S
M
T
W
T
F
S
26
92°
72°
27
86°
70°
28
80°
65°
29
80°
62°
30
87°
63°
31
81°
70°
1
73°
66°
2
77°
63°
3
80°
62°
4
84°
66°
5
83°
69°
6
81°
67°
7
83°
71°
8
84°
67°
9
86°
69°
10
84°
68°
11
81°
66°
12
82°
65°
13
81°
66°
14
83°
65°
15
77°
62°
16
78°
68°
17
87°
70°
18
87°
71°
19
88°
69°
20
82°
69°
21
85°
68°
22
86°
70°
23
86°
69°
24
83°
69°
25
82°
68°
26
84°
68°
27
81°
65°
28
78°
67°
29
82°
66°
30
83°
67°
31
83°
67°
1
84°
66°
2
79°
66°
3
81°
65°
4
81°
66°
5
83°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Des Plaines
Des Plaines's August 2026 forecast shows daily high temperatures ranging from 73° to 88°, with overnight lows between 62° and 71°. The average high for August is 82° 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 Des Plaines. See also: September | October | November.
