Know your RV’s limits first
Many RVs are built mainly for three-season use. Some have enclosed, heated underbellies and more insulation, while others have exposed plumbing and thin walls. Check your owner’s manual or ask the manufacturer what temperatures your model is designed for. Be cautious if you are unsure, and consider staying where temperatures stay near or above freezing for your first cold outing. If you are new to RVing, start with our beginner’s guide before attempting winter trips.
Forecast and site choice
- Check forecasts for wind and overnight lows, not just daytime highs, and have a backup plan.
- Choose a site with hookups if you can, since heating uses a lot of propane or electricity.
- Look for shelter from wind and sun exposure for the south-facing side. Windbreaks for camping covers using terrain and barriers against wind.
- Confirm the campground is open and has winterized water. Some parks shut off water in cold months.
- Know how to get out if snow or ice arrives.
Protecting the water system
Frozen water lines can crack fittings and cause expensive damage, so this is where preparation matters most. Common approaches include:
- Heated, drinking-water-safe hose for the hookup, and heat tape or insulation on the spigot connection, following the product’s directions.
- Using the onboard fresh tank and pump instead of a continuous hookup during the coldest nights, as some campers do, keeping the tank inside heated space.
- Letting warm air reach the underbelly. Running the furnace often helps warm enclosed spaces where lines and tanks sit, if your rig is designed that way.
- Opening cabinet doors under sinks to let heated air reach pipes.
- Disconnecting and draining hoses and lines when you are not using them in freezing conditions.
Antifreeze and temperature
RV antifreeze (usually propylene glycol based and labeled for potable water systems) is typically used to winterize when a rig will sit unused, not for everyday camping. Its freeze or burst protection varies by product and mix, so read the label rather than relying on a general number. Do not use automotive antifreeze in a water system.
Waste tanks
Keep the gray and black valves closed until you are ready to dump, then dump and close them again. Leaving them open can let liquid drain while solids stay behind. Use a heated or insulated sewer hose when possible, and check your park’s winter dumping rules.
Heating safely
- Use your furnace as the main heat source when possible, since it is designed for the RV. Relying only on a portable electric heater can mean the main thermostat never calls for heat, leaving the underbelly colder.
- Follow heater instructions. Keep space heaters away from bedding and curtains, never leave them unattended, and avoid overloaded cords or power strips.
- Install and test a carbon monoxide alarm. Never use a cooking stove, oven, or outdoor heater to heat the interior, and do not run a generator near windows or vents.
- Check smoke and propane alarms, and replace batteries before the trip.
- Keep a vent slightly open if the heater’s instructions advise it.
Controlling moisture
Breathing, cooking, and showering add moisture, which condenses on cold surfaces and can lead to mold.
- Run vent fans while cooking and showering.
- Crack a roof vent slightly to let humid air out.
- Wipe condensation from windows.
- Consider a dehumidifier suited to your power limits.
- Keep wet gear in a vestibule or outside.
Insulation and skirting
- Seal obvious drafts around doors and windows.
- Use insulated window covers or heavy curtains.
- Add rugs or mats over cold floors.
- Install skirting around the base. Some use foam boards or fitted vinyl. It limits wind under the RV, but be sure it does not block vents or heater exhaust.
- Cover roof vents with insulated vent covers.
Power and propane
Cold weather increases propane use, so carry spare fuel or confirm refill options nearby; our propane tank sizes for camping guide helps you plan how much. Electric heaters can overload a campsite circuit, particularly on 30-amp service, so check your amp load. Cold also reduces battery performance. Our RV camping essentials article covers cords and surge protection.
Keeping yourself warm
Dress in layers, bring warm sleeping bags or extra blankets, and wear a hat at night. Staying warm while winter camping has more tips that carry over to an RV. Eat regular meals and drink fluids. Our RV camping checklist can be adapted for winter by adding the items above.
Smaller things worth a look
- Place boards under stabilizer jacks so they do not freeze to the ground.
- Check plastic parts and seals, which can become brittle in the cold.
- Keep walkways clear of ice and carry de-icer or sand.
FAQ
Can you live in a camper in the winter? Some people do, but it takes planning, a rig suited to the conditions, and constant attention to plumbing, heat, and moisture. Many rigs are not designed for it.
At what temperature will RV antifreeze freeze? It depends on the product and dilution. Check the label for the stated protection rating.
What are the 3-3-3 and RV-10 rules? Informal guidelines: 3-3-3 suggests about 300 miles, arriving by about 3 p.m., and staying 3 nights, which is helpful in short winter daylight. The RV-10 rule refers to some parks’ limits on RVs older than about ten years.