YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 102.93 | 107.94 | 105.94 | 100.70 | 91.61 | 79.50 | 69.16 | 93.97 | e | |||||||
1934 | 69.35 | 74.86 | 86.52 | 90.47 | 99.45 | 99.33 | 107.35 | 100.81 | 98.70 | 91.58 | 75.23 | 67.77 | 88.45 | |||||||||||||
1935 | 64.39 | 68.96 | 69.52 | 82.63 | 87.81 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.66 | g | |||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | 67.14 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.57 | 69.94 | 71.88 | i | |||
1938 | 68.71 | 68.32 | 72.10 | 84.10 | 91.19 | 100.93 | 103.71 | 102.35 | 100.17 | 86.68 | 71.43 | 69.03 | 84.89 | |||||||||||||
1939 | 64.52 | 60.14 | 77.48 | 87.60 | 95.77 | 103.03 | ----- | z | 103.61 | 94.20 | ----- | z | ----- | z | ----- | z | 85.80 | d | ||||||||
1940 | ----- | z | ----- | z | 79.77 | ----- | z | 98.35 | 105.77 | 107.94 | 105.35 | 98.73 | 87.81 | 73.37 | 68.13 | 91.69 | c | |||||||||
1941 | 65.45 | 69.04 | 71.58 | 75.90 | 90.97 | 98.63 | 104.00 | 100.94 | 95.62 | a | 81.42 | 77.47 | 65.90 | 83.08 | ||||||||||||
1942 | 68.06 | 67.21 | 74.94 | 80.97 | 93.23 | a | 103.33 | 107.84 | 102.68 | 100.97 | 86.81 | 79.47 | 70.74 | 86.35 | ||||||||||||
1943 | 66.23 | 74.39 | 78.81 | 88.73 | 95.87 | 100.93 | 106.97 | 99.52 | 101.27 | 87.60 | a | 78.80 | 65.26 | 87.03 | ||||||||||||
1944 | 65.58 | 64.28 | 71.58 | 79.90 | 91.06 | 98.40 | 105.39 | 105.94 | 98.03 | 90.48 | 70.33 | 67.29 | 84.02 | |||||||||||||
1945 | 64.03 | 69.32 | ----- | z | ----- | z | ----- | z | ----- | z | 106.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.81 | i | |||
1946 | ----- | z | 69.93 | 78.10 | 90.20 | 93.71 | 105.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 87.54 | g | |||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.94 | 63.94 | k | |
1948 | 69.68 | 67.10 | 70.55 | 87.00 | 95.45 | 102.80 | 106.97 | 105.97 | 102.00 | 89.10 | 72.97 | 64.39 | 86.16 | |||||||||||||
1949 | 53.94 | 67.18 | 75.23 | 87.83 | 93.39 | 101.30 | 103.29 | 104.00 | 99.47 | 83.74 | 82.20 | 66.03 | 84.80 | |||||||||||||
1950 | 64.61 | 74.86 | 79.29 | 90.23 | 94.13 | 103.67 | 103.32 | 107.32 | 97.97 | 96.77 | 82.03 | 75.45 | 89.14 | |||||||||||||
1951 | 67.06 | 69.82 | 76.32 | 82.23 | 92.71 | 100.30 | 106.61 | 99.42 | 98.97 | 87.81 | 72.83 | 64.81 | 84.91 | |||||||||||||
1952 | 65.03 | 69.17 | 67.94 | 80.93 | 96.10 | 101.67 | 104.06 | 103.71 | 100.40 | 95.35 | 70.47 | 64.65 | 84.96 | |||||||||||||
1953 | 69.52 | 68.07 | 75.52 | 80.60 | 85.61 | 100.93 | 102.03 | 102.26 | 100.93 | 87.03 | 76.57 | 64.35 | 84.45 | |||||||||||||
1954 | 66.06 | 76.32 | 71.00 | 87.10 | 93.32 | 99.70 | 102.74 | 99.94 | 99.10 | 90.03 | 80.00 | 67.84 | 86.10 | |||||||||||||
1955 | 59.00 | 64.89 | 76.23 | 81.77 | 89.42 | 99.43 | 99.13 | 97.03 | 97.67 | 90.90 | 73.33 | 70.10 | 83.24 | |||||||||||||
1956 | 69.10 | 63.48 | 78.19 | 80.03 | 92.03 | 101.37 | 99.87 | 99.26 | 99.77 | 84.61 | 74.00 | 68.32 | 84.17 | |||||||||||||
1957 | 62.97 | 73.21 | 74.19 | 80.13 | 85.97 | 101.67 | 103.13 | 99.19 | 97.87 | 81.10 | 68.63 | 68.81 | 83.07 | |||||||||||||
1958 | 67.26 | 69.71 | 67.26 | 80.57 | 96.39 | 103.60 | 106.87 | 104.06 | 98.73 | 88.06 | 73.60 | 69.90 | 85.50 | |||||||||||||
1959 | 66.97 | 65.89 | 77.87 | 87.60 | 90.32 | 104.73 | 106.00 | 98.48 | 95.77 | 86.03 | 72.63 | 63.19 | 84.62 | |||||||||||||
1960 | 58.77 | 63.38 | 78.87 | 84.80 | 92.58 | 105.07 | 105.29 | 101.48 | 99.23 | 81.87 | 73.43 | 64.29 | 84.09 | |||||||||||||
1961 | 68.68 | 71.18 | 74.45 | 86.30 | 92.97 | 105.27 | 105.35 | 101.77 | 94.50 | 85.74 | 70.83 | 64.03 | 85.09 | |||||||||||||
1962 | 63.26 | 67.46 | 70.87 | 90.63 | 90.58 | 101.67 | 105.06 | 107.32 | 97.47 | 88.29 | 77.43 | 68.65 | 85.72 | |||||||||||||
1963 | 62.13 | 74.96 | 76.35 | 81.93 | 97.48 | 99.23 | 106.29 | 98.71 | 99.10 | 90.29 | 73.33 | 66.81 | 85.55 | |||||||||||||
1964 | 61.00 | 65.07 | 71.10 | 80.80 | 90.90 | 99.50 | 104.10 | 98.61 | 94.23 | 90.19 | 69.30 | 64.10 | 82.41 | |||||||||||||
1965 | 64.03 | 65.32 | 69.32 | 77.13 | 89.19 | 97.33 | 105.29 | 104.13 | 94.67 | 91.97 | 76.27 | 64.45 | 83.26 | |||||||||||||
1966 | 61.90 | 63.54 | 77.94 | 87.80 | 97.13 | 103.40 | 106.52 | 103.55 | 95.07 | 87.74 | 76.20 | 67.00 | 85.65 | |||||||||||||
1967 | 67.23 | 72.89 | 78.55 | 77.17 | 91.55 | 96.00 | 103.61 | 103.19 | 97.97 | 89.26 | 78.40 | 59.55 | 84.61 | |||||||||||||
1968 | 65.65 | 72.21 | 73.84 | 82.63 | 93.68 | 104.10 | 103.32 | 99.19 | 99.37 | 89.06 | 73.00 | 63.35 | 84.95 | |||||||||||||
1969 | 66.13 | 66.18 | 72.55 | 84.67 | 94.65 | 99.40 | 104.94 | 106.10 | 99.00 | 83.58 | 74.00 | 67.55 | 84.89 | |||||||||||||
1970 | 66.52 | 74.71 | 72.58 | 80.57 | 95.87 | 103.03 | 106.71 | 104.13 | 95.13 | 83.65 | 76.40 | 66.16 | 85.46 | |||||||||||||
1971 | 68.13 | 71.00 | 79.97 | 81.43 | 87.61 | 101.00 | 107.29 | 100.48 | 98.97 | 81.68 | 73.63 | 61.10 | 84.36 | |||||||||||||
1972 | 67.16 | 75.14 | 86.68 | 86.77 | 93.26 | 101.20 | 106.77 | 102.16 | 98.47 | 81.13 | 70.27 | 64.19 | 86.10 | |||||||||||||
1973 | 63.45 | 68.50 | 67.42 | 81.67 | 96.55 | 103.97 | 106.48 | 106.10 | 100.60 | 91.55 | 74.77 | 70.10 | 85.93 | |||||||||||||
1974 | 66.29 | 72.36 | 77.84 | 86.60 | 96.00 | 108.60 | 104.65 | 104.87 | 99.43 | 87.16 | 74.90 | 63.45 | 86.85 | |||||||||||||
1975 | 66.39 | 68.00 | 71.97 | 76.60 | 92.39 | 102.83 | 106.10 | 105.97 | 99.17 | 87.29 | 75.43 | 66.81 | 84.91 | |||||||||||||
1976 | 69.13 | 72.52 | 74.71 | 82.33 | 94.52 | 101.87 | 102.10 | 103.10 | 93.80 | 85.39 | 77.00 | 68.42 | 85.41 | |||||||||||||
1977 | 64.77 | 76.71 | 74.35 | 88.23 | 88.97 | 105.40 | 106.06 | 105.06 | 98.97 | 91.00 | 79.40 | 71.55 | 87.54 | |||||||||||||
1978 | 66.65 | 68.57 | 76.97 | 83.37 | 93.58 | 107.53 | 108.29 | 105.10 | 98.63 | 91.97 | 72.47 | 62.77 | 86.32 | |||||||||||||
1979 | 59.23 | 68.96 | 73.10 | 86.30 | 91.97 | 104.63 | 108.10 | 102.55 | 103.80 | 91.29 | 71.83 | 69.87 | 85.97 | |||||||||||||
1980 | 65.84 | 71.38 | 71.65 | 83.33 | 88.58 | 104.10 | 107.65 | 102.90 | 100.17 | 88.71 | 78.17 | 74.94 | 86.45 | |||||||||||||
1981 | 70.42 | 74.61 | 75.06 | 88.80 | 92.26 | 105.97 | 105.61 | 106.84 | 100.80 | 85.74 | 79.70 | 70.68 | 88.04 | |||||||||||||
1982 | 64.61 | 70.71 | 72.94 | 85.43 | 93.61 | 102.27 | 105.32 | 104.06 | 98.07 | 87.68 | 71.67 | 63.68 | 85.00 | |||||||||||||
1983 | 67.32 | 67.86 | 72.19 | 78.33 | 94.97 | 102.50 | 107.16 | 103.77 | 101.30 | 87.42 | 73.10 | 67.61 | 85.30 | |||||||||||||
1984 | 69.84 | 73.93 | 81.65 | 83.20 | 101.16 | 102.60 | 103.06 | 101.94 | 99.17 | 83.29 | 73.73 | 62.74 | 86.36 | |||||||||||||
1985 | 64.23 | 69.29 | 73.81 | 88.23 | 96.42 | 106.17 | 106.74 | 105.81 | 93.90 | 86.19 | 72.13 | 67.58 | 85.87 | |||||||||||||
1986 | 74.19 | 72.07 | 81.42 | 86.80 | 95.48 | 105.73 | 103.81 | 105.48 | 95.67 | 86.74 | 76.43 | 67.10 | 87.58 | |||||||||||||
1987 | 66.32 | 70.32 | 75.52 | 91.37 | 94.45 | 106.43 | 106.42 | 103.90 | 98.87 | 92.55 | 74.43 | 62.45 | 86.92 | |||||||||||||
1988 | 65.68 | 74.97 | 79.77 | 85.90 | 94.58 | 106.33 | 107.48 | 104.74 | 99.80 | 94.52 | 75.80 | 66.74 | 88.03 | |||||||||||||
1989 | 65.87 | 74.07 | 83.48 | 94.17 | 96.74 | 105.87 | 109.81 | 105.29 | 102.77 | 89.74 | 79.70 | 69.45 | 89.75 | |||||||||||||
1990 | 67.26 | 68.07 | 78.87 | 88.40 | 93.71 | 107.83 | 104.65 | 102.03 | 99.03 | 91.77 | 78.13 | 64.65 | 87.03 | |||||||||||||
1991 | 66.39 | 78.71 | 70.97 | 85.47 | 92.94 | 100.60 | 106.42 | 105.32 | 99.70 | 92.23 | 74.53 | 66.29 | 86.63 | |||||||||||||
1992 | 66.26 | 72.14 | 75.32 | 90.37 | 94.94 | 103.10 | 104.58 | 103.48 | 102.93 | 92.52 | 73.53 | 62.87 | 86.84 | |||||||||||||
1993 | 66.61 | 66.79 | 77.58 | 86.80 | 96.26 | 102.97 | 104.65 | 102.94 | 100.33 | 87.84 | 72.60 | 67.81 | 86.10 | |||||||||||||
1994 | 69.45 | 69.18 | 76.58 | 84.40 | 91.29 | 105.87 | 105.84 | 105.87 | 98.63 | 84.84 | 68.90 | 65.03 | 85.49 | |||||||||||||
1995 | 63.13 | 74.54 | 75.90 | 80.97 | 88.10 | 99.97 | 107.26 | 106.06 | 100.30 | 90.58 | 78.63 | 68.32 | 86.15 | |||||||||||||
1996 | 68.58 | 73.03 | 77.39 | 87.27 | 96.29 | 105.50 | 106.19 | 104.71 | 94.47 | 86.65 | 76.47 | 68.16 | 87.06 | |||||||||||||
1997 | 64.90 | 69.00 | 83.13 | 82.17 | 98.84 | 100.43 | 106.00 | 103.13 | 100.40 | 86.55 | 75.57 | 62.68 | 86.07 | |||||||||||||
1998 | 66.68 | 62.46 | 72.90 | 78.57 | 88.55 | 98.70 | 105.84 | 105.61 | 99.17 | 86.06 | 74.80 | 65.55 | 83.74 | |||||||||||||
1999 | 69.39 | 72.93 | 77.32 | 77.77 | 92.29 | 100.50 | 101.58 | 103.94 | 98.80 | 93.03 | 81.93 | 67.23 | 86.39 | |||||||||||||
2000 | 70.10 | 72.48 | 73.74 | 88.30 | 98.13 | 103.03 | 106.52 | 102.61 | 101.70 | 82.32 | 67.40 | 69.48 | 86.32 | |||||||||||||
2001 | 63.71 | 67.71 | 77.48 | 83.67 | 100.39 | 105.07 | 104.94 | 105.45 | 104.63 | 91.35 | 78.83 | 64.13 | 87.28 | |||||||||||||
2002 | 67.06 | 74.82 | 78.13 | 89.17 | 95.16 | 107.27 | 107.19 | 106.19 | 101.37 | 86.23 | 78.47 | 65.00 | 88.00 | |||||||||||||
2003 | 74.61 | 68.46 | 76.19 | 82.37 | 95.94 | 105.00 | 108.68 | 104.52 | 102.23 | 94.65 | 72.13 | 68.10 | 87.74 | |||||||||||||
2004 | 67.65 | 66.24 | 84.97 | 84.43 | 96.52 | 104.53 | 105.97 | 103.77 | 99.87 | 86.13 | 70.50 | 66.39 | 86.41 | |||||||||||||
2005 | 66.55 | 67.04 | 74.13 | 85.00 | 95.13 | 103.13 | 109.48 | 102.77 | 101.47 | 89.61 | 78.43 | 68.94 | 86.81 | |||||||||||||
2006 | 70.42 | 74.79 | 72.61 | 84.87 | 97.94 | 107.40 | 106.65 | 102.97 | 96.57 | 87.39 | 79.60 | 65.19 | 87.20 | |||||||||||||
2007 | 63.61 | 71.32 | 81.61 | 86.17 | 97.03 | 105.80 | 106.84 | 106.26 | 101.17 | 90.42 | 81.77 | 62.87 | 87.91 | |||||||||||||
2008 | 64.32 | 68.55 | 79.48 | 87.13 | 90.71 | 106.73 | 105.74 | 103.90 | 100.87 | 90.74 | 78.80 | 65.45 | 86.87 | |||||||||||||
2009 | 70.48 | 72.43 | 79.61 | 84.17 | 98.45 | 100.00 | 109.45 | 107.16 | 101.73 | 86.35 | 80.17 | 63.94 | 87.83 | |||||||||||||
2010 | 67.71 | 68.64 | 73.58 | 82.53 | 91.32 | 104.60 | 106.58 | 104.65 | 104.10 | 88.74 | 74.70 | 70.42 | 86.46 | |||||||||||||
2011 | 67.77 | 67.43 | 80.77 | 86.27 | 91.45 | 104.27 | 106.94 | 108.97 | 103.27 | 91.32 | 74.10 | 63.00 | 87.13 | |||||||||||||
2012 | 70.90 | 72.48 | 79.23 | 87.60 | 98.16 | 106.50 | 104.61 | 105.77 | 99.20 | 91.32 | 81.23 | 66.84 | 88.65 | |||||||||||||
2013 | 64.90 | 68.29 | 82.94 | 88.40 | 96.00 | 108.40 | 105.68 | 105.26 | 99.50 | 87.13 | 77.40 | 67.61 | 87.63 | |||||||||||||
2014 | 73.06 | 76.82 | 81.26 | 87.37 | 95.52 | 106.23 | 107.06 | 102.29 | 99.20 | 91.77 | 78.30 | 67.19 | 88.84 | |||||||||||||
2015 | 69.23 | 77.50 | 84.74 | 86.80 | 90.13 | 105.93 | 105.13 | 107.68 | 100.33 | 90.00 | 73.37 | 65.39 | 88.02 | |||||||||||||
2016 | 66.39 | 79.90 | 82.35 | 85.37 | 91.97 | 107.43 | 108.26 | 102.87 | 97.50 | 93.35 | 77.93 | 68.35 | 88.47 | |||||||||||||
2017 | 64.06 | 72.21 | 83.90 | 88.63 | 94.55 | 107.93 | 106.16 | 105.42 | 99.30 | 93.84 | 82.87 | 70.97 | 89.15 | |||||||||||||
2018 | 73.90 | 71.07 | 78.81 | 90.60 | 96.55 | 105.40 | 107.55 | 104.97 | 103.50 | 83.03 | 75.43 | 66.48 | 88.11 | |||||||||||||
2019 | 67.00 | 63.61 | 76.84 | 87.87 | 87.84 | 104.03 | 108.23 | 108.19 | 99.53 | 88.71 | 77.77 | 65.26 | 86.24 | |||||||||||||
2020 | 68.61 | 70.90 | 74.52 | 87.37 | 99.68 | 104.97 | 109.84 | 110.74 | 104.07 | 94.97 | 80.50 | 67.87 | 89.50 | |||||||||||||
2021 | 67.87 | 73.04 | 76.58 | 90.00 | 96.23 | 108.20 | 103.65 | 103.23 | 100.07 | 86.81 | 83.27 | 69.19 | 88.18 | |||||||||||||
2022 | 69.55 | 71.71 | 79.94 | 90.07 | 97.61 | 106.50 | 107.48 | 103.48 | 101.70 | 87.97 | 72.27 | 65.03 | 87.78 | |||||||||||||
2023 | 63.39 | 68.14 | 72.19 | 88.03 | 95.97 | 103.30 | 114.68 | 109.52 | 103.40 | 94.19 | 80.60 | 71.65 | 88.75 | |||||||||||||
2024 | 66.13 | 72.14 | 76.39 | 86.77 | 96.74 | 109.43 | 112.32 | 109.35 | 106.63 | 97.87 | 76.33 | 75.13 | 90.44 | |||||||||||||
2025 | 68.95 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.46 | 70.29 | 76.38 | 85.01 | 93.91 | 103.51 | 105.99 | 103.92 | 99.44 | 88.65 | 75.74 | 66.79 | 86.34 | |||||||||||||
S.D. | 3.34 | 3.92 | 4.32 | 3.90 | 3.36 | 2.91 | 2.34 | 2.68 | 2.61 | 3.70 | 3.65 | 3.02 | 1.68 | |||||||||||||
SKEW | -0.49 | -0.02 | 0.19 | -0.32 | -0.31 | -0.23 | 0.22 | -0.19 | -0.12 | 0.02 | 0.00 | 0.47 | -0.00 | |||||||||||||
MAX | 74.61 | 79.90 | 86.68 | 94.17 | 101.16 | 109.43 | 114.68 | 110.74 | 106.63 | 97.87 | 83.27 | 75.45 | 90.44 | |||||||||||||
MIN | 53.94 | 60.14 | 67.26 | 75.90 | 85.61 | 96.00 | 99.13 | 97.03 | 93.80 | 81.10 | 67.40 | 59.55 | 82.41 | |||||||||||||
YRS | 86 | 88 | 87 | 86 | 87 | 87 | 86 | 86 | 86 | 85 | 86 | 87 | 83 |