This dynamic creates distinct temperature phases rather than a simple gradual climb or decline. Fall (September–November) September remains warm, often hovering near 90°F (32°C), but October and November deliver a noticeable cooling trend.
San Antonio TX Average Temperatures Daily Range Across the Seasons
Overnight lows move from the 40s°F (4–6°C) early in the year to the 60s°F (15–20°C) by late spring. Summer (June–August) Summer in San Antonio is defined by sustained heat, with average highs consistently in the mid-90s°F (35°C) during June, July, and August.
Heat indices can push perceived temperatures into the triple digits, especially when humidity from the Gulf combines with stagnant high-pressure systems. San Antonio, Texas, experiences a humid subtropical climate that shapes daily life and seasonal rhythms across the region.
San Antonio TX Average Temperatures Daily Range by Month
Snow is infrequent, but icy conditions can disrupt daily life when they do occur. Understanding the average temperatures here helps residents and visitors plan activities, choose appropriate clothing, and manage energy use throughout the year.
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