S
M
T
W
T
F
S
29
50°
20°
30
37°
13°
1
35°
14°
2
38°
24°
3
46°
23°
4
38°
22°
5
36°
21°
6
35°
11°
7
33°
9°
8
36°
22°
9
44°
22°
10
45°
20°
11
45°
22°
12
47°
21°
13
46°
20°
14
38°
16°
15
37°
21°
16
41°
12°
17
39°
9°
18
35°
8°
19
36°
9°
20
34°
16°
21
38°
14°
22
37°
10°
23
37°
14°
24
38°
12°
25
38°
21°
26
37°
18°
27
42°
7°
28
37°
7°
29
35°
10°
30
37°
7°
31
35°
8°
1
34°
18°
2
38°
19°
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 33° to 50°, with overnight lows between 7° and 24°. The average high for December is 39° with an average low of 15°. 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.
