S
M
T
W
T
F
S
30
85°
62°
31
80°
70°
1
92°
72°
2
78°
70°
3
87°
70°
4
87°
70°
5
81°
64°
6
79°
63°
7
79°
60°
8
83°
63°
9
87°
71°
10
78°
65°
11
79°
58°
12
80°
66°
13
81°
66°
14
82°
63°
15
81°
64°
16
77°
61°
17
79°
61°
18
73°
57°
19
75°
56°
20
73°
56°
21
74°
55°
22
76°
61°
23
75°
61°
24
74°
60°
25
75°
60°
26
79°
59°
27
77°
57°
28
77°
59°
29
78°
60°
30
78°
59°
1
77°
58°
2
74°
57°
3
75°
55°
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 73° to 87°, with overnight lows between 55° and 71°. The average high for September is 78° with an average low of 60°. 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.
