S
M
T
W
T
F
S
26
86°
69°
27
87°
70°
28
86°
70°
29
86°
69°
30
87°
71°
31
87°
73°
1
88°
72°
2
90°
73°
3
91°
73°
4
92°
72°
5
91°
73°
6
91°
73°
7
90°
72°
8
90°
73°
9
87°
72°
10
86°
70°
11
86°
68°
12
88°
72°
13
91°
72°
14
91°
71°
15
90°
72°
16
89°
71°
17
91°
72°
18
92°
70°
19
92°
71°
20
90°
69°
21
91°
71°
22
90°
70°
23
90°
71°
24
89°
70°
25
88°
66°
26
86°
67°
27
86°
65°
28
84°
65°
29
85°
66°
30
85°
65°
31
86°
65°
1
85°
66°
2
85°
64°
3
86°
68°
4
88°
66°
5
88°
68°
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 84° to 92°, with overnight lows between 64° and 73°. The average high for August is 88° with an average low of 70°. 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.
