S
M
T
W
T
F
S
26
94°
67°
27
93°
65°
28
95°
67°
29
95°
68°
30
Hist. Avg.
92°
65°
31
Hist. Avg.
92°
65°
1
Hist. Avg.
92°
65°
2
Hist. Avg.
92°
65°
3
Hist. Avg.
92°
65°
4
Hist. Avg.
93°
65°
5
Hist. Avg.
93°
65°
6
Hist. Avg.
93°
65°
7
Hist. Avg.
93°
65°
8
Hist. Avg.
93°
65°
9
Hist. Avg.
93°
65°
10
Hist. Avg.
93°
65°
11
Hist. Avg.
93°
65°
12
Hist. Avg.
93°
65°
13
Hist. Avg.
93°
65°
14
Hist. Avg.
93°
65°
15
Hist. Avg.
93°
65°
16
Hist. Avg.
93°
65°
17
Hist. Avg.
93°
65°
18
Hist. Avg.
93°
65°
19
Hist. Avg.
93°
65°
20
Hist. Avg.
93°
65°
21
Hist. Avg.
93°
65°
22
Hist. Avg.
94°
65°
23
Hist. Avg.
94°
65°
24
Hist. Avg.
94°
65°
25
Hist. Avg.
94°
65°
26
Hist. Avg.
94°
65°
27
Hist. Avg.
94°
65°
28
Hist. Avg.
94°
65°
29
Hist. Avg.
93°
65°
30
Hist. Avg.
93°
65°
31
Hist. Avg.
93°
65°
1
Hist. Avg.
93°
64°
2
Hist. Avg.
93°
64°
3
Hist. Avg.
93°
64°
4
Hist. Avg.
93°
64°
5
Hist. Avg.
93°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Winnetka
Winnetka's August 2026 forecast shows daily high temperatures ranging from 93° to 95°, with overnight lows between 65° and 68°. The average high for August is 94° 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 Winnetka. See also: September | October | November.
