S
M
T
W
T
F
S
30
76°
60°
31
66°
60°
1
78°
65°
2
69°
64°
3
79°
64°
4
75°
62°
5
72°
58°
6
71°
54°
7
73°
51°
8
75°
52°
9
73°
61°
10
77°
55°
11
70°
50°
12
73°
61°
13
77°
55°
14
67°
47°
15
68°
56°
16
73°
56°
17
72°
53°
18
68°
46°
19
63°
45°
20
64°
45°
21
63°
46°
22
65°
47°
23
64°
44°
24
64°
48°
25
59°
39°
26
60°
43°
27
68°
47°
28
66°
42°
29
59°
37°
30
63°
47°
1
64°
43°
2
59°
41°
3
64°
46°
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 59° to 77°, with overnight lows between 37° and 61°. The average high for September is 66° with an average low of 47°. 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.
