S
M
T
W
T
F
S
29
40°
21°
30
28°
17°
1
32°
22°
2
41°
23°
3
41°
22°
4
40°
22°
5
37°
21°
6
32°
20°
7
26°
20°
8
40°
21°
9
40°
21°
10
39°
20°
11
40°
21°
12
39°
20°
13
38°
21°
14
34°
17°
15
34°
16°
16
35°
10°
17
31°
8°
18
29°
0°
19
27°
3°
20
20°
17°
21
34°
12°
22
34°
8°
23
30°
15°
24
34°
13°
25
34°
16°
26
32°
11°
27
34°
0°
28
28°
2°
29
20°
0°
30
20°
-2°
31
19°
5°
1
19°
14°
2
29°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lambert
Lambert's December 2026 forecast shows daily high temperatures ranging from 19° to 41°, with overnight lows between -2° and 23°. The average high for December is 32° with an average low of 14°. 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 Lambert. See also: January | February | March.
