S
M
T
W
T
F
S
26
91°
72°
27
87°
70°
28
79°
63°
29
80°
61°
30
87°
60°
31
81°
65°
1
70°
66°
2
77°
64°
3
80°
61°
4
85°
63°
5
82°
69°
6
78°
66°
7
87°
67°
8
83°
66°
9
82°
62°
10
85°
71°
11
81°
71°
12
84°
70°
13
77°
67°
14
78°
68°
15
78°
72°
16
87°
70°
17
79°
63°
18
82°
65°
19
79°
59°
20
81°
62°
21
82°
63°
22
81°
60°
23
75°
59°
24
74°
63°
25
78°
64°
26
81°
63°
27
78°
63°
28
78°
63°
29
80°
61°
30
81°
62°
31
75°
63°
1
74°
66°
2
74°
62°
3
73°
59°
4
74°
59°
5
76°
62°
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 73° to 82°, with overnight lows between 59° and 66°. The average high for August is 78° with an average low of 62°. 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.
