S
M
T
W
T
F
S
30
79°
61°
31
83°
62°
1
82°
55°
2
79°
55°
3
79°
56°
4
80°
54°
5
78°
53°
6
79°
59°
7
83°
57°
8
79°
58°
9
82°
59°
10
83°
58°
11
81°
59°
12
82°
59°
13
82°
58°
14
81°
58°
15
83°
57°
16
82°
56°
17
79°
57°
18
80°
58°
19
79°
57°
20
79°
56°
21
80°
52°
22
79°
48°
23
75°
53°
24
72°
55°
25
72°
54°
26
Hist. Avg.
77°
55°
27
Hist. Avg.
76°
55°
28
Hist. Avg.
76°
54°
29
Hist. Avg.
76°
54°
30
Hist. Avg.
75°
54°
1
Hist. Avg.
75°
53°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
74°
52°
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 72° to 83°, with overnight lows between 48° and 62°. The average high for September is 80° 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.
