S
M
T
W
T
F
S
26
83°
68°
27
78°
67°
28
77°
65°
29
76°
63°
30
76°
67°
31
77°
67°
1
79°
66°
2
82°
68°
3
82°
68°
4
83°
67°
5
77°
64°
6
76°
64°
7
81°
67°
8
81°
65°
9
79°
67°
10
80°
65°
11
76°
62°
12
78°
66°
13
82°
66°
14
78°
62°
15
74°
59°
16
74°
59°
17
75°
65°
18
76°
66°
19
76°
66°
20
77°
65°
21
79°
65°
22
75°
64°
23
75°
65°
24
79°
58°
25
79°
64°
26
82°
61°
27
81°
59°
28
76°
58°
29
72°
56°
30
73°
56°
31
74°
63°
1
78°
64°
2
73°
65°
3
80°
64°
4
80°
55°
5
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South Madison
South Madison's August 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 55° and 68°. The average high for August is 78° with an average low of 64°. 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 South Madison. See also: September | October | November.