S
M
T
W
T
F
S
26
78°
64°
27
78°
60°
28
79°
57°
29
79°
64°
30
85°
64°
31
84°
63°
1
78°
60°
2
81°
64°
3
79°
55°
4
76°
61°
5
79°
60°
6
78°
56°
7
80°
55°
8
78°
54°
9
80°
60°
10
80°
62°
11
77°
59°
12
82°
55°
13
76°
54°
14
77°
54°
15
78°
57°
16
77°
55°
17
77°
52°
18
75°
53°
19
77°
56°
20
77°
61°
21
81°
62°
22
79°
63°
23
83°
62°
24
81°
60°
25
84°
59°
26
78°
53°
27
77°
60°
28
80°
58°
29
80°
52°
30
74°
50°
31
73°
50°
1
73°
51°
2
72°
50°
3
73°
51°
4
72°
49°
5
71°
49°
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 71° to 85°, with overnight lows between 49° and 64°. The average high for August is 78° with an average low of 57°. 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.
