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
77°
65°
10
75°
54°
11
69°
46°
12
73°
58°
13
73°
56°
14
72°
55°
15
73°
54°
16
68°
50°
17
68°
49°
18
61°
46°
19
60°
43°
20
62°
42°
21
64°
44°
22
62°
49°
23
64°
49°
24
64°
48°
25
66°
48°
26
69°
46°
27
63°
40°
28
67°
47°
29
69°
48°
30
70°
48°
1
69°
47°
2
67°
46°
3
66°
43°
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 60° to 77°, with overnight lows between 40° and 65°. The average high for September is 68° with an average low of 49°. 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.
