S
M
T
W
T
F
S
30
74°
53°
31
74°
53°
1
75°
54°
2
73°
52°
3
74°
53°
4
74°
53°
5
75°
55°
6
74°
56°
7
72°
54°
8
73°
53°
9
72°
50°
10
72°
49°
11
73°
49°
12
73°
51°
13
72°
51°
14
70°
52°
15
76°
56°
16
77°
57°
17
76°
56°
18
76°
47°
19
74°
46°
20
68°
46°
21
66°
52°
22
68°
53°
23
73°
52°
24
71°
53°
25
72°
43°
26
71°
42°
27
63°
42°
28
62°
43°
29
63°
43°
30
63°
41°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pewaukee
Pewaukee's September 2026 forecast shows daily high temperatures ranging from 62° to 77°, with overnight lows between 41° and 57°. The average high for September is 72° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Pewaukee. See also: October | November | December.
