Planning for the weather is a good way to make your trip to Mendota relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 70°F, while the coldest months are January and February with an average of 29°F. The snowiest months in Mendota are January, November, February, and October, with each month seeing an average of 5 inches of snowfall.