S
M
T
W
T
F
S
26
86°
62°
27
90°
65°
28
95°
65°
29
96°
57°
30
88°
61°
31
89°
57°
1
88°
57°
2
87°
58°
3
89°
57°
4
86°
55°
5
87°
56°
6
86°
57°
7
86°
61°
8
90°
59°
9
89°
62°
10
93°
64°
11
94°
57°
12
92°
53°
13
84°
51°
14
81°
52°
15
82°
53°
16
82°
56°
17
83°
56°
18
88°
62°
19
92°
61°
20
92°
63°
21
93°
62°
22
93°
60°
23
92°
59°
24
86°
57°
25
81°
59°
26
81°
59°
27
88°
57°
28
80°
51°
29
82°
49°
30
79°
49°
31
79°
52°
1
80°
52°
2
83°
48°
3
77°
52°
4
80°
56°
5
86°
57°
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 77° to 96°, with overnight lows between 48° and 65°. The average high for August is 87° 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 Fort Smith. See also: September | October | November.
