Frio County Climate
Frio County, Texas
Avg Annual Temp
71.0°F
Annual Precip
23.9"
Annual Snowfall
0.1"
Extreme Heat Days
139.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Frio County Weather
Scorching South Texas Heat
Frio County is one of the warmest counties in the U.S. with an annual average temperature of 71.0°F. Its climate is classified as subtropical Steppe, characterized by hot, dry periods and intense sun.
Hotter than the Average Texan
The county is significantly hotter than the Texas state average, exceeding it by 5.5 degrees. It is also drier than many parts of the state, with only 23.9 inches of rain compared to the 31.9-inch average.
The Brush Country Heat
Frio County aligns with the hot, semi-arid conditions of the Eagle Ford Shale region. It stays noticeably warmer and drier than the San Antonio area just to its north.
Endless Summer Conditions
A staggering 140 days per year reach temperatures of 90°F or more, the highest in this group. Winters are short and warm, with an average temperature of 55.4°F and negligible snowfall.
Manage the Extreme Heat
Air conditioning is a non-negotiable requirement for the 140 days of extreme heat. Residents should also prioritize sun protection and water conservation given the low 23.9-inch annual rainfall.
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.