Weather Facts - Duluth, Minnesota
Average summer temperatures in Duluth: 68 to 82 degrees.
Normal Mean Temperature: July 60-64 degrees; January 8-10 degrees
Average Date of Last Killing Frost in Spring: May 10-15
Average Date of Last Killing Frost in Fall: September 3-October 5
Normal Annual Precipitation: 30-32"
Mean Annual Snowfall: 55-65"
Days With Snow Cover of 1" or more from 1931-1960 was 130 days.