S
M
T
W
T
F
S
30
78°
53°
31
74°
55°
1
75°
52°
2
74°
52°
3
76°
57°
4
83°
58°
5
80°
58°
6
82°
57°
7
81°
56°
8
74°
58°
9
74°
51°
10
75°
51°
11
76°
54°
12
77°
54°
13
73°
54°
14
75°
57°
15
79°
57°
16
80°
50°
17
77°
45°
18
71°
43°
19
68°
44°
20
68°
45°
21
69°
48°
22
76°
55°
23
76°
54°
24
77°
46°
25
76°
41°
26
68°
42°
27
65°
42°
28
64°
40°
29
64°
42°
30
67°
51°
1
72°
44°
2
Hist. Avg.
70°
45°
3
Hist. Avg.
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coon Rapids
Coon Rapids's September 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 40° and 58°. The average high for September is 74° with an average low of 50°. 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 Coon Rapids. See also: October | November | December.