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
98°
77°
11
101°
78°
12
101°
79°
13
101°
80°
14
101°
79°
15
101°
80°
16
99°
78°
17
97°
77°
18
85°
76°
19
92°
75°
20
95°
75°
21
98°
77°
22
98°
76°
23
97°
76°
24
97°
75°
25
97°
74°
26
96°
74°
27
97°
74°
28
97°
77°
29
95°
75°
30
91°
66°
1
87°
65°
2
86°
66°
3
89°
66°
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 86° to 97°, with overnight lows between 65° and 77°. The average high for September is 93° with an average low of 71°. 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.
