There's nothing like an all-inclusive holiday in McEvoy Lake to revive you, especially when you know what kind of weather to expect. Here's some information to help you decide when to book: The hottest months are usually July and June, with an average temperature of 11°C, while the coldest months are January and February, with an average of -15°C. March and February are the driest months, while July and June are the rainiest months.