S
M
T
W
T
F
S
30
88°
57°
31
79°
61°
1
79°
61°
2
86°
64°
3
88°
66°
4
88°
64°
5
87°
59°
6
85°
55°
7
78°
54°
8
77°
56°
9
79°
62°
10
81°
59°
11
77°
53°
12
74°
52°
13
75°
58°
14
76°
59°
15
80°
50°
16
82°
49°
17
72°
49°
18
72°
50°
19
73°
49°
20
71°
49°
21
71°
48°
22
72°
48°
23
72°
49°
24
75°
52°
25
77°
55°
26
78°
54°
27
79°
52°
28
71°
56°
29
77°
46°
30
78°
48°
1
70°
51°
2
69°
44°
3
67°
50°
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 67° to 88°, with overnight lows between 44° and 66°. The average high for September is 77° 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.
