S
M
T
W
T
F
S
29
62°
43°
30
63°
36°
1
53°
30°
2
46°
28°
3
50°
38°
4
55°
40°
5
51°
37°
6
47°
32°
7
47°
27°
8
44°
26°
9
44°
26°
10
45°
31°
11
50°
29°
12
55°
35°
13
52°
33°
14
50°
30°
15
48°
31°
16
46°
31°
17
46°
28°
18
44°
25°
19
43°
22°
20
42°
24°
21
44°
29°
22
50°
29°
23
44°
25°
24
42°
23°
25
42°
25°
26
43°
27°
27
43°
25°
28
44°
26°
29
44°
26°
30
45°
27°
31
45°
23°
1
42°
23°
2
42°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lamar
Lamar's December 2026 forecast shows daily high temperatures ranging from 42° to 63°, with overnight lows between 22° and 43°. The average high for December is 47° with an average low of 29°. 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 Lamar. See also: January | February | March.
