S
M
T
W
T
F
S
26
93°
72°
27
85°
69°
28
79°
64°
29
80°
60°
30
90°
58°
31
84°
65°
1
72°
67°
2
76°
64°
3
82°
61°
4
85°
70°
5
80°
68°
6
78°
67°
7
83°
71°
8
87°
71°
9
86°
72°
10
84°
70°
11
83°
67°
12
77°
68°
13
81°
69°
14
81°
66°
15
79°
65°
16
78°
64°
17
80°
65°
18
84°
69°
19
85°
69°
20
80°
68°
21
82°
68°
22
83°
69°
23
83°
69°
24
80°
68°
25
80°
68°
26
81°
67°
27
79°
65°
28
76°
67°
29
79°
67°
30
80°
66°
31
81°
66°
1
80°
65°
2
77°
66°
3
78°
65°
4
78°
65°
5
80°
64°
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 76° to 87°, with overnight lows between 64° and 72°. The average high for August is 81° with an average low of 67°. 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.
