Duval County Climate
Duval County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
71.9°F
Annual Precip
25.1"
Annual Snowfall
0.0"
Extreme Heat Days
155
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
8,170
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Duval County
Climate Verdict
Duval County has a warm, averaging 71.9°F year-round, moderate rainfall of 25.1 inches per year, extreme heat exposure with 154.9 days per year above 90°F, virtually no measurable snowfall. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are exceptionally mild, with January averaging 55.3°F. summers are hot, with July averaging 85.5°F. The 30°F seasonal variation provides noticeable but manageable change. January is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Duval County is 6.5°F warmer than the Texas statewide average of 65.5°F, it is also noticeably drier, receiving 6.7 inches less precipitation than the state average, the county experiences 50.05812661732419 more extreme heat days than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.