S
M
T
W
T
F
S
29
48°
24°
30
53°
20°
1
54°
21°
2
50°
22°
3
51°
23°
4
54°
25°
5
53°
24°
6
52°
18°
7
45°
14°
8
43°
21°
9
45°
20°
10
47°
22°
11
48°
13°
12
42°
12°
13
42°
14°
14
43°
16°
15
46°
15°
16
41°
20°
17
47°
16°
18
44°
20°
19
46°
13°
20
43°
14°
21
41°
11°
22
41°
12°
23
43°
12°
24
43°
9°
25
40°
8°
26
39°
6°
27
38°
7°
28
43°
11°
29
44°
12°
30
42°
11°
31
43°
14°
1
41°
9°
2
40°
7°
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 38° to 54°, with overnight lows between 6° and 25°. The average high for December is 45° with an average low of 15°. 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.
