| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.37 | 58.78 | ----- | z | ----- | z | ----- | z | 63.58 | |||
| 1982 | 35.24 | 36.18 | 42.37 | 46.00 | 53.84 | 63.32 | 66.08 | 67.61 | 60.15 | 48.34 | 34.53 | 31.21 | 48.74 | |||||||||||||
| 1983 | 37.73 | 38.04 | 44.08 | 47.17 | 56.79 | 59.90 | 63.03 | 62.81 | 51.07 | 46.24 | 42.28 | 25.31 | 47.87 | |||||||||||||
| 1984 | 34.21 | 36.83 | 43.71 | 44.52 | 49.55 | 56.08 | 63.85 | 64.18 | 55.28 | 45.31 | 38.27 | 31.63 | 46.95 | |||||||||||||
| 1985 | 28.26 | 34.27 | 40.19 | 48.47 | 52.63 | 58.17 | 68.06 | 61.45 | 52.67 | 47.69 | 29.95 | a | 22.81 | 45.38 | ||||||||||||
| 1986 | 35.26 | 36.68 | 45.84 | 45.30 | 53.63 | 63.05 | 60.74 | 68.00 | 54.35 | 50.98 | 41.65 | 31.98 | 48.96 | |||||||||||||
| 1987 | 31.21 | 36.96 | 41.82 | 50.68 | 55.24 | 61.38 | 62.55 | 63.75 | a | 60.12 | 52.82 | 41.45 | 32.34 | 49.19 | ||||||||||||
| 1988 | 31.21 | 38.67 | 42.39 | 48.38 | 51.63 | 57.27 | 64.48 | 62.40 | 58.60 | 55.82 | 41.35 | 35.34 | 48.96 | |||||||||||||
| 1989 | 37.95 | 27.34 | 39.23 | 49.75 | 52.29 | 60.43 | 60.94 | 61.68 | 58.75 | 48.81 | 43.85 | 35.03 | 48.00 | |||||||||||||
| 1990 | 38.18 | 34.25 | 43.61 | 50.70 | 51.42 | 58.83 | 66.95 | 66.05 | 61.95 | 47.16 | 43.35 | 26.82 | 49.11 | |||||||||||||
| 1991 | 33.90 | 42.45 | 39.81 | 45.57 | 50.10 | 55.32 | 65.02 | 66.39 | 60.60 | 50.00 | 40.70 | 36.10 | 48.83 | |||||||||||||
| 1992 | 38.52 | 41.31 | 46.19 | 49.60 | 57.03 | 63.62 | 64.74 | 65.05 | 56.80 | 50.69 | 39.95 | 31.31 | 50.40 | |||||||||||||
| 1993 | 26.63 | 30.12 | 40.39 | 46.17 | 56.27 | 57.36 | a | 58.76 | 62.44 | 59.43 | 52.21 | 34.48 | 33.68 | 46.50 | ||||||||||||
| 1994 | 39.53 | 34.27 | 43.19 | 49.27 | 54.66 | 57.13 | 66.34 | 63.61 | 61.72 | 48.37 | 36.27 | 34.74 | 49.09 | |||||||||||||
| 1995 | 33.31 | 41.20 | 41.50 | 45.35 | 54.81 | 57.68 | 65.19 | 60.77 | 61.13 | 47.90 | 45.38 | 34.23 | 49.04 | |||||||||||||
| 1996 | 35.23 | 32.55 | 42.21 | 48.68 | 50.15 | 57.35 | 67.52 | 64.89 | 56.45 | 48.90 | 39.28 | 32.84 | 48.00 | |||||||||||||
| 1997 | 33.50 | 38.45 | 42.47 | 45.12 | 56.65 | 58.65 | 64.26 | 66.92 | 60.63 | 49.98 | 42.42 | 35.68 | 49.56 | |||||||||||||
| 1998 | 36.42 | 38.75 | ----- | z | ----- | z | 53.75 | z | 59.77 | 68.32 | 66.32 | 62.35 | 47.45 | 42.15 | 34.13 | 50.63 | ||||||||||
| 1999 | 39.05 | 37.84 | 40.71 | 45.40 | 50.21 | 57.70 | 62.71 | 65.73 | 57.88 | 49.18 | 42.50 | 37.94 | 48.90 | |||||||||||||
| 2000 | 33.52 | 36.93 | 40.74 | 49.90 | 52.90 | 59.47 | 63.13 | 63.21 | 58.48 | 48.44 | 35.08 | 31.53 | 47.78 | |||||||||||||
| 2001 | 33.52 | 36.35 | a | 43.44 | 45.85 | 55.52 | 56.40 | 63.03 | 64.81 | 59.90 | 48.45 | 41.08 | 34.85 | 48.60 | ||||||||||||
| 2002 | 35.63 | 39.21 | 40.42 | 48.00 | 51.73 | 60.28 | 66.84 | 63.00 | 58.03 | 47.69 | 38.50 | 35.53 | 48.74 | |||||||||||||
| 2003 | 37.48 | 38.71 | 44.53 | 45.55 | 53.69 | 61.92 | 67.00 | 65.42 | 61.15 | 52.60 | 36.73 | 34.44 | 49.94 | |||||||||||||
| 2004 | 31.05 | 37.93 | 46.35 | 49.38 | 53.89 | 60.95 | 66.81 | 66.97 | 57.62 | 50.95 | 41.30 | 37.48 | 50.06 | |||||||||||||
| 2005 | 34.71 | 38.11 | 45.82 | 47.45 | 55.61 | 56.43 | 64.48 | 64.44 | 57.15 | 50.21 | 38.55 | 29.89 | 48.57 | |||||||||||||
| 2006 | 37.95 | 35.20 | 40.97 | 47.53 | ----- | z | 60.40 | 66.94 | 63.02 | 59.03 | 48.92 | 39.82 | 31.97 | 48.34 | ||||||||||||
| 2007 | 31.52 | 38.14 | 46.03 | 46.60 | 54.15 | 58.67 | 67.47 | 62.81 | 57.30 | 47.16 | 39.43 | 34.65 | 48.66 | |||||||||||||
| 2008 | 30.92 | 40.00 | 40.76 | 42.98 | 54.44 | 57.23 | 65.02 | 64.87 | 58.55 | 48.81 | 42.58 | 32.05 | 48.18 | |||||||||||||
| 2009 | 34.24 | 34.71 | 38.44 | 45.37 | 53.85 | 60.60 | 66.74 | 65.00 | 60.53 | 46.71 | 40.00 | 27.97 | 47.85 | |||||||||||||
| 2010 | 37.11 | 38.89 | 42.66 | 45.45 | 50.02 | 56.95 | b | 63.44 | 63.08 | 56.73 | 48.27 | 37.07 | 31.81 | 47.62 | ||||||||||||
| 2011 | 35.26 | 34.18 | 38.58 | 41.35 | 48.74 | 56.10 | 60.66 | 63.92 | a | 61.45 | 48.98 | 38.02 | 32.47 | 46.64 | ||||||||||||
| 2012 | 32.53 | 35.60 | 38.63 | 46.12 | 50.15 | 56.02 | 63.53 | 64.55 | 59.33 | 48.10 | 39.67 | 33.44 | 47.30 | |||||||||||||
| 2013 | 29.27 | 37.88 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.57 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 34.38 | 36.81 | 42.24 | 46.92 | 53.16 | 58.85 | 64.67 | 64.48 | 58.56 | 49.13 | 39.60 | 32.62 | 48.39 | |||||||||||||
| S.D. | 3.24 | 3.12 | 2.38 | 2.26 | 2.41 | 2.31 | 2.42 | 1.94 | 2.63 | 2.17 | 3.26 | 3.36 | 1.12 | |||||||||||||
| SKEW | -0.43 | -0.94 | 0.21 | -0.20 | -0.14 | 0.47 | -0.50 | 0.18 | -0.98 | 1.03 | -0.86 | -1.09 | -0.67 | |||||||||||||
| MAX | 39.53 | 42.45 | 46.35 | 50.70 | 57.03 | 63.62 | 68.32 | 68.37 | 62.35 | 55.82 | 45.38 | 37.94 | 50.40 | |||||||||||||
| MIN | 26.63 | 27.34 | 38.44 | 41.35 | 48.74 | 55.32 | 58.76 | 60.77 | 51.07 | 45.31 | 29.95 | 22.81 | 45.38 | |||||||||||||
| NO YRS | 32 | 32 | 30 | 30 | 29 | 31 | 31 | 32 | 32 | 31 | 31 | 31 | 29 | |||||||||||||