National Weather Service United States Department of Commerce

Below is climatological information regarding the first Fall freeze dates across the Northland.

Here are average first freeze (equal or less than 32 degrees F) dates for 
select locations across northeast Minnesota and northwest Wisconsin.
 

 

Average First Freeze

First Freeze

Last Freeze

Duluth, MN

9-30

8-27-1986

11-6-1900

International Falls, MN

9-13

7-11-1911

10-6-1919

Brainerd, MN

9-21

8-6-1977

10-12-1933

Mellen, WI

9-14

7-1-1988

10-12-1931

Two Harbors, MN

9-30

9-6-2011

11-2-1931

Grand Marais, MN

9-29

7-1-1947

11-2-1963

Hibbing, MN

9-8

7-5-2001

10-2-1990

 

Regional Map of Average first Fall Freeze dates

Median First Fall Freeze Dates Across the Upper Midwest