S
M
T
W
T
F
S
29
43°
31°
30
44°
33°
1
43°
32°
2
42°
33°
3
45°
30°
4
43°
30°
5
43°
29°
6
42°
31°
7
43°
28°
8
36°
28°
9
34°
29°
10
37°
28°
11
37°
28°
12
36°
26°
13
37°
19°
14
35°
18°
15
31°
17°
16
28°
17°
17
30°
18°
18
30°
24°
19
31°
23°
20
35°
22°
21
35°
21°
22
32°
19°
23
32°
8°
24
30°
17°
25
24°
17°
26
25°
8°
27
25°
5°
28
22°
8°
29
24°
8°
30
24°
14°
31
26°
20°
1
33°
17°
2
33°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Fairfield
Fairfield's December 2026 forecast shows daily high temperatures ranging from 22° to 45°, with overnight lows between 5° and 33°. 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 Fairfield. See also: January | February | March.
