S
M
T
W
T
F
S
30
84°
69°
31
87°
61°
1
84°
58°
2
83°
67°
3
84°
69°
4
89°
66°
5
90°
70°
6
85°
66°
7
82°
69°
8
80°
63°
9
79°
60°
10
75°
59°
11
74°
56°
12
74°
55°
13
70°
55°
14
69°
53°
15
73°
52°
16
77°
56°
17
77°
58°
18
76°
55°
19
76°
56°
20
77°
56°
21
75°
55°
22
75°
53°
23
74°
56°
24
76°
55°
25
74°
51°
26
64°
44°
27
62°
42°
28
61°
41°
29
68°
42°
30
60°
40°
1
61°
49°
2
60°
47°
3
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Owatonna
Owatonna's September 2026 forecast shows daily high temperatures ranging from 60° to 90°, with overnight lows between 40° and 70°. The average high for September is 74° with an average low of 55°. 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 Owatonna. See also: October | November | December.
