YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | 62.55 | 67.73 | 71.61 | 74.52 | 69.30 | 66.81 | 57.43 | 53.83 | a | 65.47 | d | |||||||
1938 | 52.06 | 53.57 | 55.00 | 59.10 | 63.32 | 66.47 | 70.65 | 69.87 | 70.10 | a | 66.52 | 54.03 | 51.35 | 61.00 | ||||||||||||
1939 | 50.03 | 50.82 | 56.71 | 63.13 | 65.13 | 65.33 | 70.32 | 69.55 | 73.50 | 65.45 | 57.23 | 54.52 | 61.81 | |||||||||||||
1940 | 55.39 | 55.93 | 60.35 | 62.57 | 67.26 | 69.00 | 69.77 | 73.68 | 71.23 | 66.39 | 54.10 | 52.03 | 63.14 | |||||||||||||
1941 | 49.10 | 58.89 | 62.00 | 60.43 | 64.39 | 67.10 | 71.19 | 69.26 | 70.33 | 64.16 | 58.63 | 53.58 | 62.42 | |||||||||||||
1942 | 52.52 | 54.50 | 58.13 | 58.97 | 60.10 | 67.27 | 71.10 | 69.87 | 68.50 | 65.19 | 55.60 | 52.35 | 61.17 | |||||||||||||
1943 | 50.39 | 56.82 | 58.94 | 60.80 | 62.74 | 64.37 | 67.94 | 68.03 | a | 73.00 | 62.93 | a | 59.21 | p | 51.61 | 61.60 | a | |||||||||
1944 | 52.94 | 52.83 | 56.84 | 56.80 | 61.61 | 62.07 | 65.68 | 70.03 | 69.20 | 66.48 | 54.30 | 53.52 | 60.19 | |||||||||||||
1945 | 51.45 | 55.71 | 53.52 | 58.80 | 59.97 | 68.45 | a | 73.17 | b | 68.97 | 71.47 | 62.35 | 54.87 | 52.42 | 60.93 | |||||||||||
1946 | 49.48 | 51.54 | 54.97 | 57.27 | 61.13 | 66.10 | 68.58 | 68.52 | 70.30 | 63.72 | b | 54.00 | a | 49.71 | 59.61 | |||||||||||
1947 | 46.90 | 56.21 | 58.71 | 62.31 | a | 68.16 | 66.23 | 69.52 | 69.90 | 72.63 | 62.73 | a | 54.80 | 49.90 | 61.50 | |||||||||||
1948 | 52.23 | 50.62 | 52.87 | 54.40 | 59.07 | a | 66.10 | 68.33 | a | 68.71 | 68.40 | 62.29 | 54.80 | 46.20 | a | 58.67 | ||||||||||
1949 | 44.29 | 48.50 | 54.03 | 61.33 | 61.61 | 68.20 | 67.61 | 69.39 | 70.93 | 61.48 | 60.23 | 47.84 | 59.62 | |||||||||||||
1950 | 43.00 | g | 51.57 | 54.39 | 58.83 | a | 61.84 | 63.77 | 70.74 | 71.58 | 68.93 | 65.87 | 58.73 | 56.00 | 62.02 | a | ||||||||||
1951 | 49.52 | 53.79 | 55.84 | 56.34 | a | 63.67 | a | 65.63 | 66.77 | 69.03 | 68.03 | 65.55 | 57.13 | 50.52 | 60.15 | |||||||||||
1952 | 46.74 | 54.48 | 53.77 | 58.87 | 62.71 | 63.13 | 70.16 | 67.77 | 70.34 | a | 65.52 | 57.80 | 49.68 | 60.08 | ||||||||||||
1953 | 55.00 | 55.79 | 56.26 | 58.00 | 60.90 | 63.70 | 68.90 | 68.90 | a | 71.31 | a | 66.65 | 58.30 | 52.32 | 61.34 | |||||||||||
1954 | 50.90 | 58.21 | 56.23 | 61.90 | 62.97 | 63.60 | 67.19 | 67.68 | 69.57 | 65.16 | 58.37 | 51.00 | 61.06 | |||||||||||||
1955 | 49.52 | 52.93 | 56.42 | 54.73 | 61.10 | 65.50 | 65.19 | 66.81 | 70.40 | 63.90 | 55.10 | 52.61 | 59.52 | |||||||||||||
1956 | 51.90 | 50.62 | 56.39 | 58.67 | 62.97 | 65.60 | 67.43 | a | 68.81 | 70.87 | 63.84 | 58.00 | 50.32 | 60.45 | ||||||||||||
1957 | 47.97 | 54.96 | a | 55.10 | 59.70 | 64.29 | 68.40 | 69.13 | 69.61 | 72.70 | 66.45 | 56.93 | 54.37 | a | 61.63 | |||||||||||
1958 | 54.87 | 58.68 | 56.19 | 60.40 | 66.45 | 69.77 | 70.65 | 73.65 | 76.23 | 67.48 | 58.10 | 55.90 | 64.03 | |||||||||||||
1959 | 53.40 | a | 54.61 | 58.97 | b | 61.47 | 62.94 | 66.10 | a | 70.06 | 71.48 | 70.27 | d | 66.74 | d | 59.12 | e | 52.32 | f | 63.20 | a | |||||
1960 | 52.00 | d | 55.37 | b | 56.50 | c | 59.34 | a | 60.61 | 69.10 | a | 68.31 | b | 69.22 | d | 67.90 | 64.10 | 56.37 | 54.28 | b | 61.09 | |||||
1961 | 55.48 | 56.74 | a | 55.90 | a | 59.77 | 59.00 | a | 67.36 | b | 69.25 | g | 70.48 | d | 70.70 | 64.84 | 55.19 | d | 51.50 | a | 60.63 | a | ||||
1962 | 52.87 | 53.71 | 54.10 | 60.77 | 61.39 | 63.97 | 68.35 | 69.32 | 67.37 | c | 64.83 | g | 58.52 | a | 55.06 | 60.49 | a | |||||||||
1963 | 52.32 | 60.82 | 55.77 | 56.37 | 62.06 | 64.79 | b | 69.44 | d | 68.35 | 72.82 | b | 65.55 | 56.36 | b | 53.63 | a | 61.52 | ||||||||
1964 | 50.50 | a | 58.46 | a | 54.52 | 56.07 | 59.29 | 63.87 | 67.71 | 69.16 | 71.73 | 67.87 | 55.15 | d | 51.77 | 60.51 | ||||||||||
1965 | 51.69 | b | 55.18 | 58.84 | 59.25 | b | 59.81 | 63.07 | 65.97 | 70.43 | a | 66.93 | c | 68.00 | 59.34 | a | 51.23 | 60.81 | ||||||||
1966 | 52.19 | 54.25 | 55.39 | 61.90 | ----- | z | 66.12 | f | 67.58 | 70.37 | a | 72.66 | a | 65.68 | c | 58.07 | 53.71 | 61.18 | b | |||||||
1967 | 51.57 | a | 56.59 | a | 54.58 | 54.21 | a | 63.43 | a | 64.87 | 68.19 | 70.93 | c | 74.24 | a | 68.06 | 59.87 | 50.80 | a | 61.45 | ||||||
1968 | 51.77 | 59.14 | 59.68 | 58.17 | 61.87 | 66.79 | b | 67.96 | c | 71.03 | b | 70.73 | 64.07 | c | 55.68 | b | 49.32 | c | 61.35 | |||||||
1969 | 49.21 | b | 51.08 | b | 59.61 | 57.97 | a | 65.07 | a | 64.21 | b | 66.52 | 68.43 | a | 70.47 | 66.23 | a | 61.25 | f | 53.88 | e | 61.15 | a | |||
1970 | 54.60 | a | 61.33 | a | 58.58 | 56.63 | 63.31 | b | 65.38 | a | 67.90 | 67.63 | a | 72.50 | 64.77 | 59.54 | b | 50.57 | a | 61.90 | ||||||
1971 | 51.55 | 53.89 | 55.23 | 55.70 | 59.10 | b | 63.53 | 66.55 | 70.87 | 71.53 | 61.72 | f | 56.20 | 48.29 | 59.31 | a | ||||||||||
1972 | 49.45 | 55.69 | 58.61 | 57.93 | 62.47 | a | 64.77 | 67.68 | 72.20 | a | 65.68 | k | 66.40 | a | 57.50 | 47.90 | 60.05 | a | ||||||||
1973 | 50.23 | a | 57.19 | a | 54.68 | 62.70 | 63.53 | a | 69.03 | a | 68.06 | 66.97 | 72.43 | 64.22 | d | 53.72 | a | 53.50 | c | 61.36 | ||||||
1974 | 52.57 | c | 53.57 | 57.42 | 60.13 | 61.32 | 65.83 | a | 69.97 | 70.40 | a | 72.48 | c | 69.71 | 58.47 | 52.58 | 62.04 | |||||||||
1975 | 53.55 | 54.14 | 56.10 | 55.14 | a | 64.87 | 66.37 | 68.41 | b | 68.90 | 68.18 | b | 62.11 | d | 55.63 | 53.48 | 60.57 | |||||||||
1976 | 53.58 | 54.17 | 55.28 | b | 57.41 | a | 64.60 | a | 65.43 | 69.35 | 69.23 | 70.76 | a | 68.31 | e | 60.78 | c | 52.59 | b | 61.79 | ||||||
1977 | 54.41 | b | 60.36 | 54.27 | a | 59.33 | 60.52 | 64.90 | a | 67.90 | b | 67.23 | 67.76 | a | 64.30 | a | 56.23 | 55.81 | e | 61.08 | ||||||
1978 | 55.87 | a | 55.25 | 61.90 | 60.41 | a | 65.10 | b | 66.28 | a | 68.67 | a | 72.45 | 70.10 | 68.23 | 57.22 | c | 50.42 | 62.66 | |||||||
1979 | 51.97 | b | 52.29 | 58.03 | a | 60.00 | 65.26 | ----- | z | 70.77 | 70.55 | 75.50 | 65.97 | 56.93 | 53.73 | a | 61.91 | a | ||||||||
1980 | 54.10 | 59.00 | 56.23 | 61.90 | ----- | z | 64.34 | a | ----- | z | ----- | z | 71.18 | b | 67.71 | 58.37 | 55.42 | 60.92 | c | |||||||
1981 | 57.71 | 58.46 | 58.39 | 59.77 | 62.10 | 67.77 | 68.29 | 68.10 | 69.66 | a | 63.35 | 58.77 | 54.32 | 62.22 | ||||||||||||
1982 | 49.32 | 56.38 | b | 55.93 | b | 59.76 | a | 62.90 | b | 63.63 | 66.33 | a | 69.67 | a | 71.14 | a | 67.41 | b | 56.40 | 52.19 | 60.92 | |||||
1983 | 53.46 | g | 55.54 | b | 58.26 | 59.59 | a | 63.16 | 66.93 | c | 68.26 | ----- | z | 72.16 | e | 66.10 | 55.21 | b | 51.71 | 61.69 | b | |||||
1984 | 55.00 | 55.24 | 59.50 | a | 57.97 | 63.60 | a | 64.17 | 71.06 | 69.97 | 72.90 | 62.71 | 54.70 | 49.55 | 61.36 | |||||||||||
1985 | 53.84 | 56.07 | 54.55 | 60.66 | a | 62.53 | a | 69.79 | a | 71.18 | c | 70.38 | b | 68.00 | j | 66.23 | a | ----- | z | 51.54 | c | 61.68 | b | |||
1986 | 56.77 | 56.46 | b | 60.87 | ----- | z | 62.71 | 67.11 | b | 70.10 | a | 69.55 | b | 68.00 | 65.17 | a | ----- | z | ----- | z | 64.08 | c | ||||
1987 | ----- | z | 57.83 | d | 59.42 | 62.88 | e | 67.07 | a | 68.31 | a | 68.28 | b | ----- | z | ----- | z | 68.71 | c | ----- | z | ----- | z | 64.64 | e | |
1988 | 55.71 | ----- | z | 61.39 | c | ----- | z | 64.89 | c | 66.00 | 72.24 | b | 68.83 | b | 68.24 | e | 64.96 | d | 56.58 | d | 51.54 | c | 63.04 | b | ||
1989 | 51.24 | b | 48.09 | f | 56.03 | b | 66.23 | 63.57 | a | 67.11 | b | 67.52 | d | 70.03 | a | 69.20 | 64.38 | e | 58.47 | 54.57 | h | 63.38 | b | |||
1990 | 52.93 | b | 52.12 | d | 59.38 | g | 60.61 | b | 64.48 | 67.79 | a | 71.90 | 71.92 | e | 73.38 | f | 67.71 | 57.53 | 46.15 | e | 61.32 | b | ||||
1991 | 52.29 | 51.25 | x | 53.19 | o | 58.48 | a | 63.28 | b | 62.90 | 66.90 | a | 66.65 | 74.40 | 69.68 | 60.03 | a | 53.10 | 62.77 | b | ||||||
1992 | 54.42 | 59.69 | 61.29 | 65.33 | 68.13 | 67.28 | a | 70.59 | d | 69.23 | a | 70.50 | 69.65 | 58.23 | 49.89 | d | 63.69 | |||||||||
1993 | 51.00 | 55.11 | 57.93 | a | 58.10 | 57.42 | e | 57.69 | d | 67.10 | a | 71.07 | d | 68.87 | 66.04 | g | 59.87 | 52.37 | a | 59.68 | a | |||||
1994 | 54.26 | 53.52 | c | 60.84 | 61.03 | 62.55 | 65.76 | a | 67.57 | a | 72.10 | 72.20 | 67.32 | 51.33 | 49.81 | 61.52 | ||||||||||
1995 | 54.68 | 59.14 | 56.42 | 59.27 | 61.32 | 65.22 | c | 69.83 | a | 71.77 | 71.30 | 68.59 | b | 60.15 | c | 57.14 | c | 62.90 | ||||||||
1996 | 53.93 | a | 58.23 | c | 61.19 | d | 61.23 | 63.68 | 66.90 | 71.45 | 71.37 | a | 71.38 | a | 64.84 | f | 60.08 | e | 55.00 | f | 63.94 | b | ||||
1997 | 53.04 | d | 56.91 | e | 59.60 | f | 61.42 | f | 67.08 | f | 68.24 | e | 71.33 | a | 73.17 | b | 74.37 | c | 66.42 | l | 59.77 | d | 53.58 | g | 65.26 | e |
1998 | 54.17 | g | 55.00 | k | 58.65 | 59.74 | c | 60.69 | b | 65.53 | 67.23 | 68.90 | a | 71.21 | b | 65.62 | b | 56.90 | 54.14 | c | 62.86 | b | ||||
1999 | 53.97 | a | ----- | z | 54.34 | b | 58.81 | c | ----- | z | 62.61 | b | 63.92 | e | 67.41 | d | 68.15 | c | 63.90 | 57.77 | d | 51.60 | a | 60.25 | b | |
2000 | 52.78 | d | 55.28 | d | 55.32 | 60.23 | 61.62 | b | 68.08 | f | 65.69 | b | 68.19 | 71.27 | ----- | z | ----- | z | ----- | z | 61.30 | d | ||||
2001 | 53.50 | a | ----- | z | ----- | z | ----- | z | ----- | z | 64.54 | b | 60.90 | 65.54 | c | 66.33 | c | 63.12 | o | 57.07 | b | 52.31 | e | 60.03 | e | |
2002 | 51.58 | 54.93 | a | 54.68 | c | 59.57 | b | 59.23 | 63.59 | a | 68.24 | b | 69.57 | a | 71.27 | 65.17 | a | 58.48 | a | 53.69 | e | 60.83 | ||||
2003 | 55.61 | c | 55.11 | 56.83 | b | 56.75 | b | 61.03 | 66.27 | 69.13 | 69.06 | 70.15 | d | 65.83 | a | ----- | z | 51.12 | g | 62.58 | b | |||||
2004 | 51.19 | d | 53.93 | b | 61.86 | b | 62.80 | 62.71 | 65.11 | b | 70.29 | ----- | z | 69.63 | 63.39 | c | ----- | z | ----- | z | 62.32 | c | ||||
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.42 | 67.10 | 63.27 | i | 53.88 | e | 51.69 | e | 60.27 | h | ||
2006 | 52.08 | g | 54.63 | a | 51.93 | b | 56.57 | 63.61 | 66.37 | 70.27 | a | 66.73 | a | 67.13 | 63.83 | a | ----- | z | 51.04 | g | 62.34 | c | ||||
2007 | 49.61 | h | 53.38 | b | 57.48 | d | 58.40 | 60.79 | c | 62.44 | l | ----- | z | ----- | z | ----- | z | 65.91 | i | 58.30 | c | 50.66 | b | 56.50 | f | |
2008 | 48.54 | c | 52.48 | b | 54.39 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.80 | i |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | 61.70 | a | 64.77 | 65.86 | b | 69.87 | 71.64 | e | 63.47 | a | 55.04 | f | 48.96 | e | 63.75 | e | ||
2010 | 52.62 | j | 55.16 | i | 56.00 | l | 58.17 | g | 59.73 | e | 63.79 | f | 66.14 | i | 67.37 | d | 70.25 | f | 65.00 | g | 52.64 | h | 52.70 | h | 63.55 | j |
2011 | 52.60 | a | 53.61 | 54.59 | b | 60.62 | f | 59.17 | g | 63.15 | j | 67.55 | b | 67.00 | b | ----- | z | ----- | z | 61.00 | b | ----- | z | 59.39 | f | |
2012 | ----- | z | 59.33 | e | ----- | z | ----- | z | ----- | z | 63.15 | c | 63.84 | f | 66.00 | b | 64.38 | a | 64.74 | h | ----- | z | ----- | z | 63.22 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.21 | 55.35 | 56.94 | 59.38 | 62.60 | 65.71 | 68.64 | 69.54 | 70.56 | 65.60 | 57.19 | 51.99 | 61.28 | |||||||||||||
S.D. | 2.53 | 2.72 | 2.47 | 2.44 | 2.23 | 2.10 | 2.11 | 1.85 | 2.23 | 1.99 | 2.07 | 2.32 | 1.12 | |||||||||||||
SKEW | -0.51 | 0.04 | 0.40 | 0.17 | 0.32 | -0.58 | -0.61 | 0.37 | -0.04 | 0.11 | -0.34 | -0.29 | 0.24 | |||||||||||||
MAX | 57.71 | 61.33 | 62.00 | 66.23 | 68.16 | 69.79 | 73.17 | 74.52 | 76.23 | 69.71 | 61.00 | 57.14 | 64.03 | |||||||||||||
MIN | 44.29 | 48.50 | 51.93 | 54.21 | 57.42 | 57.69 | 60.90 | 65.54 | 64.38 | 61.48 | 51.33 | 46.15 | 58.67 | |||||||||||||
YRS | 65 | 66 | 67 | 65 | 67 | 68 | 69 | 70 | 68 | 63 | 63 | 62 | 39 |