There’s nothing like an all-inclusive vacation in McEvoy Lake to rejuvenate you, especially when you know what kind of weather to expect. Here’s some info to help you decide when to book: The hottest months are usually July and June with an average temp of 51°F, while the coldest months are January and February with an average of 5°F. March and February are the driest months while July and June are the rainiest months.