S
M
T
W
T
F
S
26
92°
72°
27
93°
68°
28
86°
61°
29
84°
61°
30
85°
60°
31
83°
61°
1
83°
59°
2
81°
60°
3
80°
61°
4
82°
60°
5
81°
58°
6
78°
61°
7
83°
64°
8
83°
64°
9
81°
63°
10
77°
63°
11
77°
62°
12
81°
64°
13
79°
63°
14
80°
63°
15
81°
61°
16
76°
58°
17
75°
58°
18
76°
59°
19
77°
59°
20
80°
62°
21
83°
63°
22
82°
62°
23
82°
63°
24
83°
63°
25
84°
62°
26
84°
63°
27
83°
62°
28
79°
61°
29
78°
60°
30
81°
60°
31
82°
61°
1
82°
60°
2
79°
54°
3
72°
52°
4
73°
53°
5
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sun Prairie
Sun Prairie's August 2026 forecast shows daily high temperatures ranging from 72° to 93°, with overnight lows between 52° and 72°. The average high for August is 81° with an average low of 61°. 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 Sun Prairie. See also: September | October | November.
