Current PSD (Web/Data Status). PSD has undergone major URL restructuring so that all URLs start with http://www.esrl.noaa.gov/psd/ (More Info).
Last Day of Snow in Boulder
Data from 1949-2996
Last day of measurable snow (that is, greater than a trace) (1948-1995) earliest day of last snow: Mar 22 (1992) latest day: June 7 (1993) average: April 25 first quartile April 14 median April 25 third quartile May 2
1949: 4/14 3.6 1950: 5/25 8.7 1951: 6/03 0.7 1952: 4/22 0.5 1953: 5/12 3.0 1954: 5/02 2.5 1955: 4/12 2.5 1956: 4/23 4.2 1957: 5/16 4.0 1958: 4/29 3.1 1959: 4/21 1.6 1960: 5/19 1.5 1961: 4/24 2.3 1962: 4/30 1.6 1963: 4/22 1.5 1964: 4/07 1.5 1965: 4/27 1.4 1966: 5/12 2.6 1967: 5/14 2.0 1968: 4/22 0.7 1969: 3/25 2.0 1970: 4/18 4.5 1971: 4/26 0.5 1972: 4/26 0.7 1973: 5/02 0.4 1974: 4/29 0.4 1975: 4/18 8.2 1976: 3/29 1.5 1977: 4/03 0.2 1978: 5/06 14.0 1979: 4/11 5.0 1980: 4/24 4.0 1981: 3/28 2.0 1982: 3/25 1.0 1983: 4/13 5.0 1984: 4/21 2.0 1985: 4/25 0.9 1986: 4/17 1.5 1987: 4/21 0.2 1988: 5/02 1.0 1989: 4/30 3.1 1990: 5/01 0.1 1991: 5/05 0.4 1992: 3/22 2.0 1993: 6/07 0.1 1994: 4/30 0.8 1995: 5/24 0.8 1996: 4/22 1.2 1997: 4/26 1.2 1998: 4/20 0.2 2001: 5/21 3.6 2002: 5/24 1.1 2003: 5/10 5.2 2004: 4/30 1.9 2005: 5/01 0.2 2006: 5/10 0.1[Pages are for curiosity only; there are no guarantees that the data is correct}