S
M
T
W
T
F
S
30
75°
59°
31
75°
61°
1
76°
56°
2
80°
65°
3
83°
61°
4
83°
55°
5
79°
52°
6
77°
54°
7
79°
59°
8
80°
58°
9
78°
49°
10
71°
49°
11
69°
47°
12
69°
51°
13
71°
56°
14
70°
47°
15
68°
45°
16
66°
45°
17
66°
47°
18
67°
46°
19
65°
45°
20
66°
46°
21
67°
49°
22
70°
54°
23
72°
51°
24
75°
55°
25
74°
52°
26
74°
43°
27
64°
52°
28
66°
50°
29
68°
48°
30
64°
48°
1
63°
45°
2
62°
46°
3
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Arnolds Park
Arnolds Park's September 2026 forecast shows daily high temperatures ranging from 62° to 83°, with overnight lows between 43° and 65°. The average high for September is 71° 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 Arnolds Park. See also: October | November | December.
