S
M
T
W
T
F
S
29
51°
34°
30
50°
27°
1
42°
21°
2
36°
20°
3
42°
32°
4
46°
32°
5
41°
31°
6
36°
26°
7
35°
21°
8
33°
22°
9
38°
24°
10
41°
29°
11
43°
29°
12
47°
28°
13
44°
30°
14
39°
26°
15
41°
25°
16
40°
24°
17
37°
18°
18
34°
15°
19
33°
12°
20
30°
11°
21
28°
24°
22
35°
16°
23
35°
19°
24
34°
11°
25
30°
19°
26
30°
25°
27
36°
23°
28
35°
18°
29
33°
15°
30
30°
17°
31
29°
9°
1
30°
5°
2
26°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Oregon
Oregon's December 2026 forecast shows daily high temperatures ranging from 26° to 51°, with overnight lows between 5° and 34°. The average high for December is 37° 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 Oregon. See also: January | February | March.
