S
M
T
W
T
F
S
30
73°
49°
31
74°
54°
1
77°
56°
2
72°
57°
3
81°
57°
4
81°
56°
5
80°
52°
6
76°
47°
7
71°
50°
8
77°
53°
9
77°
47°
10
75°
53°
11
73°
46°
12
74°
51°
13
74°
53°
14
78°
47°
15
70°
49°
16
67°
50°
17
68°
51°
18
67°
49°
19
73°
42°
20
68°
48°
21
72°
42°
22
71°
45°
23
71°
42°
24
72°
42°
25
72°
49°
26
73°
48°
27
69°
50°
28
72°
48°
29
72°
40°
30
65°
45°
1
71°
48°
2
72°
45°
3
70°
41°
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 65° to 81°, with overnight lows between 40° and 57°. The average high for September is 73° with an average low of 49°. 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.
