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
N/A
5
83°
66°
6
78°
68°
7
86°
69°
8
86°
71°
9
86°
69°
10
84°
66°
11
85°
64°
12
79°
67°
13
82°
67°
14
83°
65°
15
80°
64°
16
83°
66°
17
82°
65°
18
82°
62°
19
87°
67°
20
82°
66°
21
85°
66°
22
85°
67°
23
84°
67°
24
83°
66°
25
82°
67°
26
84°
66°
27
81°
63°
28
78°
65°
29
81°
64°
30
82°
65°
31
83°
65°
1
82°
64°
2
79°
64°
3
81°
63°
4
80°
64°
5
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Northbrook
Northbrook's August 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 62° and 71°. The average high for August is 83° with an average low of 66°. 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 Northbrook. See also: September | October | November.
