YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | 79.84 | 89.45 | a | 93.45 | 92.90 | 90.23 | 75.87 | 71.27 | 50.41 | b | 80.43 | d | ||||||
1933 | 52.12 | f | 54.08 | c | 66.90 | b | 68.29 | f | 75.68 | c | 90.90 | 96.77 | 94.13 | 89.69 | a | 80.35 | 69.93 | 63.17 | a | 78.16 | b | |||||
1934 | 60.23 | 63.81 | a | 76.32 | c | 80.12 | e | 88.07 | c | 87.21 | a | 97.19 | 91.39 | 87.48 | a | 80.81 | 66.03 | a | 59.83 | a | 78.21 | |||||
1935 | 56.73 | a | 60.75 | d | 59.00 | 70.00 | a | 73.74 | 92.67 | 94.74 | 90.06 | 86.00 | a | 70.35 | 55.64 | b | 51.90 | 71.80 | ||||||||
1936 | 53.28 | b | 52.39 | a | 64.07 | a | 74.93 | b | 84.48 | b | 93.30 | 93.77 | a | 90.16 | 81.93 | 72.00 | 62.00 | a | 53.87 | 73.01 | ||||||
1937 | 38.61 | 54.71 | 60.52 | 69.77 | 80.32 | 86.52 | a | 94.70 | a | 95.42 | 90.27 | 81.35 | 70.45 | a | 60.00 | b | 73.55 | |||||||||
1938 | 59.77 | 56.40 | c | 60.45 | 73.81 | c | 81.00 | b | 90.20 | 94.03 | b | 92.42 | 90.30 | 76.00 | 63.57 | 58.84 | 74.73 | |||||||||
1939 | 53.62 | b | 47.61 | 65.77 | 75.60 | 83.42 | 91.73 | 96.55 | 92.16 | 82.10 | a | 75.73 | a | 67.83 | 65.74 | 74.82 | ||||||||||
1940 | 57.39 | 58.00 | a | 67.52 | 73.43 | b | 85.81 | 94.27 | 96.20 | a | 93.35 | 85.03 | a | 76.29 | 63.30 | 58.68 | 75.77 | |||||||||
1941 | 53.71 | 58.46 | 61.73 | a | 62.79 | a | 79.16 | 87.27 | 93.42 | 89.26 | 83.79 | a | 69.42 | 68.37 | 55.97 | 71.95 | ||||||||||
1942 | 51.93 | b | 51.11 | a | 62.52 | f | 70.37 | 80.48 | b | 91.23 | 98.74 | 92.19 | 89.57 | 76.61 | 70.27 | 62.35 | 75.90 | a | ||||||||
1943 | 57.68 | 68.07 | 66.58 | 76.80 | 84.39 | 89.79 | k | 96.58 | 90.48 | 91.00 | 77.20 | a | 69.53 | 56.65 | 75.91 | a | ||||||||||
1944 | 56.43 | a | 53.52 | 61.63 | a | 69.43 | 79.74 | 86.50 | 94.40 | a | 96.45 | 88.31 | a | 79.68 | 60.60 | 59.55 | 73.85 | |||||||||
1945 | 57.52 | 58.43 | 58.48 | 71.73 | 79.13 | 88.40 | 95.29 | 93.23 | 91.77 | 77.29 | 68.73 | 57.23 | 74.77 | |||||||||||||
1946 | 55.90 | a | 60.46 | 68.81 | 79.13 | 82.26 | 94.50 | 95.19 | 92.74 | 88.23 | 74.00 | 63.27 | 63.87 | 76.53 | ||||||||||||
1947 | 56.77 | 66.57 | 67.65 | 73.50 | 85.32 | 89.52 | a | 97.90 | 90.55 | b | 90.37 | 80.19 | 62.10 | 55.32 | 76.31 | |||||||||||
1948 | 62.90 | 57.31 | 60.90 | a | 75.10 | a | 83.53 | a | 90.69 | a | 95.68 | 93.65 | 89.93 | 77.61 | 62.57 | 55.61 | 75.46 | |||||||||
1949 | 41.39 | 53.18 | 63.29 | 75.63 | 79.94 | 89.83 | 93.77 | 94.55 | 89.73 | 73.16 | 75.07 | 55.90 | 73.79 | |||||||||||||
1950 | 54.13 | 64.36 | 66.87 | 77.93 | 81.10 | 91.57 | 90.39 | 93.69 | e | 85.03 | 85.16 | 72.87 | 67.19 | 77.52 | ||||||||||||
1951 | 57.23 | 59.75 | 64.32 | 71.77 | 81.45 | 89.37 | 97.68 | 90.16 | 89.80 | 76.90 | 63.27 | 53.48 | 74.60 | |||||||||||||
1952 | 54.16 | 57.72 | 55.00 | 70.57 | 83.84 | 89.63 | 94.94 | 94.19 | 91.10 | 86.19 | 60.30 | 55.42 | 74.42 | |||||||||||||
1953 | 63.42 | 60.18 | 66.52 | 71.13 | 74.71 | 91.57 | 93.81 | 92.29 | 92.97 | 78.52 | 69.34 | a | 57.58 | 76.00 | ||||||||||||
1954 | 58.19 | 68.00 | 62.25 | g | 77.67 | 83.45 | 89.37 | c | 95.58 | 90.26 | 89.30 | ----- | z | 73.45 | a | 60.77 | 78.60 | b | ||||||||
1955 | 50.32 | 56.32 | 66.26 | 71.33 | 79.42 | e | 89.70 | 90.23 | 89.35 | 90.17 | 82.65 | 66.40 | 61.81 | 74.50 | ||||||||||||
1956 | 61.00 | 54.83 | 70.70 | a | 71.43 | 84.23 | 94.37 | 93.35 | 91.65 | 94.39 | b | 77.19 | 67.30 | 60.03 | 76.71 | |||||||||||
1957 | 53.03 | a | 65.61 | 64.21 | c | 70.03 | 75.94 | 92.67 | 96.27 | a | 91.00 | 90.30 | 72.16 | 59.63 | 62.23 | 74.42 | ||||||||||
1958 | 59.13 | 61.39 | 55.52 | 70.73 | 86.61 | 92.34 | a | 96.87 | a | 94.73 | e | 85.57 | 77.81 | 65.57 | 66.61 | 76.07 | ||||||||||
1959 | 61.19 | 56.29 | 69.19 | 77.33 | 79.74 | 94.73 | 97.29 | 87.60 | a | 86.33 | 78.97 | 67.13 | 59.03 | 76.24 | ||||||||||||
1960 | 51.26 | 53.52 | 70.26 | 75.90 | 82.52 | 96.83 | 98.45 | 94.06 | 89.93 | 73.13 | 66.93 | 57.58 | 75.86 | |||||||||||||
1961 | 61.71 | 63.32 | 64.35 | 74.93 | 81.26 | 95.20 | 96.03 | 91.19 | 83.67 | 77.13 | 61.43 | 54.74 | 75.41 | |||||||||||||
1962 | 55.81 | 57.93 | 59.32 | 79.80 | 80.41 | b | 90.93 | 95.06 | 97.16 | 86.13 | 77.57 | a | 70.83 | 61.26 | 76.02 | |||||||||||
1963 | 54.55 | 66.00 | 63.45 | 69.77 | 84.23 | 86.80 | 98.03 | 88.35 | 88.87 | 80.65 | 64.53 | 62.23 | 75.62 | |||||||||||||
1964 | 54.61 | 56.48 | 60.37 | a | 69.27 | 80.32 | 88.43 | 95.65 | 88.42 | 85.33 | 83.45 | 60.60 | 55.45 | 73.20 | ||||||||||||
1965 | 58.71 | 59.29 | 59.77 | 67.30 | 76.23 | 84.00 | 94.26 | 93.68 | 82.60 | 82.84 | 66.90 | 55.10 | 73.39 | |||||||||||||
1966 | 53.32 | 54.21 | 68.16 | 75.57 | 84.16 | 90.90 | 95.84 | 92.77 | 85.97 | 77.45 | 67.73 | 56.94 | 75.25 | |||||||||||||
1967 | 59.03 | 64.00 | 67.55 | 65.50 | 80.58 | 86.97 | 95.26 | 93.77 | 87.27 | 82.26 | 70.97 | 46.90 | 75.00 | |||||||||||||
1968 | 55.03 | 64.93 | 65.33 | a | 70.33 | 81.48 | 93.90 | 93.65 | 89.32 | 89.40 | 79.87 | 65.97 | 55.94 | 75.43 | ||||||||||||
1969 | 58.29 | 55.89 | 61.61 | 74.03 | 84.42 | 88.23 | 96.06 | 97.71 | 89.40 | 73.39 | 64.87 | 60.74 | 75.39 | |||||||||||||
1970 | 57.68 | 64.75 | 62.26 | 68.87 | 84.87 | 92.77 | 97.87 | 94.48 | 85.27 | 73.73 | a | 68.20 | 57.61 | 75.70 | ||||||||||||
1971 | 61.06 | 61.11 | 69.81 | 71.83 | 76.77 | 91.83 | 98.61 | 90.71 | 89.20 | 71.39 | 65.53 | 51.23 | 74.92 | |||||||||||||
1972 | 59.74 | 66.55 | 76.74 | 75.67 | 82.77 | 91.23 | 98.97 | a | 92.13 | 87.57 | 69.00 | i | 59.73 | 54.52 | 76.87 | a | ||||||||||
1973 | 53.43 | a | 56.11 | a | 53.93 | a | 69.00 | 83.35 | 92.10 | a | 96.27 | a | 94.74 | 88.87 | 80.39 | 64.90 | 61.61 | 74.56 | ||||||||
1974 | 55.23 | 60.39 | 66.03 | 73.80 | 83.57 | a | 97.23 | 94.35 | 92.58 | 87.68 | b | 73.90 | k | 65.67 | 54.39 | 75.54 | a | |||||||||
1975 | 58.08 | f | 58.46 | 60.45 | 64.13 | 80.35 | 90.47 | 94.48 | 95.68 | 89.76 | i | 77.71 | 67.00 | 61.60 | k | 76.53 | c | |||||||||
1976 | 61.61 | 60.92 | e | 63.46 | g | 68.93 | 80.00 | 89.83 | 90.55 | 92.52 | 83.40 | 71.37 | d | 66.93 | 58.87 | 74.99 | a | |||||||||
1977 | 55.65 | 65.14 | 62.06 | 75.14 | a | 74.48 | 92.20 | 92.16 | 92.06 | 86.77 | 76.90 | 67.37 | 60.42 | 75.03 | ||||||||||||
1978 | 55.32 | 56.74 | a | 65.26 | 69.40 | 81.72 | b | 94.50 | 97.60 | a | 91.55 | 87.27 | 81.84 | 61.83 | 53.52 | 74.71 | ||||||||||
1979 | 49.16 | 58.71 | 60.94 | 73.17 | 79.48 | 92.28 | a | 96.32 | 91.71 | 92.13 | 81.19 | 62.63 | 63.58 | 75.11 | ||||||||||||
1980 | 55.26 | 60.66 | 59.71 | 72.17 | a | 74.39 | 92.57 | 98.52 | 93.07 | a | 89.43 | 78.35 | 70.17 | 67.26 | 75.96 | |||||||||||
1981 | 62.29 | 64.75 | 62.06 | 76.27 | 80.39 | 96.07 | 95.84 | 95.35 | 88.90 | a | 73.19 | 68.93 | 62.55 | 77.22 | ||||||||||||
1982 | 55.10 | a | 59.35 | b | 60.03 | a | 71.20 | 79.90 | 88.70 | 94.39 | 92.52 | 85.79 | a | 75.81 | 60.97 | 54.65 | 73.20 | |||||||||
1983 | 59.29 | 57.46 | 60.23 | 64.47 | 81.23 | 88.53 | 95.39 | 91.60 | a | 88.37 | 75.32 | 63.37 | 57.19 | 73.54 | ||||||||||||
1984 | 60.32 | 62.31 | 69.07 | d | 71.60 | 89.77 | a | 89.80 | 93.52 | 90.16 | 88.10 | a | 71.19 | 64.33 | 53.35 | 75.29 | ||||||||||
1985 | 53.65 | 57.36 | 62.94 | 77.28 | a | 83.10 | 96.07 | 97.66 | b | 95.94 | 83.07 | b | 76.13 | 61.17 | 60.81 | 75.43 | ||||||||||
1986 | 66.42 | 61.04 | 69.03 | 73.80 | 83.97 | 94.03 | 92.20 | a | 93.42 | 81.33 | 74.10 | 66.30 | 58.48 | 76.18 | ||||||||||||
1987 | 56.55 | 57.82 | 62.61 | 78.45 | a | 81.10 | 94.97 | 94.84 | 92.58 | 88.17 | 80.77 | 62.97 | 53.90 | 75.39 | ||||||||||||
1988 | 56.58 | 64.31 | 67.71 | 72.50 | 82.76 | b | 94.21 | a | 96.63 | a | 92.23 | 86.57 | 83.13 | 65.13 | 57.61 | 76.61 | ||||||||||
1989 | 56.48 | 62.00 | a | 72.53 | a | 82.90 | a | 84.94 | 93.70 | 98.39 | 92.65 | 90.66 | a | 77.87 | 69.27 | 62.94 | 78.69 | |||||||||
1990 | 56.26 | 58.43 | 66.80 | a | 74.97 | 80.90 | a | 96.60 | 93.23 | a | 91.77 | 88.28 | a | 80.85 | d | 68.73 | 55.65 | 76.04 | ||||||||
1991 | 57.65 | 68.21 | 58.23 | a | 72.10 | 79.32 | 87.93 | a | 96.48 | d | 95.57 | c | 87.93 | b | 81.37 | a | 65.47 | 54.61 | 75.41 | |||||||
1992 | 57.53 | a | 61.32 | a | 62.07 | a | 76.90 | 81.82 | c | 89.03 | 93.26 | 91.42 | 89.37 | 80.87 | 63.23 | 54.93 | a | 75.15 | ||||||||
1993 | 55.32 | 55.79 | 67.39 | 75.40 | 84.10 | 92.03 | a | 94.06 | 92.48 | 90.36 | b | 77.23 | a | 62.93 | a | 60.20 | a | 75.61 | ||||||||
1994 | 62.58 | 59.33 | a | 68.23 | 74.37 | 80.58 | 97.07 | c | 96.94 | 97.48 | d | 90.50 | b | 77.36 | c | 60.37 | 59.13 | 76.99 | ||||||||
1995 | 54.97 | 65.70 | a | 65.06 | 69.83 | 76.65 | 90.55 | a | 98.70 | a | 97.27 | a | 90.50 | d | 82.41 | b | 73.48 | a | 62.00 | 77.26 | ||||||
1996 | 61.48 | 65.66 | 69.13 | 78.52 | a | 85.61 | 96.50 | 99.21 | b | 96.89 | c | 84.76 | a | 77.58 | e | 69.28 | a | 61.61 | 78.85 | |||||||
1997 | 56.74 | 61.14 | 73.52 | 71.03 | 88.19 | 90.03 | 97.77 | 94.93 | a | 90.43 | b | 76.60 | a | 68.03 | a | 55.31 | b | 76.98 | ||||||||
1998 | 59.39 | 53.37 | a | 62.13 | 67.33 | 77.35 | 87.93 | 96.94 | 97.03 | 88.24 | a | 77.97 | b | 68.24 | a | 59.90 | a | 74.65 | ||||||||
1999 | 63.61 | 66.18 | 68.55 | 67.37 | 82.00 | 91.73 | 91.48 | 94.17 | a | 88.24 | a | 84.30 | a | 75.59 | a | 60.77 | 77.83 | |||||||||
2000 | 63.77 | 64.64 | a | 65.82 | c | 78.83 | a | 88.26 | 93.62 | a | 97.19 | ----- | z | 91.23 | 72.73 | a | 58.67 | c | 62.65 | 76.13 | a | |||||
2001 | 54.56 | d | 56.75 | d | 65.87 | a | 71.61 | b | 89.45 | b | 95.34 | a | 95.16 | 93.62 | b | 93.07 | 82.24 | b | 68.73 | 57.04 | c | 76.95 | ||||
2002 | 60.50 | a | 65.39 | 68.35 | 76.67 | 84.90 | 96.00 | 97.63 | a | 96.48 | 88.67 | c | 74.87 | 68.41 | a | 56.63 | a | 77.88 | ||||||||
2003 | 67.97 | a | 58.08 | b | 64.93 | b | 70.34 | a | 83.92 | e | 93.93 | a | 99.90 | a | 95.56 | d | 91.12 | d | 85.19 | d | 63.24 | e | 58.93 | a | 77.76 | |
2004 | 58.62 | b | 56.21 | a | 74.12 | e | 72.92 | d | 85.04 | d | 92.67 | c | 96.26 | d | 92.43 | c | 87.79 | b | 74.07 | b | 59.30 | c | 58.13 | 75.63 | ||
2005 | 57.61 | 56.67 | a | 63.13 | a | 73.63 | c | 84.37 | a | 91.30 | c | 99.27 | e | 91.91 | i | 89.20 | 78.27 | a | 70.48 | a | 63.17 | a | 75.19 | a | ||
2006 | 62.23 | a | 65.93 | 60.72 | b | 74.48 | a | 87.13 | 96.57 | 96.23 | 90.94 | 85.20 | 76.29 | 69.67 | 58.23 | 76.97 | ||||||||||
2007 | 54.47 | a | 61.52 | a | 70.35 | 74.76 | a | 84.84 | 95.10 | 96.45 | 94.93 | b | 88.23 | 79.26 | 72.33 | 53.29 | 77.13 | |||||||||
2008 | 53.00 | 58.93 | 67.55 | 75.10 | 79.63 | a | 94.97 | 94.32 | 93.32 | 89.43 | 81.03 | b | 70.41 | a | 56.42 | 76.18 | ||||||||||
2009 | 61.63 | a | 60.75 | 68.37 | a | 72.53 | 86.58 | 87.71 | b | 97.68 | 96.48 | b | 91.18 | b | 76.03 | a | 71.34 | a | 53.23 | 76.96 | ||||||
2010 | 58.26 | 57.32 | 63.10 | a | 70.79 | b | 79.58 | 91.80 | 95.68 | 93.07 | a | 93.10 | 76.68 | 63.28 | a | 62.34 | b | 75.42 | ||||||||
2011 | 59.68 | 56.64 | 68.87 | 74.93 | 80.26 | 92.83 | 96.52 | 99.26 | d | 92.08 | e | 81.04 | c | 64.14 | b | 54.61 | 76.74 | |||||||||
2012 | 62.00 | 61.03 | 67.77 | 77.63 | 86.40 | a | 95.27 | 94.13 | 94.10 | 88.80 | 80.61 | c | 71.76 | a | 56.00 | 77.96 | ||||||||||
2013 | 56.65 | 58.00 | 70.61 | 76.40 | 83.63 | a | 96.57 | b | 94.00 | 92.47 | a | 85.23 | 74.74 | 66.00 | 57.29 | 75.97 | ||||||||||
2014 | 64.73 | a | ----- | z | 68.77 | 75.53 | 83.26 | 93.57 | 94.84 | 89.65 | 86.70 | 81.16 | 67.60 | 56.94 | 78.43 | a | ||||||||||
2015 | 61.10 | 67.14 | 71.19 | 74.37 | 77.32 | 95.23 | 93.45 | 96.55 | 90.33 | 77.97 | 62.20 | 55.48 | 76.86 | |||||||||||||
2016 | 56.55 | 69.48 | 71.74 | 74.27 | 80.06 | 96.73 | 97.58 | 90.32 | 86.13 | 81.65 | 67.83 | 57.48 | 77.49 | |||||||||||||
2017 | 52.16 | 60.68 | 71.39 | 76.23 | 83.10 | 97.57 | 94.52 | 93.84 | 87.00 | 82.74 | 73.23 | 65.00 | 78.12 | |||||||||||||
2018 | 65.16 | 60.82 | 67.35 | 79.10 | 83.80 | a | 94.60 | 95.52 | 92.58 | 92.83 | 71.10 | 64.48 | a | 58.00 | 77.11 | |||||||||||
2019 | 58.03 | 50.86 | 64.39 | 75.70 | 75.10 | 91.70 | 97.57 | a | 97.29 | 86.87 | 76.48 | 67.87 | 56.17 | a | 74.83 | |||||||||||
2020 | 59.39 | 60.90 | 61.26 | 73.34 | a | 87.07 | a | 92.90 | 99.26 | 100.27 | a | 93.80 | 85.03 | ----- | z | 60.35 | 79.42 | a | ||||||||
2021 | 58.41 | b | 62.50 | 64.50 | a | 79.53 | 85.50 | a | 99.83 | 95.32 | 94.45 | 91.30 | 76.26 | 74.80 | 59.35 | 78.48 | ||||||||||
2022 | 61.77 | 63.00 | 70.13 | 80.45 | a | 87.00 | 96.87 | 98.81 | 94.67 | a | 91.33 | 78.27 | a | 62.45 | a | 57.19 | 78.49 | |||||||||
2023 | 53.00 | 57.89 | 59.71 | 76.73 | 83.19 | 89.90 | 104.77 | 98.81 | 90.77 | 82.73 | a | 69.57 | 63.81 | 77.57 | ||||||||||||
2024 | 56.19 | 60.21 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.20 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.35 | 59.97 | 65.26 | 73.43 | 82.04 | 92.16 | 95.85 | 93.27 | 88.44 | 77.98 | 66.40 | 58.27 | 75.80 | |||||||||||||
S.D. | 4.54 | 4.47 | 4.62 | 3.89 | 3.54 | 3.17 | 2.29 | 2.57 | 2.81 | 3.79 | 4.16 | 3.87 | 1.54 | |||||||||||||
SKEW | -0.96 | -0.07 | 0.02 | -0.26 | -0.24 | -0.07 | 0.28 | 0.30 | -0.41 | -0.07 | -0.01 | 0.07 | -0.22 | |||||||||||||
MAX | 67.97 | 69.48 | 76.74 | 82.90 | 89.77 | 99.83 | 104.77 | 100.27 | 94.39 | 86.19 | 75.59 | 67.26 | 78.85 | |||||||||||||
MIN | 38.61 | 47.61 | 53.93 | 62.79 | 73.74 | 84.00 | 90.23 | 87.60 | 81.33 | 69.42 | 55.64 | 46.90 | 71.80 | |||||||||||||
YRS | 90 | 91 | 88 | 90 | 92 | 91 | 92 | 90 | 91 | 89 | 91 | 91 | 79 |