YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 39.16 | 32.10 | 24.81 | 11.00 | -2.42 | 20.93 | g | |||||
1964 | -8.81 | -9.34 | -1.13 | a | 14.80 | 23.23 | 28.43 | 37.35 | 34.68 | 28.07 | 19.00 | 9.60 | 0.29 | 14.68 | ||||||||||||
1965 | 2.03 | -4.57 | 3.68 | 17.83 | 24.29 | 29.43 | 37.71 | 34.03 | 27.90 | 19.94 | 13.33 | 2.94 | 17.38 | |||||||||||||
1966 | -10.23 | -7.46 | 5.74 | 16.80 | 24.42 | 29.93 | 38.23 | 34.23 | 27.20 | 19.32 | 12.07 | -1.23 | 15.75 | |||||||||||||
1967 | -1.00 | -1.93 | 12.00 | 18.00 | 23.29 | 30.20 | 37.48 | 33.94 | 29.13 | 18.90 | 9.77 | -1.39 | 17.37 | |||||||||||||
1968 | -3.33 | a | 2.14 | 4.77 | 13.53 | 22.55 | 28.47 | 36.13 | 34.90 | 24.37 | 18.65 | 5.33 | -2.81 | 15.39 | ||||||||||||
1969 | 3.00 | -3.29 | -0.10 | 18.10 | 26.45 | 29.33 | 37.55 | 38.74 | 30.30 | 16.32 | 3.87 | 1.61 | 16.82 | |||||||||||||
1970 | -4.00 | 3.71 | 3.77 | a | 9.80 | 21.39 | 28.43 | 35.45 | 38.19 | 27.23 | 16.77 | 12.50 | 0.03 | 16.11 | ||||||||||||
1971 | 1.94 | -0.82 | 3.39 | 15.70 | 22.97 | 30.07 | 34.65 | 36.87 | 25.80 | 21.81 | 9.33 | -0.48 | 16.77 | |||||||||||||
1972 | -2.71 | 0.07 | 12.90 | 17.97 | 23.87 | 32.83 | 34.58 | 34.71 | 29.30 | 27.26 | 5.97 | -5.19 | 17.63 | |||||||||||||
1973 | -6.00 | -2.71 | 7.77 | 11.60 | 24.84 | 30.73 | 35.19 | 34.94 | 28.20 | 19.16 | 14.69 | a | -0.29 | 16.51 | ||||||||||||
1974 | -3.90 | -7.50 | 12.90 | 15.00 | 24.90 | 30.97 | 37.52 | 31.10 | 28.03 | 23.13 | a | 5.33 | -7.13 | 15.86 | ||||||||||||
1975 | -6.10 | -3.82 | 8.23 | 12.93 | 23.65 | 27.20 | 35.87 | 33.27 | i | 27.63 | 16.06 | 8.13 | -0.55 | 13.57 | a | |||||||||||
1976 | -7.26 | 5.31 | 2.68 | 16.87 | 26.61 | 28.90 | 37.03 | 34.84 | 31.20 | 16.81 | ----- | z | ----- | z | 19.30 | b | ||||||||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.35 | 30.97 | 20.87 | 11.40 | 3.84 | 20.89 | g | |||||
1978 | 1.10 | 1.00 | 12.48 | 19.13 | 25.42 | 30.67 | 35.35 | 33.39 | 27.97 | 19.74 | 10.77 | -6.35 | 17.56 | |||||||||||||
1979 | -6.61 | -2.61 | 8.19 | 16.87 | 26.13 | 29.40 | 35.03 | 34.52 | 27.70 | 19.97 | -1.83 | -0.16 | 15.55 | |||||||||||||
1980 | 2.94 | 0.14 | 4.32 | 11.27 | 25.42 | 29.07 | 36.26 | 35.39 | 29.17 | 17.61 | 8.57 | 8.94 | 17.42 | |||||||||||||
1981 | 2.42 | 0.75 | 10.42 | 20.27 | 27.55 | 32.87 | 39.17 | b | 37.03 | a | 30.83 | 22.62 | b | 12.67 | 3.59 | b | 20.02 | |||||||||
1982 | -2.61 | -1.54 | 8.78 | d | 15.63 | c | 24.27 | a | 29.50 | 35.31 | e | 40.73 | e | 31.70 | c | 18.68 | f | 7.52 | e | 1.40 | f | 18.93 | b | |||
1983 | 0.21 | g | 2.96 | e | 10.59 | b | 9.71 | f | 22.62 | b | 30.17 | f | 36.29 | g | 39.43 | a | 29.19 | d | 23.12 | g | 7.96 | c | 2.14 | i | 18.79 | f |
1984 | -13.28 | f | -7.00 | e | 0.88 | e | 12.00 | f | 26.67 | g | 33.08 | d | 37.92 | f | 36.88 | g | 31.61 | b | 18.70 | d | 9.85 | j | -1.41 | d | 12.64 | f |
1985 | -5.76 | f | -7.55 | f | 7.96 | d | 18.20 | e | 26.79 | c | 31.19 | d | 36.46 | g | 32.62 | g | 27.85 | d | 19.75 | k | 8.15 | j | -0.96 | f | 22.40 | g |
1986 | 0.58 | l | -4.00 | v | 2.10 | j | 17.58 | k | 24.61 | h | 31.45 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -2.73 | -1.83 | 6.68 | 15.81 | 24.53 | 30.04 | 36.44 | 35.91 | 28.85 | 19.87 | 8.90 | -0.43 | 16.72 | |||||||||||||
S.D. | 4.25 | 4.01 | 4.33 | 2.87 | 1.64 | 1.58 | 1.35 | 2.43 | 1.96 | 2.89 | 3.87 | 3.75 | 1.29 | |||||||||||||
SKEW | -0.08 | -0.17 | -0.12 | -0.57 | 0.07 | 0.51 | 0.30 | 0.28 | -0.13 | 0.92 | -0.97 | 0.40 | 0.83 | |||||||||||||
MAX | 3.00 | 5.31 | 12.90 | 20.27 | 27.55 | 33.08 | 39.17 | 40.73 | 32.10 | 27.26 | 14.69 | 8.94 | 20.02 | |||||||||||||
MIN | -10.23 | -9.34 | -1.13 | 9.80 | 21.39 | 27.20 | 34.58 | 31.10 | 24.37 | 16.06 | -1.83 | -7.13 | 14.68 | |||||||||||||
YRS | 18 | 20 | 21 | 19 | 20 | 20 | 18 | 20 | 23 | 20 | 20 | 19 | 15 |