Union County Climate
Union County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
54.2°F
Annual Precip
54.7"
Annual Snowfall
7.9"
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Union County
Climate Verdict
Union County has a mild, with an average annual temperature of 54.2°F, moderately wet with 54.7 inches of annual precipitation, rare extreme heat with only 18.5 days above 90°F annually, light snow averaging 7.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 33.3°F. summers are warm — July averages 74.0°F. The 41°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Union County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Union County is 3.8°F cooler than the Tennessee statewide average of 58.0°F, the county experiences 17.95992831541217 fewer extreme heat days than the state average.
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.