S
M
T
W
T
F
S
29
45°
30°
30
48°
32°
1
47°
31°
2
46°
32°
3
48°
30°
4
47°
29°
5
46°
28°
6
44°
29°
7
47°
28°
8
41°
27°
9
37°
27°
10
38°
26°
11
37°
26°
12
38°
25°
13
39°
21°
14
39°
14°
15
34°
15°
16
30°
18°
17
32°
16°
18
31°
23°
19
38°
22°
20
41°
20°
21
36°
15°
22
33°
17°
23
32°
11°
24
32°
19°
25
33°
15°
26
39°
10°
27
31°
11°
28
26°
11°
29
30°
10°
30
28°
14°
31
30°
21°
1
42°
17°
2
40°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lyman
Lyman's December 2026 forecast shows daily high temperatures ranging from 26° to 48°, with overnight lows between 10° and 32°. The average high for December is 38° with an average low of 21°. 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 Lyman. See also: January | February | March.
