Planning for the weather is a good way to make your trip to Porters Lake relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are February and January, with an average of -1°C. The snowiest months in Porters Lake are February, January, December and November, with each month seeing an average of 56 cm of snowfall.