S
M
T
W
T
F
S
26
80°
64°
27
81°
64°
28
83°
65°
29
85°
65°
30
81°
64°
31
82°
65°
1
81°
64°
2
80°
65°
3
83°
66°
4
86°
64°
5
81°
64°
6
80°
65°
7
84°
64°
8
79°
58°
9
78°
57°
10
78°
58°
11
79°
63°
12
78°
64°
13
82°
64°
14
82°
65°
15
83°
63°
16
80°
60°
17
79°
55°
18
80°
55°
19
84°
62°
20
85°
63°
21
79°
62°
22
81°
61°
23
85°
62°
24
82°
61°
25
78°
59°
26
77°
55°
27
76°
56°
28
76°
59°
29
77°
58°
30
82°
59°
31
84°
61°
1
83°
60°
2
83°
60°
3
82°
52°
4
76°
51°
5
75°
54°
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 75° to 86°, with overnight lows between 51° and 66°. The average high for August is 81° 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.
