S
M
T
W
T
F
S
29
58°
43°
30
58°
41°
1
59°
39°
2
60°
30°
3
59°
26°
4
46°
24°
5
42°
23°
6
42°
24°
7
43°
26°
8
45°
27°
9
43°
27°
10
40°
23°
11
39°
23°
12
40°
27°
13
40°
23°
14
41°
20°
15
38°
19°
16
38°
22°
17
37°
33°
18
42°
37°
19
50°
36°
20
53°
35°
21
53°
38°
22
52°
40°
23
55°
36°
24
56°
33°
25
51°
31°
26
48°
35°
27
50°
36°
28
53°
39°
29
53°
37°
30
54°
34°
31
53°
30°
1
51°
26°
2
41°
24°
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 37° to 60°, with overnight lows between 19° and 43°. The average high for December is 48° 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 Lamar. See also: January | February | March.
