S
M
T
W
T
F
S
30
80°
55°
31
79°
55°
1
78°
56°
2
79°
57°
3
78°
61°
4
79°
55°
5
80°
56°
6
79°
55°
7
78°
53°
8
79°
54°
9
77°
55°
10
77°
54°
11
78°
52°
12
76°
52°
13
76°
53°
14
78°
54°
15
78°
58°
16
81°
57°
17
80°
52°
18
75°
49°
19
75°
53°
20
76°
52°
21
73°
49°
22
73°
53°
23
76°
54°
24
77°
55°
25
78°
54°
26
77°
46°
27
74°
46°
28
70°
47°
29
69°
47°
30
69°
45°
1
68°
46°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in District 3, Middletown
District 3, Middletown's September 2026 forecast shows daily high temperatures ranging from 68° to 81°, with overnight lows between 45° and 61°. The average high for September is 76° with an average low of 53°. 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 District 3, Middletown. See also: October | November | December.