You are asking a difficult question. Mt. Whitney conditions vary from year to year, but be prepared for almost anything - no snow or deep (several meters) snow, iced-up rock on the last 400 feet, avalanche danger in the MR and the approach, cold temps, very high winds...or no snow at all and completely calm and cold. We've had two low snow years in a row, but some previous years were record-breakers.
You ought to check the local weather and snow conditions about a week before your trip and then gear up accordingly. Remember that Mt. Whitney is a lot higher than the White Mtns. of New England. In any event, be prepared for cold and high winds.
Hear is the link to the USFS Mt. Whitney trail information. You might call that office for up-to-date beta before your trip.
Mt Whitney Trail
