S
M
T
W
T
F
S
29
56°
39°
30
56°
36°
1
56°
35°
2
55°
26°
3
56°
22°
4
43°
21°
5
40°
22°
6
40°
21°
7
41°
23°
8
44°
26°
9
42°
25°
10
39°
22°
11
38°
20°
12
37°
24°
13
38°
20°
14
38°
19°
15
35°
14°
16
35°
16°
17
33°
29°
18
38°
34°
19
47°
33°
20
52°
29°
21
51°
34°
22
50°
38°
23
53°
34°
24
53°
30°
25
50°
29°
26
47°
32°
27
48°
33°
28
50°
36°
29
51°
35°
30
53°
32°
31
52°
29°
1
49°
25°
2
42°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Austin
Austin's December 2026 forecast shows daily high temperatures ranging from 33° to 56°, with overnight lows between 14° and 39°. The average high for December is 46° with an average low of 28°. 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 Austin. See also: January | February | March.
