S
M
T
W
T
F
S
29
44°
24°
30
44°
24°
1
41°
23°
2
43°
23°
3
43°
22°
4
42°
23°
5
42°
22°
6
41°
21°
7
41°
21°
8
40°
22°
9
41°
21°
10
40°
21°
11
28°
10°
12
28°
14°
13
35°
17°
14
36°
16°
15
39°
19°
16
42°
18°
17
38°
18°
18
39°
17°
19
38°
14°
20
36°
15°
21
35°
14°
22
35°
7°
23
31°
6°
24
25°
12°
25
33°
13°
26
34°
14°
27
31°
2°
28
32°
-4°
29
26°
-2°
30
21°
3°
31
25°
-3°
1
22°
-7°
2
17°
-5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harlem
Harlem's December 2026 forecast shows daily high temperatures ranging from 17° to 44°, with overnight lows between -7° and 24°. The average high for December is 35° with an average low of 14°. 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 Harlem. See also: January | February | March.
