YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 87.06 | l | 85.19 | 72.10 | 64.48 | 73.93 | i | |||
1951 | 59.87 | 65.75 | 71.60 | a | 78.13 | 88.55 | 97.47 | 99.00 | 97.23 | 90.63 | 84.06 | 68.48 | c | 67.23 | 80.67 | |||||||||||
1952 | 68.23 | 67.72 | 68.39 | 77.00 | 86.87 | 94.32 | k | 93.29 | 99.52 | 86.50 | 81.34 | b | 64.03 | 58.77 | 77.42 | a | ||||||||||
1953 | 69.40 | a | 62.96 | 75.13 | 78.83 | 87.74 | 98.93 | 95.29 | 94.94 | 90.71 | b | 76.10 | j | 67.27 | s | 55.32 | 80.93 | b | ||||||||
1954 | 63.03 | 74.32 | ----- | z | 86.42 | r | 90.11 | m | 94.00 | a | 99.10 | 93.68 | c | 89.75 | v | 74.95 | l | 68.36 | b | 65.00 | 79.64 | e | ||||
1955 | 55.00 | h | ----- | z | ----- | z | 85.50 | 87.48 | 94.70 | 91.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.69 | h | ||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | 62.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.39 | k | |
1972 | ----- | z | 67.28 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.28 | k | |
1973 | ----- | z | 56.14 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.14 | k | |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.43 | ----- | z | 56.43 | k | |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.74 | 59.74 | k | |
1979 | 51.27 | a | 64.92 | b | 70.93 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 87.19 | ----- | z | ----- | z | 68.58 | h | |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.63 | 58.39 | 59.51 | j | ||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | 61.21 | c | 68.04 | e | 74.10 | b | 83.03 | a | 95.75 | c | 91.65 | g | 101.63 | d | 98.85 | e | 94.03 | a | 74.03 | a | 57.28 | a | 50.43 | c | 78.04 | a |
2001 | 51.13 | 59.73 | b | 65.00 | a | 82.30 | 90.42 | 98.13 | 99.55 | 93.71 | 86.70 | 79.13 | a | 67.00 | 56.45 | 77.44 | ||||||||||
2002 | 59.03 | b | 58.31 | b | 68.94 | 81.87 | 88.13 | 94.96 | b | 92.94 | 95.94 | 86.04 | d | 71.21 | b | 61.26 | c | 54.62 | b | 76.10 | ||||||
2003 | 58.46 | e | 59.48 | e | 71.63 | a | 81.93 | 91.18 | c | ----- | z | 94.13 | a | 94.10 | b | 84.64 | b | 77.21 | c | 65.77 | 60.18 | c | 76.25 | a | ||
2004 | 58.65 | e | 55.34 | 69.10 | ----- | z | 87.87 | 92.79 | a | 91.97 | a | 89.40 | a | 82.07 | 74.39 | 59.68 | b | 57.50 | c | 74.43 | a | |||||
2005 | 58.47 | a | 58.89 | a | 67.41 | b | 77.87 | 83.60 | a | 94.20 | 94.10 | a | 89.29 | 90.53 | 74.00 | a | 70.41 | a | 59.43 | a | 76.52 | |||||
2006 | 62.06 | 60.79 | 72.66 | b | 83.83 | 94.18 | c | 96.27 | 91.74 | d | 91.38 | b | 82.17 | a | 74.53 | a | 67.67 | 55.06 | 77.70 | |||||||
2007 | 48.04 | c | 60.64 | 70.67 | a | 73.66 | a | 78.72 | b | 90.30 | 89.29 | 91.35 | 86.97 | a | 81.03 | 65.86 | a | 58.97 | a | 74.62 | ||||||
2008 | 55.20 | a | 67.31 | 72.61 | h | 81.14 | a | 89.68 | 98.28 | e | 92.39 | 89.39 | 84.77 | 79.10 | a | 69.73 | 67.08 | g | 80.70 | b | ||||||
2009 | 63.50 | a | 70.35 | b | 74.17 | b | 81.62 | a | 89.63 | a | 96.07 | 96.10 | 96.83 | a | 85.37 | 77.30 | a | 71.50 | b | 55.45 | 79.82 | |||||
2010 | 58.47 | a | 57.96 | a | 70.79 | b | 78.17 | 85.55 | 98.62 | a | 89.48 | 97.68 | 89.29 | b | 81.61 | 70.59 | a | 63.55 | 78.48 | |||||||
2011 | 59.97 | 64.61 | 78.65 | 86.00 | a | 88.68 | 100.28 | a | 97.81 | d | 99.03 | 89.40 | 80.71 | 68.40 | 49.29 | 80.24 | ||||||||||
2012 | 61.71 | 62.11 | a | 76.96 | c | 86.45 | a | 87.00 | 96.25 | b | 93.37 | a | 94.43 | c | 86.20 | 75.87 | 71.85 | d | 61.92 | e | 79.51 | |||||
2013 | 55.89 | d | 63.18 | f | 74.15 | d | 80.69 | d | 86.21 | g | 94.41 | c | 90.41 | b | 94.77 | e | 87.92 | e | 77.31 | b | 63.29 | f | 55.19 | d | 78.97 | c |
2014 | 57.37 | a | 63.86 | f | 70.04 | c | 79.24 | e | 85.89 | d | 93.62 | a | 93.13 | 93.66 | b | 80.86 | a | 80.73 | a | 61.31 | d | 59.61 | c | 77.77 | a | |
2015 | 49.28 | f | 57.30 | a | 66.24 | b | 76.67 | c | 80.90 | a | 89.68 | b | 94.75 | c | 95.43 | a | 89.04 | g | 78.07 | c | 65.12 | d | 62.96 | h | 78.24 | c |
2016 | 58.00 | b | 66.73 | c | 73.12 | e | 77.50 | d | 83.67 | a | 90.24 | e | 97.38 | g | 89.64 | f | 84.56 | c | 82.54 | e | 66.50 | h | 58.70 | d | 75.01 | c |
2017 | 57.23 | i | 71.29 | d | 77.18 | c | 81.00 | f | 84.46 | g | 93.93 | c | 93.69 | e | 88.54 | e | 85.70 | c | 77.12 | e | 69.76 | e | 59.54 | g | 82.15 | d |
2018 | 58.00 | d | 62.14 | f | 73.37 | d | 76.87 | g | 93.38 | g | 96.12 | d | 93.65 | e | 92.96 | c | 82.96 | d | 71.77 | e | 64.60 | e | 55.50 | e | 76.55 | c |
2019 | 57.89 | c | 63.65 | b | 66.96 | f | 79.59 | c | 80.57 | c | 93.36 | e | 94.56 | d | 98.26 | d | 90.48 | e | 77.52 | d | 64.93 | c | 61.48 | b | 78.39 | a |
2020 | 60.48 | b | 58.48 | 71.20 | a | 77.30 | c | 88.50 | e | 95.08 | f | 98.28 | b | 96.97 | 83.61 | b | 79.28 | b | 71.56 | c | 58.72 | b | 76.76 | a | ||
2021 | 54.83 | g | 53.76 | c | 71.06 | 72.29 | b | 82.77 | a | 91.46 | b | 90.43 | a | 90.58 | 90.14 | a | 82.57 | c | 70.92 | e | 71.21 | c | 78.84 | a | ||
2022 | 56.57 | c | 58.09 | e | 71.81 | d | 82.92 | f | 93.25 | g | 95.89 | b | 98.72 | f | 92.92 | g | 87.56 | c | 77.21 | g | 58.23 | q | 59.71 | j | 73.98 | g |
2023 | 60.75 | s | 57.29 | n | 68.62 | r | 77.93 | p | 86.14 | b | 95.90 | i | 98.15 | r | 101.14 | q | 93.31 | q | 78.92 | s | 63.46 | q | 63.00 | q | 86.14 | k |
2024 | 57.62 | r | 65.08 | q | 71.33 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.01 | 62.67 | 71.77 | 80.03 | 87.06 | 95.00 | 94.27 | 94.32 | 86.79 | 78.65 | 66.35 | 58.93 | 78.11 | |||||||||||||
S.D. | 4.67 | 5.29 | 3.33 | 3.67 | 4.03 | 2.86 | 3.28 | 3.32 | 3.28 | 4.02 | 4.61 | 4.84 | 1.98 | |||||||||||||
SKEW | -0.09 | 0.34 | 0.06 | -0.09 | -0.05 | -0.16 | 0.53 | -0.19 | 0.16 | 0.09 | -0.63 | 0.40 | -0.31 | |||||||||||||
MAX | 69.40 | 74.32 | 78.65 | 86.45 | 95.75 | 100.28 | 101.63 | 99.52 | 94.03 | 87.19 | 72.10 | 71.21 | 80.67 | |||||||||||||
MIN | 48.04 | 53.76 | 65.00 | 72.29 | 78.72 | 89.68 | 89.29 | 88.54 | 80.86 | 71.21 | 56.43 | 49.29 | 74.62 | |||||||||||||
YRS | 26 | 27 | 25 | 23 | 24 | 24 | 26 | 25 | 25 | 26 | 26 | 26 | 10 |