S
M
T
W
T
F
S
29
44°
32°
30
44°
33°
1
45°
40°
2
49°
40°
3
48°
38°
4
48°
36°
5
49°
33°
6
50°
33°
7
48°
35°
8
49°
39°
9
49°
38°
10
48°
34°
11
48°
33°
12
47°
35°
13
48°
38°
14
45°
37°
15
52°
37°
16
48°
40°
17
49°
38°
18
48°
39°
19
49°
38°
20
48°
39°
21
46°
40°
22
48°
39°
23
49°
36°
24
46°
32°
25
47°
30°
26
46°
30°
27
41°
31°
28
40°
32°
29
42°
30°
30
42°
37°
31
47°
39°
1
50°
34°
2
49°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Copalis Beach
Copalis Beach's December 2026 forecast shows daily high temperatures ranging from 40° to 52°, with overnight lows between 30° and 40°. The average high for December is 47° with an average low of 36°. 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 Copalis Beach. See also: January | February | March.
