S
M
T
W
T
F
S
29
36°
28°
30
39°
20°
1
31°
16°
2
30°
10°
3
28°
8°
4
25°
7°
5
22°
11°
6
24°
13°
7
26°
13°
8
27°
17°
9
29°
14°
10
26°
11°
11
25°
17°
12
27°
17°
13
30°
9°
14
26°
5°
15
22°
3°
16
18°
13°
17
27°
21°
18
35°
21°
19
34°
20°
20
38°
20°
21
34°
24°
22
38°
20°
23
38°
18°
24
33°
15°
25
28°
16°
26
30°
18°
27
30°
18°
28
32°
17°
29
31°
17°
30
32°
14°
31
31°
10°
1
27°
10°
2
20°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Crystal
Crystal's December 2026 forecast shows daily high temperatures ranging from 18° to 39°, 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 Crystal. See also: January | February | March.
