S
M
T
W
T
F
S
29
49°
36°
30
53°
40°
1
54°
41°
2
53°
40°
3
55°
38°
4
49°
36°
5
52°
32°
6
50°
37°
7
53°
36°
8
44°
32°
9
43°
29°
10
42°
28°
11
40°
33°
12
41°
32°
13
45°
30°
14
41°
27°
15
42°
28°
16
43°
29°
17
42°
30°
18
41°
34°
19
49°
32°
20
47°
23°
21
41°
24°
22
38°
25°
23
36°
29°
24
40°
27°
25
45°
26°
26
48°
18°
27
38°
18°
28
34°
21°
29
37°
20°
30
36°
29°
31
41°
29°
1
50°
22°
2
46°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Ardsley
Ardsley's December 2026 forecast shows daily high temperatures ranging from 34° to 55°, with overnight lows between 18° and 41°. The average high for December is 45° with an average low of 29°. 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 Ardsley. See also: January | February | March.