S
M
T
W
T
F
S
29
34°
28°
30
41°
21°
1
32°
15°
2
29°
9°
3
28°
6°
4
26°
7°
5
23°
12°
6
25°
13°
7
27°
14°
8
27°
17°
9
28°
11°
10
25°
9°
11
24°
17°
12
28°
15°
13
30°
9°
14
24°
5°
15
21°
3°
16
18°
16°
17
28°
21°
18
34°
21°
19
34°
19°
20
38°
20°
21
33°
23°
22
37°
19°
23
38°
18°
24
32°
15°
25
28°
14°
26
29°
17°
27
30°
18°
28
32°
17°
29
31°
17°
30
31°
14°
31
30°
10°
1
27°
10°
2
20°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lafayette
Lafayette's December 2026 forecast shows daily high temperatures ranging from 18° to 41°, with overnight lows between 3° and 28°. The average high for December is 29° with an average low of 15°. 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 Lafayette. See also: January | February | March.
