S
M
T
W
T
F
S
29
50°
30°
30
47°
30°
1
44°
29°
2
50°
29°
3
43°
28°
4
42°
28°
5
47°
29°
6
40°
28°
7
44°
28°
8
44°
27°
9
39°
28°
10
38°
27°
11
36°
26°
12
41°
24°
13
36°
22°
14
38°
26°
15
42°
25°
16
42°
27°
17
43°
26°
18
44°
25°
19
41°
25°
20
34°
24°
21
33°
23°
22
41°
24°
23
35°
23°
24
29°
23°
25
28°
18°
26
32°
20°
27
36°
17°
28
35°
13°
29
34°
14°
30
33°
5°
31
29°
3°
1
23°
8°
2
24°
5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Firth
Firth's December 2026 forecast shows daily high temperatures ranging from 23° to 50°, with overnight lows between 3° and 30°. The average high for December is 38° with an average low of 22°. 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 Firth. See also: January | February | March.
