Boulder percent of days with non-trace snow on ground
For each month, the percent of days with >= 1 inch of snow on ground is listed. Also listed is the average (climatology) for the 1991-2020 period. All measurements have been taken at NIST/DOC since 1990.
1948 2023 1948 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 0.0 0.0 9.7 20.0 25.8 1949 93.5 39.3 19.4 16.7 0.0 0.0 0.0 0.0 0.0 6.5 0.0 19.4 1950 38.7 3.6 6.5 13.3 12.9 0.0 0.0 0.0 0.0 0.0 23.3 6.5 1951 32.3 25.0 22.6 16.7 0.0 0.0 0.0 0.0 3.3 3.2 20.0 32.3 1952 29.0 3.4 32.3 3.3 0.0 0.0 0.0 0.0 0.0 3.2 36.7 0.0 1953 6.5 14.3 6.5 16.7 3.2 0.0 0.0 0.0 0.0 0.0 10.0 29.0 1954 19.4 7.1 12.9 6.7 6.5 0.0 0.0 0.0 0.0 3.2 6.7 22.6 1955 12.9 50.0 25.8 0.0 0.0 0.0 0.0 0.0 0.0 3.2 16.7 25.8 1956 16.1 51.7 22.6 10.0 0.0 0.0 0.0 0.0 0.0 3.2 30.0 9.7 1957 41.9 3.6 6.5 30.0 0.0 0.0 0.0 0.0 0.0 0.0 13.3 0.0 1958 16.1 10.7 45.2 10.0 0.0 0.0 0.0 0.0 0.0 3.2 16.7 35.5 1959 67.7 53.6 19.4 33.3 0.0 0.0 0.0 0.0 6.7 12.9 16.7 0.0 1960 58.1 44.8 41.9 3.3 0.0 0.0 0.0 0.0 0.0 0.0 10.0 54.8 1961 29.0 25.0 35.5 6.7 0.0 0.0 0.0 0.0 0.0 6.5 40.0 38.7 1962 80.6 42.9 25.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.3 9.7 1963 64.5 10.7 32.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.7 41.9 1964 22.6 31.0 22.6 10.0 0.0 0.0 0.0 0.0 0.0 0.0 23.3 22.6 1965 16.1 71.4 54.8 6.7 0.0 0.0 0.0 0.0 3.3 0.0 3.3 35.5 1966 19.4 57.1 0.0 6.7 0.0 0.0 0.0 0.0 0.0 6.5 13.3 12.9 1967 19.4 17.9 6.5 0.0 0.0 0.0 0.0 0.0 0.0 3.2 30.0 67.7 1968 48.4 24.1 6.5 13.3 0.0 0.0 0.0 0.0 0.0 0.0 16.7 22.6 1969 16.1 7.1 19.4 0.0 0.0 0.0 0.0 0.0 0.0 45.2 16.7 25.8 1970 38.7 0.0 41.9 16.7 0.0 0.0 0.0 0.0 0.0 6.5 6.7 6.5 1971 29.0 57.1 19.4 6.7 0.0 0.0 0.0 0.0 13.3 12.9 6.7 45.2 1972 32.3 13.8 12.9 0.0 0.0 0.0 0.0 0.0 0.0 6.5 53.3 74.2 1973 77.4 3.6 12.9 23.3 3.2 0.0 0.0 0.0 0.0 0.0 40.0 32.3 1974 51.6 28.6 25.8 10.0 0.0 0.0 0.0 0.0 0.0 0.0 20.0 32.3 1975 22.6 35.7 19.4 23.3 0.0 0.0 0.0 0.0 0.0 6.5 36.7 19.4 1976 29.0 13.8 32.3 0.0 0.0 0.0 0.0 0.0 0.0 3.2 3.3 9.7 1977 9.7 10.7 12.9 10.0 0.0 0.0 0.0 0.0 0.0 0.0 6.7 3.2 1978 45.2 35.7 9.7 6.7 -99.0 0.0 0.0 0.0 0.0 0.0 6.7 66.7 1979 19.4 7.1 19.4 16.7 -99.0 -99.0 0.0 0.0 -99.0 0.0 -99.0 -99.0 1980 100.0 -99.0 -99.0 -99.0 0.0 0.0 -99.0 0.0 0.0 0.0 0.0 0.0 1981 0.0 -99.0 -99.0 0.0 0.0 0.0 0.0 0.0 0.0 -99.0 0.0 0.0 1982 -99.0 -99.0 0.0 0.0 0.0 0.0 0.0 -99.0 0.0 0.0 -99.0 -99.0 1983 15.4 14.3 45.2 26.7 0.0 0.0 0.0 0.0 0.0 0.0 36.7 80.6 1984 54.8 13.8 35.5 6.7 0.0 0.0 0.0 0.0 3.3 16.1 0.0 16.1 1985 64.5 60.7 16.1 3.3 0.0 0.0 0.0 0.0 10.0 6.5 63.3 48.4 1986 6.5 35.7 0.0 10.0 0.0 0.0 0.0 0.0 0.0 6.5 26.7 93.5 1987 48.4 39.3 38.7 13.3 0.0 0.0 0.0 0.0 0.0 0.0 33.3 64.5 1988 100.0 37.9 16.1 6.7 0.0 0.0 0.0 0.0 0.0 0.0 23.3 77.4 1989 54.8 85.7 13.8 13.3 0.0 0.0 0.0 -99.0 -99.0 -99.0 -99.0 -99.0 1990 -99.0 -99.0 -99.0 3.3 0.0 0.0 0.0 0.0 0.0 3.2 30.0 45.2 1991 67.7 14.3 0.0 10.0 0.0 0.0 0.0 0.0 0.0 12.9 56.7 12.9 1992 48.4 0.0 22.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 43.3 100.0 1993 64.5 32.1 9.7 0.0 0.0 0.0 0.0 0.0 0.0 12.9 53.3 45.2 1994 19.4 75.0 16.1 20.0 0.0 0.0 0.0 0.0 0.0 0.0 53.3 9.7 1995 35.5 35.7 16.1 13.3 0.0 0.0 0.0 0.0 3.3 3.2 23.3 16.1 1996 74.2 31.0 19.4 3.6 0.0 0.0 0.0 0.0 0.0 0.0 26.7 38.7 1997 32.3 50.0 19.4 26.7 0.0 0.0 0.0 0.0 0.0 19.4 46.7 45.2 1998 67.7 3.6 29.0 13.3 0.0 0.0 0.0 0.0 0.0 0.0 16.7 58.1 1999 22.6 -99.0 -99.0 -99.0 0.0 0.0 0.0 0.0 0.0 6.5 -99.0 -99.0 2000 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 0.0 3.3 0.0 36.7 25.8 2001 41.9 39.3 19.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20.0 9.7 2002 32.3 25.0 25.8 0.0 0.0 0.0 0.0 0.0 0.0 12.9 33.3 0.0 2003 0.0 64.3 45.2 3.3 0.0 0.0 0.0 0.0 0.0 0.0 13.3 41.9 2004 32.3 62.1 6.5 3.3 0.0 0.0 0.0 0.0 0.0 0.0 23.3 41.9 2005 35.5 17.9 12.9 13.3 3.2 0.0 0.0 0.0 0.0 0.0 3.3 32.3 2006 19.4 32.1 32.3 0.0 0.0 0.0 0.0 0.0 0.0 12.9 6.7 71.0 2007 100.0 64.3 12.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.3 80.6 2008 38.7 17.2 9.7 3.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 71.0 2009 22.6 0.0 16.1 20.0 0.0 0.0 0.0 0.0 0.0 22.6 16.7 80.6 2010 61.3 64.3 32.3 0.0 3.2 0.0 0.0 0.0 0.0 0.0 0.0 9.7 2011 61.3 50.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.9 10.0 100.0 2012 29.0 72.4 0.0 3.3 0.0 0.0 0.0 0.0 0.0 9.7 3.3 29.0 2013 32.3 35.7 29.0 33.3 6.5 0.0 0.0 0.0 0.0 0.0 13.3 38.7 2014 38.7 42.9 16.1 6.7 6.5 0.0 0.0 0.0 0.0 0.0 40.0 32.3 2015 48.4 60.7 29.0 6.7 0.0 0.0 0.0 0.0 0.0 0.0 16.7 77.4 2016 61.3 41.4 32.3 10.0 0.0 0.0 0.0 0.0 0.0 0.0 6.7 22.6 2017 25.8 25.0 0.0 10.0 6.5 0.0 0.0 0.0 0.0 6.5 6.7 29.0 2018 35.5 42.9 3.2 3.3 0.0 0.0 0.0 0.0 0.0 6.5 23.3 16.1 2019 58.1 39.3 22.6 13.3 3.2 0.0 0.0 0.0 0.0 22.6 46.7 51.6 2020 0.0 82.8 16.1 26.7 0.0 0.0 0.0 0.0 6.7 12.9 23.3 35.5 2021 16.1 50.0 32.3 23.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 2022 93.5 96.4 19.4 0.0 6.5 0.0 0.0 0.0 0.0 0.0 43.3 29.0 2023 87.1 39.3 3.2 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99.0 -99 percent days with above T snow on ground Boulder CO1991-2020 Climatology of Percent of Days with snow on the ground.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|
41.6 | 40.0 | 17.6 | 8.7 | 1.0 | 0.0 | 0.0 | 0.0 | 0.4 | 5.8 | 23.3 | 42.2 |