S
M
T
W
T
F
S
26
87°
79°
27
86°
79°
28
85°
78°
29
85°
79°
30
86°
77°
31
85°
77°
1
85°
79°
2
87°
78°
3
88°
77°
4
88°
78°
5
87°
78°
6
87°
77°
7
88°
77°
8
88°
75°
9
89°
78°
10
88°
79°
11
89°
79°
12
88°
78°
13
88°
79°
14
89°
78°
15
88°
77°
16
89°
78°
17
88°
79°
18
89°
78°
19
88°
78°
20
88°
77°
21
86°
78°
22
88°
78°
23
88°
77°
24
89°
78°
25
88°
79°
26
88°
77°
27
89°
78°
28
89°
79°
29
88°
79°
30
89°
78°
31
88°
77°
1
88°
78°
2
87°
79°
3
89°
79°
4
89°
78°
5
90°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Isidro
San Isidro's August 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 75° and 79°. The average high for August is 88° with an average low of 78°. 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 Isidro. See also: September | October | November.
