S
M
T
W
T
F
S
29
56°
34°
30
47°
33°
1
46°
35°
2
45°
39°
3
48°
35°
4
48°
32°
5
45°
30°
6
44°
29°
7
44°
28°
8
40°
27°
9
41°
26°
10
40°
25°
11
38°
32°
12
45°
30°
13
Hist. Avg.
45°
33°
14
Hist. Avg.
45°
32°
15
Hist. Avg.
45°
32°
16
Hist. Avg.
44°
32°
17
Hist. Avg.
44°
32°
18
Hist. Avg.
44°
32°
19
Hist. Avg.
44°
31°
20
Hist. Avg.
43°
31°
21
Hist. Avg.
43°
31°
22
Hist. Avg.
43°
30°
23
Hist. Avg.
43°
30°
24
Hist. Avg.
42°
30°
25
Hist. Avg.
42°
30°
26
Hist. Avg.
42°
30°
27
Hist. Avg.
42°
29°
28
Hist. Avg.
42°
29°
29
Hist. Avg.
41°
29°
30
Hist. Avg.
41°
29°
31
Hist. Avg.
41°
28°
1
Hist. Avg.
41°
28°
2
Hist. Avg.
41°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Roslyn
Roslyn's December 2026 forecast shows daily high temperatures ranging from 38° to 56°, with overnight lows between 25° and 39°. The average high for December is 45° with an average low of 31°. 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 Roslyn. See also: January | February | March.
