S
M
T
W
T
F
S
29
60°
40°
30
61°
52°
1
70°
51°
2
64°
47°
3
60°
44°
4
59°
44°
5
61°
45°
6
67°
50°
7
69°
45°
8
64°
43°
9
66°
49°
10
70°
50°
11
73°
36°
12
74°
32°
13
57°
34°
14
58°
35°
15
54°
33°
16
59°
39°
17
59°
45°
18
65°
48°
19
72°
46°
20
70°
45°
21
72°
48°
22
71°
50°
23
75°
35°
24
74°
32°
25
59°
31°
26
56°
33°
27
59°
48°
28
68°
50°
29
70°
50°
30
70°
52°
31
71°
48°
1
72°
39°
2
72°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Seguin
Seguin's December 2026 forecast shows daily high temperatures ranging from 54° to 75°, with overnight lows between 31° and 52°. The average high for December is 66° with an average low of 43°. 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 Seguin. See also: January | February | March.
