| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.62 | b | 67.84 | 67.93 | a | 61.37 | a | 51.03 | 45.14 | b | 60.15 | |||
| 1949 | 40.97 | a | 46.78 | a | 53.58 | 58.90 | 63.55 | 63.93 | c | 66.32 | 69.58 | 68.24 | a | 58.97 | 61.60 | 48.90 | 58.44 | |||||||||
| 1950 | 40.35 | 49.96 | a | 50.77 | 56.23 | 60.46 | e | 66.38 | a | 66.59 | b | 69.21 | c | 65.63 | 58.63 | a | 54.23 | 55.00 | 57.79 | |||||||
| 1951 | 47.23 | a | 51.82 | 50.23 | a | 57.97 | 61.00 | a | 64.23 | 68.42 | 66.94 | 65.83 | 61.77 | a | 55.23 | 46.77 | 58.12 | |||||||||
| 1952 | 44.94 | 49.10 | 50.03 | a | 57.52 | a | 60.97 | a | 62.30 | 67.10 | 67.58 | 67.69 | a | 65.77 | 55.93 | 50.32 | 58.27 | |||||||||
| 1953 | 53.00 | j | 51.08 | b | 53.86 | b | 56.32 | b | 61.48 | ----- | z | 67.27 | a | 68.94 | 68.00 | a | 63.71 | 55.90 | 50.90 | 59.75 | ||||||
| 1954 | 46.77 | 53.61 | 52.65 | 55.17 | 60.65 | 63.12 | n | 63.77 | a | 67.00 | 66.45 | a | 63.35 | 57.37 | 50.29 | 57.92 | ||||||||||
| 1955 | 48.19 | 48.15 | a | 48.10 | 51.97 | 57.41 | b | 62.62 | n | 64.06 | 64.23 | 65.37 | 60.00 | 49.90 | a | 49.16 | 55.14 | |||||||||
| 1956 | 48.42 | 44.38 | 51.17 | a | 58.17 | 63.19 | 63.30 | 68.77 | 67.40 | a | 66.87 | 59.03 | 56.03 | 51.71 | 58.20 | |||||||||||
| 1957 | 43.68 | 52.39 | 54.00 | 56.93 | 61.48 | 66.21 | a | 68.13 | 69.06 | 74.63 | 62.77 | a | 58.13 | 52.55 | 60.00 | |||||||||||
| 1958 | 54.39 | 57.32 | 54.48 | 58.93 | 64.68 | 68.17 | 70.58 | 70.74 | 69.60 | 65.65 | 54.60 | 55.16 | 62.02 | |||||||||||||
| 1959 | 50.68 | 50.43 | 53.94 | 58.00 | 62.94 | 64.47 | 68.32 | 66.55 | 64.60 | 62.90 | 56.77 | 52.29 | 59.32 | |||||||||||||
| 1960 | 47.19 | 52.28 | 52.87 | 57.83 | 59.52 | 63.73 | 66.61 | 66.87 | 68.03 | 63.06 | 55.37 | 52.45 | 58.82 | |||||||||||||
| 1961 | 54.94 | 52.86 | 53.65 | 56.27 | 60.55 | 67.37 | 70.39 | 68.42 | 65.97 | 61.13 | 53.37 | 49.32 | 59.52 | |||||||||||||
| 1962 | 48.32 | 52.43 | 51.87 | 57.90 | 57.06 | 62.57 | 64.45 | 69.03 | 66.23 | 62.90 | 57.27 | 53.71 | 58.65 | |||||||||||||
| 1963 | 46.23 | 58.89 | 53.77 | 55.30 | 61.61 | 62.83 | 66.65 | 66.81 | 70.63 | 63.52 | 54.67 | 53.65 | 59.55 | |||||||||||||
| 1964 | 49.55 | 51.41 | 51.77 | 53.73 | 57.97 | 62.67 | 66.42 | 66.87 | 66.47 | 65.16 | 53.13 | 47.19 | 57.70 | |||||||||||||
| 1965 | 50.84 | 51.29 | 58.13 | 57.33 | 56.87 | 61.77 | 66.70 | a | 69.61 | 66.33 | 65.19 | 56.10 | 47.74 | 58.99 | ||||||||||||
| 1966 | 50.71 | 51.18 | 53.35 | 59.00 | 59.10 | 66.43 | 64.87 | 68.58 | 70.20 | 62.71 | 55.13 | 51.23 | 59.37 | |||||||||||||
| 1967 | 50.00 | 51.75 | 50.81 | 53.37 | 60.81 | 65.17 | 68.35 | 71.58 | 72.57 | 62.68 | 56.60 | 47.48 | 59.26 | |||||||||||||
| 1968 | 48.68 | 58.52 | 56.90 | 53.93 | 60.32 | 64.57 | 68.23 | 68.03 | 68.17 | 60.55 | 54.77 | 46.65 | 59.11 | |||||||||||||
| 1969 | 42.94 | 48.25 | 55.42 | 56.47 | 64.53 | a | 66.17 | 65.45 | 67.42 | 66.10 | 61.65 | 56.20 | 51.94 | 58.54 | ||||||||||||
| 1970 | 49.48 | 57.93 | 55.32 | 53.80 | 61.55 | 66.37 | 66.52 | 66.55 | 65.13 | 61.29 | 54.20 | 47.16 | 58.77 | |||||||||||||
| 1971 | 47.19 | 50.32 | 50.35 | 57.00 | 60.19 | 61.97 | 64.00 | 70.03 | 67.17 | 60.35 | 53.03 | 46.48 | 57.34 | |||||||||||||
| 1972 | 45.87 | 50.55 | 54.81 | 54.80 | 63.10 | 66.03 | 71.58 | 73.23 | 68.53 | 63.39 | 55.37 | 46.10 | 59.45 | |||||||||||||
| 1973 | 47.77 | 56.61 | 54.65 | 58.67 | 63.65 | 66.97 | 68.71 | 66.26 | 71.87 | 61.77 | 51.63 | 52.35 | 60.08 | |||||||||||||
| 1974 | 47.29 | 50.32 | 54.13 | 57.97 | 59.71 | 65.10 | 68.06 | 69.03 | 72.20 | 64.39 | 56.03 | 51.87 | 59.68 | |||||||||||||
| 1975 | 49.94 | 51.36 | 52.71 | 54.03 | 61.26 | 63.23 | 66.90 | 65.32 | 71.47 | 59.32 | 53.50 | 50.48 | 58.29 | |||||||||||||
| 1976 | 51.87 | 52.41 | 52.32 | 57.73 | 62.48 | 63.37 | 68.71 | 68.55 | 70.57 | 66.03 | 60.30 | 53.06 | 60.62 | |||||||||||||
| 1977 | 53.48 | 57.61 | 52.84 | 58.50 | 60.48 | 65.57 | 67.65 | 69.61 | 65.43 | 62.16 | 51.77 | 50.77 | 59.66 | |||||||||||||
| 1978 | 51.52 | 54.18 | 57.06 | 57.23 | 60.77 | 68.33 | 68.74 | 69.71 | 67.73 | 67.52 | 51.93 | 46.19 | 60.08 | |||||||||||||
| 1979 | 44.42 | 49.29 | 57.55 | 57.97 | ----- | z | 64.63 | 69.48 | 68.52 | 75.17 | 65.74 | 56.20 | 53.35 | 60.21 | ||||||||||||
| 1980 | 48.35 | 55.07 | 53.03 | 59.60 | 59.87 | 62.67 | 67.32 | 65.68 | 68.53 | 65.74 | 56.03 | 53.03 | 59.58 | |||||||||||||
| 1981 | 56.26 | 55.54 | 57.16 | 57.97 | 60.71 | 64.60 | 67.26 | 70.48 | 68.93 | 62.23 | 57.03 | 52.16 | 60.86 | |||||||||||||
| 1982 | 47.26 | 51.43 | 52.97 | 55.20 | 60.77 | 62.90 | 64.87 | 67.55 | 69.37 | 64.06 | 54.80 | 51.10 | 58.52 | |||||||||||||
| 1983 | 53.74 | 55.64 | 57.61 | 60.23 | 62.52 | 64.87 | 68.68 | 69.48 | 68.03 | 62.81 | 55.03 | 45.52 | 60.35 | |||||||||||||
| 1984 | 52.81 | 55.72 | 57.42 | 56.17 | 60.32 | 61.93 | 67.10 | 69.61 | 68.87 | 59.16 | 53.30 | 47.10 | 59.13 | |||||||||||||
| 1985 | 52.32 | 49.29 | 52.45 | 55.93 | 62.26 | 65.77 | 68.26 | 69.19 | 66.20 | 59.00 | 46.33 | 51.35 | 58.20 | |||||||||||||
| 1986 | 55.16 | 52.75 | 58.68 | 55.63 | 61.10 | 66.80 | 65.13 | 67.35 | 64.00 | 62.06 | 54.60 | 52.94 | 59.68 | |||||||||||||
| 1987 | 51.03 | 54.86 | 56.52 | 59.53 | 62.26 | 65.20 | 65.13 | 68.32 | 66.33 | 66.67 | a | 57.37 | 47.74 | 60.08 | ||||||||||||
| 1988 | 49.29 | 53.66 | 53.97 | 55.97 | 60.48 | 64.23 | 68.03 | a | 68.00 | a | 68.30 | 62.77 | 53.53 | 51.06 | 59.11 | |||||||||||
| 1989 | 48.29 | 44.39 | 51.74 | 62.00 | 60.29 | 65.80 | 65.52 | 66.16 | 72.37 | 61.10 | 54.83 | 51.00 | 58.62 | |||||||||||||
| 1990 | 49.84 | 50.11 | 55.29 | 57.63 | 59.45 | 63.77 | 67.84 | 69.61 | 69.37 | 59.90 | 53.67 | 42.87 | 58.28 | |||||||||||||
| 1991 | 49.10 | 57.43 | 51.81 | 53.77 | 56.13 | 60.27 | 67.13 | 65.55 | 72.33 | 63.35 | 55.20 | 50.52 | 58.55 | |||||||||||||
| 1992 | 51.90 | 57.45 | 56.90 | 59.17 | 64.13 | 65.67 | 70.90 | 75.26 | 69.47 | 64.13 | 56.13 | 47.94 | 61.59 | |||||||||||||
| 1993 | 47.42 | 53.11 | 56.29 | 57.77 | 65.48 | 65.87 | 66.52 | 71.42 | 67.73 | 63.77 | 53.13 | 51.65 | 60.01 | |||||||||||||
| 1994 | 53.81 | 50.50 | 57.81 | 57.57 | 62.45 | 63.90 | 65.84 | 70.74 | 70.57 | 61.26 | 50.47 | 49.61 | 59.54 | |||||||||||||
| 1995 | 52.77 | 55.29 | 56.23 | 57.23 | 60.48 | 65.93 | 70.26 | 67.90 | 70.30 | 62.00 | 58.13 | 51.84 | 60.70 | |||||||||||||
| 1996 | 49.65 | 53.55 | 56.16 | 58.40 | 58.94 | 63.47 | 68.06 | 68.45 | 65.50 | 61.06 | 53.67 | 50.84 | 58.98 | |||||||||||||
| 1997 | 51.16 | 53.11 | 53.61 | 57.40 | 67.16 | 65.43 | 68.23 | 72.26 | 70.27 | 60.19 | 58.20 | 51.55 | 60.71 | |||||||||||||
| 1998 | 52.10 | 54.61 | 55.16 | 56.93 | 59.68 | 62.03 | 67.35 | 68.68 | 68.47 | 63.10 | 54.47 | 47.48 | 59.17 | |||||||||||||
| 1999 | 50.13 | 49.89 | 52.26 | 56.17 | 57.94 | 62.17 | 64.58 | 67.87 | 66.97 | 62.58 | 58.63 | 54.16 | 58.61 | |||||||||||||
| 2000 | 48.39 | 54.34 | 54.65 | 60.70 | 60.74 | 66.53 | 67.68 | 67.45 | 69.13 | 62.77 | 53.10 | 52.68 | 59.85 | |||||||||||||
| 2001 | 52.45 | 52.46 | 54.58 | 55.37 | 63.52 | 63.63 | 63.39 | 67.68 | 66.37 | 60.55 | 55.87 | 50.13 | 58.83 | |||||||||||||
| 2002 | 48.77 | 52.64 | 51.19 | 55.77 | 57.68 | 64.27 | 67.77 | 68.45 | 68.70 | 61.74 | 58.07 | 51.74 | 58.90 | |||||||||||||
| 2003 | 55.81 | 52.89 | 54.61 | 56.50 | 61.16 | 68.07 | 69.58 | 69.58 | 70.03 | 63.26 | 53.17 | 51.26 | 60.49 | |||||||||||||
| 2004 | 49.35 | 54.48 | 56.26 | 62.57 | 61.42 | 66.47 | 71.58 | 69.16 | 66.47 | 62.29 | 54.50 | 51.58 | 60.51 | |||||||||||||
| 2005 | 52.16 | 56.46 | 59.35 | 57.43 | 64.13 | 63.90 | 69.26 | 67.87 | 64.63 | 61.16 | 53.57 | 50.77 | 60.06 | |||||||||||||
| 2006 | 52.32 | 51.36 | 52.13 | 57.10 | ----- | z | 65.33 | 66.84 | 63.97 | 66.70 | 60.19 | 52.70 | 51.45 | 58.19 | ||||||||||||
| 2007 | 48.71 | 53.00 | 64.13 | 68.41 | m | 62.00 | i | 64.70 | 70.61 | 70.29 | 68.00 | 61.35 | 55.60 | 49.58 | 60.60 | |||||||||||
| 2008 | 47.81 | 53.00 | 52.00 | 55.23 | 62.77 | 61.97 | 67.90 | 68.39 | 69.40 | 63.00 | 58.67 | 48.00 | 59.01 | |||||||||||||
| 2009 | 52.48 | 53.68 | 51.97 | 56.67 | 61.68 | 64.77 | 68.42 | 68.48 | 70.17 | 61.10 | 55.53 | 48.55 | 59.46 | |||||||||||||
| 2010 | 54.32 | 56.64 | 56.45 | 55.83 | 58.58 | 62.57 | 66.48 | 66.74 | 66.70 | g | 67.27 | t | ----- | z | ----- | z | 59.70 | |||||||||
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2012 | ----- | z | ----- | z | ----- | z | 57.00 | z | 59.67 | a | 63.07 | 65.90 | 68.30 | a | 66.66 | a | 62.29 | 56.30 | 48.90 | 61.39 | ||||||
| 2013 | 48.87 | 50.93 | 53.07 | b | 62.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.96 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 49.64 | 52.69 | 54.23 | 57.02 | 61.05 | 64.54 | 67.42 | 68.45 | 68.33 | 62.40 | 55.00 | 50.21 | 59.33 | |||||||||||||
| S.D. | 3.38 | 3.14 | 2.72 | 2.02 | 2.17 | 1.80 | 1.89 | 1.96 | 2.42 | 2.03 | 2.50 | 2.62 | 0.96 | |||||||||||||
| SKEW | -0.42 | -0.25 | 0.69 | 0.14 | 0.20 | 0.02 | 0.02 | 0.61 | 0.62 | 0.31 | -0.40 | -0.48 | 0.36 | |||||||||||||
| MAX | 56.26 | 58.89 | 64.13 | 62.57 | 67.16 | 68.33 | 71.58 | 75.26 | 75.17 | 67.52 | 61.60 | 55.16 | 62.02 | |||||||||||||
| MIN | 40.35 | 44.38 | 48.10 | 51.97 | 56.13 | 60.27 | 63.39 | 63.97 | 64.00 | 58.63 | 46.33 | 42.87 | 57.34 | |||||||||||||
| NO YRS | 62 | 63 | 63 | 61 | 60 | 60 | 64 | 64 | 63 | 63 | 63 | 63 | 55 | |||||||||||||