Grainger County Climate
Grainger County, Tennessee
Avg Annual Temp
55.9°F
Annual Precip
48.5"
Annual Snowfall
3.0"
Extreme Heat Days
24.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
DryWet❄= snowfall
❄4.1"
❄4.5"
4.6"
4.6"
4.1"
3.8"
5.0"
3.8"
3.3"
2.7"
❄3.4"
❄4.5"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Seasonal Overview
National Comparison
Warmer than 57% of US counties
Wetter than 71% of US counties
More seasonal variation than 30% of US counties
Frequently Asked Questions
What is the average temperature in Grainger County?
The average annual temperature in Grainger County, TN is 55.9°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does Grainger County get?
Grainger County receives an average of 48.5 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in Grainger County?
Yes, Grainger County receives an average of 3.0 inches of snowfall per year according to NOAA climate normals.
How hot does Grainger County get in summer?
The average summer temperature (June-August) in Grainger County is 73.7°F. The county experiences an average of 24.2 days per year above 90°F.
How cold are winters in Grainger County?
The average winter temperature (December-February) in Grainger County is 37.9°F. January, typically the coldest month, averages 35.9°F.
Track your own weather in Grainger County
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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.