411  
NOUS41 KILN 111314  
PNSILN  
INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-  
051>056-060>065-070>074-077>082-088-121315-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE WILMINGTON OH  
914 AM EDT THU OCT 11 2018  
   
..FALL FREEZE CLIMATOLOGY
 
 
WHEN DOES THE FIRST FREEZE OF THE FALL SEASON NORMALLY OCCUR?  
 
A TEMPERATURE OF 32 DEGREES FAHRENHEIT HAS OFFICIALLY BEEN RECORDED  
AS EARLY AS SEPTEMBER 28TH AT CINCINNATI, AND SEPTEMBER 21ST IN  
COLUMBUS AND DAYTON. THE FIRST OCCURRENCE OF 32 DEGREES FAHRENHEIT  
HAS HAPPENED AS LATE AS NOVEMBER 27TH AT CINCINNATI AND  
COLUMBUS, AND NOVEMBER 25TH AT DAYTON.  
 
ELEMENTS SUCH AS TOPOGRAPHY, URBAN AND RURAL SETTING AND THE  
PLACEMENT OF THE RECORDING INSTRUMENT CAN CREATE WIDE VARIATIONS IN  
TEMPERATURES ACROSS AN AREA.  
 
NATIONAL WEATHER SERVICE TEMPERATURES ARE OFFICIALLY TAKEN AT AN  
ELEVATION OF FIVE FEET ABOVE THE GROUND, BUT THE TEMPERATURE AT  
GROUND LEVEL MAY BE COLDER. ON TYPICAL FALL NIGHTS WHEN FROST  
OCCURS, THE TEMPERATURE AT THE FIVE FOOT LEVEL MAY READ 36 DEGREES  
WHILE AT THE GROUND LEVEL IT IS ACTUALLY THE 32 DEGREES NEEDED TO  
FORM FROST.  
 
THE FOLLOWING REFERENCE TABLE WILL GIVE AN IDEA AS TO WHEN THE FIRST  
FREEZING TEMPERATURES MIGHT OCCUR, BASED ON THE LATEST 30 YEARS OF  
CLIMATOLOGICAL DATA AVAILABLE AT EACH OF THE LISTED LOCATIONS (1981-  
2010).  
 
AN UPDATED GRAPHICAL PRESENTATION OF THE CURRENT STATUS OF THE NWS  
WILMINGTON FROST/FREEZE PROGRAM WILL BE AVAILABLE ON OUR WEBSITE AT  
WWW.WEATHER.GOV/ILN/.  
 
LOCATION NORMAL FIRST FIRST 32F IN ONE FIRST 32F IN NINE  
32F IN FALL YEAR OUT OF TEN YEARS OUT OF TEN  
(10% PROBABILITY) (90% LIKELIHOOD)  
 
..SOUTHWEST OHIO  
 
CINCINNATI (KLUK) OCT 22 OCT 7 NOV 4  
DAYTON (KDAY) OCT 22 OCT 7 NOV 6  
HILLSBORO OCT 24 OCT 6 NOV 6  
MILFORD OCT 20 OCT 6 NOV 2  
WILMINGTON OCT 16 OCT 1 NOV 1  
XENIA OCT 20 OCT 4 NOV 5  
 
..CENTRAL OHIO  
 
CIRCLEVILLE OCT 19 OCT 4 NOV 3  
COLUMBUS (KCMH) OCT 27 OCT 10 NOV 9  
DELAWARE OCT 14 SEP 30 NOV 1  
LONDON OCT 9 SEP 28 OCT 26  
MARYSVILLE OCT 22 OCT 7 NOV 5  
NEWARK OCT 12 SEP 30 OCT 28  
WASHINGTON C.H. OCT 21 OCT 7 NOV 4  
 
..WEST CENTRAL OHIO  
 
BELLEFONTAINE OCT 14 OCT 1 OCT 29  
GREENVILLE OCT 12 SEP 30 OCT 29  
KENTON OCT 20 OCT 4 NOV 4  
SPRINGFIELD OCT 13 SEP 30 OCT 29  
 
..SOUTH CENTRAL OHIO  
 
PORTSMOUTH OCT 23 OCT 5 NOV 6  
CHILLICOTHE OCT 17 OCT 3 NOV 2  
 
..KENTUCKY  
 
CARROLLTON OCT 25 OCT 10 NOV 7  
COVINGTON (KCVG) OCT 24 OCT 9 NOV 6  
MAYSVILLE OCT 25 OCT 10 NOV 8  
WARSAW OCT 21 OCT 5 NOV 4  
WILLIAMSTOWN OCT 26 OCT 8 NOV 10  
 
..INDIANA  
 
RICHMOND OCT 16 OCT 2 OCT 30  
VEVAY OCT 26 OCT 10 NOV 9  
 

 
 
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