YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | 85.77 | 97.77 | 94.35 | 97.13 | 89.07 | 77.84 | 61.00 | a | 58.77 | 82.71 | d | |||||||
1930 | 47.39 | 68.93 | 62.97 | a | 80.90 | 79.60 | a | 89.00 | a | 96.68 | 96.77 | 95.20 | 78.23 | 64.63 | 57.35 | 76.47 | ||||||||||
1931 | 58.58 | 62.68 | 72.37 | a | ----- | z | ----- | z | 96.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.46 | h | |||
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 94.74 | 97.84 | 88.53 | 82.32 | 69.83 | 57.71 | 81.83 | f | ||||||
1963 | 54.87 | a | 64.46 | 74.29 | 85.76 | a | 88.68 | 93.53 | 97.13 | 96.16 | 89.70 | 84.10 | 68.57 | 52.19 | 79.12 | |||||||||||
1964 | 57.32 | 56.52 | 70.68 | 82.13 | 89.55 | 93.83 | 97.16 | 97.97 | 83.73 | 78.16 | 69.57 | 59.77 | 78.03 | |||||||||||||
1965 | 61.08 | g | 55.48 | g | 63.03 | 83.30 | 86.90 | k | 91.50 | 96.29 | 92.00 | 87.20 | 79.59 | i | 71.33 | 61.29 | 80.74 | d | ||||||||
1966 | 52.87 | 57.39 | 72.74 | 78.03 | 84.39 | 90.87 | 97.90 | 89.16 | 86.70 | 75.97 | 73.13 | 58.16 | 76.44 | |||||||||||||
1967 | 61.42 | 66.11 | 78.00 | 85.37 | k | 89.23 | e | 93.97 | 92.55 | 91.03 | 82.60 | 79.90 | 66.53 | 55.00 | 77.85 | a | ||||||||||
1968 | 56.37 | a | 58.85 | b | 65.29 | g | ----- | z | ----- | z | 94.73 | 89.42 | 91.05 | i | 83.53 | 79.13 | 63.07 | 55.17 | a | 72.53 | d | |||||
1969 | 60.23 | e | 59.71 | d | 63.90 | k | 79.03 | 88.74 | 95.87 | 100.52 | 99.77 | 90.27 | 75.68 | 65.54 | b | 62.52 | b | 79.81 | a | |||||||
1970 | 59.19 | 63.32 | 65.31 | b | 80.17 | 88.55 | 92.90 | 97.58 | 97.68 | 87.40 | 74.42 | 70.30 | 70.30 | d | 78.93 | |||||||||||
1971 | 65.87 | 66.44 | a | 76.84 | 80.23 | 89.16 | 93.73 | 98.07 | c | 88.20 | f | 86.97 | 77.93 | b | 71.03 | 62.94 | 79.02 | a | ||||||||
1972 | 65.83 | a | 67.07 | b | 80.42 | 88.08 | d | 85.65 | 95.10 | a | 94.97 | b | ----- | z | 89.53 | 77.68 | 62.70 | 58.77 | e | 78.71 | a | |||||
1973 | 53.30 | a | 58.52 | a | 71.74 | 75.77 | 88.26 | 95.67 | 94.32 | 95.87 | 87.77 | 82.23 | 74.24 | a | 65.41 | d | 78.59 | |||||||||
1974 | 62.55 | 70.50 | 84.87 | 84.40 | 95.03 | 97.30 | 98.17 | b | 93.73 | a | 81.30 | 78.68 | 69.93 | 62.35 | 81.57 | |||||||||||
1975 | 62.94 | 67.50 | 75.06 | 82.80 | 90.52 | 98.24 | a | 93.48 | 95.84 | 87.10 | a | 82.84 | 73.77 | 65.10 | 81.27 | |||||||||||
1976 | 64.77 | e | 76.24 | 76.70 | a | 83.40 | 85.81 | 95.67 | 89.84 | 95.67 | a | 86.60 | 75.57 | a | 63.40 | 62.47 | a | 79.68 | ||||||||
1977 | 59.06 | 69.36 | 75.71 | 81.03 | 90.77 | 97.60 | 99.00 | 100.13 | 97.57 | 83.50 | a | 75.00 | 70.94 | 83.31 | ||||||||||||
1978 | 57.13 | 61.43 | 77.50 | a | 88.50 | 92.32 | 95.33 | 99.60 | a | 94.50 | e | 85.33 | 79.40 | a | 69.00 | 63.16 | 80.27 | |||||||||
1979 | 54.48 | 65.79 | 73.90 | 83.80 | 89.45 | b | 93.10 | 96.68 | 95.23 | 90.50 | 88.42 | 69.23 | 63.45 | 80.34 | ||||||||||||
1980 | 63.90 | a | 67.62 | 75.29 | 83.23 | 88.00 | 100.93 | a | 101.61 | 96.42 | 89.23 | 77.97 | 65.93 | 65.00 | 81.26 | |||||||||||
1981 | 60.48 | 66.82 | 70.32 | 81.20 | 86.48 | j | 93.00 | 96.58 | 93.61 | 92.70 | 80.29 | 77.73 | 72.30 | h | 81.27 | b | ||||||||||
1982 | 68.21 | b | 66.48 | a | 80.10 | 82.70 | 87.53 | a | 97.33 | 99.19 | 98.69 | b | 93.97 | 83.29 | 68.34 | a | 59.00 | 82.07 | ||||||||
1983 | 61.74 | 67.85 | a | 76.03 | a | 80.62 | a | 92.73 | a | 97.17 | 99.61 | 98.94 | 93.40 | 83.87 | a | 74.64 | b | 58.31 | b | 82.08 | ||||||
1984 | 56.26 | 70.18 | a | 77.11 | d | 83.60 | 91.94 | 95.20 | 96.71 | 97.10 | a | 88.63 | 76.84 | 67.53 | 64.35 | 80.45 | ||||||||||
1985 | 58.17 | a | 63.75 | 74.39 | 85.13 | 93.10 | 93.80 | 95.71 | 98.00 | a | 88.00 | a | 77.77 | 73.30 | 63.32 | 80.37 | ||||||||||
1986 | 65.65 | 70.89 | 78.00 | 87.73 | 89.16 | 89.41 | a | 95.32 | 92.55 | 87.23 | 75.26 | 66.70 | 56.58 | 79.54 | ||||||||||||
1987 | 60.74 | 63.21 | 67.68 | 77.63 | 84.20 | a | 89.07 | 93.07 | a | 94.16 | 87.93 | 82.35 | 68.80 | 62.10 | 77.58 | |||||||||||
1988 | 56.48 | 66.86 | 74.55 | 82.17 | 85.48 | 93.03 | 91.52 | 93.42 | 87.97 | a | 81.52 | 74.07 | 61.45 | 79.04 | ||||||||||||
1989 | 64.77 | 61.57 | 78.40 | a | 85.07 | 93.93 | a | 94.34 | a | 97.03 | 93.90 | 87.50 | 83.23 | a | 71.60 | 57.33 | a | 80.72 | ||||||||
1990 | 64.11 | c | 70.26 | a | 70.94 | 80.70 | 89.47 | a | 98.17 | 89.16 | 90.48 | 85.97 | a | 81.00 | b | 69.93 | a | 61.84 | 79.33 | |||||||
1991 | 56.45 | 66.67 | a | 74.62 | b | 82.28 | a | 91.13 | 95.00 | 92.45 | 91.40 | a | 81.85 | d | 79.65 | 65.83 | g | 59.58 | e | 79.19 | a | |||||
1992 | 56.20 | a | 66.50 | a | 74.07 | a | 83.30 | c | 84.83 | y | 92.70 | 93.35 | 90.67 | a | 89.57 | 83.55 | 66.04 | g | 60.35 | n | 81.10 | c | ||||
1993 | 60.46 | e | 66.50 | f | 74.70 | d | 84.21 | b | 88.30 | d | 93.43 | 96.45 | 96.06 | 87.04 | b | 80.03 | b | 65.92 | d | 63.86 | c | 80.95 | a | |||
1994 | 63.26 | d | 66.56 | c | 76.52 | d | 83.92 | f | 88.70 | d | 100.53 | 98.29 | c | 96.30 | a | 89.00 | b | 82.26 | d | 72.12 | d | 64.79 | b | 81.67 | a | |
1995 | 61.73 | e | 72.44 | j | 71.96 | e | 83.41 | c | 87.79 | b | 92.79 | b | 97.81 | 94.77 | 89.07 | 85.28 | f | 73.38 | a | 63.35 | 81.61 | b | ||||
1996 | 64.73 | a | 71.96 | c | 72.46 | g | 84.04 | e | 97.31 | b | 97.38 | a | 97.03 | b | 91.61 | c | 84.97 | a | 80.35 | 71.56 | e | 66.03 | a | 82.45 | a | |
1997 | 62.13 | h | 59.29 | 75.45 | 76.24 | a | 86.75 | c | 91.48 | a | 95.65 | 95.93 | a | 90.30 | 80.77 | a | 68.42 | d | 60.15 | d | 80.04 | a | ||||
1998 | 67.39 | 65.78 | a | 71.96 | g | 81.80 | 97.30 | a | 101.27 | 100.06 | 93.52 | 93.57 | 81.00 | c | 71.30 | c | 60.92 | e | 83.08 | a | ||||||
1999 | 69.79 | c | 75.17 | e | 73.83 | a | 84.79 | a | 90.13 | a | 92.20 | 94.50 | a | 97.87 | 90.04 | b | 82.68 | 75.96 | c | 63.23 | e | 82.52 | ||||
2000 | 67.60 | a | 73.92 | e | ----- | z | 83.24 | a | 94.89 | c | 89.32 | b | 98.13 | a | 96.37 | a | 93.71 | b | 75.56 | f | 60.28 | e | 54.07 | a | 81.15 | b |
2001 | 54.76 | b | 65.30 | a | 65.29 | c | 82.23 | d | 90.85 | d | 96.90 | a | 98.10 | a | 94.38 | b | 87.68 | e | 80.47 | a | 68.70 | c | 58.79 | b | 78.62 | |
2002 | 61.93 | c | 61.44 | c | 70.62 | e | 82.62 | a | 88.18 | c | 93.96 | e | 92.86 | c | 97.04 | g | 88.16 | e | 72.41 | b | 61.19 | c | 58.55 | b | 75.63 | a |
2003 | 60.97 | a | 62.46 | 74.00 | c | 83.96 | e | 89.80 | a | 93.33 | f | 92.74 | d | 95.43 | c | 86.65 | d | 78.96 | d | 65.08 | f | 64.21 | g | 80.55 | c | |
2004 | 62.53 | n | 59.17 | f | 72.69 | e | 80.52 | e | 88.38 | b | 94.35 | d | 92.76 | b | ----- | z | 82.86 | b | ----- | z | ----- | z | 58.36 | c | 81.42 | e |
2005 | 61.36 | c | 58.79 | 70.29 | 79.90 | 85.39 | h | 91.90 | 94.68 | 90.32 | 92.07 | 76.68 | 72.13 | ----- | z | 78.81 | b | |||||||||
2006 | 68.28 | b | 66.11 | 74.20 | a | 86.63 | 92.48 | d | 96.69 | q | 96.18 | t | 92.15 | d | 84.36 | e | 80.14 | i | ----- | z | ----- | z | 80.60 | e | ||
2007 | ----- | z | ----- | z | ----- | z | ----- | z | 88.83 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.87 | p | 93.03 | a | 84.07 | 79.26 | 70.37 | 64.00 | 78.14 | g | ||||
2009 | 64.32 | 71.30 | a | 74.23 | 82.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.09 | h | |||
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.19 | n | 81.20 | a | 72.00 | 64.97 | a | 72.72 | i | |
2011 | 59.77 | 64.54 | 80.23 | 89.41 | c | 91.03 | 102.17 | 99.55 | 100.76 | b | 93.90 | 82.71 | 71.03 | 52.35 | 82.29 | |||||||||||
2012 | 62.68 | 63.15 | c | ----- | z | 92.09 | s | 88.33 | a | 98.07 | 94.05 | l | 95.61 | m | 90.43 | 81.94 | o | ----- | z | ----- | z | 80.53 | g | |||
2013 | 57.06 | 65.68 | 74.90 | 81.67 | 90.03 | 96.58 | d | 92.10 | 97.30 | a | 89.10 | 80.74 | 63.67 | 57.19 | 78.84 | |||||||||||
2014 | 60.74 | 65.32 | 73.00 | 82.14 | b | 88.48 | 94.73 | 94.84 | 95.42 | 84.40 | 84.39 | 63.57 | 60.20 | a | 78.94 | |||||||||||
2015 | 52.84 | 61.32 | 67.77 | 79.93 | 84.61 | 91.10 | 97.23 | 98.84 | 92.24 | a | 80.43 | a | 67.13 | 62.84 | 78.02 | |||||||||||
2016 | 58.61 | 68.76 | 76.10 | 80.67 | 86.87 | 91.43 | 98.90 | 92.87 | 88.73 | 85.48 | 70.43 | 60.10 | 79.91 | |||||||||||||
2017 | 61.77 | 72.21 | 79.07 | c | 84.44 | l | 88.07 | a | 97.43 | g | ----- | z | 90.33 | p | 89.77 | 79.52 | 74.17 | 59.90 | 75.56 | d | ||||||
2018 | 58.00 | b | 67.11 | 76.42 | 83.60 | 95.03 | a | 98.50 | b | 97.42 | 96.52 | 84.90 | 74.00 | 64.47 | 57.77 | 79.48 | ||||||||||
2019 | 60.42 | 66.39 | 68.13 | 80.57 | 83.32 | 94.33 | 96.94 | 101.29 | 93.00 | 80.50 | a | 67.70 | 64.26 | 79.74 | ||||||||||||
2020 | 62.68 | 60.69 | 73.52 | 80.83 | 92.61 | 96.30 | 101.00 | 99.71 | 86.70 | 83.33 | a | 75.53 | 62.84 | 81.31 | ||||||||||||
2021 | 56.55 | 56.68 | 73.35 | 76.00 | 86.90 | 94.17 | 92.94 | 92.42 | 92.30 | 84.74 | 71.83 | 72.74 | 79.22 | |||||||||||||
2022 | 59.35 | 58.75 | 74.96 | f | 84.87 | 94.65 | 98.95 | j | 98.58 | 94.45 | 88.90 | 78.74 | 63.83 | 60.71 | 78.28 | b | ||||||||||
2023 | 70.00 | l | 68.56 | c | 76.23 | 82.13 | 88.87 | 100.20 | 101.26 | 101.65 | 98.07 | 83.52 | 69.57 | 66.71 | 85.16 | a | ||||||||||
2024 | 61.94 | 72.93 | 74.90 | 84.60 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.59 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.46 | 65.61 | 73.91 | 82.46 | 89.40 | 94.90 | 96.13 | 95.46 | 88.63 | 80.23 | 69.23 | 61.26 | 79.86 | |||||||||||||
S.D. | 4.47 | 4.70 | 4.28 | 2.90 | 3.48 | 3.11 | 2.99 | 3.00 | 3.63 | 3.17 | 4.16 | 4.16 | 1.66 | |||||||||||||
SKEW | -0.25 | 0.02 | -0.51 | -0.05 | 0.06 | 0.23 | -0.37 | 0.02 | 0.35 | -0.14 | -0.27 | 0.26 | -0.00 | |||||||||||||
MAX | 69.79 | 76.24 | 84.87 | 89.41 | 97.31 | 102.17 | 101.61 | 101.65 | 98.07 | 88.42 | 77.73 | 72.74 | 83.31 | |||||||||||||
MIN | 47.39 | 56.52 | 62.97 | 75.77 | 79.60 | 89.00 | 89.16 | 89.16 | 81.30 | 72.41 | 60.28 | 52.19 | 76.44 | |||||||||||||
YRS | 57 | 57 | 54 | 55 | 54 | 56 | 57 | 54 | 61 | 56 | 56 | 56 | 33 |