S
M
T
W
T
F
S
29
42°
30°
30
44°
31°
1
44°
33°
2
43°
29°
3
41°
20°
4
39°
21°
5
30°
30°
6
37°
34°
7
40°
33°
8
46°
30°
9
31°
21°
10
33°
19°
11
Hist. Avg.
39°
26°
12
Hist. Avg.
38°
26°
13
Hist. Avg.
38°
26°
14
Hist. Avg.
38°
25°
15
Hist. Avg.
38°
25°
16
Hist. Avg.
37°
25°
17
Hist. Avg.
37°
25°
18
Hist. Avg.
37°
24°
19
Hist. Avg.
36°
24°
20
Hist. Avg.
36°
24°
21
Hist. Avg.
36°
24°
22
Hist. Avg.
36°
23°
23
Hist. Avg.
36°
23°
24
Hist. Avg.
35°
23°
25
Hist. Avg.
35°
23°
26
Hist. Avg.
35°
22°
27
Hist. Avg.
35°
22°
28
Hist. Avg.
34°
22°
29
Hist. Avg.
34°
22°
30
Hist. Avg.
34°
22°
31
Hist. Avg.
34°
21°
1
Hist. Avg.
34°
21°
2
Hist. Avg.
34°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Lyons
Lyons's December 2026 forecast shows daily high temperatures ranging from 30° to 46°, with overnight lows between 19° and 34°. The average high for December is 39° 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 Lyons. See also: January | February | March.
