Overnight lows move from the 40s°F (4–6°C) early in the year to the 60s°F (15–20°C) by late spring. This overview breaks down the data into practical insights without sacrificing scientific accuracy.
San Antonio TX Average Temperatures Monthly Breakdown
These values are based on long-term climate records and serve as a reliable reference for planning purposes. This season often brings the highest variability, as cold fronts can collide with advancing warm air, producing sharp temperature changes in a single week.
Average highs drop into the 70s and then the 60s°F (21–27°C), while overnight lows slide from the 60s early in fall to the 40s and 50s°F (4–12°C) by late November. Average highs in January typically reach the mid-60s°F (18°C), with overnight lows averaging just above freezing in the northern suburbs and low 40s°F (5–7°C) within the city core.
San Antonio TX Average Temperatures Monthly Breakdown
Understanding the average temperatures here helps residents and visitors plan activities, choose appropriate clothing, and manage energy use throughout the year. Seasonal Breakdown by Temperature Spring (March–May) March begins with average highs in the upper 60s°F (around 20°C), rising steadily to the mid-80s°F (29–30°C) by May.
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