S
M
T
W
T
F
S
30
86°
55°
31
80°
56°
1
80°
55°
2
79°
55°
3
80°
60°
4
80°
54°
5
84°
55°
6
80°
54°
7
79°
53°
8
78°
54°
9
79°
53°
10
81°
58°
11
81°
59°
12
77°
58°
13
76°
58°
14
75°
50°
15
74°
49°
16
Hist. Avg.
78°
55°
17
Hist. Avg.
78°
55°
18
Hist. Avg.
77°
54°
19
Hist. Avg.
77°
54°
20
Hist. Avg.
77°
53°
21
Hist. Avg.
76°
53°
22
Hist. Avg.
76°
53°
23
Hist. Avg.
76°
52°
24
Hist. Avg.
75°
52°
25
Hist. Avg.
75°
51°
26
Hist. Avg.
74°
51°
27
Hist. Avg.
74°
50°
28
Hist. Avg.
74°
50°
29
Hist. Avg.
74°
50°
30
Hist. Avg.
73°
49°
1
Hist. Avg.
73°
49°
2
Hist. Avg.
73°
48°
3
Hist. Avg.
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Middletown
Middletown's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 49° and 60°. The average high for September is 79° with an average low of 55°. 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.
