S
M
T
W
T
F
S
30
87°
64°
31
91°
64°
1
85°
61°
2
88°
63°
3
88°
70°
4
91°
66°
5
82°
64°
6
77°
63°
7
82°
63°
8
82°
66°
9
81°
55°
10
81°
52°
11
84°
57°
12
73°
54°
13
70°
45°
14
61°
43°
15
72°
48°
16
75°
45°
17
72°
57°
18
61°
57°
19
63°
55°
20
64°
54°
21
63°
48°
22
64°
45°
23
70°
43°
24
68°
52°
25
72°
57°
26
61°
55°
27
64°
55°
28
73°
54°
29
68°
55°
30
72°
59°
1
64°
46°
2
63°
39°
3
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rosemount
Rosemount's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Rosemount. See also: October | November | December.