YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1944 | 51.43 | d | 50.90 | 57.78 | a | 63.55 | j | 72.90 | 76.73 | 86.55 | a | 88.47 | 82.29 | a | 72.32 | 56.33 | 53.47 | 68.11 | a | |||||||
1945 | 50.92 | 54.91 | 55.15 | a | 63.40 | 72.11 | 77.17 | 87.92 | 86.88 | a | 81.67 | 72.90 | 59.35 | 52.31 | 67.89 | |||||||||||
1946 | 50.95 | 53.14 | 60.50 | 71.80 | 71.65 | 83.18 | 87.32 | 87.34 | 83.83 | 65.30 | a | 54.88 | 54.71 | 68.72 | ||||||||||||
1947 | 50.11 | 58.43 | 59.85 | 65.09 | a | 74.31 | b | 78.45 | 89.44 | 85.00 | 83.72 | 71.44 | 55.57 | 50.02 | 68.45 | |||||||||||
1948 | 52.63 | 52.05 | 54.40 | 67.73 | 71.60 | 78.88 | 86.74 | 87.53 | 83.17 | 72.05 | 55.47 | 51.16 | 67.78 | |||||||||||||
1949 | 43.22 | a | 51.64 | 58.24 | 68.07 | 71.02 | 81.67 | 87.05 | 85.21 | 85.30 | 68.63 | 65.37 | 51.71 | 68.09 | ||||||||||||
1950 | 50.29 | 59.05 | 62.29 | 69.48 | 71.40 | 80.52 | 85.77 | 87.31 | 78.57 | 77.03 | 65.85 | 59.43 | d | 70.58 | ||||||||||||
1951 | 52.90 | 55.71 | 60.42 | 65.97 | 73.95 | a | 80.12 | 88.79 | 85.66 | i | 83.30 | 72.84 | 58.97 | 51.89 | 67.71 | a | ||||||||||
1952 | 51.47 | 54.07 | 53.81 | 65.59 | c | 78.06 | 80.23 | 87.74 | 88.56 | 85.15 | 76.69 | 56.13 | 50.11 | 68.97 | ||||||||||||
1953 | 57.11 | 54.02 | 60.58 | a | 64.88 | b | 69.21 | 81.77 | 88.27 | 87.15 | 83.82 | b | 73.16 | 64.02 | a | 52.48 | 69.71 | |||||||||
1954 | 54.00 | 62.68 | 59.98 | 70.77 | 75.21 | 81.26 | a | 88.19 | 85.24 | 83.79 | a | 73.37 | 63.05 | 54.07 | a | 70.97 | ||||||||||
1955 | 48.95 | 51.59 | 60.81 | 65.27 | 71.21 | 80.72 | a | 84.27 | 84.42 | 82.35 | 75.60 | 59.90 | 55.74 | 68.40 | ||||||||||||
1956 | 56.61 | 50.83 | 63.26 | 65.13 | 76.16 | 85.48 | 86.37 | a | 85.19 | 86.12 | 70.87 | a | 62.10 | 55.35 | 70.29 | |||||||||||
1957 | 54.31 | 62.93 | 60.89 | 65.19 | a | 69.66 | 84.40 | 90.42 | a | 87.32 | 84.23 | f | 70.15 | 56.42 | 56.27 | 68.90 | a | |||||||||
1958 | 53.13 | 58.14 | 56.60 | a | 66.26 | a | 78.66 | 83.93 | 88.06 | 86.79 | 81.78 | 74.23 | 60.65 | 57.89 | 70.51 | |||||||||||
1959 | 56.79 | 53.50 | 62.66 | 70.88 | 70.73 | 85.10 | 89.84 | 83.71 | 78.30 | 71.97 | 62.70 | 53.11 | 69.94 | |||||||||||||
1960 | 48.74 | 51.91 | a | 63.13 | 67.38 | 73.15 | 86.17 | 89.76 | 88.32 | 84.33 | 70.79 | 61.83 | 51.77 | 69.77 | ||||||||||||
1961 | 54.76 | 57.64 | 59.94 | 68.25 | 72.69 | 84.83 | 88.55 | 85.74 | 79.32 | 70.84 | 57.80 | 52.95 | 69.44 | |||||||||||||
1962 | 51.87 | 56.27 | 55.18 | a | 70.98 | 71.85 | 80.77 | 87.79 | 91.02 | 83.77 | 71.50 | 63.95 | 56.06 | 70.08 | ||||||||||||
1963 | 50.29 | 61.32 | 58.84 | 64.42 | 75.52 | 77.05 | 89.47 | 85.61 | 84.12 | 74.55 | 59.92 | 53.97 | 69.59 | |||||||||||||
1964 | 49.85 | 51.41 | 56.71 | 64.32 | 71.84 | 79.38 | a | 90.60 | 85.27 | 79.80 | 74.92 | 55.42 | 52.90 | 67.70 | ||||||||||||
1965 | 54.02 | 54.43 | a | 56.00 | 65.70 | b | 70.87 | 75.31 | a | 88.02 | 87.21 | 78.80 | 74.56 | 63.57 | 53.89 | 68.53 | ||||||||||
1966 | 49.05 | a | 50.20 | 60.37 | 67.10 | 75.45 | 81.77 | 88.74 | 87.66 | 81.92 | 70.42 | 61.30 | 53.56 | 68.96 | ||||||||||||
1967 | 53.40 | 57.14 | 61.95 | 60.88 | 73.13 | 79.02 | 88.74 | 87.68 | 79.45 | 73.03 | 63.13 | 47.97 | 68.79 | |||||||||||||
1968 | 52.16 | 59.16 | 58.50 | 63.98 | 72.35 | 81.73 | 86.23 | 82.23 | 81.28 | 71.26 | 60.20 | 51.35 | 68.37 | |||||||||||||
1969 | 56.95 | 52.34 | 57.29 | 66.50 | 74.42 | 77.68 | 88.27 | 90.85 | 84.08 | 68.00 | 60.65 | 54.27 | 69.28 | |||||||||||||
1970 | 53.00 | 58.89 | 57.98 | 60.17 | 74.21 | 80.90 | 88.90 | 87.84 | 80.30 | 67.10 | 60.17 | 53.26 | 68.56 | |||||||||||||
1971 | 53.16 | 55.02 | 61.00 | a | 64.60 | 69.47 | 80.02 | 88.90 | a | 83.81 | 81.67 | 67.18 | a | 58.60 | 50.29 | 67.81 | ||||||||||
1972 | 52.47 | 58.53 | 67.35 | 68.28 | 74.11 | 82.67 | 89.84 | 84.88 | a | 81.57 | 69.37 | 56.57 | 51.47 | 69.76 | ||||||||||||
1973 | 50.50 | 55.73 | 53.28 | a | 64.12 | 75.34 | 82.93 | 88.53 | 86.27 | 80.00 | b | 73.13 | 59.65 | 55.18 | 68.72 | |||||||||||
1974 | 52.92 | 55.52 | 61.79 | 67.27 | 74.29 | 86.13 | 87.19 | 86.52 | b | 81.81 | a | 71.76 | 60.08 | 50.85 | 69.68 | |||||||||||
1975 | 53.85 | 53.77 | 58.65 | a | 59.74 | a | 71.44 | d | 80.21 | b | 88.79 | 88.00 | a | 82.98 | 71.00 | 60.85 | 53.90 | a | 68.60 | |||||||
1976 | 56.03 | 59.80 | a | 59.53 | 64.28 | 75.13 | 82.20 | 86.52 | 86.60 | 78.63 | 70.34 | 61.93 | a | 54.81 | 69.65 | |||||||||||
1977 | 53.63 | 59.11 | 56.47 | 67.25 | 68.92 | a | 83.33 | 89.13 | 88.89 | 83.57 | 75.27 | 63.55 | 58.92 | 70.67 | ||||||||||||
1978 | 54.45 | 54.54 | 62.35 | 64.67 | 73.24 | 86.53 | 89.82 | 86.94 | 80.95 | 74.48 | 57.22 | a | 49.02 | 69.52 | ||||||||||||
1979 | 46.89 | 53.25 | 56.95 | a | 65.45 | 72.28 | a | 83.15 | 87.66 | 83.69 | 86.21 | a | 73.15 | 57.85 | 55.63 | 68.51 | ||||||||||
1980 | 55.40 | 59.16 | 57.57 | b | 65.60 | 69.02 | a | 83.79 | a | 91.56 | 87.52 | 82.58 | 73.03 | ----- | z | 58.47 | 71.25 | a | ||||||||
1981 | 56.97 | 59.13 | a | 58.92 | 68.95 | 72.69 | 86.12 | 89.97 | 89.73 | 83.45 | 69.15 | 63.08 | 57.02 | 71.26 | ||||||||||||
1982 | 52.58 | e | 58.09 | e | 59.52 | e | 68.02 | d | 71.18 | f | 78.34 | a | 86.65 | a | 87.88 | c | 81.58 | f | 69.11 | c | 59.80 | b | 51.62 | g | 68.89 | c |
1983 | 53.76 | b | 55.35 | a | 57.41 | d | 60.10 | i | 73.60 | b | 79.23 | b | 87.60 | e | 83.92 | g | 84.36 | b | 70.83 | b | 57.50 | e | 55.60 | g | 68.85 | c |
1984 | 53.62 | c | 55.92 | e | 62.60 | g | 66.98 | f | 80.79 | 81.19 | a | 86.41 | b | 84.94 | g | 83.18 | b | 67.41 | b | 58.00 | d | 52.02 | e | 68.73 | c | |
1985 | 51.32 | f | 53.58 | d | 60.12 | j | 70.83 | f | 75.17 | d | 85.11 | b | 88.85 | a | 87.90 | 77.82 | 71.03 | 58.02 | a | 55.13 | e | 72.51 | c | |||
1986 | 59.05 | a | 58.96 | 66.65 | 69.95 | b | 77.31 | b | 86.80 | 87.77 | 88.73 | e | 79.12 | 71.15 | a | 62.47 | 54.73 | 71.89 | ||||||||
1987 | 53.76 | 56.57 | 59.90 | 72.92 | 74.74 | 85.40 | 87.53 | 86.95 | 82.35 | 78.28 | b | 61.39 | b | 51.92 | a | 70.98 | ||||||||||
1988 | 54.42 | 60.73 | a | 63.08 | 68.05 | 76.62 | b | 84.52 | a | 89.30 | a | 87.88 | e | 81.45 | a | 77.30 | a | 62.23 | 53.87 | 71.62 | ||||||
1989 | 52.57 | b | 58.71 | 66.47 | 75.33 | a | 76.57 | a | 85.28 | a | 90.70 | a | 86.12 | b | 84.82 | 73.94 | 63.92 | 56.37 | 72.57 | |||||||
1990 | 53.38 | a | 54.57 | 63.69 | 70.07 | 74.85 | 87.00 | a | 88.41 | d | 84.90 | 82.33 | a | 74.18 | 63.25 | 52.76 | 70.78 | |||||||||
1991 | 54.34 | 61.40 | b | 56.98 | b | 65.74 | a | 72.90 | a | 79.84 | a | 87.35 | a | 88.77 | a | 82.02 | d | 76.28 | a | 61.91 | c | 53.95 | c | 70.12 | ||
1992 | 54.37 | 58.66 | 59.93 | a | 70.42 | 77.10 | a | 83.08 | 87.61 | c | 85.70 | a | 85.60 | 74.60 | a | 58.29 | a | 51.95 | a | 70.61 | ||||||
1993 | 55.47 | b | 54.62 | c | 62.27 | a | 69.13 | 77.48 | 83.52 | 86.65 | 88.38 | c | 81.76 | c | 74.12 | a | 60.27 | 55.18 | a | 70.74 | ||||||
1994 | 55.32 | a | 55.61 | 63.13 | a | 67.84 | b | 73.50 | b | 87.69 | a | 90.70 | d | 90.05 | c | 84.68 | 70.88 | b | 55.90 | d | 53.36 | c | 70.72 | |||
1995 | 53.59 | b | 61.12 | c | 61.29 | b | 64.50 | b | 70.84 | c | 80.83 | d | 90.37 | e | 91.17 | b | 85.50 | 74.63 | d | 65.82 | h | 62.71 | q | 73.38 | b | |
1996 | 57.56 | g | 60.86 | g | 63.52 | d | 71.11 | b | 78.23 | a | 86.45 | b | 90.94 | g | 88.44 | g | 81.33 | d | 73.10 | b | 63.80 | c | 57.86 | b | 71.92 | d |
1997 | 55.31 | b | 57.35 | a | 67.79 | 68.16 | b | 80.87 | 81.56 | d | 88.79 | 90.89 | 86.79 | a | 71.61 | 63.07 | b | 52.28 | b | 72.04 | ||||||
1998 | 55.23 | 53.37 | a | 60.00 | 63.62 | 70.92 | a | 80.45 | 91.46 | d | 90.69 | 84.08 | 72.10 | 61.77 | b | 54.13 | a | 69.82 | ||||||||
1999 | 57.60 | a | 60.79 | 61.75 | g | 64.22 | 74.28 | a | 83.23 | 88.00 | a | 87.66 | 84.14 | a | 76.60 | a | 66.82 | 55.66 | b | 72.64 | a | |||||
2000 | 57.66 | b | 59.21 | 61.62 | c | 71.50 | g | 79.93 | b | 86.15 | 90.27 | a | 88.08 | a | 86.05 | a | 71.52 | c | 54.77 | 57.31 | 72.05 | a | ||||
2001 | 52.42 | 55.05 | 61.98 | 67.17 | 81.05 | 85.78 | 88.69 | 88.62 | b | 86.31 | d | 75.19 | 65.66 | a | 52.35 | d | 71.69 | |||||||||
2002 | 55.26 | 59.85 | a | 60.10 | e | 70.43 | c | 76.25 | a | 85.94 | e | 89.09 | c | 87.23 | c | 84.90 | e | 70.71 | e | 63.62 | 54.10 | b | 71.46 | |||
2003 | 61.50 | a | 57.39 | 61.83 | a | 65.57 | b | 77.50 | a | 82.82 | 90.31 | e | 88.60 | 84.48 | a | 77.56 | 59.17 | a | 54.30 | c | 71.75 | |||||
2004 | 54.44 | 53.91 | a | 69.45 | b | 67.00 | h | 75.95 | a | 82.02 | 88.21 | c | 87.60 | g | 82.18 | b | 69.28 | a | 57.28 | c | 53.95 | a | 68.67 | b | ||
2005 | 55.18 | 55.72 | a | 60.27 | e | 67.36 | a | 76.66 | b | 83.10 | 89.94 | 86.95 | 83.95 | a | 73.58 | a | 65.00 | c | 55.88 | c | 71.13 | |||||
2006 | 55.78 | a | 58.85 | a | 58.48 | 66.89 | b | 77.02 | 87.60 | 89.62 | b | 86.37 | 80.38 | a | 71.33 | a | 65.38 | d | 54.96 | g | 72.52 | a | ||||
2007 | 50.53 | b | 57.55 | 66.02 | b | 68.30 | 77.29 | c | 84.23 | 88.30 | a | 88.74 | 83.10 | a | 73.74 | b | 66.52 | d | 51.80 | a | 71.34 | |||||
2008 | 52.95 | a | 55.62 | a | 62.65 | 69.42 | 72.77 | a | 85.73 | 87.18 | a | 86.45 | c | 83.09 | b | 73.24 | d | 64.10 | a | 53.88 | b | 70.59 | ||||
2009 | 57.69 | 58.46 | 62.97 | a | 65.88 | a | 79.16 | 80.73 | 91.73 | 88.98 | b | 85.05 | 70.43 | b | 65.00 | a | 53.09 | b | 71.60 | |||||||
2010 | 55.80 | a | 57.11 | 59.97 | 65.50 | d | 71.41 | d | 81.71 | f | 90.06 | f | 89.17 | a | 86.43 | g | 73.03 | b | 61.18 | b | 58.81 | d | 65.78 | c | ||
2011 | 55.73 | a | 53.46 | a | 62.21 | q | 70.15 | c | 73.35 | d | 83.83 | a | 91.58 | r | 90.87 | e | 85.28 | c | 75.95 | a | 60.35 | j | 50.13 | a | 70.97 | c |
2012 | 56.94 | 56.16 | a | 62.86 | f | 70.93 | g | 78.04 | e | 84.55 | k | 89.24 | 89.63 | a | 83.35 | c | 74.17 | j | 65.50 | d | 54.70 | c | 71.69 | d | ||
2013 | 52.76 | 53.57 | 66.15 | a | 69.32 | b | 76.17 | b | 86.60 | d | 88.34 | f | 86.80 | f | 82.86 | a | 69.98 | 63.32 | 55.02 | a | 67.57 | b | ||||
2014 | 59.11 | 61.18 | 65.50 | 70.38 | b | 77.92 | a | 86.27 | 89.24 | 86.94 | 85.57 | 75.95 | 63.88 | b | 56.75 | a | 73.22 | |||||||||
2015 | 56.71 | 63.10 | b | 68.32 | c | 68.57 | c | 72.21 | b | 86.98 | b | 89.00 | d | 91.20 | c | 87.30 | h | 77.21 | 62.73 | j | 54.88 | c | 72.82 | b | ||
2016 | 54.93 | b | 64.56 | c | 67.10 | b | 69.08 | 73.80 | d | 89.46 | f | 91.24 | j | 89.18 | 83.35 | j | 77.98 | j | 67.14 | l | 58.46 | e | 68.16 | e | ||
2017 | 54.79 | n | 60.50 | c | 67.79 | g | 72.02 | h | 76.61 | d | 87.07 | c | 90.44 | 90.21 | 81.83 | 77.65 | 69.98 | a | 59.50 | a | 77.09 | c | ||||
2018 | 63.00 | d | 57.46 | 64.45 | 73.46 | b | 76.58 | 85.50 | 90.90 | a | 89.85 | a | 87.52 | c | 71.36 | b | 60.50 | c | 53.85 | 72.87 | ||||||
2019 | 54.22 | b | 52.67 | a | 60.62 | a | 70.35 | 70.10 | a | 83.64 | a | 90.52 | 93.12 | c | 84.40 | 73.37 | 66.16 | a | 54.50 | 71.14 | ||||||
2020 | 54.79 | 56.00 | c | 60.77 | c | 69.18 | 79.73 | i | 84.80 | h | 91.46 | h | 94.38 | k | 86.52 | i | 78.29 | 67.81 | f | 56.48 | d | 62.59 | f | |||
2021 | 56.43 | c | 58.91 | f | 61.10 | e | 71.48 | e | 76.03 | k | 88.33 | j | 88.32 | n | 89.17 | b | 84.82 | 71.18 | a | 68.50 | 57.97 | b | 70.08 | d | ||
2022 | 56.54 | c | 58.38 | 64.63 | 72.28 | 77.65 | 88.02 | b | 91.71 | 88.50 | 85.72 | 75.36 | f | 59.17 | a | 55.02 | a | 72.51 | a | |||||||
2023 | 52.89 | 54.52 | b | 59.18 | 69.90 | 75.69 | 80.87 | 94.46 | c | 91.73 | 84.98 | 77.69 | 66.19 | a | 58.41 | b | 72.21 | |||||||||
2024 | 54.37 | 57.79 | 61.02 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.73 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.94 | 56.60 | 60.84 | 67.43 | 74.39 | 82.85 | 88.75 | 87.69 | 82.98 | 72.71 | 61.26 | 54.20 | 70.08 | |||||||||||||
S.D. | 3.05 | 3.25 | 3.50 | 3.04 | 2.98 | 3.04 | 1.67 | 2.12 | 2.23 | 2.86 | 3.49 | 2.54 | 1.41 | |||||||||||||
SKEW | -0.24 | 0.15 | 0.25 | -0.05 | 0.21 | -0.29 | 0.34 | -0.01 | -0.40 | -0.04 | 0.04 | 0.09 | 0.15 | |||||||||||||
MAX | 63.00 | 64.56 | 69.45 | 75.33 | 81.05 | 88.02 | 94.46 | 93.12 | 87.52 | 78.29 | 69.98 | 59.50 | 73.22 | |||||||||||||
MIN | 43.22 | 50.20 | 53.28 | 59.74 | 68.92 | 75.31 | 84.27 | 82.23 | 77.82 | 65.30 | 54.77 | 47.97 | 67.70 | |||||||||||||
YRS | 78 | 79 | 75 | 72 | 77 | 75 | 73 | 73 | 74 | 77 | 74 | 76 | 56 |