If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Maplewood: The hottest months are usually July and August, with an average temperature of 21°C, while the coldest months are January and February, with an average of -6°C. The snowiest months in Maplewood are March, February, December and January, with each month seeing an average of 16 cm of snowfall.