S
M
T
W
T
F
S
29
49°
37°
30
50°
39°
1
53°
39°
2
51°
38°
3
53°
40°
4
42°
34°
5
56°
30°
6
58°
28°
7
44°
26°
8
43°
24°
9
42°
21°
10
40°
19°
11
37°
20°
12
36°
23°
13
38°
23°
14
39°
24°
15
39°
30°
16
42°
33°
17
53°
25°
18
52°
25°
19
41°
24°
20
40°
23°
21
41°
22°
22
37°
21°
23
38°
23°
24
41°
34°
25
47°
38°
26
52°
33°
27
54°
30°
28
52°
27°
29
43°
28°
30
43°
30°
31
42°
27°
1
44°
25°
2
42°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Middletown
Middletown's December 2026 forecast shows daily high temperatures ranging from 36° to 58°, with overnight lows between 19° and 40°. The average high for December is 45° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Middletown. See also: January | February | March.
