YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1988 | 23.81 | b | 31.65 | b | 31.77 | c | 44.79 | b | 51.50 | a | 62.20 | 66.02 | 65.31 | 56.12 | 50.05 | c | 34.42 | 27.78 | b | 45.45 | ||||||
1989 | 28.67 | a | 25.80 | c | 41.83 | b | ----- | z | 55.10 | 58.73 | ----- | z | 63.97 | ----- | z | 46.31 | 40.79 | a | 26.63 | d | 43.09 | c | ||||
1990 | 29.10 | b | 29.75 | 35.83 | e | 42.20 | 49.02 | 65.93 | b | 62.98 | 62.55 | a | 60.31 | a | 47.27 | a | 37.71 | a | 24.40 | b | 45.59 | |||||
1991 | 26.15 | a | 34.89 | 34.75 | a | 41.84 | b | 53.07 | b | 61.40 | 64.53 | 63.87 | a | 55.45 | a | 47.53 | 30.20 | 29.30 | a | 45.25 | ||||||
1992 | 29.21 | 32.25 | c | 36.79 | 48.07 | a | 52.74 | 58.31 | d | 63.34 | b | 62.53 | b | 57.62 | 48.52 | d | 28.78 | a | 27.32 | 45.46 | ||||||
1993 | 29.54 | c | 27.79 | b | 35.57 | c | 40.78 | a | 50.90 | a | 59.43 | 65.43 | a | 61.53 | a | 54.42 | 43.60 | b | 30.90 | a | 30.60 | b | 44.21 | |||
1994 | 28.94 | e | 29.37 | b | 36.74 | 41.41 | b | 52.65 | a | 65.33 | a | 66.13 | 66.50 | 57.84 | a | 46.60 | 34.19 | c | 32.95 | a | 46.55 | |||||
1995 | 29.14 | b | 37.05 | 34.65 | a | 37.57 | b | 46.20 | a | 58.20 | 63.72 | a | 67.55 | 56.84 | b | 49.55 | 41.45 | b | 32.92 | 46.24 | ||||||
1996 | 29.69 | 33.17 | 34.09 | b | 43.73 | 57.35 | a | 61.97 | a | 66.65 | 64.16 | 56.34 | b | 47.11 | 38.43 | 30.29 | 46.92 | |||||||||
1997 | 28.22 | a | 27.25 | b | 39.79 | 36.55 | b | 50.38 | c | 60.89 | b | 65.71 | b | 63.50 | 60.17 | 47.56 | 32.42 | 25.40 | a | 44.82 | ||||||
1998 | 32.08 | a | 29.00 | 33.91 | b | 39.10 | a | 53.65 | a | 60.72 | 63.85 | 62.33 | a | 61.10 | a | 48.19 | 40.35 | 31.13 | 46.29 | |||||||
1999 | 34.35 | a | 35.85 | a | 40.14 | b | 38.62 | d | 47.37 | 58.21 | b | 65.97 | b | 64.11 | 55.60 | 48.71 | 43.91 | a | 29.73 | 46.88 | ||||||
2000 | 33.16 | 36.07 | b | 36.04 | c | 44.59 | a | 54.50 | a | 61.72 | a | 68.89 | 67.71 | 59.65 | 47.95 | c | 28.62 | 29.60 | b | 47.37 | ||||||
2001 | 27.03 | a | 33.00 | a | 34.31 | g | 46.30 | c | 52.28 | b | 62.50 | c | 68.62 | b | 65.02 | b | 59.27 | d | 48.73 | e | 44.08 | f | 28.69 | d | 49.14 | b |
2002 | 29.89 | d | 27.71 | b | 34.07 | a | 48.40 | a | 52.93 | b | 66.76 | c | 69.34 | f | 65.92 | 58.36 | b | 43.55 | c | 34.59 | b | 29.53 | b | 44.70 | a | |
2003 | 36.50 | b | 31.47 | l | 34.41 | d | 45.57 | a | 53.83 | b | 58.67 | o | 70.71 | b | 66.38 | a | 57.12 | n | 52.55 | a | 37.67 | d | 32.31 | d | 47.77 | c |
2004 | 30.95 | c | 26.80 | b | 42.95 | a | 45.67 | o | 54.43 | c | 59.76 | a | 63.62 | a | 61.95 | a | 57.76 | a | 47.21 | 34.48 | b | 30.47 | b | 46.40 | a | |
2005 | 33.97 | 30.04 | a | 34.00 | a | 41.65 | c | 52.89 | c | 60.69 | c | 68.48 | b | 63.50 | 60.38 | e | 48.87 | a | 40.45 | a | 28.81 | 46.98 | ||||
2006 | 31.78 | a | 29.52 | a | 35.82 | a | 47.39 | b | 54.25 | a | 64.47 | 67.70 | c | 62.80 | a | 53.32 | 46.48 | 38.77 | b | 28.05 | a | 46.70 | ||||
2007 | 20.07 | h | 31.70 | c | 41.20 | a | 43.02 | e | 52.17 | b | 60.67 | a | 67.62 | e | 67.32 | 59.66 | b | 49.78 | d | 38.28 | e | 26.31 | e | 48.88 | a | |
2008 | 23.12 | e | 30.31 | 35.02 | 42.85 | 50.15 | 61.59 | a | 67.39 | 63.56 | 57.12 | 49.19 | 39.12 | 28.55 | 45.66 | |||||||||||
2009 | 31.66 | f | 34.95 | 38.55 | 41.37 | 54.35 | 58.08 | 66.15 | 65.05 | 58.58 | k | 42.03 | a | 41.42 | 23.40 | 46.53 | b | |||||||||
2010 | 30.66 | 24.77 | 34.02 | 44.73 | 50.40 | 64.20 | 67.45 | 66.26 | 62.07 | 50.69 | 36.67 | 35.16 | 47.26 | |||||||||||||
2011 | 28.45 | 26.27 | 39.98 | 44.42 | 49.02 | 63.73 | 70.11 | 68.34 | 57.82 | 49.80 | a | 38.47 | 26.61 | 46.92 | ||||||||||||
2012 | 32.77 | a | 27.91 | 41.61 | c | 48.97 | 53.57 | a | 67.12 | 69.10 | 66.58 | 58.30 | 49.56 | 41.72 | 29.87 | 48.92 | ||||||||||
2013 | 27.31 | 26.81 | b | 35.37 | 38.53 | a | 50.89 | 64.67 | 65.81 | 66.31 | 61.80 | 46.25 | a | 37.05 | 27.82 | a | 45.72 | |||||||||
2014 | 29.48 | 31.41 | 35.45 | 42.45 | 50.45 | 61.75 | 66.85 | g | ----- | z | 61.27 | 50.47 | 33.98 | 29.56 | 42.63 | b | ||||||||||
2015 | 30.31 | 32.04 | 37.82 | a | 43.50 | 49.31 | 63.75 | 64.95 | 65.39 | 62.05 | 50.87 | 35.50 | 28.69 | 47.01 | ||||||||||||
2016 | 27.48 | 32.12 | 37.50 | 41.50 | 48.68 | 64.50 | a | 67.65 | 62.16 | 58.57 | 51.26 | 40.65 | 29.53 | a | 46.80 | |||||||||||
2017 | 26.68 | 36.71 | 42.18 | a | 43.47 | 48.63 | 62.60 | 67.08 | 62.17 | a | 58.35 | 48.07 | a | 42.83 | 30.82 | a | 47.47 | |||||||||
2018 | 33.39 | 31.32 | 36.73 | 44.23 | 56.73 | ----- | z | 67.58 | s | ----- | z | 61.72 | 47.31 | 35.02 | ----- | z | 43.30 | d | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.72 | 30.78 | 36.95 | 43.02 | 51.91 | 62.06 | 66.50 | 64.63 | 58.54 | 48.12 | 36.96 | 29.07 | 46.38 | |||||||||||||
S.D. | 3.03 | 3.43 | 2.98 | 3.18 | 2.66 | 2.63 | 2.08 | 1.98 | 2.38 | 2.30 | 4.12 | 2.54 | 1.05 | |||||||||||||
SKEW | 0.02 | 0.19 | 0.55 | -0.05 | -0.09 | 0.16 | 0.10 | 0.16 | -0.26 | -0.67 | -0.41 | 0.00 | 0.08 | |||||||||||||
MAX | 36.50 | 37.05 | 42.95 | 48.97 | 57.35 | 67.12 | 70.71 | 68.34 | 62.07 | 52.55 | 43.91 | 35.16 | 48.92 | |||||||||||||
MIN | 23.12 | 24.77 | 31.77 | 36.55 | 46.20 | 58.08 | 62.98 | 61.53 | 53.32 | 42.03 | 28.62 | 23.40 | 44.21 | |||||||||||||
YRS | 29 | 30 | 30 | 29 | 31 | 29 | 27 | 29 | 28 | 31 | 30 | 30 | 22 |