Union County Climate
Union County, Tennessee
Avg Annual Temp
54.2°F
Annual Precip
54.7"
Annual Snowfall
7.9"
Extreme Heat Days
18.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
DryWet❄= snowfall
❄4.7"
❄5.1"
❄5.3"
❄5.3"
4.2"
5.0"
5.2"
3.8"
3.8"
❄3.1"
❄3.8"
❄5.3"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Seasonal Overview
National Comparison
Warmer than 50% of US counties
Wetter than 87% of US counties
More seasonal variation than 38% of US counties
Frequently Asked Questions
What is the average temperature in Union County?
The average annual temperature in Union County, TN is 54.2°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does Union County get?
Union County receives an average of 54.7 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 Union County?
Yes, Union County receives an average of 7.9 inches of snowfall per year according to NOAA climate normals.
How hot does Union County get in summer?
The average summer temperature (June-August) in Union County is 72.4°F. The county experiences an average of 18.5 days per year above 90°F.
How cold are winters in Union County?
The average winter temperature (December-February) in Union County is 35.6°F. January, typically the coldest month, averages 33.3°F.
Track your own weather in Union 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.