S
M
T
W
T
F
S
26
93°
66°
27
88°
70°
28
90°
66°
29
90°
66°
30
84°
66°
31
77°
63°
1
83°
60°
2
84°
65°
3
85°
53°
4
75°
50°
5
80°
59°
6
82°
64°
7
85°
64°
8
83°
63°
9
81°
62°
10
80°
62°
11
81°
61°
12
80°
64°
13
82°
63°
14
81°
60°
15
79°
66°
16
83°
65°
17
79°
66°
18
84°
65°
19
82°
64°
20
84°
65°
21
84°
66°
22
85°
66°
23
85°
65°
24
83°
64°
25
82°
62°
26
74°
60°
27
74°
62°
28
79°
62°
29
83°
63°
30
84°
65°
31
84°
64°
1
83°
63°
2
84°
64°
3
85°
64°
4
85°
63°
5
84°
63°
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 74° to 85°, with overnight lows between 50° and 66°. The average high for August is 82° 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.
