Weather in San Antonio: August
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Average day temperature: | 96.5°F |
| Average night temperature: | 79.8°F | |
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Number of sunny days: | 18 days |
| Day length: | 12.8 - 13.5 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
September
September
| San Antonio |
Air temperature in August, °F
Show year:
2026
2025
2024
The highest day temperature during August of 2026 was 104°F. At the same time the lowest night temperature was 74°F. Daily and nightly averages during August were 99.0°F and 79.1°F.
Sunny, partly cloudy and cloudy days
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in San Antonio in August is 0.4 in. Other months of the year show relatively similar values.
Wind speed in August, mph
The average wind speed value in August is 8.1 mph It makes August 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 August is: 9.4.
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: 18:32
September 17, thursday
2100
84°F
W
14 mph
14 mph
September 18, friday
0000
81°F
NW
9 mph
9 mph
0300
79°F
W
6 mph
6 mph
0600
77°F
W
5 mph
5 mph
0900
79°F
W
7 mph
7 mph
1200
90°F
W
8 mph
8 mph
1500
97°F
NW
7 mph
7 mph
1800
91°F
W
11 mph
11 mph
