S
M
T
W
T
F
S
30
90°
65°
31
94°
64°
1
96°
68°
2
97°
69°
3
96°
70°
4
96°
70°
5
95°
69°
6
84°
60°
7
83°
56°
8
91°
57°
9
80°
65°
10
75°
62°
11
82°
64°
12
90°
61°
13
80°
54°
14
82°
53°
15
97°
65°
16
88°
70°
17
95°
69°
18
80°
69°
19
84°
68°
20
81°
64°
21
65°
60°
22
72°
57°
23
70°
58°
24
71°
57°
25
70°
53°
26
77°
52°
27
79°
52°
28
78°
42°
29
83°
43°
30
76°
61°
1
83°
61°
2
72°
46°
3
74°
42°
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 ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
