S
M
T
W
T
F
S
30
79°
51°
31
81°
54°
1
83°
55°
2
84°
54°
3
85°
58°
4
79°
57°
5
77°
51°
6
78°
52°
7
79°
54°
8
81°
54°
9
80°
56°
10
76°
54°
11
85°
58°
12
85°
54°
13
88°
55°
14
85°
52°
15
83°
47°
16
77°
49°
17
78°
49°
18
78°
48°
19
79°
50°
20
82°
50°
21
82°
49°
22
84°
49°
23
83°
52°
24
83°
51°
25
80°
47°
26
77°
48°
27
78°
46°
28
73°
44°
29
76°
44°
30
77°
45°
1
74°
44°
2
68°
39°
3
72°
41°
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 68° to 88°, with overnight lows between 39° and 58°. The average high for September is 80° with an average low of 50°. 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.
