Most tourists visit San Antonio and Austin in summer, though it's not the ideal season. The weather is hot, and restaurants and attractions tend to be crowded. That said, there are plenty of places to cool off around town, and hotel rates are slightly lower (conventioneers come in the fall, winter, and spring). Also consider that some of the most popular outdoor attractions, such as SeaWorld and Six Flags Fiesta Texas, either open only in summer or keep far longer hours in summer.
In fall and spring, temperatures are comfortable for exploring. If there's a large convention in San Antonio, downtown hotels will have high occupancy rates and, consequently, higher prices. Tip: If you have some flexibility, check hotel rates for different weeks or go online to the San Antonio CVB website (www.visitsanantonio.com) and click on "Meeting Professionals," then go to the calendar. By entering dates, you can see the meetings planned for that time period and just how many hotel rooms each meeting is projected to fill. Winter is a slow season for San Antonio hotels, and good deals can be had. December, in particular, is a great time to see San Antonio, if you don't mind running the risk of cold weather . The River Walk is all lit up with lights, and piñatas can be seen everywhere.
San Antonio is the most popular in-state destination for Texans, many of whom come for the weekend. This, too, can raise room rates for hotels on the River Walk, but not necessarily for the pure business hotel, such as those that are downtown, but not on the river, and those just north of downtown, in the vicinity of the airport. Try these options on weekends for discount rates.
Try to avoid coming to Austin in March unless you're planning to come to the SXSW Music Festival. This is the busiest month of the year, and rooms are expensive and hard to come by. Summer season is typically busy, and legislative sessions (the first half of odd-numbered years) and University of Texas events (graduation, say, or home football games) can also fill up the town's lodgings.
From late May through September, expect regular high temperatures and often high humidity.
Fall and spring are prime times to visit; the days are pleasantly warm and, if you come in late March or early April, the wildflowers in the nearby Hill Country will be in glorious bloom. Temperate weather combined with the lively celebrations surrounding Christmas also make November and December good months to visit. Sometimes a "Norther" wind blows in, dropping daytime temperatures to between 40 and 50 degrees Fahrenheit (4°-10°C). January and February can be colder, but not necessarily -- it's a matter of luck.
Banks, government offices, post offices, and many stores, restaurants, and museums are closed on the following legal national holidays: January 1 (New Year's Day), the third Monday in January (Martin Luther King, Jr., Day), the third Monday in February (Presidents' Day), the last Monday in May (Memorial Day), July 4 (Independence Day), the first Monday in September (Labor Day), the second Monday in October (Columbus Day), November 11 (Veterans Day/Armistice Day), the fourth Thursday in November (Thanksgiving Day), and December 25 (Christmas). The Tuesday after the first Monday in November is Election Day, a federal government holiday in presidential-election years (held every 4 years, and next in 2012).
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.