If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Ishpeming: The hottest months are usually July and August with an average temp of 62°F, while the coldest months are February and January with an average of 20°F. The snowiest months in Ishpeming are January, May, February, and April, with each month seeing an average of 30 inches of snowfall.