| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1988 | ----- | z | ----- | z | ----- | z | 31.81 | i | 28.00 | a | 39.00 | a | 41.97 | a | 37.38 | b | 31.37 | 26.23 | a | 27.40 | 14.65 | 30.75 | ||||
| 1989 | 6.31 | b | 5.57 | 29.67 | a | 31.44 | c | 30.65 | k | 38.04 | e | 39.44 | m | 38.00 | 32.07 | 26.03 | 18.18 | b | 14.19 | 23.95 | ||||||
| 1990 | 19.93 | a | 13.26 | e | 23.63 | d | 31.54 | f | 25.71 | n | 39.08 | r | 42.10 | ----- | z | 33.04 | e | 25.72 | m | 19.90 | 5.67 | a | 22.50 | |||
| 1991 | 14.17 | b | 23.38 | d | 24.27 | a | 27.00 | 30.13 | 35.14 | a | 43.68 | 41.85 | d | 32.04 | e | 27.19 | o | 26.68 | b | 19.68 | 28.91 | |||||
| 1992 | 21.10 | a | 25.75 | a | 23.13 | 29.61 | b | ----- | z | 41.19 | c | 42.87 | a | 40.33 | a | 33.08 | r | 26.88 | g | 22.90 | 14.33 | a | 29.02 | |||
| 1993 | 10.62 | b | 17.86 | 29.61 | 30.40 | 35.42 | 38.30 | 35.73 | a | 37.71 | 32.83 | 29.68 | 12.40 | 18.71 | 27.44 | |||||||||||
| 1994 | 20.16 | 21.21 | 23.16 | 26.83 | 35.84 | 35.50 | 44.77 | 36.29 | 33.50 | 23.90 | 16.63 | 16.90 | 27.89 | |||||||||||||
| 1995 | 27.68 | 22.89 | 27.03 | 28.33 | 36.42 | 40.37 | 41.81 | 36.52 | 35.82 | s | 24.00 | g | 29.63 | 24.03 | 31.47 | |||||||||||
| 1996 | 23.13 | 24.24 | 25.97 | 28.93 | 31.65 | k | 37.65 | j | 44.50 | z | ----- | z | ----- | z | 34.80 | z | 25.13 | 25.26 | l | 25.48 | ||||||
| 1997 | 22.10 | 22.50 | n | 25.78 | d | 26.41 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.94 | ||
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.41 | m | 14.03 | b | 14.03 | |
| 2013 | 16.12 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.00 | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 18.36 | 19.27 | 25.80 | 28.94 | 33.16 | 38.22 | 41.85 | 38.30 | 32.47 | 26.46 | 22.10 | 15.80 | 27.67 | |||||||||||||
| S.D. | 6.70 | 6.83 | 2.55 | 1.70 | 3.83 | 2.27 | 2.90 | 2.05 | 0.79 | 2.39 | 5.70 | 5.05 | 0.32 | |||||||||||||
| SKEW | -0.56 | -1.09 | 0.50 | 0.09 | -0.50 | -0.20 | -1.45 | 0.81 | -0.08 | 0.46 | -0.32 | -0.42 | -0.67 | |||||||||||||
| MAX | 27.68 | 25.75 | 29.67 | 31.44 | 36.42 | 41.19 | 44.77 | 41.85 | 33.50 | 29.68 | 29.63 | 24.03 | 27.89 | |||||||||||||
| MIN | 6.31 | 5.57 | 23.13 | 26.83 | 28.00 | 35.14 | 35.73 | 36.29 | 31.37 | 23.90 | 12.40 | 5.67 | 27.44 | |||||||||||||
| NO YRS | 9 | 8 | 9 | 7 | 5 | 7 | 7 | 7 | 6 | 4 | 9 | 9 | 2 | |||||||||||||