S
M
T
W
T
F
S
29
50°
40°
30
50°
40°
1
48°
39°
2
49°
40°
3
49°
39°
4
47°
40°
5
46°
38°
6
51°
33°
7
50°
36°
8
52°
39°
9
50°
38°
10
44°
37°
11
42°
36°
12
43°
31°
13
45°
38°
14
46°
39°
15
52°
38°
16
49°
35°
17
50°
32°
18
48°
32°
19
41°
30°
20
41°
34°
21
45°
30°
22
43°
28°
23
40°
30°
24
41°
37°
25
46°
37°
26
44°
35°
27
45°
29°
28
42°
30°
29
41°
29°
30
41°
29°
31
42°
30°
1
42°
31°
2
43°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Eugene
Eugene's December 2026 forecast shows daily high temperatures ranging from 40° to 52°, with overnight lows between 28° and 40°. The average high for December is 46° with an average low of 35°. 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 Eugene. See also: January | February | March.
