If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in West Mere: The hottest months are usually April and March with an average temp of 68°F, while the coldest months are January and February with an average of 64°F. The rainiest months in West Mere are October, August, May, and July, with each month seeing an average of 11 inches of rainfall.