YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 98.00 | b | 91.60 | a | 87.34 | a | 85.17 | a | 64.27 | 59.29 | 80.94 | f | ||
1980 | 62.16 | 62.52 | 69.74 | 77.77 | 85.90 | 101.63 | 100.65 | 93.65 | 86.53 | 73.97 | 59.42 | f | 62.03 | a | 79.69 | a | ||||||||||
1981 | 56.40 | a | 64.00 | 66.55 | 80.27 | 85.42 | 96.93 | 96.80 | a | 89.77 | 84.40 | 77.30 | a | ----- | z | 63.65 | 78.32 | a | ||||||||
1982 | 58.35 | 61.89 | 73.26 | 78.03 | 84.06 | 96.67 | 97.42 | 95.03 | 90.03 | 78.23 | a | 63.52 | a | 52.74 | 77.44 | |||||||||||
1983 | 54.52 | b | 62.64 | 68.90 | 70.57 | 86.45 | 93.70 | 97.58 | 95.65 | 92.30 | 77.42 | 68.17 | 55.52 | 76.95 | ||||||||||||
1984 | 54.13 | 63.24 | 70.97 | 78.23 | 89.45 | 91.73 | 94.68 | 91.06 | 87.37 | 72.81 | 64.47 | 57.48 | 76.30 | |||||||||||||
1985 | 51.74 | 58.14 | 70.42 | 79.83 | 87.68 | 93.37 | 95.58 | 94.83 | a | 85.32 | b | 75.68 | 69.80 | 59.19 | 76.80 | |||||||||||
1986 | 62.32 | 67.54 | 73.26 | 83.90 | 85.17 | g | 90.17 | 93.29 | 92.81 | 87.33 | 75.19 | 62.17 | 53.97 | 76.54 | a | |||||||||||
1987 | 57.23 | 63.79 | 66.32 | 75.93 | 83.16 | 92.43 | 96.16 | 93.94 | 84.63 | 82.00 | 64.86 | i | 57.29 | 77.53 | a | |||||||||||
1988 | 57.77 | 64.76 | 72.19 | 79.13 | 87.52 | 94.00 | f | 94.03 | 90.90 | 89.47 | 81.48 | 71.97 | 57.48 | 76.97 | a | |||||||||||
1989 | 59.84 | 63.68 | 75.87 | 85.20 | 90.97 | 97.93 | 96.26 | 93.26 | 87.69 | a | 83.97 | 70.47 | 55.84 | 80.08 | ||||||||||||
1990 | 61.58 | 63.80 | h | 73.27 | i | 80.00 | 88.16 | 102.87 | 93.30 | a | 88.32 | 85.67 | 79.42 | 71.27 | d | 59.75 | g | 83.40 | c | |||||||
1991 | 56.77 | 65.18 | 70.71 | 80.70 | 90.39 | 95.90 | 91.71 | 92.23 | 82.33 | 82.17 | h | 65.67 | 58.00 | 77.24 | a | |||||||||||
1992 | 53.42 | 62.86 | 72.23 | 81.80 | 85.35 | 94.60 | 98.65 | 95.48 | 93.73 | 82.65 | 62.60 | 58.10 | 78.46 | |||||||||||||
1993 | 60.35 | 62.89 | 71.58 | 81.13 | 89.74 | 96.97 | 96.90 | 96.90 | 86.77 | 78.65 | 65.63 | 60.77 | 79.02 | |||||||||||||
1994 | 61.61 | 65.57 | 73.57 | a | 82.13 | 87.00 | 102.10 | 101.10 | a | 99.26 | 91.07 | 81.74 | 67.03 | 63.39 | 81.30 | |||||||||||
1995 | 60.68 | 69.32 | 71.77 | 77.13 | 88.29 | 95.27 | 98.83 | a | 96.19 | 88.97 | a | 83.90 | 71.80 | 61.39 | 80.30 | |||||||||||
1996 | 62.03 | a | 67.00 | 69.58 | 79.83 | 97.00 | 97.00 | 92.10 | 86.55 | 86.30 | 81.00 | 71.40 | 61.61 | h | 80.89 | a | ||||||||||
1997 | 55.68 | 61.86 | 74.00 | 74.87 | 87.42 | 95.79 | a | 97.97 | a | 95.71 | 92.13 | 80.03 | 70.71 | f | 54.73 | e | 79.11 | a | ||||||||
1998 | 63.32 | 63.07 | 69.90 | 77.17 | 92.58 | 101.17 | 99.29 | 94.48 | 94.33 | 81.39 | 71.50 | 57.97 | 80.51 | |||||||||||||
1999 | 64.23 | 70.04 | 72.77 | 80.80 | 88.55 | 94.33 | 94.35 | 95.53 | a | 88.77 | 81.94 | 75.00 | 59.23 | 80.46 | ||||||||||||
2000 | 66.97 | 72.38 | 77.00 | 85.40 | 95.61 | 95.93 | 100.74 | 97.16 | 94.77 | 78.84 | 61.87 | 58.58 | 82.10 | |||||||||||||
2001 | 59.16 | 68.68 | 71.03 | 84.69 | a | 92.65 | 99.17 | 100.77 | 98.52 | 93.57 | 85.00 | 68.79 | a | 65.58 | 82.30 | |||||||||||
2002 | 63.90 | 60.07 | 72.42 | 86.93 | 90.90 | 101.70 | 97.35 | 100.03 | 91.90 | 77.65 | 63.27 | 64.75 | c | 80.91 | ||||||||||||
2003 | 63.35 | 64.39 | 72.52 | 82.23 | 91.00 | 95.70 | 98.87 | 96.61 | 90.70 | 83.00 | 71.30 | 59.58 | 80.77 | |||||||||||||
2004 | 59.03 | 61.10 | 74.94 | 79.93 | 91.03 | 97.00 | 96.71 | 92.39 | 87.57 | 79.10 | 62.67 | 59.35 | 78.40 | |||||||||||||
2005 | 63.42 | 62.86 | 70.94 | 80.27 | 90.48 | 99.70 | 102.19 | 94.84 | 95.37 | 79.39 | 75.23 | 64.65 | 81.61 | |||||||||||||
2006 | 66.06 | 68.04 | 75.61 | 88.33 | 94.77 | 100.53 | 99.77 | 91.42 | 85.97 | 81.39 | 75.00 | 63.71 | 82.55 | |||||||||||||
2007 | 53.13 | 67.36 | 77.48 | 81.97 | 85.45 | 98.77 | 96.71 | 96.58 | 92.13 | 86.71 | 70.93 | 61.29 | 80.71 | |||||||||||||
2008 | 62.94 | 69.00 | 75.42 | 82.27 | 93.61 | 102.60 | 93.32 | 95.29 | 83.67 | 83.42 | 72.87 | 63.81 | 81.52 | |||||||||||||
2009 | 68.61 | 72.32 | 77.97 | 84.87 | 94.26 | 97.53 | 101.35 | 97.90 | 87.03 | 81.68 | 73.23 | 57.45 | 82.85 | |||||||||||||
2010 | 59.74 | 63.14 | 73.00 | 85.03 | 92.81 | 103.47 | 100.06 | 100.39 | 91.00 | 85.97 | 73.70 | 61.60 | a | 82.49 | ||||||||||||
2011 | 63.42 | 64.57 | 82.23 | 88.67 | 91.42 | 103.60 | 101.90 | 104.23 | 93.43 | 86.97 | 71.40 | 60.00 | a | 84.32 | ||||||||||||
2012 | 67.19 | 71.97 | 82.13 | a | 89.30 | 91.13 | a | 102.00 | 96.55 | 98.71 | 94.47 | 87.45 | 74.77 | 62.16 | 84.82 | |||||||||||
2013 | 60.13 | 64.00 | 77.16 | 83.37 | 88.42 | 99.50 | 91.42 | 94.58 | 87.13 | 80.52 | 65.07 | 57.32 | 79.05 | |||||||||||||
2014 | 60.94 | 69.11 | 74.39 | 80.90 | 87.32 | 102.20 | 97.03 | 90.97 | 86.30 | 83.90 | 63.38 | a | 60.13 | 79.71 | ||||||||||||
2015 | 57.52 | 67.57 | 71.32 | 78.83 | 83.90 | 97.67 | 95.97 | 98.61 | 93.77 | 80.61 | 70.70 | 56.26 | 79.39 | |||||||||||||
2016 | 56.61 | 68.45 | 76.26 | 78.83 | 85.00 | 95.43 | 100.71 | 91.06 | 86.60 | 83.55 | 70.83 | 62.81 | 79.68 | |||||||||||||
2017 | 63.74 | 70.50 | 79.97 | 82.37 | 85.00 | 95.23 | 94.33 | j | ----- | z | 89.40 | 82.52 | 75.10 | 63.77 | a | 78.76 | b | |||||||||
2018 | 59.86 | c | 66.36 | f | 70.33 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.86 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.25 | 65.55 | 73.39 | 81.28 | 89.19 | 97.79 | 97.27 | 94.80 | 89.16 | 81.09 | 69.05 | 59.75 | 80.39 | |||||||||||||
S.D. | 4.07 | 3.56 | 3.71 | 3.91 | 3.52 | 3.53 | 2.96 | 3.59 | 3.50 | 3.53 | 4.38 | 3.26 | 2.15 | |||||||||||||
SKEW | -0.12 | 0.25 | 0.52 | -0.09 | 0.26 | -0.05 | -0.23 | 0.11 | 0.14 | -0.32 | -0.25 | -0.09 | -0.01 | |||||||||||||
MAX | 68.61 | 72.38 | 82.23 | 89.30 | 97.00 | 103.60 | 102.19 | 104.23 | 95.37 | 87.45 | 75.23 | 65.58 | 84.82 | |||||||||||||
MIN | 51.74 | 58.14 | 66.32 | 70.57 | 83.16 | 90.17 | 91.42 | 86.55 | 82.33 | 72.81 | 61.87 | 52.74 | 76.30 | |||||||||||||
YRS | 39 | 37 | 37 | 38 | 37 | 37 | 38 | 38 | 39 | 38 | 35 | 37 | 28 |