The first regular meteorological observations on Mount Washington were conducted by the U.S. Signal Service, a precursor of the National Weather Service, from 1870 to 1892. The Mount Washington station was the first of its kind in the world, setting an example followed in many other countries. For many years, the record low temperature was thought to be occurring on January 29, 1934, but upon the first in-depth examination of the data from the 19th century at NOAA's National Climatic Data Center in Asheville, North Carolina, a new record low was discovered. Mount Washington's official record low of was recorded on January 22, 1885. The official record cold daily maximum is on February 6, 1995. Highs of or below occur on 13 days annually, while lows at or below 0 °F can be expected from November 17 through April 1; from December to March, temperatures rise above freezing on only 15 days.