Zapata County Climate
Zapata County, Texas
Avg Annual Temp
74.4°F
Annual Precip
20.4"
Annual Snowfall
0.1"
Extreme Heat Days
171.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Zapata County Weather
Extreme southern heat and sun
Zapata County is one of the warmest places in the U.S., with a 74.4°F annual average temperature. This semi-arid climate receives only 20.4 inches of rain, making it both hot and dry.
Far exceeding the Texas average
At nearly 75°F, Zapata is roughly nine degrees warmer than the Texas state average. It faces a staggering 172 days of extreme heat each year, nearly double the count of northern counties.
The heart of the Rio Grande
Zapata is much hotter and drier than the state average of 65.5°F and 31.9 inches of rain. Its climate closely mirrors the intense heat found in neighboring Webb and Starr counties.
Endless summer and mild winters
Summer lasts most of the year, with a July average of 87.4°F and virtually no snow. Even in January, the average temperature remains a balmy 57.4°F.
Prioritize extreme heat safety
Residents must plan for 172 days of temperatures over 90°F with high-efficiency cooling and hydration. Protective sun gear and tinted windows are essential for the intense South Texas sun.
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.