S
M
T
W
T
F
S
29
51°
41°
30
56°
41°
1
55°
40°
2
55°
35°
3
44°
33°
4
50°
33°
5
55°
40°
6
50°
36°
7
42°
29°
8
41°
25°
9
40°
25°
10
42°
29°
11
40°
31°
12
41°
28°
13
42°
26°
14
41°
24°
15
40°
30°
16
41°
32°
17
43°
33°
18
47°
29°
19
46°
24°
20
41°
23°
21
38°
23°
22
38°
24°
23
42°
28°
24
40°
24°
25
39°
23°
26
38°
20°
27
38°
22°
28
37°
21°
29
38°
23°
30
39°
26°
31
43°
22°
1
42°
19°
2
37°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Nancy
Nancy's December 2026 forecast shows daily high temperatures ranging from 37° to 56°, with overnight lows between 17° and 41°. The average high for December is 43° with an average low of 28°. 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 Nancy. See also: January | February | March.