Harrison County Climate
Harrison County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
64.4°F
Annual Precip
51.0"
Annual Snowfall
1.0"
Extreme Heat Days
89
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,929
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Harrison County
Climate Verdict
Harrison County has a warm, averaging 64.4°F year-round, moderately wet with 51.0 inches of annual precipitation, significant summer heat with 88.69999999999999 days annually above 90°F, light snow averaging 1.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 45.2°F. summers are hot, with July averaging 82.5°F. The 37°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Harrison County closely matches the Texas statewide average temperature of 65.5°F, it is also noticeably wetter, receiving 19.1 inches more precipitation than the state average, the county experiences 16.141873382675826 fewer extreme heat days than the state average.
Climate Profile
About Harrison County Weather
Humid Piney Woods Climate
Harrison County's 64.4°F average temperature sits above the national median. It receives 51.0 inches of rain annually, characterizing the lush East Texas landscape.
Close to the State Temperature Average
The county nearly matches the Texas average temperature of 65.5°F. However, it is much wetter than the state norm, receiving 19 inches more rain than the average.
Wetter Than Northern Neighbors
Harrison is significantly wetter than Haskell County to the west. It shares a similar humid profile with Henderson County but receives slightly more annual precipitation.
Rainy Summers and Cool Winters
Summers average 81.4°F with 89 days of extreme heat. The county sees a proper winter cooling to 47.1°F and averages one inch of snow annually.
Prepped for Rain and Sun
Prepare for 89 days of temperatures over 90°F with efficient home cooling. Clear gutters regularly to manage the high 51.0-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.