48°
26
74°
49°
27
74°
49°
28
75°
51°
29
74°
51°
30
76°
52°
31
76°
52°
1
75°
53°
2
77°
53°
3
78°
52°
4
78°
52°
5
77°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Johannesburg
Johannesburg's August 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 39° and 53°. The average high for August is 71° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Johannesburg. See also: September | October | November.
