S
M
T
W
T
F
S
30
77°
61°
31
78°
56°
1
77°
57°
2
77°
55°
3
75°
53°
4
76°
53°
5
76°
58°
6
77°
58°
7
76°
57°
8
76°
57°
9
75°
53°
10
76°
60°
11
80°
61°
12
79°
60°
13
81°
59°
14
79°
60°
15
81°
59°
16
78°
58°
17
79°
59°
18
80°
58°
19
78°
57°
20
77°
51°
21
79°
48°
22
73°
47°
23
70°
54°
24
73°
56°
25
Hist. Avg.
74°
52°
26
Hist. Avg.
73°
52°
27
Hist. Avg.
73°
52°
28
Hist. Avg.
72°
51°
29
Hist. Avg.
72°
51°
30
Hist. Avg.
72°
51°
1
Hist. Avg.
71°
50°
2
Hist. Avg.
71°
50°
3
Hist. Avg.
70°
50°
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 70° to 81°, with overnight lows between 47° and 61°. The average high for September is 77° with an average low of 56°. 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.
