S
M
T
W
T
F
S
29
37°
21°
30
36°
21°
1
37°
28°
2
41°
31°
3
42°
30°
4
41°
25°
5
39°
24°
6
36°
24°
7
36°
25°
8
37°
26°
9
38°
26°
10
35°
24°
11
37°
24°
12
36°
25°
13
40°
29°
14
40°
26°
15
45°
25°
16
44°
27°
17
39°
24°
18
44°
28°
19
47°
29°
20
45°
25°
21
42°
28°
22
46°
29°
23
46°
28°
24
45°
31°
25
43°
23°
26
45°
19°
27
36°
20°
28
35°
27°
29
39°
22°
30
39°
29°
31
41°
32°
1
46°
27°
2
46°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Fossil
Fossil's December 2026 forecast shows daily high temperatures ranging from 35° to 47°, with overnight lows between 19° and 32°. The average high for December is 41° with an average low of 26°. 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 Fossil. See also: January | February | March.
