 With a minimum average monthly low temperature of and a maximum average monthly low temperature of , Duluth was found to be the fifth-coldest city in the United States.Summers are warm, though nights are generally cool, with daytime temperatures averaging in July, with the same figure over inland.Temperatures reach or exceed on only 2 days per year, while the city has officially only seen temperatures on 3 days, all during the July 1936 heat wave, part of the Dust Bowl years.