Planning for the weather is a good way to make your trip to Wetzikon relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 61°F, while the coldest months are February and January with an average of 33°F. The rainiest months in Wetzikon are August, June, July, and May, with each month seeing an average of 8 inches of rainfall.