S
M
T
W
T
F
S
30
82°
57°
31
73°
57°
1
85°
52°
2
85°
59°
3
87°
54°
4
89°
60°
5
87°
60°
6
88°
59°
7
87°
58°
8
88°
60°
9
86°
53°
10
86°
50°
11
86°
51°
12
87°
59°
13
90°
60°
14
77°
59°
15
76°
53°
16
80°
57°
17
68°
54°
18
76°
54°
19
76°
49°
20
75°
46°
21
76°
48°
22
74°
51°
23
74°
50°
24
75°
49°
25
75°
51°
26
74°
50°
27
76°
51°
28
74°
49°
29
68°
39°
30
70°
41°
1
72°
41°
2
66°
40°
3
67°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montrose
Montrose's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 39° and 57°. The average high for September is 73° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Montrose. See also: October | November | December.
