YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.67 | y | 15.96 | c | 8.83 | a | 12.40 | j |
1907 | -1.46 | c | 0.07 | 17.81 | 22.23 | 33.45 | 47.40 | 51.93 | d | 48.61 | c | 43.87 | 29.47 | a | 22.65 | d | 10.48 | d | 27.21 | |||||||
1908 | 3.00 | 8.34 | 15.23 | 31.23 | 41.93 | a | 47.53 | 52.96 | f | 47.65 | 46.13 | 35.23 | a | 23.20 | 6.68 | 27.83 | a | |||||||||
1909 | 2.26 | 6.65 | b | 15.23 | 25.33 | 41.43 | c | 49.74 | c | 52.42 | 55.97 | 43.77 | 31.77 | 26.77 | 4.35 | 29.64 | ||||||||||
1910 | -0.42 | -3.18 | 27.16 | 32.70 | 35.00 | b | 48.57 | 51.47 | a | 50.30 | a | 42.30 | 34.19 | 18.33 | 3.21 | b | 28.30 | |||||||||
1911 | -5.62 | b | 9.82 | 18.19 | 28.17 | 43.39 | 53.93 | 50.03 | 50.16 | 42.63 | 31.13 | 11.64 | b | 11.26 | 28.73 | |||||||||||
1912 | -21.71 | -3.69 | 5.33 | a | 30.70 | 40.47 | a | 43.60 | 53.10 | 49.32 | 44.07 | 32.42 | 19.26 | c | 7.60 | a | 25.04 | |||||||||
1913 | -3.65 | -3.86 | 9.45 | 31.90 | 38.61 | 49.80 | 53.35 | 53.58 | 42.13 | 31.87 | 26.67 | 15.13 | a | 28.75 | ||||||||||||
1914 | 8.87 | a | -11.00 | 13.42 | 28.43 | 42.52 | 49.76 | a | 55.94 | 50.17 | a | 42.79 | a | 36.74 | 19.70 | 0.16 | 28.12 | |||||||||
1915 | -4.13 | 14.19 | b | 16.29 | 36.80 | 37.74 | 45.37 | 50.74 | 46.16 | 43.79 | a | 34.32 | 22.52 | a | 9.26 | 29.42 | ||||||||||
1916 | -4.90 | -1.97 | 10.16 | 30.10 | 38.74 | 46.90 | 59.83 | b | 52.27 | a | 40.68 | b | 31.77 | 19.37 | -1.90 | 26.75 | ||||||||||
1917 | -9.39 | -10.18 | 13.00 | 27.00 | 35.35 | 45.87 | 53.93 | a | 46.57 | a | 40.63 | 25.90 | a | 25.50 | -3.68 | 24.21 | ||||||||||
1918 | -8.81 | -1.43 | 20.13 | a | 24.60 | 42.65 | 48.83 | 50.74 | 51.84 | 37.10 | 34.81 | 26.67 | 18.33 | a | 28.79 | |||||||||||
1919 | 8.74 | 3.96 | 15.10 | 29.82 | b | 39.32 | 56.92 | d | 55.00 | c | 51.16 | 45.76 | a | 29.71 | 15.43 | -4.74 | 28.85 | |||||||||
1920 | -9.55 | 1.72 | 14.97 | 24.37 | 38.35 | 49.30 | 50.84 | 47.10 | b | 43.20 | 37.37 | a | 20.97 | 12.35 | 27.58 | |||||||||||
1921 | 8.00 | f | 7.39 | 18.90 | 33.27 | 43.19 | 54.33 | 59.23 | 51.48 | 46.18 | b | 34.59 | b | 18.19 | c | 6.69 | b | 33.95 | a | |||||||
1922 | -5.57 | c | -4.64 | 17.48 | 31.03 | 47.81 | 51.03 | a | 52.37 | a | 53.30 | a | 44.73 | 33.97 | a | 30.93 | 2.50 | c | 29.58 | |||||||
1923 | 4.20 | a | -8.50 | 5.00 | 25.90 | 39.81 | 53.83 | 57.92 | e | 49.90 | 44.37 | 31.06 | 25.72 | a | 15.77 | a | 28.75 | |||||||||
1924 | -11.23 | a | 8.69 | 15.72 | b | 28.90 | 35.39 | 47.23 | 50.62 | b | 49.84 | 41.10 | 37.97 | a | 19.73 | -3.47 | a | 26.71 | ||||||||
1925 | -0.39 | 5.14 | 17.68 | 35.30 | c | 33.29 | 51.24 | a | 52.65 | 52.00 | 46.43 | 26.30 | a | 18.03 | 3.13 | 28.40 | ||||||||||
1926 | -2.32 | 6.07 | a | 8.45 | 25.17 | 41.74 | 46.00 | 54.42 | 52.80 | a | 43.11 | b | 32.81 | 15.10 | 0.27 | a | 26.97 | |||||||||
1927 | -3.87 | 7.25 | 22.32 | 30.40 | 41.65 | 44.82 | h | 51.29 | 46.80 | a | 49.87 | 36.45 | 22.53 | -2.62 | b | 27.46 | a | |||||||||
1928 | 3.67 | a | 8.39 | a | 17.03 | 25.20 | 43.52 | 47.30 | 55.71 | 53.74 | 42.87 | 37.48 | 26.63 | 12.97 | 31.21 | |||||||||||
1929 | -11.27 | a | -2.50 | 19.68 | 33.27 | 37.16 | 47.60 | 54.52 | 51.77 | 43.30 | 34.39 | 18.17 | 7.68 | 27.81 | ||||||||||||
1930 | -4.90 | b | 12.86 | 16.77 | a | 31.76 | a | 43.03 | 52.70 | 54.45 | 53.67 | a | 44.43 | 35.52 | 23.41 | a | 11.74 | 31.29 | ||||||||
1931 | 14.19 | 18.11 | 21.53 | a | 32.03 | 39.97 | 56.03 | 56.90 | 51.90 | a | 50.03 | 41.06 | 29.62 | a | 20.16 | 35.96 | ||||||||||
1932 | 9.84 | 5.30 | b | 9.29 | 29.70 | 43.74 | 53.77 | 56.52 | 54.13 | 41.63 | 32.90 | 17.90 | 3.10 | 29.82 | ||||||||||||
1933 | 8.19 | -2.43 | 17.97 | 30.83 | 43.90 | 57.21 | a | 57.90 | a | 50.77 | 49.77 | 31.83 | b | 18.70 | 3.07 | a | 30.64 | |||||||||
1934 | 10.03 | b | 2.21 | 13.90 | 30.80 | 47.23 | a | 54.30 | 55.35 | 50.48 | 43.47 | 37.87 | a | 28.31 | a | 2.93 | a | 31.41 | ||||||||
1935 | -4.16 | 11.57 | 19.19 | 30.50 | 39.45 | 48.07 | 60.90 | 55.59 | b | 44.97 | 33.67 | a | 20.04 | b | 8.14 | b | 30.66 | |||||||||
1936 | -3.94 | -12.69 | 18.37 | a | 25.73 | 45.13 | 47.77 | 58.55 | 56.29 | 48.97 | 30.90 | 18.45 | a | 10.03 | 28.63 | |||||||||||
1937 | -7.45 | 2.00 | a | 12.97 | 30.97 | a | 43.90 | 50.50 | 56.94 | 58.58 | 46.30 | 32.86 | c | 20.69 | a | 4.32 | 29.38 | |||||||||
1938 | 1.55 | 11.18 | 22.32 | 31.80 | 43.42 | 51.27 | 57.45 | 56.97 | 47.40 | 39.10 | a | 21.76 | a | 8.53 | a | 32.73 | ||||||||||
1939 | 8.48 | b | -3.72 | c | 14.94 | 27.62 | a | 44.77 | 52.70 | 55.39 | c | 53.33 | a | 47.82 | b | 34.07 | a | 22.67 | 17.81 | 31.32 | ||||||
1940 | -2.97 | 10.73 | c | 11.52 | d | 29.52 | a | 39.64 | c | 50.33 | c | 57.45 | 54.76 | b | 46.67 | c | 37.77 | 18.82 | b | 12.48 | b | 30.56 | ||||
1941 | 5.52 | 5.61 | 13.94 | 37.83 | 47.07 | a | 53.32 | e | 57.07 | a | 54.74 | 49.27 | 36.93 | c | 25.82 | b | 17.07 | a | 33.68 | |||||||
1942 | 7.72 | b | 9.33 | a | 25.45 | 35.40 | 42.13 | 52.43 | 55.32 | 54.68 | 43.93 | c | 34.48 | 19.14 | a | 7.00 | b | 32.25 | ||||||||
1943 | -2.70 | a | 4.70 | a | 9.23 | 28.43 | 41.55 | 55.40 | 57.97 | 55.81 | 41.77 | 35.26 | 18.60 | 9.39 | 29.62 | |||||||||||
1944 | 14.74 | 8.48 | 14.00 | 28.77 | 47.13 | a | 55.11 | b | 54.32 | 54.84 | 47.27 | 35.03 | 30.70 | 6.83 | a | 33.10 | ||||||||||
1945 | 2.30 | a | 5.75 | 26.13 | 30.70 | 37.17 | a | 46.33 | 53.84 | 53.52 | 45.03 | 32.87 | 21.97 | 4.81 | 30.03 | |||||||||||
1946 | 3.77 | 3.61 | 28.06 | 33.33 | 38.77 | 51.10 | 56.58 | 52.06 | 45.33 | 37.19 | 22.47 | 8.58 | 31.74 | |||||||||||||
1947 | 7.90 | 3.93 | 16.45 | 28.80 | 37.55 | 47.80 | 54.55 | 59.65 | 47.53 | 44.17 | a | 14.96 | c | 8.50 | a | 30.98 | ||||||||||
1948 | -5.37 | a | 1.21 | a | 13.53 | a | 33.69 | a | 39.79 | b | 51.60 | 57.13 | 54.81 | 47.13 | 34.03 | 27.27 | 7.45 | 30.19 | ||||||||
1949 | 5.87 | 2.89 | a | 16.52 | 30.93 | 43.55 | 55.07 | 59.03 | 54.97 | 42.30 | 37.58 | 25.47 | 8.55 | 31.89 | ||||||||||||
1950 | -5.97 | 3.71 | 11.71 | 24.63 | 40.16 | 50.13 | 52.84 | 48.35 | 45.40 | 38.77 | 17.77 | 1.81 | 27.44 | |||||||||||||
1951 | 0.26 | 6.50 | b | ----- | z | 32.18 | h | 45.13 | 46.25 | f | 55.90 | 53.39 | 43.93 | 35.97 | 17.31 | n | 4.96 | c | 30.76 | d | ||||||
1952 | 3.35 | 12.52 | 16.03 | 35.77 | 41.19 | e | ----- | z | 55.38 | o | 52.45 | 43.87 | 26.65 | 22.03 | 16.16 | 27.00 | b | |||||||||
1953 | 7.48 | 4.04 | 18.90 | 28.83 | 41.26 | 53.40 | 54.68 | 54.90 | 43.53 | 37.65 | 24.50 | 8.97 | 31.51 | |||||||||||||
1954 | -1.65 | 17.82 | 15.10 | 30.67 | 37.65 | 54.70 | 57.74 | 53.13 | 46.40 | 34.97 | 25.73 | 13.00 | 32.10 | |||||||||||||
1955 | 0.52 | 1.50 | 11.19 | 38.40 | 43.87 | 50.90 | 60.32 | 58.10 | 45.33 | 36.29 | 16.30 | 1.06 | 30.32 | |||||||||||||
1956 | 1.97 | 0.17 | 12.35 | 29.10 | 41.32 | 54.60 | 54.16 | 54.35 | 41.60 | 38.65 | 22.70 | 10.39 | 30.11 | |||||||||||||
1957 | -5.87 | 6.75 | 16.23 | 31.43 | 40.71 | 51.80 | 59.32 | 53.77 | 42.93 | 34.29 | 23.03 | 10.03 | 30.37 | |||||||||||||
1958 | 10.06 | 2.25 | 20.48 | 31.87 | 39.94 | 45.40 | 53.35 | 52.19 | 46.90 | 37.58 | 22.83 | 1.23 | 30.34 | |||||||||||||
1959 | -4.97 | 1.64 | 17.71 | 31.57 | 44.55 | 52.00 | 54.16 | 59.61 | 47.63 | 33.87 | 13.40 | 19.19 | 30.86 | |||||||||||||
1960 | 6.19 | 7.31 | 6.90 | 32.80 | 43.06 | 48.53 | 53.65 | 56.68 | 48.70 | 35.48 | 25.57 | 6.23 | 30.93 | |||||||||||||
1961 | 1.42 | 12.54 | 23.13 | 28.60 | 38.55 | 50.97 | 54.52 | 54.61 | 45.53 | 35.61 | 21.67 | 7.55 | 31.22 | |||||||||||||
1962 | -1.87 | 4.54 | 19.16 | 30.63 | 48.19 | 50.63 | 53.39 | 52.84 | 43.40 | 38.48 | 25.43 | 8.48 | 31.11 | |||||||||||||
1963 | -6.94 | -1.43 | 19.97 | 33.10 | 39.77 | 51.70 | 55.71 | 52.52 | 47.77 | 43.39 | 26.80 | 1.26 | 30.30 | |||||||||||||
1964 | 8.39 | 7.45 | 14.58 | 32.17 | 44.81 | 49.90 | 56.61 | 51.61 | 46.13 | 34.06 | 24.93 | 1.81 | 31.04 | |||||||||||||
1965 | -4.39 | -1.25 | 9.35 | 30.87 | 46.23 | 49.77 | 53.19 | 52.00 | 42.50 | 35.74 | 22.87 | 16.35 | 29.44 | |||||||||||||
1966 | -8.42 | 4.50 | 22.23 | 29.50 | 36.19 | 50.37 | 57.23 | 51.77 | 44.03 | 33.81 | 22.40 | 8.00 | 29.30 | |||||||||||||
1967 | 4.29 | -5.04 | 16.42 | 31.93 | 35.52 | 51.90 | 53.19 | 48.87 | 42.73 | 33.71 | 20.37 | 9.39 | 28.61 | |||||||||||||
1968 | 1.23 | 1.45 | 23.13 | 32.00 | 40.13 | 51.40 | 55.35 | 53.61 | 46.40 | 39.06 | 23.20 | 6.48 | 31.12 | |||||||||||||
1969 | 0.26 | 7.50 | 11.71 | 33.97 | 42.35 | 45.53 | 55.68 | 54.29 | 44.83 | 33.32 | 21.73 | 11.94 | 30.26 | |||||||||||||
1970 | -4.35 | 0.18 | 12.29 | 32.23 | 44.23 | 53.70 | 57.03 | 53.00 | 46.43 | 38.16 | 23.73 | 9.35 | 30.50 | |||||||||||||
1971 | -4.19 | 5.18 | 15.19 | 28.97 | 37.74 | 55.17 | 51.94 | 50.32 | 47.63 | 42.94 | 25.59 | c | 9.73 | a | 30.52 | |||||||||||
1972 | -7.10 | -1.14 | a | 14.00 | 28.17 | 45.97 | 48.80 | 54.06 | 53.10 | 43.17 | 30.61 | 24.24 | a | 1.54 | c | 27.95 | ||||||||||
1973 | 4.35 | 8.11 | 28.94 | 28.86 | a | 39.97 | 50.40 | 53.74 | 54.63 | d | 44.37 | 36.13 | a | 20.67 | c | 5.36 | c | 31.29 | ||||||||
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | 26.27 | 44.97 | 52.04 | b | 57.10 | a | 51.52 | ----- | z | 30.13 | a | 22.80 | e | 1.52 | f | 40.69 | e | |||
1976 | -9.23 | 7.28 | 11.71 | 28.67 | 38.30 | a | 53.61 | b | 55.79 | b | 52.65 | 42.57 | 29.77 | 15.30 | c | -4.11 | c | 26.86 | ||||||||
1977 | -9.61 | 8.89 | 27.06 | 38.18 | b | 48.84 | 49.08 | f | 59.16 | 49.45 | 47.12 | d | 33.45 | 22.25 | b | 6.68 | c | 30.13 | a | |||||||
1978 | -4.13 | -0.30 | a | 14.94 | 30.89 | b | 42.52 | 50.93 | a | 54.94 | 52.94 | 46.93 | 32.60 | a | 18.73 | 1.14 | b | 28.51 | ||||||||
1979 | -8.97 | -2.46 | 17.13 | 28.86 | a | 39.39 | 48.93 | b | 54.38 | b | 53.16 | 46.80 | 34.62 | j | 20.59 | a | 11.23 | 28.09 | a | |||||||
1980 | -0.19 | -0.96 | d | 13.65 | 33.67 | 42.82 | c | 49.23 | 57.45 | 52.93 | a | 43.03 | 27.73 | e | 19.87 | 4.35 | 28.63 | |||||||||
1981 | -0.45 | 7.52 | a | 17.71 | 28.64 | b | 34.12 | f | 49.14 | b | 52.94 | 55.45 | 45.31 | a | 33.13 | 24.53 | 6.57 | a | 29.14 | a | ||||||
1982 | -11.66 | b | 3.39 | 17.55 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.10 | i | |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | -0.57 | a | 16.66 | 13.74 | 35.03 | 38.43 | a | 53.20 | 52.26 | 54.45 | 38.73 | 36.68 | 17.63 | 3.87 | 30.01 | |||||||||||
1985 | -3.65 | 0.43 | 19.42 | 32.37 | 41.52 | 41.90 | 48.65 | 46.45 | 40.50 | 28.84 | 11.40 | -9.94 | 24.82 | |||||||||||||
1986 | -1.81 | -3.21 | 15.03 | 29.97 | 39.39 | 43.00 | 50.10 | 42.00 | 38.90 | 26.48 | 10.17 | 3.23 | 24.44 | |||||||||||||
1987 | -0.97 | 7.11 | 15.61 | 27.30 | 37.94 | 45.87 | 59.03 | 54.35 | 45.73 | 29.74 | 25.73 | 16.58 | 30.34 | |||||||||||||
1988 | -2.45 | -1.97 | 19.16 | 29.57 | 43.68 | 50.70 | 55.74 | 55.74 | 44.93 | 27.58 | 23.90 | 5.58 | 29.35 | |||||||||||||
1989 | 7.41 | b | -3.39 | 13.94 | 29.60 | 41.23 | a | 49.60 | 56.74 | 54.03 | 42.27 | 32.87 | 17.40 | -3.03 | 28.22 | |||||||||||
1990 | 11.61 | 5.43 | 20.26 | 31.80 | 38.55 | 52.40 | 54.29 | 52.81 | 47.23 | 30.81 | 22.60 | 4.26 | 31.00 | |||||||||||||
1991 | -2.94 | 6.18 | 17.65 | 30.77 | 45.71 | 53.50 | 53.74 | 52.58 | 42.57 | 29.52 | 12.97 | 5.06 | 28.94 | |||||||||||||
1992 | 6.13 | 13.48 | 16.48 | 26.27 | 39.32 | 48.73 | 51.74 | 50.58 | 45.20 | 35.16 | 25.07 | 11.16 | 30.78 | |||||||||||||
1993 | 4.94 | 7.50 | 17.90 | 30.53 | 44.45 | 50.37 | 58.06 | 56.58 | 40.70 | 33.06 | 20.90 | 13.52 | 31.54 | |||||||||||||
1994 | -7.35 | 1.07 | 22.32 | 30.87 | 43.26 | 53.83 | 56.10 | 53.03 | 50.80 | 39.67 | a | 27.50 | 14.65 | 32.14 | ||||||||||||
1995 | 8.03 | 5.89 | 22.03 | 29.20 | 42.65 | 56.23 | 58.48 | 61.55 | 45.17 | 37.71 | 15.80 | 6.23 | a | 32.41 | ||||||||||||
1996 | -3.19 | 4.59 | 11.74 | 28.17 | 41.39 | 54.53 | 54.97 | 55.00 | 48.23 | 36.19 | 16.80 | 6.71 | 29.59 | |||||||||||||
1997 | 1.52 | 11.18 | 19.42 | 29.67 | 38.90 | 53.33 | 57.23 | 53.97 | 49.40 | 36.94 | 21.47 | 18.97 | 32.67 | |||||||||||||
1998 | 11.68 | 23.79 | 22.77 | 36.40 | 48.71 | 51.77 | 56.94 | 57.19 | 50.17 | 38.35 | 28.43 | 11.84 | 36.50 | |||||||||||||
1999 | 2.87 | 16.39 | 20.29 | 36.57 | 47.06 | 53.17 | 61.52 | 56.33 | a | 46.14 | b | 34.48 | 27.97 | 13.16 | 34.66 | |||||||||||
2000 | 3.55 | 14.17 | 27.23 | 31.63 | 45.52 | 51.77 | 57.61 | 57.45 | 45.10 | 39.23 | 24.83 | -1.26 | 33.07 | |||||||||||||
2001 | 9.03 | 1.32 | 17.87 | 36.27 | 45.48 | 52.67 | c | 56.48 | 58.29 | 46.83 | 35.63 | a | 32.93 | 18.87 | 34.31 | |||||||||||
2002 | 15.13 | 17.79 | 14.00 | 32.07 | 38.97 | 56.33 | 61.39 | 56.16 | 49.37 | 33.29 | 22.27 | 15.53 | a | 34.36 | ||||||||||||
2003 | 4.06 | 1.61 | 17.65 | 32.03 | 42.29 | 51.60 | 56.71 | 57.81 | 46.60 | 35.32 | ----- | z | ----- | z | 34.57 | b | ||||||||||
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | 42.90 | a | 47.45 | a | 56.23 | 54.00 | 40.73 | 27.97 | 23.86 | a | 16.48 | 38.70 | d | |||||
2007 | 7.00 | -2.21 | 23.57 | h | 32.38 | d | 43.56 | o | 54.10 | t | 56.53 | p | 55.82 | t | 47.00 | y | ----- | z | ----- | z | ----- | z | 12.39 | i | ||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.16 | 4.33 | 16.74 | 30.65 | 41.53 | 50.80 | 55.32 | 53.08 | 44.89 | 34.41 | 21.78 | 7.54 | 30.08 | |||||||||||||
S.D. | 6.92 | 6.69 | 4.92 | 3.21 | 3.46 | 3.25 | 2.73 | 3.24 | 2.77 | 3.74 | 4.49 | 6.20 | 2.33 | |||||||||||||
SKEW | -0.07 | 0.14 | 0.21 | 0.10 | -0.06 | -0.34 | -0.02 | -0.38 | -0.14 | -0.07 | -0.21 | -0.12 | 0.01 | |||||||||||||
MAX | 15.13 | 23.79 | 28.94 | 38.40 | 48.84 | 57.21 | 61.52 | 61.55 | 50.80 | 44.17 | 32.93 | 20.16 | 36.50 | |||||||||||||
MIN | -21.71 | -12.69 | 5.00 | 22.23 | 33.29 | 41.90 | 48.65 | 42.00 | 37.10 | 25.90 | 10.17 | -9.94 | 24.21 | |||||||||||||
YRS | 94 | 95 | 93 | 94 | 94 | 91 | 93 | 95 | 94 | 94 | 94 | 94 | 84 |