According to this article from 2009 they use around 16PSI. http://www.auto123.com/en/racing-news/other/f1-technical-the-evolution-of-formula-1-tires?artid=108911 That jives with other things I saw that say 1.1 bar.
I wouldn't think there would be lot of difference between their "cold" and their running temps since they pre-heat the tires.
