| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1990 | ----- | z | ----- | z | 29.00 | 41.47 | 42.32 | 50.50 | 61.00 | 56.97 | 48.40 | 33.26 | 27.17 | 14.55 | k | 43.34 | ||||||||||
| 1991 | 13.44 | m | 27.00 | 25.47 | l | 33.03 | 41.42 | 45.97 | 54.32 | 53.87 | 43.83 | l | 33.26 | 25.85 | j | 19.55 | i | 41.27 | ||||||||
| 1992 | 22.23 | 27.95 | i | 29.87 | 36.60 | 44.32 | 53.17 | 53.10 | 50.71 | 41.63 | 33.58 | 27.25 | j | 19.75 | o | 40.58 | ||||||||||
| 1993 | 15.76 | n | 19.96 | 30.61 | 36.53 | 45.68 | 46.70 | 48.84 | 48.29 | 40.07 | ----- | z | 15.23 | 23.05 | i | 36.88 | ||||||||||
| 1994 | 26.14 | j | 20.82 | 28.68 | ----- | z | 45.00 | 48.57 | 55.52 | 52.74 | 43.13 | 33.35 | 22.48 | i | 17.82 | i | 40.98 | |||||||||
| 1995 | 24.67 | j | 27.36 | 29.68 | i | 33.48 | a | 43.00 | 50.36 | p | 54.29 | 46.65 | 42.80 | 30.35 | k | 30.14 | b | 20.71 | n | 39.67 | ||||||
| 1996 | 24.29 | j | 21.50 | k | 30.35 | 34.10 | 41.90 | 47.67 | i | 49.65 | k | 48.33 | j | 39.30 | 32.16 | 27.30 | j | 24.05 | k | 35.56 | ||||||
| 1997 | 19.32 | i | 23.00 | 27.48 | 32.67 | 42.32 | 47.87 | 50.43 | j | 48.77 | i | 44.67 | i | 30.06 | 26.67 | l | 21.26 | l | 33.90 | |||||||
| 1998 | 27.00 | l | 28.07 | 28.55 | 34.43 | 44.63 | l | 45.80 | 56.68 | i | 49.00 | j | 43.70 | 26.61 | 23.68 | k | 14.71 | j | 34.53 | |||||||
| 1999 | 19.30 | k | 20.68 | i | 22.32 | f | 26.71 | f | 35.68 | f | 43.78 | g | 46.48 | f | 46.45 | i | 31.41 | h | 22.53 | n | 21.50 | t | ----- | z | 9999.00 | |
| 2000 | 17.07 | q | 20.05 | i | 27.78 | h | 37.09 | g | 44.91 | h | 48.88 | f | 54.42 | g | 50.24 | f | 38.32 | k | 31.39 | h | 20.25 | j | 20.83 | m | 9999.00 | |
| 2001 | 15.00 | k | 16.30 | h | 26.87 | a | 30.71 | i | 39.50 | i | 45.23 | h | 51.73 | i | 49.83 | g | 39.43 | i | 27.11 | d | 28.14 | h | 23.59 | n | 26.99 | |
| 2002 | 22.43 | j | 16.33 | j | 24.87 | 33.80 | 43.46 | e | 52.00 | e | 55.68 | i | 48.53 | l | 38.67 | i | 31.68 | f | 19.25 | j | 24.50 | k | 38.53 | |||
| 2003 | 27.86 | j | 22.52 | g | 30.10 | k | 36.32 | e | 40.18 | i | 53.17 | g | 61.42 | g | 55.14 | i | 41.24 | i | 34.76 | f | 19.14 | i | 23.00 | l | 36.32 | |
| 2004 | 18.37 | l | 23.65 | i | 28.43 | h | 34.41 | h | 42.10 | k | 48.50 | h | 53.65 | k | 52.21 | l | 40.95 | j | 32.75 | k | 24.21 | k | 19.22 | m | 9999.00 | |
| 2005 | 19.06 | m | 14.42 | i | 27.30 | h | 33.70 | g | 44.00 | i | 45.67 | i | 52.84 | l | 49.91 | i | 35.36 | p | 30.10 | j | 21.00 | j | 13.47 | n | 9999.00 | |
| 2006 | 23.26 | l | 15.50 | j | 26.65 | h | 31.15 | j | 38.24 | j | 47.71 | i | 52.83 | m | 44.55 | k | 34.08 | q | 27.55 | k | 25.35 | m | 12.00 | r | 9999.00 | |
| 2007 | 12.23 | i | 24.00 | i | 26.90 | j | 30.90 | i | 43.90 | k | 51.31 | q | 62.00 | n | 51.59 | i | 41.67 | r | 33.91 | i | 24.18 | m | 23.88 | o | 9999.00 | |
| 2008 | 17.41 | n | 22.71 | o | 25.82 | i | 26.83 | g | 42.48 | j | 48.35 | m | 55.33 | m | 53.05 | l | 40.29 | m | 32.57 | j | 29.82 | m | 18.65 | k | 9999.00 | |
| 2009 | 22.58 | l | 23.46 | d | 25.85 | d | 33.37 | 41.26 | l | 54.63 | 53.19 | 54.65 | 45.20 | 33.35 | 25.20 | 16.10 | 36.50 | |||||||||
| 2010 | 28.29 | 29.25 | 30.52 | 33.90 | 41.77 | 51.53 | 54.61 | 53.26 | 43.83 | 39.65 | 27.57 | 23.71 | 38.16 | |||||||||||||
| 2011 | 21.03 | 24.39 | 33.35 | 33.43 | 40.52 | 48.53 | 54.42 | 55.26 | 47.40 | 38.23 | 27.87 | 14.77 | 36.60 | |||||||||||||
| 2012 | 22.23 | 24.66 | 32.26 | 37.10 | 43.45 | 49.93 | a | 60.16 | 54.48 | 44.40 | 32.74 | 30.63 | 26.74 | 38.23 | ||||||||||||
| 2013 | 6.94 | 26.43 | 28.94 | 35.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.77 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 20.14 | 24.95 | 29.09 | 35.02 | 42.93 | 49.60 | 54.95 | 52.69 | 43.62 | 32.78 | 26.26 | 20.33 | 37.66 | |||||||||||||
| S.D. | 7.91 | 2.98 | 2.34 | 2.38 | 1.52 | 2.86 | 3.48 | 3.22 | 2.76 | 3.77 | 5.20 | 5.81 | 0.92 | |||||||||||||
| SKEW | -0.98 | -0.27 | -0.03 | 1.49 | 0.32 | 0.25 | 0.34 | -0.71 | 0.16 | 0.09 | -1.53 | 0.11 | -0.68 | |||||||||||||
| MAX | 28.29 | 29.25 | 33.35 | 41.47 | 45.68 | 54.63 | 61.00 | 56.97 | 48.40 | 39.65 | 30.63 | 26.74 | 38.23 | |||||||||||||
| MIN | 6.94 | 19.96 | 24.87 | 32.67 | 40.52 | 45.80 | 48.84 | 46.65 | 39.30 | 26.61 | 15.23 | 14.77 | 36.60 | |||||||||||||
| NO YRS | 5 | 11 | 14 | 14 | 12 | 12 | 10 | 10 | 11 | 12 | 7 | 4 | 3 | |||||||||||||