S
M
T
W
T
F
S
29
47°
29°
30
45°
27°
1
44°
32°
2
44°
33°
3
51°
30°
4
49°
32°
5
42°
25°
6
43°
24°
7
41°
23°
8
37°
22°
9
37°
21°
10
39°
22°
11
37°
28°
12
42°
24°
13
46°
34°
14
49°
27°
15
47°
25°
16
Hist. Avg.
44°
27°
17
Hist. Avg.
44°
27°
18
Hist. Avg.
44°
27°
19
Hist. Avg.
43°
26°
20
Hist. Avg.
43°
26°
21
Hist. Avg.
43°
26°
22
Hist. Avg.
43°
26°
23
Hist. Avg.
42°
26°
24
Hist. Avg.
42°
26°
25
Hist. Avg.
42°
25°
26
Hist. Avg.
42°
25°
27
Hist. Avg.
42°
25°
28
Hist. Avg.
42°
25°
29
Hist. Avg.
41°
24°
30
Hist. Avg.
41°
24°
31
Hist. Avg.
41°
24°
1
Hist. Avg.
41°
24°
2
Hist. Avg.
41°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Lancaster
Lancaster's December 2026 forecast shows daily high temperatures ranging from 37° to 51°, with overnight lows between 21° and 34°. The average high for December is 44° with an average low of 27°. 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.
