YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1972 | 58.57 | a | 52.24 | d | 59.95 | 66.71 | a | 71.93 | b | 78.00 | b | 80.20 | a | 81.82 | a | 79.91 | c | 69.43 | a | 59.47 | 57.15 | 67.95 | ||||
1973 | 53.65 | e | 50.45 | 64.05 | a | 64.29 | a | 70.17 | d | 78.52 | 81.35 | a | 80.20 | a | 79.28 | 70.73 | a | 64.22 | 51.08 | a | 67.33 | |||||
1974 | 65.27 | a | 53.38 | 63.18 | 65.15 | 74.35 | 77.73 | 80.82 | 79.73 | 78.42 | 65.47 | b | 58.64 | a | 53.19 | b | 67.94 | |||||||||
1975 | 54.32 | c | 58.55 | 59.76 | 64.41 | a | 75.80 | c | 79.42 | 79.22 | d | 80.27 | 75.65 | 69.58 | a | 60.52 | 51.90 | 67.45 | ||||||||
1976 | 47.27 | 56.69 | 63.23 | 66.98 | 70.40 | b | 76.75 | b | 80.71 | 80.35 | a | 76.48 | 62.63 | 52.80 | 49.00 | 65.27 | ||||||||||
1977 | 42.44 | 49.73 | 62.28 | a | 67.62 | a | 74.02 | 81.05 | 82.15 | 80.82 | a | 79.62 | a | 65.00 | a | 61.47 | 51.18 | 66.45 | ||||||||
1978 | 44.13 | a | 44.92 | c | 55.82 | 66.72 | 73.13 | 80.60 | a | 81.18 | 80.65 | 80.02 | 68.15 | a | 64.64 | a | 54.34 | 66.19 | ||||||||
1979 | 45.66 | 49.84 | 57.50 | 69.00 | 71.68 | c | 78.20 | 80.68 | a | 80.32 | a | 77.88 | 67.85 | a | 61.29 | a | 51.87 | d | 65.98 | |||||||
1980 | 53.92 | 49.07 | ----- | z | 65.15 | 73.12 | e | 79.07 | 83.25 | a | 81.84 | 80.60 | 66.61 | 58.33 | 50.73 | 67.43 | a | |||||||||
1981 | 44.42 | 53.18 | 57.26 | 69.33 | 70.00 | a | 82.67 | 82.12 | a | 80.00 | 75.88 | 68.60 | 59.83 | 51.02 | 66.19 | |||||||||||
1982 | 49.59 | h | 56.90 | c | 62.71 | c | 66.32 | b | 73.37 | d | 79.72 | 80.10 | b | 80.89 | c | 75.88 | 68.70 | c | 63.09 | a | 57.07 | d | 69.52 | a | ||
1983 | 46.56 | f | 52.50 | f | 55.17 | e | 61.30 | c | 71.62 | f | 77.20 | 82.32 | c | 81.98 | a | 75.86 | b | 70.14 | f | 58.46 | c | 48.48 | j | 70.33 | e | |
1984 | 47.29 | e | 52.83 | f | 58.26 | h | 64.90 | d | 73.75 | c | 77.64 | a | 79.37 | a | 80.48 | d | 76.74 | c | 72.80 | d | 58.95 | h | 63.33 | k | 71.62 | d |
1985 | 46.76 | b | 55.02 | 63.87 | 66.93 | 74.37 | 79.58 | 80.47 | 80.98 | 77.55 | 74.54 | c | 67.34 | a | 50.73 | 68.18 | ||||||||||
1986 | 50.80 | d | 58.37 | b | 59.91 | c | 64.25 | 72.93 | a | 80.77 | 81.95 | 80.38 | e | 80.09 | a | 71.04 | c | 67.43 | a | 55.11 | 68.59 | |||||
1987 | 50.95 | a | 53.67 | a | 60.12 | c | 63.30 | 74.56 | 79.30 | b | 82.03 | a | 82.10 | a | 77.21 | a | 62.88 | c | 60.90 | a | 57.13 | 67.01 | ||||
1988 | 48.40 | a | 50.59 | a | 58.10 | a | 67.42 | 71.20 | a | 77.97 | a | 80.20 | c | 81.29 | 79.14 | a | 66.11 | 63.02 | 52.95 | 66.36 | ||||||
1989 | 59.77 | a | 57.23 | b | 62.20 | a | 66.22 | a | 73.03 | 78.50 | 80.79 | 81.40 | a | 78.52 | 67.91 | b | 59.38 | a | 45.78 | a | 67.56 | |||||
1990 | 55.56 | 60.50 | 61.94 | 64.50 | c | 73.52 | 79.74 | a | 81.50 | a | 82.31 | b | 78.43 | a | 69.57 | a | 61.07 | 56.84 | b | 68.79 | ||||||
1991 | 54.12 | a | 57.06 | b | 60.96 | f | 70.09 | a | 75.93 | b | 78.72 | a | 81.32 | 80.50 | 78.73 | 68.35 | 54.98 | a | 56.75 | a | 68.78 | a | ||||
1992 | 49.46 | f | 55.55 | a | 59.64 | b | 64.40 | 70.55 | 78.60 | 80.97 | 78.76 | 77.62 | a | 66.08 | 60.91 | a | 55.18 | c | 68.02 | a | ||||||
1993 | 57.94 | 52.62 | d | 56.03 | b | 60.97 | a | 70.08 | 78.73 | 81.15 | 81.77 | 77.77 | 68.77 | a | 58.41 | b | 48.69 | g | 67.66 | a | ||||||
1994 | 47.64 | f | 56.37 | b | 61.82 | f | 66.96 | f | 72.62 | b | 78.79 | b | 79.30 | a | 78.82 | 76.58 | e | 69.67 | b | 64.56 | e | 54.71 | c | 70.16 | c | |
1995 | 50.11 | 54.23 | 61.92 | a | 66.09 | a | 74.74 | 77.13 | 81.39 | 81.98 | 78.48 | 70.00 | a | 56.80 | 51.34 | 67.02 | ||||||||||
1996 | 50.11 | 53.18 | a | 56.38 | b | 62.66 | a | 74.18 | 77.53 | 80.76 | 79.27 | 77.07 | a | 66.93 | a | 59.22 | 54.13 | 65.95 | ||||||||
1997 | 53.34 | 56.61 | a | 66.03 | 63.88 | 70.52 | 76.77 | 80.63 | 79.68 | a | 74.84 | b | 65.35 | 54.12 | 47.38 | a | 65.76 | |||||||||
1998 | 50.50 | 50.89 | 53.55 | a | 62.22 | a | 72.37 | 78.67 | 79.70 | a | 78.45 | a | 75.07 | 68.15 | a | 61.37 | 55.63 | 65.55 | ||||||||
1999 | 51.29 | ----- | z | 54.60 | 65.57 | 69.05 | a | 74.63 | 77.15 | 81.34 | 76.93 | a | 69.08 | 59.41 | b | 51.35 | 66.40 | a | ||||||||
2000 | 51.71 | b | 54.70 | a | 61.97 | a | 63.31 | a | 74.58 | 78.72 | 82.03 | 80.40 | 75.63 | 67.48 | b | 58.41 | c | 49.57 | c | 66.54 | ||||||
2001 | 48.06 | 59.85 | b | 57.78 | a | 66.32 | 72.63 | 77.93 | 80.82 | a | 79.81 | 75.43 | 66.85 | 64.78 | 57.37 | 67.30 | ||||||||||
2002 | 52.78 | a | 51.55 | 59.71 | 71.10 | 73.73 | a | 78.82 | 80.23 | 81.11 | 81.72 | a | ----- | z | ----- | z | ----- | z | 70.08 | c | ||||||
2003 | ----- | z | 57.04 | a | 66.21 | b | 68.24 | c | 77.97 | 80.42 | 81.29 | b | 81.90 | 79.15 | c | 70.96 | c | 64.42 | e | 51.26 | f | 72.76 | b | |||
2004 | 51.78 | a | 52.30 | a | 63.81 | b | 65.07 | c | 75.00 | b | 80.41 | b | 82.86 | b | 81.97 | 79.02 | 74.80 | d | 64.98 | c | 52.61 | c | 68.72 | |||
2005 | 55.98 | a | 57.90 | c | 58.56 | d | 63.73 | b | 73.00 | e | 80.42 | 83.29 | b | 82.47 | a | 82.00 | a | 71.23 | a | 63.96 | b | 52.47 | l | 70.23 | a | |
2006 | 57.92 | a | 54.83 | a | 61.78 | a | 71.47 | 75.06 | 81.50 | 83.58 | 84.34 | 78.88 | 70.02 | 58.25 | d | 58.25 | a | 69.66 | ||||||||
2007 | 54.24 | 52.80 | a | 64.17 | b | 65.23 | 75.97 | b | 80.98 | 82.75 | a | 85.10 | 81.33 | 73.10 | 60.22 | 60.05 | c | 69.66 | ||||||||
2008 | 51.05 | b | 55.50 | b | 59.27 | 67.83 | 74.21 | 81.13 | 82.27 | 80.97 | 79.77 | 74.73 | p | 58.98 | 58.45 | a | 68.13 | a | ||||||||
2009 | 54.05 | 52.27 | d | 62.81 | 66.87 | 75.61 | 83.25 | 81.42 | 81.58 | 80.03 | 71.69 | 60.67 | 52.74 | 68.58 | ||||||||||||
2010 | 47.77 | 47.75 | 54.91 | i | 69.12 | 77.84 | 83.40 | 84.54 | d | 83.40 | 81.90 | 70.93 | b | 61.52 | 45.66 | 68.53 | a | |||||||||
2011 | 48.82 | f | 55.14 | 63.16 | 69.88 | 73.06 | 83.08 | 82.90 | 85.00 | 78.33 | a | 67.84 | 61.55 | 57.15 | 70.65 | a | ||||||||||
2012 | 56.71 | 58.62 | 68.61 | 69.18 | 77.47 | 79.10 | 82.16 | 80.23 | 78.48 | 70.16 | 58.22 | 57.19 | 69.68 | |||||||||||||
2013 | 58.69 | 56.09 | 55.52 | a | 68.02 | 72.03 | 81.03 | 79.95 | 81.35 | 80.65 | 74.82 | l | 59.00 | 57.19 | 68.14 | a | ||||||||||
2014 | 44.00 | 55.30 | 57.68 | 65.70 | 74.11 | 80.68 | 81.34 | 84.00 | 79.60 | 71.03 | a | 54.95 | 57.21 | 67.13 | ||||||||||||
2015 | 52.03 | 48.54 | 64.92 | 72.68 | 77.76 | 81.75 | 83.66 | i | 83.16 | 79.27 | 71.32 | 66.83 | 63.76 | 69.27 | a | |||||||||||
2016 | 50.92 | 55.17 | 63.66 | 68.53 | 74.92 | 82.32 | 84.74 | 84.19 | 81.77 | 74.21 | 64.58 | 60.61 | 70.47 | |||||||||||||
2017 | 60.08 | 62.39 | 63.90 | a | 70.12 | 74.90 | 79.48 | 82.85 | 83.32 | 78.82 | 72.76 | 63.88 | 55.24 | 70.65 | ||||||||||||
2018 | 47.95 | 64.96 | c | 61.89 | 64.87 | 76.74 | 81.38 | f | 83.16 | 81.85 | 82.03 | 75.63 | l | 59.95 | 56.98 | 68.04 | b | |||||||||
2019 | 54.55 | 61.86 | 60.71 | 67.95 | 78.34 | 82.85 | 83.76 | 83.56 | e | 83.92 | 76.73 | 59.73 | 59.26 | 71.10 | ||||||||||||
2020 | 57.83 | d | 58.66 | 69.35 | a | 69.68 | 74.85 | a | 81.88 | a | 82.82 | 82.42 | 78.77 | 74.48 | 68.48 | 55.00 | 71.19 | |||||||||
2021 | 54.19 | 57.04 | 65.02 | 65.90 | d | 74.78 | a | 80.57 | 82.71 | 82.42 | a | 79.72 | c | 74.21 | 60.02 | 62.92 | 69.96 | |||||||||
2022 | 52.58 | 57.68 | 63.23 | 69.32 | 76.71 | 83.30 | 82.87 | 82.12 | b | 79.75 | 69.15 | 63.78 | 57.48 | 69.83 | ||||||||||||
2023 | 58.97 | 62.95 | 64.12 | a | 70.09 | m | 75.44 | 78.12 | r | 84.43 | a | 86.54 | d | 79.90 | 70.45 | b | 65.61 | u | ----- | z | 72.85 | d | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.40 | 55.06 | 61.13 | 66.53 | 73.88 | 79.70 | 81.60 | 81.57 | 78.69 | 69.56 | 61.00 | 54.63 | 67.94 | |||||||||||||
S.D. | 4.92 | 4.12 | 3.64 | 2.66 | 2.25 | 1.98 | 1.51 | 1.69 | 2.05 | 3.10 | 3.46 | 4.07 | 1.72 | |||||||||||||
SKEW | 0.12 | 0.02 | -0.09 | 0.10 | -0.07 | 0.07 | -0.17 | 0.66 | 0.11 | 0.04 | 0.00 | -0.13 | 0.33 | |||||||||||||
MAX | 65.27 | 64.96 | 69.35 | 72.68 | 78.34 | 83.40 | 84.74 | 86.54 | 83.92 | 76.73 | 68.48 | 63.76 | 71.19 | |||||||||||||
MIN | 42.44 | 44.92 | 53.55 | 60.97 | 69.05 | 74.63 | 77.15 | 78.45 | 74.84 | 62.63 | 52.80 | 45.66 | 65.27 | |||||||||||||
YRS | 46 | 49 | 47 | 50 | 51 | 50 | 51 | 52 | 52 | 47 | 49 | 45 | 33 |