YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.10 | 67.87 | 58.26 | 67.41 | i | |||
1965 | 61.00 | 54.82 | 62.03 | 80.63 | 82.55 | 89.37 | 96.10 | 92.77 | 87.87 | 78.19 | 73.77 | 61.81 | 76.74 | |||||||||||||
1966 | 52.32 | 57.43 | 71.55 | 76.70 | 82.84 | 90.97 | 97.65 | 90.97 | 83.63 | 75.13 | 72.27 | 59.52 | 75.91 | |||||||||||||
1967 | 61.35 | 62.46 | 77.32 | 81.53 | 87.74 | 92.00 | 91.13 | 91.77 | 80.67 | 79.55 | 65.73 | 55.16 | 77.20 | |||||||||||||
1968 | 53.87 | 56.93 | 64.32 | 73.27 | 84.61 | 92.00 | 91.00 | 93.68 | 86.00 | a | 81.55 | 64.63 | 59.90 | 75.15 | ||||||||||||
1969 | 62.00 | 62.07 | 60.61 | 77.33 | 82.06 | 93.10 | 98.90 | 97.50 | a | 87.47 | 73.81 | 63.80 | 61.71 | 76.70 | ||||||||||||
1970 | 55.87 | 60.61 | 62.13 | 78.17 | 84.10 | 91.30 | 96.26 | 95.77 | 85.40 | 72.42 | 67.43 | 66.19 | 76.30 | |||||||||||||
1971 | 63.68 | 63.39 | 73.13 | 77.50 | 86.26 | 90.27 | 94.68 | 85.57 | a | 84.43 | 75.94 | 66.70 | 60.32 | 76.82 | ||||||||||||
1972 | 61.45 | 65.52 | 77.13 | 85.70 | 83.19 | 91.57 | 91.65 | 88.61 | 87.93 | 76.03 | 59.66 | a | 59.16 | 77.30 | ||||||||||||
1973 | 49.58 | 56.43 | 69.90 | 72.30 | 85.81 | 91.40 | 93.32 | 93.29 | 84.97 | 79.42 | 72.57 | 63.61 | 76.05 | |||||||||||||
1974 | 58.16 | 66.36 | 79.10 | 81.30 | 88.26 | 94.53 | 95.90 | 89.77 | 76.97 | 74.45 | 63.43 | 55.94 | 77.01 | |||||||||||||
1975 | 58.19 | 59.59 | a | 68.74 | 76.43 | 84.19 | 91.17 | 90.10 | 92.71 | 82.43 | 78.77 | 69.00 | 60.84 | 76.01 | ||||||||||||
1976 | 59.55 | 71.55 | 73.74 | 78.33 | 82.39 | 93.13 | 85.87 | 93.00 | 83.37 | 71.07 | a | 58.53 | 57.84 | 75.70 | ||||||||||||
1977 | 50.77 | 63.89 | 69.90 | 74.33 | 84.32 | 93.27 | 95.48 | 97.35 | 95.60 | 80.48 | 70.73 | 64.87 | 78.42 | |||||||||||||
1978 | 50.65 | 53.36 | 71.16 | 86.30 | 88.16 | 91.23 | 97.84 | 92.19 | 83.63 | 76.97 | 64.63 | 57.29 | 76.12 | |||||||||||||
1979 | 47.26 | 59.39 | 69.03 | 79.07 | 84.57 | a | 88.40 | 95.06 | 91.35 | 90.60 | 85.00 | 64.13 | 60.29 | 76.18 | ||||||||||||
1980 | 57.97 | 60.72 | 69.32 | 77.93 | 83.35 | 95.63 | 100.52 | 94.52 | 85.90 | 76.39 | 62.10 | 59.39 | 76.98 | |||||||||||||
1981 | 56.19 | 62.61 | 64.13 | 77.23 | 83.19 | 88.87 | 95.35 | 93.52 | 89.70 | 76.23 | 72.67 | 64.26 | 77.00 | |||||||||||||
1982 | 60.00 | 57.79 | ----- | z | 78.27 | 83.23 | 90.40 | 95.87 | 97.84 | 91.23 | 78.97 | a | 65.20 | 56.48 | 77.75 | a | ||||||||||
1983 | 56.00 | 61.96 | 70.42 | 75.53 | 88.42 | 89.33 | 95.42 | 97.61 | 91.27 | 79.29 | 68.30 | 48.29 | 76.82 | |||||||||||||
1984 | 50.94 | 64.72 | 71.19 | 79.93 | 88.81 | 92.90 | 95.23 | 95.74 | 86.47 | 72.71 | 62.63 | 59.23 | 76.71 | |||||||||||||
1985 | 51.90 | a | 55.36 | 69.35 | 80.77 | 89.16 | 89.73 | 94.03 | 96.61 | 86.70 | 75.65 | 71.45 | a | 57.58 | 76.52 | |||||||||||
1986 | 62.45 | 66.36 | 75.55 | 84.60 | 86.90 | 87.40 | 93.77 | 92.23 | 85.57 | 74.03 | 65.53 | 54.71 | 77.43 | |||||||||||||
1987 | 57.70 | a | 60.68 | 63.48 | 75.60 | 83.71 | 87.33 | 91.94 | 95.61 | 86.37 | 80.81 | 67.38 | a | 60.14 | c | 75.90 | ||||||||||
1988 | 53.48 | j | 61.28 | d | 72.42 | 81.53 | 84.19 | 92.03 | 90.55 | 94.57 | a | 87.33 | 80.03 | a | 72.17 | 59.65 | 79.61 | a | ||||||||
1989 | 60.97 | a | 55.79 | 71.45 | b | 81.23 | 92.87 | 92.14 | a | 95.03 | 90.48 | 83.55 | a | 76.65 | 66.27 | 48.43 | a | 76.24 | ||||||||
1990 | 59.13 | a | 64.46 | 63.37 | a | 72.37 | 80.65 | 94.37 | 85.40 | a | 92.75 | k | 87.97 | 77.42 | 70.59 | a | 56.55 | 73.84 | a | |||||||
1991 | 51.90 | a | 63.68 | 73.81 | 83.90 | a | 91.58 | 89.73 | d | 92.90 | 90.00 | b | 80.47 | 78.87 | a | 60.07 | 56.30 | a | 76.10 | |||||||
1992 | 53.90 | 63.45 | 72.13 | 76.00 | 81.79 | b | 89.93 | 93.32 | f | 90.77 | 90.93 | 82.94 | 64.86 | b | 58.94 | 75.06 | a | |||||||||
1993 | 55.33 | a | 60.93 | 70.20 | a | 80.50 | 88.03 | a | 91.64 | b | 95.16 | 94.26 | 85.37 | 77.26 | 62.77 | 61.26 | 76.89 | |||||||||
1994 | 58.06 | 60.82 | 72.68 | 81.50 | 83.81 | 98.79 | a | 100.16 | 96.81 | 86.60 | 77.63 | a | 67.73 | 60.90 | 78.79 | |||||||||||
1995 | 57.74 | 67.86 | 66.68 | ----- | z | 88.19 | 91.90 | 98.52 | 93.65 | 87.13 | 82.74 | 70.46 | b | 60.16 | 78.64 | a | ||||||||||
1996 | 59.48 | 67.48 | d | 68.30 | a | 81.90 | a | 94.81 | 98.13 | 98.00 | 92.03 | 83.13 | 78.58 | 65.86 | a | 65.14 | c | 79.40 | ||||||||
1997 | 55.31 | b | 56.11 | 70.74 | h | 70.37 | c | 82.60 | a | 89.33 | 96.81 | 96.10 | a | 90.53 | 78.97 | 65.03 | 56.50 | a | 76.15 | a | ||||||
1998 | 63.65 | 62.57 | 69.00 | 80.53 | 96.19 | 100.07 | 101.55 | 92.65 | 91.37 | 79.55 | 67.83 | 57.71 | 80.22 | |||||||||||||
1999 | 65.03 | 71.25 | 68.68 | 80.27 | 88.55 | ----- | z | 95.41 | b | 99.52 | 90.13 | 79.93 | a | 73.20 | 60.84 | 79.35 | a | |||||||||
2000 | 62.94 | 74.30 | b | 75.13 | 83.47 | 94.90 | 89.20 | 99.90 | a | 97.84 | 93.87 | 74.93 | a | 58.17 | 52.77 | a | 79.78 | |||||||||
2001 | 51.90 | 61.54 | b | 64.45 | 79.40 | 90.06 | 99.23 | 101.97 | b | 96.32 | 86.10 | a | 80.03 | a | 66.63 | 57.68 | 77.94 | |||||||||
2002 | 58.94 | 57.46 | 70.26 | 82.79 | a | 89.93 | a | 95.26 | c | 93.97 | 99.43 | a | 89.40 | 72.43 | a | 61.13 | 55.60 | a | 77.22 | |||||||
2003 | 58.26 | 57.48 | a | 71.77 | 83.93 | 92.90 | 90.37 | 96.13 | 95.00 | 84.53 | 78.03 | a | 65.37 | 61.94 | 77.98 | |||||||||||
2004 | 58.81 | 56.66 | 71.27 | a | 75.90 | a | 89.42 | 93.34 | a | 91.59 | b | 92.43 | a | 84.10 | 73.38 | e | 62.33 | 58.45 | 75.64 | |||||||
2005 | 60.55 | 59.75 | d | 68.23 | 80.95 | k | 87.65 | 94.10 | 95.84 | 91.42 | 90.93 | a | 76.97 | a | 70.90 | 59.71 | 77.82 | a | ||||||||
2006 | 65.74 | 64.29 | 73.03 | 82.75 | b | 91.90 | a | 96.37 | 97.38 | b | 98.00 | p | 83.07 | 76.03 | 69.20 | 55.68 | c | 77.77 | a | |||||||
2007 | 46.87 | a | 60.18 | 71.32 | 75.28 | a | 79.39 | 90.41 | a | 90.32 | 90.03 | 86.57 | 82.45 | 67.97 | 60.22 | d | 75.08 | |||||||||
2008 | 55.90 | 68.35 | c | 72.58 | g | 81.67 | 90.48 | 97.37 | 91.32 | 89.26 | 82.04 | c | 76.70 | a | 68.76 | a | 59.62 | b | 78.31 | a | ||||||
2009 | 60.00 | e | 67.88 | c | 71.58 | 78.79 | b | 86.29 | 94.00 | 95.65 | 97.29 | 84.41 | a | 73.87 | 70.69 | a | 53.83 | a | 77.86 | |||||||
2010 | 55.61 | 52.58 | d | 67.71 | 76.17 | 86.25 | c | 97.23 | 88.26 | 97.48 | 87.63 | 81.39 | 70.03 | 61.71 | 76.84 | |||||||||||
2011 | 55.97 | a | 60.30 | e | 78.03 | 88.60 | 90.42 | 100.93 | 99.23 | 98.90 | 91.86 | a | 78.97 | 68.30 | 51.03 | 80.21 | ||||||||||
2012 | 60.37 | a | 59.83 | 71.87 | 83.59 | c | 85.93 | a | 97.37 | 94.86 | c | 95.65 | 86.60 | 75.68 | 72.11 | b | 63.26 | 78.93 | ||||||||
2013 | 56.52 | 64.36 | 73.26 | 79.54 | b | 87.86 | b | 93.17 | 91.48 | 96.90 | 88.47 | 78.76 | b | 62.48 | a | 53.74 | 77.21 | |||||||||
2014 | 57.55 | b | 60.52 | a | 70.61 | 82.57 | 86.84 | 90.21 | a | 94.82 | c | 94.94 | 85.30 | 85.06 | 60.20 | e | 59.76 | b | 77.36 | |||||||
2015 | 50.06 | 58.11 | 65.61 | 79.67 | c | 84.19 | 87.20 | 94.38 | e | 99.43 | a | 92.90 | a | 79.69 | e | 64.57 | 61.83 | a | 76.47 | |||||||
2016 | 55.97 | 66.67 | b | 74.10 | b | 78.10 | 81.78 | d | 89.23 | d | 99.20 | a | 94.03 | a | 87.44 | c | 83.57 | c | 69.38 | d | 59.38 | g | 79.95 | a | ||
2017 | 59.97 | b | 70.74 | a | 78.75 | c | 81.17 | 88.13 | a | 97.00 | 96.93 | c | 91.80 | a | 89.39 | b | 78.33 | g | 71.57 | b | 56.68 | 80.19 | a | |||
2018 | 55.77 | 65.18 | 74.93 | d | 80.87 | 93.96 | c | 100.32 | b | 97.47 | a | 93.62 | b | 83.63 | 73.07 | b | 61.80 | e | 55.93 | a | 78.05 | |||||
2019 | 55.77 | a | 64.78 | a | 65.20 | a | 79.25 | b | 80.77 | 95.52 | a | 97.90 | 102.30 | a | 94.50 | b | 78.68 | 66.07 | a | 63.80 | a | 78.71 | ||||
2020 | 60.73 | a | 58.45 | 72.23 | 80.13 | 92.90 | b | 97.93 | 102.97 | 101.81 | 88.64 | e | 81.23 | a | 73.96 | b | 59.97 | a | 80.91 | |||||||
2021 | 53.00 | a | 55.23 | b | 73.19 | 76.32 | b | 82.93 | b | 92.30 | 92.21 | b | 92.70 | d | 93.43 | 84.48 | d | 71.32 | b | 74.82 | c | 78.50 | ||||
2022 | 58.90 | a | 57.15 | b | 73.65 | 86.33 | 96.62 | b | 100.03 | a | 102.06 | 96.04 | c | 90.19 | c | 78.97 | b | 63.34 | a | 56.86 | b | 80.01 | ||||
2023 | 61.80 | a | 59.00 | 72.29 | 81.54 | b | 87.93 | a | 99.14 | a | 100.10 | 101.48 | 94.59 | a | 80.23 | a | 65.00 | 61.24 | b | 80.36 | ||||||
2024 | 51.00 | 68.03 | 71.52 | b | 81.11 | c | 86.67 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.92 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.09 | 61.81 | 70.56 | 79.62 | 86.96 | 93.11 | 95.32 | 94.51 | 87.26 | 78.04 | 66.80 | 59.01 | 77.40 | |||||||||||||
S.D. | 4.39 | 4.78 | 4.24 | 3.69 | 4.17 | 3.70 | 3.80 | 3.47 | 3.84 | 3.28 | 4.08 | 4.23 | 1.47 | |||||||||||||
SKEW | -0.33 | 0.38 | -0.32 | -0.12 | 0.46 | 0.50 | -0.32 | 0.09 | 0.04 | 0.09 | -0.14 | 0.35 | 0.74 | |||||||||||||
MAX | 65.74 | 74.30 | 79.10 | 88.60 | 96.62 | 100.93 | 102.97 | 102.30 | 95.60 | 85.06 | 73.96 | 74.82 | 80.91 | |||||||||||||
MIN | 46.87 | 52.58 | 60.61 | 70.37 | 79.39 | 87.20 | 85.40 | 85.57 | 76.97 | 71.07 | 58.17 | 48.29 | 75.08 | |||||||||||||
YRS | 59 | 60 | 57 | 58 | 59 | 58 | 58 | 57 | 59 | 59 | 60 | 59 | 47 |