If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Morden: The hottest months are usually August and July with an average temp of 64°F, while the coldest months are February and January with an average of 12°F. The snowiest months in Morden are April, October, January, and November, with each month seeing an average of 12 inches of snowfall.