YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1977 | ----- | z | 60.27 | 59.23 | 72.85 | 72.58 | 90.47 | 93.60 | 91.39 | 86.12 | 77.10 | 66.31 | l | ----- | z | 78.18 | c | |||||||||
1978 | 55.11 | l | 59.88 | 67.45 | 68.26 | g | 80.91 | c | 91.62 | 95.32 | 92.16 | 85.40 | 79.27 | 61.62 | 50.10 | 76.37 | b | |||||||||
1979 | 49.29 | 56.04 | 63.00 | 69.78 | 78.19 | 88.15 | 92.95 | a | 88.78 | a | 90.78 | 76.66 | 61.03 | 57.42 | 72.67 | |||||||||||
1980 | ----- | z | 61.48 | 62.94 | 71.30 | 75.68 | 88.32 | 96.65 | 93.27 | 86.93 | 75.63 | 63.23 | 59.71 | 75.92 | a | |||||||||||
1981 | 58.71 | 60.36 | 64.21 | 75.53 | 80.42 | 93.90 | 96.85 | 96.18 | 89.90 | 72.97 | 65.48 | 58.06 | 76.05 | |||||||||||||
1982 | 54.73 | 62.31 | a | 64.08 | 72.25 | 80.19 | 87.04 | b | 94.26 | 94.13 | 86.68 | b | 72.40 | 61.02 | b | 53.32 | a | 73.53 | ||||||||
1983 | 57.15 | a | 59.79 | 64.89 | 67.72 | 80.73 | 87.98 | 95.65 | 91.64 | b | 89.97 | a | 76.77 | 64.15 | 58.06 | 74.54 | ||||||||||
1984 | 57.94 | 60.07 | 65.89 | m | 72.13 | d | 86.29 | 88.93 | 93.19 | b | 92.67 | a | 90.07 | a | 71.90 | 61.40 | 54.02 | c | 75.33 | a | ||||||
1985 | 54.50 | b | 57.38 | 62.76 | 75.68 | 82.58 | 91.50 | 95.75 | e | 94.50 | 81.43 | b | ----- | z | 60.79 | b | 54.90 | 73.80 | a | |||||||
1986 | 59.78 | a | 61.96 | 69.26 | ----- | z | 81.61 | 91.93 | 93.04 | c | 95.00 | 81.37 | 73.11 | 64.30 | 54.55 | 75.08 | a | |||||||||
1987 | 53.27 | a | 59.75 | 63.31 | b | 77.29 | a | ----- | z | 90.97 | 92.50 | a | 93.44 | 87.07 | 79.40 | a | 62.13 | ----- | z | 75.91 | b | |||||
1988 | 53.95 | a | 60.93 | 66.10 | 71.67 | a | 80.37 | 89.68 | 95.71 | 92.09 | b | 85.82 | 81.40 | a | 64.41 | a | 54.12 | b | 74.69 | |||||||
1989 | 53.19 | 58.64 | 69.78 | a | 79.33 | 82.13 | a | 90.90 | a | 96.80 | a | 92.60 | a | 88.17 | 76.12 | a | 65.50 | 55.87 | 75.75 | |||||||
1990 | 53.71 | c | 57.28 | a | 67.02 | a | 74.55 | b | 79.48 | a | 91.22 | a | 95.11 | 91.95 | a | 87.67 | a | 76.89 | 64.77 | 51.08 | 74.23 | |||||
1991 | 53.84 | b | 64.63 | a | 60.47 | a | 71.65 | 77.55 | 85.80 | 92.92 | 93.52 | 88.62 | 80.53 | a | 64.15 | 55.73 | 74.12 | |||||||||
1992 | 55.58 | a | 62.75 | a | 64.73 | a | 76.12 | 82.98 | 88.62 | 93.71 | 94.47 | a | 89.86 | a | 78.02 | 60.84 | a | 51.63 | 74.94 | |||||||
1993 | 55.47 | a | 58.46 | a | 67.63 | 74.13 | 82.53 | 88.82 | 92.93 | a | 92.52 | a | 87.47 | a | 77.05 | 61.41 | b | 53.41 | b | 74.32 | ||||||
1994 | 57.22 | a | 57.80 | a | 67.92 | 73.53 | 79.12 | e | 93.69 | a | 95.89 | 96.88 | c | 90.05 | 74.40 | 57.57 | a | 53.80 | a | 74.82 | ||||||
1995 | 55.65 | 64.32 | 65.19 | 71.22 | a | 76.40 | a | 87.00 | a | 95.15 | a | 97.53 | a | 90.64 | a | 77.18 | a | 67.79 | a | 57.63 | a | 75.48 | ||||
1996 | 57.76 | 64.05 | 67.53 | a | 75.68 | 83.37 | a | 91.42 | 97.73 | 96.50 | a | 86.91 | a | 76.78 | a | 65.15 | 56.93 | a | 76.65 | |||||||
1997 | 57.74 | 59.37 | a | 70.27 | 72.93 | a | 87.03 | 88.22 | 92.71 | b | 96.29 | 90.38 | a | 75.52 | a | 64.40 | 53.03 | b | 75.66 | |||||||
1998 | 55.60 | a | 57.39 | a | 63.79 | b | 68.16 | a | 75.84 | b | 84.97 | 96.66 | b | 97.12 | a | 87.47 | 74.02 | a | 62.60 | 55.32 | a | 73.24 | ||||
1999 | 58.03 | 60.74 | a | 65.60 | 67.32 | b | 80.13 | 88.15 | 93.85 | 94.52 | b | 89.53 | a | 78.82 | 66.29 | a | 56.53 | b | 74.96 | |||||||
2000 | 58.94 | 61.56 | d | 65.82 | a | 77.35 | 85.42 | a | 92.57 | a | 95.88 | b | 95.48 | b | 88.65 | 75.08 | a | ----- | z | 56.62 | b | 77.58 | a | |||
2001 | 54.03 | b | 57.75 | 67.64 | b | 71.48 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.69 | a | 53.43 | c | 62.00 | f | |
2002 | 54.24 | 60.04 | 63.45 | a | 75.22 | ----- | z | 92.40 | a | 96.97 | 94.19 | 89.15 | c | 74.44 | 65.43 | b | 54.60 | a | 74.56 | a | ||||||
2003 | 61.58 | 59.35 | a | 66.11 | 68.98 | 79.89 | 89.62 | a | 97.27 | 96.03 | 91.41 | a | 84.92 | r | ----- | z | 50.12 | n | 78.92 | c | ||||||
2004 | 54.40 | b | ----- | z | ----- | z | ----- | z | 76.82 | t | 88.85 | 94.57 | b | 93.48 | a | 84.98 | a | 74.17 | b | 58.50 | a | 54.66 | b | 75.45 | d | |
2005 | 56.12 | c | 58.20 | a | 63.65 | ----- | z | 82.32 | f | 86.36 | e | 96.83 | d | 93.20 | f | 86.85 | 75.35 | e | 63.75 | d | 54.33 | b | 71.27 | c | ||
2006 | 56.19 | g | 60.32 | c | 57.65 | k | 67.90 | i | ----- | z | 91.91 | h | ----- | z | 92.91 | d | ----- | z | ----- | z | ----- | z | 52.63 | e | 68.62 | i |
2007 | ----- | z | ----- | z | 66.35 | e | ----- | z | 80.88 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.62 | j |
2008 | 52.34 | f | 57.30 | g | 64.87 | e | 72.10 | f | 77.54 | f | 91.96 | c | ----- | z | 93.79 | e | ----- | z | 73.07 | x | 67.15 | f | 58.70 | u | 83.54 | i |
2009 | ----- | z | ----- | z | ----- | z | 73.50 | t | 86.79 | j | 83.80 | y | 100.22 | v | ----- | z | 94.32 | s | 73.26 | b | 64.80 | 52.52 | a | 63.53 | i | |
2010 | 56.85 | a | 59.34 | 63.21 | 67.07 | g | 76.43 | i | 87.33 | 95.31 | 92.98 | 88.18 | 74.63 | 61.40 | 56.55 | 73.58 | b | |||||||||
2011 | 54.50 | a | 54.57 | 64.78 | b | 72.24 | a | 75.82 | 86.90 | 92.37 | 96.66 | 88.37 | 76.08 | 60.40 | 51.19 | 72.82 | ||||||||||
2012 | 56.65 | 58.83 | 63.74 | 71.97 | 83.23 | 90.38 | 92.05 | 94.24 | 88.83 | 76.35 | a | 65.77 | 54.73 | 74.73 | ||||||||||||
2013 | 52.63 | 56.45 | 68.65 | a | 73.97 | 83.74 | j | 92.68 | m | 96.00 | u | 93.17 | s | 88.73 | s | 71.97 | p | 65.29 | m | 56.46 | s | 62.92 | h | |||
2014 | 62.46 | r | 65.40 | m | 71.55 | t | 75.58 | q | 82.44 | w | 92.32 | m | 97.53 | m | ----- | z | 93.00 | x | 78.94 | w | 64.54 | q | 56.33 | p | ----- | z |
2015 | 58.32 | t | 66.38 | o | 74.25 | u | 72.58 | r | 77.09 | t | ----- | z | ----- | z | ----- | z | 90.92 | r | 79.77 | r | 64.41 | s | 52.54 | r | ----- | z |
2016 | 54.00 | t | 65.25 | u | 67.40 | u | 76.92 | x | 79.21 | q | 93.42 | q | 97.71 | x | 95.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | 65.33 | y | ----- | z | ----- | z | 84.14 | i | 94.36 | b | 98.77 | 97.65 | 86.90 | 79.03 | 68.60 | 58.76 | 83.44 | e | ||||||
2018 | 61.56 | 62.36 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.56 | k | |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.96 | 59.76 | 65.32 | 72.93 | 80.42 | 89.70 | 94.97 | 94.14 | 87.86 | 76.14 | 63.43 | 54.85 | 74.62 | |||||||||||||
S.D. | 2.66 | 2.35 | 2.53 | 3.00 | 3.39 | 2.43 | 1.82 | 2.05 | 2.38 | 2.38 | 2.66 | 2.36 | 1.09 | |||||||||||||
SKEW | 0.12 | 0.16 | -0.08 | 0.01 | -0.18 | 0.08 | 0.08 | -0.17 | -1.06 | 0.27 | -0.13 | 0.05 | -0.13 | |||||||||||||
MAX | 61.58 | 64.63 | 70.27 | 79.33 | 87.03 | 94.36 | 98.77 | 97.65 | 91.41 | 81.40 | 68.60 | 59.71 | 76.65 | |||||||||||||
MIN | 49.29 | 54.57 | 59.23 | 67.32 | 72.58 | 84.97 | 92.05 | 88.78 | 81.37 | 71.90 | 57.57 | 50.10 | 72.67 | |||||||||||||
YRS | 31 | 33 | 33 | 28 | 27 | 33 | 32 | 33 | 32 | 31 | 31 | 32 | 18 |