YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1960 | ----- | z | 60.60 | x | 73.34 | b | 77.60 | 83.42 | 95.10 | a | 91.39 | 86.81 | 87.53 | 75.39 | 69.63 | 58.39 | 79.86 | b | ||||||||
1961 | 57.87 | 62.89 | 68.74 | 77.97 | 84.81 | e | 93.40 | 91.90 | 86.94 | 83.38 | a | 76.58 | 61.66 | a | 55.94 | 75.17 | ||||||||||
1962 | 56.84 | 63.18 | 61.84 | 79.48 | a | 82.03 | 90.70 | 89.06 | 92.84 | 86.20 | 80.17 | a | 71.13 | 59.61 | 76.09 | |||||||||||
1963 | 56.90 | 66.21 | 68.71 | 75.93 | 86.65 | 90.27 | 91.45 | 84.84 | 85.27 | 79.50 | a | 66.10 | 59.87 | 75.98 | ||||||||||||
1964 | 56.42 | 58.21 | 62.71 | 71.23 | 83.65 | 89.43 | 91.19 | 84.58 | 79.70 | 78.03 | 63.73 | 59.71 | 73.22 | |||||||||||||
1965 | 61.03 | 59.29 | 63.29 | 74.33 | 80.17 | a | 87.47 | 89.71 | 88.74 | 81.97 | 80.47 | a | 70.43 | 56.52 | 74.45 | |||||||||||
1966 | 54.29 | 56.33 | a | 69.84 | 75.70 | 84.61 | 90.60 | 91.74 | 84.06 | 81.03 | a | 76.48 | 69.43 | 59.16 | 74.44 | |||||||||||
1967 | 62.71 | 65.61 | 73.00 | a | 73.67 | 82.19 | 87.77 | 87.93 | c | 86.71 | 83.43 | 80.52 | 69.83 | 53.68 | 75.59 | |||||||||||
1968 | 57.81 | 65.34 | 63.26 | 70.80 | 82.00 | 92.33 | 88.74 | 84.27 | a | 84.73 | 81.42 | 65.90 | 59.77 | 74.70 | ||||||||||||
1969 | 62.39 | 59.93 | 64.71 | 78.00 | 84.32 | 90.33 | 89.84 | 91.45 | 86.77 | 76.39 | 64.43 | 60.61 | 75.76 | |||||||||||||
1970 | 60.10 | 64.79 | 63.35 | 71.13 | 84.90 | 91.93 | 92.16 | 87.10 | 81.80 | 74.61 | 70.20 | 63.10 | 75.43 | |||||||||||||
1971 | 62.71 | 62.71 | 73.00 | 74.73 | 79.52 | 91.37 | 93.84 | ----- | z | 84.30 | 70.68 | 66.23 | 56.32 | 74.13 | a | |||||||||||
1972 | 62.81 | 67.24 | 76.39 | 79.13 | 82.32 | 89.87 | 92.10 | 87.77 | 84.47 | 75.10 | 62.53 | 59.73 | a | 76.62 | ||||||||||||
1973 | 54.77 | 59.18 | 58.81 | 70.11 | b | 82.55 | b | 91.77 | 89.52 | 90.33 | a | 89.07 | a | 81.13 | 69.60 | 63.29 | 75.01 | |||||||||
1974 | 59.48 | 64.00 | a | 70.80 | a | 76.96 | d | 85.32 | 97.10 | a | 88.17 | b | 87.26 | 83.63 | 74.70 | a | 68.80 | 58.53 | a | 76.23 | ||||||
1975 | 60.21 | l | 61.11 | 66.80 | a | 70.30 | 80.48 | 91.03 | 87.84 | 89.26 | 82.17 | 77.97 | 69.47 | 60.55 | 76.09 | a | ||||||||||
1976 | 61.27 | a | 64.24 | 67.58 | 73.43 | 82.00 | 92.53 | 87.06 | 89.16 | 82.17 | 72.68 | 64.40 | 58.35 | 74.57 | ||||||||||||
1977 | 56.13 | 65.89 | a | 64.26 | 75.43 | 80.23 | 92.77 | 89.19 | 89.39 | 86.53 | 76.42 | 69.13 | 64.42 | 75.82 | ||||||||||||
1978 | 58.87 | 59.25 | 68.06 | 75.10 | 81.97 | 94.63 | 92.55 | 88.00 | 84.47 | 78.94 | 63.27 | 54.87 | 75.00 | |||||||||||||
1979 | 52.32 | 62.36 | 66.13 | 76.73 | 79.42 | 90.40 | 93.00 | 88.90 | 89.13 | 82.97 | 65.53 | 62.58 | 75.79 | |||||||||||||
1980 | 59.94 | 63.48 | 64.94 | 75.47 | 80.84 | 97.33 | 95.16 | 88.68 | 88.83 | 76.68 | 68.07 | 65.52 | 77.08 | |||||||||||||
1981 | 58.87 | 65.07 | 64.16 | 77.00 | 80.74 | 94.47 | 88.87 | 88.77 | 86.37 | 74.68 | 71.60 | 66.35 | 76.41 | |||||||||||||
1982 | 60.53 | a | 64.63 | a | 68.97 | 78.20 | 81.41 | b | 91.80 | 91.61 | 87.71 | 84.47 | 78.81 | 62.83 | 55.13 | a | 75.51 | |||||||||
1983 | 58.68 | 61.36 | 63.19 | 67.70 | 81.52 | 88.23 | 91.03 | 88.13 | a | 84.83 | 73.23 | 64.41 | a | 60.61 | 73.58 | |||||||||||
1984 | 59.38 | b | 64.68 | a | 70.74 | 74.20 | 88.40 | a | 88.73 | 88.66 | b | 84.68 | 85.40 | 69.97 | 66.87 | 58.80 | a | 75.04 | ||||||||
1985 | 55.31 | b | 61.44 | a | 69.23 | 77.71 | b | 83.34 | b | 94.03 | a | 91.90 | 89.07 | a | 83.48 | a | 73.35 | 63.13 | 60.63 | a | 75.22 | |||||
1986 | 64.03 | a | 63.24 | c | 69.46 | c | 75.54 | b | 82.69 | b | 87.86 | b | 84.87 | a | 84.34 | b | 81.62 | a | 73.45 | 62.97 | 55.17 | a | 73.77 | |||
1987 | 57.86 | b | 56.89 | a | 62.84 | 73.93 | 76.77 | 90.66 | a | 90.29 | 83.50 | a | 80.67 | 78.07 | a | 63.76 | a | 57.32 | 72.71 | |||||||
1988 | 57.14 | b | 63.30 | b | 67.69 | b | 72.62 | a | 82.94 | 90.71 | b | 87.61 | 83.39 | 82.13 | 77.19 | 66.38 | a | 56.53 | a | 73.97 | ||||||
1989 | 54.67 | a | 65.30 | a | 73.13 | a | 81.40 | 85.71 | 92.43 | 92.70 | a | 85.58 | 86.73 | 75.13 | 66.63 | 59.13 | a | 76.55 | ||||||||
1990 | 58.60 | a | 59.52 | a | 67.87 | 76.10 | a | 81.03 | 95.17 | 85.93 | a | 82.68 | 81.70 | 76.32 | 65.40 | 54.74 | 73.76 | |||||||||
1991 | 54.68 | 62.61 | 62.68 | 73.83 | 81.13 | a | 88.10 | 88.74 | 85.77 | 81.77 | 77.77 | 64.10 | 52.87 | a | 72.84 | |||||||||||
1992 | 50.52 | 58.79 | 62.77 | 75.40 | 78.19 | 89.83 | 88.06 | 85.38 | b | 85.53 | 78.45 | 61.53 | 55.19 | 72.47 | ||||||||||||
1993 | 55.13 | 57.04 | 67.35 | 75.53 | 83.10 | 91.70 | 87.61 | 85.65 | 84.77 | 75.13 | 63.59 | a | 58.34 | b | 73.74 | |||||||||||
1994 | 61.13 | a | 60.00 | a | 67.38 | b | 74.40 | 81.52 | 94.53 | 91.52 | 89.58 | 84.07 | 74.45 | 62.66 | a | 56.58 | 74.82 | |||||||||
1995 | 55.17 | a | 62.79 | 67.23 | a | 72.07 | 77.23 | a | 88.59 | a | 91.84 | 88.61 | 84.07 | 80.23 | 69.40 | 60.73 | a | 74.83 | ||||||||
1996 | 63.32 | 64.64 | a | 67.87 | 77.40 | 87.52 | 93.17 | 89.61 | 85.81 | 81.03 | 75.10 | a | 67.36 | b | 62.39 | 76.27 | ||||||||||
1997 | 54.90 | 60.61 | 71.42 | 70.90 | 85.03 | 89.73 | 91.61 | 87.42 | 87.66 | a | 75.10 | 67.33 | 50.73 | a | 74.37 | |||||||||||
1998 | 59.65 | 55.04 | 65.23 | a | 69.60 | 80.16 | 90.69 | a | 87.87 | 88.03 | 86.00 | 76.69 | b | 69.03 | 58.77 | a | 73.90 | |||||||||
1999 | 62.90 | 67.96 | 71.06 | 72.23 | 82.93 | a | 89.40 | 84.19 | 85.06 | 85.13 | 79.84 | 72.73 | 57.45 | 75.91 | ||||||||||||
2000 | 64.77 | 66.59 | 67.58 | 79.70 | 89.60 | a | 89.53 | 90.03 | a | 86.21 | b | 87.70 | 70.35 | 57.38 | a | 61.48 | 75.91 | |||||||||
2001 | 52.55 | 59.54 | 66.55 | 73.80 | 85.32 | 91.70 | c | 86.48 | 87.00 | 86.53 | 78.00 | 66.70 | 58.33 | a | 74.38 | |||||||||||
2002 | 58.39 | 63.41 | a | 68.90 | 79.66 | a | 85.13 | a | 94.92 | e | 90.11 | c | 87.55 | 84.43 | 73.74 | 67.57 | b | 54.87 | a | 75.72 | ||||||
2003 | 64.97 | 59.36 | c | 66.37 | a | 73.73 | 85.42 | 91.70 | 95.03 | 87.65 | 85.27 | 78.90 | 65.70 | 60.97 | b | 76.25 | ||||||||||
2004 | 55.97 | 57.31 | 70.97 | 69.90 | a | 83.27 | a | 90.21 | a | 89.61 | 86.35 | 81.75 | b | 73.39 | 59.60 | 57.00 | 72.94 | |||||||||
2005 | 57.53 | a | 55.61 | 63.70 | a | 74.30 | 83.24 | b | 90.03 | 93.77 | 84.50 | a | 85.10 | a | 76.03 | 71.00 | c | 62.04 | e | 74.74 | ||||||
2006 | 62.29 | 65.96 | 64.13 | a | 79.00 | p | 86.15 | e | 92.64 | b | 81.38 | w | 83.27 | t | 78.40 | 68.83 | y | 64.62 | v | 57.09 | t | 74.93 | f | |||
2007 | 50.81 | d | 61.32 | c | 70.10 | a | 73.71 | b | 82.77 | a | 91.62 | a | 87.65 | e | 85.13 | a | 83.66 | a | 76.69 | e | 70.46 | b | 57.10 | b | 74.25 | |
2008 | 55.52 | 63.36 | a | 68.65 | e | 78.00 | e | 81.00 | a | 92.79 | a | 85.57 | a | 82.52 | 81.59 | a | 77.48 | d | 67.85 | c | 58.67 | d | 74.42 | |||
2009 | 62.20 | a | 65.29 | 70.52 | 75.11 | b | 85.76 | b | 86.50 | 91.35 | 89.16 | 84.38 | a | 74.16 | 68.56 | c | 56.15 | r | 77.54 | a | ||||||
2010 | 56.87 | a | 57.64 | 65.10 | 72.66 | a | 80.58 | 92.42 | f | 88.83 | a | 87.45 | b | 84.14 | a | 75.37 | a | 64.46 | b | 63.83 | g | 73.31 | b | |||
2011 | 60.00 | g | 60.58 | d | 73.52 | f | 78.39 | b | 81.54 | e | 91.27 | s | 87.88 | g | 89.04 | f | 86.76 | e | 79.57 | h | 63.09 | g | 54.10 | a | 72.27 | g |
2012 | 62.13 | h | 62.78 | b | 69.48 | b | 79.54 | d | 85.68 | f | 93.68 | b | 85.00 | a | 88.12 | e | 84.07 | c | 79.79 | g | 69.77 | h | 59.24 | b | 77.74 | d |
2013 | 53.97 | b | 57.91 | e | 71.42 | e | 75.88 | e | 80.81 | j | 94.93 | p | 85.41 | i | 85.90 | j | 84.00 | 75.71 | j | 65.03 | a | 57.10 | b | 66.47 | e | |
2014 | 64.33 | a | 69.17 | d | 68.97 | a | 75.26 | c | 82.92 | r | 92.40 | j | 87.00 | c | 82.84 | 80.30 | 76.52 | b | 64.23 | d | 59.31 | b | 72.79 | b | ||
2015 | 58.52 | 66.73 | b | 67.87 | 72.50 | 77.66 | b | 91.33 | 85.10 | 88.03 | 82.34 | a | 75.00 | b | 64.80 | 57.27 | a | 73.93 | ||||||||
2016 | 56.81 | 67.96 | a | 71.80 | a | 74.00 | 79.83 | a | 91.76 | a | 89.97 | 83.68 | 82.10 | 80.61 | 67.27 | 61.52 | b | 75.61 | ||||||||
2017 | 56.59 | b | 65.46 | 75.33 | a | 79.14 | b | 82.74 | 95.30 | 87.20 | a | 85.65 | 84.67 | 82.20 | a | 75.70 | 61.87 | a | 77.65 | |||||||
2018 | 65.46 | c | 62.61 | 70.47 | a | 80.00 | 85.52 | 92.31 | a | 89.77 | 86.58 | 86.24 | a | 71.97 | 65.24 | a | 58.55 | k | 77.83 | a | ||||||
2019 | 65.67 | y | 56.00 | 67.81 | 75.28 | a | 76.27 | a | 89.83 | 90.63 | a | 89.68 | 82.76 | a | 76.34 | b | 65.72 | a | 58.38 | b | 75.34 | a | ||||
2020 | 60.90 | b | 61.34 | 64.84 | ----- | z | 89.56 | v | 91.10 | 91.13 | 92.42 | 86.67 | 82.23 | a | 71.40 | e | 59.89 | c | 76.19 | b | ||||||
2021 | 59.67 | d | 64.09 | e | 66.23 | 76.10 | 83.58 | 92.60 | e | 86.42 | 85.00 | 82.89 | b | 76.96 | f | 71.69 | d | 61.60 | a | 75.44 | a | |||||
2022 | 59.35 | 60.46 | 68.53 | a | 79.07 | a | 85.83 | a | 90.43 | 87.55 | 82.52 | 81.57 | b | 71.26 | 62.90 | a | 58.26 | d | 73.98 | |||||||
2023 | 56.63 | a | 58.04 | 64.83 | a | 77.60 | 81.26 | 89.10 | 96.71 | 90.39 | 87.97 | a | 79.80 | a | 67.60 | 63.80 | a | 76.14 | ||||||||
2024 | 57.00 | 61.93 | 64.97 | 71.28 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.30 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 58.47 | 62.13 | 67.58 | 75.20 | 82.62 | 91.45 | 89.72 | 86.91 | 84.21 | 76.61 | 66.59 | 58.85 | 74.97 | |||||||||||||
S.D. | 3.56 | 3.40 | 3.53 | 3.02 | 2.77 | 2.34 | 2.69 | 2.43 | 2.38 | 3.08 | 3.43 | 3.13 | 1.19 | |||||||||||||
SKEW | -0.01 | -0.17 | 0.12 | -0.22 | 0.01 | 0.35 | 0.15 | 0.15 | 0.01 | -0.03 | 0.01 | -0.00 | -0.12 | |||||||||||||
MAX | 65.46 | 69.17 | 76.39 | 81.40 | 89.60 | 97.33 | 96.71 | 92.84 | 89.13 | 82.97 | 75.70 | 66.35 | 77.65 | |||||||||||||
MIN | 50.52 | 55.04 | 58.81 | 67.70 | 76.27 | 86.50 | 84.19 | 82.52 | 78.40 | 69.97 | 57.38 | 50.73 | 72.47 | |||||||||||||
YRS | 60 | 64 | 64 | 62 | 60 | 60 | 61 | 60 | 64 | 59 | 61 | 60 | 50 |