If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Udine: The hottest months are usually August and July with an average temp of 70°F, while the coldest months are January and February with an average of 41°F. The rainiest months in Udine are November, September, October, and May, with each month seeing an average of 7 inches of rainfall.