If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Piratuba: 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 58°F. The rainiest months in Piratuba are October, September, December, and May, with each month seeing an average of 8 inches of rainfall.