YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.97 | 80.13 | 71.80 | 55.74 | 47.03 | 22.77 | a | 60.74 | f | |||||
1917 | 20.55 | 21.30 | a | 34.65 | 48.97 | 63.97 | 71.50 | 82.74 | 79.03 | 69.07 | ----- | z | 51.50 | ----- | z | 54.33 | b | |||||||||
1918 | ----- | z | ----- | z | ----- | z | 52.30 | 68.65 | 77.67 | 78.97 | 79.62 | g | 65.60 | 62.10 | a | ----- | z | ----- | z | 67.55 | f | |||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | 69.78 | h | 77.10 | a | 86.43 | a | 81.87 | 80.39 | b | ----- | z | ----- | z | 21.97 | 69.55 | g | ||
1920 | 25.89 | d | 30.31 | 42.27 | a | 45.63 | 67.39 | 76.63 | 82.94 | 80.06 | 77.20 | 67.52 | 39.10 | 27.57 | a | 55.21 | ||||||||||
1921 | 33.62 | b | 39.11 | 46.38 | b | ----- | z | 69.68 | 84.04 | f | 85.55 | 79.77 | ----- | z | ----- | z | 35.36 | p | 32.94 | 55.29 | e | |||||
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.44 | f | ----- | z |
1972 | 17.39 | 20.90 | 35.19 | 47.57 | 67.52 | 76.13 | 78.29 | 78.16 | 68.23 | 53.19 | 35.60 | 20.48 | 49.89 | |||||||||||||
1973 | 24.06 | 27.25 | 43.16 | 52.03 | 64.94 | 79.33 | 81.23 | 83.81 | 67.73 | 63.06 | 40.07 | 22.19 | 54.07 | |||||||||||||
1974 | 20.77 | 26.61 | 37.97 | 55.13 | 62.94 | 77.13 | 87.58 | 77.48 | 68.97 | 61.19 | 40.57 | 30.65 | 53.92 | |||||||||||||
1975 | 23.77 | a | 21.39 | 29.74 | 42.00 | 70.71 | 74.60 | 87.06 | 80.77 | 67.20 | 61.58 | 42.63 | 24.74 | 52.18 | ||||||||||||
1976 | 21.23 | 33.55 | 37.81 | 59.83 | 67.77 | 81.53 | 86.74 | 84.42 | 73.53 | 53.39 | 36.50 | 23.84 | 55.01 | |||||||||||||
1977 | 10.61 | 31.21 | 41.16 | 61.43 | 76.71 | 79.27 | 83.32 | 74.68 | 69.80 | 56.13 | 37.90 | 20.87 | 53.59 | |||||||||||||
1978 | 10.81 | 16.43 | 36.00 | 49.80 | 68.58 | 76.20 | 80.52 | 80.81 | 76.50 | 58.48 | 39.73 | 22.03 | 51.32 | |||||||||||||
1979 | 7.87 | 13.64 | 31.39 | 46.07 | 62.39 | 75.37 | 81.42 | 75.84 | 73.27 | 56.68 | 38.33 | 33.87 | 49.68 | |||||||||||||
1980 | 23.84 | 22.45 | 32.71 | 58.73 | 71.03 | 77.67 | 84.48 | 79.65 | 71.87 | 55.23 | 46.43 | 27.90 | 54.33 | |||||||||||||
1981 | 29.84 | 32.57 | 47.90 | 61.33 | 66.35 | 78.23 | 81.90 | 77.35 | 72.00 | 54.32 | 46.70 | 23.35 | 55.99 | |||||||||||||
1982 | 10.94 | 23.32 | 35.39 | 50.73 | 66.32 | 71.83 | 81.65 | 79.03 | 68.07 | 56.29 | 34.73 | 30.77 | 50.76 | |||||||||||||
1983 | 24.61 | 28.82 | 34.77 | 46.70 | 62.94 | 73.77 | 86.32 | 86.58 | 71.73 | 55.94 | 36.13 | 7.48 | 51.32 | |||||||||||||
1984 | 21.45 | 32.79 | 28.06 | 51.60 | 63.61 | 75.43 | 81.16 | 82.77 | 65.67 | 56.29 | 42.27 | 25.94 | 52.25 | |||||||||||||
1985 | ----- | z | ----- | z | ----- | z | ----- | z | 75.96 | c | 76.44 | c | 83.54 | e | ----- | z | 65.52 | e | 56.80 | k | 23.95 | h | 17.41 | b | 63.78 | g |
1986 | 28.23 | a | 21.32 | c | 44.07 | b | 58.68 | b | 70.60 | a | 81.33 | c | 83.88 | e | 78.17 | b | 68.78 | c | 58.24 | b | 37.81 | c | 36.30 | a | 55.62 | |
1987 | 32.83 | a | 42.96 | a | 46.10 | a | 69.45 | a | 77.60 | f | 83.07 | c | 86.71 | 79.58 | e | 73.72 | a | 56.71 | 46.13 | 30.10 | b | 58.85 | a | |||
1988 | 18.59 | b | 20.62 | 43.65 | 62.76 | a | 78.10 | a | 87.74 | c | 88.03 | b | 85.41 | d | 75.81 | c | 57.35 | 40.63 | 30.52 | d | 57.43 | |||||
1989 | 34.20 | a | 18.93 | a | 36.00 | b | 57.11 | b | 72.66 | b | 79.93 | a | 85.53 | a | 82.32 | 72.50 | 63.63 | a | 37.97 | 17.90 | 54.89 | |||||
1990 | 37.93 | a | 35.50 | 44.70 | a | 60.30 | 67.42 | 80.21 | a | 81.21 | b | 80.37 | a | 77.07 | 59.84 | 45.00 | 25.27 | a | 57.90 | |||||||
1991 | 21.77 | 37.46 | 45.30 | a | 60.80 | 70.23 | 80.67 | 79.07 | a | 78.21 | b | 70.48 | a | 58.87 | a | 32.20 | 33.30 | a | 55.70 | |||||||
1992 | 33.97 | 34.17 | 44.33 | a | 51.97 | 73.73 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.63 | g | |||
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.25 | 27.51 | 39.07 | 54.39 | 68.76 | 77.87 | 83.59 | 80.26 | 71.30 | 58.26 | 40.68 | 25.42 | 53.74 | |||||||||||||
S.D. | 8.28 | 7.78 | 5.85 | 6.87 | 4.41 | 3.61 | 2.91 | 2.90 | 3.99 | 3.64 | 4.81 | 6.46 | 2.42 | |||||||||||||
SKEW | -0.14 | 0.14 | -0.20 | 0.17 | 0.47 | 0.58 | -0.13 | 0.36 | 0.43 | 0.79 | 0.43 | -0.61 | -0.13 | |||||||||||||
MAX | 37.93 | 42.96 | 47.90 | 69.45 | 78.10 | 87.74 | 88.03 | 86.58 | 80.39 | 67.52 | 51.50 | 36.30 | 57.90 | |||||||||||||
MIN | 7.87 | 13.64 | 28.06 | 42.00 | 62.39 | 71.50 | 78.29 | 74.68 | 65.52 | 53.19 | 32.20 | 7.48 | 49.68 | |||||||||||||
YRS | 23 | 23 | 23 | 23 | 24 | 24 | 26 | 24 | 25 | 22 | 22 | 24 | 19 |