S
M
T
W
T
F
S
30
98°
70°
31
93°
67°
1
90°
64°
2
92°
63°
3
94°
73°
4
99°
66°
5
92°
69°
6
83°
67°
7
86°
67°
8
86°
60°
9
81°
55°
10
85°
51°
11
88°
66°
12
73°
51°
13
71°
49°
14
67°
54°
15
73°
51°
16
74°
46°
17
73°
61°
18
70°
61°
19
68°
59°
20
62°
56°
21
58°
53°
22
62°
54°
23
70°
55°
24
62°
58°
25
63°
58°
26
66°
60°
27
73°
63°
28
71°
63°
29
72°
62°
30
74°
59°
1
65°
40°
2
61°
45°
3
70°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dell Rapids
Dell Rapids's September 2026 forecast shows daily high temperatures ranging from 61° to 70°, with overnight lows between 40° and 45°. The average high for September is 65° with an average low of 43°. 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 Dell Rapids. See also: October | November | December.