On January 16, 2004, the summit weather observation registered a temperature of and sustained winds of , resulting in a wind chill value of at the mountain. During a 71-hour period from approximately 3 p.m. on January 13 to 2 p.m. on January 16, 2004, the wind chill on the summit never went above . The official record high temperature at the summit is on June 26, 2003, and August 2, 1975, while the official record warm daily minimum is on the latter date. Readings of 60 °F or more at the summit are seen on an average 13.5 days annually.