S
M
T
W
T
F
S
29
64°
45°
30
61°
46°
1
64°
40°
2
49°
34°
3
49°
31°
4
54°
37°
5
57°
40°
6
49°
34°
7
48°
32°
8
47°
29°
9
46°
31°
10
45°
29°
11
47°
31°
12
51°
34°
13
53°
31°
14
49°
33°
15
49°
38°
16
48°
38°
17
49°
32°
18
51°
29°
19
47°
28°
20
46°
27°
21
45°
28°
22
47°
31°
23
47°
31°
24
44°
27°
25
44°
27°
26
45°
28°
27
45°
27°
28
46°
27°
29
45°
31°
30
45°
28°
31
46°
27°
1
43°
25°
2
42°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lyon
Lyon's December 2026 forecast shows daily high temperatures ranging from 42° to 64°, with overnight lows between 25° and 46°. The average high for December is 49° 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 Lyon. See also: January | February | March.
