S
M
T
W
T
F
S
29
46°
31°
30
48°
27°
1
43°
29°
2
47°
25°
3
42°
26°
4
42°
32°
5
48°
40°
6
54°
41°
7
56°
35°
8
57°
31°
9
44°
34°
10
48°
36°
11
51°
37°
12
52°
31°
13
47°
28°
14
41°
23°
15
38°
24°
16
38°
28°
17
40°
34°
18
42°
37°
19
47°
40°
20
53°
35°
21
55°
29°
22
53°
32°
23
43°
34°
24
51°
33°
25
46°
34°
26
48°
27°
27
42°
21°
28
43°
24°
29
36°
16°
30
35°
15°
31
34°
14°
1
30°
18°
2
34°
19°
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 30° to 57°, with overnight lows between 14° and 41°. The average high for December is 45° with an average low of 29°. 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.
