S
M
T
W
T
F
S
29
43°
38°
30
48°
33°
1
52°
28°
2
43°
37°
3
45°
32°
4
52°
29°
5
44°
32°
6
46°
40°
7
50°
36°
8
52°
30°
9
50°
32°
10
42°
35°
11
45°
36°
12
49°
34°
13
49°
34°
14
44°
35°
15
45°
34°
16
50°
28°
17
50°
26°
18
41°
26°
19
42°
27°
20
40°
33°
21
43°
34°
22
49°
33°
23
47°
34°
24
47°
33°
25
46°
29°
26
44°
23°
27
38°
25°
28
39°
27°
29
41°
24°
30
39°
23°
31
38°
32°
1
47°
16°
2
50°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lancaster
Lancaster's December 2026 forecast shows daily high temperatures ranging from 38° to 52°, with overnight lows between 13° and 40°. The average high for December is 45° with an average low of 30°. 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 Lancaster. See also: January | February | March.
