YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 98.65 | 85.80 | 77.90 | 67.00 | 57.71 | 77.41 | g | |||||
1963 | 56.71 | 64.71 | 72.94 | 82.50 | 91.57 | a | 96.27 | 97.58 | 90.32 | 87.37 | 81.58 | 67.13 | 58.90 | 78.96 | ||||||||||||
1964 | 55.77 | 57.24 | 67.61 | 79.07 | 88.45 | 94.77 | 96.58 | 94.45 | 88.30 | 81.10 | 68.33 | 58.77 | 77.54 | |||||||||||||
1965 | 62.32 | 61.18 | 65.65 | 81.87 | 87.45 | 94.90 | 97.13 | 92.90 | 88.07 | 81.32 | 72.57 | 59.84 | 78.77 | |||||||||||||
1966 | 53.74 | 57.96 | 73.58 | 79.30 | 87.65 | 92.10 | 97.90 | 89.71 | 85.70 | 78.42 | 72.40 | 59.94 | 77.37 | |||||||||||||
1967 | 61.19 | 64.50 | 78.73 | a | 83.77 | 88.29 | 94.83 | a | 95.23 | 90.94 | 87.33 | 83.06 | 67.90 | 53.42 | 79.10 | |||||||||||
1968 | 57.29 | 62.66 | 67.00 | 76.10 | 89.00 | a | 97.40 | 91.94 | 90.65 | 88.73 | 84.32 | 64.60 | 58.52 | 77.35 | ||||||||||||
1969 | 64.42 | 64.71 | 65.39 | 83.73 | 91.19 | 96.67 | 97.90 | 98.00 | 87.60 | 78.19 | 64.80 | 60.87 | 79.46 | |||||||||||||
1970 | 59.55 | 61.86 | 67.29 | 79.10 | 90.45 | 93.33 | 95.06 | 94.10 | 87.03 | 73.71 | 69.53 | 66.03 | 78.09 | |||||||||||||
1971 | 62.52 | 65.32 | 76.81 | 79.13 | 88.35 | 96.93 | 95.52 | 88.35 | 88.40 | 76.48 | 69.90 | 60.03 | 78.98 | |||||||||||||
1972 | 61.16 | 68.55 | 78.19 | 85.43 | 88.10 | 93.43 | 94.71 | 88.77 | 84.50 | 79.71 | 61.40 | 59.32 | 78.61 | |||||||||||||
1973 | 52.52 | 57.57 | 67.45 | 74.90 | 86.10 | 93.47 | 92.74 | 93.19 | 90.73 | 82.00 | 72.70 | 63.19 | 77.21 | |||||||||||||
1974 | 61.77 | 65.21 | 78.55 | 81.37 | 91.61 | 98.37 | 92.87 | 89.16 | 80.77 | 73.84 | 64.30 | 55.65 | 77.79 | |||||||||||||
1975 | 58.06 | 63.07 | a | 72.23 | 75.80 | 84.77 | 96.17 | 89.94 | 90.84 | 84.52 | a | 81.39 | 69.60 | 61.13 | 77.29 | |||||||||||
1976 | 59.39 | 70.55 | 72.45 | 79.47 | 84.16 | 94.97 | 90.26 | 93.84 | 84.13 | 74.06 | 58.93 | 56.90 | 76.59 | |||||||||||||
1977 | 57.13 | a | 66.18 | 68.61 | 78.23 | 88.00 | 97.73 | 95.19 | 97.19 | 93.80 | 78.29 | 69.13 | 65.04 | f | 80.86 | a | ||||||||||
1978 | 58.87 | 60.93 | 72.84 | 82.33 | 87.97 | 98.66 | a | 96.57 | a | 88.40 | u | 70.50 | t | 77.35 | 65.83 | 57.13 | 75.85 | b | ||||||||
1979 | 51.58 | 62.64 | c | 68.55 | 80.15 | d | 85.52 | h | 93.40 | 97.34 | b | 92.42 | e | 87.53 | 85.06 | 63.50 | 60.94 | 76.65 | a | |||||||
1980 | ----- | z | 64.93 | 69.84 | ----- | z | 85.97 | 103.37 | 100.52 | 93.26 | 85.67 | ----- | z | 62.27 | 64.16 | 81.11 | c | |||||||||
1981 | 54.52 | 66.29 | 67.13 | a | 81.72 | a | 87.00 | 97.83 | 97.42 | 91.07 | d | 87.85 | c | 79.76 | b | 76.60 | 66.07 | a | 79.44 | |||||||
1982 | 61.00 | b | 63.75 | h | 72.47 | a | 78.96 | d | 85.62 | b | 96.53 | 96.58 | 92.96 | c | 88.59 | a | 78.81 | d | 61.87 | 50.89 | c | 78.57 | a | |||
1983 | 53.94 | 60.93 | 67.23 | a | 68.59 | a | 85.73 | a | 94.90 | a | 97.10 | a | 95.81 | 89.52 | a | 78.57 | c | 67.27 | 58.79 | b | 76.53 | |||||
1984 | 57.80 | a | 63.28 | 71.47 | a | 79.63 | 91.47 | a | 92.13 | 93.90 | 86.35 | 87.67 | 71.35 | 63.97 | 59.74 | 76.56 | ||||||||||
1985 | 56.48 | 62.42 | d | 70.97 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.00 | l | 76.21 | b | 68.07 | b | 58.89 | l | 66.83 | g | |
1986 | ----- | z | 64.62 | b | 72.03 | a | 82.85 | d | 84.56 | d | 88.77 | d | 90.56 | d | 88.46 | e | 87.56 | l | 73.50 | a | 61.22 | c | 53.28 | b | 75.98 | b |
1987 | 57.07 | c | 58.45 | f | 66.19 | 74.17 | a | 81.18 | c | ----- | z | 92.97 | b | ----- | z | 83.33 | 80.77 | ----- | z | 54.79 | b | 73.81 | d | |||
1988 | 56.10 | a | 63.75 | a | 70.32 | 76.79 | a | ----- | z | 92.26 | c | 91.28 | b | 86.05 | j | 86.07 | a | 80.10 | b | ----- | z | 55.86 | b | 74.73 | c | |
1989 | ----- | z | 62.07 | 72.96 | g | ----- | z | 89.17 | b | 95.20 | e | 94.13 | 90.17 | b | 85.07 | a | 80.67 | d | 67.90 | 55.00 | b | 79.93 | c | |||
1990 | 60.27 | a | 62.96 | 69.97 | 79.61 | b | 84.77 | 98.89 | b | 89.70 | a | 87.27 | a | 83.72 | a | 79.81 | 69.40 | 59.50 | a | 77.16 | ||||||
1991 | 55.20 | a | 64.86 | 69.07 | a | 79.53 | 88.48 | 93.90 | 87.48 | 88.74 | 80.93 | 79.84 | 63.70 | 55.58 | 75.61 | |||||||||||
1992 | 51.42 | 61.50 | a | 70.50 | a | 81.26 | c | 81.45 | 93.17 | 95.29 | 92.35 | 91.45 | a | 82.77 | a | 64.23 | 58.03 | 76.95 | ||||||||
1993 | 59.31 | b | 62.61 | 71.67 | a | 80.67 | 87.40 | a | 95.00 | 94.00 | a | 92.84 | 88.37 | c | 77.10 | b | 66.30 | 59.33 | a | 77.88 | ||||||
1994 | 60.61 | 64.82 | 72.83 | a | 80.00 | b | 88.38 | b | 98.97 | a | 97.21 | b | 95.77 | a | 89.79 | a | 80.84 | 67.93 | b | 59.07 | b | 79.68 | ||||
1995 | ----- | z | 67.36 | f | 71.07 | d | 78.46 | b | 87.50 | c | 93.00 | 97.70 | a | 94.00 | a | 87.96 | b | 83.13 | a | 69.04 | b | 60.77 | 82.26 | b | ||
1996 | 61.61 | c | 67.18 | a | 69.80 | a | 82.04 | b | 95.18 | c | 95.85 | c | 93.68 | 90.71 | c | 85.57 | b | 79.83 | a | 68.93 | a | 60.52 | b | 79.24 | ||
1997 | 56.24 | b | 60.89 | a | 75.73 | a | 75.41 | c | 87.27 | a | 93.28 | a | 95.17 | a | 93.16 | 90.33 | 77.07 | c | 66.04 | b | 54.70 | a | 77.11 | |||
1998 | 58.86 | b | 59.16 | c | 70.35 | h | 77.77 | 90.32 | 96.93 | a | 94.90 | 90.82 | c | 90.07 | a | 77.41 | b | 69.37 | 59.03 | b | 78.60 | a | ||||
1999 | 62.46 | e | 68.88 | c | 72.28 | b | 77.54 | d | 85.96 | c | 92.70 | 91.48 | 91.37 | a | 87.07 | 80.73 | a | 72.73 | 55.59 | b | 78.23 | |||||
2000 | 63.43 | a | 69.11 | a | 73.06 | 83.89 | c | 93.57 | a | 92.14 | a | 95.29 | 92.52 | b | 91.50 | 76.90 | a | 58.34 | a | 56.89 | c | 78.89 | ||||
2001 | 54.27 | a | 65.71 | 69.00 | 82.14 | b | 90.07 | a | 95.28 | l | 99.00 | x | 90.92 | r | 90.31 | q | 82.22 | m | 65.33 | l | 56.64 | q | 72.24 | g | ||
2002 | 59.94 | o | 59.81 | l | 71.61 | h | 83.48 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.31 | b | 63.04 | f | 55.17 | a | 64.24 | j |
2003 | ----- | z | ----- | z | 69.00 | b | 80.11 | b | 88.60 | a | 93.86 | a | 95.93 | a | 93.03 | 88.38 | a | 80.90 | b | 66.77 | d | 59.03 | b | 81.56 | b | |
2004 | 57.75 | c | 58.35 | c | 72.96 | e | 77.05 | j | 88.67 | j | 93.09 | h | 94.17 | h | 88.58 | g | 87.26 | g | 76.45 | i | 57.52 | i | 53.57 | q | 63.02 | i |
2005 | 60.72 | m | 58.62 | l | 65.90 | k | 77.32 | b | 86.94 | 95.48 | a | 94.88 | n | 89.18 | c | 89.73 | d | 75.45 | 69.76 | a | 60.33 | g | 83.41 | e | ||
2006 | 63.54 | g | 64.09 | e | 71.72 | f | 83.71 | f | 91.03 | b | 94.89 | b | 93.10 | b | 86.42 | 80.23 | 76.34 | b | 69.73 | ----- | z | 81.98 | d | |||
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.17 | 91.39 | 92.32 | 88.90 | a | 81.65 | ----- | z | ----- | z | 89.88 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 58.12 | 63.51 | 70.99 | 79.49 | 87.97 | 95.19 | 94.53 | 91.85 | 87.20 | 78.85 | 67.02 | 58.46 | 77.94 | |||||||||||||
S.D. | 3.41 | 3.18 | 3.45 | 3.23 | 2.91 | 2.59 | 2.82 | 2.94 | 2.95 | 3.18 | 3.92 | 3.28 | 1.10 | |||||||||||||
SKEW | -0.17 | 0.01 | 0.55 | -0.93 | -0.01 | 0.51 | -0.40 | 0.27 | -0.44 | -0.34 | -0.11 | 0.20 | -0.11 | |||||||||||||
MAX | 64.42 | 70.55 | 78.73 | 85.43 | 95.18 | 103.37 | 100.52 | 98.65 | 93.80 | 85.06 | 76.60 | 66.07 | 79.68 | |||||||||||||
MIN | 51.42 | 57.24 | 65.39 | 68.59 | 81.18 | 88.77 | 87.48 | 86.35 | 80.23 | 71.35 | 58.34 | 50.89 | 75.61 | |||||||||||||
YRS | 36 | 38 | 39 | 38 | 39 | 40 | 40 | 39 | 40 | 43 | 40 | 39 | 26 |