100+ Year History: Precipitation

Basic monthly data are from the Notch Reservoir station (north slope of Mt. Greylock in North Adams) between 1899 and 1986 and from Hopkins Memorial Forest (Station 1) in Williamstown from 1986 until present. For the period 1901-1941, when precipitation was measured in Williamstown (at Williams College) and at the Notch Reservoir (Milham, W. I., 1950, Meteorology and meteorological observations in Williams College, also at Hopkins Memorial Experimental Forest and in North Adams: McClelland Press, Williamstown, 40 p.), annual totals from the two sites differed by less than 8%, on average. The “annual” column is compiled from Milham’s Williamstown and Notch records (1892-1940), from unpublished Notch records (1940-1985) and from Hopkins Forest (1986-present). Milham also reports data from 1816-1891 for Williamstown, but records are less complete and are not included here.

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
1892 2.7 1.1 1.8 0.4 5.4 2.1 4.2 4.6 1.7 1.6 3.0 5.5 34.0
1893 2.7 3.7 1.4 2.4 2.8 2.1 1.5 5.8 4.5 2.3 1.2 5.9 36.3
1894 2.5 2.3 1.1 1.8 3.2 3.0 3.4 1.5 4.6 4.9 3.8 1.8 33.9
1895 1.9 1.7 2.1 3.9 2.1 3.6 2.4 3.3 2.2 3.7 4.1 3.1 34.1
1896 0.7 2.3 3.1 0.8 2.2 2.6 3.9 3.1 4.8 2.9 3.0 1.5 30.8
1897 2.6 1.4 2.9 3.6 4.2 6.6 9.7 3.4 2.1 0.9 6.5 4.6 48.5
1898 5.3 2.2 2.5 3.6 4.1 3.0 1.5 8.5 3.2 7.0 3.3 2.4 46.5
1899 1.6 2.3 4.1 1.6 1.1 3.7 5.0 1.6 5.3 1.1 1.3 2.3 30.9
1900 4.0 6.5 3.4 2.0 2.9 3.8 4.6 4.4 1.2 2.8 3.6 1.7 40.9
1901 1.9 1.2 4.1 6.2 5.5 2.2 4.7 6.8 3.4 2.3 2.3 7.4 47.8
1902 1.9 2.0 5.1 6.4 2.2 5.0 4.7 4.0 3.9 4.5 1.0 5.8 46.3
1903 1.7 3.9 4.6 1.7 0.6 9.2 3.4 7.6 1.6 3.6 1.9 4.0 43.8
1904 3.8 2.1 3.3 3.6 2.8 4.1 2.0 4.5 5.4 2.3 1.4 2.5 38.0
1905 4.1 1.2 2.4 2.1 1.7 3.9 4.0 5.6 5.2 1.9 2.5 3.3 37.9
1906 2.6 2.8 3.9 3.0 4.6 2.7 5.9 3.7 1.9 3.2 2.1 3.0 39.4
1907 3.0 3.1 1.5 1.8 2.5 3.4 3.2 1.0 6.5 8.0 3.4 3.8 40.9
1908 2.1 6.1 2.1 2.0 4.6 2.2 5.0 3.7 0.6 1.2 0.2 3.0 33.0
1909 4.5 4.4 3.3 4.2 2.9 4.1 1.8 4.8 4.0 1.5 2.1 2.1 39.7
1910 4.8 5.4 1.0 3.1 3.9 3.9 2.2 1.9 4.0 1.5 3.4 2.3 37.3
1911 3.4 2.0 4.7 1.3 2.2 3.8 2.5 5.2 5.2 6.3 3.5 2.7 42.7
1912 2.6 1.1 5.0 3.8 2.8 0.4 2.5 1.7 2.5 4.6 2.9 2.2 31.9
1913 2.7 1.7 5.6 2.7 3.6 1.1 3.5 1.6 2.9 4.4 2.7 2.8 35.2
1914 2.9 4.1 4.6 6.0 1.7 2.3 3.6 4.2 0.4 1.1 2.0 2.4 35.3
1915 4.0 4.4 0.6 2.4 1.5 2.0 8.1 4.8 2.5 2.4 2.0 6.2 40.8
1916 1.9 4.1 4.9 3.5 3.1 3.3 4.3 2.6 4.2 1.8 4.7 3.2 41.5
1917 3.2 2.5 3.0 1.5 2.6 3.2 2.4 3.8 1.0 5.2 0.9 2.6 31.7
1918 2.6 2.9 1.4 2.3 4.2 2.7 1.7 1.9 5.2 2.7 2.2 3.8 33.3
1919 2.9 1.1 4.0 1.7 6.3 2.0 3.0 5.2 5.7 3.0 4.1 2.0 41.0
1920 2.4 4.6 5.1 4.8 1.2 3.9 5.2 2.9 6.1 2.1 6.0 4.0 48.2
1921 1.8 2.9 4.8 3.3 2.1 3.8 3.8 2.9 2.8 1.7 5.4 2.1 37.3
1922 2.0 2.4 5.2 2.4 4.6 8.5 2.5 5.4 1.5 1.7 1.5 1.9 39.6
1923 7.1 2.2 2.0 3.6 1.8 3.5 2.8 2.8 3.8 4.9 5.6 2.8 43.0
1924 3.1 2.0 1.2 5.8 3.7 1.5 2.7 4.8 5.3 0.3 2.7 2.5 35.5
1925 3.0 3.7 2.6 2.7 2.5 4.7 5.3 2.7 3.9 3.9 4.7 2.1 41.7
1926 3.0 4.2 2.8 2.8 1.2 2.9 2.8 2.6 2.5 4.7 4.0 3.0 36.5
1927 4.8 3.5 2.7 1.4 3.7 2.3 5.5 2.2 1.1 5.4 11.1 4.2 47.8
1928 3.3 3.0 4.2 3.1 2.9 6.3 4.8 4.1 2.5 0.9 1.7 1.4 38.2
1929 3.9 3.6 4.2 7.3 3.7 3.1 1.3 1.6 2.3 1.9 2.5 3.2 38.6
1930 2.6 2.7 4.9 1.5 3.4 3.1 3.0 1.4 1.7 1.6 3.7 1.3 30.9
1931 2.9 1.4 2.8 3.0 4.2 4.3 4.4 3.1 3.6 2.3 1.7 3.3 36.7
1932 5.0 2.7 2.8 2.0 2.3 2.0 3.4 2.8 1.9 3.4 5.8 1.2 35.1
1933 2.7 3.8 3.2 5.1 1.6 1.6 1.5 5.7 5.1 2.7 1.4 2.9 37.2
1934 2.9 2.9 2.1 4.3 2.4 5.9 1.9 2.4 6.0 1.8 4.9 3.2 40.8
1935 4.9 2.2 2.5 2.4 2.2 4.6 5.3 1.4 3.7 1.1 3.6 1.3 35.1
1936 5.3 2.1 6.8 4.0 2.6 1.8 1.5 4.5 1.7 3.4 2.3 3.9 39.8
1937 3.6 2.7 2.8 3.3 5.8 4.1 1.9 3.4 5.7 5.1 3.6 1.5 43.5
1938 4.6 1.7 1.7 3.0 3.2 4.2 5.1 2.7 8.7 1.9 4.5 3.5 44.8
1939 1.9 2.5 3.5 5.1 0.6 2.2 2.1 2.5 2.8 3.8 1.2 2.7 30.8
1940 1.5 3.6 5.1 5.4 4.7 2.5 3.3 2.3 3.9 1.0 4.7 3.2 41.2
1941 3.5 3.1 2.2 0.5 3.1 4.0 5.3 4.3 1.9 3.3 2.5 4.3 37.9
1942 2.4 1.4 7.1 2.1 3.8 2.1 6.6 1.3 5.3 4.4 5.8 5.7 47.8
1943 2.5 1.8 3.1 5.6 8.0 2.8 6.5 3.9 1.1 4.0 7.3 1.0 47.6
1944 1.8 2.5 4.9 4.6 1.8 4.6 6.0 1.4 6.0 2.4 3.9 2.2 42.1
1945 4.8 4.3 2.1 6.6 5.1 7.2 8.7 2.8 5.0 4.0 5.8 1.4 57.9
1946 3.3 3.9 2.0 3.5 7.9 3.8 3.2 3.5 6.6 2.8 1.7 3.4 45.5
1947 4.6 5.1 4.7 5.7 4.7 4.7 4.1 2.1 4.3 1.6 4.3 2.5 48.3
1948 2.6 3.2 3.4 5.2 7.2 6.1 2.5 1.7 2.2 1.1 6.1 8.5 49.8
1949 5.0 3.6 2.6 4.0 4.5 2.1 3.3 2.5 3.4 2.6 2.0 3.9 39.4
1950 6.1 5.1 3.7 3.5 4.7 2.6 4.1 4.4 3.4 1.6 7.3 3.3 49.9
1951 5.0 4.2 6.6 4.6 4.0 5.2 7.2 4.1 3.6 5.3 5.6 4.8 60.3
1952 5.4 3.3 2.8 4.1 6.7 7.0 3.1 5.3 4.5 1.1 2.7 5.5 51.4
1953 7.1 2.8 8.8 5.9 7.3 2.8 2.7 2.7 2.2 3.4 2.9 6.4 55.2
1954 3.4 3.8 4.4 3.9 7.7 3.2 3.2 5.6 4.5 3.1 8.1 6.0 56.9
1955 2.5 4.8 5.8 4.0 2.5 2.7 2.6 8.6 3.4 9.8 4.9 1.4 52.8
1956 3.8 4.5 6.0 5.3 2.4 2.0 4.1 1.2 6.6 2.1 5.4 4.7 47.8
1957 3.0 1.6 1.6 3.5 5.8 4.1 4.2 2.0 2.3 1.9 5.3 6.9 42.1
1958 5.5 4.2 2.6 4.1 2.7 3.7 6.2 4.5 5.5 3.9 4.6 1.5 48.9
1959 6.6 3.2 4.9 3.7 2.3 4.1 2.5 4.5 2.5 7.4 7.2 4.4 53.2
1960 4.5 4.9 3.3 4.6 1.8 4.5 6.6 3.6 9.2 2.4 3.0 2.2 50.4
1961 2.6 3.1 3.3 4.8 3.8 3.4 3.7 3.5 2.9 1.9 3.9 3.9 40.9
1962 4.1 3.8 1.2 4.9 1.5 3.8 2.3 3.3 3.1 3.6 2.7 3.3 37.6
1963 4.5 2.9 4.2 2.2 4.3 3.3 2.8 3.8 3.1 0.4 8.4 2.2 42.0
1964 5.0 3.8 4.2 3.9 1.9 2.4 3.1 2.7 1.4 1.5 2.5 4.7 37.0
1965 2.7 2.5 1.8 3.7 1.3 3.7 5.2 4.7 5.1 3.7 3.3 2.7 40.3
1966 3.6 2.6 3.8 2.1 3.5 2.7 6.5 2.7 6.4 4.0 3.2 3.0 43.8
1967 1.2 4.3 2.7 5.5 4.3 6.2 5.3 4.6 2.5 5.2 4.1 4.8 50.7
1968 2.0 1.4 4.7 4.3 4.3 7.8 1.0 1.3 3.2 3.3 5.7 7.8 46.7
1969 2.1 3.2 1.5 5.6 5.5 7.1 6.4 2.6 3.1 3.0 6.9 8.0 54.9
1970 1.3 4.4 2.0 4.5 3.9 3.9 2.5 3.6 3.2 2.9 2.2 3.7 38.0
1971 1.8 4.3 4.0 2.3 5.2 4.3 5.3 4.9 3.0 2.8 4.1 4.2 46.1
1972 2.8 6.3 6.1 3.7 6.0 7.6 2.3 2.7 2.2 4.5 7.3 4.7 56.1
1973 3.9 4.0 3.8 3.8 6.6 6.6 4.1 4.7 2.0 3.0 3.7 8.2 54.4
1974 3.4 2.3 3.6 5.7 5.4 3.9 4.6 4.4 7.8 1.7 5.0 3.8 51.5
1975 4.7 3.7 3.7 3.9 3.4 7.2 9.1 8.2 6.0 4.8 5.2 4.4 64.4
1976 5.3 2.5 4.4 4.7 7.8 3.2 5.5 9.9 4.1 4.9 1.6 2.5 56.2
1977 2.9 3.2 8.4 3.7 3.3 4.3 4.5 5.7 6.1 9.0 4.2 6.3 61.7
1978 8.0 1.0 2.3 1.7 3.1 4.6 3.1 4.8 2.6 4.7 1.9 4.3 42.0
1979 10.3 2.4 4.6 5.0 5.8 0.8 4.9 2.9 8.6 4.9 5.3 2.4 58.0
1980 1.3 1.1 8.0 4.5 1.8 6.6 2.9 2.2 2.9 4.0 3.2 1.9 40.2
1981 0.7 8.4 1.0 3.4 3.1 4.8 4.2 3.3 5.3 4.7 2.4 1.7 43.0
1982 2.3 2.6 1.2 6.8 2.7 7.5 3.7 1.8 3.2 2.3 5.5 3.9 43.3
1983 2.2 2.5 3.4 8.5 7.6 3.9 3.0 2.2 2.3 2.3 6.5 5.6 50.1
1984 2.0 4.3 4.0 3.1 11.3 1.4 6.4 3.0 1.4 2.9 3.9 2.3 46.0
1985 1.0 2.6 3.6 0.8 3.0 4.3 5.6 3.7 4.2 2.2 5.0 2.0 37.9
1986 4.9 3.0 4.6 2.3 3.2 4.9 6.0 6.3 3.2 3.8 5.8 4.4 52.4
1987 3.9 0.3 1.2 4.9 0.9 3.3 2.3 2.9 7.1 6.7 2.4 1.6 37.4
1988 2.2 4.0 3.4 2.7 2.3 3.0 5.9 6.0 2.5 2.2 7.4 2.6 44.1
1989 1.5 2.0 3.3 3.3 5.7 6.1 4.0 3.4 3.5 4.7 3.0 0.8 41.1
1990 4.4 3.5 3.5 4.6 6.4 3.6 2.5 7.4 2.1 4.0 2.8 4.0 48.6
1991 2.3 1.1 2.8 3.8 3.2 3.9 2.6 7.2 6.3 5.6 4.7 2.6 46.2
1992 2.5 1.4 2.2 2.3 4.7 2.3 5.9 1.9 2.9 2.0 3.6 4.0 35.7
1993 3.5 2.0 6.7 5.3 1.5 3.5 3.1 2.0 5.8 4.4 4.5 3.8 46.1
1994 3.1 1.1 4.8 4.3 3.8 4.0 4.6 3.2 3.7 1.2 2.4 2.4 38.4
1995 3.7 2.4 2.5 2.5 2.2 2.7 3.9 4.5 2.9 6.6 3.7 1.6 39.0
1996 1.4 1.9 1.5 6.7 4.9 2.5 7.0 1.8 5.5 2.4 2.1 5.2 42.8
1997 3.0 2.0 4.3 2.2 4.3 1.1 2.5 1.5 3.8 2.1 4.9 1.4 33.2
1998 4.3 2.0 2.6 2.5 3.5 7.5 2.6 2.3 1.7 3.7 3.4 1.8 37.7
1999 5.6 1.2 3.0 0.7 4.7 2.3 4.7 4.8 11.4 4.6 4.1 1.3 48.5
2000 4.5 3.6 4.2 4.0 5.8 11.9 5.7 8.5 5.8 2.2 3.1 4.2 63.4
2001 2.0 2.8 6.6 1.3 4.2 6.7 4.8 3.6 4.0 1.4 2.1 2.5 41.9
2002 3.5 2.7 4.5 5.2 7.7 8.6 3.2 5.8 6.8 3.8 3.1 5.1 60.0
2003 3.1 2.3 3.6 3.0 5.8 2.5 3.3 8.5 6.9 7.0 5.6 7.6 59.3
2004 1.9 1.7 3.9 4.2 6.1 4.6 6.6 7.4 7.5 2.2 4.6 4.7 55.1
2005 5.7 3.3 5.2 4.4 1.6 6.1 5.8 4.6 3.3 13.7 6.4 3.9 63.8
2006 6.9 2.1 1.6 3.4 8.0 6.3 4.7 5.3 4.2 5.6 3.9 3.4 55.2
2007 3.8 2.9 5.3 5.9 4.1 3.2 4.5 3.4 5.0 7.6 4.2 6.3 56.2
2008 1.6 7.0 7.4 3.8 1.8 6.2 7.9 5.3 5.6 6.6 2.4 7.1 62.6
2009 2.7 2.4 3.2 2.1 5.2 5.6 10.6 6.0 1.6 7.2 3.0 3.6 53.3
2010 2.6 3.3 4.8 1.9 2.5 5.0 6.7 2.2 3.1 8.1 3.5 3.9 47.5
2011 2.6 4.3 4.3 5.3 3.6 7.1 1.8 10.4 9.5 4.9 2.5 5.6 61.9
2012 3.4 1.1 1.9 2.4 5.9 3.0 2.6 4.7 5.6 4.1 0.9 4.0 39.4
2013 2.3 2.2 2.2 3.4 9.3 8.6 3.2 7.6 6.2 3.2 3.8 3.4 55.4
2014 4.0 3.5 3.4 3.6 2.2 6.4 7.8 1.3 1.4 5.8 3.1 4.9 47.1
2015 3.29 1.96 1.4 2.82 1.7 8.85 4.31 3.35 6.24 3.37 1.69 4.14 43.12
2016 1.7 5.1 3.5 2.8 2.6 2.1 4.7 5.2 3.9 4.3 3.7 3.6 43.1
2017 3.08 3.34 4.21 3.01 7.85 5.88 2.96 3.88 3.06 3.82 1.85 2.56 45.5
2018 4.82 4.4 3.56 4.85 2.09 3.64 5.58 8.34 7.24 3.97 7.21 3.98 59.68
2019 5.7 3.2 2.1 4.7 3.9 5.9 4.5 4.1 2.1 8.1 4.2 5.1 53.5
2020 2.47 3.84 3.66 4.93 2.62 2.03 5.56 5.3 3.07 3.71 4.13 3.69 45.01
2021 2.30 1.86 2.74 4.49 3.94 3.75 14.26 4.21 8 6.81 3.62 4.46 60.44
2022 1.8 4.8 4.0 4.7 2.9 2.2 3.7 1.5 8.0 2.9 4.2 3.9 44.5
2023 5.1 1.9 4.4 3.7 2.0 5.5 8.2 5.2 4.8 6.0 3.1 5.8 55.6