S
M
T
W
T
F
S
29
48°
40°
30
57°
37°
1
59°
33°
2
52°
34°
3
55°
28°
4
56°
26°
5
43°
27°
6
41°
24°
7
41°
25°
8
43°
29°
9
42°
29°
10
55°
32°
11
42°
29°
12
43°
29°
13
41°
27°
14
42°
25°
15
40°
23°
16
40°
20°
17
37°
23°
18
38°
33°
19
45°
36°
20
47°
29°
21
52°
30°
22
45°
38°
23
53°
39°
24
54°
36°
25
53°
34°
26
52°
33°
27
45°
36°
28
49°
37°
29
52°
38°
30
52°
39°
31
54°
35°
1
54°
31°
2
50°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Frederick
Frederick's December 2026 forecast shows daily high temperatures ranging from 37° to 59°, with overnight lows between 20° and 40°. The average high for December is 48° with an average low of 31°. 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 Frederick. See also: January | February | March.
