YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 58.21 | 50.55 | 50.60 | 55.87 | 57.79 | 59.42 | 65.81 | 66.68 | 71.35 | 61.33 | d | 60.37 | 50.26 | 59.02 | ||||||||||||
1949 | 43.23 | 48.43 | 50.16 | 58.84 | a | 58.80 | a | 63.13 | 65.37 | 70.18 | 71.38 | 63.56 | 68.83 | 55.26 | 59.77 | |||||||||||
1950 | 49.00 | 55.34 | 54.77 | 58.40 | 55.16 | 60.28 | a | 66.67 | b | 68.55 | 64.53 | 67.60 | 64.37 | 60.45 | 60.43 | |||||||||||
1951 | 53.02 | 52.45 | 54.92 | 53.42 | 56.40 | a | 59.03 | 68.73 | 66.81 | 68.72 | 65.15 | 58.10 | 51.19 | 58.99 | ||||||||||||
1952 | 49.66 | 53.31 | 49.44 | 55.25 | 61.55 | 58.20 | 70.82 | 71.16 | 72.93 | 65.19 | 56.00 | 52.63 | 59.68 | |||||||||||||
1953 | 58.15 | 55.93 | 53.47 | 51.83 | 57.13 | 58.32 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.30 | g | |||||
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 | 51.52 | 61.52 | 53.05 | 54.37 | 57.60 | 60.42 | 69.42 | 70.97 | 74.65 | 64.65 | 59.85 | 59.85 | 61.49 | |||||||||||||
1964 | 53.79 | 56.17 | 53.76 | 54.67 | a | 56.85 | 61.07 | 73.61 | 72.82 | 69.25 | 71.05 | 57.37 | 53.63 | 61.17 | ||||||||||||
1965 | 55.26 | 53.96 | 51.87 | 58.42 | 59.52 | 57.97 | 68.24 | 73.66 | 64.13 | 72.40 | 58.23 | 54.53 | 60.68 | |||||||||||||
1966 | 52.66 | 52.18 | 55.72 | a | 58.84 | a | 58.26 | 64.30 | 69.97 | 71.69 | 67.97 | 67.00 | 58.83 | 57.08 | 61.21 | |||||||||||
1967 | 58.35 | 61.27 | 52.29 | 47.62 | 57.76 | b | 57.52 | 71.94 | 75.13 | 68.00 | 70.37 | 61.82 | 52.13 | 61.18 | ||||||||||||
1968 | 54.06 | 58.05 | 56.02 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.06 | j | ||
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.10 | f | 66.44 | 71.11 | 68.53 | 59.47 | 55.55 | b | 58.61 | 63.29 | f | |||||
2001 | 52.31 | 50.98 | 54.19 | 53.25 | 61.98 | 66.74 | a | 64.55 | a | 69.79 | 68.02 | 64.26 | 58.48 | 52.94 | 59.79 | |||||||||||
2002 | 53.94 | 58.00 | 53.35 | 54.39 | b | 57.76 | 62.63 | 67.08 | 67.10 | 72.00 | 59.13 | 61.59 | a | 53.13 | a | 60.01 | ||||||||||
2003 | 62.12 | a | 53.50 | a | 56.88 | a | 53.73 | 58.87 | a | 60.82 | 71.83 | a | 73.55 | 69.13 | 70.05 | 56.28 | 53.98 | 61.73 | ||||||||
2004 | 53.77 | a | 51.53 | 60.58 | 57.25 | b | 62.72 | a | 60.92 | 67.53 | 66.39 | 70.45 | 60.84 | 55.30 | 55.05 | 60.19 | ||||||||||
2005 | 55.21 | 52.98 | 54.66 | 56.42 | 60.60 | 59.75 | 69.42 | 68.45 | 65.00 | 61.84 | 61.83 | 55.87 | 60.17 | |||||||||||||
2006 | 54.73 | 57.46 | 48.98 | 53.33 | 59.03 | 67.71 | a | 75.44 | 69.13 | e | 70.32 | 62.63 | 63.07 | 57.34 | 61.60 | |||||||||||
2007 | 53.76 | 55.04 | 59.34 | 56.85 | 58.72 | f | 63.72 | 68.58 | 71.32 | 66.68 | 64.23 | 60.05 | 52.03 | 61.05 | a | |||||||||||
2008 | 51.89 | 53.67 | 57.39 | 57.12 | b | 57.33 | b | 64.77 | d | 67.82 | 69.84 | 70.62 | 71.05 | 64.45 | 52.77 | 61.56 | ||||||||||
2009 | 60.19 | 53.64 | 54.52 | 56.68 | 60.95 | 60.40 | 70.26 | 70.73 | 73.48 | 64.02 | 61.28 | 53.04 | c | 61.60 | ||||||||||||
2010 | 56.15 | 53.62 | 55.35 | 52.90 | 57.06 | 59.65 | 63.08 | 68.63 | a | 69.87 | 60.26 | d | 57.73 | 54.87 | a | 59.10 | ||||||||||
2011 | 57.05 | 51.02 | 53.77 | a | 56.78 | 58.65 | 59.78 | a | 67.65 | 70.16 | 67.90 | 66.53 | 57.96 | c | 55.26 | 60.21 | ||||||||||
2012 | 59.89 | 54.62 | a | 53.83 | a | 58.33 | 61.07 | b | 61.85 | 66.60 | 75.63 | 74.97 | 67.31 | 60.57 | 52.77 | 62.29 | ||||||||||
2013 | 54.19 | 53.64 | 58.02 | 58.17 | d | 61.85 | a | 64.58 | 67.53 | 70.23 | 71.60 | 62.98 | 61.13 | 58.29 | 61.85 | |||||||||||
2014 | 62.71 | 57.54 | 57.94 | 60.38 | 63.20 | c | 62.50 | 69.11 | 68.71 | 72.40 | 68.15 | 62.46 | e | 55.82 | 63.41 | |||||||||||
2015 | 59.53 | 59.88 | 63.68 | 60.40 | 56.84 | 66.33 | 66.06 | 71.56 | 73.17 | 70.56 | 59.77 | 54.53 | 63.53 | |||||||||||||
2016 | 53.26 | 63.83 | 57.18 | 60.72 | a | 56.69 | 65.56 | c | 68.69 | 69.32 | 68.98 | a | 65.95 | 66.07 | c | 55.08 | 62.61 | |||||||||
2017 | 53.13 | 53.64 | 61.60 | 62.68 | k | 60.18 | a | 67.48 | a | 71.90 | 71.27 | 69.95 | 70.87 | 64.17 | 62.56 | 64.25 | a | |||||||||
2018 | 61.52 | 57.09 | 55.98 | 59.03 | a | 57.84 | 63.13 | 74.10 | 71.67 | a | 67.53 | 66.13 | 62.65 | 55.84 | 62.71 | |||||||||||
2019 | 54.87 | 48.79 | 54.80 | a | 58.87 | 55.82 | 61.12 | a | 69.47 | b | 72.20 | a | 71.62 | a | 68.56 | 61.85 | c | 55.05 | a | 61.08 | ||||||
2020 | 56.34 | 57.12 | 53.55 | 58.84 | a | 63.58 | a | 63.93 | a | 67.84 | 73.71 | 76.15 | 72.44 | 62.22 | 58.12 | c | 63.65 | |||||||||
2021 | 58.03 | 56.50 | 53.73 | 58.80 | 58.30 | c | 65.63 | 69.62 | k | 70.81 | b | 69.32 | 63.84 | i | 65.18 | 52.43 | a | 60.87 | b | |||||||
2022 | 58.13 | 59.18 | 59.53 | 57.38 | e | 59.47 | 71.53 | m | 67.82 | 73.39 | 74.55 | 65.56 | 58.22 | 55.21 | 62.59 | a | ||||||||||
2023 | 52.53 | 52.70 | 50.87 | 56.93 | 56.08 | 58.20 | 74.81 | 72.40 | 65.65 | 69.42 | 64.29 | a | 59.08 | 61.08 | ||||||||||||
2024 | 55.74 | 53.16 | 54.60 | 57.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.24 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.22 | 54.95 | 54.98 | 56.52 | 58.87 | 62.14 | 68.91 | 70.73 | 70.02 | 66.08 | 60.76 | 55.20 | 61.10 | |||||||||||||
S.D. | 3.94 | 3.52 | 3.37 | 2.83 | 2.25 | 2.94 | 2.92 | 2.32 | 3.03 | 3.83 | 3.22 | 2.82 | 1.32 | |||||||||||||
SKEW | -0.42 | 0.47 | 0.52 | -0.96 | 0.51 | 0.29 | 0.48 | 0.03 | -0.00 | -0.05 | 0.29 | 0.64 | 0.26 | |||||||||||||
MAX | 62.71 | 63.83 | 63.68 | 60.72 | 63.58 | 67.71 | 75.44 | 75.63 | 76.15 | 72.44 | 68.83 | 62.56 | 63.65 | |||||||||||||
MIN | 43.23 | 48.43 | 48.98 | 47.62 | 55.16 | 57.52 | 63.08 | 66.39 | 64.13 | 59.13 | 55.30 | 50.26 | 58.99 | |||||||||||||
YRS | 36 | 36 | 35 | 34 | 33 | 32 | 33 | 34 | 34 | 33 | 34 | 34 | 29 |