S
M
T
W
T
F
S
29
69°
56°
30
71°
56°
1
72°
57°
2
71°
56°
3
67°
53°
4
64°
45°
5
63°
46°
6
62°
49°
7
63°
44°
8
59°
41°
9
59°
41°
10
58°
42°
11
57°
40°
12
57°
47°
13
59°
52°
14
66°
47°
15
58°
45°
16
57°
41°
17
59°
40°
18
64°
47°
19
68°
47°
20
64°
46°
21
57°
46°
22
61°
48°
23
69°
39°
24
62°
37°
25
56°
38°
26
58°
51°
27
65°
53°
28
69°
51°
29
71°
46°
30
70°
45°
31
64°
49°
1
65°
36°
2
64°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pasadena
Pasadena's December 2026 forecast shows daily high temperatures ranging from 56° to 72°, with overnight lows between 35° and 57°. The average high for December is 63° with an average low of 46°. 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 Pasadena. See also: January | February | March.
