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