San Antonio, Texas Weather in September

September still feels like summer

San Antonio's September days stay hot, though they're not as fierce as August. You'll likely notice sticky afternoons, and rain falls on some days, so plan for both. The cooler evenings are the easiest part of the day, and they're perfect for a meal along the River Walk or a stroll through the Pearl.

Downtown sights like the Alamo work best when you can slip inside between visits. Save outdoor time for later in the day, and don't count on long walks along the Mission Reach feeling pleasant in the afternoon. If a shower rolls in, having an indoor stop in mind will keep your plans on track.

Holidays and local events

Labor Day brings a long weekend for many Americans, so downtown and the most popular attractions may feel busier then. September 16 is Mexican Independence Day, and San Antonio marks it with celebrations around the city. Look for local events, but don't expect Fiesta. The city's major Fiesta celebration takes place in spring.

If you prefer quieter museum visits, the days after Labor Day are often easier than the holiday weekend itself.

Crowds, prices and a local tip

September falls outside San Antonio's best-weather stretch, which runs from November to April. Even so, it's generally less crowded than the popular spring season, and you may find better hotel deals than you would during Fiesta or spring break. The trade-off is heat and a chance of rain. October is a step cooler, though it's still not part of the best stretch.

For a practical River Walk tip, use the downtown stairways to reach street level when the air feels heavy. The walkways sit below the streets, so popping up near the Alamo can give you a quick route to air-conditioned indoor sights. Just don't try to cover every outdoor attraction in one hot afternoon.