S
M
T
W
T
F
S
29
47°
36°
30
50°
35°
1
51°
35°
2
48°
32°
3
51°
21°
4
55°
20°
5
38°
19°
6
39°
22°
7
40°
22°
8
41°
18°
9
40°
17°
10
35°
17°
11
34°
20°
12
36°
19°
13
37°
20°
14
38°
21°
15
41°
23°
16
44°
23°
17
43°
29°
18
45°
30°
19
44°
29°
20
41°
27°
21
39°
29°
22
38°
26°
23
40°
21°
24
41°
19°
25
37°
24°
26
34°
22°
27
36°
18°
28
35°
20°
29
34°
22°
30
36°
24°
31
Hist. Avg.
40°
23°
1
Hist. Avg.
40°
23°
2
Hist. Avg.
40°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Westchester
Westchester's December 2026 forecast shows daily high temperatures ranging from 34° to 55°, with overnight lows between 17° and 36°. The average high for December is 41° with an average low of 24°. 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.
