YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | 77.14 | b | 86.38 | a | 87.94 | d | 88.28 | a | 82.18 | e | 76.83 | b | 58.48 | d | 50.06 | g | 79.60 | e |
1988 | 51.63 | e | 60.22 | d | 61.74 | j | 68.02 | c | 76.91 | i | 87.00 | f | 91.56 | d | 89.09 | d | 82.61 | b | 78.54 | c | 61.67 | g | 54.15 | e | 71.98 | d |
1989 | 52.90 | e | 57.74 | c | 66.13 | d | 74.50 | 77.47 | a | 85.18 | 91.89 | 88.55 | a | 85.47 | a | 73.18 | a | 63.80 | 54.33 | b | 72.59 | |||||
1990 | 52.93 | a | 52.85 | a | 63.11 | 70.82 | b | 75.60 | 88.62 | a | 89.50 | a | 86.17 | a | 83.38 | b | 75.40 | a | 63.52 | 51.72 | b | 71.13 | ||||
1991 | 52.79 | 62.11 | a | 55.29 | 64.72 | a | 73.69 | 80.95 | 89.48 | 90.03 | b | 83.63 | 76.19 | 61.10 | 54.19 | b | 70.35 | |||||||||
1992 | 52.80 | a | 58.47 | 59.75 | a | 70.85 | 77.21 | 83.82 | 88.79 | 87.08 | a | 84.88 | a | 75.65 | a | 57.59 | a | 51.41 | b | 70.69 | ||||||
1993 | 54.87 | 54.78 | a | 61.40 | a | 68.33 | 79.53 | a | 85.10 | 88.11 | 88.71 | 83.81 | a | 74.00 | 59.64 | a | 55.07 | c | 71.11 | |||||||
1994 | 55.15 | 54.91 | a | 63.29 | 68.76 | a | 75.42 | a | 89.26 | a | 91.08 | a | 91.86 | b | 85.88 | 71.02 | 57.68 | 55.18 | 71.62 | |||||||
1995 | 51.90 | 61.20 | 61.15 | 65.02 | a | 72.47 | a | 83.33 | a | 91.22 | a | 92.37 | a | 87.11 | b | 75.94 | 66.88 | 56.16 | b | 72.06 | ||||||
1996 | 55.76 | 60.66 | a | 62.68 | 70.58 | 78.68 | 88.24 | a | 92.56 | 91.02 | 80.48 | a | 72.44 | 63.42 | 56.31 | 72.74 | ||||||||||
1997 | 53.68 | 56.02 | 66.68 | 67.62 | 81.73 | 83.05 | 90.66 | 90.95 | 87.63 | 72.50 | 63.45 | a | 50.74 | b | 72.06 | |||||||||||
1998 | 54.29 | b | 51.28 | a | 59.33 | b | 63.53 | a | 72.40 | 81.90 | 91.16 | 91.76 | 84.97 | 72.29 | 61.73 | 53.65 | 69.86 | |||||||||
1999 | 55.95 | 58.68 | 62.21 | 64.07 | a | 74.82 | c | 85.00 | 88.60 | 89.52 | 84.97 | 77.71 | 67.73 | 53.88 | c | 71.93 | ||||||||||
2000 | 57.31 | 59.79 | 61.27 | 72.18 | 81.08 | a | 87.32 | 91.19 | 89.43 | b | 86.62 | a | 69.88 | b | 53.57 | a | 55.69 | 72.11 | ||||||||
2001 | 51.60 | 54.30 | 60.98 | 67.47 | a | 80.76 | b | 87.57 | 90.50 | c | 89.47 | 87.43 | b | 75.18 | 64.52 | a | 51.66 | 71.79 | ||||||||
2002 | 53.58 | a | 58.86 | 61.13 | 71.98 | a | 76.16 | 87.82 | b | 91.25 | a | 90.28 | b | 85.20 | c | 70.50 | 64.07 | b | 52.38 | a | 71.93 | |||||
2003 | 61.17 | b | 55.75 | 60.52 | 65.98 | b | 78.43 | a | 86.28 | a | 92.97 | b | 91.08 | a | 86.69 | a | 79.16 | b | 59.98 | a | 54.89 | c | 72.74 | |||
2004 | 54.81 | b | 52.06 | d | 69.72 | d | 67.89 | b | 78.66 | b | 84.92 | 89.02 | d | 87.62 | b | 83.93 | a | 71.47 | b | 57.12 | b | 54.75 | c | 71.00 | ||
2005 | 55.32 | 55.98 | 58.66 | 68.03 | a | 77.74 | 84.71 | a | 92.25 | a | 87.81 | 84.80 | 74.58 | 64.07 | 55.25 | a | 71.60 | |||||||||
2006 | 56.23 | 59.45 | 59.17 | b | 68.22 | 79.44 | 89.18 | b | 92.31 | 88.10 | a | 81.50 | 72.45 | 64.95 | a | 52.67 | d | 71.97 | ||||||||
2007 | 51.63 | 58.05 | 65.74 | 68.67 | a | 78.45 | b | 86.12 | a | 91.58 | 90.79 | 84.93 | 75.09 | b | 66.86 | i | 50.95 | c | 72.91 | a | ||||||
2008 | 52.39 | d | 54.03 | m | 61.98 | c | 72.38 | v | 73.02 | i | 87.02 | e | 89.87 | e | 88.69 | b | 84.75 | f | 75.25 | a | 65.07 | c | 53.64 | c | 71.74 | d |
2009 | 56.71 | c | 57.30 | 62.97 | a | 67.23 | 80.19 | 83.40 | a | 93.15 | 90.40 | 85.83 | a | 70.48 | 65.86 | a | 51.14 | c | 72.06 | |||||||
2010 | 55.60 | b | 55.52 | c | 58.48 | 66.21 | a | 72.92 | a | 84.64 | b | 91.82 | 90.55 | 87.50 | b | 73.77 | 59.68 | 57.95 | a | 71.22 | ||||||
2011 | 53.23 | a | 52.30 | 63.30 | a | 70.43 | a | 74.03 | b | 85.17 | c | 91.54 | c | 93.47 | a | 87.31 | d | 76.47 | a | 60.53 | a | 50.95 | b | 71.56 | ||
2012 | 56.23 | 56.38 | a | 61.53 | 70.05 | a | 78.70 | c | 87.70 | 89.93 | a | 91.20 | a | 84.28 | a | 74.35 | 66.32 | 53.84 | c | 72.54 | ||||||
2013 | 51.67 | a | 53.09 | 64.82 | a | 70.34 | b | 78.00 | a | 87.74 | a | 91.38 | c | 89.70 | a | 83.98 | a | 69.87 | 63.83 | a | 53.68 | c | 71.51 | |||
2014 | 57.55 | a | 60.02 | a | 64.06 | 70.32 | 77.92 | 86.98 | 90.77 | 87.21 | 85.36 | b | 75.11 | 62.35 | 54.45 | a | 72.68 | |||||||||
2015 | 55.63 | a | 61.98 | c | 68.18 | a | 68.98 | 73.53 | 87.38 | a | 89.43 | b | 91.85 | 85.11 | b | 75.08 | a | 58.65 | 51.90 | a | 72.31 | |||||
2016 | 52.53 | b | 63.72 | b | 65.10 | 69.69 | a | 75.57 | a | 90.00 | 92.16 | 88.35 | 83.90 | a | 78.25 | a | 65.91 | b | 55.97 | a | 73.43 | |||||
2017 | 52.85 | 59.04 | c | 67.10 | 70.29 | b | 78.12 | b | 89.62 | 91.03 | 89.26 | 83.52 | 77.53 | 68.23 | 57.79 | b | 73.70 | |||||||||
2018 | 60.03 | 57.63 | a | 62.77 | 73.07 | a | 78.56 | 86.87 | 92.45 | 89.23 | 86.73 | 70.69 | 60.90 | 52.97 | a | 72.66 | ||||||||||
2019 | 53.71 | 51.31 | a | 61.03 | 70.43 | 71.26 | 84.70 | 92.68 | 92.29 | 85.02 | 71.55 | 63.53 | 53.26 | 70.90 | ||||||||||||
2020 | 53.53 | a | 55.79 | a | 60.05 | 68.40 | a | 79.81 | b | 86.02 | 92.82 | a | 94.37 | 87.05 | 77.42 | 65.43 | 54.42 | 72.93 | ||||||||
2021 | 54.23 | 57.30 | a | 60.65 | 72.18 | 77.95 | 90.96 | b | 90.13 | a | 88.56 | 85.08 | 71.23 | 68.02 | a | 57.90 | b | 72.85 | ||||||||
2022 | 54.98 | 56.25 | 63.53 | 72.25 | b | 78.71 | 88.90 | 91.77 | 88.31 | 86.47 | 72.55 | 57.17 | 52.84 | 71.98 | ||||||||||||
2023 | 50.71 | 53.23 | 57.02 | 69.77 | 76.98 | 81.90 | 95.45 | 92.76 | 84.98 | 76.93 | d | 63.92 | 57.24 | b | 71.74 | |||||||||||
2024 | 51.42 | a | 55.83 | 59.32 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.62 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.31 | 56.94 | 62.31 | 69.05 | 77.12 | 86.21 | 91.08 | 89.90 | 85.01 | 74.23 | 62.53 | 54.03 | 71.92 | |||||||||||||
S.D. | 2.36 | 3.20 | 3.12 | 2.57 | 2.66 | 2.43 | 1.58 | 1.89 | 1.72 | 2.66 | 3.57 | 2.04 | 0.85 | |||||||||||||
SKEW | 0.91 | 0.03 | 0.24 | -0.24 | -0.49 | -0.21 | 0.07 | 0.31 | -0.52 | -0.00 | -0.45 | 0.22 | -0.23 | |||||||||||||
MAX | 61.17 | 63.72 | 69.72 | 74.50 | 81.73 | 90.96 | 95.45 | 94.37 | 87.63 | 79.16 | 68.23 | 57.95 | 73.70 | |||||||||||||
MIN | 50.71 | 51.28 | 55.29 | 63.53 | 71.26 | 80.95 | 87.94 | 86.17 | 80.48 | 69.87 | 53.57 | 50.74 | 69.86 | |||||||||||||
YRS | 37 | 36 | 35 | 35 | 35 | 36 | 37 | 37 | 36 | 37 | 35 | 36 | 33 |