Weather in San Antonio: September
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Average day temperature: | 91.7°F |
| Average night temperature: | 75.9°F | |
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Number of sunny days: | 16 days |
| Day length: | 11.9 - 12.7 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.4 in. | |
| more information | ||
14 days
forecast
forecast
| San Antonio |
weather in
October
October
| San Antonio |
Air temperature in September, °F
Show year:
2026
2025
2024
The highest day temperature during September of 2026 was 102°F. At the same time the lowest night temperature was 73°F. Daily and nightly averages during September were 94.4°F and 77.8°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 0.4 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 lest windy month 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: 8.6.
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: 11:30
October 29, thursday
1200
70°F
W
8 mph
8 mph
1500
77°F
W
9 mph
9 mph
1800
73°F
SW
7 mph
7 mph
2100
73°F
NW
9 mph
9 mph
October 30, friday
0000
72°F
NW
9 mph
9 mph
0300
68°F
W
8 mph
8 mph
0600
68°F
W
5 mph
5 mph
0900
68°F
W
7 mph
7 mph
