As a general rule of thumb, even if your RV is in use, you should probably winterize if: Temperatures are consistently at 20 degrees Fahrenheit or lower. You can't insulate and heat your RV's underbelly, or you don't have heated tanks. You're boondocking and can only run your furnace at certain times.

How cold does it have to be for RV pipes to freeze?

In general, the temperature has to dip below freezing (32 F) for approximately 24 hours for RV pipes to freeze. This is all dependent on many factors such as if you have an enclosed underbelly, heated underbelly, heat tape, insulation, or other preventative measures in place.

When can I de-winterize my RV?

Once temperatures get above freezing, anti-freeze is no longer necessary, so you'll need to de-winterize your RV plumbing. Beyond removing antifreeze from your RV's plumbing, the de-winterizing process should include checks and inspections of several exterior and interior systems.