YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | 14.79 | g | 11.21 | 15.48 | 23.90 | a | 29.58 | 41.10 | a | 48.90 | 49.03 | 38.77 | 27.87 | 19.47 | -3.97 | a | 27.40 | a | ||||||||
1910 | 10.39 | 6.32 | 20.71 | 26.40 | 33.81 | 41.63 | 46.06 | 44.26 | 38.37 | 25.23 | 18.47 | 8.08 | f | 28.33 | a | |||||||||||
1911 | 13.47 | a | 13.82 | 21.87 | 28.30 | 33.52 | 40.93 | 49.03 | 42.39 | ----- | z | ----- | z | ----- | z | ----- | z | 30.42 | d | |||||||
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.55 | 11.83 | -0.10 | 12.76 | i | |||
1913 | -0.81 | 9.23 | b | 15.97 | 24.34 | a | 32.84 | 41.30 | 46.57 | a | 45.94 | 35.80 | 26.52 | 21.83 | -5.50 | a | 24.50 | |||||||||
1914 | 6.16 | 10.18 | 17.77 | a | ----- | z | 36.14 | j | 42.10 | 47.90 | 44.13 | 39.17 | 28.23 | 12.80 | 3.74 | 25.22 | b | |||||||||
1915 | -2.35 | h | 11.04 | b | 16.87 | 31.45 | a | 32.35 | 40.93 | 45.87 | 44.61 | 37.43 | 24.48 | 13.40 | 6.58 | 27.73 | a | |||||||||
1916 | 13.03 | a | 11.10 | 20.52 | 27.59 | a | 31.13 | 37.93 | 48.06 | 46.17 | a | 36.87 | 30.32 | 13.40 | 3.84 | 26.66 | ||||||||||
1917 | 3.36 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.36 | k |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 25.35 | d | 34.94 | m | 39.62 | a | 48.03 | 44.65 | 37.93 | a | 28.73 | a | 11.43 | 7.52 | 30.41 | d | ||||
1926 | -7.03 | a | 13.14 | 18.43 | a | 28.60 | 33.10 | 40.63 | 45.39 | 42.81 | 39.52 | c | 26.57 | c | 18.40 | 7.19 | 25.56 | |||||||||
1927 | 11.20 | a | 17.67 | a | 18.93 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.93 | i |
1928 | 4.00 | w | 10.97 | 21.87 | a | 25.93 | 35.00 | 42.53 | 45.16 | 43.90 | 35.97 | 28.77 | 10.90 | -1.23 | 27.25 | a | ||||||||||
1929 | -5.16 | -4.04 | 6.03 | ----- | z | ----- | z | 30.77 | 38.97 | ----- | z | ----- | z | ----- | z | -4.69 | a | -1.43 | a | 8.64 | e | |||||
1930 | -9.90 | a | 3.36 | ----- | z | ----- | z | 27.06 | ----- | z | 39.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.94 | h | |||
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 | 29.00 | o | 31.45 | 42.87 | 45.77 | 45.00 | 36.70 | 26.26 | 15.07 | 4.00 | 30.89 | d | ||||||||
1961 | -4.45 | 8.36 | 18.13 | 23.47 | 33.90 | 40.70 | 45.26 | 46.65 | 35.69 | a | 23.74 | 13.83 | -0.87 | 23.70 | ||||||||||||
1962 | 0.90 | 14.36 | 10.29 | 26.73 | 27.26 | 37.87 | 43.77 | 40.26 | 38.60 | 28.10 | 18.10 | 11.58 | 24.82 | |||||||||||||
1963 | -2.45 | 10.75 | 16.84 | 25.00 | 35.45 | 40.50 | 49.20 | a | 46.84 | 39.52 | a | 30.16 | 13.67 | 0.58 | 25.50 | |||||||||||
1964 | -2.13 | 1.59 | 7.65 | 20.80 | 33.23 | 39.90 | 46.13 | 43.10 | 38.77 | 25.48 | 11.63 | -2.74 | 21.95 | |||||||||||||
1965 | 6.58 | 7.36 | 12.10 | 23.20 | 32.58 | 41.60 | 48.74 | 42.55 | 37.43 | 26.35 | 19.33 | 7.97 | 25.48 | |||||||||||||
1966 | -3.10 | a | 1.04 | 15.26 | 25.41 | a | 32.81 | 39.47 | 48.97 | 44.39 | 34.87 | 25.03 | 15.93 | 5.81 | 23.82 | |||||||||||
1967 | 3.10 | 6.57 | 19.65 | 23.48 | a | 29.81 | 40.57 | 49.27 | a | 42.74 | 37.07 | 24.10 | 16.20 | 2.61 | 24.60 | |||||||||||
1968 | -3.45 | 10.59 | 15.26 | 21.10 | 32.90 | 41.33 | 45.67 | a | 45.81 | 35.10 | 26.35 | 15.97 | 3.52 | 24.18 | ||||||||||||
1969 | 12.16 | 9.89 | 14.16 | 27.03 | 34.26 | 40.03 | 50.10 | 49.19 | 37.57 | 26.55 | 13.67 | 5.00 | a | 26.63 | ||||||||||||
1970 | 3.10 | 11.14 | 14.58 | 18.87 | 31.29 | 38.47 | 47.68 | 46.29 | 35.00 | 23.97 | 17.07 | 5.16 | 24.38 | |||||||||||||
1971 | 2.48 | 8.57 | 12.48 | 20.73 | 27.10 | 37.30 | 45.42 | 46.97 | 35.17 | 25.03 | 14.23 | 6.65 | 23.51 | |||||||||||||
1972 | 5.55 | 13.96 | a | 20.26 | 26.73 | 33.55 | 42.73 | 47.87 | 44.19 | 37.07 | 32.37 | a | 8.40 | -0.70 | a | 26.00 | ||||||||||
1973 | -7.63 | a | 2.43 | 20.19 | 22.93 | 33.52 | 40.57 | 44.39 | 43.61 | c | 33.48 | a | 24.76 | b | 17.17 | 1.10 | 23.04 | |||||||||
1974 | -4.32 | c | -4.42 | b | 18.07 | c | 18.77 | 34.42 | 41.23 | 43.32 | 40.43 | a | 33.61 | b | 26.89 | d | 10.32 | b | -6.43 | a | 20.99 | |||||
1975 | -10.71 | 6.18 | 16.21 | c | 20.43 | 29.35 | 38.07 | a | 45.03 | 40.13 | a | 31.34 | a | 16.11 | d | 9.63 | 2.41 | i | 21.98 | a | ||||||
1976 | -3.77 | 10.97 | 13.77 | 23.46 | b | 35.29 | 41.50 | 48.71 | c | 43.68 | 39.17 | 22.48 | 11.70 | -0.38 | b | 23.88 | ||||||||||
1977 | -2.74 | 6.75 | 15.26 | 28.60 | 34.86 | b | 44.07 | a | 49.87 | a | 47.94 | 37.90 | 24.16 | 17.03 | 9.35 | 26.09 | ||||||||||
1978 | 9.65 | 10.96 | 21.52 | 25.63 | 32.39 | 42.13 | 45.97 | 42.29 | 37.62 | d | 28.29 | 20.80 | -2.90 | 26.19 | ||||||||||||
1979 | -5.67 | a | -0.07 | 17.96 | h | 27.73 | 35.90 | 40.11 | b | 45.35 | 43.97 | 36.80 | 26.29 | 7.10 | 3.97 | 23.77 | a | |||||||||
1980 | 11.29 | 15.28 | 16.86 | c | 24.67 | 34.16 | 43.10 | a | 49.33 | a | 47.00 | 39.30 | 24.52 | 13.46 | b | 13.10 | 27.67 | |||||||||
1981 | 7.26 | 9.61 | 19.52 | b | 31.55 | a | 34.23 | 46.56 | c | 49.77 | 47.86 | i | ----- | z | 27.93 | a | 18.59 | h | 10.53 | p | 28.30 | d | ||||
1982 | 5.68 | i | 7.85 | a | 20.23 | 25.00 | a | 32.70 | a | 40.97 | a | 47.42 | 49.23 | a | 41.62 | a | 24.77 | a | 17.93 | a | 7.10 | a | 28.62 | a | ||
1983 | 2.56 | o | 14.25 | 22.29 | 22.47 | 31.53 | a | 40.59 | a | 49.26 | 47.87 | a | 39.77 | 25.84 | 13.00 | 5.80 | a | 28.42 | a | |||||||
1984 | -11.30 | d | -4.07 | a | 14.60 | a | 22.50 | 36.55 | 41.30 | 49.74 | 47.29 | 39.79 | a | 26.45 | 13.41 | a | 10.29 | 23.88 | ||||||||
1985 | 1.33 | a | 7.63 | a | 20.32 | 27.90 | 35.45 | b | 41.17 | f | 47.42 | 45.35 | 34.23 | 27.00 | b | 17.70 | 4.03 | 24.40 | a | |||||||
1986 | 8.39 | 13.54 | 19.30 | a | 28.10 | a | 33.19 | 43.90 | 45.54 | c | 44.11 | d | 36.20 | 25.39 | 16.54 | b | 3.26 | d | 26.45 | |||||||
1987 | 1.10 | b | 11.61 | 17.00 | b | 24.70 | 33.74 | 43.93 | 47.00 | 45.14 | b | 34.07 | a | 26.47 | a | 13.82 | h | 2.52 | b | 26.12 | a | |||||
1988 | -8.13 | 4.66 | 14.33 | a | 25.00 | v | 32.10 | 43.30 | 46.45 | 46.97 | 33.73 | 26.16 | 13.53 | 1.80 | a | 23.17 | a | |||||||||
1989 | -1.29 | 8.61 | 18.61 | c | 24.77 | 35.39 | 41.59 | a | 50.07 | a | 46.52 | 41.38 | d | 26.23 | 15.72 | a | 2.81 | d | 25.87 | |||||||
1990 | 1.53 | a | 9.18 | 22.65 | 29.87 | 33.61 | 44.90 | 48.32 | 45.19 | 43.03 | 27.03 | 17.17 | 0.20 | a | 26.89 | |||||||||||
1991 | -1.48 | b | 11.39 | 19.97 | 23.43 | 34.19 | 41.67 | 48.97 | 47.52 | 38.50 | 27.65 | 10.30 | c | -6.39 | c | 24.64 | ||||||||||
1992 | -10.55 | 0.97 | 19.52 | 29.30 | 38.84 | 42.17 | 46.65 | 43.90 | 38.43 | 28.97 | 10.48 | a | -2.35 | 23.86 | ||||||||||||
1993 | 1.62 | b | 10.54 | 19.71 | 25.10 | 35.29 | 42.60 | 47.06 | 47.00 | a | 36.67 | 24.77 | 11.14 | b | 3.57 | a | 25.42 | |||||||||
1994 | 5.03 | 6.52 | a | 19.00 | 26.85 | c | 36.58 | 45.00 | 47.81 | 48.45 | k | 37.69 | n | 27.93 | a | 13.53 | 9.16 | 23.74 | b | |||||||
1995 | 11.10 | 19.43 | 20.93 | a | 24.53 | 32.37 | a | 41.17 | 44.97 | a | 49.32 | 39.93 | 23.58 | 17.67 | 10.20 | a | 27.93 | |||||||||
1996 | 4.67 | a | 14.17 | 16.90 | 25.13 | 38.74 | 44.77 | 51.23 | 48.35 | 37.69 | a | 25.61 | 18.07 | 7.61 | 27.75 | |||||||||||
1997 | 5.20 | a | 12.50 | b | 19.58 | 23.77 | 35.94 | 43.63 | 47.42 | 48.33 | a | 43.37 | 27.26 | 15.50 | -1.74 | 26.73 | ||||||||||
1998 | 3.71 | 13.39 | 20.17 | a | 23.97 | 33.42 | 41.52 | a | 50.80 | a | 47.26 | 41.23 | 29.26 | 19.83 | a | 9.29 | 27.82 | |||||||||
1999 | 11.81 | 12.89 | 21.77 | 24.33 | 34.29 | 41.23 | 51.27 | a | 48.03 | a | 37.77 | 23.94 | 14.30 | 4.45 | 27.17 | |||||||||||
2000 | 9.86 | b | 14.37 | b | 20.29 | 29.07 | 37.68 | 45.90 | 48.26 | 48.32 | 38.83 | 29.60 | a | 11.10 | 9.33 | a | 28.55 | |||||||||
2001 | 1.79 | b | 12.70 | a | 22.13 | 28.57 | 35.71 | 43.80 | 49.71 | 45.45 | 39.00 | 27.26 | 17.00 | 4.39 | 27.29 | |||||||||||
2002 | 1.39 | c | 5.22 | a | 14.60 | a | 30.20 | 35.52 | 47.13 | 49.55 | 46.07 | b | 40.27 | 27.94 | 16.00 | f | 6.68 | c | 27.69 | a | ||||||
2003 | 10.00 | 12.86 | 20.24 | b | 27.42 | d | 35.68 | 42.83 | 51.39 | c | 48.10 | a | 35.97 | a | 29.16 | 12.48 | e | 2.61 | 27.40 | |||||||
2004 | 2.25 | c | -0.09 | f | 23.68 | 25.43 | b | 35.94 | 44.00 | b | 45.45 | 44.38 | b | ----- | z | ----- | z | ----- | z | ----- | z | 31.59 | e | |||
2005 | ----- | z | ----- | z | 19.93 | q | 27.04 | f | 35.90 | 42.17 | 49.23 | 46.97 | 41.10 | a | 31.16 | 16.73 | 6.71 | 33.75 | d | |||||||
2006 | 4.68 | 9.46 | 20.65 | 26.54 | b | 35.35 | 45.20 | 50.71 | 49.20 | a | 34.72 | a | 25.29 | 15.35 | d | 3.07 | a | 26.68 | ||||||||
2007 | -2.90 | 11.78 | a | 19.84 | 27.50 | 36.06 | 40.67 | c | 47.74 | h | 45.48 | h | 41.04 | g | 25.53 | a | 11.20 | 0.23 | 18.88 | c | ||||||
2008 | -4.17 | h | 5.83 | 13.83 | a | 21.53 | 28.33 | d | 37.00 | e | 45.03 | a | 46.21 | b | 35.96 | b | 27.63 | a | 18.38 | a | 10.90 | 26.42 | a | |||
2009 | 6.43 | a | 11.37 | a | 23.45 | 25.07 | a | 39.03 | 41.10 | 46.97 | 44.43 | a | 36.30 | 25.90 | b | 14.47 | -0.42 | 26.18 | ||||||||
2010 | 4.39 | 6.72 | c | 15.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 5.55 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.91 | 9.02 | 17.90 | 25.38 | 33.68 | 41.57 | 47.35 | 45.57 | 37.58 | 26.47 | 14.39 | 3.48 | 25.52 | |||||||||||||
S.D. | 6.69 | 5.06 | 3.70 | 2.93 | 2.68 | 2.59 | 2.52 | 2.33 | 2.48 | 2.42 | 4.14 | 4.66 | 1.75 | |||||||||||||
SKEW | -0.14 | -0.85 | -1.01 | -0.11 | -0.56 | -1.00 | -0.99 | -0.36 | 0.03 | -0.94 | -1.64 | -0.15 | -0.46 | |||||||||||||
MAX | 13.47 | 19.43 | 23.68 | 31.55 | 39.03 | 47.13 | 51.39 | 49.32 | 43.37 | 32.37 | 21.83 | 13.10 | 28.55 | |||||||||||||
MIN | -11.30 | -4.42 | 6.03 | 18.77 | 27.06 | 30.77 | 38.97 | 40.13 | 31.34 | 16.11 | -4.69 | -6.43 | 20.99 | |||||||||||||
YRS | 56 | 60 | 58 | 56 | 59 | 60 | 61 | 57 | 55 | 59 | 57 | 57 | 38 |