How to Keep Your Car Cool in Summer

Hot weather can quickly make your car uncomfortable, especially if it’s been parked in direct sunlight. If you’re wondering how to keep your car cool in summer, a few simple steps can help reduce the temperature inside and make every journey more comfortable. In this guide, you’ll learn practical ways to keep your car cool while helping protect your car interior during hot weather.

Why Do Cars Get So Hot in Summer?

The sun’s rays penetrate your car windows and heat up the interior surfaces like seats, dashboard, and steering wheel. This effect, similar to a greenhouse, traps heat inside the cabin, sometimes pushing temperatures over 20°C beyond the outside air temperature. Dark coloured cars and interiors absorb even more heat, making them hotter faster.

How to Cool Down Your Car Quickly Before Driving

You may find that letting some of the trapped hot air escape before switching on the air conditioning helps cool the cabin more quickly. You can do this by opening windows and doors or by swinging a door while the windows are down on the opposite side. Once you start driving:

• Turn on your air conditioning on the coldest setting.
• Use fresh air intake mode first (not recirculate) to bring in cooler outside air.
• Direct air flow to lower vents (footwells) to push hot air upwards and out.
• After a minute or so, roll up the windows and switch to air recirculation to keep the cooled air inside the cabin.

Where to Park to Keep Your Car Cool

Where you park can make a big difference to the temperature inside your car. You may find that choosing a shaded space under trees, canopies or in a multi-storey car park helps reduce heat build up before you even get behind the wheel. If shade isn’t available, parking so the sun hits the rear window rather than the windscreen can also help keep the front of the car cooler.

A reflective windscreen sunshade can help block direct sunlight and protect your dashboard, steering wheel and seats from excessive heat. Where it’s safe to do so, leaving a small gap in the windows may also improve ventilation while your car is parked, although it’s important to make sure your vehicle remains secure.

Should You Leave Your Car Windows Open in Hot Weather?

Leaving your windows slightly open may improve airflow but it won’t stop your car from getting hot if it’s parked in direct sunlight. You may find it helps reduce some of the heat build up, although temperature inside can still rise quickly on warm days. If you choose to leave a small gap in the windows, it’s worth parking somewhere safe and secure.

How to Use Your Air Conditioning More Efficiently

Air conditioning is one of the quickest ways to cool your car, although using it efficiently can help reduce unnecessary fuel consumption. You may find that driving off soon after starting the engine cools the cabin faster than leaving the car idling with the air conditioning running.

Before switching to recirculation mode, it’s worth opening the windows for a few seconds to let the hottest air escape. Once the cabin starts to cool, recirculating the air can help maintain a comfortable temperature. You may also find that keeping your air conditioning system serviced, including regular filter changes and refrigerant checks can help it perform more efficiently.

Ways to Keep Your Car Cool Without Air Conditioning

If your air conditioning is broken or your vehicle lacks one, these methods can help:

• Use solar powered ventilation fans that expel hot air while drawing in cooler air.
• Cover seats and steering wheel with light coloured covers or towels to keep surfaces cool.
• Keep windows cracked open enough for airflow but secure with window deflectors.
• Use frozen bottles or gel cooling cushions and damp cloths near ventilation to reduce heat.

How to Protect Your Car Interior from Summer Heat

Hot weather can take its toll on your car interior over time, particularly if it’s regularly parked in direct sunlight. You may find that using a windscreen sunshade and covering leather seats or the steering wheel helps reduce heat build up while protecting surfaces from fading, cracking and everyday wear.

Keeping the interior clean can make it more comfortable during hot weather too. Car seat mats can help protect your seats from dirt, sweat and everyday use, while car footwell protectors help keep mud, dust and debris away from your car’s flooring, making it easier to maintain your interior throughout the summer.

Keeping Children and Pets Safe in Hot Cars

Hot weather can make the inside of a car dangerous for children and pets in a very short space of time. Even with the windows slightly open, temperatures can rise quickly so they should never be left unattended in a parked vehicle.

You may find that window sunshades help reduce direct sunlight during journeys, while cooling mats for pets or ventilated pet carriers can make travelling more comfortable. If your vehicle has remote pre conditioning, cooling the cabin before setting off can also help. Keeping plenty of drinking water in the car is another simple way to help everyone stay hydrated on hot days.

What to Do If Your Car Starts to Overheat

If your temperature gauge starts to rise or you notice steam coming from under the bonnet, pull over as soon as it’s safe to do so and switch off the engine. Allow it to cool completely before checking the coolant level, and never remove the radiator cap while the engine is still hot. If the problem continues, you may find it’s worth having your car checked by a qualified mechanic.

Keeping Your Car Cool in Hot Weather

Keeping your car cool in summer is often about a few simple habits. You may find that marking in shade, improving ventilation and using your air conditioning efficiently all help make journeys more comfortable. Planning longer trips for cooler parts of the day and carrying plenty of water can also make travelling in hot weather more enjoyable.

Protecting your car interior is just as important. Car seat mats and car footwell protectors can help protect against dirt, sweat and everyday wear, making it easier to keep your car clean throughout summer. With a little preparation, you can stay more comfortable on the road while helping to protect your vehicle from the effects of hot weather.