S
M
T
W
T
F
S
29
38°
18°
30
38°
12°
1
33°
4°
2
25°
1°
3
24°
-1°
4
18°
1°
5
18°
1°
6
21°
-1°
7
20°
-3°
8
21°
-1°
9
16°
-4°
10
18°
0°
11
18°
5°
12
20°
12°
13
32°
17°
14
33°
16°
15
32°
16°
16
32°
18°
17
36°
15°
18
36°
12°
19
33°
10°
20
27°
10°
21
25°
7°
22
22°
-2°
23
19°
-3°
24
17°
2°
25
16°
10°
26
22°
13°
27
29°
14°
28
30°
11°
29
31°
9°
30
15°
-3°
31
18°
-5°
1
14°
-8°
2
Hist. Avg.
22°
2°
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 14° to 38°, with overnight lows between -8° and 18°. The average high for December is 25° with an average low of 6°. 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.
