YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | 89.40 | t | 88.42 | 101.33 | 94.90 | 92.74 | 91.47 | 79.90 | 70.53 | 70.74 | 86.26 | d | ||||||||
1947 | 61.74 | 73.57 | 74.61 | 80.50 | 90.84 | 96.17 | 99.74 | 94.03 | 95.47 | 86.29 | 68.07 | 61.90 | b | 81.91 | ||||||||||||
1948 | 69.16 | 64.93 | 67.32 | 84.93 | a | 91.71 | 98.53 | 99.35 | 94.06 | 94.20 | 83.00 | 71.90 | 65.30 | a | 82.03 | |||||||||||
1949 | 52.20 | f | 64.82 | 73.97 | 83.03 | 88.81 | 96.97 | 95.06 | 96.32 | 93.90 | 81.00 | 82.17 | 65.52 | 83.78 | a | |||||||||||
1950 | 66.52 | 72.32 | 76.90 | a | 85.17 | 88.13 | 98.79 | a | 91.90 | 97.58 | 93.40 | 93.87 | 81.60 | 75.29 | 85.12 | |||||||||||
1951 | 64.87 | 68.61 | 73.14 | b | 79.30 | 89.39 | 96.80 | 98.55 | 94.65 | 97.53 | 86.10 | 72.30 | 63.90 | 82.09 | ||||||||||||
1952 | 65.39 | 65.32 | a | 64.84 | 77.63 | 91.61 | 97.87 | 99.29 | 96.94 | 97.57 | 93.19 | 69.20 | 63.32 | 81.85 | ||||||||||||
1953 | 70.74 | 68.59 | a | 74.35 | 79.10 | a | 83.94 | 99.33 | 96.29 | 97.48 | 98.83 | 86.29 | 77.17 | 65.19 | 83.11 | |||||||||||
1954 | 69.35 | 76.21 | 71.81 | 85.86 | a | 89.10 | 96.67 | 95.32 | 90.97 | 95.20 | 89.06 | 79.93 | a | 71.23 | 84.23 | |||||||||||
1955 | 61.73 | a | 67.79 | 76.26 | 82.41 | a | 88.55 | 98.23 | 95.33 | a | 89.32 | 94.70 | 89.43 | a | 74.47 | 72.74 | 82.58 | |||||||||
1956 | 71.74 | 63.52 | 78.00 | 78.47 | 92.61 | 100.63 | 96.10 | 95.71 | 99.43 | 86.87 | 74.23 | 67.97 | 83.77 | |||||||||||||
1957 | 65.29 | 75.43 | 72.32 | 78.67 | 84.58 | 100.37 | 100.35 | 94.32 | 95.23 | 79.16 | 68.03 | 70.68 | 82.04 | |||||||||||||
1958 | 65.13 | 68.93 | 64.48 | 78.97 | 94.58 | 99.27 | 99.23 | 93.77 | 91.45 | a | 85.13 | 73.50 | 73.90 | a | 82.36 | |||||||||||
1959 | 71.81 | 65.91 | e | 75.14 | c | 83.88 | e | 87.43 | a | 100.07 | 97.83 | b | 89.60 | a | 93.12 | d | 86.70 | k | 72.60 | 65.43 | a | 82.07 | a | |||
1960 | 60.58 | 65.28 | d | 78.07 | c | 82.72 | a | 88.87 | a | 101.54 | d | 99.36 | f | 94.00 | b | 95.12 | d | 82.40 | f | 76.12 | e | 65.00 | h | 82.48 | c | |
1961 | 65.38 | b | 69.27 | f | 73.81 | e | 83.84 | e | 90.31 | b | 100.59 | a | 96.96 | c | 91.81 | d | 90.54 | f | 84.59 | i | 69.54 | d | 62.96 | f | 84.03 | d |
1962 | 63.29 | c | 66.65 | h | 67.07 | d | 86.86 | h | 88.52 | b | 97.28 | a | 97.32 | 100.67 | a | 94.03 | a | 88.50 | g | 77.92 | e | 67.32 | 83.71 | c | ||
1963 | 65.03 | a | 74.30 | a | 74.57 | a | 81.23 | 93.45 | 97.07 | 99.58 | 92.87 | 96.13 | 89.65 | 74.53 | 69.42 | 83.99 | ||||||||||
1964 | 65.10 | 65.66 | 70.27 | a | 78.67 | 90.48 | 96.30 | 97.17 | b | 91.10 | b | 87.53 | 86.52 | 70.70 | 67.65 | 80.59 | ||||||||||
1965 | 69.45 | 67.00 | 71.33 | a | 80.30 | 87.48 | d | 93.90 | 96.52 | 96.73 | a | 90.27 | 89.45 | 77.17 | 63.72 | b | 81.94 | |||||||||
1966 | 62.77 | 61.54 | 76.58 | 82.70 | 91.61 | 97.57 | 97.03 | 91.81 | 88.69 | a | 85.10 | 77.80 | 68.19 | e | 81.78 | |||||||||||
1967 | 71.25 | g | 72.85 | a | 79.31 | b | 79.47 | 88.55 | 94.57 | 94.87 | 94.97 | 93.23 | 88.84 | 79.03 | 61.58 | 84.30 | a | |||||||||
1968 | 65.65 | 72.79 | 70.58 | 78.43 | 89.52 | 98.90 | 95.03 | 90.55 | 93.73 | 89.58 | 73.90 | 68.00 | 82.22 | |||||||||||||
1969 | 70.55 | 67.21 | 70.68 | 84.13 | 90.70 | d | 97.00 | a | 96.81 | 96.48 | 93.40 | 83.13 | 73.73 | 71.20 | f | 83.98 | a | |||||||||
1970 | 67.81 | 72.71 | 70.97 | 78.33 | 92.10 | 98.53 | 98.77 | a | 94.71 | 90.47 | 82.39 | 78.73 | 67.97 | 82.79 | ||||||||||||
1971 | 69.39 | 69.14 | 78.90 | 80.93 | 86.42 | 97.50 | 100.29 | 90.71 | 91.70 | 77.19 | 72.00 | 61.16 | 81.28 | |||||||||||||
1972 | 68.39 | 74.55 | 82.61 | 83.60 | 88.77 | 96.57 | 100.84 | 93.68 | 91.27 | 78.39 | 67.63 | 66.17 | h | 84.21 | a | |||||||||||
1973 | 63.55 | 65.46 | 63.71 | 75.37 | 90.06 | 98.47 | 97.48 | 97.71 | 94.47 | 86.71 | 73.87 | 69.32 | 81.35 | |||||||||||||
1974 | 64.87 | 69.04 | a | 78.03 | a | 83.10 | a | 91.40 | a | 103.83 | a | 95.80 | a | 94.45 | 89.57 | 79.31 | b | 70.62 | a | 61.31 | b | 81.78 | ||||
1975 | 66.36 | f | 67.64 | 71.10 | 75.41 | a | 87.63 | a | 97.63 | 94.52 | 98.00 | 90.52 | a | 83.42 | 73.70 | 65.77 | 82.30 | a | ||||||||
1976 | 67.87 | 71.11 | a | 73.62 | b | 78.72 | a | 88.10 | 99.79 | a | 93.62 | b | 96.80 | a | 89.66 | a | 81.17 | a | 73.86 | b | 67.40 | a | 81.81 | |||
1977 | 63.29 | 72.78 | a | 70.48 | d | 82.21 | a | 86.53 | a | 100.53 | 97.77 | 96.71 | 94.41 | a | 85.13 | 76.73 | 71.07 | a | 83.14 | |||||||
1978 | 66.31 | b | 65.54 | 74.23 | 80.97 | 89.73 | a | 102.27 | 100.47 | a | 95.29 | 92.33 | 86.77 | 70.37 | 62.47 | a | 82.23 | |||||||||
1979 | 58.52 | 68.59 | a | 70.06 | 81.67 | 86.94 | 99.40 | 101.77 | 96.03 | 98.52 | a | 91.26 | 73.10 | 71.87 | a | 83.14 | ||||||||||
1980 | 68.06 | 71.97 | 71.33 | a | 81.80 | 87.13 | 104.34 | a | 102.23 | 96.87 | 95.90 | 85.94 | 77.53 | 75.50 | a | 84.88 | ||||||||||
1981 | 68.52 | 74.07 | 70.84 | 85.30 | 87.90 | 102.70 | 96.87 | 96.03 | 93.07 | 83.65 | 81.14 | a | 75.19 | 84.61 | ||||||||||||
1982 | 67.17 | a | 70.93 | a | 74.76 | b | 83.72 | a | 89.16 | 98.54 | b | 97.47 | a | 96.42 | 93.66 | a | 87.39 | c | 71.97 | 62.71 | 82.82 | |||||
1983 | 66.71 | 67.85 | b | 68.61 | 74.67 | 90.29 | 97.43 | 98.94 | 93.13 | 91.40 | 80.45 | 71.97 | a | 68.55 | 80.83 | |||||||||||
1984 | 66.00 | a | 70.34 | 77.43 | a | 80.40 | 96.06 | 95.93 | 91.83 | a | 90.52 | 91.83 | a | 78.10 | b | 73.47 | 64.76 | b | 81.39 | |||||||
1985 | 62.10 | 67.64 | 73.80 | a | 84.53 | 90.59 | b | 101.97 | 98.23 | 94.84 | 88.67 | 81.74 | 71.50 | 69.69 | b | 82.11 | ||||||||||
1986 | 74.13 | a | 71.54 | 77.45 | 84.43 | 91.90 | 99.78 | c | 93.38 | g | 94.26 | 91.66 | a | 82.97 | 73.52 | a | 65.55 | 82.47 | a | |||||||
1987 | 66.52 | b | 66.78 | a | 71.29 | 81.86 | a | 84.29 | 97.77 | 96.87 | 91.03 | 87.23 | 85.29 | 70.74 | c | 61.58 | 80.10 | |||||||||
1988 | 64.29 | c | 70.29 | a | 73.58 | 78.20 | 87.81 | 97.47 | 94.74 | 90.97 | a | 89.77 | 85.43 | a | 71.64 | b | 64.53 | a | 80.73 | |||||||
1989 | 61.60 | a | 72.89 | 80.14 | b | 88.85 | c | 90.53 | a | 98.46 | f | 99.00 | a | 92.83 | b | 93.85 | c | 80.84 | 72.38 | a | 65.29 | 81.65 | a | |||
1990 | 63.33 | a | 64.78 | a | 73.42 | 81.14 | b | 86.37 | a | 100.68 | b | 90.50 | e | 88.40 | a | 88.22 | c | 84.41 | b | 73.00 | 63.00 | 79.77 | ||||
1991 | 63.31 | b | 71.67 | a | 67.00 | a | 79.07 | a | 86.13 | a | 94.88 | e | 95.52 | b | 92.37 | a | 87.97 | 83.43 | a | 71.00 | 62.04 | e | 79.53 | |||
1992 | 59.83 | b | 67.59 | b | 70.84 | 84.33 | c | 87.29 | c | 96.07 | a | 93.90 | a | 92.10 | a | 92.03 | a | 85.29 | 69.03 | a | 63.03 | a | 80.11 | |||
1993 | 64.36 | c | 63.52 | c | 73.03 | 81.97 | 89.48 | b | 97.47 | 94.53 | a | 92.13 | a | 89.90 | a | 81.16 | 71.65 | d | 66.31 | b | 80.46 | |||||
1994 | 66.84 | 66.71 | 73.38 | b | 80.32 | b | 85.53 | a | 100.10 | a | 98.68 | 95.20 | a | 89.54 | b | 78.93 | d | 65.93 | c | 63.32 | c | 80.37 | ||||
1995 | 61.18 | c | 70.12 | c | 72.20 | a | 77.00 | 82.48 | 94.14 | a | 98.74 | ----- | z | 91.07 | 85.68 | 74.04 | f | 69.36 | f | 81.40 | c | |||||
1996 | 68.53 | a | 70.03 | 74.77 | 83.47 | 93.00 | 98.83 | 97.10 | 93.68 | 86.57 | 81.00 | 73.34 | a | 67.13 | a | 82.29 | ||||||||||
1997 | 61.72 | b | 65.44 | a | 78.94 | 76.83 | 91.35 | 95.00 | 98.81 | 91.84 | 90.14 | a | 79.90 | 72.52 | a | 56.26 | 79.90 | |||||||||
1998 | 64.45 | 59.11 | 68.61 | 72.67 | 84.00 | 93.63 | 93.74 | 92.61 | 91.45 | a | 81.71 | 72.57 | b | 63.87 | a | 78.20 | ||||||||||
1999 | 68.42 | 72.61 | 75.10 | 74.47 | 86.27 | a | 93.24 | a | 91.17 | b | 92.87 | a | 91.50 | 87.45 | 80.46 | b | 64.90 | b | 81.54 | |||||||
2000 | 70.86 | b | 71.93 | b | 72.31 | b | 83.83 | a | 93.10 | b | 94.93 | a | 96.13 | 92.77 | 93.45 | a | 77.77 | 63.37 | 69.30 | a | 81.65 | |||||
2001 | 59.71 | 64.93 | 71.00 | 79.24 | a | 91.39 | 96.37 | 92.68 | 93.21 | c | 93.43 | 83.94 | 74.61 | b | 62.20 | f | 81.86 | a | ||||||||
2002 | 66.23 | 69.11 | 74.00 | 84.03 | 89.06 | 100.00 | 95.83 | a | 93.84 | 91.27 | 79.47 | a | ----- | z | 62.50 | c | 82.30 | a | ||||||||
2003 | 71.80 | a | 66.00 | d | 69.81 | 79.40 | 89.58 | 97.10 | 99.60 | a | 94.06 | 91.73 | 85.77 | a | 69.90 | a | 67.00 | 81.81 | ||||||||
2004 | 63.17 | a | 63.64 | a | 77.94 | 77.87 | 89.23 | 96.62 | a | 95.00 | a | 93.65 | 90.97 | 80.87 | 66.93 | a | 64.53 | a | 80.03 | |||||||
2005 | 65.84 | 63.43 | 69.90 | 79.60 | 89.06 | 96.28 | a | 99.52 | 89.53 | a | 92.40 | 83.26 | 76.14 | a | 68.45 | b | 81.12 | |||||||||
2006 | 68.68 | 72.07 | 69.27 | a | 81.63 | 91.94 | 98.60 | 95.84 | 88.77 | 85.40 | 80.21 | c | 75.94 | l | 63.45 | 81.44 | a | |||||||||
2007 | 59.37 | a | 67.54 | 75.55 | 80.90 | 89.19 | 97.70 | 94.71 | 91.26 | 89.57 | 84.39 | 77.97 | a | 61.67 | a | 80.82 | ||||||||||
2008 | 62.93 | a | 72.25 | q | 74.26 | 81.00 | a | 84.10 | a | 98.53 | 91.00 | 90.70 | d | 89.30 | 84.26 | 75.40 | 63.55 | 81.37 | a | |||||||
2009 | 68.00 | 70.86 | 75.87 | 78.97 | 90.68 | 91.97 | 96.29 | 96.61 | 91.20 | 79.97 | 76.50 | b | 62.03 | 81.58 | ||||||||||||
2010 | 63.94 | 63.07 | 69.30 | a | 77.57 | 84.77 | 96.63 | 95.26 | 91.90 | 92.10 | 82.10 | 70.63 | 70.70 | a | 79.83 | |||||||||||
2011 | 65.35 | 64.68 | 78.32 | 82.27 | 85.35 | 98.63 | 94.23 | 95.43 | a | 92.37 | 84.97 | 70.10 | 59.70 | a | 80.95 | |||||||||||
2012 | 69.35 | 68.46 | a | 74.29 | 83.07 | 89.90 | 98.77 | 92.71 | 94.90 | 88.60 | 85.45 | 76.38 | a | 64.93 | a | 82.24 | ||||||||||
2013 | 60.35 | 61.36 | 77.19 | 80.77 | 86.43 | a | 96.77 | 90.97 | 93.32 | 90.36 | e | 80.71 | 72.47 | 63.71 | c | 79.53 | ||||||||||
2014 | 67.10 | a | 72.14 | 74.00 | 77.70 | 86.94 | 98.40 | 94.03 | 89.00 | 87.17 | a | 84.03 | 71.76 | a | 64.33 | a | 80.55 | |||||||||
2015 | 66.13 | 71.86 | 76.45 | 78.10 | 82.83 | a | 97.90 | 90.48 | 94.35 | 87.40 | 80.84 | 71.34 | a | 62.90 | a | 80.05 | ||||||||||
2016 | 64.00 | 74.55 | 77.52 | 77.90 | 85.10 | b | 97.93 | 96.97 | ----- | z | 85.35 | m | 87.97 | 74.93 | 67.80 | a | 80.47 | b | ||||||||
2017 | 62.76 | b | 70.11 | 80.52 | 82.63 | 87.52 | 100.70 | 93.81 | 92.90 | 89.74 | c | 87.93 | a | 80.54 | b | 66.86 | b | 83.00 | ||||||||
2018 | 70.06 | 68.32 | 73.77 | 84.07 | 89.16 | 95.63 | 92.68 | 89.40 | a | 89.37 | c | 76.41 | b | 70.96 | b | 61.80 | a | 80.14 | ||||||||
2019 | 62.97 | 59.93 | 73.30 | a | 79.45 | a | 80.00 | a | 94.03 | 96.27 | a | 92.93 | b | ----- | z | 79.41 | i | 71.11 | c | 61.36 | c | 77.13 | b | |||
2020 | 65.41 | b | 65.66 | 68.53 | a | 79.43 | 90.57 | a | 96.40 | 96.74 | 97.81 | 92.10 | 88.00 | 76.61 | b | 65.21 | b | 81.87 | ||||||||
2021 | 63.58 | 70.14 | g | 70.00 | 81.73 | 88.13 | 99.83 | 89.04 | g | 90.73 | a | 89.48 | a | 81.72 | b | 79.29 | b | 67.41 | b | 81.19 | b | |||||
2022 | 67.20 | a | 69.38 | b | 74.83 | a | 84.33 | c | 89.41 | b | 95.83 | 95.39 | 90.37 | a | 91.10 | 79.74 | 69.93 | 63.59 | d | 80.93 | ||||||
2023 | 65.29 | 64.11 | 65.27 | a | 82.27 | 88.35 | 95.20 | ----- | z | 96.56 | f | 95.17 | 86.61 | 76.04 | b | 69.30 | a | 78.76 | b | |||||||
2024 | 63.27 | a | 68.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.86 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.62 | 68.47 | 73.23 | 80.82 | 88.67 | 97.93 | 96.31 | 93.58 | 91.94 | 83.98 | 73.53 | 66.01 | 81.66 | |||||||||||||
S.D. | 3.33 | 3.84 | 3.95 | 3.00 | 2.88 | 2.43 | 2.76 | 2.61 | 2.96 | 3.81 | 3.84 | 3.90 | 1.43 | |||||||||||||
SKEW | 0.15 | -0.17 | -0.18 | -0.19 | -0.30 | 0.18 | -0.17 | 0.12 | 0.32 | 0.27 | 0.16 | 0.46 | 0.29 | |||||||||||||
MAX | 74.13 | 76.21 | 82.61 | 88.85 | 96.06 | 104.34 | 102.23 | 100.67 | 99.43 | 93.87 | 82.17 | 75.50 | 85.12 | |||||||||||||
MIN | 58.52 | 59.11 | 63.71 | 72.67 | 80.00 | 91.97 | 90.48 | 88.40 | 85.40 | 76.41 | 63.37 | 56.26 | 78.20 | |||||||||||||
YRS | 75 | 74 | 77 | 76 | 78 | 77 | 74 | 75 | 75 | 73 | 75 | 72 | 57 |