S
M
T
W
T
F
S
30
75°
54°
31
75°
53°
1
74°
54°
2
75°
55°
3
74°
56°
4
73°
55°
5
75°
55°
6
74°
54°
7
73°
52°
8
72°
51°
9
71°
52°
10
72°
57°
11
71°
51°
12
71°
51°
13
74°
50°
14
74°
57°
15
73°
57°
16
73°
53°
17
70°
50°
18
70°
49°
19
71°
50°
20
74°
55°
21
71°
50°
22
68°
51°
23
72°
53°
24
73°
54°
25
74°
53°
26
69°
45°
27
71°
47°
28
65°
46°
29
64°
45°
30
65°
45°
1
65°
45°
2
Hist. Avg.
68°
45°
3
Hist. Avg.
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Middletown
Middletown's September 2026 forecast shows daily high temperatures ranging from 64° to 75°, with overnight lows between 45° and 57°. The average high for September is 72° with an average low of 52°. 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 Middletown. See also: October | November | December.
