S
M
T
W
T
F
S
29
53°
40°
30
56°
40°
1
53°
38°
2
52°
33°
3
43°
31°
4
49°
31°
5
54°
38°
6
49°
35°
7
42°
26°
8
41°
23°
9
40°
24°
10
40°
29°
11
42°
34°
12
43°
28°
13
45°
26°
14
41°
23°
15
40°
28°
16
41°
32°
17
42°
30°
18
46°
28°
19
45°
23°
20
41°
22°
21
38°
22°
22
38°
24°
23
42°
27°
24
41°
26°
25
39°
21°
26
39°
19°
27
38°
21°
28
36°
21°
29
37°
20°
30
38°
23°
31
40°
20°
1
39°
18°
2
36°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Glendale
Glendale's December 2026 forecast shows daily high temperatures ranging from 36° to 56°, with overnight lows between 15° and 40°. The average high for December is 43° with an average low of 27°. 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 Glendale. See also: January | February | March.