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 temperature of 16°C, while the coldest months are February and January, with an average of 1°C. The rainiest months in Wetzikon are August, June, July and May, with each month seeing an average of 214 mm of rainfall.