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Summertime tire pressures - what counts as "cold" for setting tire pressure

Dark Sprite

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So where I live daytime temps in the summer months range from 35-50ºC (95-120ºF), but during the work day my car is parked in a temperature controlled car park. What this means is that setting a "cold tire pressure" at manufacturer specs at 32psi when the car is sat outside means that when I leave the work car park at the end of the day my tires have cooled to a level below the outside ambient temperature and are down to 30 psi, whereas if I set the "cold tire pressure" at 32 psi when parked inside then once I've been on the highway for a while they can get up to 38 psi. Maybe I'm overthinking it, as the owners manual does state a max hot tire pressure of 38 psi (non-HP DH) but that's for track not road use.

It doesn't take long to get up from 30 to 32 psi once I've left the temperature controlled parking, so would I be better off setting my cold tire pressure to 32 psi when the car is outside (obvs not in direct sunlight or better still after being left overnight) or inside? Basically I have two options for what constitutes "cold" 😁.

To be clear, I've not had any issues with grip, so I suppose this is more relevant from an even-tire-wear perspective...
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Zig

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Cold is unused for 8 hours
 
 








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