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
