Will I be hot?
Will I be hot in San Antonio in June?
Verdict
Yes — Yes, hot.
Highs push 93°F — sun exposure and hydration matter more than layering.
Day vs. night
Day
93°F
Sweltering
Plan indoor hours around the peak of the day.
Night
74°F
Warm
Still warm enough for a T-shirt after dark.
Why
San Antonio in June averages highs of 93°F, lows of 74°F, 8 rainy days.
Prioritize breathable fabrics, sun protection, and hydration over any kind of layering piece.