S
M
T
W
T
F
S
30
87°
69°
31
87°
69°
1
87°
73°
2
90°
72°
3
80°
70°
4
85°
68°
5
75°
67°
6
74°
62°
7
76°
60°
8
76°
65°
9
83°
69°
10
76°
61°
11
77°
60°
12
84°
64°
13
68°
53°
14
70°
49°
15
75°
63°
16
68°
59°
17
65°
61°
18
68°
60°
19
67°
61°
20
62°
59°
21
63°
56°
22
62°
55°
23
64°
55°
24
66°
57°
25
65°
52°
26
64°
49°
27
68°
47°
28
69°
50°
29
70°
50°
30
68°
60°
1
66°
59°
2
65°
47°
3
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Milwaukee
Milwaukee's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Milwaukee. See also: October | November | December.
