If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Ironwood: The hottest months are usually July and August with an average temp of 63°F, while the coldest months are February and January with an average of 19°F. The snowiest months in Ironwood are April, March, January, and December, with each month seeing an average of 20 inches of snowfall.