S
M
T
W
T
F
S
30
78°
47°
31
71°
52°
1
74°
50°
2
74°
46°
3
68°
55°
4
71°
60°
5
61°
55°
6
57°
52°
7
66°
50°
8
70°
42°
9
66°
53°
10
73°
55°
11
69°
48°
12
69°
46°
13
72°
53°
14
71°
48°
15
71°
52°
16
70°
51°
17
69°
48°
18
66°
48°
19
65°
45°
20
64°
45°
21
68°
44°
22
62°
48°
23
65°
47°
24
68°
47°
25
65°
48°
26
67°
46°
27
59°
44°
28
61°
46°
29
67°
46°
30
67°
45°
1
66°
46°
2
66°
46°
3
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Middleton
Middleton's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 42° and 55°. The average high for September is 67° with an average low of 47°. 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 Middleton. See also: October | November | December.
