S
M
T
W
T
F
S
30
82°
69°
31
84°
63°
1
89°
63°
2
88°
64°
3
86°
70°
4
90°
70°
5
81°
68°
6
70°
64°
7
77°
66°
8
81°
64°
9
81°
55°
10
79°
50°
11
81°
54°
12
70°
50°
13
68°
45°
14
66°
52°
15
68°
52°
16
73°
50°
17
68°
63°
18
72°
61°
19
63°
59°
20
66°
57°
21
55°
48°
22
60°
44°
23
62°
52°
24
62°
52°
25
67°
54°
26
63°
53°
27
66°
52°
28
67°
53°
29
65°
47°
30
70°
51°
1
69°
50°
2
67°
43°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Mills
Lake Mills's September 2026 forecast shows daily high temperatures ranging from 55° to 70°, with overnight lows between 43° and 54°. The average high for September is 64° 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 Lake Mills. See also: October | November | December.
