S
M
T
W
T
F
S
29
56°
34°
30
47°
33°
1
46°
36°
2
46°
40°
3
48°
36°
4
49°
32°
5
46°
31°
6
45°
30°
7
44°
29°
8
41°
28°
9
42°
27°
10
41°
26°
11
39°
33°
12
46°
30°
13
42°
33°
14
Hist. Avg.
45°
31°
15
Hist. Avg.
44°
31°
16
Hist. Avg.
44°
31°
17
Hist. Avg.
44°
30°
18
Hist. Avg.
44°
30°
19
Hist. Avg.
43°
30°
20
Hist. Avg.
43°
30°
21
Hist. Avg.
43°
30°
22
Hist. Avg.
43°
29°
23
Hist. Avg.
42°
29°
24
Hist. Avg.
42°
29°
25
Hist. Avg.
42°
29°
26
Hist. Avg.
42°
28°
27
Hist. Avg.
41°
28°
28
Hist. Avg.
41°
28°
29
Hist. Avg.
41°
28°
30
Hist. Avg.
41°
28°
31
Hist. Avg.
41°
27°
1
Hist. Avg.
40°
27°
2
Hist. Avg.
40°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Uniondale
Uniondale's December 2026 forecast shows daily high temperatures ranging from 39° to 56°, with overnight lows between 26° and 40°. The average high for December is 45° with an average low of 32°. 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 Uniondale. See also: January | February | March.
