Planning for the weather is a good way to make your trip to Weyburn relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 66°F, while the coldest months are February and January with an average of 15°F. The snowiest months in Weyburn are April, March, November, and February, with each month seeing an average of 12 inches of snowfall.