| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.67 | 53.97 | 45.87 | 38.81 | 48.83 | |||||
| 1992 | 39.94 | 47.83 | 49.00 | 51.47 | 55.58 | 57.27 | 59.03 | 58.58 | 56.87 | 56.03 | 45.77 | 40.52 | 51.49 | |||||||||||||
| 1993 | 39.23 | 43.14 | 50.16 | 49.20 | 54.29 | 58.43 | 57.77 | 59.10 | 55.83 | 54.29 | 42.87 | 39.65 | 50.33 | |||||||||||||
| 1994 | 39.48 | 41.57 | 45.61 | 49.70 | 53.55 | 55.40 | 56.06 | 58.10 | 57.23 | 52.42 | 41.40 | 39.45 | 49.17 | |||||||||||||
| 1995 | 47.71 | 47.07 | 45.74 | 48.60 | 52.39 | 56.33 | 60.29 | 59.13 | 58.07 | 53.32 | 48.50 | 47.06 | 52.02 | |||||||||||||
| 1996 | 43.26 | 47.66 | 47.19 | 50.30 | 54.58 | 56.73 | 58.94 | 58.29 | 55.60 | 52.90 | 47.37 | 46.13 | 51.58 | |||||||||||||
| 1997 | 43.87 | 43.96 | 47.06 | 50.40 | 57.48 | 57.70 | 58.48 | 60.55 | 60.73 | 52.35 | 49.40 | 39.35 | 51.78 | |||||||||||||
| 1998 | 44.90 | 44.64 | 47.06 | 48.20 | 51.00 | 55.43 | ----- | z | 59.71 | 59.23 | 51.06 | 46.60 | 36.39 | 49.48 | ||||||||||||
| 1999 | 40.19 | 42.68 | 44.13 | 47.63 | 50.17 | a | 54.28 | a | 57.94 | 59.35 | 57.07 | a | 53.00 | 48.70 | 38.42 | 49.46 | ||||||||||
| 2000 | 45.23 | 47.11 | a | 46.71 | 50.50 | ----- | z | 57.33 | 56.68 | 58.13 | 57.87 | 52.63 | a | 42.00 | 40.84 | 50.46 | ||||||||||
| 2001 | 37.65 | 42.25 | 47.71 | 46.17 | 55.16 | 57.63 | 57.42 | 57.97 | 55.80 | 53.90 | 47.83 | 44.17 | a | 50.30 | ||||||||||||
| 2002 | 39.74 | 42.00 | 43.19 | 48.53 | 50.90 | 56.13 | 57.71 | 56.58 | 56.33 | 51.68 | 45.57 | 43.58 | 49.33 | |||||||||||||
| 2003 | 45.13 | 42.21 | 47.77 | 46.57 | 52.39 | 56.20 | 58.71 | 59.48 | 58.53 | 53.77 | 44.93 | 43.58 | 50.77 | |||||||||||||
| 2004 | 42.39 | 44.41 | 48.77 | 49.73 | 54.13 | 56.97 | 58.13 | 59.94 | 58.50 | 52.81 | 45.33 | 41.65 | 51.06 | |||||||||||||
| 2005 | 40.87 | 46.29 | 48.35 | 48.20 | 54.71 | 55.77 | 59.06 | 57.55 | 55.00 | 52.23 | 46.47 | 45.00 | 50.79 | |||||||||||||
| 2006 | 42.87 | 43.21 | 43.81 | 49.67 | 53.52 | 58.03 | 60.55 | 57.77 | 54.80 | 51.65 | 47.23 | 39.32 | 50.20 | |||||||||||||
| 2007 | 35.55 | 44.04 | 46.23 | 48.20 | 52.71 | 56.37 | 58.26 | 59.32 | 56.60 | 51.00 | 45.80 | 40.06 | 49.51 | |||||||||||||
| 2008 | 41.29 | 42.55 | 44.94 | 46.13 | 53.29 | 56.80 | 58.42 | 58.68 | 57.07 | c | 53.00 | 47.30 | 39.00 | 49.87 | ||||||||||||
| 2009 | 39.26 | 43.07 | 45.06 | 47.67 | 53.81 | 56.43 | b | 56.03 | 57.97 | a | 58.70 | 51.16 | 42.47 | 40.19 | 49.32 | |||||||||||
| 2010 | 43.94 | 46.54 | 45.10 | 46.47 | 49.94 | 56.53 | 56.16 | 55.84 | 58.20 | 53.16 | 45.27 | 45.52 | 50.22 | |||||||||||||
| 2011 | 40.19 | 39.54 | 46.87 | 48.97 | 50.06 | 55.32 | b | 57.94 | 57.00 | a | 58.30 | 53.80 | a | 44.80 | 38.17 | a | 49.25 | |||||||||
| 2012 | 39.55 | 42.36 | a | 44.84 | 49.17 | 52.32 | 56.64 | b | 56.80 | a | 57.58 | 54.70 | 53.29 | 45.73 | 41.48 | 49.54 | ||||||||||
| 2013 | 33.87 | 37.57 | 44.58 | 53.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.00 | z | 38.67 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.19 | 43.71 | 46.36 | 48.64 | 53.10 | 56.56 | 58.02 | 58.41 | 57.17 | 52.88 | 45.78 | 41.29 | 50.32 | |||||||||||||
| S.D. | 3.30 | 2.62 | 1.83 | 1.51 | 2.01 | 1.00 | 1.27 | 1.16 | 1.55 | 1.20 | 2.14 | 2.91 | 0.93 | |||||||||||||
| SKEW | -0.18 | -0.23 | 0.20 | -0.12 | 0.08 | -0.27 | 0.10 | -0.22 | 0.19 | 0.47 | -0.44 | 0.50 | 0.57 | |||||||||||||
| MAX | 47.71 | 47.83 | 50.16 | 51.47 | 57.48 | 58.43 | 60.55 | 60.55 | 60.73 | 56.03 | 49.40 | 47.06 | 52.02 | |||||||||||||
| MIN | 33.87 | 37.57 | 43.19 | 46.13 | 49.94 | 54.28 | 56.03 | 55.84 | 54.70 | 51.00 | 41.40 | 36.39 | 49.17 | |||||||||||||
| NO YRS | 22 | 22 | 22 | 21 | 20 | 21 | 20 | 21 | 22 | 22 | 22 | 22 | 19 | |||||||||||||