My 4Runner does the same thing. I've noticed that when it hits 25-degrees outside my starter "spins" once, but it'll start on the second try. Last week it hit 0-degrees and it "spun" twice, but then started like normal.

Maybe the lubrication gets too thick in the cold and holds the starter gear in?

~Dave

'98 4Runner SR5, 3.4L, 5-Speed, 4WD >>K&N, ISR, TRD Clutch, 265/75R16 Yokohoma Geolandar AT+II's, OME (880/N91SC, 906/N86C)>> SOLD to pay bills.