S
M
T
W
T
F
S
29
66°
45°
30
66°
47°
1
67°
45°
2
68°
47°
3
66°
48°
4
69°
47°
5
70°
43°
6
66°
41°
7
65°
40°
8
64°
42°
9
63°
46°
10
65°
46°
11
68°
45°
12
68°
46°
13
65°
45°
14
64°
44°
15
67°
43°
16
67°
44°
17
66°
46°
18
68°
47°
19
70°
48°
20
69°
41°
21
66°
40°
22
64°
44°
23
65°
47°
24
67°
43°
25
66°
42°
26
66°
46°
27
64°
46°
28
Hist. Avg.
69°
49°
29
Hist. Avg.
69°
49°
30
Hist. Avg.
69°
49°
31
Hist. Avg.
69°
49°
1
Hist. Avg.
69°
50°
2
Hist. Avg.
69°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Whittier
Whittier's December 2026 forecast shows daily high temperatures ranging from 63° to 70°, with overnight lows between 40° and 48°. The average high for December is 66° 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 Whittier. See also: January | February | March.
