S
M
T
W
T
F
S
29
54°
37°
30
52°
34°
1
53°
36°
2
54°
36°
3
56°
37°
4
57°
38°
5
56°
43°
6
56°
40°
7
55°
46°
8
53°
35°
9
61°
42°
10
52°
36°
11
52°
34°
12
Hist. Avg.
56°
38°
13
Hist. Avg.
55°
38°
14
Hist. Avg.
55°
38°
15
Hist. Avg.
55°
38°
16
Hist. Avg.
55°
38°
17
Hist. Avg.
55°
38°
18
Hist. Avg.
55°
38°
19
Hist. Avg.
54°
38°
20
Hist. Avg.
54°
38°
21
Hist. Avg.
54°
37°
22
Hist. Avg.
54°
37°
23
Hist. Avg.
54°
37°
24
Hist. Avg.
54°
37°
25
Hist. Avg.
54°
37°
26
Hist. Avg.
54°
37°
27
Hist. Avg.
54°
37°
28
Hist. Avg.
54°
37°
29
Hist. Avg.
54°
37°
30
Hist. Avg.
53°
37°
31
Hist. Avg.
53°
37°
1
Hist. Avg.
54°
38°
2
Hist. Avg.
54°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Rocklin
Rocklin's December 2026 forecast shows daily high temperatures ranging from 52° to 61°, with overnight lows between 34° and 46°. The average high for December is 55° with an average low of 38°. 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 Rocklin. See also: January | February | March.
