S
M
T
W
T
F
S
30
43°
34°
1
46°
29°
2
50°
43°
3
46°
39°
4
46°
39°
5
57°
46°
6
54°
48°
7
55°
48°
8
57°
50°
9
52°
46°
10
59°
54°
11
55°
46°
12
59°
46°
13
59°
48°
14
55°
46°
15
61°
50°
16
57°
50°
17
50°
41°
18
52°
39°
19
43°
37°
20
45°
41°
21
46°
43°
22
50°
37°
23
45°
36°
24
47°
34°
25
45°
36°
26
46°
34°
27
43°
34°
28
36°
32°
29
43°
30°
30
36°
32°
31
46°
28°
1
41°
32°
2
46°
41°
3
54°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Chehalis
Chehalis's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Chehalis. See also: January | February | March.
