| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.39 | 40.45 | 27.79 | 39.54 | ||||
| 1977 | 19.23 | 32.05 | 39.37 | 52.85 | 52.68 | 70.15 | 70.87 | 71.60 | 60.07 | 49.00 | ----- | z | 35.92 | 50.34 | ||||||||||||
| 1978 | 34.61 | 36.23 | ----- | z | 47.85 | 54.60 | a | 63.95 | 71.88 | a | 68.12 | a | 58.57 | 50.32 | a | 33.60 | a | 25.89 | 49.60 | |||||||
| 1979 | 14.98 | a | 31.48 | 42.60 | 47.53 | 58.16 | 65.62 | 72.31 | 68.58 | 63.37 | 51.50 | 32.63 | 31.82 | 48.38 | ||||||||||||
| 1980 | 28.52 | 35.90 | 39.27 | 51.42 | 55.71 | ----- | z | 71.16 | 65.15 | 56.67 | 46.87 | 35.15 | 29.55 | 46.85 | ||||||||||||
| 1981 | 31.71 | 34.73 | 41.66 | 47.65 | 54.39 | 61.57 | 69.35 | 72.29 | 64.22 | 48.13 | 43.60 | 35.52 | 50.40 | |||||||||||||
| 1982 | 25.11 | 30.43 | 42.42 | 46.17 | 55.97 | 66.62 | 70.95 | 72.61 | 59.90 | 48.94 | 35.85 | 31.05 | 48.83 | |||||||||||||
| 1983 | 32.58 | 40.25 | 45.00 | 47.03 | 57.21 | 64.83 | 70.23 | 74.31 | 60.32 | 51.90 | 42.95 | 25.16 | 50.98 | |||||||||||||
| 1984 | 23.73 | 30.10 | 43.06 | 47.75 | 55.81 | 63.23 | 74.52 | 75.47 | 58.78 | 46.81 | 39.77 | 23.83 | a | 48.57 | ||||||||||||
| 1985 | 19.89 | 26.28 | a | 37.35 | 53.22 | 59.63 | 67.83 | 77.60 | 68.37 | ----- | z | 47.29 | 28.53 | 14.11 | 45.46 | |||||||||||
| 1986 | 27.15 | 40.39 | 48.68 | 49.60 | 59.32 | 72.62 | 69.69 | 75.27 | 57.78 | 51.52 | 41.55 | 29.02 | 51.88 | |||||||||||||
| 1987 | 27.42 | 37.55 | 44.42 | 56.60 | 62.84 | 69.05 | 70.79 | 69.29 | 63.55 | 53.16 | 41.45 | 33.44 | 52.46 | |||||||||||||
| 1988 | 25.50 | 36.03 | 43.47 | 52.38 | 58.34 | 70.28 | 74.68 | 70.87 | 59.85 | 58.11 | 41.03 | 28.06 | 51.55 | |||||||||||||
| 1989 | 22.89 | 20.27 | 43.00 | 53.00 | 57.00 | 68.83 | 74.94 | 69.08 | 61.78 | 50.71 | 39.08 | 32.61 | 49.43 | |||||||||||||
| 1990 | 34.92 | 33.89 | 44.45 | 55.43 | 56.32 | 66.37 | 74.87 | 73.52 | 68.17 | 49.94 | 39.50 | 18.02 | 51.28 | |||||||||||||
| 1991 | 24.24 | 39.80 | 42.92 | 48.68 | 54.82 | 63.10 | 74.18 | 74.79 | 63.53 | 51.87 | 36.88 | 31.45 | 50.52 | |||||||||||||
| 1992 | 32.10 | 40.88 | 48.61 | 53.80 | 62.58 | 69.38 | 70.50 | 72.61 | 61.53 | 53.82 | 35.58 | 28.74 | 52.51 | |||||||||||||
| 1993 | 25.66 | 29.70 | 40.89 | 48.27 | 62.26 | 62.50 | 65.90 | 68.44 | 62.83 | 52.76 | 33.52 | 34.44 | 48.93 | |||||||||||||
| 1994 | 33.13 | 33.71 | 46.73 | 53.03 | 60.60 | 66.62 | 75.73 | 74.73 | 65.40 | 50.60 | 33.60 | 30.52 | 52.03 | |||||||||||||
| 1995 | 35.98 | 41.64 | 43.81 | 49.78 | 58.18 | ----- | z | 73.23 | 69.44 | 64.88 | 49.47 | 43.95 | 33.61 | 51.27 | ||||||||||||
| 1996 | 33.74 | 35.59 | 45.19 | 50.65 | 56.76 | 66.35 | 75.56 | 71.79 | 59.88 | 50.61 | 41.52 | 36.45 | 52.01 | |||||||||||||
| 1997 | 33.55 | 37.59 | 45.16 | 49.35 | 62.60 | 67.12 | 71.40 | 73.00 | 65.53 | 50.84 | 42.15 | 30.89 | 52.43 | |||||||||||||
| 1998 | 37.45 | 40.09 | 44.11 | 49.95 | 57.15 | 64.05 | 78.21 | 74.60 | 68.07 | 50.24 | 42.30 | 29.97 | 53.02 | |||||||||||||
| 1999 | 35.44 | 36.48 | 43.79 | 47.20 | 56.34 | 65.80 | 72.18 | 73.68 | 62.18 | 53.21 | 45.72 | 33.65 | 52.14 | |||||||||||||
| 2000 | 34.11 | 41.79 | 43.35 | 54.90 | 60.34 | 67.38 | a | 75.32 | 74.65 | 61.72 | 52.32 | 33.67 | 31.89 | 52.62 | ||||||||||||
| 2001 | 27.39 | 33.20 | 45.95 | 48.17 | 61.85 | 66.88 | 74.95 | 76.53 | 66.10 | 52.10 | 44.15 | 31.37 | 52.39 | |||||||||||||
| 2002 | 32.53 | 34.02 | 40.61 | 51.15 | 58.24 | 69.17 | 78.00 | 70.08 | 63.98 | 48.82 | 39.55 | 36.63 | 51.90 | |||||||||||||
| 2003 | 37.69 | 37.41 | 46.10 | 49.75 | 58.87 | 69.58 | 79.61 | 75.90 | 64.90 | 57.39 | 37.47 | 37.56 | 54.35 | |||||||||||||
| 2004 | 28.34 | 34.33 | 48.32 | 53.50 | 58.48 | 68.80 | 76.98 | 73.81 | 62.67 | 53.24 | 38.70 | 34.85 | 52.67 | |||||||||||||
| 2005 | 32.81 | 36.29 | 45.92 | 50.33 | 58.56 | 64.50 | 76.55 | 74.56 | ----- | z | 52.65 | 37.32 | 28.19 | 50.70 | ||||||||||||
| 2006 | 36.74 | 34.61 | 42.94 | 51.05 | 61.11 | 70.78 | 80.23 | 72.98 | 63.35 | 50.79 | 42.15 | 31.18 | 53.16 | |||||||||||||
| 2007 | 29.15 | 38.36 | 47.84 | 51.10 | 62.03 | 69.40 | 80.74 | 73.50 | 63.95 | 50.97 | 39.83 | 32.31 | 53.26 | |||||||||||||
| 2008 | 29.00 | 36.10 | 41.13 | 45.53 | 59.48 | 66.35 | 76.39 | 75.05 | 63.13 | 51.65 | 42.62 | 30.94 | 51.45 | |||||||||||||
| 2009 | 31.31 | 36.41 | 41.45 | 50.30 | 60.34 | 67.82 | 76.48 | 72.96 | e | 67.56 | e | 47.58 | 40.52 | 26.29 | 51.58 | |||||||||||
| 2010 | 36.19 | 39.16 | 44.61 | 47.98 | 52.68 | 65.13 | 73.85 | 71.40 | 63.53 | 55.27 | 38.18 | 32.55 | 51.71 | |||||||||||||
| 2011 | 28.92 | 33.54 | 42.53 | 44.25 | 54.98 | 63.00 | 72.85 | 76.32 | 68.13 | 53.53 | 38.57 | 29.84 | 50.54 | |||||||||||||
| 2012 | 33.58 | 37.57 | 45.21 | 53.48 | 57.05 | 66.42 | 79.02 | 75.82 | 65.47 | 51.02 | 43.17 | 36.53 | 53.69 | |||||||||||||
| 2013 | 17.60 | 36.30 | 44.39 | 55.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.76 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 29.59 | 35.41 | 43.79 | 50.30 | 58.15 | 66.80 | 74.21 | 72.53 | 62.98 | 51.22 | 39.06 | 30.58 | 51.56 | |||||||||||||
| S.D. | 5.80 | 4.37 | 2.63 | 2.93 | 2.80 | 2.66 | 3.43 | 2.80 | 2.99 | 2.55 | 3.92 | 4.88 | 1.53 | |||||||||||||
| SKEW | -0.71 | -1.22 | -0.14 | 0.13 | -0.03 | 0.00 | -0.08 | -0.66 | -0.11 | 0.56 | -0.62 | -1.38 | -0.60 | |||||||||||||
| MAX | 37.69 | 41.79 | 48.68 | 56.60 | 62.84 | 72.62 | 80.74 | 76.53 | 68.17 | 58.11 | 45.72 | 37.56 | 54.35 | |||||||||||||
| MIN | 14.98 | 20.27 | 37.35 | 44.25 | 52.68 | 61.57 | 65.90 | 65.15 | 56.67 | 46.81 | 28.53 | 14.11 | 48.38 | |||||||||||||
| NO YRS | 37 | 37 | 36 | 36 | 36 | 34 | 36 | 36 | 34 | 37 | 36 | 37 | 30 | |||||||||||||