S
M
T
W
T
F
S
26
83°
70°
27
80°
67°
28
79°
65°
29
80°
66°
30
85°
71°
31
86°
70°
1
83°
67°
2
85°
70°
3
87°
63°
4
80°
63°
5
79°
66°
6
80°
63°
7
79°
62°
8
80°
61°
9
80°
61°
10
81°
68°
11
82°
66°
12
81°
65°
13
85°
61°
14
79°
61°
15
81°
62°
16
80°
61°
17
77°
61°
18
78°
62°
19
78°
60°
20
80°
62°
21
81°
67°
22
82°
68°
23
85°
69°
24
86°
68°
25
86°
64°
26
85°
61°
27
81°
65°
28
84°
66°
29
80°
59°
30
81°
57°
31
77°
56°
1
75°
59°
2
75°
58°
3
76°
58°
4
75°
56°
5
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Long Grove
Long Grove's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 56° and 71°. The average high for August is 81° with an average low of 63°. 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 Long Grove. See also: September | October | November.
