Harris County Climate
Harris County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
70.5°F
Annual Precip
53.6"
Annual Snowfall
0.0"
Extreme Heat Days
108
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
7,662
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Harris County
Climate Verdict
Harris County has a warm, averaging 70.5°F year-round, moderately wet with 53.6 inches of annual precipitation, significant summer heat with 107.875 days annually above 90°F, light snow averaging 0.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 53.8°F. summers are hot, with July averaging 84.8°F. The 31°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
Harris County is 5.0°F warmer than the Texas statewide average of 65.5°F, it is also noticeably wetter, receiving 21.7 inches more precipitation than the state average.
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 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.