S
M
T
W
T
F
S
30
86°
58°
31
81°
56°
1
78°
62°
2
79°
60°
3
78°
55°
4
78°
55°
5
79°
60°
6
80°
61°
7
82°
58°
8
80°
55°
9
77°
60°
10
83°
53°
11
77°
52°
12
76°
52°
13
76°
54°
14
78°
58°
15
82°
58°
16
82°
57°
17
81°
57°
18
81°
55°
19
80°
48°
20
73°
49°
21
72°
53°
22
73°
55°
23
77°
55°
24
78°
56°
25
79°
50°
26
78°
46°
27
74°
48°
28
70°
46°
29
70°
46°
30
69°
51°
1
69°
53°
2
Hist. Avg.
74°
50°
3
Hist. Avg.
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Middletown
Middletown's September 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 46° and 62°. The average high for September is 77° with an average low of 54°. 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.
