S
M
T
W
T
F
S
30
79°
60°
31
80°
56°
1
77°
55°
2
76°
54°
3
75°
53°
4
76°
53°
5
76°
54°
6
77°
57°
7
75°
55°
8
75°
56°
9
76°
52°
10
75°
56°
11
78°
59°
12
79°
59°
13
80°
58°
14
81°
57°
15
79°
53°
16
78°
56°
17
72°
58°
18
79°
57°
19
78°
56°
20
76°
51°
21
79°
47°
22
75°
46°
23
75°
53°
24
76°
55°
25
70°
46°
26
Hist. Avg.
71°
50°
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 70° to 81°, with overnight lows between 46° and 60°. The average high for September is 77° with an average low of 55°. 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.
