Boulder Monthly Means: Snowfall

Units are inches

Totals are for Sep-Jun (Snow Year) where June is row year and Jan-Dec.

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Sep-Jun Total Jan-Dec
1889 . . . . . . . . . 18.5 . . . .
1893 . . . . . . . . . 9.0 . . . .
1894 . . 14.0 . . . . . . . . 12.3 . .
1895 5.3 7.6 17.3 0.0 0.0 0.0 . . . . . . . .
1896 . . . . . . . . . . . . . .
1897 5.8 10.2 13.7 11.3 0.0 0.0 0.0 0.0 0.0 8.7 5.5 9.0 . 64.2
1898 7.0 4.2 7.5 8.2 13.0 0.0 0.0 0.0 1.0 5.0 23.5 18.0 63.1 87.4
1899 13.0 15.2 31.0 8.0 0.0 0.0 0.0 0.0 0.0 2.0 0.0 12.8 114.7 82.0
1900 4.5 14.8 6.8 20.0 0.0 0.0 0.0 0.0 0.0 0.0 3.1 9.2 60.9 58.4
1901 7.5 6.2 18.5 26.0 0.0 0.0 0.0 0.0 0.0 4.0 0.0 15.0 70.5 77.2
1902 7.2 6.5 9.5 3.0 0.0 0.0 0.0 0.0 0.0 0.5 8.0 17.0 45.2 51.7
1903 2.0 19.5 13.5 18.0 0.0 0.0 0.0 0.0 1.0 10.5 2.2 2.5 78.5 69.2
1904 2.0 3.0 16.0 1.0 0.0 0.0 0.0 0.0 0.0 5.0 1.0 8.5 38.2 36.5
1905 13.5 8.5 7.5 21.5 3.0 0.0 0.0 0.0 0.0 13.0 0.0 0.0 68.5 67.0
1906 3.2 2.5 24.0 8.0 0.0 0.0 0.0 0.0 0.0 19.0 18.0 0.0 50.7 74.7
1907 6.2 7.0 2.5 28.5 15.0 0.0 0.0 0.0 1.0 0.0 6.2 2.1 96.2 68.5
1908 10.0 1.5 3.8 5.5 8.0 0.0 0.0 0.0 8.0 15.2 31.0 15.0 38.1 98.0
1909 0.5 19.2 26.5 27.5 0.0 0.0 0.0 0.0 0.0 1.0 16.5 31.0 142.9 122.2
1910 4.0 20.8 0.0 0.2 7.0 0.0 0.0 0.0 0.0 0.0 0.5 4.5 80.5 37.0
1911 11.5 27.1 0.0 12.0 0.0 0.0 0.0 0.0 0.0 8.0 10.0 5.9 55.6 74.5
1912 2.4 22.1 12.9 0.0 7.0 0.0 0.0 0.0 0.0 3.0 2.0 2.4 68.3 51.8
1913 6.2 12.8 21.1 15.4 0.0 0.0 0.0 0.0 0.0 9.0 0.0 52.5 62.9 117.0
1914 0.0 1.7 26.9 14.8 0.0 0.0 0.0 0.0 0.0 3.0 0.9 5.3 104.9 52.6
1915 8.6 18.5 13.4 0.0 14.5 0.0 0.0 0.0 0.0 0.0 3.9 19.4 64.2 78.3
1916 11.2 0.4 12.8 14.0 5.0 0.0 0.0 0.0 0.0 10.1 17.4 13.6 66.7 84.5
1917 5.9 6.3 22.2 13.0 14.8 0.0 0.0 0.0 0.0 7.5 0.0 5.3 103.3 75.0
1918 6.8 14.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 14.0 15.5 34.1 52.8
1919 0.0 6.9 10.0 4.5 0.0 0.0 0.0 0.0 0.0 0.0 12.0 5.0 52.9 38.4
1920 12.5 14.4 6.1 40.3 0.0 0.0 0.0 0.0 0.0 4.2 13.3 13.7 90.3 104.5
1921 4.4 4.0 8.8 13.6 0.0 0.0 0.0 0.0 0.0 0.0 6.3 14.9 62.0 52.0
1922 6.0 7.6 3.6 4.7 0.0 0.0 0.0 0.0 0.0 1.1 14.0 3.7 43.1 40.7
1923 0.0 24.4 24.8 2.5 0.2 0.0 0.0 0.0 0.0 12.3 3.9 7.4 70.7 75.5
1924 7.9 2.8 22.5 16.5 0.0 0.0 0.0 0.0 0.0 0.0 1.0 14.2 73.3 64.9
1925 2.0 0.0 4.3 0.0 0.0 0.0 0.0 0.0 0.0 13.5 8.0 15.0 21.5 42.8
1926 8.5 5.8 22.0 3.0 0.0 0.0 0.0 0.0 0.0 3.0 0.0 20.8 75.8 63.1
1927 3.9 3.9 10.0 8.4 0.0 0.0 0.0 0.0 0.0 0.0 8.6 8.2 50.0 43.0
1928 0.8 16.8 16.7 2.4 0.0 0.0 0.0 0.0 0.0 0.0 19.7 0.5 53.5 56.9
1929 4.7 12.1 26.2 2.0 0.0 0.0 0.0 0.0 0.0 14.9 25.9 9.1 65.2 94.9
1930 8.9 7.3 6.5 0.0 5.5 0.0 0.0 0.0 0.0 0.0 13.3 9.8 78.1 51.3
1931 0.0 16.9 21.6 10.6 26.7 0.0 0.0 0.0 0.0 0.0 13.4 0.4 98.9 89.6
1932 4.7 14.4 14.4 5.3 0.0 0.0 0.0 0.0 0.0 6.3 5.1 8.4 52.6 58.6
1933 0.0 5.6 9.1 37.7 3.0 0.0 0.0 0.0 0.0 0.0 1.2 8.0 75.2 64.6
1934 1.0 18.1 15.5 13.3 0.0 0.0 0.0 0.0 3.0 0.0 8.4 3.0 57.1 62.3
1935 1.7 8.1 1.6 16.1 1.0 0.0 0.0 0.0 3.0 2.3 7.7 0.2 42.9 41.7
1936 5.9 7.7 24.2 9.9 0.0 0.0 0.0 0.0 8.0 6.0 3.5 5.6 60.9 70.8
1937 7.9 5.8 8.3 19.8 0.0 0.0 0.0 0.0 0.0 2.5 7.7 15.7 64.9 67.7
1938 8.7 11.3 21.8 9.0 0.0 0.0 0.0 0.0 0.0 2.7 24.9 15.3 76.7 93.7
1939 8.0 13.3 9.4 14.1 0.0 0.0 0.0 0.0 0.0 6.5 0.0 4.3 87.7 55.6
1940 24.2 15.9 14.6 8.0 0.0 0.0 0.0 0.0 0.0 0.0 7.0 6.5 73.5 76.2
1941 11.5 3.3 29.2 15.0 0.0 0.0 0.0 0.0 0.0 0.3 6.1 12.7 72.5 78.1
1942 13.3 20.9 11.7 10.0 1.5 0.0 0.0 0.0 1.0 23.0 5.2 7.9 76.5 94.5
1943 2.0 3.5 17.9 0.0 9.5 0.0 0.0 0.0 0.0 0.0 9.5 6.6 70.0 49.0
1944 13.0 5.4 41.1 27.6 2.1 0.0 0.0 0.0 0.0 0.0 4.5 9.6 105.3 103.3
1945 20.3 9.0 10.9 32.5 0.5 0.0 0.0 0.0 2.0 5.1 6.5 4.0 87.3 90.8
1946 21.2 5.5 1.0 0.0 7.5 0.0 0.0 0.0 1.0 7.3 46.7 7.0 52.8 97.2
1947 17.0 19.3 23.7 9.0 5.0 1.0 0.0 0.0 0.0 8.0 14.0 13.4 137.0 110.4
1948 35.0 9.8 27.5 2.0 0.0 0.0 0.0 0.0 0.0 12.0 13.1 8.1 109.7 107.5
1949 28.2 2.3 18.6 9.1 0.0 0.0 0.0 0.0 0.0 7.9 0.0 4.4 91.4 70.5
1950 11.8 3.7 4.2 9.0 13.7 0.0 0.0 0.0 0.0 0.0 20.4 3.2 54.7 66.0
1951 13.3 9.2 30.7 17.9 0.0 2.2 0.0 0.0 1.5 3.9 17.8 18.0 96.9 114.5
1952 1.0 7.0 26.8 9.3 0.0 0.0 0.0 0.0 0.0 2.5 26.7 3.5 85.3 76.8
1953 5.3 11.8 11.8 24.4 3.0 0.0 0.0 0.0 0.0 0.0 10.3 15.7 89.0 82.3
1954 6.7 3.4 14.2 6.8 6.5 0.0 0.0 0.0 0.0 4.2 4.0 7.5 63.6 53.3
1955 6.5 21.3 26.0 2.5 0.0 0.0 0.0 0.0 0.0 2.0 14.7 9.2 72.0 82.2
1956 5.1 25.3 18.8 9.6 0.0 0.0 0.0 0.0 0.0 2.0 20.5 8.5 84.7 89.8
1957 15.2 4.0 5.0 44.0 4.0 0.0 0.0 0.0 0.0 1.6 4.6 1.0 103.2 79.4
1958 11.9 6.4 28.8 16.1 0.0 0.0 0.0 0.0 0.2 3.5 12.3 12.2 70.4 91.4
1959 16.5 15.9 19.9 21.0 0.0 0.0 0.0 0.0 10.9 14.5 13.6 0.5 101.5 112.8
1960 10.4 21.4 10.5 7.7 1.5 0.0 0.0 0.0 0.0 4.5 5.5 18.1 91.0 79.6
1961 9.7 0.0 30.3 6.4 0.0 0.0 0.0 0.0 0.0 10.7 13.7 8.6 74.5 79.4
1962 25.1 12.5 6.6 4.3 0.0 0.0 0.0 0.0 0.0 0.0 6.9 1.5 81.5 56.9
1963 15.4 5.6 28.6 1.5 0.0 0.0 0.0 0.0 0.0 0.7 4.5 11.2 59.5 67.5
1964 7.5 12.0 22.1 16.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 12.5 74.0 81.1
1965 12.0 25.6 31.7 6.1 0.0 0.0 0.0 0.0 4.2 0.0 2.5 10.2 98.9 92.3
1966 7.3 23.9 3.8 9.0 2.6 0.0 0.0 0.0 0.0 6.1 8.4 5.2 63.5 66.3
1967 13.3 7.3 9.8 0.0 6.3 0.0 0.0 0.0 0.0 3.1 13.8 31.4 56.4 85.0
1968 0.8 19.9 13.0 15.7 0.0 0.0 0.0 0.0 0.0 0.0 7.5 9.5 97.7 66.4
1969 6.6 5.3 17.5 0.0 0.0 0.0 0.0 0.0 0.0 49.3 10.8 8.2 46.4 97.7
1970 2.0 0.0 56.7 7.5 0.0 0.0 0.0 0.0 1.5 6.2 8.0 4.0 134.5 85.9
1971 8.0 18.7 11.5 9.3 0.0 0.0 0.0 0.0 21.0 10.2 3.2 11.7 67.2 93.6
1972 13.5 6.1 9.9 0.7 0.0 0.0 0.0 0.0 0.0 10.4 26.8 19.5 76.3 86.9
1973 18.5 2.0 14.7 29.8 6.6 0.0 0.0 0.0 0.0 0.0 21.1 16.6 128.3 109.3
1974 8.0 8.4 18.3 11.4 0.0 0.0 0.0 0.0 2.7 1.2 8.4 7.9 83.8 66.3
1975 6.6 12.3 16.2 28.7 0.0 0.0 0.0 0.0 0.0 5.8 11.3 10.8 84.0 91.7
1976 8.3 6.2 16.5 0.0 0.0 0.0 0.0 0.0 0.0 2.1 1.0 7.0 58.9 41.1
1977 3.8 7.4 5.9 12.6 0.0 0.0 0.0 0.0 0.0 0.0 4.6 2.5 39.8 36.8
1978 19.6 10.5 9.9 5.9 23.0 0.0 0.0 0.0 0.0 0.0 2.5 19.5 76.0 90.9
1979 13.0 2.0 14.5 10.2 6.0 0.0 0.0 0.0 0.0 1.0 39.3 23.5 67.7 109.5
1980 14.3 13.8 18.0 5.5 0.0 0.0 0.0 0.0 0.0 2.0 9.5 0.5 115.4 63.6
1981 5.0 7.0 16.0 0.0 0.0 0.0 0.0 0.0 0.0 3.0 2.0 7.3 40.0 40.3
1982 1.0 4.0 3.5 0.0 0.0 0.0 0.0 0.0 0.0 1.5 3.5 23.5 20.8 37.0
1983 0.0 2.3 22.5 17.5 0.0 0.0 0.0 0.0 0.0 0.0 30.1 11.0 70.8 83.4
1984 6.4 9.1 19.2 12.7 0.0 0.0 0.0 0.0 4.2 11.0 0.0 4.8 88.5 67.4
1985 16.3 14.6 20.4 0.9 0.0 0.0 0.0 0.0 11.0 6.0 22.8 16.0 72.2 108.0
1986 2.0 17.8 3.0 13.5 0.0 0.0 0.0 0.0 0.0 7.0 20.3 13.0 92.1 76.6
1987 21.4 23.7 23.0 16.3 0.0 0.0 0.0 0.0 0.0 0.0 13.5 27.5 124.7 125.4
1988 6.5 16.7 24.9 4.7 1.0 0.0 0.0 0.0 0.0 0.0 5.7 31.5 94.8 91.0
1989 14.2 14.8 10.5 15.8 0.0 0.0 0.0 0.0 0.5 8.9 1.8 21.6 92.5 88.1
1990 13.0 13.3 25.0 7.6 0.1 0.0 0.0 0.0 0.0 6.1 17.1 12.7 91.8 94.9
1991 17.0 2.8 2.0 19.1 0.4 0.0 0.0 0.0 0.0 13.6 28.9 0.2 77.2 84.0
1992 10.9 0.0 19.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 44.7 18.8 73.3 94.1
1993 5.8 9.3 11.9 4.7 0.0 0.1 0.0 0.0 1.4 10.5 27.0 9.0 95.3 79.7
1994 11.5 15.4 14.9 22.8 0.0 0.0 0.0 0.0 0.4 0.0 23.7 10.3 112.5 99.0
1995 12.0 16.3 16.4 24.1 0.8 0.0 0.0 0.0 8.6 3.1 17.8 3.4 104.0 102.5
1996 29.1 5.9 17.7 7.6 0.0 0.0 0.0 0.0 6.1 0.1 16.6 6.1 93.2 89.2
1997 19.0 28.8 14.1 38.6 0.0 0.0 0.0 0.0 0.0 30.1 18.2 9.9 129.4 158.7
1998 10.4 1.7 42.6 19.4 0.0 0.0 0.0 0.0 0.0 0.0 9.5 17.8 132.3 101.4
1999 9.7 1.2 6.5 34.4 T 0.0 0.0 0.0 1.6 6.1 10.5 9.7 79.1 79.7
2000 3.8 5.4 26.6 8.9 0.0 0.0 0.0 0.0 6.5 0.9 10.9 8.5 72.6 71.5
2001 10.3 13.1 16.6 10.5 6.5 0 0 0 T 0.3 7.3 4.7 83.8 69.3
2002 18.5 8.3 22.6 0.1 1.6 0.0 0 0 0 16.1 13.0 0.5 63.4 80.7
2003 0.5 22.8 34.7 6.2 5.2 0 0 0 0 0.4 7.5 9.9 99.0 87.2
2004 12.0 18.0 7.9 14.9 . 0 0 0 0 0 17.6 6.7 70.6 77.1
2005 15.9 3.3 11.2 21.8 0.2 0 0 0 0 T 1.9 6.3 76.7 60.6
2006 5.5 11.4 23.3 2.9 0.1 T 0 0 0 15.2 12.0 45.5 51.4 115.9
2007 27.5 15.3 4.5 2.2 T 0.0 0.0 0.0 0.0 0.1 5.9 30.0 122.2 85.5
2008 10.3 10.4 17.6 7.9 0.7 0.0 0.0 0.0 0.0 0.2 1.3 20.9 82.9 69.1
2009 13.0 3.9 21.4 20.4 0.0 0.0 0.0 0.0 0.0 30.1 8.9 27.8 81.1 125.5
2010 4.6 22.9 28.7 5.8 6.6 0.0 0 0 0 T 2.0 9.5 135.4 87.1
2011 18.2 13.2 0.7 3.5 0.2 0.0 0.0 0.0 0.0 11.5 8.6 33.1 47.3 89.0
2012 7.8 32.1 T 1.6 T 0 0 0 0 7.9 0.8 11.7 94.7 61.9
2013 3.7 18.5 22.8 47.6 12.3 0.0 0.0 0.0 0.0 5.4 6.3 9.0 125.3 125.6
2014 27.2 11.7 11.2 12.2 6.8 0.0 0.0 0.0 0.5 0.0 16.9 19.8 89.8 106.3
2015 6.0 54.6 8.0 7.4 3.9 T 0 0 0 0 11.5 17.4 116.6 108.8
2016 4.1 21.8 32.5 21.4 1.00 0.0 0.0 0.0 0.0 0.0 4.4 13.0 109.7 98.2
2017 18.7 9.9 0.0 19.4 6.1 0.0 0.0 0.0 0.0 8.0 4.1 10.2 71.5 76.4
2018  8.8 18.5 6.8 6.0 0.0 0.0 0.0 0.0 0.0 10.1 16.4 5.7 62.4 72.4
2019 14.5 14.6 16.2 10.2 7.4 0.0 0.0 0.0 0.0 26.4 29.5 3.4 95.1 122.2
2020 0.0 39.1 16.3 37.3 0.0 0.0 0.0 0.0 5.7 12.5 7.5 5.8 152.0 124.2
2021 6.2 19.6 27.8 18.0 0.2 0.0 0.0 0.0 0.0 103.3 71.8
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total: Sep (previous yr)-Jun (year) Total:Jan-Dec

1991-2020 Climatology (at NIST site)
Type JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DECTotal
Mean Total 11.76 14.78 14.59 13.59 1.99 0.00 0.00 0.00 1.03 6.95 12.69 12.3389.71
Mean Snow/day0.3740.523 0.471 0.453 0.064 0.00 0.00 0.00 0.0343 0.224 0.423 0.3980.246
STD 7.74 12.23 11.02 12.59 3.24 0.02 0.00 0.00 2.34 9.17 10.24 10.48N/A

*Yes, We really had a trace of snow on June 5th