S
M
T
W
T
F
S
26
71°
52°
27
74°
53°
28
77°
54°
29
66°
49°
30
72°
53°
31
76°
54°
1
78°
55°
2
75°
55°
3
73°
49°
4
73°
53°
5
74°
54°
6
72°
50°
7
76°
54°
8
76°
54°
9
75°
53°
10
74°
54°
11
75°
54°
12
69°
53°
13
73°
53°
14
75°
54°
15
74°
54°
16
74°
53°
17
71°
53°
18
65°
52°
19
72°
52°
20
74°
53°
21
75°
53°
22
74°
52°
23
73°
51°
24
71°
51°
25
72°
50°
26
72°
52°
27
73°
52°
28
72°
51°
29
71°
46°
30
58°
41°
31
57°
41°
1
68°
48°
2
69°
49°
3
68°
48°
4
68°
46°
5
66°
48°
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 57° to 78°, with overnight lows between 41° and 55°. The average high for August is 72° with an average low of 51°. 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.
