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| Fall Frost/Freeze Information |
Graphic Updated: Tue 04/09/2013
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When does the first freeze of the fall season normally occur?
A temperature of 32°F or colder has officially been recorded as early as September 28th at Cincinnati and
September 21st at both Columus and Dayton. However, elements such as topography, urban vs. rural setting, and
siting of a recording instrument can create wide variations in temperatures across a given area.
National Weather Service temperatures are officially recorded at an elevation of 5 feet above the ground, but
the temperature at ground level may be colder. On typical fall nights when frost occurs, the temperature at
the 5-foot level may read 36°, while at ground level it may actually be 32° and cold enough for
frost to develop.
The following reference table will give an idea as to when the first freezing temperatures might occur in
the fall, based on the latest 30 years of climatological data available at each of the listed locations. A
graphical depiction of the average first freeze date and the end dates for fall frost/freeze
headlines also appears below.
LOCATION AVG DATE 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 OCT 23 OCT 9 NOV 6
DAYTON OCT 19 OCT 3 NOV 4
HILLSBORO OCT 24 OCT 7 NOV 9
MILFORD OCT 13 SEP 28 OCT 29
WILMINGTON OCT 13 SEP 28 OCT 27
XENIA OCT 11 SEP 26 OCT 27
..CENTRAL OHIO
CIRCLEVILLE OCT 19 OCT 2 NOV 4
COLUMBUS OCT 20 OCT 6 NOV 3
DELAWARE OCT 9 SEP 27 OCT 22
LONDON OCT 8 SEP 25 OCT 21
MARYSVILLE OCT 16 SEP 28 NOV 3
NEWARK OCT 11 SEP 27 OCT 26
WASHINGTON C.H. OCT 19 OCT 4 NOV 3
..WEST CENTRAL OHIO
BELLEFONTAINE OCT 11 SEP 27 OCT 25
GREENVILLE OCT 8 SEP 25 OCT 22
KENTON OCT 13 SEP 26 OCT 30
SPRINGFIELD OCT 10 SEP 29 OCT 20
URBANA OCT 11 SEP 25 OCT 28
..SOUTH CENTRAL OHIO
PORTSMOUTH OCT 17 SEP 28 NOV 4
WAVERLY OCT 9 SEP 25 NOV 9
..KENTUCKY
CARROLLTON OCT 20 OCT 8 NOV 1
COVINGTON OCT 17 OCT 5 OCT 30
MAYSVILLE OCT 20 OCT 7 NOV 3
WARSAW OCT 17 OCT 3 OCT 30
WILLIAMSTOWN OCT 21 OCT 6 NOV 4
..INDIANA
RICHMOND OCT 12 SEP 29 OCT 24
VEVAY OCT 24 OCT 9 NOV 8
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www.nws.noaa.gov
