Duval County Climate
Duval County, Texas
Avg Annual Temp
71.9°F
Annual Precip
25.1"
Annual Snowfall
0.0"
Extreme Heat Days
154.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Duval County Weather
Subtropical Warmth and Persistent Sun
Duval County is among the warmest in the nation with an annual average temperature of 71.9°F. It is relatively dry, receiving only 25.1 inches of annual precipitation.
Significantly Warmer Than the State Average
At 71.9°F, Duval is 6.4 degrees warmer than the state average of 65.5°F. Its 25.1 inches of rain is about 7 inches below the state average, marking it as a warm, semi-arid zone.
A Warm Hub of South Texas
Duval shares the brush country climate of Jim Wells and McMullen counties. It is characterized by high evaporation rates and more extreme heat days than counties located further north.
Endless Heat and Non-Existent Snow
Residents endure 155 days of extreme heat at or above 90°F each year. Snowfall is recorded at 0.0 inches, and even in January, the average temperature stays a mild 55.3°F.
Prepare for Constant Summer Conditions
With 155 days of extreme heat, air conditioning is a critical utility for nearly half the year. Landscaping should focus on drought-tolerant species that can thrive in 25.1 inches of rain and intense 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.