S
M
T
W
T
F
S
29
64°
49°
30
64°
47°
1
65°
46°
2
64°
48°
3
64°
48°
4
67°
47°
5
68°
46°
6
67°
47°
7
69°
47°
8
65°
45°
9
66°
46°
10
69°
51°
11
70°
52°
12
70°
50°
13
69°
52°
14
69°
48°
15
66°
47°
16
68°
44°
17
64°
45°
18
63°
46°
19
64°
47°
20
67°
46°
21
65°
46°
22
66°
47°
23
64°
47°
24
66°
49°
25
68°
51°
26
68°
43°
27
64°
46°
28
63°
50°
29
66°
51°
30
70°
51°
31
72°
50°
1
70°
52°
2
69°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Irvine
Irvine's December 2026 forecast shows daily high temperatures ranging from 63° to 72°, with overnight lows between 43° and 52°. The average high for December is 67° with an average low of 48°. 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 Irvine. See also: January | February | March.
