YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.93 | 95.07 | a | 92.94 | 86.38 | a | 74.00 | 59.69 | a | 48.84 | 77.26 | e | ||||
1971 | 55.00 | a | 58.82 | 59.74 | 64.93 | b | 68.27 | a | ----- | z | 93.16 | 93.87 | a | 87.21 | b | 69.82 | c | 61.37 | 47.94 | 69.10 | a | |||||
1972 | 53.24 | b | 58.31 | 67.28 | b | 64.89 | b | 78.03 | b | 88.10 | a | 93.57 | c | 92.30 | a | 81.33 | c | 69.07 | c | 56.04 | b | 48.29 | 70.87 | |||
1973 | 50.13 | 56.96 | a | 56.10 | b | 70.22 | c | 80.76 | b | 87.73 | d | 94.00 | e | 92.70 | d | 83.86 | a | 73.29 | c | ----- | z | 53.43 | a | 72.65 | a | |
1974 | 52.71 | 57.61 | e | 59.27 | e | 65.71 | b | 77.32 | c | 86.38 | a | 88.71 | c | 92.44 | f | 92.12 | d | 78.35 | 62.07 | a | 54.13 | 70.40 | a | |||
1975 | 57.11 | d | 54.33 | d | 56.03 | b | 59.46 | d | 75.89 | d | 84.13 | g | 89.43 | c | 88.61 | 91.29 | b | 69.30 | a | 60.43 | 58.67 | d | 69.14 | a | ||
1976 | 59.07 | b | ----- | z | 61.87 | 65.04 | d | 81.67 | g | 85.08 | e | 93.33 | a | 86.10 | a | 84.33 | 78.90 | a | 67.04 | b | 61.58 | l | 75.64 | c | ||
1977 | 56.04 | d | ----- | z | ----- | z | ----- | z | 61.12 | o | 89.75 | j | 93.21 | b | 92.00 | a | 82.41 | a | 77.30 | a | 63.59 | c | 56.63 | a | 74.45 | e |
1978 | 55.07 | d | 56.12 | b | 64.32 | c | 62.68 | b | ----- | z | 82.52 | c | 91.39 | c | 91.21 | b | 82.15 | d | 82.73 | e | 60.75 | b | 51.50 | c | 70.95 | a |
1979 | 52.00 | 54.84 | c | 61.90 | a | 65.68 | b | 76.97 | b | 85.31 | a | 90.71 | 87.83 | a | ----- | z | 74.28 | b | 60.37 | 58.84 | 69.88 | a | ||||
1980 | ----- | z | 58.89 | b | 61.63 | a | 67.72 | e | 71.69 | b | 77.78 | c | 89.27 | a | 87.63 | a | ----- | z | 76.93 | c | ----- | z | 60.16 | 72.41 | c | |
1981 | 58.74 | 59.75 | d | 59.55 | b | 69.90 | 75.04 | d | 88.29 | b | 92.82 | c | 94.19 | e | 87.23 | 69.79 | b | 61.54 | d | 55.58 | 72.70 | |||||
1982 | 51.55 | 58.71 | 56.17 | b | 63.69 | a | 79.24 | b | 80.48 | c | 88.52 | d | 91.50 | c | 81.48 | a | 72.40 | a | 56.57 | 54.68 | c | 69.58 | ||||
1983 | 58.27 | a | 56.42 | b | 55.94 | 60.46 | b | 75.64 | c | ----- | z | 89.04 | e | ----- | z | 87.89 | b | 77.20 | a | ----- | z | ----- | z | 70.11 | d | |
1984 | ----- | z | 57.50 | c | ----- | z | ----- | z | 81.07 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.29 | j |
1985 | ----- | z | 62.30 | a | 56.75 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.52 | j |
1986 | ----- | z | ----- | z | 68.12 | n | 66.65 | g | 79.48 | j | 90.33 | l | 90.52 | f | 94.38 | b | 76.20 | e | 78.19 | e | 68.46 | b | 55.86 | c | 74.62 | g |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.68 | c | 92.25 | c | 88.48 | a | 83.00 | g | 61.37 | c | 51.03 | b | 76.36 | g |
1988 | ----- | z | 67.53 | j | 68.62 | j | 68.73 | d | 72.15 | d | 83.19 | d | 96.81 | e | 93.76 | f | 90.39 | b | 82.54 | e | 57.83 | a | 55.10 | b | 75.84 | d |
1989 | 54.65 | e | 53.59 | f | 59.67 | a | 72.14 | a | 76.88 | g | 85.04 | d | 94.21 | b | 89.87 | a | 83.00 | 72.40 | a | 67.17 | a | 62.40 | f | 75.35 | c | |
1990 | 55.83 | b | 55.50 | 64.88 | e | 73.59 | c | 73.33 | a | 84.63 | 94.57 | c | 92.14 | b | 87.96 | b | 79.61 | 65.90 | 52.77 | a | 73.39 | |||||
1991 | 58.43 | a | 67.74 | a | 54.50 | a | 67.00 | d | 69.52 | f | ----- | z | 95.18 | i | ----- | z | ----- | z | ----- | z | ----- | z | 59.29 | 61.39 | g | |
1992 | 57.22 | h | ----- | z | ----- | z | 72.35 | j | 84.64 | f | ----- | z | ----- | z | 95.62 | b | ----- | z | 78.86 | c | ----- | z | 51.50 | c | 75.33 | i |
1993 | ----- | z | 54.68 | ----- | z | ----- | z | 75.09 | i | 81.96 | d | 89.89 | c | 92.33 | g | 88.09 | h | 75.11 | c | 63.87 | 55.87 | 70.23 | f | |||
1994 | 59.48 | d | 56.50 | j | 65.90 | 67.88 | f | 73.97 | a | 86.15 | c | 94.82 | c | 94.53 | a | 88.86 | i | 76.20 | a | 54.44 | e | 50.97 | a | 72.94 | c | |
1995 | 52.39 | 63.75 | 56.38 | b | 64.71 | b | 70.56 | d | ----- | z | ----- | z | 93.81 | e | 87.71 | b | 79.87 | a | 70.33 | 55.44 | d | 69.50 | b | |||
1996 | 55.81 | 60.77 | c | 64.38 | e | 68.73 | 72.37 | a | 85.63 | c | 94.74 | ----- | z | 85.66 | a | ----- | z | 62.37 | 54.32 | c | 70.48 | b | ||||
1997 | 53.87 | ----- | z | 66.84 | 68.64 | e | 81.34 | b | 85.08 | e | 92.97 | 90.55 | b | 87.74 | g | 72.32 | 61.69 | a | 56.68 | 73.00 | b | |||||
1998 | 52.32 | 53.10 | g | 60.93 | c | 64.15 | c | 63.10 | b | 77.57 | b | 93.33 | a | 96.55 | 84.93 | 73.60 | a | 57.37 | 55.90 | 70.89 | a | |||||
1999 | 56.89 | c | 54.39 | e | 57.39 | 66.38 | a | 75.67 | a | 84.13 | 91.00 | 90.11 | c | 91.75 | n | 83.37 | a | 63.81 | c | 60.61 | 71.25 | a | ||||
2000 | 54.81 | 56.81 | c | 63.18 | c | 73.04 | c | 76.90 | a | 90.75 | b | 91.13 | 93.96 | c | 86.93 | b | 71.53 | a | 57.63 | 58.73 | a | 72.95 | ||||
2001 | 55.29 | 51.04 | c | 65.46 | c | 63.77 | h | 87.23 | i | 91.67 | r | 92.68 | 94.45 | 88.83 | 80.00 | 64.56 | c | 51.67 | a | 71.55 | c | |||||
2002 | ----- | z | 61.08 | c | 62.37 | a | 68.62 | a | 76.27 | a | 89.07 | a | 94.90 | 93.32 | 89.83 | a | 77.36 | i | ----- | z | 52.74 | d | 76.47 | c | ||
2003 | 61.74 | 58.46 | 63.87 | a | 60.40 | e | 75.20 | a | 87.14 | a | 96.93 | a | 90.10 | 90.43 | 83.67 | a | 58.47 | m | 52.45 | t | 76.79 | b | ||||
2004 | 54.10 | k | 56.76 | h | 73.30 | a | 73.52 | a | 76.76 | b | 86.75 | b | 92.58 | 93.26 | 88.70 | c | 74.74 | 61.83 | a | 58.42 | 77.99 | b | ||||
2005 | 51.47 | l | 59.35 | b | 65.53 | a | 67.27 | 73.81 | d | 78.07 | b | 94.60 | a | 94.29 | c | 84.71 | b | 74.91 | h | 65.86 | b | 55.93 | a | 73.94 | b | |
2006 | ----- | z | 61.48 | a | 53.45 | 62.54 | f | 78.87 | a | 88.66 | a | 95.89 | c | 91.74 | 89.04 | b | 76.23 | a | 61.28 | a | 56.27 | a | 75.29 | b | ||
2007 | 56.71 | 58.00 | 71.03 | 71.19 | c | 79.10 | b | 86.04 | c | 93.86 | c | 94.47 | a | 82.74 | c | 71.77 | 69.11 | b | 53.55 | 73.96 | ||||||
2008 | 52.07 | d | 58.97 | 65.81 | 71.03 | a | 79.27 | a | 87.93 | b | 94.60 | a | 96.17 | b | 92.10 | 80.03 | ----- | z | 54.00 | 75.63 | a | |||||
2009 | 57.87 | h | 58.15 | a | 63.90 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.02 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.35 | 58.24 | 61.73 | 67.13 | 75.50 | 84.94 | 92.74 | 92.34 | 86.39 | 76.04 | 62.22 | 54.71 | 72.24 | |||||||||||||
S.D. | 2.87 | 3.30 | 4.81 | 3.92 | 4.10 | 3.44 | 2.41 | 2.55 | 3.74 | 4.26 | 4.02 | 3.33 | 1.67 | |||||||||||||
SKEW | 0.22 | 0.58 | 0.27 | -0.12 | -1.03 | -0.74 | -0.32 | -0.62 | -0.58 | 0.09 | 0.14 | -0.22 | -0.68 | |||||||||||||
MAX | 61.74 | 67.74 | 73.30 | 73.59 | 81.34 | 90.75 | 96.93 | 96.55 | 92.12 | 83.67 | 70.33 | 60.61 | 73.96 | |||||||||||||
MIN | 50.13 | 51.04 | 53.45 | 59.46 | 63.10 | 77.57 | 88.52 | 86.10 | 76.20 | 69.07 | 54.44 | 47.94 | 69.58 | |||||||||||||
YRS | 26 | 28 | 32 | 28 | 27 | 27 | 33 | 31 | 29 | 32 | 29 | 33 | 6 |