S
M
T
W
T
F
S
30
77°
57°
31
78°
56°
1
79°
57°
2
76°
56°
3
76°
54°
4
77°
57°
5
77°
59°
6
75°
60°
7
78°
59°
8
82°
58°
9
78°
62°
10
80°
63°
11
82°
62°
12
82°
55°
13
81°
52°
14
74°
55°
15
75°
56°
16
74°
56°
17
73°
57°
18
78°
51°
19
73°
58°
20
73°
49°
21
77°
48°
22
69°
46°
23
72°
56°
24
76°
57°
25
Hist. Avg.
74°
52°
26
Hist. Avg.
73°
51°
27
Hist. Avg.
73°
51°
28
Hist. Avg.
73°
50°
29
Hist. Avg.
72°
50°
30
Hist. Avg.
72°
50°
1
Hist. Avg.
71°
49°
2
Hist. Avg.
71°
49°
3
Hist. Avg.
70°
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 69° to 82°, with overnight lows between 46° and 63°. 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.
