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 | b | ||||||||||
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 | 38.67 | a | 50.66 | ||||||||||||
1982 | 35.68 | 36.59 | a | 38.58 | 40.50 | 51.07 | d | 61.78 | c | 63.34 | b | 66.13 | 59.17 | a | 51.29 | 39.59 | a | 38.55 | 48.52 | |||||||
1983 | 42.71 | 40.25 | 41.13 | 45.80 | 56.10 | a | 53.13 | 58.65 | 64.74 | 57.83 | 53.97 | 40.67 | 32.71 | 48.97 | ||||||||||||
1984 | 44.19 | 41.07 | 43.00 | 41.33 | 49.23 | 54.66 | a | 67.06 | 66.55 | 58.54 | b | 46.35 | 40.76 | a | 34.81 | 48.96 | ||||||||||
1985 | 45.32 | 37.19 | a | 39.87 | a | 48.13 | 52.29 | 60.93 | a | 73.27 | a | 65.42 | 55.83 | 51.48 | 33.83 | 44.61 | c | 50.68 | ||||||||
1986 | 42.57 | a | 39.43 | 46.81 | 43.70 | 50.84 | 62.43 | b | 59.27 | a | 72.74 | 55.17 | 56.65 | 45.55 | a | 42.16 | 51.44 | |||||||||
1987 | 37.45 | 40.61 | 41.48 | b | 52.86 | b | 55.30 | a | 62.45 | a | 61.57 | c | 67.54 | c | 65.75 | b | 62.90 | a | 45.10 | a | 38.90 | a | 52.66 | |||
1988 | 37.72 | b | 45.10 | 41.13 | 45.27 | 49.57 | a | 56.23 | 66.62 | b | 64.94 | 62.07 | 60.35 | 41.13 | 41.10 | 50.94 | ||||||||||
1989 | 37.58 | 29.19 | a | 36.97 | 52.00 | 50.65 | 60.90 | 58.52 | 60.68 | 64.07 | 50.06 | 46.93 | 47.00 | 49.54 | ||||||||||||
1990 | 42.45 | 36.11 | 43.58 | 50.47 | 48.16 | 54.37 | 67.81 | 65.77 | 64.33 | 49.20 | a | 41.87 | 32.47 | a | 49.72 | |||||||||||
1991 | ----- | z | 47.59 | a | 36.68 | 43.17 | 46.23 | 52.31 | a | 65.94 | 66.43 | a | 65.60 | 57.45 | 44.07 | 41.71 | 51.56 | a | ||||||||
1992 | 41.61 | 46.38 | 49.50 | a | 47.47 | 60.58 | 62.57 | 65.23 | 70.71 | 59.00 | 53.55 | 44.00 | a | 34.58 | 52.93 | |||||||||||
1993 | 33.13 | a | 36.46 | 43.55 | 41.69 | a | 54.55 | 53.90 | 55.40 | a | 63.42 | 65.17 | 56.97 | 42.23 | 41.06 | 48.96 | ||||||||||
1994 | 44.16 | 37.54 | 44.45 | 47.21 | a | 53.55 | 54.30 | 68.61 | 63.13 | 63.66 | a | 50.00 | 34.70 | 35.67 | a | 49.75 | ||||||||||
1995 | 39.71 | 45.61 | 39.68 | 42.80 | 55.00 | c | 58.22 | c | 66.39 | 62.58 | 64.20 | 51.77 | 48.24 | a | 42.65 | 51.40 | ||||||||||
1996 | 40.06 | 44.55 | 44.77 | a | 46.83 | 48.52 | 57.90 | 70.52 | 68.68 | 58.23 | 51.26 | 46.33 | 39.48 | 51.43 | ||||||||||||
1997 | 38.94 | 40.04 | 40.14 | b | 43.86 | a | 57.55 | 56.73 | 65.29 | 68.26 | 63.97 | a | 52.17 | a | 46.21 | a | 42.74 | 51.32 | ||||||||
1998 | 39.94 | 38.29 | 42.97 | 47.37 | 49.33 | a | 60.00 | 70.06 | 68.90 | 66.23 | 52.06 | 39.97 | 36.29 | 50.95 | ||||||||||||
1999 | 39.45 | 34.54 | 35.52 | 42.73 | 46.94 | 54.30 | 63.90 | 65.68 | 64.20 | 55.13 | 45.50 | 46.32 | 49.52 | |||||||||||||
2000 | 37.00 | 42.79 | 41.94 | 52.77 | 51.87 | 62.30 | 65.07 | a | 70.33 | m | 64.61 | l | 52.89 | m | 43.94 | l | 45.28 | m | 50.53 | e | ||||||
2001 | 40.86 | b | 38.60 | c | 45.42 | g | 43.04 | f | 60.29 | g | 58.84 | e | 68.00 | g | 68.32 | c | 65.73 | 53.81 | 44.50 | 37.42 | 51.01 | d | ||||
2002 | 35.79 | c | 39.62 | g | 39.04 | f | 46.89 | c | 51.74 | d | 63.92 | f | 72.67 | j | 71.09 | h | 67.41 | a | 56.26 | 50.56 | c | 39.17 | m | 51.44 | f | |
2003 | 48.13 | 41.76 | c | 40.38 | e | 40.38 | d | 53.81 | d | 67.77 | h | 72.12 | e | 71.61 | c | 66.12 | d | 55.80 | a | 37.97 | 40.05 | k | 52.81 | b | ||
2004 | 39.83 | b | 39.37 | b | 48.27 | a | 51.39 | b | 55.18 | n | 60.64 | b | 71.55 | 70.10 | a | 59.67 | 54.45 | 46.83 | a | 42.73 | e | 53.17 | a | |||
2005 | 40.83 | g | 46.60 | c | 45.33 | a | 45.17 | a | 53.48 | 56.58 | f | 67.84 | f | 72.89 | c | 63.14 | b | 51.20 | a | 44.20 | e | 42.31 | b | 51.59 | c | |
2006 | 40.07 | c | 41.95 | f | 34.71 | c | 46.65 | d | 56.46 | c | 60.70 | g | 72.82 | n | 71.23 | e | 67.17 | a | 55.25 | c | 41.67 | f | 42.04 | e | 51.70 | d |
2007 | 40.17 | g | 40.64 | c | 45.31 | b | 45.43 | 55.18 | c | 59.29 | i | 65.67 | m | 66.62 | b | 64.72 | l | 53.62 | o | 45.52 | a | 34.93 | a | 47.66 | e | |
2008 | 33.88 | w | ----- | z | 39.00 | s | 35.31 | q | 52.23 | r | 56.33 | r | 72.30 | k | 67.18 | c | 66.50 | 54.26 | 47.87 | 36.87 | 54.53 | g | ||||
2009 | 47.29 | 40.96 | 36.52 | 45.60 | 56.71 | 60.67 | 74.45 | 68.58 | 66.47 | 50.55 | 41.80 | 38.10 | a | 52.31 | ||||||||||||
2010 | 41.35 | 42.21 | 42.23 | 42.33 | 47.81 | 54.50 | b | 70.39 | 70.16 | 59.07 | 53.61 | 40.20 | 36.39 | 50.02 | ||||||||||||
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 | 42.94 | 47.57 | 54.81 | 60.63 | 74.23 | 68.61 | 61.97 | 56.33 | g | 47.47 | 40.87 | 52.50 | a | |||||||||||
2014 | 50.68 | 38.21 | 45.10 | 48.03 | 58.00 | 59.93 | 74.45 | 74.23 | 68.17 | 56.35 | 44.31 | a | 40.45 | 54.83 | ||||||||||||
2015 | 48.77 | 46.93 | 50.48 | 46.93 | 58.19 | 70.43 | 73.45 | 73.00 | 61.30 | 58.71 | 42.60 | 36.68 | 55.62 | |||||||||||||
2016 | 38.10 | 43.59 | 41.26 | 55.63 | 57.32 | 63.00 | 65.13 | 72.74 | 61.57 | 47.90 | 44.23 | 33.52 | 52.00 | |||||||||||||
2017 | 35.58 | 37.04 | 38.84 | 41.60 | 56.42 | ----- | z | 72.58 | g | 77.54 | c | ----- | z | ----- | z | ----- | z | ----- | z | 47.84 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.81 | 40.25 | 41.80 | 45.87 | 52.72 | 58.37 | 66.71 | 68.20 | 62.87 | 53.75 | 43.38 | 39.28 | 50.92 | |||||||||||||
S.D. | 4.11 | 4.06 | 3.96 | 3.82 | 3.70 | 4.13 | 4.86 | 3.67 | 3.82 | 3.47 | 3.54 | 4.03 | 1.71 | |||||||||||||
SKEW | 0.54 | -0.17 | 0.16 | 0.53 | 0.05 | 0.50 | -0.23 | 0.28 | -0.35 | 0.31 | -0.67 | 0.04 | 1.03 | |||||||||||||
MAX | 50.68 | 47.59 | 50.48 | 55.63 | 60.58 | 70.43 | 74.45 | 77.54 | 69.30 | 62.90 | 50.56 | 47.00 | 55.62 | |||||||||||||
MIN | 33.13 | 29.19 | 34.71 | 39.20 | 46.23 | 52.00 | 55.40 | 60.68 | 55.17 | 46.35 | 33.83 | 32.47 | 48.52 | |||||||||||||
YRS | 35 | 36 | 37 | 38 | 37 | 33 | 33 | 38 | 37 | 36 | 37 | 36 | 27 |