Starr County Climate
Starr County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
75.5°F
Annual Precip
21.0"
Annual Snowfall
0.1"
Extreme Heat Days
191
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
9,371
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Starr County
Climate Verdict
Starr County has a hot, with an average annual temperature of 75.5°F, semi-arid conditions with only 21.0 inches of annual precipitation, extreme heat exposure with 190.75 days per year above 90°F, light snow averaging 0.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are exceptionally mild, with January averaging 59.0°F. summers are hot, with July averaging 88.3°F. The climate is remarkably stable year-round, with only a 29°F difference between January and July. 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
Starr County is 10.0°F warmer than the Texas statewide average of 65.5°F, it is also noticeably drier, receiving 10.9 inches less precipitation than the state average, the county experiences 85.90812661732419 more extreme heat days than the state average.
Climate Profile
About Starr County Weather
Among the Nation's Hottest Regions
With an annual average temperature of 75.5°F, Starr County is dramatically warmer than the national median of 54°F. This semi-arid climate receives only 21.0 inches of rain, well below the national average for precipitation.
Surpassing the Texas Temperature Average
Starr County averages 75.5°F annually, which is a full 10 degrees higher than the Texas state average of 65.5°F. It ranks as one of the warmest counties in the entire state due to its southern location.
The Scorching Heart of South Texas
The county's 75.5°F average outpaces nearly every other county in this report, including Sutton County at 65.8°F. It remains significantly drier than eastern neighbors, receiving 10 inches less rain than Somervell.
Dominant Heat for Half the Year
Extreme heat is the norm here, with 191 days per year hitting at least 90°F. July is punishing with an average of 88.3°F, while winters remain exceptionally mild at 61.1°F.
Prioritize Sun Protection and Hydration
Residents must plan for extreme heat for over six months of the year, making reliable air conditioning a critical utility. UV protection and high-capacity cooling systems are necessary for the 191 days of 90-degree weather.
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.