S
M
T
W
T
F
S
29
44°
30°
30
40°
29°
1
39°
23°
2
40°
29°
3
44°
30°
4
38°
28°
5
42°
26°
6
43°
24°
7
40°
25°
8
46°
29°
9
46°
25°
10
40°
21°
11
36°
15°
12
33°
16°
13
35°
17°
14
39°
18°
15
37°
26°
16
44°
25°
17
46°
26°
18
39°
26°
19
38°
27°
20
38°
25°
21
39°
22°
22
39°
16°
23
38°
11°
24
29°
12°
25
30°
17°
26
37°
25°
27
40°
24°
28
41°
24°
29
36°
28°
30
39°
24°
31
41°
14°
1
37°
12°
2
30°
12°
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 46°, with overnight lows between 11° and 30°. The average high for December is 39° with an average low of 22°. 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.
