YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1980 | ----- | z | ----- | z | 47.35 | g | 53.33 | 62.61 | c | 76.79 | b | 78.58 | g | 72.83 | g | 66.97 | a | 54.03 | a | 44.08 | d | 45.32 | c | 57.59 | e | |
1981 | 40.62 | a | 44.79 | 48.04 | f | 59.87 | d | 64.03 | a | 74.21 | b | 75.43 | b | 70.88 | b | 65.34 | e | 56.87 | d | 49.74 | c | 45.41 | i | 60.18 | b | |
1982 | 41.37 | d | 40.38 | b | 49.77 | e | 55.68 | h | 63.10 | 71.77 | 75.63 | e | 73.94 | g | 67.36 | b | 55.43 | c | 45.88 | d | 37.15 | d | 54.78 | b | ||
1983 | 39.11 | c | 43.13 | a | 48.34 | b | 50.91 | g | 59.93 | c | 70.26 | c | 74.13 | h | 74.62 | j | 70.40 | f | 58.71 | b | 51.45 | i | 39.31 | e | 51.25 | e |
1984 | 38.22 | f | 42.07 | g | 47.64 | c | 54.02 | e | 67.00 | a | 71.42 | d | 74.02 | c | 70.22 | b | 63.00 | g | 53.06 | d | 48.50 | j | 40.83 | j | 62.48 | e |
1985 | 36.83 | d | 40.42 | b | 49.21 | b | 57.58 | 64.27 | 71.63 | 74.10 | b | 74.09 | c | 65.72 | c | 57.67 | b | 49.55 | b | 40.30 | a | 56.78 | ||||
1986 | 43.18 | 44.22 | c | 51.42 | 59.03 | 63.80 | a | 68.48 | b | 72.27 | 72.61 | 65.78 | 55.64 | b | 44.81 | a | 38.40 | a | 56.64 | |||||||
1987 | 37.57 | a | 40.48 | b | 45.26 | 52.75 | 61.05 | b | 68.95 | 72.83 | b | 71.97 | a | 65.27 | 59.91 | c | 45.48 | 38.60 | 55.01 | |||||||
1988 | 38.17 | a | 44.11 | a | 47.47 | 54.92 | 62.20 | c | 70.83 | a | 72.14 | c | 71.23 | a | 65.00 | a | 59.93 | a | 49.75 | d | 38.81 | d | 56.21 | |||
1989 | 40.90 | 41.46 | a | 52.47 | 60.08 | 66.98 | a | 71.88 | a | 75.17 | e | 72.43 | b | 65.89 | c | 57.43 | b | 48.41 | a | 37.53 | 57.55 | |||||
1990 | 39.71 | 41.77 | 48.65 | 57.10 | a | 63.91 | b | 78.10 | 73.06 | 69.19 | d | 66.54 | b | 57.50 | a | 50.02 | b | 40.09 | d | 57.14 | ||||||
1991 | 38.50 | c | 44.96 | 49.38 | c | 58.06 | d | 64.58 | 71.35 | c | 71.37 | d | 70.87 | 63.64 | a | 57.42 | a | 44.45 | 38.61 | c | 56.10 | |||||
1992 | 37.03 | 42.97 | 48.55 | a | 57.25 | 61.28 | a | 68.69 | a | 73.43 | a | 72.00 | e | 68.06 | c | 59.93 | b | 43.48 | b | 39.29 | e | 56.00 | ||||
1993 | 42.31 | b | 42.61 | a | 49.08 | a | 56.83 | a | 63.43 | b | 71.67 | c | 75.55 | c | 71.63 | a | 66.09 | a | 56.55 | b | 44.83 | 41.71 | e | 56.86 | ||
1994 | 40.37 | a | 42.48 | a | 49.14 | b | 55.81 | a | 63.43 | a | 75.69 | c | 77.00 | b | 74.77 | a | 68.02 | d | 58.08 | a | 49.27 | b | 45.46 | f | 59.46 | a |
1995 | 43.15 | 51.04 | e | 52.02 | b | 53.14 | p | 65.48 | b | 70.75 | f | 74.75 | a | 75.39 | 66.79 | a | 58.90 | a | 51.46 | c | 41.41 | c | 58.04 | b | ||
1996 | 41.69 | d | 47.84 | 46.52 | c | 58.16 | a | 71.95 | c | 74.88 | d | 73.68 | a | 72.22 | b | 65.06 | c | 57.30 | c | 48.86 | b | 42.67 | d | 58.40 | ||
1997 | 38.26 | 39.07 | 50.98 | c | 51.83 | 63.33 | a | 70.08 | 74.68 | c | 72.64 | b | 69.31 | c | 56.64 | b | 44.31 | c | 34.90 | b | 55.50 | |||||
1998 | 43.38 | a | 42.10 | b | 46.85 | a | 52.48 | b | 66.45 | a | 73.61 | b | 76.53 | a | 71.69 | b | 69.26 | a | 57.54 | c | 50.50 | b | 40.98 | c | 57.61 | |
1999 | 45.14 | c | 46.54 | c | 49.77 | a | 55.28 | a | 63.71 | b | 70.46 | b | 73.20 | c | 72.91 | c | 66.37 | c | 57.87 | d | 51.13 | c | 38.25 | a | 57.55 | |
2000 | 43.88 | b | 48.48 | a | 50.07 | a | 59.45 | b | 69.60 | e | 72.37 | 75.74 | d | 74.32 | i | 70.20 | b | 57.65 | d | 41.48 | b | 38.95 | a | 57.08 | a | |
2001 | 37.36 | b | 44.50 | 47.93 | a | 58.83 | a | 66.53 | a | 74.43 | c | 76.86 | b | 72.84 | c | 68.71 | f | 60.47 | a | 50.07 | b | 39.60 | e | 57.22 | a | |
2002 | 43.02 | a | 42.90 | c | 47.96 | d | 61.30 | e | 65.96 | d | 75.58 | d | 74.67 | b | 75.96 | g | 68.06 | c | 55.75 | e | 45.76 | c | 40.91 | d | 56.53 | a |
2003 | 45.57 | d | 44.35 | a | 50.38 | b | 57.96 | b | 67.08 | e | 69.81 | l | 77.56 | g | 73.08 | y | 69.59 | b | 63.02 | c | 49.74 | c | 42.58 | a | 54.48 | c |
2004 | 42.71 | b | 41.62 | l | 52.04 | h | 55.72 | c | 66.84 | b | 72.21 | b | 73.61 | c | 69.46 | f | 64.38 | 57.29 | b | 44.77 | 41.02 | 57.62 | c | |||
2005 | 44.87 | 44.34 | 47.61 | 55.07 | 63.40 | 70.67 | 73.60 | 70.02 | 67.48 | 56.95 | 49.33 | 42.06 | 57.12 | |||||||||||||
2006 | 44.08 | 45.29 | 54.93 | x | 60.17 | 67.50 | m | 73.22 | a | 74.41 | n | ----- | z | ----- | z | 56.88 | g | 48.93 | 40.74 | b | 52.07 | f | ||||
2007 | 35.85 | 45.23 | 51.12 | f | 53.87 | 60.67 | a | 68.96 | g | 73.29 | s | 72.82 | f | 68.60 | t | ----- | z | ----- | z | ----- | z | 48.91 | h | |||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.47 | 44.47 | k | |
2009 | 45.82 | 48.71 | 52.94 | 57.45 | 67.83 | a | 72.70 | 76.16 | 74.63 | 67.08 | 58.50 | 51.28 | 38.06 | 59.26 | ||||||||||||
2010 | 40.03 | 40.79 | 49.19 | 57.60 | 63.98 | 75.75 | 73.89 | 74.37 | 70.50 | 60.76 | 48.38 | 47.37 | 58.55 | |||||||||||||
2011 | 42.34 | 41.30 | 54.97 | 62.10 | 64.00 | 75.95 | 78.06 | 80.16 | 70.67 | 59.79 | 49.68 | 36.38 | a | 59.62 | ||||||||||||
2012 | 45.29 | 42.81 | 54.16 | 61.78 | 66.73 | 76.17 | 75.52 | 75.90 | 68.57 | 59.45 | 52.85 | 42.89 | 60.18 | |||||||||||||
2013 | 39.65 | 43.88 | 52.77 | 57.60 | 65.43 | a | 77.83 | a | 73.63 | 74.15 | 68.13 | 57.08 | 47.38 | 40.45 | 58.16 | |||||||||||
2014 | 43.97 | a | 47.36 | 51.39 | 57.33 | a | 63.39 | 75.18 | 75.29 | 73.34 | 67.45 | 60.53 | 47.65 | 44.69 | 58.96 | |||||||||||
2015 | 39.37 | 45.88 | 52.02 | 55.93 | 62.08 | 72.33 | 76.15 | 76.77 | 72.68 | 60.27 | 49.41 | a | 42.18 | 58.76 | ||||||||||||
2016 | 40.42 | 47.67 | 53.23 | 56.53 | 62.27 | 74.20 | 79.44 | 72.13 | 67.70 | 63.84 | 51.35 | 44.18 | 59.41 | |||||||||||||
2017 | 43.05 | 50.86 | 56.45 | 59.18 | 64.18 | 74.38 | 76.12 | a | 72.10 | 67.95 | 59.73 | 55.05 | 45.69 | 60.39 | ||||||||||||
2018 | 41.66 | 46.59 | 51.53 | 58.47 | 69.95 | 76.27 | 76.58 | 75.10 | 67.93 | 57.87 | 46.57 | 41.35 | 59.16 | |||||||||||||
2019 | 43.21 | 44.55 | 49.42 | 59.42 | q | 63.71 | 72.72 | ----- | z | 77.89 | l | ----- | z | ----- | z | ----- | z | ----- | z | 54.72 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.34 | 44.33 | 50.13 | 57.16 | 64.64 | 73.13 | 74.85 | 73.04 | 67.42 | 58.20 | 48.16 | 40.77 | 57.79 | |||||||||||||
S.D. | 2.74 | 2.93 | 2.54 | 2.61 | 2.61 | 2.57 | 1.77 | 2.28 | 1.99 | 2.21 | 3.00 | 2.80 | 1.50 | |||||||||||||
SKEW | -0.20 | 0.46 | 0.47 | -0.17 | 0.70 | 0.07 | 0.32 | 1.00 | 0.45 | 0.23 | -0.15 | 0.30 | -0.02 | |||||||||||||
MAX | 45.82 | 51.04 | 56.45 | 62.10 | 71.95 | 78.10 | 79.44 | 80.16 | 72.68 | 63.84 | 55.05 | 47.37 | 60.39 | |||||||||||||
MIN | 35.85 | 39.07 | 45.26 | 51.83 | 59.93 | 68.48 | 71.37 | 69.19 | 63.64 | 53.06 | 41.48 | 34.90 | 55.01 | |||||||||||||
YRS | 37 | 36 | 34 | 35 | 38 | 36 | 33 | 29 | 33 | 36 | 35 | 35 | 24 |