Union County Climate

Name: Union County Climate Normals
Creator: NOAA National Centers for Environmental Information
License: https://www.usa.gov/government-works

Union County, Kentucky

NOAA NCEI 1991-2020 Climate Normals

Avg Annual Temp

54.8°F

Annual Precip

50.9"

Annual Snowfall

3.3"

Extreme Heat Days

days >= 90°F/yr

Monthly Temperature

Precipitation Calendar

Dry

Wet❄= snowfall

❄3.9"

❄3.7"

❄5.1"

5.1"

5.3"

4.6"

4.4"

3.2"

❄3.6"

4.2"

❄4.4"

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Growing Season & Gardening

USDA Hardiness Zone

Minimum winter temperature range for plant survival

Seasonal Overview

National Comparison

Warmer than 50% of US counties

Wetter than 78% of US counties

More seasonal variation than 55% of US counties

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 54.8°F, moderately wet with 50.9 inches of annual precipitation, occasional hot days — 30.9 per year above 90°F, light snow averaging 3.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.

Seasonal Breakdown

Winters are cold, with January averaging 31.8°F. summers are warm — July averages 75.8°F. The 44°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 closely matches the Kentucky statewide average temperature of 56.0°F.

Frequently Asked Questions

What is the average temperature in Union County?

The average annual temperature in Union County, KY is 54.8°F, based on NOAA 30-year climate normals (1991-2020).

How much rain does Union County get?

Union County receives an average of 50.9 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 3.3 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 74.2°F. The county experiences an average of 31 days per year above 90°F.

How cold are winters in Union County?

The average winter temperature (December-February) in Union County is 34.4°F. January, typically the coldest month, averages 31.8°F.

Track your own weather in Union County

Ambient Weather personal weather stations give you hyperlocal climate data.

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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.

By Evan Brooks, Data EditorUpdated May 14, 2026Reviewed by Evan Brooks, Data Editor

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