In the NYC area over last few days the temperature has fluctuated between 30 to 45 degrees. This plays havoc with tyre pressures. I've had to adjust them twice. This is just a heads up to those who overlook this mundane task and a reminder to get a decent gauge if you don't already have one. Incidentally, I keep mine at 32psi all around on my 4.4i sport (19" tyres) and yes, while they are cold. Also I know we had this discussion this past week already.