| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.83 | y | 77.81 | 80.57 | 64.77 | 55.20 | 45.90 | 64.85 | ||||||
| 1944 | 48.87 | 49.34 | 54.84 | 57.40 | 65.71 | 69.80 | 81.65 | 79.26 | 78.93 | 68.84 | 50.23 | 43.06 | 62.33 | |||||||||||||
| 1945 | 48.13 | 49.96 | 49.16 | 56.10 | 65.39 | 72.80 | 83.23 | 81.68 | 73.60 | 63.65 | 49.63 | 47.48 | 61.73 | |||||||||||||
| 1946 | 45.32 | 48.43 | 52.10 | 60.10 | 68.45 | 70.03 | 80.03 | 80.35 | 73.57 | 55.74 | 49.73 | 45.03 | 60.74 | |||||||||||||
| 1947 | 42.19 | 53.57 | 57.29 | 62.83 | 71.26 | 68.83 | a | 77.10 | 76.81 | 73.73 | 61.23 | 51.33 | 45.84 | 61.83 | ||||||||||||
| 1948 | 45.48 | 45.69 | 50.68 | 53.87 | 63.45 | 74.33 | 77.37 | a | 74.90 | 73.66 | a | 63.58 | 47.33 | 41.65 | 59.33 | |||||||||||
| 1949 | 36.00 | a | 45.79 | 52.39 | 61.33 | 69.13 | 75.10 | a | 79.39 | 79.58 | 75.53 | 58.90 | 60.70 | 45.94 | 61.65 | |||||||||||
| 1950 | 37.19 | 47.43 | 49.26 | 57.77 | 65.77 | 70.30 | 79.90 | 84.00 | a | 78.10 | a | 61.42 | 54.27 | 52.03 | 61.45 | |||||||||||
| 1951 | 46.29 | 49.18 | 50.39 | 66.93 | 67.13 | 79.00 | 82.61 | 81.00 | 81.03 | 61.03 | 53.20 | 43.74 | 63.46 | |||||||||||||
| 1952 | 43.77 | 50.38 | 50.29 | 62.90 | 68.32 | 68.87 | 83.03 | 80.61 | 79.37 | 70.16 | 49.13 | 48.68 | 62.96 | |||||||||||||
| 1953 | 52.61 | 51.39 | 53.03 | 59.33 | 61.52 | 65.57 | 80.26 | 78.16 | 76.00 | 65.10 | 57.13 | 48.77 | 62.41 | |||||||||||||
| 1954 | 47.42 | 54.11 | 53.55 | 60.83 | 67.29 | 66.53 | 75.00 | 72.61 | 70.50 | 62.61 | 56.90 | 47.03 | 61.20 | |||||||||||||
| 1955 | 44.52 | 47.04 | 49.19 | 52.17 | 63.71 | 71.63 | 73.26 | 79.16 | 73.43 | 62.71 | 50.60 | 48.29 | 59.64 | |||||||||||||
| 1956 | 47.06 | 43.66 | 52.74 | 60.60 | 66.94 | 69.20 | 80.29 | 78.39 | 76.90 | 61.10 | 51.53 | 47.13 | 61.29 | |||||||||||||
| 1957 | 38.90 | 49.57 | 53.29 | 61.00 | 66.71 | 72.53 | 77.77 | 77.06 | 79.03 | 61.23 | 52.43 | 49.39 | 61.58 | |||||||||||||
| 1958 | 49.55 | 55.14 | 53.10 | 58.40 | 73.16 | 71.57 | 84.00 | 86.00 | 74.97 | 68.52 | 53.60 | 53.23 | 65.10 | |||||||||||||
| 1959 | 49.39 | 49.18 | 55.65 | 62.43 | 62.45 | 72.23 | 82.52 | 81.13 | 70.40 | 64.68 | 55.43 | 47.61 | 62.76 | |||||||||||||
| 1960 | 45.19 | 50.45 | 56.74 | 59.80 | 62.35 | 75.97 | 84.68 | 78.32 | 75.13 | 65.19 | 53.07 | 46.68 | 62.80 | |||||||||||||
| 1961 | 51.94 | 53.39 | 53.26 | 60.43 | 64.03 | 76.87 | 81.35 | 84.84 | 71.33 | 63.00 | 51.00 | 47.48 | 63.24 | |||||||||||||
| 1962 | 46.74 | 51.04 | 51.87 | 63.87 | 60.00 | 72.63 | 79.90 | 77.74 | 76.00 | 61.48 | 54.93 | 48.74 | 62.08 | |||||||||||||
| 1963 | 42.29 | 58.25 | 53.87 | 54.33 | 65.58 | 68.77 | 72.97 | 78.39 | 78.03 | 64.26 | 53.37 | 48.48 | 61.55 | |||||||||||||
| 1964 | 47.42 | 50.72 | 51.29 | 56.00 | 62.29 | 68.47 | 77.32 | 76.55 | 72.27 | 66.16 | 48.13 | 46.45 | 60.26 | |||||||||||||
| 1965 | 45.39 | 52.57 | 58.32 | 60.17 | 62.84 | 69.97 | 81.29 | 79.13 | 74.10 | 66.90 | 55.03 | 45.32 | 62.59 | |||||||||||||
| 1966 | 45.45 | 49.25 | 54.00 | 63.50 | 67.48 | 73.20 | 77.29 | 80.10 | 76.73 | 64.77 | 52.23 | 49.58 | 62.80 | |||||||||||||
| 1967 | 48.39 | 52.43 | 52.00 | 53.83 | 67.16 | 74.57 | 82.81 | 87.77 | 80.87 | 63.16 | 54.33 | 45.84 | 63.60 | |||||||||||||
| 1968 | 47.52 | 56.38 | 57.65 | 58.67 | 64.94 | 72.37 | 80.03 | 75.84 | 72.70 | 62.48 | 53.80 | 45.65 | 62.33 | |||||||||||||
| 1969 | 41.58 | 46.57 | 58.10 | 59.33 | 68.97 | 71.30 | 76.32 | 77.45 | 74.17 | 60.94 | 52.00 | 48.35 | 61.26 | |||||||||||||
| 1970 | 47.19 | 54.79 | 55.23 | 54.67 | 65.68 | 75.17 | 82.48 | 81.52 | 71.03 | 63.71 | 53.53 | 45.35 | 62.53 | |||||||||||||
| 1971 | 45.42 | 49.29 | 49.68 | 57.30 | 65.32 | 67.97 | 79.35 | 82.23 | 71.93 | 59.65 | 50.27 | 44.42 | 60.23 | |||||||||||||
| 1972 | 44.35 | 51.17 | 57.10 | 55.53 | 67.81 | 71.90 | 83.87 | 82.90 | 72.73 | 62.32 | 53.20 | 43.87 | 62.23 | |||||||||||||
| 1973 | 45.23 | 53.86 | 51.55 | 60.50 | 69.26 | 72.87 | 81.90 | 78.55 | 74.27 | 63.35 | 48.40 | 50.00 | 62.48 | |||||||||||||
| 1974 | 44.19 | 47.64 | 53.63 | a | 57.77 | 62.71 | 72.77 | 78.03 | 81.29 | 82.83 | 68.48 | 53.90 | 48.55 | 62.65 | ||||||||||||
| 1975 | 48.39 | 48.61 | 50.26 | 53.13 | 64.87 | 70.33 | 78.71 | 75.00 | 78.47 | 60.84 | 51.07 | 48.55 | 60.69 | |||||||||||||
| 1976 | 47.87 | 50.24 | 52.16 | 55.97 | 66.26 | 68.07 | 78.52 | 74.58 | 74.63 | 66.06 | 54.23 | 45.48 | 61.17 | |||||||||||||
| 1977 | 49.06 | 55.29 | 51.94 | 62.87 | 60.19 | 74.80 | 78.10 | 85.35 | 69.87 | 63.29 | 53.13 | 49.35 | 62.77 | |||||||||||||
| 1978 | 48.26 | 53.18 | 59.81 | 57.47 | 62.84 | 74.33 | 78.19 | 78.26 | 69.97 | 67.74 | 49.70 | 43.39 | 61.93 | |||||||||||||
| 1979 | 39.35 | 48.68 | 58.81 | 58.87 | 67.68 | 74.83 | 82.19 | 78.19 | 77.03 | 67.23 | 51.10 | 50.81 | 62.90 | |||||||||||||
| 1980 | 45.19 | 53.14 | 53.87 | 62.50 | 63.35 | 66.73 | 78.84 | 78.71 | 75.67 | 68.10 | 55.37 | 50.74 | 62.68 | |||||||||||||
| 1981 | 48.06 | 52.93 | 56.00 | 59.30 | 64.39 | 71.17 | 78.13 | 83.97 | 77.43 | 62.52 | 54.77 | 48.58 | 63.10 | |||||||||||||
| 1982 | 43.45 | 50.54 | 54.26 | 57.70 | 67.23 | 72.37 | 76.55 | 79.77 | 72.30 | 63.48 | 51.40 | 46.19 | 61.27 | |||||||||||||
| 1983 | 51.00 | 53.00 | 55.97 | 59.77 | 68.00 | 69.23 | 72.48 | 78.16 | 71.37 | 64.29 | 54.20 | 43.13 | 61.72 | |||||||||||||
| 1984 | 49.06 | 53.24 | 58.06 | 56.73 | 64.29 | 69.27 | 80.35 | 80.35 | 74.77 | 59.61 | 51.43 | 43.58 | 61.73 | |||||||||||||
| 1985 | 42.71 | 48.36 | 52.06 | 63.03 | 66.61 | 74.63 | 85.03 | 79.16 | 68.10 | 63.03 | 43.87 | 42.81 | 60.78 | |||||||||||||
| 1986 | 49.58 | 50.48 | a | 60.10 | 57.13 | 65.06 | 75.63 | 74.26 | 84.84 | 68.67 | 65.03 | 52.87 | 45.52 | 62.43 | ||||||||||||
| 1987 | 46.87 | 52.21 | 55.68 | 66.03 | 68.03 | 76.10 | 74.03 | 80.03 | 75.47 | 71.42 | 52.70 | 43.00 | 63.46 | |||||||||||||
| 1988 | 44.84 | 52.79 | 55.48 | 60.07 | 62.61 | 68.93 | 79.00 | 78.84 | 74.33 | 65.42 | 49.23 | 44.10 | 61.30 | |||||||||||||
| 1989 | 44.65 | 40.93 | 50.06 | 62.80 | 61.00 | 69.93 | 71.48 | 71.39 | 74.90 | 60.90 | 50.33 | 42.90 | 58.44 | |||||||||||||
| 1990 | 45.26 | 48.32 | 58.52 | 63.37 | 64.45 | 70.20 | 82.35 | 79.42 | 76.83 | 62.32 | 52.60 | 39.90 | 61.96 | |||||||||||||
| 1991 | 46.81 | 57.86 | 52.23 | 55.80 | 60.71 | 67.77 | 80.94 | 81.29 | 80.53 | 68.00 | 53.73 | 46.42 | 62.67 | |||||||||||||
| 1992 | 50.45 | 57.52 | 61.35 | 63.87 | 73.68 | 76.53 | 79.16 | 83.97 | 74.90 | 65.45 | 52.90 | 43.55 | 65.28 | |||||||||||||
| 1993 | 42.10 | 47.11 | 57.32 | 57.47 | 68.94 | 69.07 | 71.52 | 76.58 | 78.80 | 68.97 | 48.43 | 47.00 | 61.11 | |||||||||||||
| 1994 | 50.84 | 48.71 | 59.52 | 61.13 | 67.94 | 68.97 | 83.13 | 80.35 | 79.97 | 64.26 | 47.77 | 49.52 | 63.51 | |||||||||||||
| 1995 | 49.00 | 55.39 | 56.58 | 58.43 | 67.52 | 70.53 | 79.29 | 78.71 | 77.23 | 64.23 | 56.27 | 48.29 | 63.46 | |||||||||||||
| 1996 | 48.50 | k | 51.00 | 56.87 | 61.17 | 63.19 | 71.73 | 83.97 | 83.00 | 73.13 | 62.26 | 55.03 | 48.55 | 64.54 | ||||||||||||
| 1997 | 47.74 | 50.82 | 55.52 | 58.93 | 71.77 | 70.33 | 78.81 | 81.68 | 74.70 | 60.39 | 54.73 | 45.03 | 62.54 | |||||||||||||
| 1998 | 50.03 | 52.46 | 55.06 | 59.60 | 59.87 | 70.43 | 81.16 | 82.42 | 78.73 | 62.74 | 53.00 | 45.19 | 62.56 | |||||||||||||
| 1999 | 47.68 | 49.04 | 51.45 | 58.27 | 61.71 | 69.87 | 78.35 | 79.00 | 77.86 | a | 66.90 | a | 56.77 | 46.42 | 61.94 | |||||||||||
| 2000 | 44.94 | 49.72 | 52.81 | 62.17 | 65.55 | 74.50 | 77.32 | 80.52 | 75.70 | 65.00 | 48.60 | 46.81 | 61.97 | |||||||||||||
| 2001 | 47.74 | 49.00 | 56.32 | 56.53 | 70.23 | 69.83 | 78.42 | 81.03 | 77.87 | 63.68 | 53.97 | 46.91 | i | 64.06 | ||||||||||||
| 2002 | 46.42 | 53.61 | 52.32 | 60.10 | 63.97 | 73.27 | d | 82.39 | 82.29 | 77.37 | 62.39 | 55.37 | 49.55 | 63.25 | ||||||||||||
| 2003 | 51.16 | 51.36 | 56.58 | 56.60 | 68.12 | g | 76.37 | 85.19 | 82.77 | 80.17 | f | 67.94 | 50.48 | e | 48.26 | h | 64.27 | |||||||||
| 2004 | 48.92 | e | 51.76 | 60.52 | 63.69 | d | 66.39 | 71.67 | 82.32 | 81.55 | 69.87 | 63.42 | g | 52.21 | f | 48.79 | g | 66.30 | ||||||||
| 2005 | 51.00 | f | 53.75 | 60.68 | f | 60.61 | g | 67.72 | f | 67.83 | 82.10 | 84.78 | h | 76.14 | h | 65.46 | g | 50.59 | h | 46.94 | m | 67.89 | ||||
| 2006 | 50.72 | f | 53.42 | i | 55.93 | q | 63.50 | n | 70.78 | h | 73.63 | k | 83.70 | h | 80.10 | k | 78.15 | q | 63.97 | 62.29 | w | ----- | z | 63.97 | ||
| 2007 | 48.35 | n | 50.68 | 59.35 | 60.20 | 65.96 | d | 72.00 | 80.65 | 78.39 | 72.83 | 59.65 | 50.43 | 45.07 | b | 63.20 | ||||||||||
| 2008 | 42.17 | m | 50.29 | h | ----- | z | ----- | z | 65.45 | b | 69.53 | ----- | z | 80.94 | 78.32 | e | 61.00 | 52.57 | 44.07 | a | 64.55 | |||||
| 2009 | 45.68 | 51.64 | 50.39 | 59.22 | g | 68.39 | 71.80 | 84.06 | 81.39 | 77.38 | a | 60.40 | a | 52.00 | 41.26 | 62.22 | ||||||||||
| 2010 | 50.13 | 52.82 | 55.65 | 57.90 | a | 61.90 | 67.17 | 80.26 | 80.48 | 73.27 | 62.90 | 51.57 | 48.45 | k | 63.09 | |||||||||||
| 2011 | 50.32 | c | 47.56 | a | 53.13 | 55.41 | a | 59.58 | 68.40 | 74.16 | 79.42 | 80.07 | 62.10 | 51.40 | 43.87 | 60.45 | ||||||||||
| 2012 | 48.23 | 50.52 | 51.10 | 60.30 | 64.90 | 68.29 | b | 76.03 | 82.74 | 77.57 | 65.17 | b | 55.67 | 45.87 | 62.20 | |||||||||||
| 2013 | 44.03 | 49.04 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.53 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.41 | 50.90 | 54.37 | 59.29 | 65.57 | 71.41 | 79.47 | 79.94 | 75.36 | 63.82 | 52.45 | 46.41 | 62.06 | |||||||||||||
| S.D. | 3.37 | 3.21 | 3.17 | 3.16 | 3.16 | 2.91 | 3.37 | 3.02 | 3.32 | 2.94 | 2.79 | 2.69 | 1.23 | |||||||||||||
| SKEW | -0.83 | -0.16 | 0.26 | 0.01 | 0.24 | 0.35 | -0.51 | -0.11 | -0.06 | 0.25 | -0.15 | 0.06 | -0.23 | |||||||||||||
| MAX | 52.61 | 58.25 | 61.35 | 66.93 | 73.68 | 79.00 | 85.19 | 87.77 | 82.83 | 71.42 | 60.70 | 53.23 | 65.28 | |||||||||||||
| MIN | 36.00 | 40.93 | 49.16 | 52.17 | 59.58 | 65.57 | 71.48 | 71.39 | 68.10 | 55.74 | 43.87 | 39.90 | 58.44 | |||||||||||||
| NO YRS | 65 | 68 | 66 | 65 | 66 | 68 | 67 | 68 | 67 | 68 | 67 | 64 | 59 | |||||||||||||