S
M
T
W
T
F
S
26
102°
80°
27
101°
79°
28
104°
77°
29
101°
78°
30
99°
77°
31
99°
79°
1
90°
72°
2
93°
70°
3
96°
70°
4
100°
72°
5
103°
75°
6
102°
77°
7
103°
75°
8
100°
73°
9
100°
73°
10
102°
77°
11
102°
76°
12
103°
78°
13
104°
79°
14
104°
77°
15
103°
75°
16
106°
79°
17
100°
78°
18
109°
75°
19
109°
77°
20
106°
77°
21
102°
76°
22
102°
76°
23
97°
74°
24
96°
75°
25
103°
76°
26
95°
76°
27
97°
74°
28
100°
75°
29
101°
79°
30
100°
78°
31
93°
70°
1
98°
72°
2
96°
71°
3
93°
70°
4
94°
73°
5
93°
72°
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 93° to 103°, with overnight lows between 70° and 79°. The average high for August is 97° with an average low of 74°. 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.
