| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | 61.53 | 66.35 | 75.85 | 71.29 | 61.07 | 50.15 | 38.43 | 34.47 | 57.39 | |||||||||
| 1974 | 27.11 | 35.68 | 40.27 | 47.02 | b | ----- | z | 70.07 | 71.56 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.03 | |||||
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 65.97 | 62.42 | 51.47 | 33.15 | 30.68 | a | 48.74 | |||||
| 1994 | 35.56 | 32.57 | 44.48 | 50.48 | 57.19 | 65.87 | 75.65 | 74.21 | 64.87 | 48.81 | 32.05 | 27.69 | 50.79 | |||||||||||||
| 1995 | 33.90 | 43.55 | 40.82 | 44.67 | 53.50 | 60.55 | 70.44 | 69.47 | 64.07 | 50.32 | 44.87 | 31.52 | 50.64 | |||||||||||||
| 1996 | 34.21 | 34.47 | 42.90 | 46.98 | 53.37 | 63.92 | 74.18 | 71.42 | 59.15 | 50.15 | 41.13 | 36.13 | 50.67 | |||||||||||||
| 1997 | 31.89 | 34.79 | 43.84 | 44.38 | 60.45 | 63.08 | 69.90 | 71.65 | 62.62 | 48.68 | 41.07 | 29.31 | 50.14 | |||||||||||||
| 1998 | 37.29 | 34.77 | 41.47 | 45.10 | 50.27 | 59.10 | 75.79 | 73.60 | 64.47 | 47.73 | 38.22 | 27.55 | 49.61 | |||||||||||||
| 1999 | 34.69 | 34.41 | 39.40 | 43.38 | a | 53.19 | b | 62.48 | c | 71.16 | b | 70.35 | a | 61.02 | a | 53.12 | c | 44.93 | c | 32.27 | 50.03 | |||||
| 2000 | 33.61 | 39.04 | a | 40.85 | a | 51.52 | b | 56.24 | b | 66.67 | d | 74.15 | d | 74.20 | c | 60.56 | d | 49.56 | d | 33.09 | b | 32.04 | f | 52.68 | ||
| 2001 | 27.68 | 32.78 | l | 43.06 | 43.21 | b | 59.44 | d | 64.46 | d | 71.00 | b | 74.31 | d | 64.91 | c | 52.95 | b | 40.19 | a | 30.90 | b | 52.01 | |||
| 2002 | 31.77 | 33.77 | 38.74 | 49.22 | 53.38 | c | 66.07 | c | 77.40 | 68.74 | h | 62.88 | 47.57 | b | 39.27 | 36.03 | 48.74 | |||||||||
| 2003 | 38.44 | 34.43 | 44.27 | 43.37 | d | 55.21 | 66.66 | h | 79.62 | e | 72.62 | k | 63.92 | 56.50 | f | 34.32 | 35.00 | 47.62 | ||||||||
| 2004 | 29.54 | g | 33.67 | 47.52 | 48.65 | 55.52 | 65.34 | e | 75.06 | g | 68.58 | m | 61.68 | 51.76 | h | 37.00 | g | 31.55 | l | 52.06 | ||||||
| 2005 | 29.10 | j | 36.08 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.32 | 38.47 | 30.73 | 40.17 | ||||
| 2006 | 35.24 | 33.38 | 36.89 | 46.33 | 57.31 | 67.67 | 78.77 | 70.55 | 62.00 | 50.18 | 39.93 | 30.15 | 50.70 | |||||||||||||
| 2007 | 27.27 | 37.46 | 46.41 | b | 47.37 | 59.63 | 67.38 | 78.68 | 73.18 | 60.42 | 48.90 | 40.57 | 28.69 | 51.33 | ||||||||||||
| 2008 | 26.27 | 35.78 | 39.02 | 43.47 | 54.85 | 64.13 | 74.98 | 73.24 | ----- | z | 51.70 | c | 43.65 | 31.45 | 48.96 | |||||||||||
| 2009 | 32.45 | 34.39 | 39.24 | l | 45.88 | 59.44 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.04 | |||||
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.25 | z | 62.43 | 52.66 | 36.87 | 32.94 | 46.22 | |||||
| 2011 | 30.26 | 34.04 | 39.92 | 42.46 | c | 49.03 | 58.69 | a | 70.81 | b | 73.94 | d | 66.31 | a | 51.29 | g | 35.79 | d | 29.16 | b | 48.22 | |||||
| 2012 | 32.13 | 34.50 | d | 42.55 | 49.78 | 55.65 | 62.32 | 76.52 | a | 74.43 | b | 65.87 | 53.22 | f | 41.52 | 31.40 | 51.51 | |||||||||
| 2013 | 19.90 | 35.04 | 42.18 | 55.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.37 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.65 | 35.32 | 41.92 | 46.29 | 55.84 | 64.36 | 74.68 | 72.12 | 62.81 | 50.33 | 38.82 | 31.45 | 50.49 | |||||||||||||
| S.D. | 4.58 | 2.53 | 2.76 | 2.77 | 3.44 | 3.08 | 3.20 | 2.37 | 2.01 | 1.76 | 3.84 | 2.63 | 0.53 | |||||||||||||
| SKEW | -0.86 | 2.15 | 0.26 | 0.36 | -0.17 | -0.27 | -0.12 | -1.15 | 0.08 | 0.10 | -0.19 | 0.39 | -0.75 | |||||||||||||
| MAX | 38.44 | 43.55 | 47.52 | 51.52 | 61.53 | 70.07 | 79.62 | 74.43 | 66.31 | 53.12 | 44.93 | 36.13 | 51.33 | |||||||||||||
| MIN | 19.90 | 32.57 | 36.89 | 42.46 | 49.03 | 58.69 | 69.90 | 65.97 | 59.15 | 47.57 | 32.05 | 27.55 | 49.61 | |||||||||||||
| NO YRS | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 15 | 18 | 16 | 19 | 18 | 8 | |||||||||||||