S
M
T
W
T
F
S
29
63°
42°
30
63°
39°
1
62°
44°
2
62°
45°
3
59°
44°
4
57°
45°
5
58°
42°
6
57°
40°
7
58°
43°
8
57°
42°
9
59°
43°
10
57°
39°
11
56°
43°
12
57°
43°
13
60°
42°
14
60°
40°
15
59°
39°
16
58°
42°
17
59°
38°
18
53°
37°
19
54°
35°
20
52°
34°
21
53°
34°
22
53°
38°
23
54°
34°
24
54°
34°
25
52°
35°
26
53°
33°
27
52°
32°
28
53°
36°
29
55°
37°
30
55°
38°
31
59°
37°
1
56°
34°
2
54°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Healdsburg
Healdsburg's December 2026 forecast shows daily high temperatures ranging from 52° to 63°, with overnight lows between 32° and 45°. The average high for December is 57° with an average low of 39°. 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 Healdsburg. See also: January | February | March.
