S
M
T
W
T
F
S
30
88°
64°
31
88°
63°
1
91°
58°
2
86°
63°
3
84°
68°
4
84°
64°
5
84°
64°
6
81°
63°
7
N/A
8
76°
58°
9
81°
53°
10
78°
60°
11
81°
58°
12
76°
52°
13
65°
53°
14
68°
48°
15
67°
47°
16
71°
48°
17
66°
47°
18
66°
47°
19
68°
46°
20
67°
48°
21
70°
47°
22
70°
53°
23
71°
53°
24
73°
52°
25
69°
51°
26
70°
52°
27
72°
53°
28
71°
53°
29
68°
51°
30
69°
49°
1
59°
43°
2
57°
39°
3
56°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in River Falls
River Falls's September 2026 forecast shows daily high temperatures ranging from 56° to 81°, with overnight lows between 37° and 60°. The average high for September is 69° 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 River Falls. See also: October | November | December.
