S
M
T
W
T
F
S
26
100°
78°
27
100°
78°
28
99°
77°
29
99°
77°
30
100°
78°
31
100°
77°
1
98°
76°
2
97°
76°
3
97°
77°
4
98°
77°
5
98°
76°
6
97°
77°
7
98°
76°
8
98°
76°
9
97°
75°
10
97°
76°
11
96°
76°
12
97°
75°
13
96°
74°
14
97°
71°
15
98°
73°
16
98°
74°
17
96°
75°
18
97°
74°
19
96°
68°
20
91°
67°
21
88°
65°
22
89°
66°
23
90°
66°
24
91°
68°
25
96°
67°
26
95°
67°
27
96°
68°
28
97°
72°
29
96°
72°
30
96°
71°
31
95°
70°
1
94°
68°
2
94°
64°
3
88°
65°
4
90°
70°
5
93°
70°
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 88° to 100°, with overnight lows between 64° and 78°. The average high for August is 96° with an average low of 72°. 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.
