S
M
T
W
T
F
S
26
63°
49°
27
63°
41°
28
79°
50°
29
66°
58°
30
75°
55°
31
78°
49°
1
76°
57°
2
63°
55°
3
70°
46°
4
74°
45°
5
59°
52°
6
67°
52°
7
66°
52°
8
70°
52°
9
71°
51°
10
75°
49°
11
67°
47°
12
67°
48°
13
75°
44°
14
76°
44°
15
76°
51°
16
65°
44°
17
69°
35°
18
77°
54°
19
75°
57°
20
67°
46°
21
78°
38°
22
84°
51°
23
80°
56°
24
74°
45°
25
70°
49°
26
81°
53°
27
86°
58°
28
74°
52°
29
54°
48°
30
70°
50°
31
63°
53°
1
78°
51°
2
82°
60°
3
77°
61°
4
61°
44°
5
61°
36°
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 ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
