How Hot Weather Affects Tyre Pressure

Author Name – Imogen Nettle

20 May 2026 49 people

Tyre Pressure in Hot Weather: What drivers need to know

Many drivers only think about tyre pressure when winter arrives, but temperature changes at any time of year can alter the air pressure inside your tyres. Even small fluctuations can affect:

- Road holding.
- Steering response.
- Braking distance.
- Fuel efficiency.
- Tyre lifespan.

Keeping your tyres correctly inflated during warm weather is essential for safe, efficient driving. This guide explains how heat affects tyre pressure, what signs to watch for, and how to keep your tyres performing at their best.

How temperature changes affect tyre pressure

Tyres are essentially reinforced rubber filled with pressurised air. Like any gas, air expands when heated and contracts when cooled. This means:

- Higher temperatures = higher tyre pressure.
- Lower temperatures = lower tyre pressure.

Road friction also generates heat, but ambient temperature (the weather) is the biggest factor.

Tyre pressure rule of thumb

Every 10°C change in temperature alters tyre pressure by 1-2 PSI.
From winter to summer, this can mean a 10-15% pressure difference, enough to noticeably change how your vehicle behaves.

Does hot weather affect tyre pressure?

Yes, hot weather impacts tyre pressure quicker than you'd expect. Heat from the road, friction, and warm air all raise internal tyre pressure.

However, modern tyres are designed with pressure tolerances, so normal summer heat won't cause problems if your tyres are healthy and correctly inflated. As a motorist driving in hot conditions, remember that:

- Manufacturer-recommended tyre pressures are based on cold tyres.
- You should always inflate tyres in the shade.
- You should never adjust pressure straight after driving, as readings are likely to be inaccurate.

How to spot an overheated tyre

Tyres absorb heat easily due to their dark colour and materials. Signs of overheating include:

- Tyres feeling hot to the touch.
- A strong rubber smell.
- Reduced handling or vibration.
- A TPMS warning (low pressure only).

If your tyres display any of these warning signs, stop driving and let them cool naturally.

Should you release air from a hot tyre?

You shouldn't release air, because if the tyre is hot, it will become underinflated once it cools. An underinflated tyre is very dangerous to drive on.

What are the risks of overinflated tyres?

When your tyre pressure is too high, it can significantly:

- Increase the risk of blowouts.
- Reduce traction, as less tread contacts the road.
- Worsen handling and braking.
- Accelerate uneven tyre wear.

Check out our guide to over-inflated tyres for a more in-depth look into the effects.

How often should you check tyre pressure?

Check your tyre pressure at least once a month, regardless of the season - even if you're not driving much.
During each check:

- Inflate tyres to the manufacturer's recommended PSI.
- Inspect for cuts, bulges, cracks, or embedded objects.
- Look for uneven wear patterns.

For more advice, check our guide to calculating your tyre pressure and ensure safer motoring.

What about TPMS (tyre pressure monitoring systems)?

Most modern cars include a TPMS, which alerts you when tyre pressure drops too low.
However, remember that:

- TPMS does not warn you about overinflation.
- Sensors can fail or give delayed readings.
- Manual checks with a tyre pressure gauge are still essential.

For peace of mind, you can visit your nearest National Tyres branch for a professional free tyre check.

The risks of driving on dangerous tyres

Every year in the UK, dangerous tyres lead to around 5,000 convictions, 900 casualties, and 160 deaths or serious injuries.*
Driving with illegal tyres can also lead to penalties like:

- A £2,500 fine per tyre.
- 3 penalty points per tyre.
- Invalidated insurance if you're involved in an accident.

A free tyre check from National Tyres can make sure your four wheels are ready for the road. Book in now to stay safe on your journeys.