Frost/Freeze Information for Louisville, Kentucky

 

It's important to note that these statistics are for the city of Louisville.  Rural areas may have significantly different statistics, even within Jefferson County.

Records:
Latest spring frost (36°):  May 27, 1961
Latest spring freeze (32°):  May 10, 1966
Latest spring hard freeze (28°):  April 23, 1986
Earliest final spring frost (36°):  March 15, 1884
Earliest final spring freeze (32°):  March 5, 1927
Earliest final spring hard freeze (28°):  February 19, 1905
Earliest fall frost (36°):  September 25, 1950
Earliest fall freeze (32°):  October 3, 1974
Earliest fall hard freeze (28°):  October 10, 1964
Latest first fall frost (36°):  November 23, 1902
Latest first fall freeze (32°):  November 28, 1899 and November 28, 2009
Latest first fall hard freeze (28°):  December 13, 1939
Longest growing season:  257 days in 1884
Shortest growing season:  166 days in 1976

Averages, using the entire period of record:
Last spring frost (36°):  April 18
Last spring freeze (32°):  April 5
Last spring hard freeze (28°):  March 24
First fall frost (36°):  October 20
First fall freeze (32°):  November 1
First fall hard freeze (28°):  November 12

Normals, 1981-2010:
Last spring frost (36°):  April 14
Last spring freeze (32°):  April 3
Last spring hard freeze (28°):  March 23
First fall frost (36°):  October 25
First fall freeze (32°):  November 4
First fall hard freeze (28°):  November 16

 

 first fall 28

first 32

last 28

last 32

 

Areawide Frost/Freeze Information
Below is a series of maps showing average first and last dates for selected temperature thresholds.  Data were taken from about fifty area observing sites.  The data used were from each site's entire period of record (often stretching back into the 19th Century), and thus are averages rather than normals.  Due to the limited number of points for which data are available, there is some "bullseyeing" on the map.  These maps are for general information purposes only.  For more precise information for your exact location, consult the Kentucky Climate Center or the Indiana State Climate Office.

   Last 28 degree temperature in the spring
   Last 32 degree temperature in the spring
   Last 36 degree temperature in the spring
   First 36 degree temperature in the fall
   First 32 degree temperature in the fall
   First 28 degree temperature in the fall

 

Two tables of graphs follow.  The first shows average dates of last spring freeze/hard freeze and first fall freeze/hard freeze.  The y-axis shows how many times that event has occurred during each week given on the x-axis.  For example, the last spring freeze in Louisville has occurred during the week of April 9-15 34 times (since records began in 1871).

The second table shows how these average dates have changed over time.  We broke the historical record down into decades, and found the average date for each decade.  The average for the entire period of record is shown with a red line, for comparison.

Last spring freeze in Louisville Last spring 28 degree temperature in Louisville
First fall freez in Louisville Average date of first 28 degree temperature in Louisville

Average date of last spring freeze in Louisville, decadal Average date of last 28 degree temperature in Louisville, decadal
Average date of first fall freeze in Louisville, decadal Average date of first fall hard freeze in Louisville, decadal


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.