S
M
T
W
T
F
S
26
106°
84°
27
111°
83°
28
111°
84°
29
106°
83°
30
108°
84°
31
107°
78°
1
106°
78°
2
104°
77°
3
105°
79°
4
104°
78°
5
105°
79°
6
105°
80°
7
106°
81°
8
107°
82°
9
108°
82°
10
109°
81°
11
109°
80°
12
108°
77°
13
106°
77°
14
103°
76°
15
103°
76°
16
104°
77°
17
103°
78°
18
104°
83°
19
107°
84°
20
108°
85°
21
109°
84°
22
108°
82°
23
107°
80°
24
108°
78°
25
106°
77°
26
104°
76°
27
102°
75°
28
102°
75°
29
101°
76°
30
102°
76°
31
103°
81°
1
105°
82°
2
107°
81°
3
106°
81°
4
107°
80°
5
107°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Luis
San Luis's August 2026 forecast shows daily high temperatures ranging from 101° to 111°, with overnight lows between 75° and 85°. The average high for August is 106° with an average low of 80°. 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 San Luis. See also: September | October | November.
