YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.55 | 83.13 | 72.34 | b | 65.19 | d | 55.45 | b | 72.93 | g | ||
1942 | 56.19 | d | 54.28 | c | 64.17 | g | 73.90 | a | 84.86 | c | 95.37 | 97.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.00 | f | ||
1943 | ----- | z | 64.96 | 68.50 | a | 80.43 | 85.48 | 90.93 | 93.48 | 93.45 | 87.97 | 75.65 | 68.07 | 55.55 | 78.59 | a | ||||||||||
1944 | 58.26 | 57.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.61 | 59.63 | 56.77 | 61.61 | g | |||||
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | 81.27 | a | 94.07 | 91.19 | 88.17 | a | 85.13 | 75.39 | 62.00 | 60.74 | 79.74 | d | ||||||
1947 | 51.97 | a | 64.93 | 67.54 | c | 74.97 | 85.68 | 90.17 | 94.28 | f | 90.10 | 88.87 | g | 78.55 | 59.88 | n | 49.42 | s | 75.49 | d | ||||||
1948 | 58.10 | b | 57.58 | c | ----- | z | ----- | z | ----- | z | 90.27 | 95.39 | 94.10 | 88.93 | 75.81 | 62.17 | 56.70 | a | 75.45 | c | ||||||
1949 | 44.55 | 58.32 | 66.77 | 75.93 | 82.65 | 89.30 | 90.94 | 91.19 | 87.40 | 74.90 | a | 73.73 | 55.94 | 74.30 | ||||||||||||
1950 | 58.10 | 66.07 | 69.74 | 78.23 | 81.13 | a | 90.67 | 87.61 | 91.16 | 83.97 | 84.06 | 73.17 | 67.39 | 77.61 | ||||||||||||
1951 | 58.06 | 60.21 | 65.42 | 71.83 | 83.68 | 91.30 | 95.61 | 89.45 | i | 89.17 | 77.79 | b | 63.55 | a | 54.61 | 73.75 | a | |||||||||
1952 | 58.48 | 59.41 | 59.94 | 73.97 | 83.42 | 89.63 | 90.97 | 89.87 | 87.50 | 81.19 | 59.97 | 55.55 | 74.16 | |||||||||||||
1953 | 64.19 | 60.46 | 67.94 | 74.30 | 77.97 | 92.10 | 91.71 | 88.87 | 88.43 | 75.84 | 69.23 | ----- | z | 77.37 | a | |||||||||||
1954 | 60.40 | a | 70.11 | 65.58 | 81.37 | 83.48 | 90.30 | 92.23 | 87.87 | 86.23 | 78.81 | 72.17 | 60.23 | 77.40 | ||||||||||||
1955 | 54.00 | 57.93 | 68.19 | 76.07 | 81.94 | 89.40 | 89.84 | 88.58 | 89.40 | 79.52 | 67.03 | 63.00 | 75.41 | |||||||||||||
1956 | 61.48 | 55.03 | 72.71 | 74.53 | 86.81 | 93.90 | 91.00 | 89.29 | 90.87 | 78.58 | 65.40 | 58.19 | 76.48 | |||||||||||||
1957 | 55.61 | 67.46 | 65.26 | 73.13 | 77.55 | 91.13 | 91.16 | 85.10 | 87.23 | 70.52 | 61.00 | 60.35 | 73.79 | |||||||||||||
1958 | 55.52 | 62.93 | 58.39 | 72.07 | 86.74 | 93.40 | 94.65 | 91.58 | 83.00 | 73.74 | 65.47 | 66.10 | 75.30 | |||||||||||||
1959 | 62.77 | 60.43 | 68.97 | 77.40 | 82.39 | 94.33 | 93.52 | 87.87 | 88.07 | 79.81 | 66.17 | 57.16 | 76.57 | |||||||||||||
1960 | 52.39 | 56.93 | 73.52 | 77.77 | 83.03 | 95.63 | 92.42 | 93.61 | 91.70 | 76.26 | 69.87 | 56.26 | 76.62 | |||||||||||||
1961 | 59.39 | 64.68 | 68.55 | 79.40 | 85.58 | 94.80 | 93.77 | 88.32 | 81.40 | 73.68 | 59.17 | ----- | z | 77.16 | a | |||||||||||
1962 | 53.77 | 63.89 | 63.61 | 82.67 | 83.97 | ----- | z | 91.77 | 96.29 | 87.07 | 78.58 | 68.90 | 57.55 | 75.28 | a | |||||||||||
1963 | 54.00 | 65.54 | 69.10 | 77.30 | 87.94 | 92.70 | 93.68 | 85.74 | 85.93 | 79.29 | 64.07 | 58.94 | 76.18 | |||||||||||||
1964 | 53.52 | 56.69 | 63.90 | 73.03 | 84.65 | 91.50 | 93.81 | 90.52 | 83.47 | 81.26 | 64.45 | a | 56.13 | 74.41 | ||||||||||||
1965 | 59.47 | a | 60.32 | 64.10 | 76.50 | 81.77 | a | 87.76 | a | 92.50 | a | 92.74 | 85.50 | 83.77 | 71.37 | 54.87 | 75.89 | |||||||||
1966 | 54.45 | 55.75 | 71.97 | 78.72 | a | 87.27 | a | 92.63 | ----- | z | 93.36 | c | 88.03 | 80.23 | 71.38 | a | 57.62 | e | 75.58 | a | ||||||
1967 | 61.68 | 66.36 | 74.35 | 75.31 | a | 84.90 | 90.60 | e | 96.97 | 89.52 | h | 86.50 | b | ----- | z | 74.13 | 60.35 | k | 78.98 | c | ||||||
1968 | ----- | z | 65.45 | g | 65.00 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.78 | c | 80.06 | 64.45 | a | 55.61 | 70.98 | h | ||
1969 | 59.74 | 59.61 | 63.74 | 75.73 | 81.68 | 89.43 | 91.10 | 91.48 | 84.57 | 74.48 | 63.30 | 58.48 | 74.45 | |||||||||||||
1970 | 56.26 | 62.36 | 62.42 | 69.93 | 82.90 | 88.63 | 92.16 | 89.00 | 84.77 | 71.39 | 68.07 | 60.13 | 74.00 | |||||||||||||
1971 | 60.65 | 62.11 | 70.90 | 73.40 | 79.80 | a | 90.77 | 95.35 | 87.32 | 84.37 | 70.65 | 59.13 | o | 52.55 | 75.26 | a | ||||||||||
1972 | 61.94 | 65.72 | 75.81 | 76.07 | 81.65 | 88.67 | 92.84 | 88.77 | 84.20 | 73.61 | 60.97 | 56.13 | a | 75.53 | ||||||||||||
1973 | 53.00 | a | 55.07 | ----- | z | 69.11 | b | 79.52 | 88.57 | ----- | z | 89.11 | c | 87.00 | 79.74 | 68.37 | 59.94 | 72.94 | b | |||||||
1974 | 56.90 | 62.25 | 70.10 | 73.67 | 84.42 | 95.54 | b | 89.58 | 88.13 | 84.43 | b | 72.94 | 63.57 | ----- | z | 76.50 | a | |||||||||
1975 | ----- | z | ----- | z | 64.03 | ----- | z | ----- | z | 89.18 | b | 87.87 | ----- | z | ----- | z | ----- | z | 58.82 | s | 58.58 | 74.92 | h | |||
1976 | 58.19 | ----- | z | 66.55 | 72.70 | 80.87 | 89.90 | 88.26 | 88.90 | 83.24 | a | ----- | z | 64.13 | ----- | z | 76.97 | c | ||||||||
1977 | 55.29 | 64.46 | 63.39 | 74.66 | a | 79.39 | 90.67 | c | 89.84 | 91.13 | a | 87.38 | a | 77.03 | a | ----- | z | 61.84 | 75.92 | a | ||||||
1978 | 55.52 | ----- | z | 66.87 | a | 74.30 | 81.26 | 92.90 | 92.90 | 87.65 | 84.50 | 78.45 | b | 62.73 | 52.97 | a | 75.46 | a | ||||||||
1979 | 48.87 | 59.07 | 64.23 | 73.77 | 79.03 | 87.43 | 92.45 | b | 87.06 | 86.50 | 80.81 | 61.47 | 60.03 | 73.39 | ||||||||||||
1980 | 56.16 | 60.59 | 61.87 | 73.37 | 78.16 | 94.43 | 94.68 | 89.41 | b | 87.00 | 74.74 | 66.40 | 65.48 | 75.19 | ||||||||||||
1981 | 58.94 | 64.93 | 63.32 | 77.50 | 80.29 | 93.60 | 91.29 | 89.13 | 84.73 | 75.52 | 70.17 | 63.61 | 76.09 | |||||||||||||
1982 | 57.42 | 60.43 | 65.68 | 74.13 | 79.52 | 89.73 | 91.81 | 89.13 | 85.20 | 76.94 | 61.03 | a | 53.74 | 73.73 | ||||||||||||
1983 | 58.55 | 58.89 | 61.83 | a | 66.20 | 78.39 | 86.53 | 91.45 | 87.45 | 86.27 | 73.10 | 62.57 | 56.03 | 72.27 | ||||||||||||
1984 | 57.90 | 62.41 | 68.65 | 72.52 | a | 86.77 | a | 87.10 | 88.35 | 85.90 | 84.50 | 68.48 | 63.30 | 54.58 | 73.37 | |||||||||||
1985 | 51.74 | 57.68 | 65.61 | 75.43 | 80.58 | 91.40 | 91.52 | 88.96 | e | 81.03 | 72.52 | 62.00 | 58.29 | 73.06 | ||||||||||||
1986 | 62.48 | 61.00 | 67.10 | 75.27 | 82.84 | 90.90 | 88.90 | 90.55 | 82.83 | 71.90 | 60.72 | a | 52.71 | 73.93 | ||||||||||||
1987 | 55.00 | 57.31 | b | 61.03 | 74.63 | 78.87 | 92.03 | 92.06 | 87.13 | 83.03 | 78.45 | 61.87 | 52.23 | a | 72.80 | |||||||||||
1988 | 54.68 | 62.52 | 67.13 | 71.47 | 81.90 | 90.90 | 91.55 | 85.35 | 82.00 | 77.39 | 64.67 | 54.45 | 73.67 | |||||||||||||
1989 | 53.74 | 62.07 | 71.94 | 81.43 | 85.81 | 93.53 | 93.55 | 90.61 | 86.57 | 73.48 | 66.63 | 56.97 | 76.36 | |||||||||||||
1990 | 54.94 | 56.75 | 64.71 | 75.07 | 80.26 | 96.77 | 88.97 | 86.80 | a | 83.90 | 76.23 | a | 63.86 | h | 49.43 | a | 73.98 | a | ||||||||
1991 | 53.39 | 62.29 | 59.45 | 72.62 | a | 81.61 | 88.60 | 90.23 | 87.87 | 81.77 | 78.87 | 61.10 | 52.45 | 72.52 | ||||||||||||
1992 | 51.26 | 57.86 | 63.00 | 76.13 | 76.35 | 87.23 | 90.71 | 87.34 | b | 87.03 | 78.10 | 58.83 | 51.03 | 72.07 | ||||||||||||
1993 | 52.90 | 54.89 | 66.68 | 74.87 | 82.48 | 92.10 | 92.94 | 87.57 | a | 85.57 | 74.00 | 62.27 | 56.19 | 73.54 | ||||||||||||
1994 | 58.68 | 58.54 | b | 66.65 | 73.43 | 82.35 | 96.86 | a | 95.10 | 93.65 | 86.27 | 73.68 | 59.83 | 56.23 | 75.10 | |||||||||||
1995 | 52.83 | a | 63.89 | 64.74 | 70.60 | 77.81 | 89.47 | 95.16 | 93.10 | 85.97 | 80.33 | g | 69.57 | 57.84 | 74.63 | a | ||||||||||
1996 | 60.09 | i | 64.24 | 67.10 | a | 78.00 | n | 87.87 | 94.10 | 91.82 | i | 89.07 | a | 80.93 | 73.11 | d | 64.11 | b | 58.00 | 75.39 | c | |||||
1997 | 51.10 | 58.52 | a | 69.87 | 69.77 | 84.52 | 89.83 | 93.03 | 90.77 | 88.13 | 74.26 | 64.20 | 50.06 | 73.67 | ||||||||||||
1998 | 56.65 | 54.07 | 62.39 | 64.94 | n | 81.55 | 91.74 | c | 91.80 | a | 90.06 | 88.59 | a | ----- | z | 66.33 | 57.74 | 74.09 | b | |||||||
1999 | 61.03 | 66.00 | 69.76 | b | 71.00 | 83.23 | a | 91.82 | h | 88.48 | 88.13 | 84.67 | 77.91 | h | 71.96 | c | 55.35 | 73.96 | b | |||||||
2000 | 61.68 | 64.96 | c | 66.42 | 79.41 | a | 91.40 | k | 92.66 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.03 | g | ||
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | 70.64 | n | 68.16 | 80.57 | 85.90 | a | 97.21 | a | 92.90 | 90.94 | 84.41 | a | 73.70 | a | 65.83 | 54.48 | 79.41 | b | ||||||
2003 | 65.32 | 57.68 | 65.72 | b | 73.17 | 85.77 | a | 92.60 | 98.80 | a | 92.06 | 88.43 | 81.80 | a | 64.83 | 57.87 | 77.01 | |||||||||
2004 | 56.29 | 56.48 | 70.65 | 70.57 | 84.29 | 91.93 | 92.81 | 87.37 | a | 84.00 | 73.10 | 59.59 | a | 55.68 | 73.56 | |||||||||||
2005 | 57.16 | 55.61 | 63.42 | 74.23 | 84.07 | a | 91.30 | 95.27 | a | 88.10 | 85.77 | 76.39 | 69.37 | 60.94 | 75.13 | |||||||||||
2006 | 61.71 | 65.36 | 65.03 | 77.43 | 85.06 | 92.30 | 89.23 | 84.23 | 78.60 | 73.87 | 68.53 | 58.26 | 74.97 | |||||||||||||
2007 | 54.03 | 62.07 | a | 69.93 | b | 73.63 | 80.00 | b | 91.18 | b | 89.58 | 87.50 | a | 83.83 | 78.24 | b | 70.60 | 55.65 | 74.69 | |||||||
2008 | 54.81 | 61.72 | 67.77 | a | 74.31 | a | 80.00 | 90.93 | 86.37 | a | 87.32 | 82.40 | 77.55 | 68.33 | 57.45 | 74.08 | ||||||||||
2009 | 62.45 | 64.82 | 69.26 | 73.97 | 82.71 | 84.63 | 91.77 | 89.80 | a | 82.93 | 74.74 | 68.77 | 53.97 | 74.99 | ||||||||||||
2010 | 55.45 | 57.36 | 64.97 | 72.80 | 79.71 | 90.03 | 88.97 | a | 87.77 | 86.87 | 76.61 | 65.07 | 64.07 | a | 74.14 | |||||||||||
2011 | 59.13 | 60.07 | 72.84 | 77.17 | a | 78.62 | g | 92.75 | f | 91.40 | a | 90.65 | 85.50 | 77.84 | 63.50 | b | 53.35 | 73.15 | b | |||||||
2012 | 61.73 | a | 61.45 | 69.16 | 79.30 | c | 84.03 | 93.65 | g | 87.36 | f | 89.81 | 86.03 | 80.41 | b | 69.09 | g | 59.15 | d | 74.56 | c | |||||
2013 | 53.90 | 58.28 | c | 68.92 | f | 75.19 | d | 80.74 | d | 94.07 | a | 86.32 | f | 87.30 | d | 81.36 | b | 75.00 | a | 64.64 | b | 56.21 | c | 72.67 | b | |
2014 | 63.79 | b | 65.32 | 68.56 | d | 74.43 | b | 80.43 | c | 92.43 | b | 90.32 | f | 86.29 | g | 84.08 | f | 76.96 | g | 66.77 | d | 58.89 | d | 71.33 | d | |
2015 | 59.72 | f | 68.11 | a | 70.36 | f | 72.31 | n | 74.45 | k | 88.70 | j | 87.00 | f | 90.08 | e | 85.66 | a | 75.21 | b | ----- | z | 57.65 | e | 75.34 | g |
2016 | 56.55 | b | 68.46 | c | 71.14 | b | 73.62 | f | 79.76 | j | 92.25 | b | 92.19 | e | 86.25 | g | 83.29 | b | 79.45 | i | 66.23 | d | 60.30 | d | 73.80 | d |
2017 | 55.37 | d | 64.40 | c | 73.93 | a | 75.44 | c | 80.43 | a | 93.32 | b | 89.65 | e | 86.81 | d | 84.57 | 81.23 | a | 76.04 | e | 62.70 | a | 76.99 | ||
2018 | 63.12 | f | 62.92 | b | 69.52 | 80.00 | a | 85.96 | d | 94.63 | 90.76 | b | 88.50 | a | 87.25 | f | 69.88 | f | 64.07 | b | 56.45 | b | 76.98 | c | ||
2019 | 57.86 | b | 55.54 | b | 67.31 | b | 75.33 | 76.88 | f | 88.63 | c | 91.69 | b | 90.62 | g | 84.31 | a | 76.61 | c | 64.85 | d | 56.58 | 71.87 | b | ||
2020 | 57.86 | b | 62.07 | 66.37 | a | 74.24 | a | 84.96 | d | 90.16 | k | 92.50 | a | 95.10 | a | 88.00 | 81.61 | c | 68.85 | d | 58.16 | f | 77.16 | b | ||
2021 | 61.77 | i | 62.29 | g | 67.84 | 77.73 | h | 84.78 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.84 | k | |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | 83.00 | v | 92.94 | l | 100.95 | k | 93.06 | 90.12 | e | 83.55 | 68.10 | 61.29 | n | 83.71 | h | |||
2024 | 56.68 | l | 62.78 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.92 | 61.07 | 66.98 | 74.98 | 82.50 | 91.46 | 91.96 | 89.41 | 85.46 | 76.60 | 65.65 | 57.30 | 74.74 | |||||||||||||
S.D. | 3.86 | 3.87 | 3.65 | 3.13 | 2.78 | 2.58 | 2.44 | 2.46 | 2.51 | 3.40 | 4.01 | 3.60 | 1.44 | |||||||||||||
SKEW | -0.23 | 0.10 | 0.06 | 0.15 | -0.01 | 0.03 | 0.29 | 0.55 | -0.01 | 0.12 | 0.42 | 0.50 | 0.20 | |||||||||||||
MAX | 65.32 | 70.11 | 75.81 | 82.67 | 87.94 | 97.21 | 98.80 | 96.29 | 91.70 | 84.06 | 76.04 | 67.39 | 77.61 | |||||||||||||
MIN | 44.55 | 54.07 | 58.39 | 66.20 | 76.35 | 84.63 | 86.37 | 84.23 | 78.60 | 68.48 | 58.83 | 49.43 | 72.07 | |||||||||||||
YRS | 69 | 71 | 70 | 68 | 68 | 69 | 66 | 69 | 72 | 68 | 70 | 69 | 41 |