Dallas County Climate
Dallas County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
66.8°F
Annual Precip
38.8"
Annual Snowfall
1.6"
Extreme Heat Days
105
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
6,660
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dallas County
Climate Verdict
Dallas County has a warm, averaging 66.8°F year-round, moderate rainfall of 38.8 inches per year, significant summer heat with 104.55 days annually above 90°F, light snow averaging 1.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 46.8°F. summers are hot, with July averaging 85.7°F. The 39°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
Dallas County closely matches the Texas statewide average temperature of 65.5°F, it is also noticeably wetter, receiving 6.9 inches more precipitation than the state average.
Climate Profile
About Dallas County Weather
A Hot Urban Core
Dallas County averages 66.8°F annually, making it one of the warmer urban centers in the United States. It sits roughly 12 degrees above the national median temperature.
Warmer than the Texas Average
At 66.8°F, Dallas is warmer than the Texas state average of 65.5°F. Its urban heat island effect contributes to these higher regional temperatures.
The Wettest County in the Group
It is the wettest county in this group, receiving 38.8 inches of rain annually. This is more than triple the precipitation of Culberson or Crane counties.
Intense Summer Heat and Humidity
Summer is dominated by 105 days of extreme heat and a July average of 85.7°F. Winters are mild with only 1.6 inches of snow and a December-February average of 48.8°F.
Invest in High-Efficiency Cooling
High-efficiency air conditioning is non-negotiable for the 105 days of triple-digit potential. Rain gutters and drainage systems must be maintained to handle the heavy 38.8-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.