Should increased tyre pressures due to hot weather be a concern?
I have a 2015 Porsche Macan with Michelin Latitude Sport tyres, front 235/60 32PSI, rear 255/55 36PSI. Recent motorway in hot weather, the fronts were up to 38PSI and rears to 42PSI. I expect to drive on French motorways soon and the heat is likely to be greater. Is high PSI a worry?
Asked on 10 July 2025 by truelocksmith
Answered by
David Ross
Tyre pressures vary with temperature, both in terms of the ambient temperature as well as the air inside the tyres getting warmer as the vehicle is in motion. Typically the increase is between 1 and 2 PSI for every 10°C of temperature increase, so the increase you have seen is likely a combination of both. Tyres are built with tolerances to allow for this, but if you are driving long distances at higher speeds with ambient temperatures of significantly more than 30°C you may wish to set the tyres to their lowest recommended temperature and monitor them via the TPMS.
From choosing the right tyre to what to do when it goes wrong - we have the answers.
Tyre News And AdviceSimilar questions
Is 106 degrees celsius too hot for the engine of my 2007 MINI? The warning light has not come on but the bonnet gets very hot.
I lower all windows to halfway when parked on the drive in full sun and high temperatures. Is this really the best thing to do especially where windows/ sunroof have some degree of tint?
My 60 Nissan Micra has air conditioning.
I am told that using this dramatically increases the fuel consumption.
I am also told that having the windows wide open does the same.
What is the truth ?
Related models
The best car of its type to drive hands down, plush-feeling interior, great engines and a fabulous automatic gearbox.
Elsewhere on 
.jpg)
