Frost Dates for Various Sites in Wisconsin
Years data taken:  1961 to 1990

 

 

Location

Date of Last Spring Occurrence

Date of First Fall Occurence

Median

Early

90%

10%

Late

Median

Early

90%

10%

Late

Colored line

Antigo

5/06

4/08

4/17

5/23

5/29

10/06

9/20

9/24

10/17

10/17

Appleton

5/02

4/10

4/21

5/10

5/11

10/10

9/21

9/29

10/31

11/03

Ashland

6/03

5/10

5/17

6/23

6/26

9/21

8/21

9/08

10/06

10/08

Beloit

4/27

4/05

4/16

5/12

6/18

10/08

9/22

9/26

11/02

11/14

Blair

5/18

4/23

5/04

6/01

6/11

9/23

9/03

9/08

10/03

10/10

Chilton

5/10

4/17

4/27

5/26

5/29

10/05

9/20

9/23

10/16

10/31

Crivitz

5/26

4/23

5/08

6/04

6/17

9/20

8/29

9/03

10/16

10/11

Eau Claire

5/10

4/08

4/23

5/27

5/29

9/27

9/03

9/20

10/09

10/16

Green Bay

5/10

4/17

4/24

5/26

5/29

10/06

9/20

9/23

10/16

10/31

Kenosha

4/30

4/09

4/16

5/11

5/17

10/16

9/21

9/30

11/03

11/12

LaCrosse

4/30

4/04

4/10

5/14

5/29

10/07

9/22

9/27

10/26

11/03

Madison

5/12

4/20

4/30

5/30

6/11

9/28

9/13

9/19

10/08

10/17

Manitowoc

5/09

4/01

4/19

5/25

7/06

10/09

9/22

9/27

10/27

11/01

Milwaukee

4/29

4/03

4/13

5/15

5/27

10/16

9/22

10/03

11/01

11/19

Minocqua

5/28

5/08

5/17

6/14

6/14

9/23

8/15

8/30

10/09

10/20

Neillsville

5/19

4/23

5/02

6/03

6/11

9/23

9/03

9/12

10/03

10/06

Oconto

5/13

4/20

5/03

5/27

6/11

9/28

9/07

9/18

10/14

10/16

Oshkosh

5/09

4/08

4/21

5/23

5/29

10/04

9/16

9/21

10/23

11/02

Park Falls

5/16

4/28

5/02

5/30

6/11

9/25

9/03

9/13

10/08

10/11

Platteville

5/09

4/04

4/18

5/27

5/30

10/04

9/12

9/21

10/13

10/27

Portage

5/14

4/07

4/18

5/31

6/12

9/27

9/01

9/15

10/11

10/28

Prairie du Chien

5/04

4/05

4/20

5/19

5/29

10/06

9/22

9/24

10/18

10/27

Racine

5/02

4/09

4/17

5/11

5/13

10/19

10/04

10/07

11/02

11/05

Rhinelander

5/20

4/29

5/10

6/02

6/11

9/24

9/03

9/10

10/06

10/12

Richland Center

5/11

4/24

5/01

5/27

5/37

9/29

9/07

9/17

10/11

10/27

River Falls

5/08

4/11

4/23

5/22

5/29

10/02

9/03

9/21

10/11

10/28

St. Croix Falls

5/11

4/21

4/25

5/25

6/02

9/29

9/20

9/23

10/14

10/27

Spooner

5/27

4/11

5/08

6/14

6/24

9/23

8/15

9/01

10/03

10/09

Stevens Point

5/09

4/17

4/24

5/25

5/29

9/27

9/12

9/21

10/12

10/15

Superior

5/12

4/16

5/01

6/17

6/20

9/26

9/04

9/15

10/08

10/18

Watertown

5/05

4/08

4/14

5/23

5/29

10/06

9/20

9/23

10/17

10/28

Wausau

5/08

4/07

4/21

5/23

5/29

10/02

9/12

9/21

10/13

10/21

Wisconsin Dells

5/11

4/16

5/01

5/25

6/20

10-03

9/20

9/23

10/17

10/29

Colored line

Information from Midwestern Climate Center, Champaign, IL