S
M
T
W
T
F
S
30
82°
55°
31
78°
54°
1
75°
55°
2
75°
50°
3
76°
51°
4
75°
58°
5
75°
59°
6
83°
57°
7
79°
49°
8
74°
50°
9
72°
53°
10
74°
56°
11
74°
50°
12
73°
52°
13
79°
56°
14
83°
47°
15
Hist. Avg.
75°
50°
16
Hist. Avg.
74°
49°
17
Hist. Avg.
74°
49°
18
Hist. Avg.
74°
48°
19
Hist. Avg.
73°
48°
20
Hist. Avg.
73°
47°
21
Hist. Avg.
72°
47°
22
Hist. Avg.
72°
46°
23
Hist. Avg.
72°
46°
24
Hist. Avg.
71°
45°
25
Hist. Avg.
71°
45°
26
Hist. Avg.
70°
44°
27
Hist. Avg.
70°
44°
28
Hist. Avg.
70°
44°
29
Hist. Avg.
69°
43°
30
Hist. Avg.
69°
43°
1
Hist. Avg.
68°
42°
2
Hist. Avg.
68°
42°
3
Hist. Avg.
68°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rock Rapids
Rock Rapids's September 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 47° and 59°. The average high for September is 77° with an average low of 53°. 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 Rock Rapids. See also: October | November | December.
