Weather in San Antonio: September
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Average day temperature: | 91.2°F |
| Average night temperature: | 75.6°F | |
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Number of sunny days: | 17 days |
| Day length: | 11.9 - 12.7 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.5 in. | |
| more information | ||
14 days
forecast
forecast
| San Antonio |
weather in
October
October
| San Antonio |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 102°F. At the same time the lowest night temperature was 67°F. Daily and nightly averages during September were 93.3°F and 75.2°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in San Antonio in September is 0.5 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 7.8 mph It makes September one of the least windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 8.9.
Best time for vacation in San Antonio
San Antonio on a weather map
Places in USA:
Name
°F
24 Hours Forecast
San Antonio
Local time: 03:40
June 22, monday
0600
77°F
N
11 mph
11 mph
0900
81°F
N
15 mph
15 mph
1200
88°F
N
17 mph
17 mph
1500
93°F
NW
14 mph
14 mph
1800
91°F
NW
14 mph
14 mph
2100
84°F
NW
16 mph
16 mph
June 23, tuesday
0000
79°F
NW
11 mph
11 mph
0300
77°F
NW
9 mph
9 mph
