| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1961 | ----- | z | ----- | z | ----- | z | 64.77 | 71.42 | 86.53 | 91.52 | 87.81 | 74.00 | 61.35 | 46.93 | 37.48 | 69.09 | ||||||||||
| 1962 | 40.39 | 47.14 | 50.61 | 66.67 | 70.74 | 81.80 | 87.48 | 85.90 | 77.33 | 65.74 | 51.13 | 38.71 | 63.64 | |||||||||||||
| 1963 | 34.06 | 53.36 | 52.87 | 59.30 | 75.45 | 77.70 | 88.29 | 85.74 | 75.80 | 68.06 | 50.23 | 36.39 | 63.11 | |||||||||||||
| 1964 | 36.97 | 44.07 | 51.42 | 61.90 | 70.77 | 80.03 | 88.45 | 87.13 | a | 76.07 | 67.55 | 46.60 | 42.29 | 62.77 | ||||||||||||
| 1965 | 42.16 | 46.25 | 53.42 | 61.07 | 70.39 | 76.63 | 84.90 | 84.32 | 70.47 | 60.90 | 47.87 | 36.77 | a | 61.26 | ||||||||||||
| 1966 | 35.26 | 40.74 | a | 50.03 | 63.07 | 74.52 | 81.37 | 86.55 | 86.97 | 75.57 | b | 60.11 | c | 50.70 | 40.90 | a | 62.15 | |||||||||
| 1967 | 39.32 | 46.64 | 58.17 | a | 53.50 | b | 70.77 | 76.53 | 89.10 | 89.03 | 77.70 | 61.35 | 51.17 | 37.55 | 62.57 | |||||||||||
| 1968 | 36.74 | 50.48 | 54.29 | 61.20 | 71.65 | 83.53 | 88.71 | 83.94 | 76.83 | 63.68 | 52.43 | 35.39 | 63.24 | |||||||||||||
| 1969 | 43.19 | 44.68 | 51.94 | 63.63 | 74.97 | 79.17 | 88.77 | 89.55 | 79.07 | 59.55 | 50.07 | 40.33 | a | 63.74 | ||||||||||||
| 1970 | 40.10 | 48.43 | 54.71 | 58.37 | 73.45 | 81.87 | 90.16 | 90.19 | 73.60 | 60.39 | 49.73 | 41.16 | 63.51 | |||||||||||||
| 1971 | 40.06 | 46.39 | 51.81 | 61.37 | 68.81 | 80.77 | 90.94 | 93.35 | 76.93 | 58.52 | 47.43 | 40.77 | 63.10 | |||||||||||||
| 1972 | 36.97 | 43.10 | 59.55 | 62.13 | 72.68 | 82.20 | 89.10 | 84.94 | 74.53 | 62.97 | 47.40 | 36.19 | 62.65 | |||||||||||||
| 1973 | 37.77 | 48.96 | a | 51.77 | 61.40 | 75.61 | 83.83 | 88.55 | 86.81 | 74.33 | 61.77 | 47.43 | 39.87 | 63.18 | ||||||||||||
| 1974 | 40.97 | 45.43 | 57.39 | 62.23 | 73.58 | 83.93 | 88.29 | 83.26 | 80.60 | 64.84 | 48.87 | 40.45 | 64.15 | |||||||||||||
| 1975 | 38.00 | 47.54 | 53.81 | 58.47 | 70.77 | 82.40 | 87.52 | 84.03 | 77.70 | 62.19 | 47.20 | 42.10 | 62.64 | |||||||||||||
| 1976 | 39.87 | 48.66 | 52.84 | 61.07 | 74.58 | 80.90 | 87.97 | 81.10 | 75.37 | 62.71 | 49.73 | 34.06 | 62.40 | |||||||||||||
| 1977 | 39.42 | 47.32 | 50.77 | 66.47 | 66.58 | 86.80 | 88.87 | 86.39 | 75.27 | 63.71 | 48.30 | 44.10 | 63.67 | |||||||||||||
| 1978 | 45.13 | 48.71 | 57.87 | 59.88 | d | 67.97 | 82.90 | 87.10 | 86.39 | 74.23 | 65.71 | 50.70 | 36.45 | 63.59 | ||||||||||||
| 1979 | 41.45 | 43.86 | 54.97 | a | 61.19 | c | 72.48 | 76.77 | 84.45 | 81.45 | 78.43 | 63.81 | 46.23 | 38.68 | 61.98 | |||||||||||
| 1980 | 45.71 | 48.57 | a | 52.23 | 61.07 | 67.00 | 76.90 | 87.16 | 85.23 | 73.47 | 61.29 | 47.37 | 41.71 | 62.31 | ||||||||||||
| 1981 | 43.35 | 47.04 | 55.23 | 65.27 | 72.03 | 86.00 | 88.65 | 85.58 | 78.50 | 60.71 | 51.20 | 40.74 | 64.52 | |||||||||||||
| 1982 | 37.55 | 45.39 | 52.06 | 62.53 | 72.77 | 78.57 | 83.23 | 84.71 | 73.00 | 57.32 | 44.40 | 38.63 | a | 60.85 | ||||||||||||
| 1983 | 37.32 | 46.54 | 53.42 | 57.20 | 68.97 | 79.63 | 83.39 | 82.45 | 78.53 | 63.87 | 51.13 | 39.94 | 61.87 | |||||||||||||
| 1984 | 41.35 | 43.97 | 53.10 | 59.20 | 75.32 | 79.07 | 85.00 | 82.87 | 76.80 | 56.61 | 45.07 | b | 38.71 | 61.42 | ||||||||||||
| 1985 | 37.45 | 43.07 | 51.10 | 63.24 | a | 72.19 | 83.40 | 88.42 | 82.71 | 70.40 | 58.94 | 45.43 | 37.97 | 61.19 | ||||||||||||
| 1986 | 40.71 | 47.30 | e | 57.52 | 62.62 | a | 73.48 | b | 82.61 | b | 83.52 | 88.42 | 71.33 | 57.88 | f | 49.72 | a | 38.16 | 63.22 | |||||||
| 1987 | 40.06 | 49.78 | a | 53.19 | 63.40 | 71.65 | 79.77 | 81.48 | 83.97 | 75.93 | 64.19 | 49.90 | 36.74 | 62.51 | ||||||||||||
| 1988 | 36.45 | 44.76 | 54.42 | 60.17 | 68.30 | a | 78.33 | 88.23 | 83.94 | 73.33 | 64.77 | 48.57 | 38.61 | 61.66 | ||||||||||||
| 1989 | 35.68 | 43.43 | 56.26 | 68.10 | 70.32 | 81.31 | a | 87.35 | 82.48 | 71.63 | 58.74 | 45.57 | 34.13 | 61.25 | ||||||||||||
| 1990 | 36.39 | 42.32 | 54.06 | 63.97 | 70.13 | 79.90 | 87.52 | 83.58 | 77.33 | 58.10 | 45.03 | 30.10 | 60.70 | |||||||||||||
| 1991 | 35.55 | 45.86 | 50.10 | 58.80 | 65.61 | 76.10 | 84.40 | a | 83.74 | 77.20 | 64.65 | 47.27 | 37.90 | 60.60 | ||||||||||||
| 1992 | 36.65 | 48.66 | 55.35 | 64.83 | 76.58 | 78.33 | 82.13 | 84.55 | 74.07 | 63.81 | 45.37 | 35.97 | 62.19 | |||||||||||||
| 1993 | 37.35 | 44.79 | 53.84 | 62.60 | 73.39 | 74.87 | 84.81 | 83.29 | 71.90 | 61.77 | 43.93 | 35.65 | 60.68 | |||||||||||||
| 1994 | 36.87 | 41.54 | 57.58 | 62.40 | 70.74 | 82.21 | a | 89.84 | 87.13 | 74.00 | 59.19 | 41.30 | 36.03 | 61.57 | ||||||||||||
| 1995 | 42.39 | 48.50 | 54.06 | 58.70 | 65.87 | 74.27 | 85.35 | 87.00 | 77.13 | 59.94 | 49.43 | 39.42 | 61.84 | |||||||||||||
| 1996 | 38.65 | 48.00 | 53.26 | 63.17 | 71.65 | 81.07 | 88.19 | 82.32 | 71.50 | 56.52 | 45.00 | 35.74 | 61.25 | |||||||||||||
| 1997 | 39.32 | 43.25 | 50.42 | 59.33 | 73.84 | 77.30 | 80.84 | 82.65 | 73.47 | 55.74 | 44.33 | 34.68 | 59.60 | |||||||||||||
| 1998 | 35.77 | 40.89 | 48.74 | 53.43 | 61.42 | 71.70 | 84.10 | 81.87 | 72.27 | 55.45 | 45.63 | 38.42 | 57.48 | |||||||||||||
| 1999 | 40.32 | 44.86 | 54.23 | 56.38 | a | 71.29 | 79.73 | 85.77 | 84.90 | 75.07 | 59.97 | 46.03 | 38.55 | 61.43 | ||||||||||||
| 2000 | 39.90 | 48.41 | 54.97 | a | 63.83 | 72.23 | 82.77 | 85.65 | 83.77 | 71.37 | 59.57 | a | 41.47 | 35.87 | 61.65 | |||||||||||
| 2001 | 35.90 | 41.29 | 55.07 | b | 60.20 | e | 77.20 | a | 84.40 | 86.00 | 88.55 | 76.67 | 63.58 | 51.10 | 38.77 | a | 63.23 | |||||||||
| 2002 | 37.29 | 41.54 | 49.87 | 63.20 | 71.19 | 84.73 | 91.94 | 81.87 | 75.20 | 58.55 | 48.47 | 39.42 | 61.94 | |||||||||||||
| 2003 | 42.61 | 45.75 | 54.43 | a | 60.10 | 71.81 | 83.47 | 90.30 | a | 88.45 | 79.07 | 65.90 | 46.60 | 36.81 | 63.77 | |||||||||||
| 2004 | 37.42 | 44.45 | 59.52 | 64.80 | 73.03 | 82.00 | 87.77 | 85.50 | a | 74.93 | 62.39 | 49.80 | 42.45 | 63.67 | ||||||||||||
| 2005 | 46.26 | 50.79 | 55.55 | 60.83 | 75.19 | 81.33 | 93.29 | 87.55 | 73.93 | 64.35 | 51.20 | 38.90 | 64.93 | |||||||||||||
| 2006 | 41.97 | 46.46 | 51.53 | a | 62.33 | 76.68 | 85.53 | 93.53 | a | 85.23 | 75.53 | 62.03 | 49.47 | 37.71 | 64.00 | |||||||||||
| 2007 | 38.29 | 47.82 | 58.20 | a | 65.03 | 76.42 | 84.21 | a | 92.26 | 90.10 | 78.17 | 62.55 | 51.73 | 38.45 | 65.27 | |||||||||||
| 2008 | 41.52 | 45.55 | 54.32 | 63.27 | 72.84 | 82.93 | 91.90 | 90.52 | 78.03 | 61.87 | 54.20 | 39.61 | 64.71 | |||||||||||||
| 2009 | 40.90 | 43.71 | 52.03 | 60.47 | 77.32 | 76.67 | 89.06 | 82.00 | 78.37 | 58.06 | 44.67 | 35.48 | 61.56 | |||||||||||||
| 2010 | 38.19 | 48.25 | 53.65 | 59.53 | 69.32 | 84.70 | 92.19 | 86.29 | 73.93 | 65.74 | 48.53 | 42.55 | 63.57 | |||||||||||||
| 2011 | 38.00 | 43.89 | 54.32 | 62.83 | 69.13 | 81.73 | 87.42 | 86.77 | 79.10 | 63.81 | 46.37 | 38.32 | 62.64 | |||||||||||||
| 2012 | 38.00 | 48.59 | 52.81 | 63.83 | 75.52 | 84.17 | 89.13 | 90.39 | 81.17 | 65.00 | 50.70 | 44.06 | 65.28 | |||||||||||||
| 2013 | 39.42 | 46.46 | 59.16 | 67.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.00 | z | 48.35 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.20 | 46.02 | 53.92 | 61.62 | 71.88 | 80.87 | 87.63 | 85.55 | 75.50 | 61.76 | 48.00 | 38.38 | 62.49 | |||||||||||||
| S.D. | 2.77 | 2.75 | 2.63 | 2.93 | 3.26 | 3.34 | 2.97 | 2.77 | 2.63 | 3.05 | 2.78 | 2.70 | 1.49 | |||||||||||||
| SKEW | 0.59 | 0.06 | 0.38 | -0.56 | -0.66 | -0.48 | -0.19 | 0.57 | -0.03 | -0.15 | -0.25 | -0.20 | -0.52 | |||||||||||||
| MAX | 46.26 | 53.36 | 59.55 | 68.10 | 77.32 | 86.80 | 93.53 | 93.35 | 81.17 | 68.06 | 54.20 | 44.10 | 65.28 | |||||||||||||
| MIN | 34.06 | 40.74 | 48.74 | 53.43 | 61.42 | 71.70 | 80.84 | 81.10 | 70.40 | 55.45 | 41.30 | 30.10 | 57.48 | |||||||||||||
| NO YRS | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 52 | 52 | 50 | |||||||||||||