If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Jihlava: The hottest months are usually August and July with an average temp of 62°F, while the coldest months are January and February with an average of 32°F. The snowiest months in Jihlava are December, November, April, and January, with each month seeing an average of 10 inches of snowfall.