S
M
T
W
T
F
S
29
75°
55°
30
73°
54°
1
74°
48°
2
71°
51°
3
68°
53°
4
65°
46°
5
67°
51°
6
67°
54°
7
72°
54°
8
72°
53°
9
71°
52°
10
72°
42°
11
72°
41°
12
58°
42°
13
58°
41°
14
61°
39°
15
58°
40°
16
57°
44°
17
60°
46°
18
68°
48°
19
64°
50°
20
66°
51°
21
63°
53°
22
71°
54°
23
70°
50°
24
72°
42°
25
69°
50°
26
64°
50°
27
60°
40°
28
62°
39°
29
Hist. Avg.
65°
43°
30
Hist. Avg.
65°
43°
31
Hist. Avg.
65°
43°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in San Blas
San Blas's December 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 39° and 55°. 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 San Blas. See also: January | February | March.
