S
M
T
W
T
F
S
29
44°
33°
30
48°
34°
1
43°
34°
2
43°
33°
3
42°
33°
4
43°
32°
5
48°
32°
6
52°
31°
7
51°
31°
8
50°
27°
9
40°
25°
10
39°
30°
11
50°
16°
12
41°
10°
13
32°
10°
14
31°
21°
15
36°
20°
16
37°
27°
17
40°
22°
18
43°
26°
19
45°
28°
20
48°
24°
21
48°
29°
22
47°
24°
23
50°
14°
24
45°
11°
25
32°
14°
26
34°
20°
27
39°
27°
28
45°
27°
29
51°
32°
30
52°
32°
31
53°
24°
1
53°
15°
2
52°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lyons
Lyons's December 2026 forecast shows daily high temperatures ranging from 31° to 53°, with overnight lows between 10° and 34°. The average high for December is 44° with an average low of 25°. 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 Lyons. See also: January | February | March.
