Planning for the weather is an important factor for making your trip to Vale dos Vinhedos a success, especially when you're splurging. The hottest months are usually January and February with an average temp of 71°F, while the coldest months are July and June with an average of 56°F. The rainiest months in Vale dos Vinhedos are October, September, January, and May, with each month seeing an average of 8 inches of rainfall.