S
M
T
W
T
F
S
29
47°
25°
30
45°
25°
1
42°
24°
2
46°
24°
3
42°
23°
4
42°
23°
5
50°
24°
6
53°
23°
7
48°
22°
8
51°
23°
9
48°
23°
10
51°
22°
11
40°
5°
12
38°
5°
13
39°
9°
14
41°
12°
15
44°
18°
16
45°
19°
17
50°
19°
18
48°
17°
19
50°
19°
20
50°
16°
21
51°
20°
22
53°
10°
23
48°
5°
24
38°
4°
25
36°
13°
26
42°
17°
27
44°
20°
28
49°
18°
29
50°
21°
30
52°
21°
31
52°
16°
1
50°
7°
2
44°
8°
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 36° to 53°, with overnight lows between 4° and 25°. The average high for December is 46° with an average low of 17°. 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.
