 The average last + high of the warm season falls on September 22, while the average first freeze of autumn falls on November 14, yielding a growing season of 240 days.Winters are mild, but cold snaps can occur; on average there are 47 days annually with a low at or below freezing, and 4.7 days with a high at or below freezing.The official all-time record low temperature was , which occurred on December 24, 1963, while the lowest daily maximum temperature on record is on January 10, 1962; the coldest month on record was January 1918 with an average of .