S
M
T
W
T
F
S
29
45°
28°
30
48°
32°
1
47°
28°
2
43°
25°
3
44°
33°
4
50°
35°
5
49°
33°
6
50°
29°
7
40°
30°
8
42°
20°
9
38°
20°
10
35°
21°
11
35°
21°
12
36°
22°
13
36°
19°
14
37°
21°
15
41°
30°
16
46°
32°
17
48°
28°
18
39°
26°
19
37°
24°
20
37°
27°
21
37°
20°
22
31°
24°
23
38°
23°
24
37°
15°
25
33°
11°
26
27°
12°
27
27°
17°
28
32°
15°
29
37°
26°
30
43°
12°
31
45°
11°
1
28°
14°
2
27°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mount Kisco
Mount Kisco's December 2026 forecast shows daily high temperatures ranging from 27° to 50°, with overnight lows between 11° and 35°. The average high for December is 39° with an average low of 23°. 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 Mount Kisco. See also: January | February | March.
