S
M
T
W
T
F
S
29
59°
39°
30
61°
42°
1
59°
40°
2
58°
36°
3
56°
35°
4
56°
35°
5
58°
34°
6
57°
35°
7
54°
31°
8
55°
32°
9
55°
42°
10
61°
46°
11
66°
36°
12
52°
31°
13
63°
45°
14
64°
46°
15
Hist. Avg.
59°
39°
16
Hist. Avg.
59°
39°
17
Hist. Avg.
59°
39°
18
Hist. Avg.
59°
39°
19
Hist. Avg.
58°
38°
20
Hist. Avg.
58°
38°
21
Hist. Avg.
58°
38°
22
Hist. Avg.
58°
38°
23
Hist. Avg.
58°
38°
24
Hist. Avg.
58°
38°
25
Hist. Avg.
58°
38°
26
Hist. Avg.
57°
38°
27
Hist. Avg.
57°
38°
28
Hist. Avg.
57°
37°
29
Hist. Avg.
57°
37°
30
Hist. Avg.
57°
37°
31
Hist. Avg.
57°
37°
1
Hist. Avg.
57°
37°
2
Hist. Avg.
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Sylvan
Sylvan's December 2026 forecast shows daily high temperatures ranging from 52° to 66°, with overnight lows between 31° and 46°. The average high for December is 58° 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.
