Dimmit County Climate
Dimmit County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
70.6°F
Annual Precip
19.6"
Annual Snowfall
0.1"
Extreme Heat Days
153
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
7,759
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dimmit County
Climate Verdict
Dimmit County has a warm, averaging 70.6°F year-round, semi-arid conditions with only 19.6 inches of annual precipitation, extreme heat exposure with 152.9 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 mild, with January temperatures averaging 52.0°F. summers are hot, with July averaging 86.1°F. The 34°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
Dimmit County is 5.1°F warmer than the Texas statewide average of 65.5°F, it is also noticeably drier, receiving 12.3 inches less precipitation than the state average, the county experiences 48.05812661732419 more extreme heat days than the state average.
Climate Profile
About Dimmit County Weather
Intense Heat in the Rio Grande Plain
Dimmit County is exceptionally hot compared to the national median, with an annual average temperature of 70.6°F. It is a dry region, receiving only 19.6 inches of precipitation annually.
Far Hotter and Drier Than Texas Averages
Dimmit sits 5.1 degrees above the Texas average temperature and receives about 12 inches less rain than the state norm. This makes it one of the more extreme environments in the state for heat and aridity.
A Core Piece of the Winter Garden Region
Similar to its neighbor Webb County, Dimmit faces grueling summer heat. It is notably drier than counties to its east, relying more on irrigation for its famous agricultural output.
Five Months of Extreme Summer Heat
The county experiences a staggering 153 days of temperatures at or above 90°F annually. Winters are very brief and mild, with a January average of 52.0°F and practically no snowfall.
Invest in High-Performance Summer Gear
With 153 days of extreme heat, residents must prioritize heavy-duty HVAC maintenance and sun protection. Water storage and efficient irrigation are vital given the low 19.6-inch annual rainfall.
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.