YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | 75.13 | d | 83.05 | a | 86.88 | a | 86.57 | a | 81.93 | 70.16 | b | 59.52 | b | 51.95 | a | 74.40 | d | |
1983 | 54.68 | 54.48 | e | 58.90 | b | 62.69 | a | 76.11 | c | 82.12 | b | 87.68 | a | 83.55 | 83.60 | a | 70.47 | b | 59.25 | b | 55.67 | e | 69.10 | |||
1984 | 60.29 | x | 54.83 | h | 61.07 | a | 65.05 | a | 78.21 | c | 82.43 | a | 83.93 | c | 83.76 | n | 82.93 | c | 66.88 | a | 58.75 | b | 52.29 | e | 70.17 | c |
1985 | 50.48 | f | 53.66 | c | 62.83 | d | 70.53 | a | 76.03 | a | 86.28 | 88.26 | 87.35 | 77.72 | a | 70.36 | b | 58.45 | 53.22 | b | 71.34 | a | ||||
1986 | 59.63 | a | 57.12 | 64.92 | a | 70.32 | 78.55 | 87.55 | 85.71 | 86.08 | 78.85 | 69.60 | e | 61.05 | 53.02 | 71.03 | ||||||||||
1987 | 52.08 | 55.18 | 58.23 | 72.07 | 74.98 | 85.90 | 87.74 | 85.89 | 80.83 | 75.98 | 60.13 | 51.30 | a | 70.03 | ||||||||||||
1988 | 51.95 | a | 59.07 | 62.33 | a | 66.65 | 75.77 | a | 86.22 | 88.65 | 86.60 | 81.37 | 75.92 | 60.57 | 53.16 | 70.69 | ||||||||||
1989 | 50.27 | a | 59.02 | 66.11 | 75.50 | a | 78.10 | 86.93 | b | 90.23 | 86.10 | 83.88 | a | 71.56 | 62.87 | 53.89 | 72.04 | |||||||||
1990 | 51.52 | 52.45 | 61.77 | a | 69.73 | 76.24 | 89.13 | c | 85.28 | a | 82.20 | a | 83.09 | a | 72.67 | j | 63.09 | a | 51.92 | 69.67 | a | |||||
1991 | 51.92 | 60.38 | 55.85 | 65.65 | 74.89 | 81.10 | a | 87.35 | a | 87.47 | 81.52 | 75.16 | 59.02 | 53.98 | 69.52 | |||||||||||
1992 | 51.38 | a | 56.93 | 58.89 | 70.30 | 77.75 | a | 84.97 | 86.84 | 85.06 | 83.02 | 74.77 | 56.93 | 50.41 | b | 69.77 | ||||||||||
1993 | 54.81 | 54.07 | a | 61.17 | a | 69.57 | 78.92 | 85.45 | 87.84 | 85.94 | 80.50 | ----- | z | 57.34 | k | 52.62 | a | 71.09 | b | |||||||
1994 | 54.25 | c | 54.02 | c | 61.16 | 68.63 | c | 74.55 | c | 89.29 | b | 89.74 | b | 88.77 | a | 83.10 | 70.19 | 56.65 | j | ----- | z | 73.37 | b | |||
1995 | 52.66 | c | 60.44 | d | 62.06 | g | 64.69 | f | 71.17 | h | 82.81 | c | 89.48 | f | 89.04 | d | 85.52 | h | 72.95 | j | 63.87 | g | 59.34 | o | 71.24 | h |
1996 | 57.10 | f | 60.64 | d | 62.93 | i | 72.11 | l | 81.00 | c | 88.62 | a | 89.05 | c | 86.72 | f | 78.06 | e | 68.54 | s | 63.50 | l | 54.46 | e | 75.31 | f |
1997 | 51.50 | g | 55.61 | a | 64.38 | e | 68.67 | g | 80.48 | c | 84.68 | b | 89.25 | c | 87.08 | e | 85.39 | g | 72.21 | b | 61.87 | g | 49.52 | a | 72.90 | d |
1998 | 53.61 | d | 52.55 | g | 58.59 | h | 62.60 | a | 73.69 | g | 82.58 | f | 88.18 | n | 87.27 | c | 84.38 | d | 73.67 | j | 61.90 | a | 55.93 | i | 69.95 | g |
1999 | 56.39 | i | 56.73 | h | 62.50 | g | 62.13 | c | 75.84 | 84.53 | a | 85.66 | b | 85.61 | 82.93 | 76.44 | 66.76 | a | 52.83 | a | 74.75 | c | ||||
2000 | 56.90 | a | 58.60 | c | 59.45 | 70.97 | ----- | z | 85.71 | b | 89.42 | 85.94 | 84.95 | 69.40 | b | 52.80 | c | 54.90 | b | 69.91 | a | |||||
2001 | 49.78 | b | 52.71 | 60.42 | a | 67.40 | a | 80.33 | b | 86.45 | a | 87.31 | 85.85 | a | 85.83 | 74.56 | 64.52 | a | 50.74 | b | 70.49 | |||||
2002 | 53.36 | b | 56.38 | 60.12 | b | 72.66 | h | 76.65 | a | 88.62 | b | 88.37 | a | 87.86 | b | 84.07 | a | 69.52 | g | 62.71 | b | 51.73 | c | 70.99 | b | |
2003 | 58.37 | 55.66 | 58.69 | b | 66.07 | a | 77.97 | a | 86.27 | 90.93 | d | 87.31 | b | 83.48 | d | 76.56 | 59.84 | a | 54.22 | b | 71.28 | |||||
2004 | 53.78 | a | 51.48 | a | 67.20 | a | 67.54 | b | 79.41 | b | 85.36 | a | 88.11 | c | 85.81 | 81.28 | a | 69.74 | b | 56.98 | 53.58 | e | 70.02 | |||
2005 | 54.38 | a | 55.27 | 58.96 | c | 67.69 | d | 77.59 | c | 84.74 | c | 90.84 | c | 82.53 | b | 83.81 | c | 73.00 | b | 63.36 | b | 54.86 | b | 70.59 | ||
2006 | 55.05 | c | 58.20 | a | 59.07 | b | 69.00 | e | 79.85 | e | 88.57 | c | 88.23 | 83.69 | b | 78.21 | d | 70.57 | b | ----- | z | 51.04 | d | 71.04 | a | |
2007 | 48.63 | a | 56.45 | 63.36 | c | 68.77 | b | 78.41 | b | 84.77 | b | 87.65 | 84.65 | g | 83.13 | c | 73.60 | b | 66.05 | b | 49.68 | c | 69.14 | a | ||
2008 | 51.03 | b | 52.92 | c | 60.41 | d | 67.98 | e | 71.67 | d | 87.15 | c | 84.78 | d | 85.63 | a | 81.97 | a | 72.78 | d | 63.55 | a | 52.70 | c | 69.38 | |
2009 | 56.33 | b | 55.62 | d | 64.46 | e | 66.43 | 79.80 | i | 82.65 | f | 88.86 | j | 87.00 | f | 83.57 | i | 70.74 | f | ----- | z | ----- | z | 60.71 | h | |
2010 | 53.38 | e | ----- | z | 57.39 | d | 64.65 | g | 73.04 | d | 85.52 | a | 90.12 | a | 86.47 | b | 83.38 | b | 72.12 | b | 59.20 | c | 57.16 | b | 71.78 | b |
2011 | 50.95 | b | 53.07 | e | 63.84 | b | 68.47 | m | 73.14 | i | 87.36 | h | 88.30 | d | 89.98 | e | 84.02 | f | 73.41 | i | 60.31 | a | 47.70 | d | 64.88 | e |
2012 | 55.22 | d | 55.83 | e | 58.46 | h | 69.91 | g | 77.27 | c | ----- | z | 79.24 | n | 84.30 | k | 82.25 | b | 73.91 | b | 64.15 | d | 53.17 | m | 68.11 | f |
2013 | 48.33 | d | 50.04 | c | 63.40 | e | 66.96 | c | 71.13 | e | 89.03 | j | 86.98 | d | 85.15 | 80.38 | e | 69.82 | q | 61.96 | b | 51.17 | d | 66.55 | b | |
2014 | 55.41 | b | 58.83 | b | 59.15 | r | 67.22 | a | 70.39 | d | 87.70 | 87.93 | h | 83.56 | e | 82.71 | a | 73.98 | c | 62.88 | 53.98 | c | 69.67 | b | ||
2015 | 55.13 | 60.76 | e | 65.29 | b | 68.73 | d | 72.83 | g | 88.14 | a | 86.75 | a | 88.56 | 81.41 | a | 73.97 | b | 57.77 | 51.36 | b | 70.72 | a | |||
2016 | 51.61 | c | 61.54 | b | 63.72 | b | 63.94 | c | 72.76 | 85.72 | a | 88.55 | b | 81.41 | d | 75.00 | e | 76.07 | b | 64.73 | d | 53.64 | f | 71.37 | a | |
2017 | 51.40 | a | 58.54 | d | 66.22 | d | 67.76 | c | 71.50 | c | 85.52 | c | 86.20 | a | 85.41 | b | 77.63 | c | 74.52 | 67.33 | d | 58.75 | i | 72.00 | a | |
2018 | 60.70 | p | 57.17 | b | 61.19 | j | 73.29 | d | 73.83 | j | 79.40 | j | 83.64 | m | 82.28 | o | 81.23 | s | 65.39 | h | 59.27 | h | ----- | z | 65.23 | j |
2019 | ----- | z | 50.56 | d | 61.68 | i | 71.67 | f | 70.73 | c | 85.21 | a | 90.94 | 90.24 | b | 83.10 | 71.68 | a | 63.63 | d | 53.64 | c | 73.30 | c | ||
2020 | 52.86 | c | 54.30 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.58 | j |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.82 | k | 70.20 | h | 66.30 | j | 60.40 | p | ----- | z |
2022 | 53.34 | f | 52.91 | k | 61.81 | e | 71.50 | q | 79.02 | e | 86.29 | i | 87.93 | h | 83.65 | k | 84.56 | e | 71.46 | g | 56.89 | b | 52.26 | d | 66.91 | g |
2023 | 51.05 | c | 51.82 | f | 57.82 | f | 67.71 | d | 76.02 | c | 82.23 | b | 93.12 | a | 87.70 | a | 83.40 | f | 75.33 | e | 64.47 | a | 55.67 | a | 72.59 | c |
2024 | 51.68 | n | 55.17 | 58.93 | a | 59.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.05 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.18 | 56.06 | 61.62 | 67.96 | 76.25 | 85.72 | 88.08 | 86.17 | 81.91 | 72.81 | 61.29 | 52.71 | 70.33 | |||||||||||||
S.D. | 2.61 | 3.02 | 2.87 | 3.04 | 2.99 | 2.13 | 1.97 | 2.09 | 2.43 | 2.57 | 3.28 | 2.00 | 0.86 | |||||||||||||
SKEW | 0.38 | -0.02 | 0.11 | 0.14 | -0.45 | -0.26 | 0.21 | -0.28 | -0.97 | -0.30 | -0.29 | -0.18 | 0.42 | |||||||||||||
MAX | 59.63 | 61.54 | 67.20 | 75.50 | 81.00 | 89.29 | 93.12 | 90.24 | 85.83 | 76.56 | 67.33 | 57.16 | 72.04 | |||||||||||||
MIN | 48.33 | 50.04 | 55.85 | 62.13 | 70.39 | 81.10 | 83.93 | 81.41 | 75.00 | 66.88 | 52.80 | 47.70 | 69.10 | |||||||||||||
YRS | 32 | 35 | 31 | 30 | 33 | 33 | 33 | 33 | 34 | 29 | 32 | 32 | 12 |