YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 92.88 | j | 89.27 | 85.00 | a | 70.92 | 58.03 | 51.45 | 70.94 | g | ||||
1976 | 50.97 | 56.78 | 58.73 | 65.35 | 79.00 | 86.33 | 92.84 | 89.53 | 81.55 | 70.55 | 60.23 | 49.48 | 70.11 | |||||||||||||
1977 | 48.90 | 55.89 | a | 55.38 | a | 69.11 | b | 70.60 | b | 88.18 | 92.60 | 91.61 | 83.77 | 74.35 | a | 60.63 | 56.11 | c | 70.59 | |||||||
1978 | 51.03 | 54.86 | 62.13 | 66.11 | b | 75.84 | 88.28 | 93.39 | 90.05 | 84.58 | 76.34 | 57.82 | 46.39 | 70.57 | ||||||||||||
1979 | 45.40 | b | 51.11 | 57.70 | a | 65.90 | 75.10 | 86.17 | 90.16 | 86.16 | 86.47 | 73.35 | 55.65 | 52.66 | 68.82 | |||||||||||
1980 | 53.97 | 57.74 | 57.47 | a | 66.23 | 71.98 | b | 84.58 | 93.42 | a | 91.13 | 84.67 | 73.71 | 61.43 | 56.52 | 71.07 | ||||||||||
1981 | 55.73 | 57.36 | 59.82 | 72.18 | 77.63 | 91.65 | 94.89 | 93.44 | 85.35 | 69.35 | 62.18 | 53.83 | a | 72.78 | ||||||||||||
1982 | 49.83 | a | 56.89 | 58.65 | 66.85 | 76.52 | 83.78 | 90.29 | 90.52 | 81.80 | 68.58 | 58.28 | c | 50.43 | b | 69.37 | ||||||||||
1983 | 50.35 | a | 54.57 | a | 58.65 | a | 62.28 | a | 76.32 | 84.85 | 92.28 | a | 89.03 | a | 86.58 | 71.60 | 59.73 | 52.91 | b | 69.93 | ||||||
1984 | 52.21 | 54.40 | 62.50 | 67.03 | 82.69 | 85.62 | 93.36 | i | 90.02 | a | 86.02 | 68.68 | 57.87 | 49.77 | a | 68.80 | a | |||||||||
1985 | 49.48 | 50.43 | a | 58.53 | a | 70.48 | 78.73 | 88.88 | a | 93.68 | 91.95 | 78.40 | 71.42 | 56.85 | 50.48 | a | 69.94 | |||||||||
1986 | 54.89 | 54.95 | 64.32 | 66.77 | 77.62 | a | 88.90 | a | 89.32 | 92.45 | 77.93 | 68.89 | 59.64 | a | 49.85 | 70.46 | ||||||||||
1987 | 47.65 | 55.02 | 57.42 | 72.36 | a | 77.77 | a | 87.98 | 88.88 | a | 89.97 | 83.26 | a | 75.31 | 57.43 | 47.37 | a | 70.03 | ||||||||
1988 | 48.97 | a | 55.71 | a | 60.89 | 67.12 | 76.61 | 87.72 | 94.71 | 88.47 | 81.43 | 77.39 | 59.03 | 49.65 | a | 70.64 | ||||||||||
1989 | 48.33 | b | 53.41 | a | 64.43 | b | 75.03 | 78.19 | 87.00 | 94.28 | a | 90.53 | 84.92 | 72.69 | 60.92 | 49.98 | 71.64 | |||||||||
1990 | 48.90 | b | 50.58 | b | 61.76 | b | 70.18 | b | 75.61 | 88.33 | 88.65 | a | 88.67 | a | 84.48 | 73.05 | 59.93 | 46.34 | c | 69.71 | ||||||
1991 | 48.59 | b | 60.08 | d | 55.59 | c | 65.68 | 73.69 | 82.09 | a | 91.79 | 90.82 | 85.17 | a | 75.92 | a | 59.00 | a | 50.81 | b | 69.94 | |||||
1992 | 49.37 | a | 57.02 | a | 59.50 | b | 70.74 | a | 79.98 | 85.69 | a | 90.24 | 90.85 | 84.30 | 73.32 | 56.22 | 46.94 | 70.35 | ||||||||
1993 | 51.17 | a | 53.87 | a | 61.00 | b | 69.55 | 78.06 | 85.20 | 89.48 | 90.31 | 83.60 | 73.23 | 56.30 | 50.36 | b | 70.18 | |||||||||
1994 | 51.39 | 51.92 | b | 63.21 | 69.95 | 75.98 | b | 90.53 | 93.63 | 93.94 | 85.67 | 70.79 | 53.91 | b | 50.58 | e | 70.96 | |||||||||
1995 | 51.63 | e | 60.04 | b | 60.60 | 65.55 | 72.47 | 82.70 | b | 91.18 | a | 92.81 | b | 88.00 | 72.45 | a | 63.83 | a | 52.66 | 71.16 | ||||||
1996 | 51.98 | a | 58.95 | 62.70 | a | 71.47 | 78.79 | 87.83 | 94.82 | 94.13 | 84.32 | 72.94 | 61.02 | b | 52.68 | 72.64 | ||||||||||
1997 | 52.95 | c | 55.46 | b | 65.72 | a | 68.15 | 83.82 | 84.98 | 90.63 | 92.10 | 86.72 | 71.26 | 60.40 | 48.83 | a | 71.75 | |||||||||
1998 | 52.28 | b | 51.65 | a | 59.11 | 63.22 | 73.23 | 82.00 | 94.34 | 93.07 | a | 84.90 | 70.75 | a | 59.62 | a | 51.45 | a | 69.63 | |||||||
1999 | 53.27 | e | 56.12 | 61.53 | 63.60 | 76.03 | 85.55 | 90.82 | 91.66 | 86.26 | a | 75.94 | 63.76 | a | 52.66 | 71.43 | ||||||||||
2000 | 54.47 | 57.03 | 61.47 | a | 73.93 | 83.12 | a | 90.13 | 93.11 | 92.13 | 85.18 | 71.58 | 53.14 | b | 51.78 | a | 72.26 | |||||||||
2001 | 49.00 | e | 52.50 | d | 62.26 | 67.47 | 83.42 | 88.67 | 91.56 | 92.19 | 86.05 | 74.45 | 62.84 | a | 47.97 | a | 71.53 | |||||||||
2002 | 49.67 | a | 53.43 | a | 59.37 | a | 70.83 | a | 76.82 | 88.17 | 94.71 | 90.58 | 85.33 | 70.30 | a | 61.80 | b | 51.02 | 71.00 | |||||||
2003 | 56.07 | b | 55.87 | b | 60.39 | 65.32 | 78.83 | a | 86.28 | 95.43 | a | 90.92 | a | 86.32 | 78.23 | a | 56.32 | b | 51.02 | a | 71.75 | |||||
2004 | 50.53 | 51.96 | a | 69.37 | a | 70.28 | a | 79.48 | 87.10 | 92.71 | 91.29 | 83.95 | 70.35 | a | 55.98 | 50.87 | a | 71.16 | ||||||||
2005 | 52.03 | 55.37 | a | 59.66 | c | 66.82 | 78.45 | 85.22 | 93.92 | 88.74 | 84.09 | a | 72.65 | 60.40 | 49.92 | a | 70.60 | |||||||||
2006 | 51.72 | b | 55.42 | b | 57.57 | a | 68.09 | a | 81.92 | 91.66 | b | 96.57 | a | 91.71 | 82.93 | 71.47 | 62.22 | a | 48.32 | n | 73.75 | a | ||||
2007 | 47.28 | d | 56.00 | a | 64.87 | a | 69.41 | b | 80.39 | 86.78 | 94.26 | 93.48 | a | 84.42 | e | 71.43 | a | 64.68 | b | 48.38 | e | 71.78 | ||||
2008 | 49.43 | i | 52.90 | 62.15 | a | 69.72 | 75.16 | 88.65 | 93.88 | b | 94.22 | f | 85.98 | b | 73.80 | a | 63.18 | 50.00 | 71.54 | b | ||||||
2009 | 52.87 | 52.98 | h | 61.13 | 67.38 | 83.44 | 82.43 | o | 95.68 | 91.79 | 87.68 | 71.02 | c | 61.23 | b | 49.90 | 72.21 | b | ||||||||
2010 | 52.31 | b | 54.80 | 58.08 | 65.55 | 73.56 | 86.37 | 95.18 | c | 89.69 | b | 85.96 | b | 72.43 | b | 56.23 | d | 52.95 | b | 70.26 | ||||||
2011 | 48.34 | c | 51.04 | c | 61.27 | a | 68.48 | a | 72.35 | a | 84.75 | d | 91.77 | 93.91 | b | 85.93 | c | 72.64 | c | 57.70 | b | 46.88 | b | 69.59 | ||
2012 | 51.60 | a | 55.04 | a | 56.15 | u | 71.64 | e | 80.86 | c | 90.02 | a | 91.85 | a | 93.40 | 86.93 | a | 74.82 | c | 63.11 | c | 52.05 | b | 73.76 | a | |
2013 | 47.68 | 52.27 | 64.58 | g | 70.87 | 80.24 | 90.50 | a | 94.34 | 90.48 | b | 83.28 | 68.89 | 60.39 | b | 49.89 | c | 71.71 | a | |||||||
2014 | 54.02 | c | 59.17 | e | 65.14 | b | 70.70 | b | 79.15 | 87.87 | 93.18 | 88.40 | 85.38 | 74.08 | a | 60.57 | b | 52.62 | a | 72.52 | ||||||
2015 | 52.31 | b | 61.04 | 66.84 | c | 69.00 | a | 73.83 | d | 89.77 | 90.30 | a | 92.98 | a | 86.75 | d | 74.42 | a | 55.50 | b | 45.34 | f | 73.89 | a | ||
2016 | 48.39 | d | ----- | z | ----- | z | ----- | z | 79.68 | c | 91.27 | b | 93.57 | a | 90.21 | 81.37 | c | 74.45 | a | 61.66 | b | 49.62 | a | 74.47 | c | |
2017 | 48.48 | a | 56.02 | a | 62.79 | b | 69.20 | b | 75.83 | d | 88.89 | b | 93.12 | a | 91.23 | a | 80.93 | c | 71.47 | a | 61.88 | a | 50.66 | 70.88 | ||
2018 | 52.52 | a | 53.50 | f | 59.44 | d | 70.08 | f | 78.35 | 88.12 | 92.98 | a | 91.77 | 87.17 | a | 70.83 | a | ----- | z | 48.43 | a | 74.40 | c | |||
2019 | 47.55 | a | 47.52 | 60.48 | a | 72.12 | b | 71.52 | b | 82.21 | b | 90.41 | c | 90.28 | a | 80.70 | 66.27 | a | 56.90 | 47.54 | c | 67.79 | ||||
2020 | 47.98 | a | 51.02 | a | 56.92 | a | 66.29 | a | 78.85 | 84.45 | b | 92.74 | b | 96.19 | b | 87.81 | a | 76.37 | 61.82 | 51.12 | a | 70.96 | ||||
2021 | 51.24 | 56.16 | 60.00 | b | 71.83 | c | 79.70 | a | 91.59 | a | 93.02 | a | 90.66 | 85.88 | d | 70.69 | e | 65.18 | 53.89 | l | 74.18 | a | ||||
2022 | 51.89 | 54.44 | b | 62.73 | g | 71.58 | 79.81 | b | 89.88 | b | 93.44 | 89.38 | c | 86.11 | b | 71.24 | 52.36 | a | 49.15 | d | 71.75 | a | ||||
2023 | 49.48 | 52.45 | 56.26 | b | 68.93 | 78.14 | b | 83.02 | a | 97.09 | b | 92.69 | 84.08 | 75.19 | d | 62.67 | f | 53.28 | a | 71.87 | a | |||||
2024 | 50.21 | 57.08 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.64 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 50.77 | 54.85 | 60.74 | 68.62 | 77.61 | 87.15 | 92.79 | 91.18 | 84.60 | 72.49 | 59.46 | 50.55 | 70.72 | |||||||||||||
S.D. | 2.38 | 2.84 | 3.02 | 2.84 | 3.30 | 2.66 | 2.02 | 1.85 | 2.24 | 2.49 | 3.04 | 2.27 | 1.08 | |||||||||||||
SKEW | 0.18 | -0.10 | 0.55 | -0.05 | -0.12 | -0.18 | -0.20 | 0.06 | -1.07 | 0.07 | -0.30 | 0.32 | -0.22 | |||||||||||||
MAX | 56.07 | 61.04 | 69.37 | 75.03 | 83.82 | 91.66 | 97.09 | 96.19 | 88.00 | 78.23 | 65.18 | 56.52 | 72.78 | |||||||||||||
MIN | 45.40 | 47.52 | 55.38 | 62.28 | 70.60 | 82.00 | 88.65 | 86.16 | 77.93 | 66.27 | 52.36 | 46.34 | 67.79 | |||||||||||||
YRS | 48 | 46 | 44 | 46 | 48 | 47 | 47 | 48 | 49 | 49 | 47 | 46 | 36 |