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

plot first day snow
 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}