S
M
T
W
T
F
S
30
82°
66°
31
82°
63°
1
81°
55°
2
82°
57°
3
90°
64°
4
82°
63°
5
81°
63°
6
82°
64°
7
76°
66°
8
83°
57°
9
73°
52°
10
81°
60°
11
79°
52°
12
66°
50°
13
63°
49°
14
62°
48°
15
65°
52°
16
70°
55°
17
70°
52°
18
65°
48°
19
65°
48°
20
69°
47°
21
66°
53°
22
71°
54°
23
71°
54°
24
70°
52°
25
66°
52°
26
67°
51°
27
69°
53°
28
69°
52°
29
66°
50°
30
58°
49°
1
57°
46°
2
55°
41°
3
54°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ottertail
Ottertail's September 2026 forecast shows daily high temperatures ranging from 54° to 83°, with overnight lows between 41° and 66°. The average high for September is 68° with an average low of 51°. 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 Ottertail. See also: October | November | December.
