Dallas County Climate
Dallas County, Texas
Avg Annual Temp
66.8°F
Annual Precip
38.8"
Annual Snowfall
1.6"
Extreme Heat Days
104.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.