[Peter Matteson]

In Formula 1 they use tyre warming blankets on their tyres before putting them on the car. In wet conditions they still use them on "intermidiates", "wets", and "monsoons" (I can't make that up that's how they really refer to the wet weather tyre styles).

The wet weather tyres are made of a softer compound that allows for better traction, but will disintigrate on a dry track because they rely on the rain water to cool them. Basically I'm saying tyres are designed to be sticker when warm in all conditions so a warm tyre is always better. You may notice if you have a long enough commute how warm your tyres get even in the rain.