Planning for the weather is a good way to make your trip to Frankenberg relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 63°F, while the coldest months are January and February with an average of 35°F. The snowiest months in Frankenberg are December, November, January, and February, with each month seeing an average of 13 inches of snowfall.