S
M
T
W
T
F
S
29
59°
42°
30
65°
43°
1
63°
41°
2
65°
47°
3
69°
44°
4
60°
39°
5
56°
44°
6
55°
45°
7
60°
39°
8
59°
46°
9
65°
45°
10
67°
39°
11
55°
33°
12
58°
40°
13
63°
42°
14
64°
46°
15
67°
45°
16
65°
46°
17
67°
45°
18
67°
45°
19
66°
43°
20
63°
38°
21
58°
43°
22
66°
44°
23
66°
42°
24
61°
40°
25
50°
30°
26
53°
31°
27
52°
31°
28
59°
29°
29
55°
30°
30
53°
31°
31
55°
30°
1
55°
39°
2
58°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Blanco
Blanco's December 2026 forecast shows daily high temperatures ranging from 50° to 69°, with overnight lows between 29° and 47°. The average high for December is 61° with an average low of 40°. 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 Blanco. See also: January | February | March.