S
M
T
W
T
F
S
26
89°
70°
27
84°
71°
28
81°
62°
29
80°
58°
30
84°
57°
31
78°
65°
1
72°
66°
2
76°
62°
3
81°
61°
4
86°
65°
5
81°
65°
6
81°
64°
7
84°
63°
8
86°
66°
9
86°
67°
10
85°
64°
11
88°
65°
12
82°
62°
13
85°
64°
14
84°
62°
15
83°
61°
16
78°
64°
17
87°
66°
18
87°
65°
19
88°
65°
20
82°
64°
21
85°
64°
22
86°
65°
23
86°
65°
24
83°
64°
25
81°
64°
26
84°
63°
27
81°
61°
28
78°
63°
29
82°
61°
30
83°
62°
31
83°
62°
1
84°
61°
2
79°
62°
3
81°
61°
4
81°
61°
5
83°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Wheaton
Wheaton's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 60° and 67°. The average high for August is 83° with an average low of 63°. 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 Wheaton. See also: September | October | November.
