S
M
T
W
T
F
S
30
81°
61°
31
81°
62°
1
82°
62°
2
81°
57°
3
81°
53°
4
79°
53°
5
78°
54°
6
80°
53°
7
82°
54°
8
84°
60°
9
85°
60°
10
82°
52°
11
79°
53°
12
79°
57°
13
80°
50°
14
78°
51°
15
75°
50°
16
76°
49°
17
77°
53°
18
78°
51°
19
80°
53°
20
79°
54°
21
82°
54°
22
79°
56°
23
83°
56°
24
76°
55°
25
78°
56°
26
80°
55°
27
82°
55°
28
82°
54°
29
81°
54°
30
81°
53°
1
80°
54°
2
81°
47°
3
81°
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 75° to 85°, with overnight lows between 43° and 62°. The average high for September is 80° with an average low of 54°. 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.
