Packing List
September Packing List for San Antonio — What to Wear & Bring
September remains hot in San Antonio with highs of 91°F. Pack summer-weight clothing but bring a light layer for 70°F evenings and be ready for 7 days of potential rain.
Averages 70–91°F, ~7 days of rain
San Antonio is still very warm in September with highs of 91°F; breathable natural fibers are best.
Comfortable for navigating the San Antonio River Walk during a humid 91°F afternoon.
Useful for the transition to 70°F evenings or for heavily air-conditioned San Antonio indoor spaces.
A versatile option for San Antonio's resort-casual dining scene during 91°F September days.
Essential for exploring the historic sites of San Antonio in the 91°F September heat.
Perfect for a 70°F evening dinner in San Antonio's vibrant Pearl District.
A good choice for the 7 days of rain when San Antonio sidewalks might be damp.
The Texas sun remains strong in September; protect your eyes during a 91°F day in San Antonio.
Provides shade while visiting San Antonio's outdoor missions in the 91°F sun.
Handy for the 7 days of rain that San Antonio typically receives in September.
Hydration is still key in San Antonio's 91°F heat, especially if you're walking the River Walk.
Helps keep you cool during outdoor events in San Antonio when it's 91°F and humid.
San Antonio's September averages 7 rainy days as fall storm patterns return with 91°F highs — a compact umbrella protects against sudden afternoon downpours on the River Walk and Pearl District outdoor patios.
Local tips for San Antonio in September
- 1.September is a great time to visit the San Antonio Zoo as the crowds thin out, but it's still 91°F.
- 2.Enjoy the outdoor markets in Southtown, but go early or late to avoid the peak 91°F heat.
- 3.Check the forecast for 'cool fronts' that might briefly bring temperatures below 91°F in late September.