Typical Dates of Last Spring Killing Frost

Color Key to Typical Dates of Last Spring Frost

Zone	Typical Dates*
	April 26 - May 2
	May 3 - 9
	May 10 - 16
	May 17 - 23
	May 24 - 30
	May 30 - June 6

*Please note that zone boundaries are approximate! Also, last spring frost dates can vary greatly from year to year. For more detailed local climate data, refer to the Wisconsin County Home Pages