If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Campo di Trens: The hottest months are usually July and August, with an average temperature of 10°C, while the coldest months are January and February, with an average of -6°C. The rainiest months in Campo di Trens are August, July, June and May, with each month seeing an average of 242 mm of rainfall.