I've been reading up on cold weather temperature corrections. Is this something that only effects real aircraft? http://www.bluecoat.org/reports/Long_98_Cold.pdfCheersRob

I picked an RNAV(GPS) approach chart at random: KBNA RWY 31, upper left block, "Bara-VNAV NA below -15C(2F). In this case temps affect the legal minima for an approach you might fly with a simulated aircraft.