S
M
T
W
T
F
S
26
87°
68°
27
84°
66°
28
84°
61°
29
78°
59°
30
77°
61°
31
79°
62°
1
82°
66°
2
82°
67°
3
84°
66°
4
84°
65°
5
80°
61°
6
83°
66°
7
85°
65°
8
83°
66°
9
84°
65°
10
77°
61°
11
79°
62°
12
82°
65°
13
83°
64°
14
77°
58°
15
75°
57°
16
76°
57°
17
76°
62°
18
81°
64°
19
81°
61°
20
83°
64°
21
83°
62°
22
76°
59°
23
81°
64°
24
77°
57°
25
80°
62°
26
82°
62°
27
83°
58°
28
80°
55°
29
74°
54°
30
74°
56°
31
75°
61°
1
75°
62°
2
78°
61°
3
75°
53°
4
74°
52°
5
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Southwest
Southwest's August 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 52° and 68°. The average high for August is 80° with an average low of 61°. 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 Southwest. See also: September | October | November.
