Fall Freeze Dates



When does the first freeze of the season normally occur in your 
part of Ohio?
The following reference table will give an idea as to when the 
first freezing temperatures might occur, based on several years
of climatological data, at each of the listed locations.
In the table that follows there are three columns which give the 
average date when the temperature first reaches 32 degrees in the
fall, the date on which chances are one in ten that a freeze 
will have occurred, and the date when the chances are nine in 
ten that a freeze will have occurred.
location       ave date 1st   32f in one year   32f in nine years
                 fall 32f        out of ten         out of ten
bowling green      oct 13          sep 29             oct 27
defiance           oct 9           sep 24             oct 23
findlay            oct 14          sep 30             oct 28
lima               oct 10          sep 24             oct 26
montpelier         oct 6           sep 20             oct 22
toledo             oct 12          sep 25             oct 28
bucyrus            oct 8           sep 22             oct 24
elyria             oct 18          oct 5              oct 31
norwalk            oct 13          sep 28             oct 27
oberlin            oct 8           sep 22             oct 24
put-in-bay         nov 4           oct 21             nov 18
sandusky           oct 27          oct 24             nov 10
tiffin             oct 16          oct 2              oct 31
ashtabula          oct 25          oct 8              nov 12
chardon            oct 14          sep 24             nov 2
cleveland          oct 29          oct 13             nov 14
hiram              oct 18          oct 1              nov 4
painesville        oct 31          oct 18             nov 14
warren             oct 5           sep 24             oct 16
youngstown arpt    oct 14          sep 29             oct 28
bellefontaine      oct 11          sep 26             oct 25
greenville         oct 4           sep 23             oct 15
kenton             oct 7           sep 21             oct 23
sidney             oct 8           sep 23             oct 24
springfield        oct 21          oct 7              nov 3
urbana             oct 6           sep 17             oct 24

circleville        oct 11          sep 28             oct 25
columbus           oct 17          oct 2              nov 2
delaware           oct 6           sep 25             oct 18
lancaster          oct 6           sep 24             oct 18
london             oct 7           sep 25             oct 10
marion             oct 9           sep 21             oct 26
marysville         oct 9           sep 25             oct 24
newark             oct 8           sep 23             oct 23
washington c.h.    oct 19          oct 5              oct 31
ashland            oct 11          sep 30             oct 23
coshocton          oct 8           sep 26             oct 21
fredericktown      sep 30          sep 16             oct 14
mansfield          oct 17          oct 4              oct 30
millersburg        oct 7           sep 24             oct 20
plymouth           oct 10          sep 24             oct 25
wooster            oct 6           sep 24             oct 17
akron-canton arpt  oct 18          oct 2              nov 4 
cadiz              oct 15          oct 3              oct 26
canfield           oct 1           sep 19             oct 13
steubenville       oct 21          oct 7              nov 3
cincinnati         oct 27          oct 12             nov 12
dayton             oct 20          oct 5              nov 4
hamilton-fairfield oct 11          sep 28             oct 24
hillsboro          oct 20          oct 5              nov 4
milford            oct 11          sep 27             oct 24
wilmington         oct 12          sep 28             oct 24
xenia              oct 13          sep 30             oct 25
chillicothe        oct 15          oct 1              oct 29
gallipolis         oct 10          sep 29             oct 22
ironton            oct 23          oct 9              nov 5 
jackson            oct 2           sep 18             oct 16
portsmouth         oct 24          oct 10             nov 6 
waverly            oct 8           sep 28             oct 19
athens             oct 1           sep 19             oct 13
barnesville        oct 3           sep 22             oct 14
caldwell           oct 7           sep 22             oct 22
cambridge          oct 4           sep 22             oct 16
marietta           oct 14          oct 4              oct 24
mcconnelsville     oct 11          sep 29             oct 24
new lexington      oct 4           sep 21             oct 16
zanesville         oct 6           sep 23             oct 18
While the table above concerns itself only with the first 
recorded freezing temperature in fall, we must add that frost 
can occur any time national weather service temperatures of 36 
degrees or less are recorded.  The reason for this apparent 
anomaly is that official temperature readings are taken at an 
elevation of five feet above 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 the temperature at 
ground level is actually the 32 degrees needed to form frost.
Note: The above data are based on climate normals prior to the most 
recent 1981-2010 Climate Normals publication.  The National Climate Data
Center will be releasing the 1981-2010 frost/freeze normals
data set shortly.  When that is published, then this page will 
be updated. Thank you for your patience. (9/21/12)