S
M
T
W
T
F
S
30
83°
64°
31
86°
63°
1
86°
63°
2
85°
62°
3
81°
62°
4
82°
60°
5
78°
61°
6
78°
55°
7
79°
61°
8
84°
55°
9
80°
60°
10
77°
62°
11
83°
60°
12
81°
59°
13
82°
59°
14
83°
58°
15
83°
59°
16
84°
60°
17
Hist. Avg.
77°
56°
18
Hist. Avg.
76°
55°
19
Hist. Avg.
76°
55°
20
Hist. Avg.
76°
54°
21
Hist. Avg.
75°
54°
22
Hist. Avg.
75°
53°
23
Hist. Avg.
74°
53°
24
Hist. Avg.
74°
52°
25
Hist. Avg.
73°
52°
26
Hist. Avg.
73°
52°
27
Hist. Avg.
73°
51°
28
Hist. Avg.
72°
51°
29
Hist. Avg.
72°
50°
30
Hist. Avg.
71°
50°
1
Hist. Avg.
71°
49°
2
Hist. Avg.
71°
49°
3
Hist. Avg.
70°
49°
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 77° to 86°, with overnight lows between 55° and 64°. The average high for September is 82° 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.
