S
M
T
W
T
F
S
30
75°
57°
31
77°
58°
1
72°
53°
2
77°
59°
3
81°
57°
4
82°
53°
5
76°
49°
6
75°
49°
7
76°
57°
8
78°
53°
9
79°
47°
10
70°
46°
11
68°
46°
12
68°
47°
13
70°
51°
14
69°
44°
15
67°
42°
16
65°
42°
17
66°
43°
18
66°
43°
19
67°
44°
20
66°
43°
21
67°
47°
22
70°
51°
23
71°
42°
24
74°
51°
25
71°
49°
26
72°
40°
27
63°
48°
28
64°
49°
29
64°
46°
30
65°
46°
1
64°
41°
2
60°
40°
3
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in River Falls
River Falls's September 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 40° and 59°. The average high for September is 70° with an average low of 48°. 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 River Falls. See also: October | November | December.
