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