04-25-2008, 02:17 PM
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Join Date: Dec 2007
Location: 40N
Posts: 808
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When are the average first and last frost in the U.S. and Canada
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Originally Posted by overgrow.com
Contributed by: MarvinM92
These 2 charts are the average first and last frost in the U.S. & Canada... A frost is when the outside temperature is 32*F or below... Chances of a frost after the spring date and before the fall date are about 50%... Since it is an average, dates will vary from year to year...
Average First and Last Frost in the U.S.
 Average First and Last Frost in Canada
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