YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.08 | q | 92.42 | 88.83 | a | 89.10 | 72.90 | 62.10 | 51.65 | 76.17 | f | |||||
1952 | 47.52 | 55.24 | 50.16 | 64.87 | 76.52 | 78.70 | 92.94 | 91.74 | 84.33 | 77.44 | f | 60.90 | 53.56 | d | 68.77 | a | ||||||||||
1953 | 60.44 | f | 57.14 | 59.81 | 64.43 | 65.97 | a | 77.41 | a | 94.00 | 86.04 | c | 88.73 | 75.28 | b | 66.60 | 58.10 | 72.14 | a | |||||||
1954 | 57.03 | 65.43 | 58.74 | 68.93 | a | 79.16 | 74.74 | k | 91.56 | o | 84.97 | 81.28 | a | 75.26 | 69.69 | a | 57.89 | m | 71.17 | c | ||||||
1955 | 51.39 | c | 53.84 | c | 57.47 | a | 59.50 | f | 72.03 | a | 80.40 | 87.33 | a | 94.00 | 86.43 | 78.19 | 62.27 | 56.38 | b | 70.89 | a | |||||
1956 | 57.26 | 52.28 | 61.50 | a | 63.25 | b | 72.19 | 84.47 | 90.53 | a | 87.42 | 87.47 | 70.03 | 70.93 | c | 64.23 | a | 71.80 | ||||||||
1957 | 51.10 | 61.43 | 59.61 | 64.66 | a | 68.10 | 86.66 | a | 92.77 | 89.61 | c | 85.48 | a | 67.97 | 60.67 | 60.03 | 70.67 | |||||||||
1958 | 57.45 | 58.30 | a | 53.55 | 63.52 | a | 77.00 | 82.29 | f | 89.45 | b | 91.15 | d | 85.21 | f | 79.09 | h | 66.80 | 67.00 | e | 69.36 | c | ||||
1959 | 58.80 | a | 55.36 | 65.17 | a | 74.10 | a | 73.16 | 87.97 | 96.89 | d | 90.58 | 80.07 | 76.65 | 69.17 | 59.58 | 73.96 | |||||||||
1960 | 51.00 | 53.38 | 62.90 | 65.17 | 72.42 | 91.10 | 94.52 | 92.31 | b | 89.57 | b | 73.00 | b | 60.50 | 58.58 | 72.04 | ||||||||||
1961 | 61.90 | 57.71 | 57.67 | a | 68.47 | 70.81 | 88.21 | a | ----- | z | 90.97 | 82.13 | 74.00 | a | 62.12 | d | 54.55 | 69.87 | a | |||||||
1962 | 57.19 | 52.32 | 53.74 | 71.03 | 69.93 | b | 84.40 | 89.85 | e | 91.63 | a | 86.60 | 75.77 | 63.97 | 64.68 | 71.76 | ||||||||||
1963 | 56.27 | a | 63.33 | a | 57.58 | 57.21 | a | 72.00 | 79.07 | 89.06 | 88.55 | 86.71 | b | 72.72 | b | 61.50 | b | 61.43 | a | 70.45 | ||||||
1964 | 53.74 | 57.76 | 56.10 | 63.31 | a | 70.29 | 78.88 | e | 91.60 | a | 90.90 | b | 84.53 | 80.13 | a | 58.83 | 52.61 | 69.89 | ||||||||
1965 | 57.16 | 59.50 | 58.13 | 62.45 | a | 72.48 | 78.77 | 89.84 | 89.68 | 79.80 | 81.41 | b | 61.47 | 65.73 | t | 71.88 | a | |||||||||
1966 | ----- | z | 57.89 | s | 63.00 | a | 72.77 | 79.03 | a | 83.50 | 89.77 | a | 92.97 | 84.93 | 77.16 | 63.70 | 56.16 | 76.30 | b | |||||||
1967 | 58.46 | e | 61.95 | g | 59.13 | 51.90 | a | ----- | z | 79.53 | 94.45 | 95.40 | a | 85.86 | a | 79.39 | 67.83 | a | 50.94 | 72.29 | b | |||||
1968 | 57.37 | a | 62.41 | 61.03 | 67.43 | 74.03 | a | 86.00 | 92.48 | 86.30 | a | ----- | z | 72.83 | b | 60.83 | 53.06 | 70.34 | a | |||||||
1969 | 56.84 | 52.11 | 59.45 | 64.17 | 77.97 | 78.47 | 91.61 | 94.10 | b | 87.04 | c | 69.97 | a | 66.80 | 57.42 | 71.33 | ||||||||||
1970 | 56.29 | 61.71 | 59.61 | 62.37 | 78.00 | 84.90 | 95.28 | b | 93.30 | a | 85.37 | 73.81 | 64.27 | 51.84 | 72.23 | |||||||||||
1971 | 56.87 | 56.96 | 61.29 | 62.97 | 66.94 | 80.16 | e | 92.10 | 92.43 | a | 84.83 | 71.19 | 59.83 | 47.45 | 69.42 | |||||||||||
1972 | 55.61 | 61.21 | a | 68.26 | 67.27 | 77.71 | 85.60 | 92.81 | 86.00 | 77.20 | 64.71 | c | 56.37 | 51.32 | 70.34 | |||||||||||
1973 | 51.03 | 57.14 | 51.48 | b | 65.17 | 78.77 | 87.27 | 91.29 | 88.61 | 81.34 | a | 74.06 | 58.38 | a | 57.90 | 70.21 | ||||||||||
1974 | 53.19 | 57.54 | 59.77 | 64.47 | 75.33 | a | 86.17 | 89.81 | 89.65 | 88.83 | 72.90 | 62.70 | 53.23 | a | 71.13 | |||||||||||
1975 | 57.77 | 55.79 | 56.52 | 56.70 | 76.48 | 83.80 | 88.97 | 88.10 | 87.31 | a | 71.77 | 61.27 | 60.42 | 70.41 | ||||||||||||
1976 | 60.90 | 57.72 | 59.23 | 62.20 | 78.60 | a | 83.93 | a | 90.06 | 83.06 | 80.27 | 73.52 | 68.43 | 63.10 | a | 71.75 | ||||||||||
1977 | 56.55 | 63.96 | 57.32 | 72.50 | 64.68 | 87.27 | 91.35 | 89.97 | 82.59 | a | 77.19 | 64.20 | 59.74 | 72.28 | ||||||||||||
1978 | 57.39 | 56.96 | 63.10 | a | 60.93 | 74.63 | a | 83.90 | 90.48 | 89.37 | a | 80.90 | 81.03 | 59.30 | 53.90 | 70.99 | ||||||||||
1979 | 51.94 | 55.19 | a | 58.53 | a | 64.87 | 77.73 | a | 86.33 | 90.29 | 86.16 | 88.47 | 72.45 | 62.37 | 62.71 | 71.42 | ||||||||||
1980 | 57.61 | 62.69 | 57.45 | 66.82 | b | 68.81 | 79.70 | 91.16 | 88.55 | 85.73 | 78.03 | 67.37 | 66.16 | 72.51 | ||||||||||||
1981 | 61.94 | 62.36 | 57.58 | 67.87 | 74.87 | a | 88.97 | 91.94 | 92.81 | 84.93 | 67.71 | 62.93 | 58.00 | 72.66 | ||||||||||||
1982 | 52.55 | b | 58.00 | a | 56.04 | c | 62.72 | a | 76.67 | g | 79.59 | a | 88.43 | a | 89.63 | a | 81.19 | c | 73.75 | c | 58.77 | 55.62 | b | 68.75 | a | |
1983 | 60.79 | c | 58.60 | c | 56.82 | c | 59.58 | d | 73.12 | e | 81.79 | b | 87.07 | b | 86.42 | e | 85.56 | l | 71.61 | h | 57.26 | g | 52.63 | d | 68.53 | c |
1984 | 61.35 | 60.23 | g | 63.58 | g | 64.00 | g | 80.48 | d | 83.37 | c | 92.29 | j | 90.04 | g | 86.48 | g | 66.32 | l | 60.35 | d | 52.64 | c | 67.64 | g | |
1985 | 56.71 | 58.93 | a | 57.85 | d | 73.10 | 75.17 | b | 89.73 | d | 93.60 | a | 89.57 | a | 75.71 | f | 71.64 | c | 55.96 | b | 61.60 | a | 71.26 | a | ||
1986 | 64.96 | c | 58.12 | b | 63.94 | 63.50 | f | 76.04 | e | 85.68 | b | 86.59 | b | 91.20 | a | 74.30 | g | 72.22 | d | 67.43 | b | 60.66 | b | 72.68 | b | |
1987 | 54.25 | c | 57.46 | b | 58.44 | d | 74.12 | d | 76.23 | e | 86.19 | d | 84.33 | d | 89.46 | e | 84.03 | 77.93 | d | 59.30 | c | 50.23 | a | 71.00 | ||
1988 | 57.21 | c | 63.46 | a | 62.63 | a | 65.92 | f | 72.52 | h | 81.48 | e | 93.07 | c | 89.27 | a | 85.96 | c | 81.10 | a | 60.00 | c | 55.07 | b | 72.93 | b |
1989 | 55.85 | d | 54.56 | c | 62.15 | d | 73.33 | c | 72.14 | c | 82.59 | c | 90.37 | d | 86.37 | d | 83.80 | e | 72.20 | f | 68.17 | a | 64.17 | a | 72.14 | a |
1990 | 56.86 | c | 56.35 | e | 62.11 | c | 69.35 | d | 72.19 | e | 82.84 | e | 90.20 | a | 86.71 | c | 81.93 | a | 78.04 | c | 66.33 | c | 53.50 | c | 71.37 | |
1991 | 56.33 | a | 68.35 | b | 53.00 | d | 62.15 | d | 70.43 | h | 79.22 | c | 89.62 | b | 86.50 | e | 87.62 | d | 78.17 | a | 65.64 | b | ----- | z | 72.66 | b |
1992 | ----- | z | 61.40 | n | 59.52 | d | 71.07 | b | 80.61 | c | 82.78 | g | 85.65 | e | 91.33 | d | 85.54 | f | 74.86 | b | ----- | z | 53.96 | c | 73.86 | e |
1993 | 53.64 | c | 54.40 | c | ----- | z | 63.96 | e | ----- | z | ----- | z | 85.30 | d | ----- | z | 84.41 | c | 74.54 | g | 63.85 | d | 57.30 | a | 66.12 | e |
1994 | 61.39 | c | 54.92 | c | 64.23 | e | 66.63 | k | 71.54 | e | 85.44 | c | 90.57 | c | 90.97 | 83.10 | 70.48 | 54.83 | a | 55.77 | 71.20 | a | ||||
1995 | 54.13 | 65.20 | c | 58.94 | ----- | z | 66.29 | 79.10 | 88.64 | f | 89.75 | c | 84.80 | 77.77 | a | 70.37 | c | 56.08 | f | 71.82 | c | |||||
1996 | 58.64 | c | 58.15 | c | 62.88 | e | 68.29 | f | 74.88 | f | 84.15 | d | 92.11 | d | 92.36 | f | 83.31 | d | 69.96 | e | 62.07 | b | 56.37 | a | 69.74 | c |
1997 | 55.07 | a | 56.46 | d | 67.81 | d | 65.74 | g | 78.69 | b | 80.83 | g | 87.15 | d | 87.57 | a | 84.44 | e | 72.33 | g | 62.70 | c | 54.93 | b | 70.54 | c |
1998 | 57.24 | b | 49.15 | b | 58.46 | e | 59.89 | c | 62.00 | c | 74.74 | g | 88.88 | e | 91.83 | b | 79.80 | e | 69.75 | g | 58.90 | a | 55.07 | c | 66.12 | b |
1999 | 58.24 | b | 55.33 | d | 57.36 | c | 59.22 | g | 71.50 | g | 80.50 | d | 87.19 | e | 86.00 | e | 84.73 | 79.85 | e | 68.85 | c | 59.21 | c | 71.73 | b | |
2000 | 56.43 | c | 58.36 | g | 58.89 | c | 69.00 | d | 75.96 | f | 86.64 | b | 86.96 | c | 89.27 | e | 75.50 | v | 70.38 | e | 57.81 | d | 63.04 | d | 70.94 | c |
2001 | 53.90 | a | 53.26 | e | 61.50 | c | 62.22 | g | 82.82 | c | 86.96 | d | 87.64 | f | 90.96 | f | 85.38 | f | 77.42 | g | 63.15 | c | 52.78 | d | 64.91 | e |
2002 | 50.67 | s | 63.00 | c | 61.24 | f | 66.38 | f | 73.07 | b | 84.07 | p | 91.79 | b | 87.66 | b | 84.88 | e | 71.21 | c | 65.28 | a | 54.86 | b | 73.97 | d |
2003 | 65.66 | b | 54.81 | b | 60.85 | d | 58.92 | f | 72.24 | f | 83.28 | e | 91.90 | b | 89.89 | d | 89.32 | e | 81.21 | g | 56.93 | c | 56.48 | h | 74.08 | d |
2004 | 55.13 | 54.52 | d | 68.83 | a | 68.68 | e | 75.15 | d | 83.92 | e | 89.81 | d | 88.96 | c | 84.33 | i | 66.88 | e | 57.63 | c | 57.80 | a | 69.76 | a | |
2005 | 57.81 | d | 56.81 | b | 60.30 | d | 65.10 | i | 71.33 | d | 78.33 | f | 92.72 | b | 90.67 | d | 80.08 | d | 71.55 | i | 66.44 | c | 59.39 | c | 70.62 | c |
2006 | 55.82 | c | 60.72 | c | 51.10 | b | 63.48 | g | 75.21 | c | 85.46 | d | 93.17 | a | 87.42 | e | 84.93 | b | 71.14 | b | 62.14 | a | 55.50 | c | 71.15 | a |
2007 | 53.13 | a | 55.68 | 65.18 | c | 64.21 | a | 76.57 | c | 83.27 | 89.20 | a | 89.60 | a | 78.46 | b | 69.74 | 66.03 | 51.68 | 70.23 | ||||||
2008 | 51.87 | 54.07 | a | 60.14 | b | 65.63 | 72.06 | 84.53 | 90.14 | b | 90.65 | 86.00 | 75.97 | a | 64.20 | 52.90 | 70.68 | |||||||||
2009 | 59.87 | 53.50 | 57.52 | b | 64.50 | 78.56 | d | 79.03 | a | 92.48 | 88.06 | 86.77 | 67.80 | a | 62.81 | d | 53.43 | a | 70.36 | |||||||
2010 | 58.59 | b | 55.28 | c | 59.14 | c | 59.89 | b | 65.65 | e | 80.57 | g | 89.84 | f | 87.45 | b | 84.25 | b | 71.96 | e | 59.48 | c | 57.72 | f | 66.86 | c |
2011 | 56.43 | c | 53.11 | 56.61 | 63.31 | d | 67.31 | b | 77.92 | d | 86.46 | e | 89.63 | a | 87.62 | a | 73.77 | 58.50 | 54.97 | 68.80 | ||||||
2012 | 60.20 | a | 54.41 | 57.48 | 64.43 | 74.94 | 82.50 | 89.80 | a | 92.90 | 87.47 | 72.58 | 66.33 | 52.03 | 71.26 | |||||||||||
2013 | 53.68 | 54.79 | 64.03 | 68.07 | 74.57 | a | 84.87 | 93.13 | a | 88.30 | a | 83.40 | 71.63 | a | 63.41 | a | 58.77 | a | 71.55 | |||||||
2014 | 64.03 | 56.93 | 62.07 | c | 66.57 | 75.81 | 85.37 | 91.58 | 89.29 | 86.13 | 77.68 | 64.14 | a | 55.19 | 72.90 | |||||||||||
2015 | 60.68 | 65.04 | 67.53 | a | 66.73 | 70.52 | 87.47 | 87.68 | 90.93 | d | 86.60 | 74.48 | 57.07 | 50.68 | 72.12 | |||||||||||
2016 | 53.23 | 61.83 | 62.26 | 66.34 | a | 71.10 | 87.83 | 91.52 | 90.71 | 82.76 | a | 71.83 | a | 64.70 | 52.90 | 71.42 | ||||||||||
2017 | 50.83 | a | 57.15 | b | 62.90 | 65.34 | a | 73.94 | 89.59 | m | 93.52 | h | 91.50 | g | 81.83 | l | 78.30 | h | 65.38 | d | 63.64 | f | 62.59 | f | ||
2018 | 61.03 | a | 56.88 | c | 55.65 | k | 65.18 | h | 72.90 | k | 85.13 | o | 93.69 | r | 89.57 | h | 85.50 | f | 74.56 | o | 62.90 | i | 56.28 | m | 58.96 | j |
2019 | 57.64 | q | 49.70 | e | 55.86 | i | 67.75 | f | 65.46 | c | 84.61 | g | 87.13 | h | 90.16 | f | 82.41 | c | 73.33 | d | 68.96 | d | 54.13 | a | 65.67 | f |
2020 | 54.72 | b | 61.96 | c | 60.85 | k | 62.82 | h | 73.82 | n | 83.19 | i | 94.75 | c | ----- | z | ----- | z | ----- | z | 56.67 | o | 58.61 | 67.51 | h | |
2021 | ----- | z | 52.33 | y | 53.82 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.83 | y | ----- | z | 54.33 | y | ----- | z |
2022 | ----- | z | 66.57 | u | 63.33 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.50 | q | 67.09 | s | 62.41 | n | ----- | z |
2024 | 53.59 | i | 55.00 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.65 | 57.62 | 59.74 | 65.46 | 73.52 | 83.61 | 90.63 | 89.50 | 84.53 | 73.88 | 63.00 | 56.50 | 71.26 | |||||||||||||
S.D. | 3.60 | 4.02 | 3.94 | 4.53 | 4.50 | 3.41 | 2.61 | 2.45 | 2.91 | 3.84 | 3.89 | 4.33 | 1.08 | |||||||||||||
SKEW | 0.15 | 0.44 | 0.01 | -0.21 | -0.41 | -0.08 | -0.20 | -0.04 | -0.39 | 0.05 | 0.05 | 0.50 | 0.10 | |||||||||||||
MAX | 65.66 | 68.35 | 68.83 | 74.12 | 82.82 | 91.10 | 96.89 | 95.40 | 89.57 | 81.41 | 70.93 | 67.00 | 73.96 | |||||||||||||
MIN | 47.52 | 49.15 | 50.16 | 51.90 | 62.00 | 77.41 | 84.33 | 83.06 | 77.20 | 64.71 | 54.83 | 47.45 | 68.80 | |||||||||||||
YRS | 64 | 64 | 63 | 52 | 58 | 56 | 61 | 62 | 57 | 56 | 66 | 62 | 31 |