S
M
T
W
T
F
S
26
88°
67°
27
88°
67°
28
87°
66°
29
87°
66°
30
85°
63°
31
80°
60°
1
82°
64°
2
78°
64°
3
79°
62°
4
85°
66°
5
86°
66°
6
86°
65°
7
80°
62°
8
78°
63°
9
79°
62°
10
82°
63°
11
83°
64°
12
85°
65°
13
86°
66°
14
87°
65°
15
86°
66°
16
88°
60°
17
86°
57°
18
79°
55°
19
77°
55°
20
77°
54°
21
78°
55°
22
79°
55°
23
78°
56°
24
79°
57°
25
81°
60°
26
83°
56°
27
82°
55°
28
77°
54°
29
78°
58°
30
81°
61°
31
82°
54°
1
82°
53°
2
77°
52°
3
76°
57°
4
78°
61°
5
83°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Downers Grove
Downers Grove's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 52° and 67°. The average high for August is 82° with an average low of 60°. 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 Downers Grove. See also: September | October | November.
