I always take a look at the San Antonio weather forecast before we travel to San Antonio. A rainy day when you were expecting sunshine is a sure way to put a damper on any vacation or weekend getaway!
San Antonio has a mild, temperate climate with an average of about 300 sunshine days per year.
The hot months are July and August, where average temperatures range between 70°F - 95°F and a few days go over 100°F. July and August also have the highest amount of sunshine hours. The wettest months are May and June, with an average monthly rainfall of around 4½ inches. The winters are mild, with average temperatures ranging between 40°F - 62°F.
If you have a choice about the time of the year to go to San Antonio, I'd say September and October are the best. Some of the summer heat is gone, and there is less rainfall than in Spring. We go whenever we can. I just take a look at the weather forecast before we go.
Here's the weather forecast for San Antonio for the next 7 days:
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I hope the weather cooperates with your vacation plans!