| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.20 | u | 85.52 | 77.50 | 61.03 | 53.30 | 44.00 | 64.27 | ||||||
| 1968 | 44.90 | 56.50 | a | 56.39 | 56.87 | 63.97 | 69.10 | 77.48 | 72.26 | 71.03 | 60.42 | 51.53 | 41.23 | 60.14 | ||||||||||||
| 1969 | 36.65 | 45.46 | 56.39 | 56.53 | 68.16 | 73.00 | 73.35 | 72.81 | 70.33 | 60.06 | 54.10 | 46.29 | 59.43 | |||||||||||||
| 1970 | 44.16 | 54.82 | 54.84 | 53.63 | 64.45 | 73.83 | 76.55 | 77.68 | 67.83 | 61.42 | 51.60 | 42.61 | 60.29 | |||||||||||||
| 1971 | 41.94 | 48.11 | 47.94 | 56.43 | 64.35 | 63.40 | 77.20 | a | 79.61 | 68.47 | 59.48 | 49.50 | 41.63 | a | 58.17 | |||||||||||
| 1972 | 42.42 | 48.48 | 53.77 | 53.60 | 68.00 | 69.70 | 79.26 | 79.58 | 68.60 | 62.55 | 51.43 | 39.74 | 59.76 | |||||||||||||
| 1973 | 42.42 | 51.63 | a | 51.71 | 59.40 | 64.96 | c | 68.50 | 76.35 | 72.97 | 72.57 | 59.71 | 46.47 | 47.47 | a | 59.51 | ||||||||||
| 1974 | 41.58 | 46.18 | 51.26 | 55.27 | 59.10 | 71.13 | 73.26 | 77.39 | 79.97 | 67.26 | 52.43 | 46.45 | 60.11 | |||||||||||||
| 1975 | 44.19 | 44.46 | 50.19 | 53.80 | 64.03 | 67.23 | 75.39 | 70.55 | 76.83 | 57.65 | 48.73 | 45.90 | 58.25 | |||||||||||||
| 1976 | 46.58 | 48.10 | 49.84 | 55.13 | 65.10 | 66.23 | 73.32 | 70.81 | 72.73 | 64.90 | 56.17 | 46.52 | 59.62 | |||||||||||||
| 1977 | 46.19 | 54.25 | 49.77 | 63.00 | 59.77 | 71.67 | 74.06 | 81.03 | 67.67 | 62.23 | 48.07 | 46.55 | 60.36 | |||||||||||||
| 1978 | 44.68 | 50.00 | 57.16 | 57.47 | 61.42 | 73.55 | a | 76.23 | 75.16 | 67.07 | 66.26 | 46.70 | 40.06 | 59.65 | ||||||||||||
| 1979 | 37.90 | 44.89 | 57.03 | 56.97 | 65.71 | 71.43 | 76.32 | 74.16 | 72.87 | 64.03 | 51.63 | 48.42 | 60.11 | |||||||||||||
| 1980 | 41.81 | 49.24 | 51.52 | 61.53 | 63.58 | 64.47 | 75.77 | 74.32 | 72.17 | 67.06 | 52.10 | 47.48 | 60.09 | |||||||||||||
| 1981 | 50.26 | 52.71 | 57.90 | 57.97 | 62.19 | 68.00 | 73.52 | 81.65 | 73.50 | 62.58 | 55.70 | 45.39 | 61.78 | |||||||||||||
| 1982 | 41.39 | 47.54 | 53.19 | 56.03 | 65.03 | 73.63 | 73.52 | 75.84 | 71.70 | 62.55 | 50.03 | 45.90 | 59.70 | |||||||||||||
| 1983 | 48.06 | 51.54 | 55.45 | 61.17 | 68.68 | 66.50 | 70.87 | 75.68 | 69.33 | 63.48 | 51.43 | 39.13 | 60.11 | |||||||||||||
| 1984 | 47.94 | 52.00 | 58.35 | 55.93 | 61.00 | 67.27 | 76.77 | 77.00 | 70.80 | 57.13 | 49.40 | 41.32 | 59.58 | |||||||||||||
| 1985 | 45.45 | 46.32 | 53.03 | 61.03 | 64.87 | 71.17 | 84.23 | 77.29 | 68.20 | 60.71 | 43.27 | 45.13 | 60.06 | |||||||||||||
| 1986 | 49.06 | 49.89 | 59.71 | 57.87 | 64.19 | 74.17 | 70.58 | 83.06 | 68.67 | 67.71 | 52.40 | 46.48 | 61.98 | |||||||||||||
| 1987 | 46.55 | 50.96 | 53.55 | 61.43 | 66.65 | 72.97 | 72.68 | 78.00 | 75.97 | 69.90 | 52.80 | 40.61 | 61.84 | |||||||||||||
| 1988 | 43.00 | 51.83 | 52.90 | ----- | z | 61.10 | 67.17 | 75.45 | 74.97 | 72.93 | 64.55 | 48.60 | 44.29 | 59.71 | ||||||||||||
| 1989 | 43.84 | 40.64 | 48.90 | 62.70 | 63.45 | 71.33 | 69.77 | 74.55 | 77.47 | 61.10 | 51.77 | 46.68 | 59.35 | |||||||||||||
| 1990 | 45.42 | 43.89 | 56.71 | 60.90 | 62.35 | 68.70 | 80.42 | 78.19 | 77.33 | 57.16 | 50.07 | 38.42 | 59.96 | |||||||||||||
| 1991 | 45.29 | 56.46 | 49.97 | 56.70 | 59.06 | 65.67 | 79.19 | 77.29 | 76.47 | 64.52 | 50.43 | 44.42 | 60.46 | |||||||||||||
| 1992 | 45.90 | 56.07 | 61.90 | 61.27 | 71.39 | 74.10 | 76.42 | 80.06 | 70.23 | 62.65 | 49.63 | 41.16 | 62.57 | |||||||||||||
| 1993 | 39.84 | 47.14 | 54.74 | 56.00 | 67.58 | 66.73 | 66.39 | 74.52 | 76.10 | 65.68 | 47.23 | 44.68 | 58.89 | |||||||||||||
| 1994 | 48.06 | 45.11 | 57.52 | 59.33 | 65.61 | 66.97 | 78.00 | 75.65 | 75.57 | 60.00 | 44.00 | 43.48 | 59.94 | |||||||||||||
| 1995 | 47.32 | 52.68 | 54.26 | 57.13 | 67.06 | 69.07 | 75.68 | 72.74 | 74.60 | 59.87 | 54.17 | 44.97 | 60.80 | |||||||||||||
| 1996 | 43.81 | 47.55 | 54.10 | 58.13 | 58.42 | 68.40 | 79.74 | 77.77 | 67.80 | 58.71 | 49.97 | 43.35 | 58.98 | |||||||||||||
| 1997 | 43.84 | 49.00 | 51.23 | 56.90 | 68.61 | 67.23 | 74.45 | 78.90 | 72.60 | 57.77 | 54.27 | 43.94 | 59.90 | |||||||||||||
| 1998 | 44.97 | 49.96 | 53.74 | 58.10 | 59.97 | 68.97 | 77.81 | 78.00 | 76.37 | 60.71 | 49.60 | 42.06 | 60.02 | |||||||||||||
| 1999 | 44.39 | 45.43 | 49.74 | 56.97 | 60.39 | 65.03 | 73.32 | 74.58 | 74.20 | 63.03 | 53.30 | 46.90 | 58.94 | |||||||||||||
| 2000 | 42.61 | 48.03 | 50.65 | 61.07 | 62.58 | 73.60 | 73.68 | 74.77 | 70.43 | 59.35 | 47.67 | 45.13 | 59.13 | |||||||||||||
| 2001 | 46.23 | 48.36 | 54.32 | 54.77 | 67.52 | 66.43 | 71.97 | 76.90 | 72.57 | 58.71 | 51.67 | 43.68 | 59.43 | |||||||||||||
| 2002 | 42.81 | 49.79 | 49.32 | 58.63 | 61.35 | 71.03 | 78.06 | 77.13 | 73.13 | 61.55 | 52.97 | 46.26 | 60.17 | |||||||||||||
| 2003 | 49.81 | 50.07 | 52.71 | 55.37 | 64.03 | 73.17 | 79.97 | 79.00 | 75.93 | 62.84 | 48.33 | 44.06 | 61.27 | |||||||||||||
| 2004 | 41.97 | 49.93 | 56.71 | 64.57 | 63.87 | 72.40 | 79.29 | 78.39 | 67.40 | 61.39 | 50.00 | 46.16 | 61.01 | |||||||||||||
| 2005 | 46.68 | 52.79 | 57.13 | 57.47 | 65.48 | 65.50 | 75.77 | 79.52 | 69.37 | 59.23 | 49.13 | 43.87 | 60.16 | |||||||||||||
| 2006 | 47.16 | 46.79 | 49.74 | 58.93 | 66.29 | 69.83 | 77.52 | 75.03 | 75.43 | 61.77 | 48.97 | 45.55 | b | 60.25 | ||||||||||||
| 2007 | 43.68 | 48.43 | 55.45 | 57.63 | 66.48 | 68.73 | 77.32 | 74.97 | 69.73 | 59.03 | 52.33 | 42.32 | 59.68 | |||||||||||||
| 2008 | 40.81 | 49.83 | 49.71 | 52.90 | 64.10 | 67.37 | 76.29 | 75.19 | 74.13 | 60.48 | 53.27 | 40.04 | f | 60.37 | ||||||||||||
| 2009 | 43.94 | 48.39 | 48.94 | 58.13 | 66.58 | 71.20 | 82.06 | ----- | z | 74.07 | 58.45 | 49.93 | 41.97 | 58.51 | ||||||||||||
| 2010 | 48.94 | 52.14 | 53.61 | 55.60 | 55.77 | 64.76 | a | 74.19 | 75.61 | 68.57 | 61.94 | 47.50 | 45.10 | 58.64 | ||||||||||||
| 2011 | 44.84 | 44.00 | 49.55 | 52.53 | 59.35 | 65.87 | 72.87 | 75.90 | 76.17 | 59.10 | 48.17 | 45.26 | 57.80 | |||||||||||||
| 2012 | 45.10 | 49.90 | 50.19 | 59.03 | 64.94 | 65.47 | 73.94 | 79.26 | 75.40 | 60.84 | 50.73 | 43.10 | 59.82 | |||||||||||||
| 2013 | 42.32 | 47.61 | 50.71 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.96 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 44.49 | 49.24 | 53.39 | 57.77 | 63.97 | 69.15 | 75.70 | 76.69 | 72.56 | 61.71 | 50.49 | 44.11 | 59.94 | |||||||||||||
| S.D. | 2.91 | 3.48 | 3.35 | 2.82 | 3.23 | 3.07 | 3.33 | 3.06 | 3.40 | 2.96 | 2.75 | 2.43 | 0.99 | |||||||||||||
| SKEW | -0.30 | 0.11 | 0.36 | 0.32 | -0.26 | 0.12 | -0.10 | 0.43 | 0.06 | 0.73 | -0.33 | -0.50 | 0.47 | |||||||||||||
| MAX | 50.26 | 56.50 | 61.90 | 64.57 | 71.39 | 74.17 | 84.23 | 85.52 | 79.97 | 69.90 | 56.17 | 48.42 | 62.57 | |||||||||||||
| MIN | 36.65 | 40.64 | 47.94 | 52.53 | 55.77 | 63.40 | 66.39 | 70.55 | 67.07 | 57.13 | 43.27 | 38.42 | 57.80 | |||||||||||||
| NO YRS | 46 | 46 | 45 | 44 | 45 | 45 | 45 | 45 | 46 | 46 | 46 | 45 | 42 | |||||||||||||