YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.06 | 71.00 | 73.17 | 67.44 | 62.73 | 60.35 | 67.29 | f | ||||||
1940 | 58.15 | 57.90 | 60.32 | 62.60 | 64.77 | 65.20 | 68.40 | 69.10 | 68.72 | 66.47 | 61.10 | 60.77 | 63.62 | |||||||||||||
1941 | 57.56 | 59.93 | 62.02 | 60.88 | 67.23 | 66.45 | 69.44 | 70.77 | 67.97 | 65.53 | 63.43 | 57.52 | 64.06 | |||||||||||||
1942 | 57.71 | 55.57 | 57.90 | 60.20 | 63.32 | 64.87 | 69.60 | 70.10 | 67.75 | 65.94 | 60.97 | 57.47 | 62.62 | |||||||||||||
1943 | 56.92 | 59.70 | 59.98 | 61.05 | 64.98 | 65.15 | 69.06 | 71.19 | 68.68 | 65.74 | 61.70 | 57.82 | 63.50 | |||||||||||||
1944 | 56.34 | 54.59 | 58.73 | 59.52 | 62.82 | 64.15 | 66.73 | 69.31 | 66.88 | 64.58 | 59.80 | 58.21 | 61.80 | |||||||||||||
1945 | 55.27 | 56.79 | 55.81 | 58.35 | 62.63 | 64.95 | 69.05 | 71.87 | 71.38 | 67.35 | 60.03 | 57.26 | 62.56 | |||||||||||||
1946 | 56.10 | 54.39 | a | 57.10 | 62.43 | 63.71 | 67.97 | 70.77 | a | 72.35 | 71.05 | 64.16 | 58.20 | 57.10 | 62.94 | |||||||||||
1947 | 53.50 | 58.54 | 60.76 | 63.00 | c | 63.90 | 66.70 | 69.45 | 70.92 | 71.12 | 66.53 | 58.37 | 55.77 | 63.21 | ||||||||||||
1948 | 55.71 | 54.14 | 55.89 | 61.17 | 62.45 | 64.62 | 66.97 | 68.29 | 68.32 | 64.08 | 59.98 | 53.63 | 61.27 | |||||||||||||
1949 | 47.79 | 52.73 | 56.16 | 61.30 | 62.95 | 67.18 | 69.32 | 70.19 | 69.97 | 64.29 | 64.65 | 54.85 | 61.78 | |||||||||||||
1950 | 52.02 | 55.57 | 58.24 | 60.62 | 61.11 | 64.12 | 69.61 | 68.21 | 67.42 | 66.77 | 62.45 | 59.71 | 62.15 | |||||||||||||
1951 | 55.63 | 55.57 | 58.69 | 60.70 | 62.13 | 65.68 | 69.27 | 68.95 | 67.75 | 66.73 | 61.52 | 55.47 | 62.34 | |||||||||||||
1952 | 54.35 | 57.81 | 55.87 | 59.68 | 64.06 | 63.87 | 68.24 | 70.21 | 70.43 | 65.15 | 59.58 | 56.39 | 62.14 | |||||||||||||
1953 | 59.97 | 56.98 | 57.65 | 58.90 | 62.85 | 64.75 | 70.74 | 69.89 | 68.10 | 67.42 | 63.08 | 57.63 | 63.16 | |||||||||||||
1954 | 55.00 | 61.18 | 57.19 | 60.95 | 62.90 | 65.02 | 71.85 | 71.00 | 69.30 | 64.15 | 63.65 | 58.15 | 63.36 | |||||||||||||
1955 | 53.94 | 55.46 | 59.66 | 59.63 | 61.73 | 64.70 | 68.23 | 72.39 | 71.45 | 63.26 | 60.00 | 57.13 | 62.30 | |||||||||||||
1956 | 55.42 | 53.48 | 58.08 | 58.73 | 64.45 | 66.30 | 69.35 | 69.68 | 72.05 | 65.73 | 64.17 | 59.85 | 63.11 | |||||||||||||
1957 | 56.44 | 60.07 | 59.65 | 60.70 | 63.16 | 68.18 | 71.32 | 73.26 | 70.03 | 65.56 | 60.67 | 61.35 | 64.20 | |||||||||||||
1958 | 59.42 | 60.48 | 57.58 | 63.73 | 65.85 | 67.95 | 70.06 | 72.97 | 72.68 | 70.90 | 61.88 | 61.92 | 65.45 | |||||||||||||
1959 | 59.73 | 57.07 | 63.26 | 64.62 | 64.31 | 68.20 | 73.65 | 73.52 | 71.55 | 67.23 | 65.30 | 60.16 | 65.71 | |||||||||||||
1960 | 54.84 | 56.86 | 59.97 | 62.85 | 64.77 | 66.43 | 71.13 | 71.21 | 72.27 | 65.95 | 60.47 | 56.27 | 63.59 | |||||||||||||
1961 | 60.69 | 59.00 | 58.94 | 61.90 | 61.50 | 64.72 | 70.06 | 72.55 | 69.53 | 66.68 | 60.28 | 56.08 | 63.49 | |||||||||||||
1962 | 56.68 | 56.50 | 55.73 | 61.73 | 62.55 | 63.93 | 68.21 | 70.52 | 68.37 | 64.58 | 59.77 | 56.39 | 62.08 | |||||||||||||
1963 | 55.05 | 61.21 | 57.44 | 58.73 | 63.60 | 64.70 | 68.19 | 72.03 | 74.28 | 68.15 | 61.15 | 58.48 | 63.58 | |||||||||||||
1964 | 55.24 | 56.69 | 57.74 | 60.22 | 60.87 | 63.97 | 69.21 | 70.68 | 67.73 | 68.56 | 59.07 | 55.60 | 62.13 | |||||||||||||
1965 | 55.95 | 55.89 | 58.56 | 60.67 | 62.47 | 63.72 | 67.71 | 71.97 | 68.48 | 69.39 | 60.85 | 55.11 | 62.56 | |||||||||||||
1966 | 53.89 | 54.55 | 58.05 | 61.28 | 63.44 | 66.48 | 69.19 | 72.56 | 69.88 | 67.60 | 61.83 | 57.21 | 63.00 | |||||||||||||
1967 | 55.03 | 57.73 | 59.00 | 56.53 | 63.50 | 63.58 | 70.37 | 73.08 | 72.00 | 68.10 | 64.12 | 55.47 | 63.21 | |||||||||||||
1968 | 57.18 | 60.71 | 60.65 | 62.37 | 63.89 | 65.78 | 71.66 | 72.18 | 71.23 | 66.53 | 61.70 | 54.90 | 64.06 | |||||||||||||
1969 | 58.11 | 54.91 | 56.76 | 61.67 | 62.85 | 65.47 | 69.40 | 72.79 | 69.87 | 66.03 | 64.10 | 59.13 | 63.42 | |||||||||||||
1970 | 56.98 | 59.70 | 60.44 | 60.05 | 63.55 | 65.62 | 70.34 | 72.77 | 69.65 | 66.26 | 61.38 | 55.39 | 63.51 | |||||||||||||
1971 | 54.26 | 55.38 | 57.77 | 60.67 | 61.44 | 64.92 | 69.32 | 75.37 | 72.22 | 65.66 | 59.50 | 54.15 | 62.55 | |||||||||||||
1972 | 54.84 | 57.81 | 60.21 | 62.28 | 64.66 | 67.00 | 72.73 | 72.16 | 68.70 | 65.55 | 59.77 | 57.52 | 63.60 | |||||||||||||
1973 | 55.53 | 59.93 | 58.03 | 61.45 | 63.37 | 67.95 | 69.06 | 70.42 | 68.83 | 66.81 | 60.57 | 58.18 | 63.34 | |||||||||||||
1974 | 56.84 | 58.16 | 59.08 | 61.95 | 63.29 | 66.93 | 71.37 | 70.15 | 70.23 | 66.73 | 62.18 | 56.29 | 63.60 | |||||||||||||
1975 | 56.06 | 56.34 | 57.45 | 58.73 | 62.13 | 65.00 | 69.34 | 68.90 | 71.47 | 65.84 | 60.37 | 56.85 | 62.37 | |||||||||||||
1976 | 58.87 | 59.60 | 60.31 | 60.98 | 65.13 | 69.68 | 71.10 | 72.44 | 73.77 | 71.13 | 66.80 | 60.63 | 65.87 | |||||||||||||
1977 | 60.27 | 61.66 | 57.47 | 61.40 | 61.87 | 65.78 | 71.61 | 73.06 | 72.17 | 68.90 | 64.87 | 63.24 | 65.19 | |||||||||||||
1978 | 60.95 | 60.84 | 64.31 | 63.38 | 68.15 | 71.23 | 71.60 | 72.90 | 73.93 | 70.11 | 61.63 | 55.24 | 66.19 | |||||||||||||
1979 | 56.82 | 56.91 | 60.13 | 63.40 | 65.52 | 70.23 | 71.74 | 73.87 | 76.25 | 68.66 | 62.38 | 60.58 | 65.54 | |||||||||||||
1980 | 61.06 | 63.50 | 61.48 | 63.88 | 63.77 | 68.43 | 72.90 | 74.15 | 70.40 | 67.31 | 62.63 | 60.77 | 65.86 | |||||||||||||
1981 | 61.31 | 62.16 | 61.03 | 64.35 | 67.29 | 72.87 | 75.60 | 75.84 | 73.62 | 67.05 | 63.50 | 60.29 | 67.07 | |||||||||||||
1982 | 56.53 | 60.73 | 60.50 | 63.72 | 65.76 | 66.68 | 71.84 | 73.48 | 73.08 | 70.10 | 62.05 | 57.37 | 65.15 | |||||||||||||
1983 | 60.68 | 60.88 | 61.94 | 62.37 | 66.16 | 68.08 | 72.52 | 77.40 | 76.80 | 72.23 | 64.32 | 60.60 | 67.00 | |||||||||||||
1984 | 61.23 | 60.14 | 63.63 | 64.33 | 68.08 | 69.92 | 77.18 | 76.53 | 78.88 | 68.45 | 61.42 | 56.68 | 67.21 | |||||||||||||
1985 | 57.03 | 57.12 | 58.85 | 63.55 | 64.74 | 68.98 | 75.29 | 72.32 | 69.83 | 67.94 | 60.03 | 57.97 | 64.47 | |||||||||||||
1986 | 60.92 | 58.89 | 60.53 | 62.82 | 64.56 | 67.40 | 69.60 | 71.77 | 66.93 | 65.42 | 62.75 | 57.60 | 64.10 | |||||||||||||
1987 | 55.32 | 57.98 | 59.10 | 63.37 | 64.63 | 65.78 | 67.02 | 69.87 | 69.90 | 69.50 | 61.80 | 53.92 | 63.18 | |||||||||||||
1988 | 56.66 | 59.93 | 61.63 | 62.35 | 63.84 | 64.90 | 70.39 | 71.00 | 70.02 | 66.68 | 60.07 | 56.00 | 63.62 | |||||||||||||
1989 | 54.71 | 56.66 | 59.74 | 65.58 | 63.68 | 65.93 | 70.05 | 70.98 | 70.33 | 66.26 | 63.10 | 58.71 | 63.81 | |||||||||||||
1990 | 56.60 | 55.21 | 58.74 | 63.20 | 64.23 | 68.93 | 72.34 | 71.60 | 71.70 | 68.63 | 62.65 | 55.61 | 64.12 | |||||||||||||
1991 | 57.39 | 59.38 | 56.52 | 61.65 | 62.05 | 64.13 | 67.39 | 68.92 | 69.37 | 67.94 | 62.25 | 57.26 | 62.85 | |||||||||||||
1992 | 57.39 | 61.12 | 60.37 | 66.95 | 67.94 | 68.05 | 71.76 | 74.87 | 72.40 | 68.21 | 62.60 | 55.27 | 65.58 | |||||||||||||
1993 | 56.90 | 57.98 | 61.26 | 63.77 | 66.02 | 68.55 | 69.77 | 70.16 | 69.00 | 67.31 | 61.55 | 57.00 | 64.11 | |||||||||||||
1994 | 57.82 | 56.43 | 60.35 | 60.97 | 62.10 | 68.12 | 69.48 | 74.00 | 72.50 | 66.79 | 56.40 | 55.84 | 63.40 | |||||||||||||
1995 | 56.90 | 61.41 | 60.39 | 61.47 | 62.03 | 64.78 | 68.97 | 71.90 | 71.42 | 67.11 | 63.17 | 58.27 | 63.99 | |||||||||||||
1996 | 57.61 | 58.79 | 60.06 | 64.63 | 66.77 | 67.82 | 70.02 | 72.81 | 70.62 | 64.24 | 61.55 | 57.81 | 64.39 | |||||||||||||
1997 | 57.98 | 58.38 | 61.58 | 62.45 | 68.65 | 67.43 | 69.23 | 72.90 | 75.20 | 68.68 | 63.97 | 57.40 | 65.32 | |||||||||||||
1998 | 58.19 | 57.29 | 59.23 | 59.63 | 62.77 | 65.63 | 68.74 | 72.74 | 70.27 | 65.68 | 59.67 | 55.37 | 62.93 | |||||||||||||
1999 | 57.53 | 57.71 | 58.27 | 58.88 | 60.48 | 62.80 | 68.42 | 68.00 | 66.92 | 68.77 | 60.48 | 57.77 | 62.17 | |||||||||||||
2000 | 58.21 | 58.98 | 58.13 | 62.35 | 64.56 | 68.15 | 69.11 | 72.02 | 70.45 | 65.15 | 58.37 | 58.06 | 63.63 | |||||||||||||
2001 | 54.73 | 54.84 | 58.87 | 58.53 | 63.63 | 67.57 | 68.98 | 69.58 | 68.23 | 66.32 | 61.35 | 55.45 | 62.34 | |||||||||||||
2002 | 55.65 | 57.48 | 57.65 | 59.52 | 61.82 | 64.68 | 67.82 | 68.82 | 70.03 | 64.21 | 63.42 | 56.76 | 62.32 | |||||||||||||
2003 | 61.66 | 59.02 | 60.26 | 59.87 | 62.37 | 64.18 | 70.00 | 72.69 | 69.85 | 67.71 | 60.78 | 56.92 | 63.78 | |||||||||||||
2004 | 56.82 | 56.67 | 62.61 | 64.37 | 68.47 | 67.82 | 72.03 | 70.79 | 72.63 | 65.34 | 60.07 | 57.74 | 64.61 | |||||||||||||
2005 | 58.79 | 59.82 | 60.97 | 61.80 | 65.44 | 66.38 | 69.92 | 71.02 | 68.50 | 65.85 | 62.78 | 58.44 | 64.14 | |||||||||||||
2006 | 57.02 | 58.27 | 57.18 | 61.87 | 64.71 | 70.75 | 76.26 | 73.06 | 70.22 | 65.82 | 63.43 | 56.40 | 64.58 | |||||||||||||
2007 | 54.05 | 57.48 | 59.90 | 59.85 | 62.98 | 65.28 | 69.84 | 73.31 | 69.53 | 66.71 | 61.20 | 54.23 | 62.86 | |||||||||||||
2008 | 54.39 | 55.62 | 58.90 | 61.78 | 63.40 | 66.93 | 69.60 | 72.13 | 71.13 | 69.03 | 64.57 | 56.56 | 63.67 | |||||||||||||
2009 | 59.89 | 57.88 | 59.47 | 62.58 | 64.06 | 66.18 | 70.63 | 72.39 | 72.12 | 65.58 | 61.22 | 56.66 | 64.05 | |||||||||||||
2010 | 58.23 | 58.27 | 60.24 | 60.05 | 62.15 | 63.80 | 65.84 | 68.00 | 68.82 | 67.94 | 62.32 | 58.76 | 62.87 | |||||||||||||
2011 | 60.15 | 57.61 | 60.89 | 63.60 | 64.68 | 65.43 | 69.97 | 69.06 | 68.75 | 65.58 | 60.23 | 55.53 | 63.46 | |||||||||||||
2012 | 58.19 | 57.88 | 58.15 | 61.10 | 63.74 | 65.12 | 68.68 | 73.69 | 74.75 | 69.10 | 62.23 | 57.37 | 64.17 | |||||||||||||
2013 | 55.82 | 56.30 | 60.11 | 61.83 | 65.85 | 66.63 | 70.27 | 70.68 | 71.48 | 65.98 | 63.85 | 59.39 | 64.02 | |||||||||||||
2014 | 61.29 | 61.18 | 64.08 | 65.23 | 69.20 | a | 68.38 | 73.65 | 73.81 | 75.55 | 71.82 | 65.63 | 60.53 | 67.53 | ||||||||||||
2015 | 60.81 | 63.09 | 66.56 | 65.75 | 63.95 | 68.85 | 72.42 | 75.11 | 77.17 | 74.35 | 63.33 | 58.13 | 67.46 | |||||||||||||
2016 | 58.52 | 63.90 | 62.68 | 65.47 | 64.98 | 68.85 | 70.89 | 72.81 | 72.03 | 70.56 | 65.83 | 58.90 | 66.28 | |||||||||||||
2017 | 57.87 | 59.57 | 62.73 | 65.25 | 64.90 | 67.72 | 72.97 | 73.08 | 72.80 | 71.11 | 65.07 | 60.23 | 66.11 | |||||||||||||
2018 | 61.45 | 59.41 | 60.76 | 63.53 | 63.55 | 67.45 | 75.15 | 78.13 | 71.90 | 69.18 | 65.58 | 59.52 | 66.30 | |||||||||||||
2019 | 58.73 | 55.70 | 60.52 | 64.25 | 63.79 | 66.33 | 70.08 | 71.56 | 72.38 | 67.85 | 63.17 | 58.73 | 64.42 | |||||||||||||
2020 | 58.58 | 59.53 | 61.18 | 64.72 | 68.74 | 68.47 | 71.00 | 73.56 | 74.17 | 71.48 | 62.65 | 57.94 | 66.00 | |||||||||||||
2021 | 58.02 | 58.98 | 58.92 | 63.75 | 64.81 | 68.23 | 73.06 | 73.61 | 72.48 | 66.76 | 64.25 | 55.65 | 64.88 | |||||||||||||
2022 | 56.89 | 57.38 | 59.37 | 62.37 | 62.31 | 66.38 | 69.52 | 74.44 | 75.57 | 68.24 | 58.92 | 56.31 | 63.97 | |||||||||||||
2023 | 55.79 | 55.14 | 56.76 | 60.20 | 62.48 | 65.28 | 70.37 | 71.92 | 70.90 | 67.42 | 61.80 | 59.23 | 63.11 | |||||||||||||
2024 | 56.11 | 57.88 | 59.52 | 60.87 | 63.24 | 67.18 | 71.87 | 73.61 | 72.12 | 66.71 | 60.57 | ----- | z | 64.52 | a | |||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.16 | 58.09 | 59.53 | 61.90 | 64.06 | 66.55 | 70.37 | 71.94 | 71.04 | 67.24 | 61.91 | 57.55 | 63.94 | |||||||||||||
S.D. | 2.42 | 2.35 | 2.08 | 2.02 | 1.92 | 1.96 | 2.11 | 2.06 | 2.48 | 2.09 | 1.98 | 1.98 | 1.44 | |||||||||||||
SKEW | -0.40 | 0.16 | 0.55 | 0.04 | 0.80 | 0.57 | 0.89 | 0.34 | 0.70 | 0.80 | 0.04 | 0.40 | 0.69 | |||||||||||||
MAX | 61.66 | 63.90 | 66.56 | 66.95 | 69.20 | 72.87 | 77.18 | 78.13 | 78.88 | 74.35 | 66.80 | 63.24 | 67.53 | |||||||||||||
MIN | 47.79 | 52.73 | 55.73 | 56.53 | 60.48 | 62.80 | 65.84 | 68.00 | 66.88 | 63.26 | 56.40 | 53.63 | 61.27 | |||||||||||||
YRS | 85 | 85 | 85 | 85 | 85 | 85 | 86 | 86 | 86 | 86 | 86 | 85 | 84 |