| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.83 | a | 74.07 | 64.55 | 52.73 | 42.37 | 62.91 | |||||
| 1976 | 44.06 | 49.66 | 51.16 | 58.48 | 68.32 | 77.28 | 80.53 | 78.73 | a | 71.80 | 60.77 | 51.78 | 44.26 | 61.40 | ||||||||||||
| 1977 | 43.68 | 49.80 | 48.19 | 60.67 | 63.03 | 77.11 | h | 81.39 | 81.63 | a | 75.53 | a | 65.31 | 54.00 | 48.60 | 61.08 | ||||||||||
| 1978 | 43.63 | 46.73 | 54.48 | b | 58.52 | 65.97 | 77.83 | 80.71 | b | 78.42 | 73.37 | 67.21 | 51.80 | 40.24 | 61.58 | |||||||||||
| 1979 | 39.15 | 45.61 | 50.66 | 59.35 | 65.48 | 75.85 | 81.08 | 76.27 | 75.88 | d | 67.12 | a | 48.57 | 45.24 | 60.86 | |||||||||||
| 1980 | 45.26 | b | 48.88 | 49.94 | 59.02 | ----- | z | 76.57 | 81.73 | 78.77 | 73.97 | 62.77 | 52.20 | 49.31 | 61.67 | |||||||||||
| 1981 | 47.42 | 50.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.74 | |||
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | ----- | z | ----- | z | 9999.00 | |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.15 | 81.74 | 79.52 | 69.45 | 57.98 | 44.56 | 69.40 | |||||||
| 2002 | 46.92 | 51.61 | 54.84 | 66.75 | 72.19 | 83.85 | 85.26 | 83.26 | 77.58 | 64.61 | 55.32 | 45.21 | 65.62 | |||||||||||||
| 2003 | 52.79 | 49.18 | 53.94 | 59.97 | 72.45 | 81.40 | 86.95 | 83.79 | 77.83 | 71.35 | 53.28 | 46.45 | 65.78 | |||||||||||||
| 2004 | 47.03 | 46.22 | 60.84 | 60.73 | 73.23 | ----- | z | 83.47 | ----- | z | ----- | z | ----- | z | 50.87 | 45.61 | 58.50 | |||||||||
| 2005 | 48.37 | 50.34 | 53.92 | 61.75 | 71.08 | 78.42 | 84.37 | 80.55 | 76.90 | 66.56 | 55.55 | 46.95 | 64.56 | |||||||||||||
| 2006 | 47.74 | 51.54 | 52.77 | 62.45 | 72.27 | 82.12 | 83.98 | 79.79 | 72.67 | 63.24 | 55.62 | 45.03 | 64.10 | |||||||||||||
| 2007 | 42.84 | 50.00 | 57.94 | 62.57 | 71.98 | 79.72 | 84.47 | 82.94 | 78.20 | 66.98 | 58.80 | 44.11 | 65.05 | |||||||||||||
| 2008 | 45.10 | 48.98 | 54.94 | 60.88 | 66.48 | 79.60 | 82.03 | 80.76 | 75.17 | 64.92 | 55.53 | 44.56 | 63.25 | |||||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 45.69 | 49.12 | 53.63 | 60.93 | 69.32 | 79.26 | 83.01 | 80.58 | 75.58 | 65.76 | 53.86 | 45.18 | 63.58 | |||||||||||||
| S.D. | 3.30 | 1.88 | 3.48 | 2.31 | 3.56 | 2.57 | 1.96 | 2.16 | 2.35 | 2.81 | 2.80 | 2.30 | 1.89 | |||||||||||||
| SKEW | 0.17 | -0.63 | 0.46 | 1.28 | -0.47 | 0.41 | 0.43 | -0.31 | 0.04 | 0.24 | 0.03 | -0.18 | -0.30 | |||||||||||||
| MAX | 52.79 | 51.61 | 60.84 | 66.75 | 73.23 | 83.85 | 86.95 | 83.79 | 79.52 | 71.35 | 58.80 | 49.31 | 65.78 | |||||||||||||
| MIN | 39.15 | 45.61 | 48.19 | 58.48 | 63.03 | 75.85 | 80.53 | 76.27 | 71.80 | 60.77 | 48.57 | 40.24 | 60.86 | |||||||||||||
| NO YRS | 13 | 13 | 12 | 12 | 11 | 10 | 13 | 13 | 13 | 13 | 14 | 14 | 9 | |||||||||||||