S
M
T
W
T
F
S
26
84°
65°
27
84°
65°
28
83°
64°
29
84°
65°
30
83°
64°
31
81°
63°
1
77°
61°
2
76°
61°
3
77°
63°
4
78°
64°
5
80°
64°
6
82°
63°
7
83°
64°
8
81°
64°
9
83°
63°
10
82°
64°
11
83°
64°
12
84°
63°
13
83°
65°
14
86°
56°
15
83°
57°
16
80°
60°
17
79°
59°
18
83°
58°
19
84°
56°
20
77°
53°
21
76°
54°
22
76°
55°
23
77°
55°
24
77°
56°
25
78°
60°
26
76°
59°
27
83°
55°
28
83°
54°
29
75°
54°
30
74°
53°
31
74°
53°
1
75°
54°
2
73°
52°
3
74°
53°
4
74°
53°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Pewaukee
Pewaukee's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 52° and 65°. The average high for August is 80° with an average low of 59°. 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 Pewaukee. See also: September | October | November.