At what temperature do you dewinterize your RV? March 21, 2024 at 3:49 pm #40598 IA_CamperParticipant Joined: Jan 2024 Posts: 124 Likes: 132LikeUp2::Typically you want to wait until it stays above freezing for the majority of the day. It if it gets below freezing just at night you’ll be fine.