YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.87 | 51.45 | 56.16 | j | ||
1952 | 50.71 | 54.10 | 50.18 | 57.36 | a | 67.65 | 65.93 | 79.23 | 80.35 | 80.88 | b | 68.82 | ----- | z | 50.81 | 64.18 | a | |||||||||
1953 | 56.06 | 51.96 | 54.03 | 55.10 | 58.85 | 65.60 | 75.74 | 72.61 | 71.09 | a | 65.45 | 59.23 | 51.77 | 61.46 | ||||||||||||
1954 | 48.78 | b | 57.37 | a | 51.52 | 58.33 | 62.28 | a | 66.21 | b | 77.63 | 71.43 | a | 72.40 | 65.45 | 60.90 | 52.15 | 62.04 | ||||||||
1955 | 46.66 | c | 50.39 | a | 55.87 | a | 57.07 | b | 60.07 | b | 66.37 | 71.50 | 78.00 | a | 75.40 | a | 63.58 | 56.18 | e | 52.54 | d | 61.13 | ||||
1956 | 52.16 | 47.73 | c | 55.26 | 56.03 | a | 63.21 | 69.52 | c | 73.47 | 70.93 | c | 76.83 | 61.63 | 60.60 | 54.15 | 61.79 | |||||||||
1957 | 48.88 | a | 55.68 | 55.00 | b | 57.32 | 59.57 | a | 72.23 | 76.45 | 75.87 | 71.98 | 61.40 | a | 53.93 | 55.19 | 61.96 | |||||||||
1958 | 52.26 | 54.85 | a | 51.61 | 59.59 | b | 65.71 | 68.05 | 71.92 | a | 76.53 | 75.10 | 69.83 | a | 58.12 | 60.52 | a | 63.67 | ||||||||
1959 | 57.63 | 51.89 | 61.66 | 64.45 | 61.87 | 72.05 | 79.52 | 76.19 | 71.82 | 69.28 | a | 64.08 | 56.37 | 65.57 | ||||||||||||
1960 | 49.94 | 51.71 | 59.18 | 62.02 | 65.63 | a | 72.98 | 79.81 | 75.56 | 77.78 | 65.71 | 57.25 | 53.35 | 64.24 | ||||||||||||
1961 | 57.73 | 56.62 | 54.68 | 61.52 | 60.48 | 71.38 | 74.58 | 75.44 | 70.22 | 64.50 | 55.55 | 50.95 | 62.80 | |||||||||||||
1962 | 51.19 | 48.34 | 48.60 | 61.03 | 58.85 | a | 65.23 | 70.60 | 75.56 | 71.42 | 63.53 | 56.73 | 52.74 | 60.32 | ||||||||||||
1963 | 47.65 | 57.23 | 51.84 | 53.40 | 59.90 | 62.55 | 71.58 | 73.08 | 76.65 | 67.09 | b | 57.27 | b | 55.74 | 61.16 | |||||||||||
1964 | 50.55 | 52.54 | b | 53.11 | c | 57.25 | 60.38 | a | 67.03 | a | 77.15 | 74.71 | 70.43 | 71.77 | 55.77 | 51.98 | a | 61.89 | ||||||||
1965 | 53.95 | 53.86 | 53.89 | 59.15 | 61.18 | 63.05 | 73.10 | 77.85 | 68.03 | 71.16 | 58.00 | 52.11 | 62.11 | |||||||||||||
1966 | 50.92 | 50.80 | a | 57.65 | 61.57 | 64.35 | a | 69.20 | 75.82 | 76.84 | 73.33 | 68.15 | 60.02 | 54.45 | 63.59 | |||||||||||
1967 | 54.90 | 58.02 | 56.32 | 51.38 | 64.28 | a | 64.80 | 77.23 | 80.87 | 73.40 | 71.53 | 63.10 | 50.53 | 63.86 | ||||||||||||
1968 | 53.29 | 59.50 | 58.35 | 60.28 | 64.21 | 70.45 | 77.21 | 73.98 | 73.93 | 67.79 | 60.78 | a | 52.29 | 64.34 | ||||||||||||
1969 | 55.13 | 50.27 | 54.82 | 59.83 | 64.21 | 64.72 | ----- | z | 78.90 | 75.92 | 63.60 | 61.47 | 53.63 | 62.04 | a | |||||||||||
1970 | 53.65 | 56.88 | 56.48 | a | 56.63 | 65.05 | 68.95 | b | 78.02 | 78.82 | a | 74.35 | 66.40 | b | 57.30 | 50.02 | a | 63.54 | ||||||||
1971 | 53.40 | a | 54.52 | 58.06 | 58.58 | 58.79 | e | 69.76 | a | 77.00 | ----- | z | 74.52 | 64.32 | 57.37 | 47.27 | a | 61.24 | a | |||||||
1972 | 52.27 | 57.24 | 60.87 | a | 60.83 | 65.97 | 69.08 | 79.14 | b | 77.00 | a | 70.66 | a | 62.81 | ----- | z | 51.56 | 64.31 | a | |||||||
1973 | 49.19 | 53.09 | 50.08 | 57.30 | 64.77 | 73.05 | a | ----- | z | 76.94 | f | 69.11 | b | 68.95 | a | 54.86 | a | 54.26 | 59.47 | b | ||||||
1974 | 51.29 | 55.73 | d | 56.89 | 61.89 | b | 63.23 | a | 73.42 | 76.28 | d | 73.71 | c | 75.04 | c | 64.40 | a | 59.07 | b | 50.72 | d | 63.47 | ||||
1975 | 57.38 | e | 55.77 | b | 53.83 | d | 53.60 | d | 63.33 | b | 66.88 | a | 72.52 | a | 74.60 | b | 75.67 | g | 63.74 | f | 59.45 | b | 54.69 | 61.21 | b | |
1976 | 58.25 | c | 55.30 | a | 55.15 | a | 57.02 | d | 65.52 | b | 73.93 | c | 74.12 | a | 74.19 | 69.69 | a | 67.55 | 63.09 | b | 56.15 | a | 64.16 | |||
1977 | 52.87 | 59.54 | a | 52.24 | 61.17 | a | 58.69 | 69.70 | 76.98 | 75.94 | 73.02 | b | 69.55 | a | 63.07 | a | 59.26 | 64.34 | ||||||||
1978 | 54.55 | 56.19 | b | 59.26 | 57.46 | b | 66.54 | c | 74.72 | c | 79.08 | 75.50 | 73.25 | 71.03 | a | 57.24 | c | 49.65 | 64.54 | |||||||
1979 | 49.81 | 52.39 | a | 54.93 | a | 60.52 | 65.31 | b | 75.11 | c | 76.97 | a | 74.98 | 81.00 | c | 65.64 | b | 57.66 | b | 57.77 | a | 64.34 | ||||
1980 | 54.81 | b | 57.89 | b | 55.26 | 61.20 | 59.40 | 71.33 | 79.44 | 76.61 | 72.34 | a | 70.05 | c | 61.03 | a | 59.41 | b | 64.90 | |||||||
1981 | 57.71 | b | 59.08 | b | 55.92 | 61.15 | 65.08 | 76.80 | 77.73 | 79.88 | a | 75.70 | 63.95 | 61.18 | 57.58 | 65.98 | ||||||||||
1982 | 51.50 | ----- | z | 55.16 | 60.07 | 62.36 | c | 64.50 | a | 75.60 | a | 77.85 | 74.24 | a | 67.55 | 56.47 | a | 52.35 | 63.42 | a | ||||||
1983 | 55.77 | 55.00 | 55.07 | a | 55.83 | 64.21 | 67.16 | b | 75.10 | a | 78.69 | 78.17 | 68.66 | b | 57.33 | 54.70 | a | 63.81 | ||||||||
1984 | 56.42 | 56.34 | ----- | z | 59.98 | b | 69.64 | c | 69.32 | 78.82 | a | 77.10 | 79.94 | c | 63.83 | a | 55.81 | a | 50.90 | a | 65.28 | a | ||||
1985 | 51.56 | 53.48 | a | 53.84 | c | 63.45 | 62.57 | c | 72.72 | a | 78.07 | c | 76.05 | a | 68.39 | b | 64.50 | d | 55.52 | b | 56.75 | a | 63.08 | |||
1986 | 60.23 | 56.50 | a | 58.17 | a | 59.80 | 63.46 | c | 69.90 | a | 72.88 | a | 77.80 | a | 66.00 | 65.21 | c | 61.53 | a | 55.38 | c | 63.91 | ||||
1987 | 52.28 | a | 53.64 | c | 54.15 | a | 64.54 | b | 64.03 | a | 68.14 | a | 67.69 | e | 71.30 | c | 73.15 | c | 69.50 | b | 58.17 | 50.41 | c | 62.25 | ||
1988 | 54.05 | c | 58.80 | f | 59.89 | c | 59.29 | f | 65.10 | e | 65.59 | b | 74.32 | c | 73.07 | b | 70.25 | d | 67.42 | f | 58.18 | h | 53.29 | e | 64.45 | d |
1989 | 52.63 | e | 54.09 | f | 59.62 | c | 65.04 | b | 63.02 | e | 69.17 | d | 75.81 | g | 72.64 | b | 75.97 | k | 66.95 | i | 63.29 | f | 58.42 | e | 62.94 | e |
1990 | 54.54 | c | 52.46 | e | 57.74 | f | 60.56 | e | 62.89 | h | 73.16 | e | 76.91 | h | 73.21 | e | 75.21 | d | ----- | z | 61.33 | d | 53.35 | g | 64.35 | e |
1991 | 53.96 | e | 60.42 | b | 51.31 | e | 58.34 | e | 60.87 | e | 63.67 | c | 70.16 | c | 73.73 | a | ----- | z | 71.70 | f | 62.43 | c | 54.36 | b | 60.92 | b |
1992 | 56.50 | i | 56.64 | a | ----- | z | 64.62 | d | 65.68 | f | ----- | z | 74.80 | d | 80.02 | h | 76.43 | c | 67.70 | h | ----- | z | 51.24 | h | 68.12 | h |
1993 | 53.31 | b | 52.33 | e | 59.12 | c | 62.15 | d | 65.67 | h | ----- | z | 69.60 | a | 73.67 | g | 73.94 | d | 67.13 | e | 59.83 | d | 55.07 | c | 61.39 | c |
1994 | 57.98 | g | 52.98 | f | 58.44 | e | 59.13 | g | 60.52 | e | 72.58 | e | 72.48 | c | ----- | z | 73.90 | a | ----- | z | 53.86 | a | 53.81 | 63.66 | e | |
1995 | 52.93 | b | 60.42 | d | 57.07 | a | 58.80 | c | 59.16 | b | 67.20 | 76.67 | a | 80.70 | a | 77.03 | 68.10 | a | 64.89 | c | 56.39 | 64.95 | ||||
1996 | 55.98 | 56.22 | 57.44 | 64.02 | d | 66.29 | b | 70.90 | d | 78.00 | d | 78.27 | c | 72.37 | c | ----- | z | 60.43 | b | 56.45 | a | 65.13 | a | |||
1997 | 54.05 | 54.86 | f | ----- | z | ----- | z | 70.36 | b | 67.65 | 72.77 | a | 78.50 | b | 78.98 | d | 67.96 | c | 61.31 | c | 53.02 | a | 67.18 | c | ||
1998 | 54.16 | f | 51.82 | 56.17 | d | ----- | z | ----- | z | 65.59 | c | 77.83 | b | 81.62 | b | ----- | z | ----- | z | ----- | z | ----- | z | 66.61 | g | |
1999 | 56.29 | b | 54.43 | f | 54.00 | a | 57.56 | f | 61.80 | d | 67.71 | f | 74.84 | b | 76.48 | a | 69.71 | i | 73.12 | e | ----- | z | 57.02 | d | 64.79 | e |
2000 | 57.13 | d | 55.09 | a | 55.70 | d | 63.52 | e | 66.66 | i | 71.64 | a | 73.86 | c | 77.50 | e | 74.06 | d | 63.85 | g | 56.54 | d | 59.19 | j | 65.00 | c |
2001 | 51.44 | d | 51.37 | e | 56.64 | c | 57.16 | e | 67.00 | i | 72.67 | 71.70 | c | 76.78 | f | 74.40 | d | 68.54 | c | 60.02 | f | 52.48 | h | 62.99 | d | |
2002 | 53.87 | a | 57.43 | a | 55.56 | f | 57.52 | i | 62.57 | d | 69.38 | f | 72.90 | a | 73.88 | f | 74.72 | j | 62.04 | g | 62.76 | g | 52.90 | e | 59.93 | g |
2003 | 61.74 | f | 55.35 | d | 58.18 | a | 56.13 | c | 63.72 | b | 66.20 | e | 76.41 | h | 79.00 | a | 75.70 | b | 72.87 | h | 58.00 | c | 51.55 | t | 64.04 | d |
2004 | 54.82 | c | 50.34 | 60.75 | c | 62.05 | a | 67.82 | 68.38 | n | 74.36 | b | 73.85 | e | 75.17 | f | 62.14 | m | 54.31 | l | 54.12 | w | 63.43 | e | ||
2005 | 55.59 | n | 53.39 | n | 57.74 | n | 61.06 | u | 65.19 | o | 67.89 | u | 74.17 | y | ----- | z | 70.65 | t | 64.07 | p | 66.81 | v | 57.25 | i | ----- | z |
2006 | 55.05 | j | 57.00 | q | 52.12 | o | 55.67 | o | 63.96 | r | 74.00 | u | 80.78 | o | 74.46 | s | 71.65 | q | 64.57 | x | 60.83 | x | 56.33 | y | ----- | z |
2007 | ----- | z | 54.50 | i | ----- | z | ----- | z | 63.79 | l | 68.50 | u | 74.42 | r | 79.45 | t | 71.20 | j | 65.23 | t | 58.31 | v | 49.11 | h | ----- | z |
2008 | 49.78 | m | 50.40 | x | ----- | z | 66.10 | y | 61.85 | g | 71.44 | n | 72.85 | r | 74.76 | h | 74.67 | f | 71.04 | r | 62.05 | t | 49.68 | n | ----- | z |
2009 | 57.92 | 52.38 | b | 56.18 | 59.38 | a | 65.47 | 66.00 | a | 76.45 | 75.13 | 76.40 | 66.82 | 62.47 | 52.11 | 63.89 | ||||||||||
2010 | 55.48 | 52.16 | 54.94 | 55.03 | 60.03 | 65.23 | 69.76 | 73.55 | 74.08 | 63.35 | a | 57.07 | 53.76 | 61.20 | ||||||||||||
2011 | 53.97 | 50.46 | 55.45 | 59.60 | 59.61 | 65.70 | 72.34 | 74.29 | 71.78 | 67.34 | 56.68 | 50.08 | 61.44 | |||||||||||||
2012 | 56.18 | 52.41 | 54.29 | 59.23 | 62.89 | 66.68 | 72.60 | 78.47 | 77.05 | 66.95 | 59.52 | 50.79 | 63.09 | |||||||||||||
2013 | 50.82 | 51.41 | 58.55 | 60.12 | 65.44 | 69.75 | 74.21 | 75.00 | 74.08 | 63.29 | 59.00 | 53.29 | 62.91 | |||||||||||||
2014 | 59.40 | 56.77 | 59.03 | 61.83 | 67.58 | 69.02 | 75.44 | 75.85 | 76.45 | 69.45 | 61.25 | 53.60 | 65.47 | |||||||||||||
2015 | 56.73 | 60.95 | 63.82 | 62.00 | 60.44 | 72.43 | 73.00 | 76.45 | 75.97 | 70.11 | 57.74 | a | 51.26 | 65.07 | ||||||||||||
2016 | 51.45 | a | 61.09 | 57.75 | a | 60.47 | 60.95 | 73.21 | b | 75.82 | 76.10 | 71.18 | 68.03 | 62.27 | 53.57 | a | 64.32 | |||||||||
2017 | 51.55 | 54.71 | 61.27 | 62.77 | 63.24 | 71.87 | 76.71 | 76.45 | 72.35 | 69.97 | 62.70 | 58.79 | 65.20 | |||||||||||||
2018 | 59.10 | 54.57 | 56.52 | b | 61.85 | 62.81 | 69.47 | 79.40 | 77.89 | 73.62 | 66.31 | 60.58 | 53.48 | 64.63 | ||||||||||||
2019 | 53.15 | 49.73 | 54.97 | 61.37 | 58.40 | 68.68 | 74.61 | 76.34 | 72.55 | 66.79 | 61.07 | 51.60 | 62.44 | |||||||||||||
2020 | 52.47 | 54.31 | 53.15 | 60.05 | 66.90 | 69.50 | 74.84 | 79.42 | 78.05 | 71.34 | 58.72 | a | 53.37 | 64.34 | ||||||||||||
2021 | 53.10 | 53.73 | 52.90 | 60.40 | 62.87 | 71.37 | 76.58 | 76.87 | 73.42 | 63.18 | 62.12 | 50.79 | 63.11 | |||||||||||||
2022 | 54.77 | 54.38 | 58.10 | 61.63 | 63.92 | 73.70 | 74.94 | 79.05 | 77.12 | 66.97 | 54.45 | 52.08 | 64.26 | |||||||||||||
2023 | 49.87 | 49.54 | 51.34 | 59.20 | 60.05 | 64.00 | 78.11 | 77.03 | 69.82 | 68.18 | 60.12 | 54.76 | 61.83 | |||||||||||||
2024 | 51.18 | 51.52 | 53.19 | 58.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.48 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.59 | 54.47 | 55.85 | 59.67 | 63.10 | 69.12 | 75.19 | 76.25 | 73.96 | 67.04 | 59.16 | 53.64 | 63.37 | |||||||||||||
S.D. | 2.96 | 3.18 | 3.07 | 2.88 | 2.85 | 3.36 | 2.84 | 2.45 | 3.11 | 2.81 | 2.70 | 2.73 | 1.40 | |||||||||||||
SKEW | 0.06 | 0.14 | 0.07 | -0.46 | 0.27 | 0.06 | -0.39 | -0.05 | -0.00 | -0.03 | -0.03 | 0.46 | -0.25 | |||||||||||||
MAX | 60.23 | 61.09 | 63.82 | 65.04 | 70.36 | 76.80 | 79.81 | 81.62 | 81.00 | 73.12 | 64.89 | 60.52 | 65.98 | |||||||||||||
MIN | 46.66 | 47.73 | 48.60 | 51.38 | 58.40 | 62.55 | 67.69 | 70.93 | 66.00 | 61.40 | 53.86 | 47.27 | 60.32 | |||||||||||||
YRS | 65 | 63 | 64 | 63 | 62 | 63 | 63 | 61 | 61 | 55 | 59 | 62 | 44 |