S
M
T
W
T
F
S
30
79°
61°
31
82°
61°
1
81°
54°
2
78°
53°
3
80°
57°
4
76°
59°
5
76°
58°
6
75°
56°
7
76°
52°
8
77°
49°
9
73°
50°
10
72°
58°
11
77°
55°
12
78°
57°
13
78°
57°
14
77°
56°
15
76°
57°
16
70°
48°
17
68°
48°
18
Hist. Avg.
72°
49°
19
Hist. Avg.
72°
48°
20
Hist. Avg.
71°
48°
21
Hist. Avg.
71°
47°
22
Hist. Avg.
70°
47°
23
Hist. Avg.
70°
46°
24
Hist. Avg.
69°
46°
25
Hist. Avg.
69°
46°
26
Hist. Avg.
68°
45°
27
Hist. Avg.
68°
45°
28
Hist. Avg.
67°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
66°
43°
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
*Temporarily Unavailable
September Weather in Pewaukee
Pewaukee's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 48° and 61°. The average high for September is 76° with an average low of 55°. 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.
