S
M
T
W
T
F
S
29
58°
42°
30
56°
43°
1
59°
41°
2
57°
41°
3
56°
36°
4
54°
33°
5
54°
36°
6
53°
40°
7
53°
38°
8
59°
39°
9
56°
33°
10
54°
38°
11
53°
34°
12
53°
31°
13
52°
30°
14
52°
32°
15
51°
33°
16
50°
31°
17
52°
30°
18
51°
31°
19
53°
32°
20
53°
32°
21
54°
33°
22
57°
35°
23
58°
37°
24
59°
39°
25
58°
34°
26
55°
33°
27
55°
37°
28
56°
37°
29
57°
32°
30
55°
32°
31
55°
34°
1
53°
33°
2
58°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Ukiah
Ukiah's December 2026 forecast shows daily high temperatures ranging from 50° to 59°, with overnight lows between 30° and 43°. The average high for December is 55° with an average low of 35°. 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 Ukiah. See also: January | February | March.
