S
M
T
W
T
F
S
30
80°
54°
31
82°
58°
1
85°
55°
2
80°
54°
3
79°
61°
4
85°
60°
5
85°
61°
6
84°
59°
7
79°
53°
8
78°
52°
9
80°
59°
10
78°
59°
11
81°
60°
12
80°
58°
13
82°
53°
14
76°
50°
15
75°
50°
16
75°
49°
17
76°
52°
18
78°
55°
19
81°
57°
20
82°
56°
21
75°
52°
22
80°
54°
23
76°
53°
24
81°
47°
25
73°
45°
26
71°
45°
27
Hist. Avg.
72°
50°
28
Hist. Avg.
72°
50°
29
Hist. Avg.
72°
50°
30
Hist. Avg.
71°
49°
1
Hist. Avg.
71°
49°
2
Hist. Avg.
70°
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 71° to 85°, with overnight lows between 45° and 61°. The average high for September is 79° 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.
