If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Cudahy: The hottest months are usually July and August with an average temp of 68°F, while the coldest months are January and February with an average of 28°F. The snowiest months in Cudahy are January, March, October, and February, with each month seeing an average of 8 inches of snowfall.