Mammoth Mountain has enjoyed nearly 5 FEET of new snow in December. It was a White Christmas in Mammoth Lakes with 5" of new snow falling overnight on Christmas Eve.
Mammoth Mountain Ski Area averages 400 inches of snowfall annually.
Summer Months: (April - September) Lows in the 40's and Highs in the 70's - 80's.
Winter Months: (October - March) Lows in the teens and Highs in the 40's.