S
M
T
W
T
F
S
30
77°
54°
31
75°
60°
1
81°
66°
2
70°
67°
3
84°
66°
4
82°
58°
5
77°
55°
6
74°
51°
7
76°
59°
8
73°
59°
9
77°
62°
10
82°
61°
11
75°
58°
12
73°
58°
13
75°
60°
14
69°
57°
15
73°
53°
16
69°
58°
17
72°
50°
18
68°
48°
19
75°
54°
20
76°
54°
21
73°
51°
22
72°
52°
23
69°
55°
24
74°
52°
25
70°
50°
26
73°
55°
27
72°
54°
28
70°
47°
29
63°
45°
30
65°
46°
1
63°
44°
2
63°
48°
3
62°
47°
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 62° to 84°, with overnight lows between 44° and 67°. The average high for September is 72° with an average low of 54°. 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.
