S
M
T
W
T
F
S
26
86°
66°
27
86°
66°
28
87°
65°
29
85°
65°
30
83°
62°
31
78°
59°
1
79°
64°
2
77°
64°
3
78°
63°
4
84°
65°
5
84°
66°
6
83°
64°
7
78°
61°
8
77°
63°
9
77°
64°
10
79°
64°
11
81°
64°
12
83°
64°
13
86°
65°
14
85°
64°
15
84°
65°
16
86°
58°
17
84°
56°
18
77°
54°
19
75°
54°
20
76°
55°
21
77°
54°
22
77°
54°
23
78°
55°
24
77°
57°
25
80°
62°
26
83°
55°
27
78°
55°
28
75°
54°
29
77°
59°
30
80°
62°
31
81°
53°
1
78°
51°
2
75°
52°
3
74°
56°
4
77°
61°
5
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oconomowoc
Oconomowoc's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 51° and 66°. The average high for August is 80° 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 Oconomowoc. See also: September | October | November.
