S
M
T
W
T
F
S
29
48°
38°
30
55°
35°
1
55°
33°
2
50°
39°
3
55°
32°
4
54°
31°
5
41°
29°
6
40°
29°
7
40°
30°
8
41°
34°
9
43°
40°
10
52°
36°
11
52°
35°
12
43°
32°
13
40°
34°
14
40°
31°
15
41°
26°
16
39°
24°
17
37°
27°
18
36°
35°
19
43°
36°
20
44°
31°
21
49°
32°
22
40°
39°
23
50°
40°
24
50°
36°
25
49°
34°
26
48°
34°
27
44°
36°
28
46°
37°
29
47°
37°
30
47°
38°
31
50°
35°
1
50°
34°
2
48°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Westchester
Westchester's December 2026 forecast shows daily high temperatures ranging from 36° to 55°, with overnight lows between 24° and 40°. The average high for December is 46° with an average low of 34°. 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 Westchester. See also: January | February | March.
