Harris County Climate
Harris County, Texas
Avg Annual Temp
70.5°F
Annual Precip
53.6"
Annual Snowfall
0.0"
Extreme Heat Days
107.875
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Harris County Weather
One of the Nation's Warmest Spots
Harris County averages a warm 70.5°F annually, far exceeding the national median temperature. It experiences a humid subtropical climate with 53.6 inches of annual rainfall.
Hotter Than the Texas Average
The county ranks as one of the state's warmer regions, sitting 5 degrees above the Texas average of 65.5°F. It also receives 21 inches more rain than the state average.
The Epicenter of Gulf Heat
Harris is warmer than its neighbor Hardin County despite receiving slightly less rain. Both counties share the intense humidity characteristic of the Upper Texas Coast.
Endless Heat and Snowless Winters
Summers are intense with an average of 84.3°F and 108 days reaching 90°F or higher. Winters are very mild at 55.8°F, and snowfall is essentially non-existent.
Prioritizing Cooling and Flood Prep
High-capacity air conditioning is vital for the 108 days of extreme heat. With 53.6 inches of rain, flood insurance and proper property grading are essential considerations.
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.