S
M
T
W
T
F
S
29
59°
42°
30
63°
47°
1
64°
49°
2
63°
45°
3
64°
39°
4
53°
39°
5
54°
33°
6
53°
32°
7
52°
35°
8
52°
42°
9
56°
45°
10
58°
44°
11
52°
41°
12
53°
38°
13
62°
43°
14
62°
45°
15
64°
41°
16
59°
38°
17
57°
38°
18
50°
34°
19
53°
36°
20
57°
39°
21
58°
37°
22
63°
36°
23
62°
42°
24
62°
42°
25
61°
41°
26
56°
35°
27
60°
31°
28
52°
34°
29
60°
29°
30
51°
34°
31
52°
38°
1
51°
30°
2
50°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Sylvan
Sylvan's December 2026 forecast shows daily high temperatures ranging from 50° to 64°, with overnight lows between 28° and 49°. The average high for December is 57° with an average low of 38°. 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 Sylvan. See also: January | February | March.
