| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1963 | ----- | z | ----- | z | ----- | z | 57.50 | 73.32 | 77.80 | 83.74 | 87.35 | 86.17 | 68.74 | 54.34 | a | 49.39 | 70.93 | |||||||||
| 1964 | 46.84 | 56.10 | 56.58 | 65.67 | 70.67 | d | 78.90 | a | 89.03 | 87.77 | 81.77 | 74.81 | 51.40 | 47.29 | 67.24 | |||||||||||
| 1965 | 45.90 | 55.71 | ----- | z | 64.61 | b | 72.68 | 81.07 | 91.84 | 87.42 | e | ----- | z | ----- | z | ----- | z | 44.66 | b | 67.99 | ||||||
| 1966 | 48.03 | 52.07 | 59.52 | 70.57 | 76.26 | 79.67 | 86.00 | 87.48 | 80.63 | 70.83 | b | 55.20 | 48.10 | 67.86 | ||||||||||||
| 1967 | 48.39 | 55.75 | 55.48 | 54.60 | 75.50 | a | 83.87 | 91.26 | 94.81 | 87.53 | 68.10 | 56.03 | 43.32 | 67.89 | ||||||||||||
| 1968 | 47.81 | 59.86 | 63.13 | 66.37 | 72.80 | a | 82.57 | 90.26 | 83.03 | 83.13 | 68.42 | 52.53 | 45.68 | 67.97 | ||||||||||||
| 1969 | 43.23 | 49.29 | 61.06 | 64.50 | 79.13 | 79.43 | 86.79 | c | 86.84 | 82.07 | 64.77 | 56.90 | 48.29 | 66.86 | ||||||||||||
| 1970 | 50.55 | 58.04 | a | 60.00 | a | 58.07 | 75.06 | 83.57 | 91.45 | 89.45 | 80.47 | 70.39 | 54.73 | 45.58 | 68.11 | |||||||||||
| 1971 | 46.00 | 51.71 | 53.57 | a | 61.70 | 70.00 | 76.20 | 88.43 | c | 89.45 | 77.60 | 65.26 | 53.93 | 43.23 | 64.76 | |||||||||||
| 1972 | 47.19 | 55.07 | 64.35 | 63.97 | 76.68 | 84.37 | 93.65 | 91.00 | 80.17 | 69.29 | 54.17 | 44.13 | 68.67 | |||||||||||||
| 1973 | 47.55 | 57.93 | 55.94 | 68.20 | 79.94 | 84.83 | 94.19 | 90.58 | 83.53 | 67.94 | 51.00 | 51.45 | 69.42 | |||||||||||||
| 1974 | 46.52 | 51.96 | 57.74 | 64.63 | 73.35 | 85.63 | 88.42 | 91.16 | 91.77 | 74.58 | 56.67 | 46.53 | a | 69.08 | ||||||||||||
| 1975 | 46.90 | a | 51.93 | 53.81 | 59.17 | 75.94 | 81.30 | 88.52 | 84.32 | 88.97 | 64.13 | 52.63 | 47.23 | 66.24 | ||||||||||||
| 1976 | 50.84 | 54.24 | 57.52 | 62.83 | 76.97 | 79.13 | 89.52 | 80.45 | 82.00 | 73.48 | 58.03 | 45.13 | 67.51 | |||||||||||||
| 1977 | 47.52 | 60.68 | 56.58 | 72.93 | 67.61 | 86.17 | 91.58 | 94.90 | 79.43 | 68.13 | 54.27 | 50.71 | 69.21 | |||||||||||||
| 1978 | 52.26 | 54.71 | 64.13 | 62.00 | 72.19 | 82.37 | 88.35 | 86.32 | 72.87 | 74.90 | 52.57 | 43.26 | 67.16 | |||||||||||||
| 1979 | 46.13 | 50.93 | 63.00 | 62.60 | 75.32 | 82.93 | 88.52 | 84.19 | 85.27 | 70.13 | 51.80 | 49.65 | 67.54 | |||||||||||||
| 1980 | 48.58 | 56.41 | 56.58 | 66.57 | 71.29 | 74.20 | 90.06 | 87.71 | 85.53 | 74.19 | 56.67 | 50.48 | 68.19 | |||||||||||||
| 1981 | 52.19 | 56.32 | 61.29 | 68.43 | 72.68 | 82.07 | b | 90.35 | 94.23 | 85.43 | 67.42 | 54.57 | 49.58 | 69.55 | ||||||||||||
| 1982 | 44.74 | 53.71 | 56.90 | 63.80 | 75.55 | 82.43 | 87.52 | 90.06 | 78.37 | 69.52 | 54.30 | 47.81 | 67.06 | |||||||||||||
| 1983 | 50.61 | 53.43 | 57.35 | 62.13 | 75.97 | 78.47 | 82.87 | 86.81 | 78.20 | 70.77 | 52.37 | 46.03 | 66.25 | |||||||||||||
| 1984 | 50.65 | 54.41 | 61.65 | 61.97 | 73.52 | 78.83 | a | 92.74 | 88.00 | 80.90 | 62.83 | a | 52.37 | 44.00 | 66.82 | |||||||||||
| 1985 | 50.52 | 54.86 | 56.97 | 72.10 | 73.23 | 85.33 | 94.39 | 89.65 | 76.50 | 68.90 | 48.07 | 48.35 | 68.24 | |||||||||||||
| 1986 | 54.81 | 55.68 | 65.90 | 67.03 | 74.42 | 85.57 | 86.06 | 93.94 | 73.53 | 71.45 | 56.90 | 49.16 | 69.54 | |||||||||||||
| 1987 | 50.55 | 55.43 | 60.16 | 73.63 | 77.45 | 88.93 | 84.61 | 92.94 | 83.07 | 78.68 | 56.97 | 47.35 | 70.81 | |||||||||||||
| 1988 | 48.42 | 61.31 | 62.77 | 67.40 | 71.68 | 79.47 | 92.87 | 92.39 | 87.80 | 81.39 | 55.33 | 48.13 | 70.75 | |||||||||||||
| 1989 | 48.81 | 51.04 | 58.16 | 72.63 | 73.68 | 85.07 | 85.55 | 85.52 | 83.40 | 70.71 | 57.87 | 49.81 | 68.52 | |||||||||||||
| 1990 | 50.65 | 53.25 | 63.90 | 73.00 | 71.81 | 81.00 | 92.23 | 87.19 | 85.97 | 70.87 | 54.23 | 42.81 | 68.91 | |||||||||||||
| 1991 | 51.55 | 61.39 | 55.77 | 63.30 | 69.35 | ----- | z | 91.73 | a | 90.61 | 89.70 | 89.75 | z | 59.50 | 45.58 | 67.85 | ||||||||||
| 1992 | 51.97 | 62.86 | 66.55 | 72.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.33 | 44.87 | 59.25 | |||||||
| 1993 | 46.97 | 52.25 | 62.90 | 64.20 | 76.13 | 80.77 | 84.03 | 89.35 | 89.37 | 75.65 | 54.93 | 49.55 | 68.84 | |||||||||||||
| 1994 | 52.32 | 53.86 | 66.48 | 67.90 | i | 77.84 | 83.90 | 96.55 | 90.74 | 88.83 | 71.74 | 47.93 | 49.61 | 70.89 | ||||||||||||
| 1995 | 52.45 | 63.21 | 58.84 | 65.73 | 75.42 | 78.57 | 89.77 | 90.00 | 87.37 | 74.42 | 61.37 | 52.45 | 70.80 | |||||||||||||
| 1996 | 48.74 | 58.83 | 65.10 | 68.90 | 72.90 | 82.90 | 96.00 | 94.03 | 81.83 | 69.90 | 56.93 | ----- | z | 72.37 | ||||||||||||
| 1997 | 49.81 | 55.79 | 63.68 | 66.70 | 80.29 | 80.60 | 89.19 | 90.26 | 82.07 | 67.55 | 58.07 | 48.16 | 69.35 | |||||||||||||
| 1998 | 52.77 | 55.75 | x | 61.07 | p | 62.03 | 71.89 | v | 81.40 | y | 91.60 | z | 94.75 | k | 83.33 | r | 69.44 | v | ----- | z | 52.00 | z | 57.40 | |||
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.50 | 49.42 | 49.96 | |||
| 2001 | 51.52 | 52.57 | 61.97 | 62.20 | 82.65 | 82.03 | 90.74 | 92.26 | 86.87 | 74.68 | 57.73 | 48.94 | 70.35 | |||||||||||||
| 2002 | 48.35 | 57.14 | 58.87 | 69.10 | 73.77 | 85.60 | 94.55 | 90.94 | 87.13 | 73.19 | 59.90 | 50.10 | 70.72 | |||||||||||||
| 2003 | 54.81 | 56.00 | 59.61 | 59.17 | 72.94 | 88.10 | 95.61 | 90.74 | 88.87 | 76.23 | 52.87 | 49.74 | 70.39 | |||||||||||||
| 2004 | 49.45 | 54.97 | 68.19 | 69.87 | 73.74 | 83.93 | 95.31 | e | 92.35 | 82.40 | 70.77 | 55.10 | 50.58 | 70.56 | ||||||||||||
| 2005 | 48.22 | d | 59.07 | 63.59 | b | 63.77 | 71.13 | 76.00 | 93.65 | 94.65 | 81.20 | 71.23 | 54.93 | 48.71 | 68.84 | |||||||||||
| 2006 | 49.87 | 56.96 | 53.42 | 63.67 | 77.61 | 83.80 | 94.03 | 88.29 | 86.00 | 71.55 | 56.10 | 49.61 | 69.24 | |||||||||||||
| 2007 | 47.42 | 54.07 | 64.72 | b | ----- | z | 76.84 | 82.57 | 90.03 | 89.13 | 81.52 | e | 65.06 | 57.96 | d | 46.16 | 68.68 | |||||||||
| 2008 | 45.87 | 54.62 | 57.00 | 62.53 | 74.03 | 82.03 | 91.61 | 90.83 | h | 88.24 | e | 71.19 | 55.70 | 46.26 | 66.28 | |||||||||||
| 2009 | 50.72 | f | 56.05 | g | 57.27 | e | 67.40 | e | 75.71 | c | 81.44 | c | 94.97 | b | 90.65 | 87.20 | e | 66.44 | f | 53.23 | 45.73 | e | 72.62 | |||
| 2010 | 52.19 | 56.45 | h | 60.06 | 59.70 | 67.58 | 76.72 | e | 91.57 | j | 88.65 | h | 80.90 | j | 72.36 | i | 53.70 | 49.00 | h | 61.66 | ||||||
| 2011 | 50.58 | g | 52.43 | g | 54.20 | f | 60.12 | d | 67.15 | e | 78.81 | d | 84.77 | 90.19 | d | 87.80 | 70.85 | e | 54.64 | e | 48.61 | c | 71.44 | |||
| 2012 | 51.25 | c | 55.57 | f | 55.37 | d | 64.64 | h | 75.88 | e | 77.85 | d | 89.69 | b | 93.43 | a | 88.93 | 73.16 | 56.23 | 50.52 | 71.23 | |||||
| 2013 | 47.70 | a | 54.11 | a | 64.04 | f | 62.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.00 | z | 50.91 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 49.25 | 55.57 | 60.08 | 65.11 | 74.25 | 81.71 | 90.29 | 89.60 | 83.80 | 70.90 | 54.88 | 47.65 | 68.55 | |||||||||||||
| S.D. | 2.60 | 3.26 | 3.89 | 4.57 | 3.29 | 3.27 | 3.57 | 3.27 | 4.42 | 3.84 | 2.78 | 2.47 | 1.49 | |||||||||||||
| SKEW | 0.06 | 0.56 | 0.17 | 0.10 | 0.01 | -0.07 | -0.23 | -0.47 | -0.49 | 0.26 | -0.26 | -0.31 | -0.22 | |||||||||||||
| MAX | 54.81 | 63.21 | 68.19 | 73.63 | 82.65 | 88.93 | 96.55 | 94.90 | 91.77 | 81.39 | 61.37 | 52.45 | 70.81 | |||||||||||||
| MIN | 43.23 | 49.29 | 53.42 | 54.60 | 67.15 | 74.20 | 82.87 | 80.45 | 72.87 | 62.83 | 47.93 | 42.81 | 64.76 | |||||||||||||
| NO YRS | 46 | 43 | 44 | 45 | 46 | 45 | 45 | 44 | 44 | 42 | 47 | 46 | 35 | |||||||||||||