S
M
T
W
T
F
S
26
97°
75°
27
98°
75°
28
90°
74°
29
94°
75°
30
90°
72°
31
95°
71°
1
73°
66°
2
86°
61°
3
88°
64°
4
91°
66°
5
95°
72°
6
97°
70°
7
88°
70°
8
91°
66°
9
97°
72°
10
97°
75°
11
97°
73°
12
97°
77°
13
100°
79°
14
99°
79°
15
99°
73°
16
100°
77°
17
86°
68°
18
99°
68°
19
99°
75°
20
95°
70°
21
98°
72°
22
92°
67°
23
88°
70°
24
89°
74°
25
92°
70°
26
89°
67°
27
85°
63°
28
94°
71°
29
93°
70°
30
95°
71°
31
94°
72°
1
95°
72°
2
85°
62°
3
79°
60°
4
89°
67°
5
84°
66°
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 79° to 98°, with overnight lows between 60° and 74°. The average high for August is 90° with an average low of 68°. 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.
