Summer road trips are a dream for many RVers, but they come with one big challenge—keeping your RV cool. With long hours on the road and campgrounds often exposed to direct sunlight, your RV can heat up quickly. Keeping your RV cool is not just about staying comfortable but also staying safe. High temperatures can result in rapid dehydration, overheating, or even heat stroke. But don’t worry—with the right strategies and tools, you can stay cool and comfortable all summer long. 

In many situations, relying solely on air conditioning to stay cool isn’t the most practical solution. Running the A/C can drain power quickly—especially when you’re off-grid—and it isn’t always the most energy-efficient or budget-friendly option. 

Fortunately, there are several effective and sustainable alternatives for keeping your RV cool. Here’s a breakdown of the most effective ways for how to keep your RV cool no matter where you’re parked.

1. Maximize Shade Wherever You Camp

Park in the shade

One of the easiest and most effective ways to reduce heat is by parking in the shade. Trees, buildings, or even natural land formations can shield your RV from direct sun exposure. 

Park with your major windows away from direct sunlight 

If natural shade is not available, consider the sun’s movement and park with your windshield or largest windows facing away from the sun. For instance, if you’re traveling in the northern hemisphere, park your vehicle so it is facing north. Positioning your RV so that the largest windows face away from the sun can help keep the interior cooler. 

Consider reflective tarps or awnings 

For extra shade, use reflective tarps or pop-up sunshades to cover your RV’s exterior. A good RV awning can make a major difference as well. Not only does shade reduce the inside temperature, it also gives your air conditioning system a break, helping it run more efficiently.

Install Solar Shades

Solar shades and covers are highly effective in reducing heat inside an RV by blocking and reflecting sunlight. These covers can be placed over windows, skylights, and even the roof to prevent the sun’s rays from directly hitting the interior surfaces. By reflecting most of the heat away, solar shades help maintain a cooler interior temperature, reducing the need for additional cooling methods. Most solar shades are made from reflective or light-colored materials that enhance their heat-repelling properties. This not only keeps the RV cooler but also helps protect the interior from UV damage.

2. Block Direct Sunlight Entry Points

Install Interior Shades & Blinds

Shades and blinds are versatile options for controlling heat and light inside an RV. When closed, they block out direct sunlight, reducing heat absorption while providing privacy. Many shades and blinds are designed with reflective surfaces that further enhance their ability to repel heat. By adjusting the angle of blinds, they can also help direct light away while still allowing some natural light to enter. Additionally, they can be easily retracted or adjusted to control the amount of light and heat entering the RV at different times of the day.

Install Curtains

Curtains provide an additional layer of insulation and can significantly contribute to keeping an RV cool. Heavy or thermal curtains are particularly effective, as they can block out sunlight and create a barrier against heat. By keeping the curtains closed during the hottest parts of the day, you can prevent the sun’s rays from penetrating the RV’s interior. Light-colored or reflective curtains can enhance this effect by reflecting heat away from the windows. Moreover, curtains can be easily drawn or opened to regulate the temperature as needed.

Reflectors

Sun reflectors are specialized devices designed to reflect the sun’s rays away from the RV. They are typically placed on the dashboard, windows, or other exterior surfaces exposed to direct sunlight. Made from reflective materials, these reflectors can effectively redirect sunlight away, preventing it from heating the RV’s interior. By keeping the sun’s heat out, reflectors help maintain a more comfortable temperature inside the RV, especially during peak sunlight hours. They are quick and easy to install and remove, making them a convenient and efficient cooling solution.

3. Boost Airflow with Ventilation

Cross-Ventilation with Fans

Air circulation is another great strategy to keep your RV cool. Start by opening windows and roof vents to let hot air escape. This cross-ventilation technique allows hot air to escape and cool air to enter. You can also use vent fans—like the Maxxair Vent Fan—to increase airflow throughout your space.

Open windows at night, close windows during the day 

At night, when the outside temperature drops, open up windows and use fans to bring in cooler air. During the day, shut windows and close blinds to trap the cooler air inside.

Place ice in front of your fan

You can also use a DIY cooling trick: place a bowl of ice in front of a fan for a simple evaporative cooler. For off-grid adventures, battery-powered fans can be lifesavers.

4. Minimize Heat-Generation 

Reduce heat from inside sources

One of the most effective ways to keep your RV cool is to reduce the amount of heat generated inside your RV—especially during the hottest parts of the day. While it’s easy to focus on cooling methods like fans or air conditioning, preventing heat buildup in the first place is just as important.

Avoid Indoor Cooking

Cooking indoors can quickly raise the internal temperature, especially in smaller RVs with limited ventilation. Instead, consider preparing cold meals, using a slow cooker, or grilling outside. Portable camping stoves or outdoor kitchens are excellent alternatives that help keep the heat out of your living space. Here are 18 DIY RV Outdoor Kitchen Ideas. 

Switch to Energy Efficient Lighting

Lighting also plays a role. Traditional incandescent light bulbs emit a surprising amount of heat. According to the Department of Energy, traditional incandescent light bulbs are highly inefficient, emitting roughly 90% of their energy as heat and only 10% as light. 

Swapping them out for energy-efficient LED bulbs not only helps with keeping your RV cool, but also reduces power consumption. This is a great added bonus if you’re dry camping or trying to conserve battery life. Here is a list of the most energy efficient light bulbs. 

Power Down Heat-Producing Electronics

Electronics like televisions, laptops, routers, and even phone chargers can generate excess heat when left on or plugged in. Make it a habit to unplug or power down devices when they’re not in use. This simple step can significantly lower the ambient temperature inside your RV.

5. Insulate Your RV

RV insulation prevents hot air from penetrating the RV and cool air from escaping the interior. There are several different ways to insulate your RV. Here are some tips to maximize insulation.

Insulate Windows and Doors – Ensure there is a tight seal on door and window frames. Check the caulking or signs of wear, such as cracking or dryness. Replace seals as needed.

Upgrade the Skirting – RV skirting provides a barrier between the elements and RV undercarriage. The skirting helps block heat radiation from the ground. Upgrading skirting with the right materials will provide better insulation.

Block Vents

If you notice warm drafts in your RV, then the air conditioning is not performing optimally. Warm air may be entering the RV through vents. To prevent this, block the vents and skylight with vent cushions or covers while the air conditioner is in use. Insulating the vents with foam boards is another effective solution. Covering the vents helps maintain insulation while the air conditioning is running.

Seal Exterior Compartments

Hot air may enter and warm the RV via exterior storage compartments. Ensure there is a proper seal along all compartments. Inspect for damaged seals. Reapply caulking as necessary, then seal it with new weather stripping.  

Upgrade Wall Insulation

If you want to take additional steps to maximize the efficiency of your air conditioning, it could be worthwhile to consider upgrading the wall insulation in your RV. Wall insulation helps regulate the interior temperature of the RV by preventing heat radiation. Here are three types of RV insulation, their benefits, and their drawbacks.

• Fiberglass insulation – Fiberglass insulation is the most used type of insulation in RVs. It is strong, lightweight, and relatively inexpensive to produce. It has a high thermal resistance rating, meaning it is effective at maintaining temperature in the interior of the RV. However, fiberglass is not as durable as other insulation types and is more susceptible to damage caused by moisture.
• Rigid foam insulation – By contrast, rigid foam insulation is more durable and moisture resistant than fiberglass. Available in varying thicknesses and thermal resistance ratings, this type of insulation is suitable for a broad range of climates. Some drawbacks include affordability and ease of installation.
• Spray foam insulation – Spray foam is an affordable insulation solution. It creates an excellent seal and repels moisture well. However, spray foam is somewhat challenging to install and typically has a lower thermal resistance rating.

6. Maintain the Air Conditioning Unit

Regular maintenance of your air conditioning unit is crucial for optimal performance. Clean or replace air filters as suggested by the owner’s manual. This ensures good airflow and prevents the system from working harder than necessary. Check the coils and fins for dirt and debris and keep the exterior unit free from obstructions to ensure proper ventilation.

Regular maintenance will keep your air conditioning running smoothly and prevent breakdowns. If the unit suffers an unexpected failure, air conditioning units are typically covered under an extended warranty plan. Investing in a trustworthy RV warranty can extend the lifetime of your RV. Get a quote today.

7. Invest in Portable air conditioners for RVs

When choosing a portable air conditioner for your RV, there are some important factors to consider. Key factors for efficient cooling include cooling capacity rating, portability, features, and power consumption. The BTU rating indicates a unit’s cooling capacity. For an RV, you’ll typically need a unit with a BTU rating between 8,000 and 14,000, depending on the size of the RV. Be sure to choose the recommended rating for the size of the space.

Since RVs have limited space, the size and portability of the air conditioner are key considerations. Look for a compact and lightweight unit that can be easily moved and stored when not in use. Consider the dimensions and ensure it fits in your designated space without blocking movement within the RV.

Lastly, ensure that your RV’s electrical system can handle the additional load. Portable air conditioners typically require a power source, so verify the unit’s wattage and amperage requirements. Energy-efficient models can help minimize power usage and reduce strain on your RV’s power supply.

8. Consider investing in cooling systems upgrades for RVs

Upgrade to a High-Efficiency Air Conditioner

One effective upgrade for your RV cooling system is installing a high-efficiency air conditioner. Modern units are designed to be more energy-efficient, providing better cooling while consuming less power. These air conditioners often come with features such as programmable thermostats, variable-speed fans, and better insulation, which improve their overall performance. By upgrading to a high-efficiency model, you can enjoy a cooler RV environment with lower energy costs. Plus, newer units tend to be quieter, adding to the comfort of your RV experience.

Install a Vent Fan System

Adding a vent fan system is another great way to improve your RV’s cooling capabilities. Roof-mounted vent fans can significantly increase airflow, drawing hot air out and bringing cooler air in, especially when parked in a shaded area. These fans are typically powered by the RV’s battery and can be controlled by thermostats to automatically activate when temperatures rise. Vent fans are also useful for lowering humidity and improving air quality inside the RV. This upgrade is relatively easy to install and can make a noticeable difference in comfort levels.

Add Reflective Roof Coating

Applying a reflective roof coating is a cost-effective way to reduce heat absorption and improve cooling efficiency in your RV. These coatings are designed to reflect the sun’s rays, preventing the roof from becoming excessively hot and subsequently heating the interior. Reflective roof coatings not only lower the temperature inside the RV but also protect the roof from UV damage, extending its lifespan. This upgrade can be easily applied as a DIY project or by a professional, providing long-term benefits in terms of cooling and maintenance. Additionally, this solution complements other cooling efforts, such as air conditioning and ventilation systems.

9. Control the humidity in Your RV 

Humidity control is important for ensuring comfort and preventing moisture accumulation. Too much moisture can result in mold or mildew, which poses a health hazard and causes damage to the RV interior. Here are some basic tips for reducing moisture and condensation in your RV.

Dehumidifier

Dehumidifiers are conveniently small, inexpensive appliances that remove excess moisture from the environment. They maintain a comfortable humidity level while preventing mold and microbes from thriving. Dehumidifiers work by drawing moisture from the air through cooling and releasing dry air.

10. DIY cooling solutions for your RV

DIY cooling solutions are a cost-effective alternative to keeping your RV cool during the summer months. Save money on products and professional installations while enjoying a more comfortable environment. Here are three simple projects to help maintain a comfortable temperature in your RV.

Create Vent Insulators

Another effective DIY cooling solution is making vent insulators. Use foam board or insulated cushions to cover roof vents and skylights. Measure the vent openings and cut the foam board to fit snugly, then cover it with a reflective material or fabric for added insulation. These homemade insulators can be easily inserted and removed, helping to keep cool air inside during hot days. They can easily be removed and stored when ventilation is needed.

Make Reflective Window Covers

Creating and installing reflective window covers is a simple DIY project that can significantly reduce heat gain in your RV. Make your own reflective window covers with materials like bubble insulation or aluminum foil. Cut the pieces to fit your windows precisely. Secure them with Velcro strips or suction cups for easy placement and removal. These covers keep the interior cooler by reflecting sunlight away from the RV. This inexpensive solution can make a noticeable difference in maintaining a comfortable temperature inside your RV.

Craft a DIY Evaporative Cooler

Creating a DIY evaporative cooler is a great low-tech way to cool your RV without relying on traditional methods.  You can create a simple evaporative cooler using a small fan, a container of water, and a sponge. Place the sponge in front of the fan and place it in a shallow container of water. As the fan blows air over the wet material, it produces a cooling effect through evaporation. This method is particularly effective in dry climates and provides a cost-efficient way to lower the temperature inside your RV.

11. Keep Yourself Cool, Too 

Here are a few tried-and-true ways to keep your body temperature in check—even when your RV starts to heat up.

Try Evaporative Cooling

Hang damp towels or lightweight sheets in front of open windows or near fans. As air moves across the damp fabric, it creates a natural cooling effect—like a DIY swamp cooler. You can also mist yourself with water and sit in front of a fan for quick relief.

Stay Hydrated and Dress Smart

Heat takes a toll on your body fast, so drink water regularly throughout the day—even if you don’t feel thirsty. Wear loose, light-colored, breathable fabrics like cotton or linen, and avoid dark, heavy clothing that traps heat. A cold towel around your neck can also work wonders on especially hot days.

Create a Cool Sleeping Environment

Sleeping in a hot RV can be uncomfortable, but a few simple tweaks can make a big difference. Opt for moisture-wicking, breathable sheets made of bamboo, cotton, or linen. Cooling gel pillows or pillow inserts can help regulate body temperature and promote better rest, even on muggy nights.For more ideas, here is a great article on how to keep cool while boondocking.

Final Thoughts: Keeping Your RV Cool in Summer

Keeping your RV cool in the summer doesn’t have to be a struggle. With a combination of smart shading, improved airflow, insulation, and energy-efficient strategies, you can enjoy your RV adventures without overheating. Whether you’re on-grid or off, using these tips will help you stay comfortable and protect your rig from heat-related wear and tear.

Frequently Asked Questions: How to Keep Your RV Cool

How do I keep my RV cool in extreme heat?

First, always try to park in the shadiest possible spot to avoid direct sunlight. Utilize the vehicle’s AC system to circulate cool air throughout the RV. Additionally, keep windows shut and blocked during the day and open at night if it’s cool enough. You may consider a floor or window fan for additional circulation.

Why do RVs get so hot?

Although they are larger than everyday vehicles, RVs have a relatively small indoor space that easily traps heat. RVs get hot due to high temperatures combined with a lack of ventilation. RVs typically have less insulation than a traditional home, making them less effective at blocking heat. Additionally, the metal and fiberglass materials absorb and retain heat, making the interior hotter.

How can I cool my RV down without AC?

Conserving energy during warm weather is important. There are some different ways to keep cool without running the AC. Floor fans and window fans help circulate air through the RV and can easily be moved between the sleeping area and living space. Keep the windows and curtains closed during the day to block heat. At night, crack the windows for ventilation. Park in the shade if possible and extend the awning during the day for a cool, shaded place to rest.

Do reflective window covers really help keep an RV cool?

Yes, reflective window covers like Reflectix or foil-lined sunshades are incredibly effective at blocking radiant heat. They reflect sunlight away from your RV’s interior, helping to maintain cooler temperatures inside. When used in combination with blackout curtains, they can reduce indoor heat gain by several degrees—making them one of the easiest and most affordable cooling upgrades for RV owners.

How do I keep my RV cool while driving?

To keep your RV cool while driving:

• Pre-cool the interior using your generator-powered A/C or campground power before hitting the road.
• Use cab fans to improve airflow in the driver/passenger area.
• Install insulated or tinted windshield covers to block sun exposure.
• Keep curtains or shades closed in the back of the RV to prevent heat buildup.
• If traveling with pets or family, make frequent stops to check and adjust temperatures as needed.

Is it safe to run an RV air conditioner all day?

It is generally safe to run your RV air conditioner all day—especially when plugged into shore power or using a properly rated generator. However, continuous use can increase wear on the unit and lead to higher energy costs. Make sure your RV is well-ventilated, filters are clean, and your electrical system can handle the load. If you’re using solar or battery power, long-term A/C use may not be practical without a robust power setup.

What type of insulation works best for hot weather RV camping?

For hot-weather RVing, the most effective insulation options include:

• Reflectix: Great for windows and skylights.
• Foam board: Ideal for under-bed storage and cabinet insulation.
• Thermal curtains: Provide both heat reflection and blackout functionality.
• Vent cushions: Prevent heat from entering through roof vents. Combining multiple methods creates a thermal barrier that significantly reduces indoor temperature and A/C reliance.

How hot is too hot to be inside an RV?

Anything above 85–90°F inside an RV can become uncomfortable or even dangerous—especially for children, pets, and older adults. At 100°F and above, the risk of heat exhaustion and dehydration increases significantly. Use fans, ventilation, and reflective barriers to keep interior temps manageable, and never leave pets or people unattended in an uncooled RV during extreme heat.

Can solar panels help keep my RV cool?

Indirectly, yes. Solar panels won’t cool your RV by themselves, but they can power fans, vent systems, and even your A/C if you have a high-capacity solar and battery setup. Additionally, rooftop panels offer some shade to your roof, slightly reducing the heat entering your RV. They’re especially useful for off-grid RVers who want to run cooling systems without relying on generators.

Why does my RV get so hot, even with the A/C on?

If your RV gets hot even with the A/C running, it could be due to:

• Poor insulation or heat leaks through windows and doors
• A/C unit that’s undersized or needs maintenance (like cleaning filters or coils)
• High sun exposure on your roof and windshield
• Inadequate airflow or blocked vents Combining A/C with passive cooling strategies like reflective insulation and fan circulation can help maintain a cooler interior more effectively.

How can I keep pets cool in the RV during summer?

To keep pets cool:

• Always maintain proper airflow with fans or A/C.
• Lay down cooling mats or use frozen water bottles wrapped in towels as DIY coolers.
• Keep water bowls full and shaded.
• Never leave pets alone in an RV without temperature monitoring or emergency ventilation. You can also install a temperature alert system that sends notifications to your phone if the interior gets too hot.