YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 83.61 | 72.37 | 60.35 | 72.11 | i | |||
1954 | 63.29 | 71.11 | 65.83 | a | 82.47 | 87.10 | 94.13 | 97.06 | 92.26 | 93.63 | 85.77 | 76.30 | 64.58 | 81.13 | ||||||||||||
1955 | 55.45 | 59.96 | 69.97 | 76.40 | 83.87 | 93.30 | 94.35 | 90.90 | 93.77 | 86.94 | 70.23 | 65.68 | 78.40 | |||||||||||||
1956 | 64.52 | 56.76 | 72.97 | 74.40 | 87.68 | 97.27 | 95.42 | 94.19 | 96.63 | 82.58 | 68.40 | 62.58 | 79.45 | |||||||||||||
1957 | 58.48 | 68.46 | 66.42 | 73.50 | 79.03 | 95.33 | 97.00 | 93.52 | 92.83 | 76.13 | 62.83 | 64.48 | 77.34 | |||||||||||||
1958 | 61.61 | 65.00 | 60.26 | 73.20 | 90.71 | 96.00 | 99.10 | 96.00 | 91.27 | 81.39 | 69.30 | 69.90 | 79.48 | |||||||||||||
1959 | 65.32 | 61.82 | 72.00 | 81.43 | 84.68 | 98.47 | 99.00 | 91.16 | 90.90 | 81.94 | 68.53 | 60.71 | 79.66 | |||||||||||||
1960 | 54.16 | 56.62 | 72.23 | 78.63 | 85.84 | 98.80 | 99.35 | 95.87 | 95.03 | 79.16 | 71.63 | 60.87 | 79.02 | |||||||||||||
1961 | 63.48 | 66.25 | 68.06 | 77.50 | 86.10 | 96.90 | 98.06 | 94.16 | 87.80 | 81.61 | 64.90 | 59.16 | 78.67 | |||||||||||||
1962 | 57.42 | 63.43 | 62.48 | 82.77 | 83.48 | 94.03 | 96.87 | 99.65 | 91.37 | 81.87 | 73.80 | 63.87 | 79.25 | |||||||||||||
1963 | 57.45 | 68.93 | 67.74 | 73.27 | 88.74 | 91.43 | 98.74 | 91.13 | 92.33 | 85.23 | 68.80 | 64.23 | 79.00 | |||||||||||||
1964 | 58.81 | 60.00 | 62.84 | 73.30 | 84.03 | 92.97 | 97.71 | 92.00 | 88.37 | 85.84 | 65.47 | 61.06 | 76.87 | |||||||||||||
1965 | 61.48 | 61.75 | 64.03 | 73.50 | 81.87 | 89.20 | 96.61 | 96.32 | 88.47 | 85.35 | 72.53 | 58.39 | 77.46 | |||||||||||||
1966 | 56.00 | 55.68 | 70.42 | 78.33 | 87.77 | 94.93 | 96.48 | 96.71 | 90.10 | 81.65 | 72.57 | 62.48 | 78.59 | |||||||||||||
1967 | 62.71 | 67.46 | 73.10 | 70.50 | 83.74 | 90.80 | 95.58 | 95.87 | 90.33 | 84.87 | 74.03 | 56.61 | 78.80 | |||||||||||||
1968 | 61.35 | 67.24 | 66.90 | 73.43 | 84.74 | 95.37 | 94.81 | 90.35 | 89.03 | 82.81 | 68.60 | 58.71 | 77.78 | |||||||||||||
1969 | 64.23 | 60.86 | 63.90 | 78.87 | 86.77 | 92.90 | 97.48 | 99.10 | 94.33 | 81.45 | 68.57 | 63.84 | 79.36 | |||||||||||||
1970 | 60.97 | 67.54 | 65.65 | 71.47 | 89.97 | 96.10 | 99.19 | 98.13 | 89.20 | 80.35 | 73.03 | 62.61 | 79.52 | |||||||||||||
1971 | 63.87 | 65.21 | 72.55 | 74.53 | 83.97 | 94.80 | 99.58 | 92.48 | 91.97 | 74.74 | 67.23 | 55.37 | a | 78.03 | ||||||||||||
1972 | 63.52 | 69.10 | 79.97 | 79.03 | 87.55 | 94.93 | 100.87 | 96.16 | 92.37 | 77.26 | 64.72 | a | 59.06 | 80.38 | ||||||||||||
1973 | 57.55 | 60.64 | 61.32 | 73.33 | 87.48 | 95.73 | 97.71 | 98.74 | 93.70 | 86.87 | 73.13 | 68.45 | 79.56 | |||||||||||||
1974 | 63.74 | 65.86 | 69.71 | 81.40 | 90.29 | 101.70 | 98.16 | 97.00 | 92.07 | 82.23 | 70.60 | 58.97 | 80.98 | |||||||||||||
1975 | 59.17 | a | 63.57 | 68.90 | 72.63 | 80.94 | 96.60 | 98.71 | 98.61 | 95.20 | 85.30 | d | 72.73 | 63.84 | 79.68 | |||||||||||
1976 | 63.60 | a | 66.97 | 68.29 | 75.80 | 89.03 | 97.83 | 97.74 | 97.74 | 90.73 | 80.23 | 72.80 | 63.23 | 80.33 | ||||||||||||
1977 | 57.16 | 69.32 | 66.61 | 79.28 | a | 81.58 | 98.13 | 99.48 | 96.61 | 92.20 | 86.58 | 76.10 | a | 69.87 | 81.08 | |||||||||||
1978 | 61.71 | 61.96 | 68.94 | 77.30 | 85.07 | d | 99.77 | 101.14 | c | 97.11 | c | 93.27 | d | 86.62 | b | 69.38 | d | 57.82 | c | 80.01 | ||||||
1979 | 55.59 | b | 64.37 | a | 69.94 | o | 79.17 | f | 82.47 | a | 95.79 | a | 100.35 | 95.23 | a | 97.57 | 87.20 | a | 67.57 | 67.89 | d | 81.40 | b | |||
1980 | 62.55 | 66.18 | a | 64.96 | f | 76.83 | g | 81.90 | j | 98.50 | h | ----- | z | 96.84 | f | 94.88 | e | 83.62 | b | 76.11 | l | 72.84 | l | 76.81 | h | |
1981 | 64.96 | h | 68.46 | d | 68.16 | f | 81.32 | b | 84.42 | 99.87 | 97.93 | b | 98.07 | a | 94.36 | b | 80.75 | c | 75.62 | d | 67.68 | f | 86.75 | c | ||
1982 | 60.12 | f | 63.27 | b | 65.59 | b | 76.78 | c | 82.92 | g | 93.69 | d | 97.09 | h | 95.55 | 90.52 | c | 81.35 | 66.11 | c | 58.17 | b | 76.78 | c | ||
1983 | 61.63 | d | 61.50 | 63.13 | 69.17 | 85.13 | 93.20 | 98.13 | 94.55 | 93.50 | 79.13 | 66.67 | 60.65 | 77.20 | ||||||||||||
1984 | 62.10 | 66.10 | 72.81 | 74.17 | 91.26 | 94.47 | 95.00 | c | 91.64 | i | 91.72 | a | 74.97 | 65.10 | j | 58.50 | c | 78.11 | b | |||||||
1985 | 57.42 | 58.35 | b | 64.52 | 74.21 | b | 81.78 | d | 91.56 | c | 97.21 | c | 96.45 | 87.64 | b | 77.58 | 65.27 | 62.48 | 76.21 | |||||||
1986 | 68.61 | 63.44 | a | 71.68 | 76.86 | a | 86.57 | a | 96.77 | 88.03 | 95.39 | 88.15 | c | 78.93 | c | 67.93 | 60.87 | 78.60 | ||||||||
1987 | 59.97 | a | 59.59 | a | 64.13 | 65.24 | e | 83.79 | b | 96.59 | c | 97.53 | a | 93.93 | a | 89.73 | 85.53 | a | 66.56 | c | 56.40 | a | 76.58 | |||
1988 | 52.55 | 66.72 | 71.58 | 76.37 | c | 85.90 | 96.37 | 97.21 | b | 93.97 | 90.76 | a | 86.07 | b | 70.07 | a | 60.42 | 79.00 | ||||||||
1989 | 59.57 | a | 65.68 | 75.00 | 84.83 | 87.70 | a | 95.47 | 99.07 | a | 94.90 | b | 93.60 | 81.43 | a | 72.93 | 62.83 | a | 81.08 | |||||||
1990 | 59.53 | a | 59.68 | 69.60 | a | 77.93 | a | 84.00 | 98.03 | 94.16 | 92.32 | 90.37 | 83.52 | 71.04 | b | 55.74 | 77.99 | |||||||||
1991 | 57.81 | 69.75 | 60.06 | 75.20 | 84.13 | 90.70 | 95.52 | 95.10 | a | 90.30 | 84.45 | 66.53 | 57.61 | 77.26 | ||||||||||||
1992 | 58.35 | 63.28 | 66.06 | 79.73 | 83.71 | 92.66 | a | 94.80 | a | 92.58 | 92.17 | 85.97 | 65.00 | a | 56.35 | 77.56 | ||||||||||
1993 | 58.97 | 59.18 | 68.71 | 77.50 | 87.19 | 94.76 | a | 95.00 | 98.78 | m | 89.67 | i | 80.48 | 66.38 | a | 62.77 | a | 75.09 | b | |||||||
1994 | 64.00 | 61.25 | 69.90 | 77.70 | c | 82.55 | 97.52 | e | 98.68 | 98.06 | 91.50 | 77.07 | c | 63.24 | a | 60.84 | 78.53 | |||||||||
1995 | 57.32 | 68.04 | 68.16 | 74.25 | j | 79.52 | b | 92.31 | a | 99.70 | a | 96.86 | b | 93.13 | 85.20 | a | 74.23 | 64.35 | 79.89 | a | ||||||
1996 | 64.39 | 65.97 | 69.84 | 79.90 | a | 89.10 | 97.50 | 98.38 | b | ----- | z | 87.10 | t | 81.13 | a | 71.27 | 63.29 | c | 78.07 | b | ||||||
1997 | 58.07 | c | 64.50 | 75.70 | a | 74.00 | a | 89.57 | a | 93.77 | 97.70 | a | 97.19 | 93.83 | ----- | z | 70.97 | 55.59 | b | 79.17 | a | |||||
1998 | 61.46 | e | 55.87 | e | 65.30 | a | 71.76 | a | ----- | z | ----- | z | 100.04 | e | 98.43 | c | 94.31 | a | 82.87 | 72.55 | a | 62.10 | a | 76.47 | b | |
1999 | 67.23 | 69.89 | 73.71 | 72.67 | 86.03 | 94.47 | 94.87 | a | 96.68 | 93.33 | 88.35 | 79.60 | 63.58 | 81.70 | ||||||||||||
2000 | 67.19 | 69.41 | 69.59 | b | 82.10 | 92.26 | 96.97 | 100.26 | 97.21 | b | 96.17 | 78.19 | 61.66 | a | 65.83 | a | 81.40 | |||||||||
2001 | 58.40 | a | 61.46 | 69.26 | 75.77 | 91.48 | 97.87 | 97.29 | 95.40 | a | 96.37 | 85.14 | c | 73.20 | 59.48 | 80.09 | ||||||||||
2002 | 62.26 | 67.93 | 71.43 | a | 83.03 | 87.87 | 100.59 | a | 99.55 | 97.81 | 94.27 | 80.29 | 74.03 | a | 60.13 | 81.60 | ||||||||||
2003 | 70.77 | 63.31 | b | 67.20 | a | 75.47 | 87.94 | 97.00 | 101.35 | 97.71 | 94.67 | 89.10 | 68.17 | 63.70 | a | 81.36 | ||||||||||
2004 | 61.90 | 61.00 | i | 76.19 | 76.68 | b | 89.07 | b | 97.07 | a | 98.69 | b | 95.97 | a | 92.48 | e | 79.85 | d | 64.21 | a | 61.56 | d | 81.24 | a | ||
2005 | 61.43 | h | 60.63 | a | 66.67 | d | 77.79 | a | 87.07 | a | ----- | z | 101.23 | a | 93.43 | c | 93.93 | c | 83.30 | a | 74.07 | b | 67.57 | h | 82.01 | c |
2006 | 66.00 | g | 69.32 | c | 65.93 | a | 80.90 | a | 90.58 | 99.83 | 98.45 | 93.52 | ----- | z | ----- | z | ----- | z | ----- | z | 85.50 | e | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.91 | 64.13 | 68.46 | 76.47 | 86.06 | 95.64 | 97.69 | 95.47 | 92.32 | 82.50 | 69.87 | 61.56 | 79.15 | |||||||||||||
S.D. | 3.77 | 4.06 | 4.25 | 3.94 | 3.17 | 2.72 | 2.34 | 2.38 | 2.41 | 3.46 | 3.96 | 3.55 | 1.48 | |||||||||||||
SKEW | 0.23 | -0.30 | 0.22 | -0.17 | -0.10 | -0.11 | -1.37 | -0.40 | -0.07 | -0.30 | 0.02 | 0.33 | -0.02 | |||||||||||||
MAX | 70.77 | 71.11 | 79.97 | 84.83 | 92.26 | 101.70 | 101.35 | 99.65 | 97.57 | 89.10 | 79.60 | 69.90 | 81.70 | |||||||||||||
MIN | 52.55 | 55.68 | 60.06 | 65.24 | 79.03 | 89.20 | 88.03 | 90.35 | 87.64 | 74.74 | 61.66 | 55.37 | 76.21 | |||||||||||||
YRS | 49 | 52 | 50 | 50 | 50 | 50 | 51 | 49 | 50 | 52 | 51 | 50 | 40 |