S
M
T
W
T
F
S
26
87°
64°
27
86°
63°
28
86°
63°
29
83°
62°
30
84°
62°
31
82°
61°
1
83°
62°
2
83°
62°
3
82°
57°
4
82°
58°
5
83°
61°
6
84°
62°
7
83°
61°
8
78°
56°
9
75°
54°
10
77°
56°
11
82°
61°
12
83°
61°
13
82°
60°
14
79°
60°
15
75°
57°
16
75°
56°
17
78°
60°
18
82°
61°
19
83°
61°
20
83°
60°
21
72°
52°
22
74°
52°
23
75°
50°
24
74°
52°
25
75°
50°
26
72°
51°
27
71°
50°
28
72°
52°
29
73°
49°
30
75°
57°
31
77°
58°
1
72°
53°
2
77°
59°
3
81°
57°
4
82°
53°
5
76°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in River Falls
River Falls's August 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 49° and 64°. The average high for August is 79° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in River Falls. See also: September | October | November.