YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.61 | 90.23 | 87.50 | 79.13 | 75.87 | ----- | z | 85.87 | g | |||||
1982 | 62.00 | 65.21 | 74.45 | 80.10 | 86.87 | 98.53 | 98.81 | 95.58 | 91.77 | 80.77 | 65.53 | 54.32 | 79.50 | |||||||||||||
1983 | 55.16 | 64.21 | 69.97 | a | 73.17 | a | 88.00 | 96.77 | 98.84 | 95.84 | 93.00 | 80.26 | 69.00 | 61.69 | b | 78.83 | ||||||||||
1984 | 57.32 | 65.48 | 74.90 | a | 80.57 | 92.10 | 95.00 | 96.35 | 93.90 | 90.07 | 74.87 | 67.33 | 59.00 | a | 78.91 | |||||||||||
1985 | 54.35 | 62.71 | 72.13 | 82.00 | 90.16 | 96.29 | b | 95.84 | 93.77 | 85.50 | 78.03 | a | 70.72 | a | 61.65 | 78.60 | ||||||||||
1986 | 64.32 | 67.50 | 74.43 | a | 83.73 | 87.86 | b | 91.97 | 92.37 | a | 91.74 | 88.07 | 77.58 | 63.85 | c | 54.87 | a | 78.19 | ||||||||
1987 | 59.16 | 63.57 | 69.42 | 77.20 | 85.19 | 94.24 | a | 95.37 | a | 91.61 | 85.17 | 82.61 | 68.07 | a | 57.29 | 77.41 | ||||||||||
1988 | 58.71 | 66.29 | a | 72.35 | 79.87 | 89.13 | 94.33 | 92.94 | 89.74 | 87.70 | 81.74 | 70.80 | 58.42 | 78.50 | ||||||||||||
1989 | 59.68 | 66.68 | 76.45 | 87.69 | a | 92.00 | 97.30 | 93.57 | a | 90.00 | 87.83 | 80.45 | 69.53 | 56.52 | 79.81 | |||||||||||
1990 | 60.97 | a | 65.15 | a | 72.57 | a | 81.67 | 87.69 | b | 99.80 | 90.50 | a | 87.75 | k | 85.41 | a | 78.90 | a | 68.10 | 59.86 | b | 77.33 | a | |||
1991 | 56.39 | 66.41 | a | 70.59 | b | 81.45 | a | 90.42 | 95.27 | 89.43 | a | 90.40 | a | 81.62 | a | 81.48 | 65.93 | b | 56.58 | 77.16 | ||||||
1992 | 51.63 | a | 63.18 | a | 71.07 | a | 82.79 | a | 83.69 | b | 96.21 | a | 95.35 | 91.68 | 90.00 | 81.52 | 63.36 | b | 56.30 | a | 77.23 | |||||
1993 | 59.52 | b | 64.39 | 72.90 | a | 82.10 | 89.37 | a | 96.04 | b | 95.15 | d | 92.61 | 88.28 | a | 78.23 | a | 66.59 | a | 59.87 | a | 78.75 | ||||
1994 | 61.13 | a | 66.31 | b | 72.70 | a | 81.83 | a | 90.27 | a | 100.63 | 97.27 | a | 96.13 | 89.30 | 80.83 | b | 69.03 | a | 61.32 | 80.56 | |||||
1995 | 59.69 | b | 69.41 | a | 75.27 | a | 81.36 | e | 89.75 | c | 95.07 | a | 96.70 | a | 93.81 | 87.52 | a | 83.19 | 70.70 | 63.59 | b | 80.50 | ||||
1996 | 62.97 | 72.33 | b | 73.33 | a | 83.78 | c | 95.13 | 98.03 | 95.40 | a | 91.27 | a | 87.37 | 83.13 | a | 69.77 | 62.43 | a | 81.25 | ||||||
1997 | 57.33 | a | 63.71 | 75.42 | 77.73 | 89.97 | 95.10 | 94.61 | 93.16 | 91.07 | 80.03 | 66.30 | 53.55 | 78.17 | ||||||||||||
1998 | 62.87 | 62.07 | 71.03 | 77.80 | 90.81 | 97.73 | 95.81 | 92.94 | 91.43 | 80.32 | 71.93 | 60.90 | 79.64 | |||||||||||||
1999 | 64.68 | 71.61 | 75.71 | 80.77 | 88.39 | 93.97 | 91.58 | 92.81 | 88.80 | 80.35 | 73.93 | 57.58 | 80.01 | |||||||||||||
2000 | 65.87 | 72.10 | 75.23 | 85.60 | 93.77 | 92.57 | 96.47 | a | 93.39 | 93.00 | 77.61 | 61.50 | 58.77 | 80.49 | ||||||||||||
2001 | 56.90 | a | 67.63 | a | 72.06 | 82.20 | 91.16 | 96.37 | 95.19 | 91.71 | 89.28 | a | 82.74 | 68.30 | 59.94 | 79.46 | ||||||||||
2002 | 62.35 | 62.32 | 73.71 | 87.00 | 91.35 | 98.47 | 93.61 | 95.39 | 89.63 | 77.39 | 66.87 | 56.55 | 79.55 | |||||||||||||
2003 | 64.90 | 63.68 | 71.39 | 81.30 | 91.94 | 96.17 | 96.97 | 95.16 | 89.47 | 81.87 | 70.60 | 60.65 | 80.34 | |||||||||||||
2004 | 60.26 | 60.72 | 74.68 | 77.83 | 91.03 | 95.57 | 95.52 | 91.55 | 85.63 | 79.03 | 62.87 | 56.77 | 77.62 | |||||||||||||
2005 | 62.13 | 61.57 | 69.61 | 80.47 | 88.39 | 96.83 | 97.16 | 90.55 | 90.90 | 77.73 | a | 71.63 | 62.65 | 79.14 | ||||||||||||
2006 | 64.84 | 68.30 | a | 74.03 | 85.03 | 92.77 | 96.50 | 94.39 | 88.94 | 83.97 | a | 78.39 | 73.41 | a | 58.00 | 79.88 | ||||||||||
2007 | 53.19 | 66.25 | 74.97 | 80.47 | 86.55 | 95.40 | 92.06 | 93.06 | 87.73 | 82.29 | 69.73 | 59.42 | 78.43 | |||||||||||||
2008 | 58.68 | 69.14 | 75.74 | 81.79 | b | 88.10 | 98.73 | 90.13 | 88.90 | 82.47 | 80.45 | 69.10 | 63.77 | 78.92 | ||||||||||||
2009 | 64.42 | 70.64 | 74.74 | 80.37 | 90.13 | 94.07 | 96.81 | 93.26 | 86.37 | 77.71 | 69.97 | 56.39 | 79.57 | |||||||||||||
2010 | 56.61 | 61.07 | 71.42 | 79.93 | 91.10 | 98.07 | 89.53 | n | 94.13 | 88.17 | a | 80.74 | 68.72 | a | 66.63 | a | 77.87 | a | ||||||||
2011 | 59.58 | 63.15 | a | 79.97 | a | 86.07 | b | 89.29 | 98.76 | a | 94.65 | 94.71 | 88.07 | a | 80.45 | 65.23 | 51.97 | 79.32 | ||||||||
2012 | 61.17 | b | 63.83 | 74.06 | 83.33 | 86.35 | 94.47 | 87.74 | 90.23 | 82.87 | 77.71 | 68.30 | ----- | z | 79.10 | a | ||||||||||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.55 | s | ----- | z | 60.50 | 56.45 | 58.48 | j | ||
2015 | 51.26 | 62.57 | 67.77 | 73.57 | 81.32 | 89.73 | 88.52 | 90.00 | 84.57 | 73.32 | 63.03 | 55.58 | 73.44 | |||||||||||||
2016 | 53.16 | 64.97 | 72.23 | 75.60 | 81.87 | a | 89.33 | 91.61 | 83.10 | 81.70 | 77.97 | a | 64.47 | 57.87 | 74.49 | |||||||||||
2017 | 62.23 | 71.93 | 81.97 | 84.70 | 90.06 | 98.77 | 93.61 | 91.94 | 89.60 | 83.16 | 76.40 | 62.65 | 82.25 | |||||||||||||
2018 | 62.48 | 71.11 | 76.52 | 86.07 | 94.55 | 99.10 | 94.71 | 94.16 | 88.90 | 75.23 | 67.67 | 58.84 | 80.78 | |||||||||||||
2019 | 60.84 | 66.86 | 74.42 | 83.00 | 87.87 | 96.40 | 97.68 | 98.03 | 89.53 | 78.29 | 68.13 | 60.23 | 80.11 | |||||||||||||
2020 | 62.39 | 63.86 | 74.42 | 83.47 | 92.71 | 97.40 | 98.23 | 97.94 | 88.03 | 83.81 | 76.27 | 59.77 | 81.52 | |||||||||||||
2021 | 60.23 | 67.50 | 74.61 | 82.53 | 91.58 | 97.27 | 94.19 | 91.74 | 89.90 | 83.13 | 73.17 | 68.10 | 81.16 | |||||||||||||
2022 | 60.97 | 64.14 | 75.03 | 86.80 | 94.42 | 97.00 | 97.23 | 91.39 | 88.73 | 77.19 | 66.70 | 62.55 | 80.18 | |||||||||||||
2023 | 63.26 | 64.68 | 75.16 | 82.93 | 90.48 | 97.70 | 100.39 | 95.39 | 94.23 | 81.94 | 70.23 | 63.16 | 81.63 | |||||||||||||
2024 | 62.55 | 68.55 | 72.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.99 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.95 | 65.92 | 73.69 | 81.64 | 89.59 | 96.17 | 94.73 | 92.55 | 88.05 | 79.80 | 68.55 | 59.31 | 79.22 | |||||||||||||
S.D. | 3.74 | 3.21 | 2.66 | 3.37 | 3.12 | 2.45 | 2.89 | 2.75 | 2.98 | 2.47 | 3.78 | 3.44 | 1.78 | |||||||||||||
SKEW | -0.67 | 0.49 | 0.53 | -0.53 | -0.70 | -0.86 | -0.57 | -0.65 | -0.35 | -0.45 | 0.08 | 0.29 | -1.22 | |||||||||||||
MAX | 65.87 | 72.33 | 81.97 | 87.69 | 95.13 | 100.63 | 100.39 | 98.03 | 94.23 | 83.81 | 76.40 | 68.10 | 82.25 | |||||||||||||
MIN | 51.26 | 60.72 | 67.77 | 73.17 | 81.32 | 89.33 | 87.74 | 83.10 | 81.62 | 73.32 | 60.50 | 51.97 | 73.44 | |||||||||||||
YRS | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 42 | 40 | 37 |