S
M
T
W
T
F
S
29
53°
34°
30
53°
34°
1
55°
38°
2
61°
32°
3
54°
33°
4
52°
38°
5
57°
48°
6
64°
46°
7
65°
39°
8
66°
34°
9
55°
39°
10
58°
44°
11
59°
43°
12
56°
39°
13
54°
34°
14
51°
31°
15
48°
35°
16
52°
39°
17
53°
44°
18
56°
45°
19
58°
48°
20
63°
43°
21
65°
39°
22
64°
42°
23
51°
36°
24
55°
43°
25
58°
43°
26
60°
38°
27
58°
30°
28
56°
34°
29
47°
27°
30
45°
25°
31
44°
26°
1
42°
30°
2
45°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pendleton
Pendleton's December 2026 forecast shows daily high temperatures ranging from 42° to 66°, with overnight lows between 25° and 48°. The average high for December is 55° with an average low of 37°. 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 Pendleton. See also: January | February | March.
