If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Milroy: The hottest months are usually July and August with an average temp of 69°F, while the coldest months are January and February with an average of 32°F. The snowiest months in Milroy are January, February, December, and November, with each month seeing an average of 5 inches of snowfall.