Atascosa County Climate
Atascosa County, Texas
Avg Annual Temp
71.0°F
Annual Precip
28.5"
Annual Snowfall
0.1"
Extreme Heat Days
140.86666666666665
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Atascosa County Weather
Intense heat in the South Texas brush
Atascosa County is exceptionally warm with an annual average of 71.0°F, far exceeding the national median. It stays slightly drier than the national average with 28.5 inches of annual precipitation.
Hotter and drier than the state average
The county's 71.0°F average temperature is 5.5 degrees higher than the Texas state average. It receives 28.5 inches of rain, which is about 3.4 inches less than the statewide typical of 31.9 inches.
Leading the region in extreme heat
Atascosa County endures a staggering 141 days above 90°F, making it one of the hottest areas in its regional peer group. The July average of 85.4°F highlights the persistent heat that defines this South Texas landscape.
Persistent heat with almost no winter
Summer dominates the calendar with 141 extreme heat days and an 84.9°F summer average. Winter is very mild, with a January average of 53.8°F and a nearly non-existent 0.1 inches of snow.
Focus on extreme heat survival
Robust air conditioning is a necessity, as the county faces 141 days of temperatures over 90°F. Residents should practice water conservation given the lower-than-average rainfall of 28.5 inches and high evaporation rates.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.