Grainger County Climate
Grainger County, Tennessee
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.9°F
Annual Precip
48.5"
Annual Snowfall
3.0"
Extreme Heat Days
24
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: Grainger County
Climate Verdict
Grainger County has a mild, with an average annual temperature of 55.9°F, moderately wet with 48.5 inches of annual precipitation, occasional hot days — 24.2 per year above 90°F, light snow averaging 3.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 35.9°F. summers are warm — July averages 75.0°F. The 39°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Grainger County closely matches the Tennessee statewide average temperature of 58.0°F, it is also noticeably drier, receiving 7.1 inches less precipitation 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.