If it's early morning or evening, that can also affect temps. I find it hard to drive on first lap with cold tires and that's how it should be. Clio took me 2 laps to heat up 3 tires and the 4th tire took about 5 laps until I dropped the pressure and that bought them all into line.Yes, I'm aware. But it varies - in GT4 in career mode, though, it's usually just sunny. I didn't know it showed exact temps.