S
M
T
W
T
F
S
29
65°
50°
30
66°
53°
1
68°
54°
2
64°
54°
3
66°
53°
4
64°
50°
5
65°
49°
6
64°
49°
7
66°
50°
8
67°
50°
9
68°
49°
10
69°
50°
11
68°
51°
12
67°
52°
13
67°
49°
14
65°
50°
15
68°
49°
16
66°
49°
17
Hist. Avg.
68°
48°
18
Hist. Avg.
68°
48°
19
Hist. Avg.
68°
48°
20
Hist. Avg.
68°
48°
21
Hist. Avg.
68°
48°
22
Hist. Avg.
68°
48°
23
Hist. Avg.
68°
48°
24
Hist. Avg.
68°
48°
25
Hist. Avg.
68°
48°
26
Hist. Avg.
68°
48°
27
Hist. Avg.
68°
48°
28
Hist. Avg.
68°
48°
29
Hist. Avg.
68°
48°
30
Hist. Avg.
68°
48°
31
Hist. Avg.
69°
48°
1
Hist. Avg.
69°
48°
2
Hist. Avg.
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Irvine
Irvine's December 2026 forecast shows daily high temperatures ranging from 64° to 69°, with overnight lows between 49° and 54°. The average high for December is 66° with an average low of 51°. 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.
