| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1957 | ----- | z | ----- | z | 50.50 | e | 57.60 | 65.29 | 78.30 | 82.50 | a | 81.16 | 78.57 | 57.07 | a | 46.70 | 44.00 | a | 64.17 | |||||||
| 1958 | 40.84 | 48.43 | 46.16 | 55.23 | 73.68 | 72.10 | 83.90 | 87.32 | 73.93 | 69.45 | 50.52 | a | 52.10 | 62.81 | ||||||||||||
| 1959 | 45.19 | 43.79 | 52.19 | 62.47 | 61.10 | 77.37 | 88.74 | 82.81 | 69.20 | 66.61 | 55.70 | 43.19 | 62.36 | |||||||||||||
| 1960 | 37.29 | 41.97 | 53.68 | 57.87 | 62.03 | 80.57 | 90.52 | 82.45 | 79.77 | 63.58 | 45.63 | 43.06 | 61.53 | |||||||||||||
| 1961 | 46.58 | 47.18 | 49.74 | 59.60 | 64.03 | 82.67 | 88.26 | 87.19 | 71.13 | 63.32 | 47.30 | 40.61 | 62.30 | |||||||||||||
| 1962 | 36.74 | 39.64 | 46.77 | 63.60 | 61.06 | 76.80 | 84.39 | 81.61 | 79.20 | 62.94 | 51.83 | 46.10 | 60.89 | |||||||||||||
| 1963 | 40.39 | 52.29 | 49.35 | 49.63 | 67.42 | 72.63 | 80.00 | 82.35 | 79.47 | 64.65 | 50.37 | 45.23 | 61.15 | |||||||||||||
| 1964 | 40.90 | 46.03 | 47.55 | 56.67 | 64.13 | 70.57 | 84.19 | 82.19 | 74.60 | 68.48 | 46.93 | 38.77 | 60.09 | |||||||||||||
| 1965 | 40.39 | 48.61 | 52.74 | 57.50 | 64.71 | 74.20 | 82.90 | 78.84 | 71.00 | 71.61 | 51.13 | 40.19 | 61.15 | |||||||||||||
| 1966 | 41.61 | 43.71 | 52.74 | 62.70 | 73.00 | 72.17 | 81.48 | 84.94 | 78.00 | 68.23 | 50.27 | 44.23 | 62.76 | |||||||||||||
| 1967 | 43.13 | 50.46 | 47.06 | 47.73 | 67.39 | 75.57 | 88.03 | 90.48 | 81.57 | 64.68 | 52.53 | 39.23 | 62.32 | |||||||||||||
| 1968 | 41.65 | 51.10 | 55.26 | 57.97 | 67.26 | 77.53 | 89.94 | 77.58 | 76.03 | 63.71 | 47.53 | 39.74 | 62.11 | |||||||||||||
| 1969 | 38.94 | 40.00 | 49.81 | 57.23 | 71.84 | 74.20 | 84.65 | 85.35 | 76.43 | 55.94 | 52.30 | 43.35 | 60.84 | |||||||||||||
| 1970 | 41.58 | 51.36 | 50.74 | 51.73 | 70.13 | 77.30 | 88.26 | 88.23 | 71.80 | 63.48 | 48.17 | 36.71 | 61.62 | |||||||||||||
| 1971 | 43.23 | 46.57 | 43.39 | 56.83 | 64.03 | 71.07 | 86.03 | 89.29 | 70.67 | 57.87 | 49.17 | 36.10 | 59.52 | |||||||||||||
| 1972 | 38.87 | 45.55 | 56.48 | 54.37 | 70.55 | 79.20 | 86.29 | 85.74 | 71.53 | 63.58 | 45.70 | 36.19 | 61.17 | |||||||||||||
| 1973 | 38.97 | 45.75 | 48.26 | 61.20 | 72.10 | 78.23 | 88.19 | 84.87 | 75.50 | 63.55 | 44.90 | 44.03 | 62.13 | |||||||||||||
| 1974 | 36.90 | 44.79 | 48.06 | 55.77 | 64.71 | 79.00 | l | 84.69 | b | 84.52 | 83.27 | 68.48 | 52.40 | 42.10 | 60.52 | |||||||||||
| 1975 | 43.97 | 40.82 | 45.48 | 49.00 | 68.00 | 73.90 | 85.48 | 80.42 | 82.70 | 58.55 | 46.00 | 44.13 | 59.87 | |||||||||||||
| 1976 | 43.87 | 45.10 | 47.00 | 54.47 | 70.65 | 72.37 | 85.35 | 75.26 | 77.70 | 66.77 | 57.77 | 45.32 | 61.80 | |||||||||||||
| 1977 | 37.74 | 52.32 | 47.52 | 64.03 | 57.48 | 80.67 | 84.42 | 85.55 | 72.47 | 63.65 | 48.67 | 43.35 | 61.49 | |||||||||||||
| 1978 | 44.16 | 47.50 | 57.03 | 53.60 | 63.10 | 75.17 | 84.32 | 81.06 | 71.03 | 71.10 | 46.70 | 37.65 | 61.03 | |||||||||||||
| 1979 | 34.45 | 42.36 | 54.19 | 57.03 | 70.23 | 78.57 | 87.06 | 80.77 | 80.53 | 66.19 | 45.07 | 46.45 | 61.91 | |||||||||||||
| 1980 | 40.42 | 48.55 | 48.29 | 60.30 | 65.87 | 70.17 | 85.90 | 82.29 | 76.87 | 65.90 | 50.57 | 44.58 | 61.64 | |||||||||||||
| 1981 | 41.65 | 44.75 | 52.74 | 60.63 | 65.32 | 75.83 | 84.97 | 89.23 | 78.23 | 59.23 | 50.37 | 44.45 | b | 62.28 | ||||||||||||
| 1982 | 38.42 | 44.18 | 47.10 | 52.93 | 67.42 | 74.43 | 82.10 | 84.23 | 71.13 | 61.29 | 43.30 | 38.71 | 58.77 | |||||||||||||
| 1983 | 45.13 | 46.68 | 48.52 | 53.40 | 68.48 | 73.30 | 79.65 | 83.13 | 74.80 | 66.68 | 46.57 | 37.23 | 60.30 | |||||||||||||
| 1984 | 41.81 | 46.24 | 53.16 | 54.47 | 67.61 | 72.03 | 88.26 | 86.65 | 74.63 | 55.97 | 45.33 | 37.29 | 60.29 | |||||||||||||
| 1985 | 34.19 | 43.79 | 49.13 | 64.90 | 68.29 | 80.27 | ----- | z | 83.39 | 66.90 | 61.32 | 40.87 | 41.77 | 57.71 | ||||||||||||
| 1986 | 49.03 | 48.18 | 57.74 | 59.67 | 68.48 | 81.80 | 82.10 | 89.58 | 66.83 | 66.39 | 50.93 | 41.13 | 63.49 | |||||||||||||
| 1987 | 40.65 | 47.11 | 52.45 | 68.10 | 72.06 | 80.50 | 77.52 | 86.52 | 82.23 | 72.45 | 48.63 | 38.87 | 63.92 | |||||||||||||
| 1988 | 38.42 | 52.69 | 54.97 | 62.13 | 68.42 | 78.03 | 89.26 | 88.03 | 79.93 | 75.45 | 46.90 | 41.71 | 64.66 | |||||||||||||
| 1989 | 40.58 | 37.89 | 50.83 | a | 64.67 | 68.13 | 80.97 | 88.65 | 82.35 | 77.03 | 63.13 | 53.60 | 46.06 | 62.82 | ||||||||||||
| 1990 | 44.87 | 45.36 | 55.23 | 66.97 | 66.61 | 78.70 | 90.52 | 85.97 | 84.50 | 66.23 | 53.43 | 36.87 | 64.60 | |||||||||||||
| 1991 | 45.23 | 56.54 | 47.74 | 55.97 | 63.19 | 73.93 | 89.32 | 86.68 | 83.27 | 68.81 | 49.77 | 43.81 | 63.69 | |||||||||||||
| 1992 | 43.65 | 52.52 | 58.29 | 65.00 | 79.61 | 81.53 | 85.26 | 89.23 | 79.00 | 68.61 | 49.13 | 37.81 | 65.80 | |||||||||||||
| 1993 | 34.58 | 36.46 | 54.03 | 56.47 | 70.71 | 73.60 | 78.03 | 82.87 | 80.17 | 65.00 | 48.00 | 42.42 | 60.20 | |||||||||||||
| 1994 | 47.87 | 44.21 | 58.19 | 62.27 | 71.23 | 79.87 | 92.74 | 89.06 | 81.10 | 64.00 | 41.67 | 41.84 | 64.50 | |||||||||||||
| 1995 | 43.03 | 55.36 | 48.68 | 57.47 | 67.06 | 73.87 | 85.35 | 85.90 | 82.33 | 66.35 | 56.20 | 41.87 | 63.62 | |||||||||||||
| 1996 | 43.55 | 46.66 | 54.97 | 60.67 | 65.48 | 79.57 | 91.81 | 89.65 | 76.20 | 63.52 | 52.20 | 43.45 | 63.98 | |||||||||||||
| 1997 | 44.39 | 43.50 | 55.94 | 58.67 | 74.87 | 76.00 | 86.77 | 86.97 | 78.83 | 62.87 | 51.30 | 41.84 | 63.50 | |||||||||||||
| 1998 | 45.23 | 43.89 | 52.29 | 58.10 | 60.19 | 74.70 | 89.97 | 90.68 | 81.97 | 62.84 | 47.43 | 40.23 | 62.29 | |||||||||||||
| 1999 | 44.58 | 41.93 | 48.71 | 57.50 | 68.00 | 77.80 | 87.90 | 85.42 | 81.07 | 71.63 | a | 56.20 | 44.48 | 63.77 | ||||||||||||
| 2000 | 42.23 | 47.62 | 52.19 | 64.40 | 67.71 | 82.47 | 85.71 | 89.03 | 76.00 | 63.06 | 43.93 | 44.10 | 63.20 | |||||||||||||
| 2001 | 43.13 | 45.29 | 56.03 | 55.83 | 76.52 | 78.27 | 86.61 | ----- | z | 82.47 | 69.94 | 52.13 | 41.45 | 62.51 | ||||||||||||
| 2002 | 43.13 | 51.18 | 53.35 | 63.50 | 70.68 | 82.83 | 91.87 | 85.19 | 80.57 | 65.10 | 54.43 | 45.48 | 65.61 | |||||||||||||
| 2003 | 48.23 | 46.64 | 54.84 | 53.97 | 69.03 | 84.10 | 93.87 | 89.06 | 84.67 | 71.68 | 47.00 | 44.35 | 65.62 | |||||||||||||
| 2004 | 43.13 | 46.14 | 62.55 | 65.17 | 68.61 | 80.93 | 91.00 | 87.13 | 77.13 | 63.19 | 50.07 | 45.61 | 65.06 | |||||||||||||
| 2005 | 42.68 | 49.93 | 56.74 | 58.47 | 66.32 | 73.03 | 91.48 | 90.32 | 78.47 | 67.29 | 47.57 | 38.58 | 63.41 | |||||||||||||
| 2006 | 44.97 | 46.07 | 46.42 | 59.20 | 72.68 | 83.00 | 92.87 | 86.10 | 80.50 | 65.39 | 50.07 | 42.97 | 64.19 | |||||||||||||
| 2007 | 42.58 | 46.21 | 60.06 | 62.97 | 74.55 | 80.83 | 93.06 | 88.58 | 76.40 | 61.19 | 53.20 | 39.77 | 64.95 | |||||||||||||
| 2008 | 38.84 | 49.69 | 50.81 | 57.50 | 69.74 | 78.87 | 89.90 | 89.06 | 82.87 | 67.32 | 54.70 | 40.90 | 64.18 | |||||||||||||
| 2009 | 45.61 | 47.64 | 50.26 | 60.70 | 73.32 | 76.23 | 91.26 | 87.42 | 84.20 | 61.74 | 52.03 | 40.19 | 64.22 | |||||||||||||
| 2010 | 46.84 | 48.46 | 54.13 | 57.23 | 62.71 | 76.37 | 90.29 | 87.65 | 81.77 | 66.77 | 48.77 | 43.00 | 63.67 | |||||||||||||
| 2011 | 44.77 | 43.46 | 48.35 | 54.90 | 63.19 | 76.43 | 87.45 | 90.06 | 85.60 | 66.52 | 48.87 | 44.16 | 62.82 | |||||||||||||
| 2012 | 46.35 | 47.24 | 51.61 | 62.37 | 72.10 | 77.20 | 90.10 | 91.68 | 86.17 | 67.83 | a | 52.67 | 40.94 | 65.52 | ||||||||||||
| 2013 | 38.71 | 46.96 | 57.06 | 59.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.00 | z | 47.58 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.07 | 46.51 | 51.84 | 58.58 | 68.00 | 77.07 | 86.93 | 85.62 | 77.86 | 65.15 | 49.48 | 41.96 | 62.64 | |||||||||||||
| S.D. | 3.46 | 3.99 | 4.11 | 4.51 | 4.32 | 3.60 | 3.86 | 3.60 | 4.79 | 4.11 | 3.67 | 3.15 | 1.74 | |||||||||||||
| SKEW | -0.34 | 0.05 | 0.29 | -0.12 | 0.09 | -0.02 | -0.39 | -0.62 | -0.45 | -0.08 | -0.01 | 0.21 | -0.09 | |||||||||||||
| MAX | 49.03 | 56.54 | 62.55 | 68.10 | 79.61 | 84.10 | 93.87 | 91.68 | 86.17 | 75.45 | 57.77 | 52.10 | 65.80 | |||||||||||||
| MIN | 34.19 | 36.46 | 43.39 | 47.73 | 57.48 | 70.17 | 77.52 | 75.26 | 66.83 | 55.94 | 40.87 | 36.10 | 58.77 | |||||||||||||
| NO YRS | 56 | 56 | 57 | 56 | 56 | 55 | 55 | 55 | 56 | 56 | 56 | 56 | 52 | |||||||||||||