S
M
T
W
T
F
S
29
69°
53°
30
67°
50°
1
64°
50°
2
66°
52°
3
64°
48°
4
63°
51°
5
63°
51°
6
69°
46°
7
64°
45°
8
63°
48°
9
64°
47°
10
63°
51°
11
68°
51°
12
69°
46°
13
65°
43°
14
61°
41°
15
59°
44°
16
60°
42°
17
59°
42°
18
60°
46°
19
61°
47°
20
62°
43°
21
64°
44°
22
63°
48°
23
62°
43°
24
62°
46°
25
60°
49°
26
64°
44°
27
63°
43°
28
62°
49°
29
63°
51°
30
65°
48°
31
67°
44°
1
66°
46°
2
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in San Simeon
San Simeon's December 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 41° and 53°. The average high for December is 64° with an average low of 47°. 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 San Simeon. See also: January | February | March.
