S
M
T
W
T
F
S
29
35°
26°
30
36°
23°
1
34°
20°
2
32°
26°
3
33°
20°
4
36°
19°
5
30°
25°
6
34°
31°
7
36°
34°
8
43°
32°
9
48°
29°
10
43°
26°
11
37°
27°
12
35°
23°
13
34°
23°
14
30°
24°
15
29°
21°
16
29°
22°
17
31°
17°
18
32°
18°
19
29°
15°
20
34°
27°
21
33°
25°
22
38°
11°
23
37°
17°
24
28°
28°
25
38°
20°
26
38°
11°
27
35°
13°
28
22°
7°
29
29°
8°
30
21°
13°
31
37°
11°
1
35°
7°
2
Hist. Avg.
30°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Williston
Williston's December 2026 forecast shows daily high temperatures ranging from 21° to 48°, with overnight lows between 7° and 34°. The average high for December is 34° with an average low of 21°. 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 Williston. See also: January | February | March.
