YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.86 | b | 42.57 | j | 34.83 | g | 21.81 | 12.37 | 0.45 | 19.62 | h | |||
1929 | 14.73 | a | 10.25 | -6.10 | 12.48 | e | 33.19 | 44.00 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.91 | g | |||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.78 | h | 12.77 | -9.39 | 1.69 | j | ||
1967 | -4.94 | -4.39 | 10.58 | 24.87 | 32.77 | 45.63 | 45.96 | c | 46.74 | 36.53 | 20.90 | 13.87 | 0.00 | 22.38 | ||||||||||||
1968 | -0.97 | -5.45 | 3.48 | 15.10 | 30.97 | 41.67 | 49.87 | 45.58 | 30.34 | a | 20.32 | 6.23 | -12.58 | 18.71 | ||||||||||||
1969 | -2.42 | -3.00 | 7.35 | 19.83 | 35.26 | 42.80 | 45.87 | 40.55 | 37.17 | 28.55 | 1.37 | 3.58 | 21.41 | |||||||||||||
1970 | -18.87 | 4.89 | 10.45 | 14.40 | 33.42 | 41.93 | 44.33 | a | 42.03 | 31.18 | b | 5.00 | p | 17.66 | a | -8.10 | b | 19.39 | a | |||||||
1971 | -19.48 | d | -13.86 | -14.58 | 8.37 | 27.07 | b | 40.88 | d | 43.91 | i | ----- | z | 37.67 | o | 21.55 | 4.93 | -3.52 | 5.71 | c | ||||||
1972 | -9.50 | a | -6.72 | -13.65 | 7.70 | 30.16 | 40.53 | 48.94 | 46.81 | 35.67 | 28.13 | 8.10 | 2.61 | 18.23 | ||||||||||||
1973 | -23.61 | c | ----- | z | ----- | z | 15.33 | r | 29.30 | a | 38.60 | 41.68 | 40.58 | 34.96 | b | 19.77 | a | 4.33 | -5.96 | d | 19.96 | c | ||||
1974 | -6.13 | a | -21.92 | c | 7.74 | h | 17.97 | 32.03 | a | 38.27 | 44.16 | 44.23 | 36.89 | b | 16.60 | a | 9.67 | o | ----- | z | 22.45 | c | ||||
1975 | ----- | z | ----- | z | 11.29 | j | 10.07 | 28.62 | e | 41.03 | 45.13 | 42.80 | a | 33.24 | a | 22.35 | ----- | z | ----- | z | 31.89 | e | ||||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.33 | 44.58 | ----- | z | ----- | z | 19.87 | 5.63 | -3.00 | e | 21.48 | g | ||||
1977 | 8.55 | 4.07 | a | ----- | z | 1.10 | a | 28.48 | 43.10 | 45.83 | b | 48.11 | d | 42.68 | h | 19.70 | a | ----- | z | -5.90 | 21.45 | c | ||||
1978 | 7.77 | 2.96 | c | 3.43 | a | ----- | z | 33.87 | 39.87 | 45.27 | a | 47.80 | a | 36.23 | 18.39 | 17.00 | j | 6.64 | c | 24.22 | b | |||||
1979 | 10.55 | ----- | z | 25.70 | u | 23.83 | 33.45 | 41.20 | 41.45 | 45.71 | 33.10 | a | 25.43 | h | 15.14 | b | -20.07 | a | 24.93 | c | ||||||
1980 | -19.59 | b | -2.12 | m | 6.20 | p | ----- | z | 31.54 | g | 38.97 | 46.32 | 42.44 | f | 36.10 | i | 22.45 | b | 11.80 | -10.94 | 14.84 | f | ||||
1981 | 8.29 | c | 0.21 | 20.00 | 21.86 | a | 37.39 | 41.27 | 44.87 | 42.00 | 33.57 | b | 22.17 | a | 8.23 | -8.14 | b | 22.64 | ||||||||
1982 | -9.25 | g | -2.65 | e | 4.35 | e | 4.89 | b | 27.52 | 40.63 | 44.87 | 41.68 | 35.72 | a | 14.83 | b | 3.08 | e | -4.52 | j | 21.49 | b | ||||
1983 | -19.88 | g | -0.11 | a | -14.39 | c | 13.90 | a | 34.37 | a | 41.77 | 46.52 | 40.70 | a | 31.67 | 16.55 | 11.10 | 10.35 | 21.13 | a | ||||||
1984 | -5.32 | -23.90 | 8.97 | -17.00 | c | 3.52 | d | 39.17 | 44.86 | b | ----- | z | 35.17 | a | 19.62 | b | 4.17 | 5.13 | 10.40 | a | ||||||
1985 | 15.94 | -5.79 | 1.71 | -0.87 | 30.45 | 37.47 | ----- | z | 42.04 | d | 32.60 | 16.03 | 7.32 | b | 13.30 | a | 17.29 | a | ||||||||
1986 | -4.00 | a | 7.19 | a | -0.30 | a | 8.70 | ----- | z | ----- | z | 43.90 | 40.78 | d | 35.73 | 18.17 | b | 10.40 | 11.65 | 17.22 | b | |||||
1987 | -3.35 | -4.19 | a | 6.58 | ----- | z | 29.52 | 38.31 | a | 44.07 | a | 42.00 | b | 27.80 | 25.04 | d | ----- | z | ----- | z | 22.86 | c | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -2.91 | -3.67 | 1.86 | 11.01 | 30.07 | 40.67 | 45.12 | 43.54 | 33.98 | 20.64 | 8.81 | -1.78 | 20.68 | |||||||||||||
S.D. | 12.18 | 9.29 | 10.13 | 10.38 | 7.01 | 1.94 | 1.97 | 2.69 | 2.62 | 3.64 | 4.56 | 8.95 | 2.07 | |||||||||||||
SKEW | -0.12 | -0.80 | -0.36 | -1.02 | -2.98 | 0.54 | 0.51 | 0.47 | -0.78 | 0.63 | 0.21 | -0.03 | -0.29 | |||||||||||||
MAX | 15.94 | 10.25 | 20.00 | 24.87 | 37.39 | 45.63 | 49.87 | 48.11 | 37.17 | 28.55 | 17.66 | 13.30 | 22.64 | |||||||||||||
MIN | -23.61 | -23.90 | -14.58 | -17.00 | 3.52 | 37.47 | 41.45 | 40.55 | 27.80 | 14.83 | 1.37 | -20.07 | 18.23 | |||||||||||||
YRS | 18 | 17 | 15 | 17 | 19 | 20 | 20 | 17 | 17 | 20 | 18 | 19 | 5 |