YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | 82.25 | w | 89.30 | 90.35 | 84.29 | 84.57 | 68.65 | 58.60 | 59.26 | 76.43 | e | |||||||
1958 | 52.29 | 59.33 | a | 54.71 | 68.73 | 82.35 | 89.87 | 90.42 | 88.68 | 80.43 | b | 72.63 | a | 64.24 | a | 65.70 | h | 73.06 | a | |||||||
1959 | 59.62 | r | 57.41 | a | 65.53 | a | 73.62 | a | 80.97 | 90.10 | a | 90.18 | c | 84.17 | a | 84.18 | b | 77.42 | 63.43 | 54.65 | 74.70 | a | ||||
1960 | 48.32 | 52.81 | b | 68.73 | a | 74.43 | 80.58 | 90.72 | a | 88.38 | b | 89.63 | a | 86.52 | c | 72.42 | 65.73 | 52.48 | b | 72.56 | ||||||
1961 | 54.65 | 59.93 | 63.48 | 73.77 | 82.00 | b | 91.21 | a | 90.06 | 85.70 | d | 81.40 | 75.03 | b | 57.93 | a | 51.77 | a | 72.24 | |||||||
1962 | 51.52 | 60.04 | 57.55 | 75.60 | 79.32 | 87.30 | 85.53 | a | 90.18 | c | 81.97 | a | 74.10 | 66.86 | b | 54.94 | 72.07 | |||||||||
1963 | 52.06 | 61.70 | a | 64.14 | c | 71.33 | 83.27 | a | 88.34 | a | 91.10 | b | 82.27 | a | 82.68 | b | 77.23 | 63.86 | a | 59.52 | 73.13 | |||||
1964 | 52.81 | 53.97 | 59.65 | 68.13 | 80.52 | 88.07 | c | 89.82 | c | 88.30 | d | 78.71 | b | 77.27 | e | 62.57 | b | 55.38 | b | 71.27 | ||||||
1965 | 57.68 | 55.65 | b | 59.03 | 72.07 | 78.10 | a | 84.85 | c | 87.07 | c | 86.65 | e | 79.79 | f | 77.43 | a | 65.93 | c | 51.03 | a | 70.50 | a | |||
1966 | 48.65 | 51.07 | a | 65.34 | b | 73.40 | e | 82.21 | c | 87.93 | a | 91.29 | 86.57 | a | 80.57 | 75.45 | b | 66.40 | 55.00 | a | 71.99 | |||||
1967 | 58.97 | a | 61.04 | a | 68.93 | c | 71.38 | f | 78.43 | c | 86.83 | a | 90.00 | a | 85.19 | 80.73 | 77.28 | b | 66.40 | 48.84 | 72.97 | a | ||||
1968 | 54.03 | a | 61.00 | a | 61.45 | b | 67.90 | 79.35 | h | 91.46 | f | 86.96 | c | 82.94 | 82.67 | c | 78.96 | c | 63.04 | d | 54.13 | a | 69.31 | b | ||
1969 | 57.52 | b | 58.37 | a | 60.63 | a | 74.80 | 80.52 | b | 88.73 | 88.28 | f | 89.48 | h | 82.17 | a | 73.38 | e | 61.93 | a | 56.65 | h | 70.90 | c | ||
1970 | 55.90 | 60.00 | a | 60.52 | 67.50 | h | 82.07 | a | 89.30 | c | 90.72 | b | 87.14 | c | 83.04 | d | 69.90 | 67.41 | c | 57.70 | d | 73.06 | a | |||
1971 | 58.55 | b | 59.54 | b | 69.86 | b | 72.10 | 78.58 | 91.11 | b | 93.87 | 84.43 | c | 81.54 | b | 69.40 | a | 63.67 | f | 53.53 | p | 75.90 | b | |||
1972 | 58.37 | a | 63.66 | 73.84 | 75.69 | d | 80.67 | a | 85.83 | 90.50 | a | 85.06 | 80.57 | 71.39 | 57.00 | a | 55.60 | a | 73.18 | |||||||
1973 | 50.19 | 54.25 | 58.81 | 66.07 | b | 78.23 | 87.93 | 87.30 | a | 87.81 | 86.00 | 78.67 | a | 65.80 | 58.87 | 71.66 | ||||||||||
1974 | 56.29 | 61.52 | a | 69.52 | 73.53 | 84.26 | 94.64 | b | 86.35 | 84.55 | 80.70 | 70.30 | a | 63.90 | 51.73 | a | 73.11 | |||||||||
1975 | 54.45 | 56.82 | 61.55 | 66.60 | 77.61 | 88.76 | a | 86.10 | 86.75 | c | 78.37 | 75.63 | a | 65.07 | 55.00 | 71.06 | ||||||||||
1976 | 57.19 | 62.24 | 63.87 | 71.80 | 79.37 | a | 89.79 | a | 85.87 | a | 87.60 | a | 79.50 | 69.23 | 63.24 | a | 55.10 | b | 72.07 | |||||||
1977 | 51.03 | a | 61.63 | a | 61.20 | a | 72.07 | b | 78.69 | e | 89.07 | b | 88.42 | 87.40 | a | 83.45 | a | 76.62 | b | 67.18 | b | 59.65 | 73.03 | |||
1978 | 53.07 | b | 56.07 | 65.97 | 74.34 | a | 80.17 | a | 92.00 | c | 93.13 | 86.00 | b | 82.10 | a | 76.33 | a | 60.77 | 49.17 | a | 72.43 | |||||
1979 | 46.80 | a | 56.75 | 64.57 | a | 73.45 | a | 77.41 | b | 87.10 | a | 92.53 | a | 86.06 | 85.20 | ----- | z | 60.07 | 59.29 | 71.75 | a | |||||
1980 | 54.77 | 60.69 | c | 61.28 | b | 72.17 | 77.32 | 93.37 | 91.97 | 87.90 | 84.17 | a | 73.00 | a | 64.97 | 63.40 | a | 73.75 | ||||||||
1981 | 56.81 | 64.67 | a | 62.42 | 77.37 | 79.53 | a | 92.87 | 88.42 | 86.42 | 83.41 | c | 72.81 | 68.32 | b | 60.53 | a | 74.46 | ||||||||
1982 | 53.94 | 58.82 | 64.52 | 72.87 | 77.48 | 88.60 | 88.65 | 86.10 | a | 81.97 | a | 74.94 | 58.62 | a | 49.48 | 71.33 | ||||||||||
1983 | 55.16 | 57.50 | 62.24 | b | 64.72 | a | 78.81 | 86.83 | a | 89.77 | a | 86.47 | a | 82.50 | 72.17 | a | 60.41 | a | 55.37 | a | 71.00 | |||||
1984 | 57.03 | 61.10 | 66.87 | a | 71.67 | 85.74 | 86.07 | 87.00 | 83.29 | 83.50 | 66.39 | 62.50 | 52.39 | 71.96 | ||||||||||||
1985 | 49.48 | 56.54 | 64.23 | a | 74.30 | 79.50 | a | 90.43 | 91.84 | 88.81 | 79.97 | 70.13 | 61.93 | 58.03 | a | 72.10 | ||||||||||
1986 | 62.71 | 59.75 | 67.03 | 74.13 | 79.77 | a | 87.77 | 85.39 | 86.47 | a | 80.31 | a | 69.87 | 60.33 | 51.31 | b | 72.07 | |||||||||
1987 | 54.84 | 55.89 | a | 61.32 | 73.43 | 76.74 | 88.67 | 90.13 | 84.35 | 80.63 | 76.48 | 62.17 | a | 52.03 | 71.39 | |||||||||||
1988 | 52.42 | 61.48 | 65.61 | 72.21 | a | 81.23 | 89.24 | a | 87.61 | 82.35 | 78.86 | a | 75.35 | 64.80 | 54.52 | 72.14 | ||||||||||
1989 | 54.87 | 63.00 | 71.68 | 80.30 | 84.87 | 91.63 | 91.35 | 85.55 | 82.67 | 73.90 | a | 67.03 | 57.97 | 75.40 | ||||||||||||
1990 | 56.71 | 58.64 | 66.13 | 75.73 | 81.29 | 95.63 | 87.03 | 83.90 | 81.00 | 75.52 | 62.27 | 52.00 | a | 72.99 | ||||||||||||
1991 | 52.77 | 60.52 | a | 59.45 | 71.17 | 79.39 | 84.73 | 85.58 | 82.97 | 78.83 | 74.84 | 61.33 | 51.29 | 70.24 | ||||||||||||
1992 | 49.81 | 55.52 | 62.13 | 74.33 | 73.58 | 83.73 | 86.87 | 84.90 | 83.83 | 75.23 | 57.40 | 50.27 | a | 69.80 | ||||||||||||
1993 | 53.42 | 54.88 | c | 64.45 | 72.59 | a | 78.81 | 87.07 | 87.97 | 82.23 | 81.37 | 70.57 | a | 59.90 | 54.97 | 70.68 | ||||||||||
1994 | 58.27 | a | 56.26 | a | 65.27 | a | 71.13 | 79.33 | a | 91.20 | 90.23 | 89.00 | a | 84.00 | 73.73 | a | 60.79 | a | 55.23 | 72.87 | ||||||
1995 | 51.35 | 62.52 | a | 64.55 | 68.23 | 75.50 | a | 84.43 | 88.16 | 85.29 | 81.10 | a | 77.00 | 68.00 | 56.77 | 71.91 | ||||||||||
1996 | 58.55 | 62.55 | 64.84 | 73.27 | 84.93 | a | 88.37 | 86.87 | 84.06 | 77.03 | a | 70.90 | 62.93 | 57.35 | 72.64 | |||||||||||
1997 | 53.10 | a | 57.84 | c | 67.52 | 68.72 | e | 80.53 | a | 85.34 | a | 86.32 | 85.00 | a | 82.37 | 72.10 | a | 62.47 | 49.19 | 70.88 | ||||||
1998 | 55.97 | 53.22 | a | 61.48 | 65.35 | d | 78.59 | b | 86.69 | a | 86.03 | a | 84.68 | 83.93 | 73.03 | a | 64.40 | 56.83 | a | 70.85 | ||||||
1999 | 60.03 | a | 63.96 | 67.39 | 68.85 | d | 78.74 | 85.03 | a | 83.33 | a | 83.03 | 79.53 | 76.70 | a | 70.30 | 52.71 | 72.47 | ||||||||
2000 | 60.29 | 63.62 | 64.94 | 75.81 | d | 85.55 | 86.17 | 87.32 | 85.97 | 86.03 | 68.74 | 54.33 | 57.65 | 73.03 | ||||||||||||
2001 | 50.97 | a | 57.89 | a | 63.40 | a | 71.52 | a | 81.59 | b | 87.97 | a | 85.81 | 82.90 | 82.17 | 76.39 | 63.70 | 53.87 | 71.51 | |||||||
2002 | 55.81 | 59.74 | a | 66.37 | a | 77.07 | 81.20 | a | 91.45 | a | 86.68 | 86.90 | a | 79.69 | a | 70.00 | 64.21 | b | 51.77 | a | 72.57 | |||||
2003 | 62.16 | 56.23 | b | 61.97 | 70.41 | a | 81.32 | 85.63 | 91.90 | 86.00 | 83.17 | 77.13 | 62.86 | a | 56.35 | 72.93 | ||||||||||
2004 | 53.27 | a | 53.26 | b | 67.70 | a | 67.40 | 79.61 | 86.53 | 87.52 | 82.97 | 78.63 | 70.26 | 57.73 | 55.16 | 70.00 | ||||||||||
2005 | 55.19 | 53.59 | a | 61.10 | b | 70.82 | b | 80.59 | b | 86.70 | 91.63 | a | 84.65 | 82.27 | 72.23 | a | 66.70 | 59.77 | 72.10 | |||||||
2006 | 59.97 | a | 62.11 | 62.55 | b | 75.17 | a | 83.24 | b | 88.93 | 86.89 | c | 80.71 | 75.30 | 69.84 | 65.90 | 55.35 | 72.16 | ||||||||
2007 | 50.03 | a | 57.56 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.79 | j |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | 70.57 | b | 78.77 | 90.28 | a | 87.28 | m | 88.29 | 88.77 | h | 75.40 | a | 63.36 | b | 60.68 | 75.34 | e | |||
2011 | 55.06 | 57.41 | a | 70.57 | a | 75.10 | 78.28 | b | 92.07 | 91.17 | a | 90.19 | 83.97 | 76.80 | a | 62.07 | 50.65 | 73.61 | ||||||||
2012 | 59.81 | 58.75 | a | 67.13 | 77.27 | 82.77 | a | 94.10 | 87.39 | 90.29 | 83.90 | 79.68 | 67.73 | 55.65 | 75.37 | |||||||||||
2013 | 51.77 | 55.50 | 68.58 | 75.10 | 80.74 | 93.77 | 87.29 | 86.16 | 81.60 | 73.10 | 62.90 | 54.87 | 72.62 | |||||||||||||
2014 | 61.42 | 63.36 | 65.87 | a | 72.67 | 80.16 | 92.50 | 88.55 | 84.71 | 82.20 | 76.61 | 63.66 | a | 54.80 | a | 73.87 | ||||||||||
2015 | 55.03 | a | 65.21 | 67.52 | 71.37 | 76.42 | 89.90 | 86.26 | 89.26 | 83.40 | 74.10 | 62.27 | 53.58 | 72.86 | ||||||||||||
2016 | 52.19 | e | 66.59 | 69.48 | 72.43 | 78.06 | 91.57 | 92.26 | 83.94 | 82.07 | 78.77 | 63.63 | 57.65 | 74.05 | ||||||||||||
2017 | 53.00 | a | 61.07 | a | 72.68 | 74.83 | 79.45 | 91.57 | 89.26 | 85.32 | 83.10 | 79.52 | 73.20 | 58.87 | 75.16 | |||||||||||
2018 | 61.26 | 60.36 | 66.87 | 77.90 | 84.61 | 93.17 | 89.16 | 88.10 | b | 85.33 | 70.06 | 62.41 | a | 54.19 | 74.45 | |||||||||||
2019 | 55.35 | 54.00 | 64.90 | 73.00 | 74.97 | 89.97 | 91.65 | 91.61 | 85.03 | 75.32 | 62.93 | 53.61 | 72.70 | |||||||||||||
2020 | 55.68 | 59.00 | 63.87 | 73.53 | 84.61 | 90.67 | 92.61 | 93.32 | 86.43 | 80.84 | 67.83 | 55.90 | 75.36 | |||||||||||||
2021 | 56.42 | 59.29 | 64.03 | 73.80 | 82.87 | 92.33 | 87.71 | 86.55 | 83.27 | 74.45 | 69.90 | a | 58.84 | 74.12 | ||||||||||||
2022 | 56.80 | a | 59.29 | 66.39 | 76.97 | 84.77 | 88.57 | 89.26 | 83.06 | 83.17 | 69.45 | 60.03 | 54.68 | 72.70 | ||||||||||||
2023 | 51.45 | 54.64 | 60.74 | 74.10 | 78.97 | 87.23 | 97.77 | a | 90.35 | 86.60 | 78.23 | 65.80 | 57.55 | 73.62 | ||||||||||||
2024 | 53.39 | 58.68 | a | 60.11 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.39 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.90 | 58.86 | 64.54 | 72.60 | 80.25 | 89.17 | 88.94 | 86.05 | 82.18 | 74.07 | 63.51 | 55.12 | 72.56 | |||||||||||||
S.D. | 3.58 | 3.41 | 3.75 | 3.20 | 2.65 | 2.75 | 2.60 | 2.55 | 2.35 | 3.32 | 3.47 | 3.26 | 1.33 | |||||||||||||
SKEW | 0.11 | -0.07 | 0.09 | -0.40 | 0.13 | 0.18 | 0.61 | 0.46 | -0.34 | -0.15 | 0.01 | 0.07 | 0.25 | |||||||||||||
MAX | 62.71 | 66.59 | 73.84 | 80.30 | 85.74 | 95.63 | 97.77 | 93.32 | 86.60 | 80.84 | 73.20 | 63.40 | 75.40 | |||||||||||||
MIN | 46.80 | 51.07 | 54.71 | 64.72 | 73.58 | 83.73 | 83.33 | 80.71 | 75.30 | 66.39 | 54.33 | 48.84 | 69.80 | |||||||||||||
YRS | 63 | 64 | 63 | 61 | 62 | 63 | 62 | 63 | 62 | 63 | 63 | 61 | 53 |