| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1978 | ----- | z | ----- | z | 46.58 | 42.07 | 48.84 | 59.90 | 68.10 | 65.45 | 55.50 | 57.52 | 41.50 | 34.00 | 51.95 | |||||||||||
| 1979 | 36.13 | 35.86 | 44.26 | 43.77 | 53.77 | 62.17 | 65.29 | 63.48 | 63.23 | 55.16 | 45.20 | 42.97 | 50.94 | |||||||||||||
| 1980 | 37.19 | 42.79 | 38.65 | 48.10 | 51.55 | 52.00 | 64.55 | 66.06 | 60.33 | 55.87 | 45.53 | 45.55 | 50.68 | |||||||||||||
| 1981 | 46.00 | 43.07 | 41.58 | 44.37 | 49.42 | 54.10 | 64.58 | 68.74 | 61.67 | 51.77 | 43.90 | 38.42 | 50.64 | |||||||||||||
| 1982 | 35.42 | 36.21 | 38.58 | 40.50 | 50.97 | 61.67 | 63.68 | 66.13 | 59.30 | 51.29 | 39.60 | 38.55 | 48.49 | |||||||||||||
| 1983 | 41.81 | 39.54 | 41.13 | 45.80 | 55.90 | 53.13 | 58.65 | 64.26 | 57.83 | 53.97 | 40.67 | 32.71 | 48.78 | |||||||||||||
| 1984 | 43.61 | 41.07 | 43.00 | 41.33 | 49.23 | 54.23 | 67.06 | 66.55 | 58.93 | 46.35 | 40.10 | 34.81 | 48.86 | |||||||||||||
| 1985 | 45.65 | 36.32 | 39.42 | 48.13 | 52.29 | 60.63 | 72.77 | 65.42 | 55.83 | 50.42 | 33.83 | 47.00 | 50.64 | |||||||||||||
| 1986 | 42.52 | 39.43 | 46.81 | 43.70 | 50.84 | 62.50 | 59.32 | 73.93 | b | 55.17 | 56.65 | 45.37 | 42.16 | 51.53 | ||||||||||||
| 1987 | 37.45 | 40.61 | 41.68 | 52.87 | 55.52 | 63.85 | c | 61.19 | 67.19 | 65.10 | 62.42 | 44.45 | a | 38.93 | a | 52.60 | ||||||||||
| 1988 | 38.03 | 43.44 | b | 41.13 | 45.27 | 49.77 | 55.55 | a | 65.71 | 64.43 | a | 62.07 | 60.35 | 41.13 | 40.87 | 50.65 | ||||||||||
| 1989 | 37.58 | 29.21 | 36.97 | 51.10 | 50.65 | 60.90 | 58.52 | 60.68 | 64.07 | 49.74 | 46.93 | 47.00 | 49.45 | |||||||||||||
| 1990 | 42.45 | 36.11 | 43.58 | 50.47 | 48.16 | 54.07 | 67.81 | 65.77 | 63.43 | 49.03 | 41.87 | 32.35 | 49.59 | |||||||||||||
| 1991 | ----- | z | 48.04 | 36.68 | 43.17 | 46.23 | 52.27 | 65.94 | 66.26 | 65.60 | 57.35 | 44.07 | 41.71 | 51.57 | ||||||||||||
| 1992 | 41.61 | 46.38 | 49.61 | 47.47 | 60.58 | 62.57 | 65.23 | 70.71 | 59.00 | 53.55 | 44.23 | 34.58 | 52.96 | |||||||||||||
| 1993 | 33.19 | 36.46 | 43.55 | 41.43 | 54.55 | 53.90 | 55.23 | 63.42 | 65.17 | 56.97 | 42.23 | 40.94 | 48.92 | |||||||||||||
| 1994 | 44.16 | 37.54 | 44.45 | 46.87 | 53.23 | 54.30 | 68.61 | 63.13 | 63.77 | 50.00 | 34.70 | 35.87 | 49.72 | |||||||||||||
| 1995 | 39.71 | 45.61 | 39.68 | 42.80 | 54.81 | 58.87 | 65.84 | 62.58 | 64.20 | 51.77 | 47.90 | 42.26 | 51.33 | |||||||||||||
| 1996 | 40.06 | 44.55 | 44.65 | 46.50 | 48.52 | 57.90 | 70.52 | 68.68 | 58.23 | 51.26 | 46.33 | 39.26 | 51.37 | |||||||||||||
| 1997 | 38.94 | 40.04 | 40.45 | 43.47 | 57.55 | 56.73 | 65.29 | 68.26 | 64.07 | 52.26 | 46.43 | 42.74 | 51.35 | |||||||||||||
| 1998 | 39.94 | 38.29 | 42.52 | 47.37 | 49.29 | 60.30 | 69.97 | 68.90 | 66.23 | 51.65 | 39.97 | 34.70 | a | 50.76 | ||||||||||||
| 1999 | 38.90 | a | 34.54 | 35.52 | 42.73 | 46.94 | 54.30 | 63.90 | 65.68 | 64.20 | 54.13 | 45.17 | 42.55 | 49.05 | ||||||||||||
| 2000 | 37.00 | 42.79 | 41.94 | 52.77 | 51.87 | 62.33 | 65.52 | 72.31 | o | 65.53 | m | 52.75 | o | 42.59 | m | 43.21 | q | 50.60 | ||||||||
| 2001 | 40.68 | 38.21 | 45.52 | 42.17 | 60.10 | b | 58.72 | a | 68.39 | c | 68.17 | a | 66.27 | 54.26 | 44.50 | 37.42 | 52.03 | |||||||||
| 2002 | 35.81 | 39.54 | 39.23 | 46.40 | 51.90 | 65.08 | f | 72.67 | j | 71.58 | 67.37 | 56.03 | 50.17 | a | 40.47 | l | 50.89 | |||||||||
| 2003 | 46.29 | 40.64 | 40.81 | d | 40.77 | 53.55 | 68.62 | i | 72.12 | e | 71.61 | 65.33 | 53.87 | 37.57 | 40.00 | j | 52.26 | |||||||||
| 2004 | 39.65 | 39.07 | 47.29 | 50.63 | 55.18 | n | 60.47 | 71.55 | 70.10 | a | 58.67 | 54.45 | 44.67 | 42.35 | 52.63 | |||||||||||
| 2005 | 40.83 | g | 44.11 | 44.39 | 44.37 | 51.87 | 56.58 | f | 67.84 | f | 72.87 | 62.77 | 50.26 | 41.71 | f | 39.81 | 51.30 | |||||||||
| 2006 | 39.06 | 41.95 | f | 34.97 | 46.23 | 54.45 | 60.70 | g | 72.82 | n | 71.23 | e | 67.30 | 54.65 | 41.67 | f | 42.04 | e | 51.24 | |||||||
| 2007 | 40.17 | g | 40.32 | 45.31 | b | 45.43 | 54.74 | 59.29 | i | 65.67 | m | 66.45 | 64.72 | l | 53.62 | o | 45.50 | 35.68 | 47.63 | |||||||
| 2008 | 33.88 | w | 46.67 | z | 39.00 | s | 35.31 | q | 52.23 | r | 56.33 | r | 72.30 | k | 67.16 | 66.53 | 53.74 | 47.10 | 36.26 | 54.16 | ||||||
| 2009 | 47.29 | 39.89 | 36.52 | 45.60 | 56.71 | 60.67 | 74.45 | 68.03 | 65.97 | 50.55 | 41.43 | 38.03 | 52.10 | |||||||||||||
| 2010 | 41.35 | 42.21 | 42.23 | 42.33 | 47.81 | 54.50 | 70.39 | 70.16 | 59.07 | 52.94 | 40.20 | 36.39 | 49.96 | |||||||||||||
| 2011 | 41.77 | 35.43 | 35.87 | 39.20 | 46.90 | 55.43 | 63.58 | 70.06 | 68.70 | 50.61 | 40.70 | 43.42 | 49.31 | |||||||||||||
| 2012 | 40.94 | 38.31 | 36.74 | 45.93 | 53.03 | 54.63 | 66.97 | 72.87 | 69.30 | 53.42 | 43.43 | 34.48 | 50.84 | |||||||||||||
| 2013 | 40.29 | 38.18 | 41.46 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.98 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.34 | 39.81 | 41.51 | 45.33 | 52.17 | 57.68 | 66.02 | 67.53 | 62.73 | 53.46 | 43.01 | 39.24 | 50.50 | |||||||||||||
| S.D. | 3.41 | 3.86 | 3.69 | 3.49 | 3.65 | 3.68 | 4.47 | 3.25 | 3.90 | 3.32 | 3.63 | 4.06 | 1.25 | |||||||||||||
| SKEW | 0.18 | -0.18 | 0.03 | 0.49 | 0.44 | 0.06 | -0.38 | 0.06 | -0.37 | 0.52 | -0.61 | 0.11 | 0.10 | |||||||||||||
| MAX | 47.29 | 48.04 | 49.61 | 52.87 | 60.58 | 63.85 | 74.45 | 73.93 | 69.30 | 62.42 | 50.17 | 47.00 | 52.96 | |||||||||||||
| MIN | 33.19 | 29.21 | 34.97 | 39.20 | 46.23 | 52.00 | 55.23 | 60.68 | 55.17 | 46.35 | 33.83 | 32.35 | 48.49 | |||||||||||||
| NO YRS | 31 | 33 | 35 | 34 | 33 | 29 | 30 | 34 | 33 | 33 | 32 | 32 | 25 | |||||||||||||