Weather in San Antonio, Texas, United States in September
In an average September, San Antonio sees a daily high around 91°F and a low around 70°F, based on 1981–2026 of local climate records.
| Average high | 91°F |
|---|---|
| Typical high range | 83°F to 98°F |
| Average low | 70°F |
| Typical low range | 63°F to 75°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
113°F
2000-09-05
Lowest
70°F
1985-09-30
Low
Highest
81°F
2020-09-01
Lowest
46°F
1985-09-30
Feels-like
Highest
140°F
2023-09-24
Lowest
38°F
1985-09-30
Humidity
Highest
22.8 g/m³
2010-09-08
Lowest
3.8 g/m³
2011-09-06
Wind
Highest
30 mph
1998-09-11
Lowest
4 mph
1990-09-14
Precip
Wettest
9.78 in
2018
Driest
0.44 in
2008
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