YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.60 | a | 64.67 | 52.58 | 64.62 | i | ||
1954 | 58.81 | 67.79 | 65.58 | 79.20 | 77.61 | 92.23 | 97.32 | 93.48 | 91.37 | 78.13 | 67.73 | 60.00 | 77.44 | |||||||||||||
1955 | 52.45 | 58.57 | 68.42 | 79.57 | 84.55 | 92.17 | 91.45 | 92.35 | 85.50 | 76.00 | 64.83 | 60.26 | 75.51 | |||||||||||||
1956 | 56.94 | 52.78 | b | 70.83 | a | 75.43 | 88.10 | 95.47 | 95.42 | 93.74 | 90.93 | 79.42 | 62.80 | 60.13 | 76.83 | |||||||||||
1957 | 53.87 | 61.46 | 63.81 | 70.73 | 76.32 | 85.70 | 94.42 | 91.10 | 82.20 | 69.58 | 54.57 | 60.48 | 72.02 | |||||||||||||
1958 | 48.42 | 53.07 | 52.10 | 69.47 | 81.23 | 91.80 | 95.00 | 91.74 | 84.50 | 69.97 | 64.40 | 56.68 | 71.53 | |||||||||||||
1959 | 56.03 | 55.43 | 66.35 | 73.33 | 83.55 | 91.13 | 87.97 | 93.81 | 90.00 | 73.42 | 60.47 | 57.00 | 74.04 | |||||||||||||
1960 | 52.03 | 53.34 | 60.39 | 79.97 | 86.13 | 95.33 | 89.97 | 92.00 | 88.20 | 77.55 | 66.83 | 47.74 | 74.12 | |||||||||||||
1961 | 51.74 | 57.68 | 66.55 | 75.90 | a | 85.84 | 89.00 | 89.00 | 90.94 | 86.17 | 79.97 | 56.50 | 54.71 | 73.67 | ||||||||||||
1962 | 48.63 | d | 67.71 | 62.90 | 74.90 | 90.37 | a | 90.03 | a | 92.80 | a | 94.23 | 84.14 | a | 76.80 | a | 65.20 | 56.10 | 75.32 | |||||||
1963 | 50.87 | a | 61.11 | 69.19 | 80.79 | a | 84.55 | 85.80 | j | 94.55 | 92.71 | 88.17 | 83.35 | 67.70 | 50.20 | a | 74.84 | a | ||||||||
1964 | 55.61 | 43.62 | 66.87 | 78.50 | 86.06 | 92.61 | b | 96.74 | ----- | z | ----- | z | ----- | z | ----- | z | 55.90 | 71.99 | d | |||||||
1965 | 58.10 | a | 54.25 | 58.19 | 79.80 | 84.94 | 91.80 | 96.84 | 92.42 | 86.57 | 78.00 | 71.47 | 57.58 | 75.83 | ||||||||||||
1966 | 45.42 | 54.14 | ----- | z | 72.14 | a | 81.13 | 89.40 | 96.06 | 85.61 | 82.90 | 74.13 | 70.70 | 54.55 | 73.29 | a | ||||||||||
1967 | 57.40 | a | 59.29 | 74.00 | 79.93 | 85.32 | 89.83 | 91.10 | 88.94 | 80.43 | 78.13 | 63.60 | 50.19 | 74.85 | ||||||||||||
1968 | 51.16 | 52.79 | 62.90 | 71.97 | 82.19 | 89.60 | 89.03 | 89.06 | 84.30 | 80.16 | 61.30 | 57.32 | 72.65 | |||||||||||||
1969 | 60.58 | 57.89 | 55.29 | 76.33 | 81.42 | 90.73 | 95.06 | 93.71 | 81.40 | 68.87 | 63.90 | 59.81 | 73.75 | |||||||||||||
1970 | 53.94 | 60.04 | 60.06 | 74.70 | 83.90 | 88.90 | 93.58 | 93.16 | 82.90 | 71.65 | 64.53 | 63.06 | 74.20 | |||||||||||||
1971 | 58.87 | 59.07 | 69.29 | 75.60 | 84.00 | 91.37 | 93.39 | 83.16 | 81.40 | 73.68 | 66.27 | 56.29 | 74.37 | |||||||||||||
1972 | 59.10 | 63.59 | 75.87 | 82.23 | 79.87 | 89.20 | 87.52 | 86.10 | 83.93 | 74.10 | 55.50 | 54.19 | 74.27 | |||||||||||||
1973 | 46.77 | 53.50 | 65.87 | 70.20 | 82.87 | 91.23 | 91.68 | 93.16 | 84.50 | 81.32 | 70.60 | 61.32 | 74.42 | |||||||||||||
1974 | 56.55 | 64.32 | 75.58 | 79.23 | 89.48 | 94.57 | 97.19 | 89.10 | 75.47 | 73.19 | 62.47 | 53.97 | 75.93 | |||||||||||||
1975 | 55.19 | 56.54 | 67.06 | 75.60 | 84.19 | 93.53 | 87.03 | 90.42 | 80.50 | 79.42 | 66.80 | 58.48 | 74.56 | |||||||||||||
1976 | 57.13 | 70.14 | 69.84 | 78.33 | 82.23 | 92.93 | 86.03 | 92.55 | 83.13 | 69.97 | 57.73 | 57.48 | 74.79 | |||||||||||||
1977 | 48.87 | 62.04 | 67.87 | 73.40 | 86.65 | 94.53 | 95.13 | 95.29 | 91.73 | 78.45 | 68.13 | 60.74 | 76.90 | |||||||||||||
1978 | 46.06 | 47.14 | 69.06 | 83.03 | 85.10 | 92.03 | 96.90 | 92.48 | 84.27 | 76.00 | 61.10 | 54.03 | 73.94 | |||||||||||||
1979 | 43.58 | 58.04 | 65.32 | 76.47 | 80.26 | 87.93 | 92.87 | 88.65 | 87.93 | 82.10 | 59.57 | 57.13 | 73.32 | |||||||||||||
1980 | 53.65 | 58.66 | 67.00 | 74.80 | 82.06 | 95.80 | 98.00 | 92.45 | 84.03 | 75.74 | 60.37 | 60.42 | 75.25 | |||||||||||||
1981 | 56.74 | 62.89 | 64.23 | 77.50 | 83.23 | 92.57 | 93.52 | 88.90 | 85.27 | 73.87 | 69.90 | 61.03 | 75.80 | |||||||||||||
1982 | 54.84 | 56.46 | 67.90 | 74.63 | 81.45 | 87.83 | a | 93.39 | 94.32 | 88.87 | 76.52 | 62.50 | 52.03 | 74.23 | ||||||||||||
1983 | 50.07 | a | 57.68 | 68.39 | 71.33 | 84.35 | 88.93 | 94.77 | 95.29 | 90.60 | 77.26 | 64.93 | 45.03 | 74.05 | ||||||||||||
1984 | 51.84 | 63.45 | 66.94 | 75.30 | 86.97 | 88.83 | 91.81 | 89.52 | 82.50 | 70.03 | 62.67 | 56.87 | 73.89 | |||||||||||||
1985 | 51.55 | 56.18 | 68.55 | 79.00 | 86.19 | 88.93 | 93.55 | 94.87 | 83.19 | c | 72.68 | 66.03 | 54.77 | 74.62 | ||||||||||||
1986 | 60.94 | 61.00 | 71.81 | 79.45 | a | 84.32 | 86.27 | 92.77 | 89.52 | 82.43 | 71.71 | 61.27 | 50.23 | 74.31 | ||||||||||||
1987 | 52.81 | 57.46 | 62.00 | 74.23 | 80.87 | 87.50 | 90.68 | 90.29 | 82.80 | 78.42 | 65.47 | 54.19 | 73.06 | |||||||||||||
1988 | 48.42 | 58.93 | 68.48 | 74.70 | 81.13 | 89.60 | 89.06 | 90.45 | 85.27 | 77.97 | 69.30 | 56.29 | 74.13 | |||||||||||||
1989 | 59.39 | 53.82 | 71.13 | 80.55 | a | 87.55 | 87.90 | 92.52 | 89.29 | 82.53 | 81.13 | 68.07 | 50.06 | 75.33 | ||||||||||||
1990 | 58.97 | 63.39 | 63.90 | 74.77 | 82.29 | 98.13 | 87.39 | 87.84 | 84.97 | a | 77.10 | 67.87 | 55.13 | 75.14 | ||||||||||||
1991 | 48.77 | 64.11 | 70.17 | a | 77.97 | 87.71 | 89.67 | 88.45 | 89.06 | 77.73 | 78.19 | 57.10 | 52.77 | 73.48 | ||||||||||||
1992 | 49.68 | 60.90 | 70.03 | 74.97 | 78.48 | 87.40 | 91.52 | 85.58 | 85.50 | 79.26 | 60.07 | 54.74 | 73.18 | |||||||||||||
1993 | 51.00 | 55.68 | 65.71 | 74.66 | a | 82.58 | 90.03 | 93.32 | 92.35 | 84.23 | 73.90 | 59.80 | 58.65 | 73.49 | ||||||||||||
1994 | 54.55 | 57.86 | 67.94 | 75.80 | 79.87 | a | 95.83 | 94.71 | 91.26 | 85.40 | 75.94 | 64.60 | 59.19 | 75.24 | ||||||||||||
1995 | 54.77 | 63.00 | 65.03 | 74.93 | 80.81 | 89.43 | 94.55 | 89.90 | 81.57 | 77.81 | 67.53 | 57.19 | 74.71 | |||||||||||||
1996 | 57.13 | 63.38 | 64.61 | 76.43 | 91.42 | 91.43 | 90.71 | 87.35 | 81.73 | 76.68 | 65.33 | 60.97 | 75.60 | |||||||||||||
1997 | 51.42 | 52.57 | 71.71 | 68.13 | 80.35 | 87.13 | 92.06 | 91.43 | a | 88.47 | 75.97 | 61.93 | 50.90 | 72.67 | ||||||||||||
1998 | 60.71 | 58.14 | 63.77 | 74.93 | 90.35 | 96.93 | 97.65 | 89.55 | 91.47 | 78.97 | 66.23 | 57.57 | a | 77.19 | ||||||||||||
1999 | 60.58 | 68.43 | 64.29 | 76.33 | 81.32 | 88.40 | 92.81 | 95.87 | 84.27 | 77.61 | 72.67 | 56.94 | 76.63 | |||||||||||||
2000 | 60.57 | a | 68.97 | 71.26 | 78.30 | 90.52 | 87.13 | 94.42 | 94.81 | 91.40 | 74.45 | 55.20 | 49.65 | 76.39 | ||||||||||||
2001 | 49.13 | 60.04 | 59.55 | 79.70 | 87.06 | 95.27 | 99.16 | 94.39 | 86.57 | 78.42 | 65.43 | 58.23 | 76.08 | |||||||||||||
2002 | 58.32 | 56.75 | 65.26 | 76.63 | 85.23 | 92.97 | 91.10 | 94.61 | 87.77 | 70.90 | 60.40 | 54.77 | 74.56 | |||||||||||||
2003 | 58.37 | a | 56.54 | 70.19 | 80.47 | 86.26 | 87.87 | 95.42 | 95.26 | 83.23 | 80.48 | 64.93 | 60.68 | 76.64 | ||||||||||||
2004 | 56.26 | 55.31 | 68.00 | 72.93 | 87.65 | 91.00 | 90.77 | 88.16 | 82.23 | 75.68 | 57.97 | 55.68 | 73.47 | |||||||||||||
2005 | 56.58 | 56.07 | 65.13 | 76.40 | 79.93 | a | 92.30 | 92.72 | b | 88.26 | 90.20 | 74.90 | 66.92 | d | 56.35 | 74.65 | ||||||||||
2006 | 63.32 | 61.62 | b | 68.17 | b | 81.93 | a | 90.45 | 95.47 | 96.08 | f | 92.48 | 81.03 | 74.52 | 67.90 | 54.03 | 75.54 | a | ||||||||
2007 | 45.84 | 58.46 | 69.81 | 70.80 | 76.45 | 87.00 | 88.58 | 91.03 | 85.80 | 81.19 | 65.17 | 56.19 | 73.03 | |||||||||||||
2008 | 53.97 | 63.46 | a | 68.23 | 76.43 | 85.39 | 96.40 | 90.13 | 89.23 | 80.67 | 75.16 | 67.33 | 57.19 | 75.30 | ||||||||||||
2009 | 58.65 | 65.93 | 70.58 | 77.03 | 84.23 | 93.20 | 92.42 | 94.65 | 83.17 | 73.10 | 69.03 | 49.23 | 75.93 | |||||||||||||
2010 | 52.48 | 50.21 | 64.77 | 74.03 | 81.68 | 94.97 | 87.10 | 93.61 | 86.57 | 77.68 | 66.40 | 60.26 | 74.15 | |||||||||||||
2011 | 55.71 | 58.46 | 74.65 | 82.90 | 85.87 | 100.70 | 99.42 | 100.55 | 86.97 | 78.52 | 65.37 | 47.03 | 78.01 | |||||||||||||
2012 | 60.52 | 57.69 | 73.48 | 84.00 | 86.87 | 95.67 | 94.39 | 94.71 | 86.33 | 75.52 | 70.57 | 58.74 | 78.21 | |||||||||||||
2013 | 52.97 | 58.64 | 69.81 | 76.03 | 85.61 | 94.67 | 91.32 | 94.81 | 88.00 | 76.74 | 60.90 | 52.19 | 75.14 | |||||||||||||
2014 | 55.84 | 58.00 | 68.06 | 77.17 | 83.58 | 91.77 | 92.23 | 94.16 | 80.13 | 78.71 | 58.73 | 55.77 | 74.51 | |||||||||||||
2015 | 48.32 | 57.86 | 65.00 | 76.40 | 78.48 | 89.30 | 93.55 | 94.32 | 90.13 | 75.65 | 63.77 | 57.55 | 74.19 | |||||||||||||
2016 | 53.74 | 64.07 | 72.42 | 76.10 | 81.65 | 90.63 | 99.32 | 89.90 | 83.67 | 81.06 | 66.57 | 55.06 | 76.18 | |||||||||||||
2017 | 55.39 | 66.11 | 75.29 | 77.57 | 83.16 | 93.30 | 94.61 | 88.65 | 86.20 | 75.32 | 69.20 | 56.81 | 76.80 | |||||||||||||
2018 | 54.74 | 61.50 | 71.68 | 77.10 | 92.84 | 96.90 | 95.77 | 92.94 | 83.03 | 70.06 | 59.03 | 52.68 | 75.69 | |||||||||||||
2019 | 55.06 | 60.89 | 62.35 | 76.37 | 81.10 | 90.27 | 95.13 | 97.81 | 89.33 | 72.77 | 60.77 | 58.81 | 75.05 | |||||||||||||
2020 | 57.87 | 55.55 | 67.35 | 76.43 | 89.13 | 94.10 | 98.94 | 98.10 | 84.83 | 76.61 | 69.47 | 57.10 | 77.12 | |||||||||||||
2021 | 50.68 | 50.36 | 69.35 | 72.23 | 81.00 | 90.97 | 89.68 | 90.84 | 90.70 | 81.03 | 67.27 | 67.23 | 75.11 | |||||||||||||
2022 | 54.29 | 55.04 | 68.16 | 80.70 | 90.84 | 94.40 | 99.97 | 92.06 | 87.20 | 73.00 | 59.03 | 53.97 | 75.72 | |||||||||||||
2023 | 57.68 | 58.04 | 68.61 | 75.13 | 83.52 | 92.77 | 97.68 | 98.10 | 91.40 | 75.23 | 63.77 | 58.45 | 76.70 | |||||||||||||
2024 | 50.58 | 63.14 | 68.13 | 75.54 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.62 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.21 | 58.85 | 67.26 | 76.43 | 84.14 | 91.60 | 93.20 | 91.86 | 85.25 | 76.19 | 64.20 | 56.01 | 74.92 | |||||||||||||
S.D. | 4.39 | 5.04 | 4.44 | 3.32 | 3.68 | 3.18 | 3.37 | 3.21 | 3.56 | 3.34 | 4.24 | 3.97 | 1.41 | |||||||||||||
SKEW | -0.27 | -0.16 | -0.72 | -0.04 | 0.20 | 0.39 | -0.05 | -0.04 | 0.01 | -0.24 | -0.32 | -0.31 | 0.13 | |||||||||||||
MAX | 63.32 | 70.14 | 75.87 | 84.00 | 92.84 | 100.70 | 99.97 | 100.55 | 91.73 | 83.35 | 72.67 | 67.23 | 78.21 | |||||||||||||
MIN | 43.58 | 43.62 | 52.10 | 68.13 | 76.32 | 85.70 | 86.03 | 83.16 | 75.47 | 68.87 | 54.57 | 45.03 | 71.53 | |||||||||||||
YRS | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 70 | 70 | 71 | 66 |