S
M
T
W
T
F
S
26
84°
69°
27
78°
64°
28
79°
67°
29
80°
69°
30
80°
65°
31
81°
68°
1
80°
64°
2
80°
62°
3
79°
63°
4
77°
61°
5
78°
62°
6
78°
62°
7
79°
63°
8
80°
63°
9
83°
66°
10
78°
67°
11
80°
69°
12
83°
69°
13
83°
70°
14
82°
65°
15
83°
61°
16
81°
62°
17
77°
67°
18
76°
62°
19
76°
60°
20
75°
60°
21
76°
63°
22
78°
63°
23
81°
66°
24
82°
67°
25
81°
59°
26
82°
59°
27
74°
60°
28
75°
59°
29
75°
65°
30
79°
66°
31
81°
66°
1
81°
58°
2
77°
59°
3
80°
63°
4
75°
64°
5
74°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Wilmette
Wilmette's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 58° and 70°. The average high for August is 79° with an average low of 64°. 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 Wilmette. See also: September | October | November.
