Austin San Antonio, TX Climate

Climate Insight: Austin San Antonio, TX

An annual average temperature of 70°F, ranging from a mean daily high of 82°F to a mean daily low of 58°F is what the NOAA 1991–2020 climate normals report for Austin San Antonio, Texas. August is typically the warmest month of the year, while January is the coldest. That baseline comes from station USW00012971 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Austin San Antonio sees about 31.3 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 270 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 1 and the first fall freeze near November 26. On the energy side, 1,446 heating degree days and 3,144 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Austin San Antonio scores 92/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.