S
M
T
W
T
F
S
30
77°
55°
31
79°
57°
1
81°
54°
2
77°
53°
3
76°
59°
4
80°
61°
5
82°
60°
6
81°
54°
7
77°
55°
8
75°
52°
9
78°
59°
10
78°
58°
11
76°
59°
12
75°
58°
13
76°
54°
14
73°
50°
15
71°
49°
16
71°
49°
17
72°
54°
18
76°
55°
19
78°
57°
20
79°
56°
21
74°
50°
22
77°
54°
23
71°
52°
24
77°
47°
25
70°
45°
26
67°
45°
27
Hist. Avg.
71°
50°
28
Hist. Avg.
70°
49°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
48°
1
Hist. Avg.
69°
48°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
68°
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 67° to 82°, with overnight lows between 45° and 61°. The average high for September is 76° 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.
