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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 The "annual" column is compiled from Milham's Williamstown and Notch records (1892-1940), from unpublished Notch records (1940-1985) and from Hopkins Forest (1986-present).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 2.68 1.13 1.75 0.4 5.43 2.07 4.22 4.58 1.68 1.57 2.99 5.46 33.96
1893 2.72 3.72 1.39 2.43 2.75 2.08 1.46 5.84 4.46 2.26 1.22 5.94 36.27
1894 2.54 2.29 1.13 1.82 3.16 2.99 3.39 1.46 4.58 4.91   1.75  
1895 1.87 1.7 2.1 3.9 2.1 3.62 2.37 3.25 2.22 3.74 4.12 3.11 34.1
1896 0.71 2.29 3.1 0.79 2.22 2.55 3.89 3.06 4.83 2.94 2.98 1.46 30.82
1897 2.62 1.37 2.93 3.6 4.21 6.61 9.74 3.4 2.12 0.86 6.46 4.61 48.43
1898 5.25 2.15 2.47 3.6 4.1 3.01 1.48 8.51 3.22 6.99 3.25 2.42 46.45
1899 1.61 2.31 4.05 1.58 1.06 3.66 5.03 1.6 5.31 1.11 1.3 2.29 30.91
1900 3.95 6.54 3.42 2.03 2.87 3.75 4.63 4.39 1.2 2.8 3.59 1.69 40.86
1901 1.85 1.15 4.07 6.15 5.46 2.2 4.69 6.83 3.41 2.3 2.29 7.42 47.82
1902 1.85 2.03 5.1 6.4 2.17 4.96 4.72 4.01 3.89 4.46 0.99 5.75 46.33
1903 1.68 3.86 4.64 1.74 0.63 9.16 3.38 7.64 1.56 3.55 1.92 4.02 43.78
1904 3.8 2.13 3.34 3.64 2.78 4.09 2.04 4.53 5.43 2.28 1.4 2.54 38
1905 4.14 1.16 2.39 2.14 1.7 3.87 3.95 5.62 5.19 1.88 2.49 3.34 37.87
1906 2.59 2.82 3.93 3.02 4.58 2.69 5.9 3.67 1.91 3.18 2.11 3.04 39.44
1907 2.98 3.09 1.48 1.83 2.47 3.35 3.15 1 6.48 8 3.36 3.75 40.94
1908 2.14 6.11 2.09 1.98 4.63 2.23 5.02 3.7 0.6 1.22 0.24 3 32.96
1909 4.5 4.38 3.34 4.22 2.9 4.14 1.78 4.76 3.98 1.49 2.1 2.13 39.72
1910 4.78 5.35 1.01 3.08 3.92 3.88 2.17 1.87 3.97 1.52 3.43 2.29 37.27
1911 3.36 2.02 4.72 1.34 2.24 3.75 2.45 5.19 5.19 6.26 3.47 2.7 42.69
1912 2.59 1.1 4.96 3.82 2.83 0.39 2.49 1.66 2.49 4.57 2.89 2.15 31.94
1913 2.69 1.65 5.55 2.65 3.63 1.1 3.47 1.63 2.85 4.44 2.7 2.79 35.15
1914 2.9 4.13 4.61 6.04 1.71 2.31 3.59 4.16 0.39 1.06 2.01 2.42 35.33
1915 3.99 4.44 0.55 2.36 1.53 2.01 8.05 4.75 2.49 2.41 2.03 6.15 40.76
1916 1.85 4.11 4.93 3.49 3.08 3.25 4.28 2.6 4.2 1.81 4.71 3.15 41.46
1917 3.18 2.49 2.99 1.49 2.63 3.17 2.37 3.77 0.97 5.19 0.87 2.61 31.73
1918 2.55 2.89 1.41 2.28 4.15 2.66 1.67 1.85 5.16 2.71 2.18 3.77 33.28
1919 2.87 1.13 4.03 1.65 6.31 1.98 2.98 5.15 5.74 3.03 4.05 2.04 40.96
1920 2.44 4.6 5.08 4.78 1.18 3.94 5.16 2.87 6.05 2.11 5.95 4.04 48.2
1921 1.83 2.94 4.8 3.3 2.06 3.76 3.75 2.93 2.77 1.72 5.39 2.09 37.34
1922 1.99 2.38 5.17 2.41 4.62 8.53 2.54 5.4 1.47 1.7 1.51 1.88 39.6
1923 7.13 2.23 1.97 3.64 1.78 3.45 2.82 2.83 3.77 4.94 5.63 2.77 42.96
1924 3.11 2.01 1.17 5.77 3.66 1.45 2.65 4.79 5.32 0.3 2.73 2.51 35.47
1925 2.98 3.67 2.55 2.73 2.47 4.67 5.32 2.74 3.85 3.94 4.67 2.06 41.65
1926 3.04 4.18 2.77 2.79 1.2 2.88 2.77 2.63 2.54 4.68 3.98 3 36.46
1927 4.83 3.5 2.72 1.36 3.67 2.34 5.5 2.22 1.08 5.38 11.07 4.16 47.83
1928 3.27 2.96 4.2 3.13 2.86 6.31 4.83 4.11 2.49 0.91 1.69 1.39 38.15
1929 3.94 3.55 4.24 7.31 3.67 3.07 1.32 1.55 2.28 1.94 2.5 3.2 38.57
1930 2.57 2.71 4.87 1.53 3.44 3.08 3.02 1.38 1.68 1.64 3.72 1.25 30.89
1931 2.86 1.38 2.83 2.97 4.17 4.26 4.4 3.06 3.59 2.26 1.68 3.26 36.72
1932 4.95 2.74 2.76 1.97 2.32 1.96 3.43 2.77 1.9 3.36 5.75 1.17 35.08
1933 2.67 3.77 3.17 5.09 1.59 1.58 1.49 5.74 5.08 2.7 1.38 2.91 37.17
1934 2.91 2.9 2.14 4.34 2.44 5.85 1.87 2.38 5.99 1.83 4.93 3.22 40.8
1935 4.91 2.16 2.5 2.37 2.18 4.56 5.27 1.39 3.73 1.09 3.63 1.28 35.07
1936 5.25 2.09 6.84 3.95 2.64 1.75 1.51 4.49 1.71 3.4 2.29 3.92 39.84
1937 3.63 2.74 2.8 3.34 5.82 4.1 1.89 3.43 5.65 5.07 3.6 1.46 43.53
1938 4.6 1.68 1.73 3.03 3.18 4.16 5.09 2.73 8.72 1.92 4.5 3.47 44.81
1939 1.89 2.54 3.49 5.06 0.61 2.21 2.11 2.47 2.77 3.78 1.19 2.67 30.79
1940 1.48 3.61 5.08 5.38 4.69 2.51 3.31 2.34 3.93 0.95 4.68 3.24 41.2
1941 3.46 3.08 2.15 0.53 3.08 4.03 5.29 4.26 1.93 3.27 2.52 4.26 37.86
1942 2.36 1.38 7.12 2.1 3.75 2.14 6.59 1.29 5.26 4.39 5.75 5.67 47.8
1943 2.53 1.82 3.13 5.55 8.03 2.8 6.52 3.88 1.07 3.96 7.31 0.97 47.57
1944 1.75 2.53 4.93 4.55 1.84 4.57 6 1.43 6.01 2.36 3.87 2.24 42.08
1945 4.81 4.3 2.08 6.59 5.14 7.23 8.69 2.79 5.04 4 5.84 1.43 57.94
1946 3.32 3.9 1.98 3.48 7.86 3.75 3.24 3.52 6.62 2.75 1.68 3.44 45.54
1947 4.62 5.11 4.67 5.71 4.73 4.72 4.12 2.07 4.25 1.55 4.25 2.52 48.32
1948 2.55 3.22 3.4 5.22 7.17 6.12 2.47 1.71 2.21 1.09 6.09 8.53 49.78
1949 4.99 3.55 2.55 3.98 4.45 2.14 3.29 2.51 3.41 2.63 2.01 3.93 39.44
1950 6.12 5.14 3.65 3.52 4.73 2.62 4.09 4.36 3.36 1.64 7.34 3.34 49.91
1951 5.02 4.23 6.64 4.57 3.95 5.22 7.21 4.13 3.63 5.26 5.63 4.8 60.29
1952 5.43 3.34 2.76 4.05 6.65 6.99 3.05 5.33 4.46 1.1 2.7 5.54 51.4
1953 7.12 2.81 8.83 5.94 7.26 2.77 2.72 2.74 2.21 3.39 2.93 6.43 55.15
1954 3.44 3.83 4.35 3.92 7.69 3.19 3.24 5.59 4.53 3.12 8.08 5.96 56.94
1955 2.48 4.79 5.77 4.01 2.5 2.72 2.57 8.57 3.37 9.77 4.9 1.35 52.8
1956 3.75 4.5 5.99 5.29 2.35 2 4.12 1.16 6.55 2.05 5.37 4.71 47.84
1957 2.97 1.56 1.63 3.5 5.84 4.07 4.19 2.02 2.29 1.86 5.27 6.87 42.07
1958 5.53 4.23 2.55 4.11 2.72 3.73 6.15 4.51 5.53 3.87 4.56 1.45 48.94
1959 6.62 3.17 4.93 3.66 2.33 4.05 2.46 4.5 2.46 7.42 7.18 4.38 53.16
1960 4.47 4.93 3.32 4.56 1.83 4.47 6.55 3.55 9.16 2.44 2.95 2.15 50.38
1961 2.61 3.1 3.27 4.81 3.79 3.41 3.7 3.53 2.92 1.9 3.94 3.92 40.9
1962 4.05 3.8 1.2 4.94 1.45 3.84 2.29 3.26 3.09 3.61 2.7 3.34 37.57
1963 4.45 2.87 4.19 2.23 4.26 3.26 2.79 3.81 3.14 0.37 8.42 2.2 41.99
1964 4.98 3.83 4.22 3.87 1.87 2.42 3.08 2.73 1.35 1.47 2.51 4.69 37.02
1965 2.67 2.51 1.79 3.67 1.3 3.7 5.21 4.72 5.06 3.72 3.25 2.71 40.31
1966 3.55 2.57 3.83 2.09 3.47 2.66 6.48 2.65 6.35 4.03 3.18 2.95 43.81
1967 1.21 4.33 2.72 5.54 4.34 6.16 5.25 4.61 2.5 5.16 4.14 4.76 50.72
1968 1.97 1.4 4.72 4.31 4.26 7.81 1 1.3 3.2 3.28 5.66 7.75 46.66
1969 2.08 3.24 1.52 5.61 5.47 7.09 6.4 2.59 3.05 2.97 6.91 7.97 54.9
1970 1.3 4.36 1.97 4.51 3.92 3.92 2.48 3.57 3.16 2.92 2.18 3.71 38
1971 1.82 4.33 4 2.3 5.17 4.28 5.26 4.89 3.04 2.77 4.09 4.17 46.12
1972 2.76 6.32 6.12 3.74 5.97 7.59 2.27 2.72 2.2 4.47 7.28 4.67 56.11
1973 3.92 3.97 3.8 3.75 6.62 6.61 4.1 4.7 2.02 3 3.68 8.2 54.37
1974 3.38 2.29 3.63 5.66 5.36 3.85 4.63 4.37 7.84 1.71 5.02 3.8 51.54
1975 4.68 3.71 3.67 3.86 3.44 7.23 9.06 8.24 6.04 4.79 5.24 4.39 64.35
1976 5.3 2.47 4.35 4.67 7.81 3.16 5.5 9.87 4.06 4.93 1.63 2.45 56.2
1977 2.94 3.24 8.39 3.71 3.28 4.32 4.53 5.69 6.07 9.01 4.24 6.27 61.69
1978 8.02 1.02 2.27 1.71 3.11 4.55 3.09 4.76 2.63 4.69 1.9 4.29 42.04
1979 10.26 2.42 4.62 5.02 5.76 0.76 4.9 2.91 8.63 4.93 5.34 2.43 57.98
1980 1.3 1.09 8 4.45 1.83 6.56 2.85 2.18 2.9 3.97 3.23 1.86 40.22
1981 0.66 8.43 1.01 3.42 3.05 4.84 4.16 3.28 5.32 4.65 2.43 1.7 42.95
1982 2.3 2.58 1.23 6.76 2.71 7.46 3.69 1.75 3.17 2.34 5.46 3.89 43.34
1983 2.24 2.49 3.43 8.45 7.64 3.88 3.01 2.24 2.33 2.32 6.5 5.61 50.14
1984 2.04 4.33 3.96 3.13 11.31 1.37 6.36 2.98 1.42 2.88 3.87 2.3 45.95
1985 0.97 2.64 3.55 0.75 3.01 4.3 5.58 3.73 4.18 2.23 5.02 1.95 37.91
1986 4.86 2.97 4.59 2.33 3.19 4.93 5.98 6.34 3.24 3.76 5.84 4.36 52.39
1987 3.85 0.28 1.18 4.86 0.94 3.31 2.32 2.92 7.05 6.69 2.37 1.58 37.35
1988 2.21 4.01 3.43 2.71 2.26 2.97 5.85 6 2.48 2.18 7.39 2.58 44.07
1989 1.46 2 3.32 3.26 5.66 6.08 3.97 3.35 3.52 4.7 2.95 0.82 41.09
1990 4.36 3.45 3.5 4.57 6.38 3.61 2.45 7.43 2.08 4.01 2.77 4 48.61
1991 2.31 1.06 2.8 3.75 3.23 3.92 2.62 7.23 6.34 5.59 4.7 2.62 43.89
1992 2.45 1.4 2.16 2.34 4.73 2.26 5.87 1.86 2.94 2 3.63 4.04 35.68
1993 3.47 2 6.71 5.29 1.46 3.49 3.14 2.04 5.78 4.36 4.52 3.8 46.06
1994 3.06 1.05 4.78 4.33 3.8 4.04 4.55 3.18 3.68 1.15 2.35 2.39 38.4
1995 3.68 2.38 2.5 2.46 2.2 2.68 3.86 4.48 2.88 6.6 3.7 1.55 38.97
1996 1.41 1.91 1.47 6.66 4.89 2.54 6.99 1.77 5.53 2.35 2.09 5.2 46.2
1997 3.02 1.95 4.3 2.21 4.34 1.05 2.52 1.54 3.83 2.13 4.94 1.35 35.64
1998 4.3 1.96 2.63 2.45 3.45 7.49 2.61 2.3 1.72 3.65 3.36 1.82 37.74
1999 5.63 1.23 3.03 0.73 4.69 2.25 4.69 4.84 11.36 4.61 4.12 1.34 48.52
2000 4.54 3.6 4.15 3.98 5.84 11.88 5.66 8.51 5.79 2.21 3.11 4.17 63.44
2001 2.03 2.77 6.55 1.32 4.17 6.73 4.75 3.61 4.01 1.36 2.07 2.51 41.88
2002 3.48 2.66 4.47 5.2 7.7 8.64 3.22 5.82 6.79 3.81 3.14 5.06 59.99
2003 3.08 2.28 3.62 2.98 5.8 2.5 3.33 8.51 6.92 7 5.62 7.63 59.27
2004 1.86 1.73 3.85 4.16 6.08 4.58 6.56 7.36 7.49 2.23 4.59 4.65 55.14
2005 5.65 3.26 5.15 4.41 1.6 6.14 5.79 4.59 3.25 13.69 6.36 3.94 63.83
2006 6.88 2.09 1.56 3.4 7.99 6.3 4.71 5.28 4.21 5.57 3.87 3.37 55.23
2007 3.8 2.89 5.29 5.89 4.13 3.23 4.49 3.44 4.97 7.56 4.22 6.25 56.16
2008 1.58 7.01 7.36 3.77 1.82 6.2 7.92 5.34 5.57 6.55 2.36 7.07 62.55
2009 2.72 2.38 3.2 2.09 5.24 5.59 10.63 5.95 1.61 7.24 3 3.63 53.28
2010 2.59 3.28 4.75 1.87 2.47 5 6.73 2.16 3.05 8.12 3.52 3.91 47.45
Average 3.4 3 3.6 3.6 3.8 4 4.2 3.8 3.9 3.5 3.8 3.5 44.4
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