S
M
T
W
T
F
S
29
64°
46°
30
63°
46°
1
67°
40°
2
63°
42°
3
62°
47°
4
62°
48°
5
64°
48°
6
67°
47°
7
66°
46°
8
65°
45°
9
62°
45°
10
64°
41°
11
63°
40°
12
65°
45°
13
Hist. Avg.
58°
44°
14
Hist. Avg.
58°
44°
15
Hist. Avg.
58°
44°
16
Hist. Avg.
58°
44°
17
Hist. Avg.
58°
44°
18
Hist. Avg.
58°
44°
19
Hist. Avg.
58°
44°
20
Hist. Avg.
58°
44°
21
Hist. Avg.
58°
44°
22
Hist. Avg.
58°
44°
23
Hist. Avg.
57°
44°
24
Hist. Avg.
57°
44°
25
Hist. Avg.
57°
44°
26
Hist. Avg.
57°
44°
27
Hist. Avg.
57°
44°
28
Hist. Avg.
57°
44°
29
Hist. Avg.
57°
44°
30
Hist. Avg.
57°
44°
31
Hist. Avg.
57°
44°
1
Hist. Avg.
58°
44°
2
Hist. Avg.
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Castroville
Castroville's December 2026 forecast shows daily high temperatures ranging from 62° to 67°, with overnight lows between 40° and 48°. The average high for December is 64° with an average low of 45°. 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 Castroville. See also: January | February | March.
