S
M
T
W
T
F
S
26
97°
76°
27
100°
75°
28
99°
76°
29
100°
78°
30
102°
77°
31
100°
77°
1
102°
76°
2
101°
80°
3
101°
74°
4
102°
78°
5
100°
78°
6
102°
79°
7
100°
77°
8
99°
75°
9
100°
77°
10
100°
77°
11
102°
78°
12
103°
77°
13
104°
77°
14
100°
77°
15
103°
79°
16
101°
76°
17
103°
77°
18
101°
74°
19
103°
74°
20
103°
77°
21
104°
76°
22
105°
75°
23
105°
57°
24
104°
73°
25
102°
71°
26
103°
76°
27
105°
77°
28
101°
76°
29
99°
75°
30
100°
76°
31
100°
77°
1
100°
79°
2
103°
76°
3
103°
81°
4
94°
79°
5
100°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Antonio
San Antonio's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Antonio. See also: September | October | November.
