YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | 71.48 | 94.30 | 97.80 | a | 94.93 | a | 85.26 | c | 79.74 | 67.07 | a | 58.71 | 81.16 | d | ||||
1978 | 51.16 | 56.81 | a | 63.81 | 66.60 | 78.65 | e | 92.03 | a | 97.37 | a | 95.32 | c | 85.36 | b | 81.14 | b | 59.37 | ----- | z | 75.24 | a | ||||
1979 | 44.48 | 52.93 | 60.42 | 70.50 | 80.97 | 91.57 | 97.57 | a | 91.03 | 93.13 | 79.94 | 60.83 | 58.00 | 73.45 | ||||||||||||
1980 | 54.77 | 58.21 | 58.71 | 76.59 | h | 75.84 | 91.00 | a | 97.23 | 97.83 | h | 88.63 | k | 78.42 | 66.20 | 62.72 | b | 71.46 | c | |||||||
1981 | 58.84 | 59.21 | 60.26 | 75.17 | 80.42 | 96.17 | 99.67 | a | 98.10 | 88.87 | 71.55 | 65.90 | 58.37 | a | 76.04 | |||||||||||
1982 | 51.65 | 57.25 | 59.42 | 69.00 | 80.61 | 89.00 | a | 94.53 | a | 93.17 | b | 85.28 | a | 72.20 | a | 57.68 | b | 51.52 | 71.78 | |||||||
1983 | 54.90 | 55.74 | a | 59.90 | a | 63.17 | 79.45 | 89.90 | 95.42 | 89.10 | 88.52 | a | 74.74 | 61.70 | 54.26 | 72.23 | ||||||||||
1984 | 55.86 | b | 58.52 | 65.81 | 69.70 | 88.35 | 90.60 | 95.16 | 90.03 | 89.00 | 70.58 | 60.53 | 48.71 | 73.57 | ||||||||||||
1985 | 52.48 | b | 54.82 | ----- | z | 77.20 | 83.77 | 95.97 | 98.74 | 97.70 | a | 82.50 | 75.90 | 58.60 | 56.67 | a | 75.85 | a | ||||||||
1986 | 61.57 | a | 60.54 | 68.46 | c | 72.69 | a | 84.55 | 96.17 | 95.03 | 98.71 | 82.00 | 73.35 | ----- | z | 53.84 | 76.99 | a | ||||||||
1987 | 50.27 | a | 56.54 | 60.93 | b | 76.79 | b | 80.67 | a | 93.30 | 93.39 | 94.77 | a | 89.73 | 80.52 | 59.20 | 47.33 | a | 73.62 | |||||||
1988 | 50.93 | a | 60.55 | 65.00 | a | 70.53 | 81.14 | b | 91.27 | 99.23 | 93.50 | a | 87.27 | 84.06 | 62.33 | 52.32 | 74.84 | |||||||||
1989 | 49.71 | 55.32 | 67.80 | a | 79.77 | 81.41 | b | 90.83 | 100.03 | 93.87 | 88.03 | 75.58 | 67.47 | 58.84 | 75.72 | |||||||||||
1990 | 51.77 | 54.43 | 67.52 | 75.11 | b | 78.33 | a | 90.69 | d | 96.81 | 92.41 | b | 88.41 | a | 78.39 | c | 63.67 | 51.75 | c | 74.11 | ||||||
1991 | 51.96 | c | 64.96 | 54.59 | b | 69.13 | 76.20 | a | 87.83 | 96.00 | a | 93.76 | b | 87.72 | a | 79.61 | 61.23 | 53.50 | a | 73.04 | ||||||
1992 | 51.77 | a | 57.38 | 59.52 | 75.37 | 82.97 | 88.13 | 93.16 | 95.68 | 89.53 | 78.35 | 58.43 | 46.58 | 73.07 | ||||||||||||
1993 | 48.97 | a | 52.21 | 64.74 | 72.00 | 82.27 | a | 87.17 | 94.03 | 94.17 | a | 88.47 | 75.45 | 58.80 | 52.81 | 72.59 | ||||||||||
1994 | 56.87 | a | 51.57 | 69.03 | 71.97 | 79.74 | 94.18 | b | 98.77 | a | 98.13 | 88.23 | 72.71 | 52.83 | 53.23 | a | 73.94 | |||||||||
1995 | 48.28 | b | 64.79 | 60.06 | 67.63 | 74.26 | 84.83 | ----- | z | 95.39 | 90.07 | 77.81 | 70.27 | 57.13 | a | 71.86 | a | |||||||||
1996 | 57.65 | 63.10 | 66.23 | 73.63 | 82.43 | a | 93.53 | 99.17 | a | 98.81 | 87.07 | a | 74.77 | 63.57 | 53.67 | a | 76.14 | |||||||||
1997 | 51.37 | a | 59.04 | 71.61 | 71.43 | 86.74 | 89.37 | 95.10 | 97.80 | a | 85.40 | 73.81 | 63.50 | b | 50.87 | 74.67 | ||||||||||
1998 | 54.45 | 51.07 | 61.94 | 64.14 | b | 73.03 | 83.70 | 98.47 | a | 96.74 | 83.37 | c | 71.23 | 60.62 | a | 55.00 | e | 71.15 | ||||||||
1999 | ----- | z | 58.96 | 66.97 | 63.57 | 78.89 | c | 88.73 | 91.84 | 92.61 | 87.10 | 80.55 | 68.45 | a | 56.19 | 75.81 | a | |||||||||
2000 | 56.53 | a | 57.00 | a | 64.10 | b | 74.83 | a | 84.81 | 93.21 | b | 96.48 | 94.77 | a | 88.47 | 72.52 | b | 55.89 | c | 57.68 | f | 76.24 | a | |||
2001 | 50.86 | b | 52.00 | 65.84 | 68.41 | a | 88.77 | a | 93.71 | b | 93.96 | f | 97.83 | a | 91.57 | b | 79.68 | 64.17 | f | 49.85 | e | 73.85 | b | |||
2002 | 53.25 | c | 60.04 | c | 62.55 | b | 75.50 | b | 81.47 | a | 94.35 | d | 99.79 | g | 97.24 | f | 88.41 | a | 73.52 | d | 62.73 | h | 50.68 | f | 73.64 | d |
2003 | 61.57 | j | 55.04 | d | 62.97 | b | 66.00 | d | 81.72 | f | 92.42 | f | 100.04 | d | 93.74 | d | 89.81 | d | 85.20 | a | 55.67 | c | 51.89 | d | 73.37 | c |
2004 | 53.00 | f | 51.50 | e | 71.75 | c | 71.10 | 81.83 | g | 92.35 | d | 96.74 | d | 93.17 | b | 88.67 | c | 70.64 | c | 56.88 | f | 52.37 | d | 76.48 | c | |
2005 | 53.62 | b | 53.46 | b | 62.40 | f | 67.68 | e | 82.33 | j | 89.42 | k | 99.17 | h | 91.83 | h | 87.25 | f | 78.55 | k | 65.36 | e | 54.50 | g | 60.03 | h |
2006 | 56.59 | d | 60.71 | d | 57.41 | d | 69.28 | e | 85.35 | e | 94.89 | b | 98.63 | d | 94.52 | d | 86.08 | e | 72.86 | c | 63.81 | c | 54.35 | 74.54 | ||
2007 | 50.90 | 59.18 | 70.75 | c | 74.90 | 85.03 | a | 93.83 | 99.57 | c | 94.44 | d | 85.45 | a | 73.68 | 67.52 | a | 48.19 | 75.29 | |||||||
2008 | 49.86 | c | 56.10 | 66.10 | a | 72.28 | a | 76.30 | d | 92.79 | b | 97.07 | a | 97.97 | a | 90.80 | 79.60 | a | 67.68 | b | 50.97 | 74.79 | ||||
2009 | 57.43 | a | 54.93 | a | 64.12 | f | 70.43 | b | 88.62 | j | 86.53 | 98.20 | a | 96.13 | 92.53 | 72.48 | d | 67.29 | m | 51.81 | o | 78.58 | d | |||
2010 | 53.06 | m | 54.56 | j | 54.33 | v | ----- | z | 73.10 | a | 90.97 | 98.68 | 95.10 | 90.90 | a | 74.00 | a | 61.37 | 54.83 | a | 79.87 | d | ||||
2011 | 53.92 | g | 52.52 | a | 62.23 | i | 68.77 | d | 73.82 | c | 85.96 | f | 91.67 | d | 94.16 | l | 84.14 | b | 72.27 | t | 57.86 | b | 50.79 | c | 68.51 | e |
2012 | 58.19 | o | ----- | z | 64.53 | l | 74.60 | j | ----- | z | 90.90 | 91.19 | 93.19 | 86.34 | a | 76.83 | m | ----- | z | 49.06 | n | 90.41 | h | |||
2013 | 49.80 | f | 53.52 | g | 69.57 | j | 73.40 | 78.69 | b | 93.30 | 95.86 | b | 89.63 | a | 84.22 | u | 70.45 | 59.87 | 52.16 | 76.67 | d | |||||
2014 | ----- | z | 62.25 | 65.43 | j | 72.10 | 79.52 | 91.43 | 95.45 | 89.97 | 88.03 | 78.84 | 64.83 | 52.55 | 77.50 | b | ||||||||||
2015 | 56.06 | 64.25 | 69.90 | 71.90 | 75.32 | 93.57 | 91.10 | 94.68 | 89.37 | 80.80 | p | 57.04 | e | 52.93 | d | 74.19 | a | |||||||||
2016 | 50.80 | a | 60.47 | l | 66.00 | m | 69.73 | 77.90 | a | 94.90 | 96.68 | 97.74 | h | ----- | z | 73.47 | p | 63.90 | 52.27 | p | 75.65 | f | ||||
2017 | 49.03 | b | 58.39 | 70.03 | 73.20 | 81.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.34 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.96 | 57.26 | 64.33 | 71.21 | 80.09 | 91.54 | 96.44 | 94.60 | 87.80 | 76.11 | 62.03 | 53.42 | 73.93 | |||||||||||||
S.D. | 3.60 | 3.88 | 4.50 | 3.85 | 4.32 | 3.06 | 2.57 | 2.65 | 2.61 | 3.97 | 4.18 | 3.57 | 1.41 | |||||||||||||
SKEW | 0.20 | 0.25 | -0.11 | -0.14 | -0.01 | -0.65 | -0.57 | -0.28 | -0.25 | 0.39 | -0.02 | 0.37 | -0.19 | |||||||||||||
MAX | 61.57 | 64.96 | 71.75 | 79.77 | 88.77 | 96.17 | 100.04 | 98.81 | 93.13 | 85.20 | 70.27 | 62.72 | 76.14 | |||||||||||||
MIN | 44.48 | 51.07 | 54.59 | 63.17 | 71.48 | 83.70 | 91.10 | 89.10 | 82.00 | 70.45 | 52.83 | 46.58 | 71.15 | |||||||||||||
YRS | 32 | 36 | 31 | 37 | 36 | 37 | 36 | 35 | 36 | 35 | 34 | 33 | 19 |