YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.67 | s | 67.97 | 53.32 | 60.64 | j | ||
1944 | 53.19 | 51.74 | b | 59.83 | b | 65.43 | 77.76 | f | 86.43 | b | 93.77 | 95.81 | 87.30 | 77.81 | d | 58.43 | 56.19 | 71.45 | a | |||||||
1945 | 55.23 | a | 57.32 | 57.25 | g | 68.93 | a | 79.23 | e | 87.83 | 93.81 | 91.84 | 88.03 | a | 76.42 | 66.30 | 50.93 | d | 74.17 | a | ||||||
1946 | 53.52 | h | 58.33 | g | 63.75 | g | 75.61 | b | 79.81 | 94.22 | g | 93.55 | 89.65 | ----- | z | 70.80 | a | 59.37 | c | 60.03 | a | 75.54 | e | |||
1947 | 52.23 | 64.72 | c | 67.48 | d | 73.00 | b | 83.70 | a | 89.50 | h | 96.61 | ----- | z | ----- | z | ----- | z | 55.75 | j | 52.17 | a | 69.99 | e | ||
1948 | 60.52 | d | 53.29 | e | 55.11 | d | 73.75 | n | 83.17 | a | 90.10 | 96.00 | 92.68 | 90.23 | 77.00 | 61.70 | 54.76 | b | 74.05 | a | ||||||
1949 | 40.07 | c | 51.58 | b | 62.84 | 75.17 | 80.96 | g | 88.10 | 93.16 | 92.97 | b | 89.17 | 71.57 | c | 74.30 | 55.29 | 72.20 | a | |||||||
1950 | 53.84 | 64.35 | b | 66.00 | b | 76.40 | 80.77 | 91.60 | 91.32 | 93.48 | 85.80 | 85.65 | 71.20 | 65.21 | b | 77.13 | ||||||||||
1951 | 56.00 | 59.35 | e | 64.55 | b | 70.77 | 80.35 | 90.43 | 98.23 | 91.20 | a | 92.35 | d | 73.73 | t | 62.33 | 52.03 | 74.33 | a | |||||||
1952 | 52.29 | 56.86 | 55.07 | a | 70.67 | 83.10 | a | 88.91 | g | 93.00 | 93.76 | b | 89.83 | a | 84.74 | 59.66 | a | 54.10 | 72.10 | a | ||||||
1953 | 61.84 | 60.07 | a | 67.03 | a | 71.80 | 74.74 | 92.23 | 93.94 | 92.26 | 92.20 | 77.97 | 67.97 | 56.32 | 75.70 | |||||||||||
1954 | 57.90 | b | 68.30 | a | 61.55 | 77.72 | a | 83.83 | b | 90.78 | c | 94.16 | 89.77 | 88.21 | b | 79.55 | b | 71.00 | 58.97 | b | 76.81 | |||||
1955 | 48.36 | c | 55.36 | 66.21 | b | 70.96 | c | 79.77 | 88.08 | e | 91.97 | a | 90.74 | d | 90.25 | j | 81.54 | c | 65.57 | g | 58.00 | q | 74.78 | c | ||
1956 | 58.45 | b | 54.07 | a | 69.60 | a | 70.57 | 84.17 | a | 94.38 | a | 92.23 | a | 91.53 | a | 93.93 | 77.00 | 66.68 | b | 58.58 | e | 75.93 | ||||
1957 | 51.81 | 64.33 | a | 63.57 | a | 68.73 | 71.56 | f | 91.37 | 94.83 | a | 90.00 | d | 89.40 | e | 70.82 | c | 59.04 | g | 60.77 | a | 74.56 | b | |||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 60.55 | 56.38 | b | 68.66 | b | 75.83 | a | 79.62 | b | 93.93 | a | 96.89 | c | 87.79 | c | 86.10 | 78.55 | b | 66.22 | g | 56.96 | c | 76.48 | a | ||
1960 | 50.60 | a | 53.39 | a | 69.42 | 74.67 | 81.76 | b | 95.50 | 98.32 | f | 94.85 | d | 90.54 | d | 73.20 | a | 66.54 | b | 55.72 | b | 73.29 | a | |||
1961 | 60.35 | 61.63 | a | 64.14 | b | 74.62 | a | 81.58 | 95.66 | a | 96.93 | a | 91.32 | c | 84.07 | b | 75.50 | c | 60.57 | b | 51.78 | d | 74.85 | |||
1962 | 54.37 | a | 57.39 | 58.90 | a | 79.17 | a | 78.93 | c | 91.13 | 94.48 | 95.44 | d | 88.11 | b | 78.59 | b | 69.10 | 61.20 | a | 75.57 | |||||
1963 | 53.79 | c | 66.67 | a | 63.96 | c | 69.57 | b | 85.16 | 88.13 | 98.74 | 89.15 | d | 89.43 | b | 80.17 | b | 65.13 | g | 61.00 | c | 76.89 | a | |||
1964 | 54.81 | 57.89 | a | 59.76 | b | 68.83 | a | 80.90 | 89.24 | a | 96.39 | 89.47 | a | 84.90 | 82.70 | a | 62.24 | a | 55.65 | 73.56 | ||||||
1965 | 57.76 | b | 60.18 | 59.81 | d | 68.00 | a | 76.32 | 84.40 | 93.06 | 93.77 | 82.63 | 82.63 | a | 66.00 | a | 54.48 | 73.26 | ||||||||
1966 | 53.32 | 53.68 | 69.39 | 76.63 | 85.06 | 91.46 | d | 96.19 | 93.74 | 88.86 | a | 78.58 | 69.07 | 57.00 | 76.08 | |||||||||||
1967 | 60.13 | 65.68 | 70.65 | 69.10 | 82.72 | b | 87.00 | 95.29 | 93.13 | 87.50 | 82.10 | 69.80 | 49.48 | 76.05 | ||||||||||||
1968 | 54.42 | 64.17 | 66.35 | 69.40 | 82.13 | 94.03 | 95.06 | 90.39 | 91.03 | 79.77 | 64.27 | 53.58 | 75.38 | |||||||||||||
1969 | 57.16 | 55.35 | b | 61.26 | 75.00 | 84.61 | 90.64 | b | 95.50 | a | 96.90 | 89.36 | b | 73.61 | 64.52 | a | 60.04 | d | 75.33 | |||||||
1970 | 57.11 | c | 64.26 | a | 63.00 | 68.37 | 84.39 | 92.77 | 97.57 | a | 95.06 | 84.40 | 74.29 | 68.00 | 53.77 | 75.25 | ||||||||||
1971 | 57.93 | d | 60.26 | i | 69.68 | i | 73.04 | e | 78.39 | 92.27 | 99.34 | b | 91.59 | b | 89.72 | e | 72.32 | l | 64.25 | j | 48.55 | k | 83.18 | e | ||
1972 | 57.43 | j | 65.42 | j | 75.87 | h | 76.68 | h | 84.57 | c | 90.19 | d | 98.38 | e | 94.67 | d | 88.23 | 69.97 | a | 57.83 | 51.54 | c | 79.42 | d | ||
1973 | 52.26 | h | 54.42 | i | 51.81 | d | 69.78 | c | 83.43 | a | 92.80 | 96.39 | 95.10 | 90.14 | b | 80.75 | c | 63.90 | a | 59.52 | 78.36 | b | ||||
1974 | 53.00 | 60.19 | a | 67.77 | 74.53 | 86.48 | 99.63 | 94.39 | 93.61 | 87.25 | b | 75.73 | a | 61.87 | 48.87 | a | 75.28 | |||||||||
1975 | 52.90 | 56.18 | 57.74 | 63.34 | a | 79.32 | 91.47 | 96.03 | 98.19 | 89.33 | 79.32 | 65.53 | 58.10 | 73.96 | ||||||||||||
1976 | 58.73 | a | 60.62 | 63.32 | 70.83 | a | 84.06 | 94.10 | 97.03 | 96.13 | 85.63 | 75.43 | a | 67.53 | 58.32 | 75.98 | ||||||||||
1977 | 52.52 | 63.25 | 62.45 | 76.93 | 77.87 | 95.53 | 98.53 | a | 96.45 | 89.38 | a | 79.00 | 67.40 | 60.13 | a | 76.62 | ||||||||||
1978 | 53.35 | 55.50 | 65.32 | 71.57 | 82.52 | 96.70 | 99.97 | 95.68 | 88.07 | 81.53 | a | 61.20 | 50.45 | 75.15 | ||||||||||||
1979 | 47.33 | a | 57.46 | 61.45 | 74.43 | 79.26 | 93.87 | 99.35 | 94.35 | 94.97 | 82.58 | 61.17 | 59.39 | 75.47 | ||||||||||||
1980 | 53.77 | 59.62 | 61.16 | 74.00 | 77.42 | 96.33 | 100.52 | 96.06 | 92.37 | 79.90 | 68.50 | 63.71 | 76.95 | |||||||||||||
1981 | 60.81 | 65.36 | 64.65 | 78.90 | 83.52 | 99.03 | 99.90 | 97.32 | 89.17 | 74.45 | 67.93 | 59.10 | 78.34 | |||||||||||||
1982 | 53.33 | a | 58.89 | 61.58 | 74.90 | 80.61 | 89.93 | 94.32 | 92.42 | 85.90 | 75.20 | a | 61.00 | 54.45 | 73.55 | |||||||||||
1983 | 58.39 | 58.41 | a | 61.23 | 63.83 | a | 80.29 | 90.15 | c | 94.65 | 91.39 | 90.24 | a | 74.65 | 61.93 | 55.83 | a | 73.41 | ||||||||
1984 | 59.00 | 62.11 | b | 68.00 | 70.90 | a | 90.10 | 90.70 | 94.77 | a | 90.77 | 89.03 | a | 70.00 | 63.73 | 51.42 | 75.04 | |||||||||
1985 | 53.71 | c | 59.44 | c | 60.83 | a | 76.52 | e | 82.48 | 96.00 | 97.55 | 96.50 | a | 82.86 | a | 74.65 | 60.75 | b | 59.48 | 75.07 | ||||||
1986 | 66.43 | a | 63.00 | b | 69.03 | a | 73.07 | b | 83.17 | a | 92.80 | 90.94 | 92.43 | a | 79.41 | a | 72.83 | a | 65.14 | a | 57.97 | b | 75.52 | |||
1987 | 55.86 | c | 58.31 | b | 62.30 | a | 77.68 | b | 80.97 | b | 95.86 | a | 96.10 | 93.37 | a | 88.93 | 81.03 | 62.90 | a | 54.58 | e | 75.66 | ||||
1988 | 54.93 | d | 64.12 | d | 68.19 | 72.17 | a | 81.33 | a | 94.07 | b | 98.55 | 93.45 | 87.66 | a | 84.03 | 66.61 | b | 58.14 | b | 76.94 | |||||
1989 | 57.14 | i | 61.26 | i | 74.09 | h | 82.81 | i | 86.23 | e | 95.34 | a | 100.29 | c | 94.03 | a | 89.59 | c | 77.04 | c | 68.81 | c | 58.11 | l | 87.33 | e |
1990 | 57.00 | j | 57.35 | k | 67.10 | k | 73.35 | j | 80.90 | j | 98.24 | i | 95.38 | j | 92.83 | g | 89.31 | n | 79.23 | i | 64.33 | l | 52.31 | b | 52.31 | k |
1991 | 57.31 | b | 68.80 | c | 57.38 | e | 72.75 | b | 80.96 | h | 89.36 | b | 97.83 | a | 95.67 | a | 88.86 | b | 81.69 | b | 64.80 | e | 55.00 | a | 75.40 | a |
1992 | 55.62 | e | 59.58 | e | 62.32 | f | 77.50 | 80.64 | c | 89.00 | f | 92.90 | b | 91.69 | e | 87.77 | 79.76 | b | 62.28 | a | 52.57 | c | 74.03 | b | ||
1993 | 54.00 | b | 55.52 | a | 67.00 | b | 75.67 | 84.75 | g | 92.23 | 96.07 | d | 93.03 | a | 90.13 | 76.00 | a | 60.67 | 57.48 | 74.35 | a | |||||
1994 | 61.75 | g | 58.29 | d | 67.56 | d | 73.93 | c | 80.77 | a | 94.70 | 95.29 | 94.69 | b | 88.12 | d | 74.21 | c | 58.25 | f | 57.36 | c | 78.49 | b | ||
1995 | 53.71 | c | 66.72 | c | 65.17 | a | 68.89 | c | 77.54 | g | 90.64 | e | 97.26 | 96.10 | b | 89.15 | d | 81.32 | c | 72.33 | 61.42 | g | 78.13 | b | ||
1996 | 60.33 | j | 65.44 | d | 68.86 | c | 78.30 | c | 86.63 | d | 96.07 | c | 97.25 | c | 95.33 | a | 83.15 | c | 78.30 | d | 66.54 | f | 59.50 | c | 80.88 | b |
1997 | 54.84 | f | 61.71 | d | 72.67 | a | 71.46 | d | 86.93 | a | 89.32 | b | 96.60 | a | 94.17 | b | 88.66 | a | 77.27 | a | 66.79 | a | 54.17 | a | 78.16 | a |
1998 | 57.89 | c | 53.23 | f | 62.30 | d | 67.16 | e | 78.00 | f | 87.68 | b | 94.52 | b | 94.90 | b | 86.12 | d | 76.12 | e | 66.93 | a | 59.71 | c | 75.33 | b |
1999 | 62.38 | b | 67.08 | b | 70.64 | f | 67.46 | d | 81.43 | a | 90.83 | 91.69 | b | 92.81 | d | 87.32 | e | 83.83 | a | 74.90 | 59.62 | b | 78.12 | a | ||
2000 | 61.21 | b | 64.92 | c | 65.10 | b | 79.96 | e | 88.85 | e | 94.80 | e | 98.10 | a | 93.85 | e | 91.92 | d | 72.48 | d | 57.97 | 61.62 | b | 77.56 | ||
2001 | 53.87 | a | 59.52 | g | 67.89 | c | 73.00 | d | 89.79 | b | 94.59 | c | 93.83 | b | 93.32 | 92.57 | b | 81.90 | a | 68.03 | 56.30 | a | 78.65 | a | ||
2002 | 58.89 | c | 65.27 | b | 68.46 | e | 77.45 | a | 85.10 | b | 97.62 | a | 100.74 | d | 96.07 | a | 87.34 | a | 75.96 | d | 67.65 | d | 57.31 | b | 78.16 | |
2003 | 67.59 | b | 57.15 | b | 64.06 | 69.63 | c | 86.90 | a | 93.77 | 101.10 | 95.86 | c | 91.93 | a | 86.16 | 63.31 | a | 58.77 | a | 78.02 | |||||
2004 | 57.90 | b | 57.23 | c | 77.33 | d | 73.00 | c | 85.97 | 94.14 | b | 96.61 | 93.00 | c | 88.39 | b | 74.21 | b | 59.52 | a | 58.00 | d | 76.28 | |||
2005 | 57.89 | c | 58.20 | c | 64.18 | c | 74.32 | e | 84.20 | f | 91.23 | d | 100.10 | b | 92.07 | a | 88.65 | d | 78.48 | d | 69.07 | c | 60.63 | d | 75.89 | a |
2006 | 59.90 | 64.86 | 60.10 | 76.38 | d | 87.58 | 96.31 | a | 94.59 | b | 90.23 | a | 84.04 | b | 74.36 | f | 70.12 | e | 58.23 | e | 76.58 | a | ||||
2007 | 52.44 | f | 61.65 | b | 71.17 | b | 74.74 | c | 85.73 | a | 95.17 | a | 97.00 | b | 93.93 | b | 88.24 | a | 79.50 | c | 73.56 | c | 54.76 | f | 82.07 | b |
2008 | 52.33 | d | 59.19 | b | 68.80 | f | 76.22 | c | 80.43 | c | 96.07 | a | 96.57 | a | 94.90 | a | 89.03 | 81.64 | c | 70.00 | b | 56.14 | b | 77.50 | a | |
2009 | 60.52 | b | 60.84 | c | 68.94 | 73.92 | d | 86.76 | b | 88.39 | b | 98.97 | a | 96.90 | a | 89.03 | 76.26 | d | 71.04 | c | 52.07 | d | 76.97 | |||
2010 | 56.27 | e | 57.12 | c | 64.23 | a | 72.41 | a | 80.52 | 93.70 | 95.10 | 92.64 | c | ----- | z | ----- | z | ----- | z | ----- | z | 76.50 | d | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.06 | 60.17 | 64.45 | 72.83 | 82.66 | 92.44 | 96.12 | 93.46 | 88.39 | 77.90 | 65.61 | 56.51 | 75.78 | |||||||||||||
S.D. | 4.47 | 4.36 | 4.66 | 3.78 | 3.32 | 3.24 | 2.51 | 2.28 | 2.82 | 3.98 | 4.29 | 3.57 | 1.34 | |||||||||||||
SKEW | -0.39 | 0.05 | -0.14 | -0.35 | 0.11 | -0.11 | 0.04 | -0.24 | -0.54 | -0.05 | 0.08 | -0.07 | -0.05 | |||||||||||||
MAX | 67.59 | 68.80 | 77.33 | 79.96 | 90.10 | 99.63 | 101.10 | 98.19 | 94.97 | 86.16 | 74.90 | 65.21 | 78.34 | |||||||||||||
MIN | 40.07 | 51.58 | 51.81 | 63.34 | 74.74 | 84.40 | 90.94 | 87.79 | 79.41 | 69.97 | 57.83 | 48.87 | 73.26 | |||||||||||||
YRS | 57 | 58 | 57 | 62 | 57 | 61 | 64 | 64 | 61 | 60 | 57 | 61 | 33 |