S
M
T
W
T
F
S
30
100°
76°
31
100°
79°
1
100°
79°
2
101°
76°
3
101°
81°
4
94°
80°
5
97°
79°
6
99°
78°
7
99°
78°
8
100°
79°
9
99°
79°
10
97°
78°
11
101°
79°
12
100°
79°
13
99°
80°
14
99°
77°
15
98°
75°
16
98°
76°
17
96°
76°
18
95°
73°
19
95°
74°
20
94°
74°
21
94°
72°
22
93°
72°
23
88°
66°
24
84°
71°
25
90°
71°
26
90°
70°
27
86°
70°
28
85°
69°
29
88°
70°
30
88°
70°
1
89°
69°
2
85°
69°
3
84°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in San Antonio Central
San Antonio Central's September 2026 forecast shows daily high temperatures ranging from 84° to 101°, with overnight lows between 66° and 80°. The average high for September is 92° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in San Antonio Central. See also: October | November | December.
