S
M
T
W
T
F
S
30
93°
73°
31
92°
73°
1
91°
72°
2
93°
73°
3
94°
73°
4
93°
72°
5
92°
72°
6
92°
71°
7
91°
71°
8
93°
70°
9
93°
72°
10
92°
72°
11
93°
71°
12
93°
70°
13
92°
71°
14
91°
67°
15
92°
68°
16
91°
69°
17
92°
68°
18
92°
62°
19
87°
59°
20
81°
58°
21
83°
65°
22
85°
64°
23
88°
64°
24
88°
63°
25
87°
64°
26
87°
63°
27
84°
62°
28
84°
61°
29
80°
59°
30
80°
61°
1
85°
61°
2
85°
60°
3
84°
61°
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 80° to 94°, with overnight lows between 58° and 73°. The average high for September is 89° with an average low of 67°. 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.
