S
M
T
W
T
F
S
30
83°
65°
31
84°
64°
1
83°
63°
2
84°
65°
3
85°
65°
4
84°
64°
5
84°
64°
6
83°
65°
7
84°
62°
8
76°
61°
9
80°
61°
10
81°
62°
11
82°
62°
12
80°
60°
13
77°
57°
14
66°
52°
15
68°
58°
16
68°
56°
17
69°
52°
18
68°
50°
19
74°
55°
20
75°
57°
21
74°
56°
22
71°
53°
23
77°
50°
24
70°
55°
25
67°
55°
26
68°
50°
27
74°
41°
28
66°
45°
29
66°
50°
30
65°
49°
1
66°
52°
2
69°
55°
3
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Okoboji
Okoboji's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 41° and 65°. The average high for September is 75° with an average low of 57°. 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 Okoboji. See also: October | November | December.
