S
M
T
W
T
F
S
29
54°
21°
30
53°
22°
1
53°
22°
2
52°
24°
3
51°
26°
4
49°
24°
5
50°
19°
6
46°
19°
7
48°
21°
8
49°
21°
9
48°
20°
10
47°
22°
11
43°
16°
12
42°
12°
13
39°
9°
14
37°
8°
15
36°
9°
16
37°
9°
17
37°
10°
18
38°
11°
19
42°
12°
20
43°
18°
21
44°
18°
22
41°
17°
23
41°
9°
24
38°
7°
25
33°
8°
26
35°
10°
27
38°
11°
28
44°
12°
29
45°
14°
30
46°
15°
31
44°
16°
1
45°
13°
2
43°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Green River
Green River's December 2026 forecast shows daily high temperatures ranging from 33° to 54°, with overnight lows between 7° and 26°. The average high for December is 44° with an average low of 15°. 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 Green River. See also: January | February | March.
