S
M
T
W
T
F
S
26
94°
66°
27
92°
64°
28
88°
62°
29
87°
62°
30
90°
61°
31
84°
59°
1
83°
58°
2
82°
60°
3
82°
61°
4
81°
57°
5
78°
61°
6
83°
62°
7
81°
61°
8
83°
61°
9
81°
60°
10
80°
61°
11
80°
61°
12
75°
58°
13
78°
61°
14
77°
60°
15
75°
60°
16
77°
59°
17
79°
60°
18
79°
59°
19
82°
60°
20
83°
61°
21
83°
62°
22
82°
63°
23
84°
62°
24
84°
61°
25
82°
61°
26
83°
60°
27
81°
60°
28
81°
59°
29
82°
61°
30
83°
60°
31
81°
59°
1
71°
58°
2
73°
57°
3
73°
57°
4
79°
49°
5
75°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Thief River Falls
Thief River Falls's August 2026 forecast shows daily high temperatures ranging from 71° to 94°, with overnight lows between 48° and 66°. The average high for August is 81° with an average low of 60°. 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 Thief River Falls. See also: September | October | November.
