S
M
T
W
T
F
S
26
89°
62°
27
91°
61°
28
85°
64°
29
89°
65°
30
91°
66°
31
94°
65°
1
90°
60°
2
87°
60°
3
86°
63°
4
93°
65°
5
94°
65°
6
85°
64°
7
86°
64°
8
85°
60°
9
84°
62°
10
86°
64°
11
90°
63°
12
89°
63°
13
83°
60°
14
85°
63°
15
92°
64°
16
89°
63°
17
91°
64°
18
91°
63°
19
90°
63°
20
84°
62°
21
87°
62°
22
89°
61°
23
89°
62°
24
90°
57°
25
87°
54°
26
81°
50°
27
79°
49°
28
79°
50°
29
80°
54°
30
84°
49°
31
88°
47°
1
78°
45°
2
74°
46°
3
76°
48°
4
77°
54°
5
81°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Smith
Fort Smith's August 2026 forecast shows daily high temperatures ranging from 74° to 94°, with overnight lows between 45° and 66°. The average high for August is 86° with an average low of 59°. 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 Fort Smith. See also: September | October | November.
