YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.14 | c | 57.14 | k |
1951 | 53.71 | 61.82 | 69.77 | 69.40 | 78.30 | a | 80.57 | 87.42 | 87.61 | 87.54 | b | 81.43 | c | 66.90 | 56.55 | 73.42 | ||||||||||
1952 | 53.26 | 61.39 | a | 63.87 | 71.76 | a | 82.81 | 78.47 | 88.65 | e | 89.87 | a | 91.45 | h | 81.67 | p | 66.04 | d | 55.47 | p | 72.90 | c | ||||
1953 | 61.37 | a | 68.70 | a | 67.43 | c | 70.28 | a | 74.58 | g | 82.58 | d | 92.87 | 85.23 | a | 90.67 | f | 85.31 | o | 65.33 | f | 65.39 | 74.23 | d | ||
1954 | 59.41 | b | 62.57 | 66.04 | c | 75.27 | 80.74 | 80.70 | j | 91.23 | r | 82.57 | j | 84.80 | 77.67 | j | 61.76 | i | 52.33 | j | 71.47 | f | ||||
1955 | 53.48 | 61.33 | g | 68.60 | a | 64.66 | a | 78.40 | a | 80.54 | d | 85.00 | d | 89.97 | a | 85.82 | m | 80.03 | a | 67.00 | 57.39 | 72.51 | b | |||
1956 | 55.77 | a | 59.52 | 66.36 | i | 69.40 | 77.88 | f | 86.17 | 87.28 | f | 85.94 | 87.28 | a | 74.70 | d | 71.60 | 60.25 | g | 73.80 | d | |||||
1957 | 55.00 | b | 62.07 | 64.00 | i | 72.57 | 75.57 | h | 89.50 | 87.17 | g | 88.22 | d | 94.88 | v | 71.86 | q | 64.86 | a | 55.35 | 69.65 | e | ||||
1958 | 56.00 | e | 61.32 | 60.94 | 71.10 | 78.81 | 83.32 | b | 85.55 | 91.20 | a | 91.37 | 83.17 | a | 69.60 | 64.53 | a | 74.74 | ||||||||
1959 | 58.87 | 60.43 | 71.68 | 77.10 | 77.23 | 87.67 | 92.90 | a | 88.48 | 83.80 | 82.10 | 71.73 | 61.93 | a | 76.16 | |||||||||||
1960 | 55.58 | 62.31 | 66.52 | 71.31 | a | 77.65 | 89.17 | 91.23 | 90.16 | 87.57 | 78.35 | 63.90 | 55.84 | 74.13 | ||||||||||||
1961 | 50.06 | 64.18 | 64.81 | 74.90 | 72.71 | 89.37 | 94.29 | 89.48 | 86.86 | a | 81.86 | j | 66.20 | 54.65 | 73.41 | a | ||||||||||
1962 | 56.32 | 57.96 | 62.90 | 77.40 | 75.39 | 84.07 | 86.90 | 88.84 | 84.60 | 74.84 | 67.87 | 54.42 | 72.63 | |||||||||||||
1963 | 54.61 | 67.36 | 63.97 | 64.33 | 73.45 | 81.97 | 86.68 | 88.71 | 89.53 | 76.81 | 62.03 | 48.06 | 71.46 | |||||||||||||
1964 | 55.90 | 64.71 | o | 66.81 | 72.73 | 73.84 | 81.60 | 88.74 | 89.32 | 86.37 | 81.77 | 60.87 | 58.32 | 74.21 | a | |||||||||||
1965 | 53.58 | 63.29 | 65.10 | 68.63 | 78.06 | 77.00 | 86.61 | 87.90 | 81.33 | 84.32 | 65.20 | 50.55 | 71.80 | |||||||||||||
1966 | 58.35 | 59.89 | 66.32 | 77.20 | 78.29 | 83.37 | 79.52 | 87.43 | a | 85.97 | 79.71 | 65.37 | 54.00 | 72.95 | ||||||||||||
1967 | 57.52 | 60.68 | 62.97 | 60.03 | 78.71 | 79.50 | 90.72 | b | 94.47 | a | 88.33 | 83.06 | 69.13 | 57.23 | a | 73.53 | ||||||||||
1968 | 55.35 | 65.52 | b | 67.84 | 74.60 | 74.65 | 85.93 | 87.97 | 83.90 | 85.60 | 76.16 | 62.37 | 53.71 | 72.80 | ||||||||||||
1969 | 51.87 | 55.14 | 65.16 | 68.90 | 77.39 | 78.50 | 89.29 | 94.45 | 87.53 | 74.47 | a | 68.87 | 58.65 | 72.52 | ||||||||||||
1970 | 58.00 | 63.32 | 68.42 | 69.33 | 79.81 | 83.20 | 89.23 | a | 86.74 | 88.60 | 75.00 | 65.40 | 52.97 | 73.34 | ||||||||||||
1971 | 55.03 | 60.46 | 64.39 | 68.10 | 72.03 | 82.23 | 88.16 | 90.19 | 87.38 | a | 75.55 | 64.41 | a | 51.94 | 71.66 | |||||||||||
1972 | 49.61 | 60.90 | 70.35 | 69.20 | 79.06 | 85.07 | 84.33 | a | 87.68 | 82.03 | 71.71 | 59.60 | 49.94 | 70.79 | ||||||||||||
1973 | 53.90 | 60.82 | 61.74 | 72.57 | 78.39 | 87.07 | 85.52 | 85.03 | 81.70 | 75.81 | 60.73 | 54.55 | 71.49 | |||||||||||||
1974 | 55.16 | 59.29 | 62.58 | 67.90 | 74.90 | 82.27 | 85.39 | 85.48 | 85.63 | 78.97 | 64.00 | 53.06 | 71.22 | |||||||||||||
1975 | 53.94 | 58.32 | 60.58 | 63.30 | 77.32 | 80.43 | 82.61 | 84.29 | 84.23 | 73.26 | 63.53 | 58.52 | 70.03 | |||||||||||||
1976 | 60.26 | 61.00 | 65.35 | 67.40 | 79.61 | 81.54 | d | ----- | z | 81.94 | ----- | z | 78.68 | 66.70 | 60.06 | 70.25 | b | |||||||||
1977 | 51.65 | 64.61 | 64.06 | 73.63 | 69.45 | 82.23 | 86.77 | 85.84 | 79.50 | 77.87 | 68.00 | 59.19 | 71.90 | |||||||||||||
1978 | 57.71 | 59.39 | 66.71 | 66.47 | 79.13 | 81.37 | 86.94 | 86.42 | 83.83 | 81.71 | 63.40 | 52.55 | 72.14 | |||||||||||||
1979 | 54.61 | 58.75 | 64.03 | 68.72 | a | 80.69 | e | 89.07 | 90.35 | 88.35 | 90.77 | 78.29 | 65.37 | 61.26 | 74.19 | |||||||||||
1980 | 57.77 | a | 64.31 | 67.61 | 72.90 | a | 79.13 | 83.23 | 91.55 | 87.61 | 85.77 | 82.10 | 69.87 | 57.10 | 74.91 | |||||||||||
1981 | 55.62 | b | 64.64 | 65.71 | 77.07 | 84.58 | 96.80 | 96.05 | k | 92.68 | 89.57 | 76.71 | 67.57 | 57.29 | 75.29 | a | ||||||||||
1982 | 51.55 | 63.56 | a | 63.13 | 69.53 | 83.06 | 82.87 | 91.81 | 92.48 | 87.00 | 77.90 | 58.27 | 55.77 | 73.08 | ||||||||||||
1983 | 50.35 | 60.63 | a | 63.10 | 68.67 | 80.13 | 89.33 | 91.97 | 93.92 | s | 91.67 | 82.03 | 63.83 | a | 56.83 | a | 72.59 | a | ||||||||
1984 | 55.87 | 61.97 | 72.10 | 73.63 | 86.77 | 91.27 | 98.81 | 94.23 | 95.67 | 76.38 | b | 62.30 | 54.23 | 76.93 | ||||||||||||
1985 | 50.13 | a | 65.71 | 64.70 | a | 79.00 | 82.71 | 94.57 | 95.61 | 90.84 | 85.03 | 78.84 | 61.79 | a | 49.37 | a | 74.86 | |||||||||
1986 | 58.35 | 64.25 | 70.16 | 74.70 | 84.23 | 89.83 | a | 92.13 | 93.81 | 82.80 | 78.26 | 71.43 | 55.45 | 76.28 | ||||||||||||
1987 | 54.30 | a | 61.86 | 63.77 | 76.17 | 78.90 | 83.00 | a | 81.68 | 85.94 | 85.10 | 79.26 | 62.63 | 53.74 | 72.20 | |||||||||||
1988 | 56.33 | a | 67.14 | 71.26 | 70.66 | a | 75.00 | b | 82.90 | a | 91.32 | 87.23 | a | 86.20 | 77.61 | 61.40 | 56.35 | 73.62 | ||||||||
1989 | 55.77 | 57.00 | 63.20 | a | 74.00 | 76.61 | 80.63 | 88.16 | 85.35 | 82.00 | a | 77.13 | a | 68.10 | a | 55.19 | 71.93 | |||||||||
1990 | 56.77 | 58.82 | 67.90 | 73.47 | 74.74 | 83.67 | 89.87 | 87.39 | 85.97 | 80.61 | 67.25 | b | 53.65 | 73.34 | ||||||||||||
1991 | 58.16 | 66.46 | 58.50 | a | 69.57 | 74.06 | 80.43 | 88.63 | a | 83.48 | 88.86 | b | 82.48 | 68.77 | 56.65 | 73.01 | ||||||||||
1992 | 51.45 | 63.24 | 66.26 | 75.20 | 83.52 | 82.73 | 88.13 | 91.55 | 87.07 | 81.03 | b | 67.50 | 52.65 | 74.19 | ||||||||||||
1993 | 53.65 | 58.93 | 68.29 | 71.77 | 76.60 | a | 86.87 | 88.39 | 88.23 | 87.68 | b | 78.26 | 66.10 | 53.68 | 73.20 | |||||||||||
1994 | 57.16 | 59.29 | 69.58 | 72.17 | a | 75.40 | a | 87.00 | c | 88.62 | b | 91.03 | 86.70 | 77.19 | 57.47 | 51.39 | 72.75 | |||||||||
1995 | 56.34 | b | 61.14 | 63.30 | a | 69.50 | 74.37 | a | 81.30 | 89.29 | 91.13 | 86.79 | a | 81.47 | a | 72.55 | a | 59.67 | a | 73.90 | ||||||
1996 | 56.83 | a | 61.97 | 68.19 | 72.90 | 77.07 | b | 87.03 | 93.77 | 93.26 | 86.07 | 77.03 | a | 66.47 | 59.16 | 74.98 | ||||||||||
1997 | 55.71 | 64.43 | 71.52 | 74.47 | 84.48 | 85.50 | 89.81 | 87.74 | 88.20 | 76.45 | 65.67 | 55.58 | 74.96 | |||||||||||||
1998 | 54.48 | 56.29 | 64.97 | 68.37 | 67.74 | 78.43 | 89.90 | 93.90 | 86.33 | 75.42 | 63.20 | 55.13 | 71.18 | |||||||||||||
1999 | 53.07 | a | 58.36 | 62.00 | 70.07 | 75.37 | a | 84.70 | 87.58 | 88.13 | 87.30 | 81.16 | 66.63 | 60.33 | a | 72.89 | ||||||||||
2000 | 57.61 | 58.97 | 66.74 | 74.03 | 78.94 | 87.83 | 85.77 | 89.87 | 85.83 | a | 73.93 | c | 60.07 | a | 58.16 | 73.15 | ||||||||||
2001 | 56.76 | b | 59.86 | 70.30 | a | 69.40 | 88.14 | c | 89.83 | a | 87.16 | 89.61 | 86.10 | 81.97 | b | 65.70 | 54.67 | a | 74.96 | |||||||
2002 | 55.10 | 63.36 | 65.87 | a | 70.69 | a | 77.55 | 88.03 | a | 91.39 | 91.61 | 88.56 | c | 77.84 | 66.67 | 56.27 | a | 74.41 | ||||||||
2003 | 57.71 | c | 62.04 | 68.52 | b | 65.52 | a | 78.63 | a | 85.40 | 93.90 | a | 88.87 | a | 89.07 | a | 81.57 | a | 61.00 | 55.90 | 74.01 | |||||
2004 | 54.41 | b | 59.97 | 75.63 | a | 75.52 | a | 80.46 | c | 85.60 | 88.77 | 88.52 | 87.73 | 73.58 | 62.13 | 56.74 | 74.09 | |||||||||
2005 | 51.23 | a | 61.35 | b | 67.74 | 68.50 | 75.03 | 79.30 | 92.87 | 90.65 | 82.47 | 77.48 | 70.03 | 58.55 | 72.93 | |||||||||||
2006 | 61.55 | 64.25 | 59.45 | 66.40 | 77.71 | 87.47 | 95.35 | 86.94 | 87.37 | 76.16 | 64.47 | 57.13 | 73.69 | |||||||||||||
2007 | 58.42 | 61.46 | 70.16 | 72.93 | 80.55 | 84.63 | 88.42 | 89.55 | 83.50 | 74.29 | 70.37 | 56.45 | 74.23 | |||||||||||||
2008 | 53.06 | 61.31 | 68.06 | 73.20 | 79.77 | 88.03 | 89.39 | 90.81 | 88.73 | 80.94 | 67.97 | 53.97 | 74.60 | |||||||||||||
2009 | 58.84 | 58.71 | 64.94 | 71.83 | 79.10 | 81.60 | 89.06 | 89.39 | 91.13 | 74.00 | 66.50 | 53.16 | 73.19 | |||||||||||||
2010 | 53.13 | 59.79 | 63.10 | 64.10 | 72.45 | 84.07 | 86.35 | 84.03 | 85.77 | 75.29 | 64.57 | 55.81 | 70.70 | |||||||||||||
2011 | 52.77 | 58.89 | 60.55 | 68.27 | 71.87 | 78.70 | 86.13 | a | 86.60 | a | 89.27 | 77.06 | 61.80 | 59.94 | 70.99 | |||||||||||
2012 | 60.87 | 63.21 | 62.39 | 71.20 | 79.84 | 85.10 | a | 88.77 | a | 91.00 | b | 87.83 | a | 76.90 | 65.24 | a | 55.45 | 73.98 | ||||||||
2013 | 56.97 | 64.32 | c | 69.32 | 76.87 | 82.07 | d | 86.74 | g | 92.33 | g | 89.67 | d | 87.68 | k | 76.48 | f | 68.48 | c | 60.23 | a | 70.99 | d | |||
2014 | 67.62 | b | 62.96 | 69.03 | 73.43 | b | 81.29 | 87.30 | 89.23 | 87.55 | 85.80 | 81.06 | 67.10 | 58.57 | a | 75.91 | ||||||||||
2015 | 60.29 | 66.93 | 73.32 | c | 74.17 | 74.00 | c | 90.87 | 88.80 | a | 89.38 | b | 89.04 | b | 84.37 | a | 63.67 | 55.94 | 75.90 | |||||||
2016 | 56.42 | 67.24 | 66.00 | 74.00 | 79.03 | 88.47 | 90.00 | 87.68 | 85.27 | 72.48 | 65.47 | 56.34 | b | 74.03 | ||||||||||||
2017 | 54.84 | 59.39 | 68.17 | a | 70.32 | b | 79.27 | a | 86.43 | b | 93.35 | 89.83 | a | 86.43 | b | 81.11 | c | 64.43 | 62.06 | 74.64 | ||||||
2018 | 58.66 | b | 65.70 | a | 64.19 | 71.27 | 76.42 | 87.03 | 91.83 | a | 87.10 | b | 86.21 | b | 80.03 | a | 68.70 | 58.58 | 74.64 | |||||||
2019 | 59.26 | 55.04 | 64.00 | 74.14 | a | 73.30 | a | 87.41 | c | 88.56 | d | 91.59 | b | 87.39 | b | 79.17 | a | 69.43 | b | 57.03 | 73.86 | |||||
2020 | 58.06 | 67.55 | 64.16 | 72.57 | 80.97 | a | 90.00 | c | 90.45 | b | 93.53 | a | 90.86 | a | 85.16 | 66.70 | 60.73 | a | 76.73 | |||||||
2021 | 60.65 | 65.12 | b | 66.50 | a | 75.86 | a | 82.39 | 87.93 | a | 91.39 | 90.10 | 89.00 | 74.26 | 64.87 | 53.53 | a | 75.13 | ||||||||
2022 | 60.60 | a | 65.65 | b | 70.58 | 72.90 | 80.71 | 88.30 | 88.77 | 91.16 | 90.50 | 80.81 | 63.70 | 53.74 | 75.62 | |||||||||||
2023 | 57.57 | a | 58.43 | 58.81 | 71.07 | c | 74.28 | b | 79.76 | a | 91.87 | 91.23 | 82.67 | 80.20 | a | 68.79 | b | 61.43 | a | 73.01 | ||||||
2024 | 59.10 | b | 60.38 | 64.39 | 74.93 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.70 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.04 | 61.85 | 66.06 | 71.42 | 78.07 | 84.86 | 89.23 | 88.95 | 86.72 | 78.43 | 65.60 | 56.30 | 73.53 | |||||||||||||
S.D. | 3.18 | 3.05 | 3.49 | 3.70 | 3.87 | 4.02 | 3.30 | 2.80 | 2.80 | 3.17 | 3.27 | 3.34 | 1.57 | |||||||||||||
SKEW | 0.44 | 0.12 | 0.18 | -0.50 | -0.01 | 0.34 | -0.05 | -0.06 | 0.10 | 0.01 | -0.17 | 0.19 | -0.01 | |||||||||||||
MAX | 67.62 | 68.70 | 75.63 | 79.00 | 88.14 | 96.80 | 98.81 | 94.47 | 95.67 | 85.16 | 72.55 | 65.39 | 76.93 | |||||||||||||
MIN | 49.61 | 55.04 | 58.50 | 60.03 | 67.74 | 77.00 | 79.52 | 81.94 | 79.50 | 71.71 | 57.47 | 48.06 | 70.03 | |||||||||||||
YRS | 74 | 72 | 72 | 74 | 70 | 71 | 67 | 71 | 67 | 67 | 71 | 71 | 61 |