YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | 7.11 | 18.61 | 25.48 | 50.75 | 51.44 | 57.63 | 63.40 | a | 63.37 | 55.78 | 46.31 | 27.38 | 13.48 | 40.06 | ||||||||||||
1916 | -5.13 | 5.83 | 21.87 | a | 39.84 | a | 51.56 | 59.17 | a | 74.23 | 66.48 | 56.64 | a | 41.47 | ----- | z | 28.73 | p | 41.20 | b | ||||||
1917 | 1.39 | d | ----- | z | 25.28 | a | 39.55 | 53.23 | 62.38 | a | 71.40 | a | 66.42 | 58.00 | a | 34.27 | a | 36.50 | 2.08 | l | 44.84 | b | ||||
1918 | -0.08 | a | 11.83 | b | 36.89 | 44.28 | 53.40 | 61.83 | 67.00 | 65.74 | 49.55 | 45.62 | a | 28.85 | 14.47 | 39.95 | ||||||||||
1919 | 12.06 | d | 5.64 | 18.44 | 41.33 | a | 55.15 | 65.65 | 68.45 | a | 66.58 | 59.63 | 33.78 | a | 15.12 | e | 7.37 | a | 37.43 | |||||||
1920 | -0.58 | a | 12.54 | a | 24.13 | 32.88 | a | 55.92 | 62.45 | 69.39 | 68.89 | 60.68 | 49.66 | ----- | z | ----- | z | 43.59 | b | |||||||
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.12 | 72.02 | b | 64.85 | 54.88 | 45.52 | 28.17 | 2.11 | 47.24 | e | ||||||
1965 | -1.39 | 8.21 | 15.89 | 41.22 | 54.13 | a | 62.75 | 67.48 | 65.63 | 46.80 | 46.84 | 25.40 | 19.82 | 37.73 | ||||||||||||
1966 | -7.27 | 6.07 | 32.54 | f | 36.77 | 51.85 | 64.72 | 72.18 | 65.08 | 58.10 | 45.39 | 21.57 | 10.76 | 38.66 | a | |||||||||||
1967 | 8.16 | 3.89 | 27.08 | 37.50 | 49.63 | 62.37 | 67.82 | 67.23 | 60.28 | 44.27 | 28.40 | 14.52 | 39.26 | |||||||||||||
1968 | 6.42 | 9.34 | 34.24 | 43.78 | 51.89 | 63.33 | 67.92 | 66.26 | 58.43 | 46.21 | 29.97 | 9.11 | 40.58 | |||||||||||||
1969 | -2.06 | 14.41 | 17.35 | 44.40 | 56.77 | 58.35 | 67.95 | 72.18 | 59.72 | 40.31 | 30.78 | a | 15.82 | 39.66 | ||||||||||||
1970 | 0.82 | 12.14 | 17.15 | 40.03 | 53.15 | 68.93 | 72.66 | l | 70.47 | 59.95 | 45.89 | 26.52 | 8.85 | 36.72 | a | |||||||||||
1971 | -2.21 | 11.38 | 25.98 | 45.10 | 54.00 | 66.37 | 65.53 | 68.89 | 58.03 | 47.16 | 27.37 | 11.11 | 39.89 | |||||||||||||
1972 | 2.76 | 4.81 | 25.00 | 40.03 | 59.02 | 65.98 | 66.68 | 69.50 | 56.03 | 42.55 | 26.77 | 4.74 | 38.66 | |||||||||||||
1973 | 14.03 | 19.09 | 35.26 | 42.70 | 55.50 | 65.07 | 68.81 | 72.21 | 56.10 | 49.85 | 24.10 | 8.89 | 42.63 | |||||||||||||
1974 | 0.10 | 8.64 | 19.39 | 41.03 | 52.05 | 64.98 | 73.90 | a | 64.45 | 55.13 | 47.35 | a | 29.18 | 20.43 | a | 39.72 | ||||||||||
1975 | 12.77 | 11.95 | f | 19.62 | a | 34.75 | 56.77 | 64.92 | 72.32 | 67.42 | 55.47 | 48.66 | 31.19 | a | 14.53 | 43.49 | a | |||||||||
1976 | 7.26 | b | 22.02 | a | 23.16 | 46.50 | 55.90 | 66.67 | 68.90 | a | 71.85 | 61.09 | a | 40.23 | 23.97 | 1.58 | l | 44.32 | a | |||||||
1977 | -4.10 | 18.65 | a | 31.79 | 49.85 | 66.11 | 66.08 | 70.55 | 61.90 | 56.55 | 45.67 | j | 14.20 | y | 6.23 | 42.36 | b | |||||||||
1978 | -2.47 | b | 4.31 | a | 20.00 | i | 41.82 | 57.91 | d | 64.40 | a | 69.80 | a | 68.95 | 62.38 | a | 46.95 | 21.34 | a | 6.15 | a | 40.14 | a | |||
1979 | -6.31 | b | -3.07 | 19.67 | b | 33.88 | a | 49.98 | 64.22 | 70.07 | a | 65.72 | a | 61.50 | 43.82 | 24.22 | 21.45 | 37.10 | ||||||||
1980 | 6.85 | a | 9.73 | e | 21.07 | a | 49.55 | 61.50 | 65.98 | a | 70.23 | p | 66.11 | 56.28 | 42.34 | 33.14 | b | 14.20 | a | 38.80 | a | |||||
1981 | 13.40 | 21.87 | a | 34.63 | 47.62 | b | 56.03 | 61.94 | d | 70.62 | c | 69.76 | 57.73 | 43.50 | c | 35.95 | ----- | z | 46.64 | a | ||||||
1982 | -8.91 | d | 6.86 | 20.98 | a | 39.95 | 56.32 | a | 58.32 | 69.74 | f | 67.21 | 57.43 | 44.10 | b | 22.17 | a | 19.31 | 34.89 | a | ||||||
1983 | 14.68 | a | 20.12 | b | 27.31 | e | 38.96 | c | 51.17 | b | 64.38 | a | 73.26 | 74.47 | 57.17 | 42.94 | 28.23 | -1.67 | e | 40.92 | ||||||
1984 | 12.06 | e | ----- | z | 21.03 | 43.76 | a | 54.24 | 65.05 | 70.71 | 72.40 | 54.67 | 45.25 | a | 27.38 | a | 8.07 | b | 43.15 | a | ||||||
1985 | 7.43 | d | 12.56 | b | 32.05 | 46.75 | 59.15 | a | 59.48 | a | 69.19 | e | 63.92 | 52.11 | b | 43.05 | a | 14.67 | c | 2.10 | g | 41.85 | a | |||
1986 | 13.57 | a | 9.03 | i | 33.20 | a | 42.28 | 57.02 | a | 65.11 | c | 69.21 | e | 63.39 | 53.75 | 43.32 | a | 19.57 | a | 18.98 | b | 43.58 | a | |||
1987 | 16.31 | b | 23.75 | 25.17 | b | 49.48 | b | 58.42 | a | 66.24 | c | 70.19 | 64.40 | a | 58.45 | 41.60 | 31.71 | a | 18.40 | 43.68 | ||||||
1988 | 3.68 | c | 7.81 | b | 28.08 | 42.60 | a | 62.60 | 74.17 | a | 74.86 | b | 71.82 | a | 58.40 | 42.58 | a | 25.70 | 13.62 | a | 42.16 | |||||
1989 | 10.52 | c | 2.21 | b | 20.69 | b | 41.50 | a | 58.06 | 64.00 | a | 74.55 | a | 70.48 | 59.32 | 44.75 | a | 23.18 | 5.69 | 39.58 | ||||||
1990 | 21.79 | b | 17.48 | 32.31 | 43.09 | a | 53.69 | 65.98 | 67.08 | g | 69.77 | 61.60 | 45.27 | 30.35 | 9.35 | 40.97 | a | |||||||||
1991 | 6.18 | 21.71 | 28.45 | 46.60 | 59.61 | 68.47 | 69.66 | 71.77 | 58.03 | a | 41.48 | 22.27 | 18.06 | 42.69 | ||||||||||||
1992 | 15.66 | 22.41 | 32.48 | 41.71 | d | 59.55 | a | 62.48 | 62.77 | c | 63.57 | a | 56.64 | a | 43.66 | 24.22 | a | 8.78 | d | 41.16 | ||||||
1993 | 8.19 | d | 8.45 | 25.78 | b | 42.38 | 56.08 | a | 60.92 | 64.24 | d | 67.25 | a | 54.07 | 43.23 | 24.50 | a | 13.89 | 39.08 | |||||||
1994 | -6.20 | a | 1.82 | 29.94 | 42.68 | 59.48 | 65.97 | 66.73 | a | 65.82 | 60.86 | b | 48.48 | a | 32.24 | c | 18.91 | b | 40.56 | |||||||
1995 | 9.18 | 12.86 | 25.03 | 38.35 | 53.93 | a | 69.67 | 69.48 | 70.56 | 57.68 | 43.24 | 21.07 | b | 9.53 | a | 40.05 | ||||||||||
1996 | -2.75 | a | 10.57 | b | 16.90 | b | 37.18 | 53.22 | a | 67.58 | 67.02 | a | 69.08 | 57.71 | a | 44.65 | a | 15.42 | 3.88 | a | 36.70 | |||||
1997 | 0.73 | c | 13.09 | a | 20.22 | b | 38.02 | c | 52.94 | 68.03 | 69.27 | 67.37 | 61.02 | a | 47.69 | e | 23.26 | a | 23.87 | 40.46 | ||||||
1998 | 9.45 | 24.73 | 24.23 | 49.23 | 60.61 | 63.07 | a | 71.13 | 71.65 | a | 62.52 | 47.03 | 27.28 | 14.58 | a | 43.79 | ||||||||||
1999 | 4.33 | a | 19.79 | 28.47 | b | 43.55 | j | 57.39 | c | 66.27 | 69.15 | k | 68.45 | b | 55.08 | 44.53 | a | 36.17 | 22.79 | 40.33 | b | |||||
2000 | 9.66 | b | 19.85 | b | 34.33 | a | 40.32 | 56.27 | a | 61.72 | 68.63 | h | 68.73 | c | 55.91 | a | 45.87 | a | 24.67 | 0.67 | e | 38.00 | a | |||
2001 | 14.50 | r | 0.08 | i | 23.60 | b | 41.71 | a | 57.57 | a | 64.38 | 72.92 | g | 69.76 | b | 57.37 | 41.42 | a | 37.11 | b | 16.31 | 45.47 | c | |||
2002 | 13.55 | b | 21.86 | 16.50 | 37.40 | 48.73 | a | 66.86 | b | 71.00 | f | 65.98 | a | 60.50 | e | 34.88 | a | 27.12 | 18.48 | a | 37.44 | a | ||||
2003 | 7.08 | 5.94 | b | 22.87 | a | 43.58 | 53.67 | a | 64.30 | c | 68.15 | e | 70.85 | 56.53 | a | 46.68 | 22.76 | g | 18.88 | a | 41.69 | a | ||||
2004 | 0.60 | b | 10.89 | a | 26.32 | a | 42.62 | a | 50.27 | 60.23 | f | 67.58 | f | 60.60 | 58.85 | 43.90 | a | 32.72 | 15.55 | a | 34.23 | b | ||||
2005 | 2.38 | a | 15.65 | b | 24.77 | a | 47.53 | 52.75 | a | 65.87 | c | 70.22 | h | 64.78 | k | 59.61 | b | 45.11 | d | 29.77 | d | 14.93 | c | 35.84 | b | |
2006 | 21.79 | 8.28 | c | 25.52 | g | 47.83 | c | 58.52 | f | 66.45 | b | 75.20 | k | 68.03 | a | 56.43 | a | 40.44 | e | 27.59 | c | 22.02 | c | 39.87 | c | |
2007 | 8.52 | b | 3.40 | c | 27.93 | c | 41.05 | b | 56.75 | e | 66.88 | a | 71.85 | g | 65.07 | d | 58.27 | 47.42 | a | 28.88 | d | 8.25 | c | 37.49 | a | |
2008 | 1.96 | f | 3.48 | c | 21.15 | g | 38.70 | e | 52.75 | e | 61.32 | h | 68.90 | k | 67.84 | f | 56.98 | e | 44.54 | d | 28.63 | d | 3.08 | g | 37.51 | f |
2009 | -2.50 | i | 9.50 | b | 16.92 | f | 38.11 | c | 52.07 | h | 60.28 | g | 64.27 | r | 65.11 | d | 64.17 | g | 39.70 | k | 36.79 | f | 10.91 | o | 37.57 | i |
2010 | 3.17 | k | 5.91 | k | 31.64 | m | 48.52 | f | 53.32 | i | 64.02 | h | 70.52 | i | 72.15 | r | 52.50 | t | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 5.44 | 11.98 | 25.39 | 42.17 | 55.41 | 64.51 | 69.39 | 67.67 | 57.48 | 44.10 | 26.85 | 12.85 | 40.15 | |||||||||||||
S.D. | 7.58 | 6.98 | 5.66 | 4.24 | 3.60 | 3.10 | 2.90 | 3.08 | 3.01 | 3.43 | 5.23 | 6.29 | 1.91 | |||||||||||||
SKEW | 0.10 | 0.14 | 0.23 | 0.12 | 0.52 | 0.08 | -0.15 | 0.01 | -1.04 | -1.16 | -0.25 | -0.28 | 0.16 | |||||||||||||
MAX | 21.79 | 24.73 | 36.89 | 50.75 | 66.11 | 74.17 | 74.86 | 74.47 | 62.52 | 49.85 | 37.11 | 23.87 | 43.79 | |||||||||||||
MIN | -8.91 | -3.07 | 15.89 | 32.88 | 48.73 | 57.63 | 62.77 | 60.60 | 46.80 | 33.78 | 14.67 | -1.67 | 36.70 | |||||||||||||
YRS | 48 | 46 | 46 | 50 | 49 | 49 | 38 | 50 | 51 | 50 | 47 | 44 | 24 |