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