S
M
T
W
T
F
S
29
44°
38°
30
41°
35°
1
42°
40°
2
43°
40°
3
45°
39°
4
45°
40°
5
44°
39°
6
40°
40°
7
43°
38°
8
44°
37°
9
42°
40°
10
45°
40°
11
44°
36°
12
42°
39°
13
44°
39°
14
45°
40°
15
47°
40°
16
47°
39°
17
45°
32°
18
39°
30°
19
37°
32°
20
42°
36°
21
44°
34°
22
41°
34°
23
42°
32°
24
41°
29°
25
41°
29°
26
42°
33°
27
42°
31°
28
40°
30°
29
40°
34°
30
38°
31°
31
40°
33°
1
39°
30°
2
39°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Montecito
Montecito's December 2026 forecast shows daily high temperatures ranging from 37° to 47°, with overnight lows between 27° and 40°. The average high for December is 42° 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 Montecito. See also: January | February | March.
