March - May
Once spring arrives, San Antonio becomes a very busy place. Students on Spring Break descend on the city in March. In April, the Alamo City welcomes up to 3.5 million attendees to Fiesta (think Mardi Gras with a Tex-Mex flair). May can also be a rainy month, averaging a little over 3 inches, but the crowds still come for Cinco de Mayo and the Valero Texas Open. Despite temperatures that average in the low- to mid-90s max, June and July are popular months for families, who keep cool at San Antonio’s numerous water parks—Six Flags Fiesta Texas, SeaWorld, the newly-opened Morgan’s Wonderland, and Splashtown—as well as Schlitterbahn in nearby New Braunfels.
January, February, August, and September
These are the months when you can visit San Antonio and, for the most part, avoid the crowds and lines at restaurants and attractions. Just remember to prepare for the weather. In addition to December, January and February are the coolest months of the year with temps ranging anywhere from the low-40s to the low-60s. Temps are still high in August and September—averaging a high in the mid-90s in August—but cooling off a few degrees in September, thanks to the rain (an average of 3.71 inches).
Events are held year-round, but October is one of the busiest months for conventions and corporate gatherings. Because the Henry B. Gonzalez Convention Center is located downtown, you’ll find increased traffic along the River Walk and surrounding areas. Cooler temps (ranging from an average low of 59 to an average high of 81 degrees) make this a desirable time to visit San Antonio. The same holds true for November and December when the city sees an influx of holiday travelers. The regular NBA basketball season runs from late October through April and it’s a great time for fans of the four-time champion Spurs to catch a home game at the AT&T Center.