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 | ----- | 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 | 60.48 | b | 60.48 | k |
1947 | ----- | z | 56.08 | b | 63.86 | b | 76.15 | c | 81.58 | 93.67 | 94.61 | m | 92.48 | 90.03 | 84.38 | g | 57.96 | b | 56.00 | 74.20 | c | |||||
1948 | 47.32 | 53.14 | 62.63 | a | 81.70 | 85.68 | 95.13 | 94.66 | b | 93.97 | a | 87.92 | e | 74.39 | 63.17 | 60.42 | 75.01 | |||||||||
1949 | 40.84 | 57.00 | g | 68.42 | 68.37 | 82.06 | 89.37 | 94.14 | c | 90.90 | 81.87 | 73.65 | 72.43 | 56.42 | 74.41 | a | ||||||||||
1950 | 62.27 | e | 66.80 | c | 66.39 | h | 76.47 | 84.55 | 91.00 | 86.93 | b | 90.81 | 82.53 | 81.77 | 69.81 | d | 63.13 | a | 77.82 | a | ||||||
1951 | 56.15 | d | 58.92 | b | 63.68 | c | 73.90 | 81.65 | 92.13 | 97.00 | 93.87 | a | 87.93 | 79.39 | 60.72 | a | 57.96 | g | 76.85 | a | ||||||
1952 | 65.00 | t | ----- | z | ----- | z | 72.17 | f | 82.61 | c | 95.52 | i | 90.83 | b | 96.97 | 84.93 | 76.87 | 53.77 | h | 55.60 | a | 81.30 | f | |||
1953 | 62.96 | c | 57.50 | 70.71 | 75.20 | 82.74 | 98.27 | 95.27 | a | 93.00 | a | 88.00 | g | 75.22 | h | 63.00 | h | 51.48 | 76.35 | c | ||||||
1954 | 59.58 | 66.07 | a | 64.93 | a | 80.18 | b | 78.23 | i | 90.89 | b | 95.87 | 92.32 | 89.33 | 76.45 | 67.73 | 59.19 | 76.60 | a | |||||||
1955 | 51.57 | a | 56.25 | 67.13 | 78.14 | a | 82.10 | 91.83 | a | 93.47 | l | 92.50 | a | 88.70 | g | 75.62 | b | 63.48 | a | 59.03 | a | 71.76 | b | |||
1956 | 57.42 | 51.43 | a | 69.83 | a | 75.34 | a | 87.52 | b | 94.10 | a | 94.65 | 93.07 | a | 90.83 | a | 79.23 | 62.33 | 59.03 | 76.23 | ||||||
1957 | 54.35 | 63.48 | a | 65.79 | b | 71.27 | 78.04 | c | 88.13 | 94.94 | 91.45 | 84.60 | 69.65 | 54.80 | 60.88 | f | 74.23 | a | ||||||||
1958 | 48.90 | 53.86 | 53.07 | b | 67.64 | h | 82.45 | 93.17 | 95.33 | a | 93.65 | 83.70 | 67.58 | 63.93 | 56.03 | 71.97 | a | |||||||||
1959 | 55.77 | a | 54.46 | 66.04 | c | 71.80 | 83.13 | a | 91.30 | 90.20 | a | 93.00 | 91.27 | d | 74.26 | d | 59.97 | a | 55.13 | 73.86 | ||||||
1960 | 49.61 | 51.97 | 60.19 | 79.19 | d | 86.13 | 94.33 | 88.76 | b | 91.10 | 88.13 | 76.81 | 66.03 | a | 46.10 | 73.20 | ||||||||||
1961 | 50.94 | 56.11 | 63.32 | 75.00 | 85.77 | 92.15 | c | 89.17 | a | 91.45 | 84.79 | a | 79.45 | 54.86 | i | 53.52 | j | 76.82 | b | |||||||
1962 | 52.26 | 66.46 | 64.00 | b | 76.33 | 91.19 | 89.13 | 91.48 | 94.33 | d | 84.17 | 76.35 | 64.57 | 56.08 | f | 77.30 | a | |||||||||
1963 | 56.33 | p | 61.15 | a | 66.10 | j | 78.70 | 84.82 | c | 89.67 | c | 93.60 | a | 92.77 | 87.63 | 82.71 | c | 66.72 | e | 51.65 | 78.94 | b | ||||
1964 | 55.90 | a | 53.50 | o | ----- | z | ----- | z | ----- | z | 93.45 | j | 98.10 | 94.90 | 83.83 | 78.94 | 64.83 | 55.94 | 76.06 | e | ||||||
1965 | 59.90 | 55.25 | 59.32 | 78.37 | 83.19 | 90.37 | 93.71 | 89.37 | a | 85.63 | 78.90 | 72.27 | 58.61 | 75.41 | ||||||||||||
1966 | 49.87 | a | ----- | z | 70.32 | l | 72.73 | 79.40 | a | 88.14 | a | 94.94 | 86.58 | 82.47 | 73.45 | 69.57 | b | 56.61 | c | 75.38 | b | |||||
1967 | 58.87 | 60.64 | 74.61 | 79.76 | a | 84.35 | e | 89.80 | 88.90 | 88.71 | 80.79 | b | 77.42 | 64.25 | b | 51.19 | 74.94 | |||||||||
1968 | 53.45 | 54.79 | 62.42 | 71.27 | 81.13 | 90.53 | 86.61 | 87.48 | 84.70 | 79.32 | 60.67 | 57.61 | 72.50 | |||||||||||||
1969 | 60.65 | 58.79 | 56.48 | b | 76.72 | a | 81.56 | d | 90.15 | j | 95.64 | c | 93.67 | a | 82.30 | 68.39 | 62.86 | a | 59.00 | 72.37 | a | |||||
1970 | 53.21 | b | 61.14 | 60.19 | 74.73 | 85.42 | 89.27 | 94.48 | 94.52 | 84.17 | 70.90 | 64.47 | 63.03 | 74.63 | ||||||||||||
1971 | 59.74 | 59.62 | d | 68.16 | 74.67 | 83.90 | 92.27 | 92.94 | 82.45 | 81.07 | 73.65 | 66.07 | 55.68 | 74.18 | ||||||||||||
1972 | 58.97 | 62.55 | 74.45 | 80.83 | 80.58 | 89.40 | 88.26 | 86.23 | 82.83 | 73.48 | 54.73 | 55.23 | a | 73.96 | ||||||||||||
1973 | 46.45 | 52.18 | 63.83 | a | 68.48 | a | 81.35 | 89.93 | 90.23 | 91.45 | 83.27 | 79.81 | 69.07 | 59.74 | 72.98 | |||||||||||
1974 | 55.43 | a | 62.59 | a | 74.42 | 77.31 | a | 87.23 | 91.21 | a | 92.80 | a | 84.96 | d | 74.00 | 71.50 | c | 60.97 | 51.94 | 73.70 | ||||||
1975 | 54.48 | 55.79 | 64.97 | 72.43 | 81.23 | 91.90 | 84.39 | 88.74 | 79.00 | b | 77.94 | 66.67 | 58.48 | 73.00 | ||||||||||||
1976 | 56.23 | 68.28 | 68.74 | 76.63 | 80.87 | 90.53 | 84.32 | 91.58 | 81.33 | 71.77 | i | 56.40 | 56.60 | a | 73.77 | a | ||||||||||
1977 | 48.13 | 60.36 | 65.71 | 72.17 | 84.81 | e | 92.17 | 92.45 | 93.16 | 91.33 | 77.48 | 68.31 | a | 61.06 | 75.60 | |||||||||||
1978 | 47.42 | 49.48 | a | 67.94 | 81.60 | 83.94 | 90.87 | 95.77 | 93.10 | 79.12 | e | 75.61 | 67.55 | s | 55.42 | g | 76.48 | b | ||||||||
1979 | 44.74 | 56.39 | 63.32 | 76.00 | 79.77 | 86.23 | 92.29 | 87.52 | 86.03 | 82.88 | f | 58.63 | 56.70 | a | 71.60 | a | ||||||||||
1980 | 53.10 | a | 58.76 | 65.26 | 73.93 | ----- | z | ----- | z | 98.03 | 93.10 | 84.86 | a | 74.39 | 59.73 | 60.68 | 72.18 | b | ||||||||
1981 | ----- | z | 61.84 | i | 63.79 | g | 76.47 | 83.00 | a | 91.00 | 92.23 | 85.52 | 80.36 | p | 76.36 | f | 69.39 | b | 60.10 | 79.67 | e | |||||
1982 | 46.71 | c | 55.57 | 69.10 | 68.86 | a | 80.40 | a | 88.47 | 85.77 | 89.35 | 88.13 | 71.30 | a | 61.66 | a | 47.66 | b | 71.08 | |||||||
1983 | 48.55 | 59.36 | 66.94 | 69.43 | 81.45 | 88.23 | 94.67 | a | 96.16 | 88.55 | a | 73.57 | a | 63.00 | 48.66 | b | 73.21 | |||||||||
1984 | 50.53 | a | 59.41 | ----- | z | 69.63 | 85.16 | 85.57 | 88.32 | 88.19 | 82.83 | 70.35 | 66.47 | 55.06 | 72.87 | a | ||||||||||
1985 | ----- | z | 56.57 | 67.45 | 80.50 | 84.77 | 86.73 | 90.45 | 93.42 | 85.00 | 71.61 | 65.77 | 57.80 | a | 76.37 | a | ||||||||||
1986 | ----- | z | ----- | z | 73.26 | 82.27 | 81.94 | 81.00 | 90.61 | 89.03 | 83.77 | 71.90 | 61.13 | 50.41 | b | 76.53 | b | |||||||||
1987 | 50.60 | a | 58.29 | k | 56.25 | g | 80.37 | 80.45 | 86.10 | 89.16 | 87.37 | a | 80.93 | 77.32 | 64.37 | 51.71 | 74.84 | b | ||||||||
1988 | 48.26 | 58.32 | a | 70.77 | 74.53 | 83.42 | 90.07 | 88.87 | a | 88.61 | 86.30 | 80.29 | 75.37 | 59.77 | 75.38 | |||||||||||
1989 | 63.68 | 60.07 | a | 73.71 | 80.97 | 87.71 | 85.90 | a | 91.68 | 87.48 | 80.63 | 79.23 | 66.47 | 49.00 | b | 75.54 | ||||||||||
1990 | 57.41 | b | 60.74 | a | 63.23 | 72.37 | 80.90 | 99.10 | 86.74 | 86.65 | 83.86 | a | 74.74 | 67.45 | a | 54.19 | 73.95 | |||||||||
1991 | 47.19 | 62.07 | 69.45 | 77.20 | 87.81 | 92.13 | 87.20 | a | 87.35 | 73.20 | t | 77.77 | 56.30 | 52.26 | 72.43 | a | ||||||||||
1992 | 49.23 | 61.72 | 69.74 | 74.83 | a | 78.94 | 88.07 | 91.42 | 87.13 | 86.57 | 78.81 | 58.03 | 55.30 | a | 73.31 | |||||||||||
1993 | 50.77 | 55.79 | 67.16 | 75.40 | 83.16 | 92.07 | 94.74 | 91.81 | 85.33 | 74.00 | 59.20 | 58.74 | 74.01 | |||||||||||||
1994 | 55.74 | 61.61 | 67.84 | 75.20 | 81.81 | 97.50 | 97.35 | 94.48 | 87.10 | 76.42 | 64.67 | 59.71 | 76.62 | |||||||||||||
1995 | 55.35 | 66.93 | a | 67.39 | 75.93 | 81.61 | 90.17 | 95.26 | 91.68 | 80.97 | 77.97 | 67.30 | 57.23 | 75.65 | ||||||||||||
1996 | 56.48 | 64.45 | 64.87 | 78.07 | a | 92.45 | 92.47 | 92.52 | 87.42 | 82.10 | 75.74 | 65.03 | 60.45 | 76.00 | ||||||||||||
1997 | 50.61 | 51.93 | 71.61 | 68.40 | 80.71 | 89.53 | 93.90 | 91.29 | 87.57 | 76.58 | 61.03 | 51.10 | 72.86 | |||||||||||||
1998 | ----- | z | 57.43 | 64.48 | 74.67 | 92.16 | 98.57 | 98.77 | 90.13 | 91.67 | 77.26 | 61.06 | n | ----- | z | 82.79 | c | |||||||||
1999 | 61.35 | 67.61 | 64.52 | 74.80 | 80.90 | 88.43 | 92.29 | 94.74 | 83.17 | 77.42 | 72.03 | 56.35 | 76.14 | |||||||||||||
2000 | 60.03 | a | 67.90 | 70.06 | 79.20 | 89.61 | 87.33 | 94.23 | ----- | z | 90.13 | 73.55 | 54.90 | 47.68 | 74.06 | a | ||||||||||
2001 | 50.29 | 59.89 | 59.55 | 78.80 | 87.23 | 94.30 | 97.32 | 92.74 | 86.37 | 76.97 | a | 64.50 | b | 57.03 | b | 75.42 | ||||||||||
2002 | 56.84 | 56.56 | a | 66.82 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.70 | j | |
2003 | ----- | z | ----- | z | ----- | z | 76.83 | 86.16 | 88.23 | 93.77 | 93.48 | 85.90 | a | 79.53 | a | 67.96 | c | 60.52 | 81.38 | c | ||||||
2004 | 55.73 | a | 53.62 | 68.03 | 74.32 | e | 89.83 | a | 90.93 | 91.45 | 90.48 | 82.70 | 74.71 | c | 57.32 | b | 56.84 | 73.83 | ||||||||
2005 | 58.77 | e | 57.68 | 66.45 | b | 74.93 | b | 81.68 | c | 93.00 | c | 92.97 | b | 87.61 | 89.30 | 74.35 | 68.65 | g | 59.96 | d | 76.06 | a | ||||
2006 | 63.90 | 60.89 | 69.07 | c | 82.27 | 89.48 | 94.30 | 94.58 | e | 89.65 | h | 82.10 | a | 74.83 | h | 65.95 | k | 57.83 | m | 79.57 | d | |||||
2007 | 48.95 | i | 60.37 | i | 71.45 | i | 74.13 | o | 75.85 | k | 88.47 | m | 88.50 | o | 92.29 | g | 84.41 | m | 79.57 | h | 69.05 | k | 59.72 | m | ----- | z |
2008 | 53.23 | i | 64.95 | i | 67.70 | k | 77.27 | h | 85.47 | l | 95.65 | j | 89.33 | j | 89.50 | i | 79.45 | j | 74.05 | k | 70.18 | m | 55.57 | j | ----- | z |
2009 | 57.19 | j | 66.56 | j | 71.67 | g | 75.53 | 83.77 | 91.73 | 91.90 | 94.16 | 82.73 | 73.35 | 68.63 | 48.27 | a | 78.90 | c | ||||||||
2010 | 53.42 | 50.86 | 64.61 | 74.33 | 81.55 | 95.37 | 87.03 | 93.74 | 87.73 | 77.68 | 66.07 | 60.13 | 74.38 | |||||||||||||
2011 | 56.81 | 57.64 | 74.97 | 82.43 | 85.23 | 99.87 | 97.71 | 99.19 | 86.00 | 77.71 | 65.20 | 45.42 | 77.35 | |||||||||||||
2012 | 59.84 | 57.31 | 73.19 | 82.87 | 85.90 | 95.07 | 92.77 | 93.74 | 85.47 | 74.97 | 70.43 | 58.42 | 77.50 | |||||||||||||
2013 | 52.23 | 58.07 | 68.77 | 74.77 | 84.06 | 93.73 | 89.19 | 92.90 | 86.73 | 76.23 | 60.67 | 51.94 | 74.11 | |||||||||||||
2014 | 55.65 | 58.32 | 67.16 | 75.70 | 82.55 | 92.27 | 90.90 | 92.32 | 79.30 | 77.71 | 58.63 | 56.52 | 73.92 | |||||||||||||
2015 | 47.84 | 58.07 | 64.26 | 74.60 | 76.71 | 89.53 | 93.32 | 93.42 | 89.20 | 74.55 | 64.13 | 58.06 | 73.64 | |||||||||||||
2016 | 54.10 | 64.10 | 71.35 | 74.37 | 79.90 | 90.33 | 98.48 | 89.29 | 82.83 | 80.26 | 66.70 | 55.35 | 75.59 | |||||||||||||
2017 | 55.29 | 65.64 | 74.16 | 76.10 | 82.71 | 93.37 | 92.55 | 87.26 | 84.60 | 74.48 | 68.77 | 57.68 | 76.05 | |||||||||||||
2018 | 55.26 | 61.32 | 70.06 | 75.57 | 91.55 | 95.57 | 92.77 | 91.10 | 82.00 | 70.10 | 58.33 | 52.90 | 74.71 | |||||||||||||
2019 | 54.61 | 60.68 | 61.90 | 74.83 | 80.29 | 89.33 | 93.45 | 96.52 | 88.43 | 72.55 | 60.60 | 58.81 | 74.33 | |||||||||||||
2020 | 56.90 | 54.76 | 66.52 | 75.13 | 88.06 | 93.60 | 97.97 | 96.58 | 83.33 | 76.06 | 69.00 | 57.23 | 76.26 | |||||||||||||
2021 | 51.06 | 50.71 | 68.03 | 70.67 | 80.58 | 91.63 | 88.58 | 90.06 | 89.27 | 79.65 | 67.17 | 66.90 | 74.53 | |||||||||||||
2022 | 54.61 | 54.71 | 67.29 | 79.20 | 89.32 | 93.13 | 97.81 | 90.13 | 88.27 | 72.10 | 58.60 | 53.90 | 74.92 | |||||||||||||
2023 | 57.55 | 57.75 | 68.13 | 74.03 | 82.90 | 92.57 | 97.39 | 96.42 | 90.43 | 74.97 | 64.00 | 58.39 | 76.21 | |||||||||||||
2024 | 51.71 | 62.97 | 65.52 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.06 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.05 | 58.80 | 66.83 | 75.80 | 83.78 | 91.33 | 92.57 | 91.31 | 85.05 | 75.72 | 64.02 | 56.11 | 74.66 | |||||||||||||
S.D. | 4.92 | 4.57 | 4.41 | 3.59 | 3.46 | 3.35 | 3.58 | 3.26 | 3.49 | 3.23 | 4.68 | 4.32 | 1.36 | |||||||||||||
SKEW | -0.14 | 0.18 | -0.38 | -0.06 | 0.69 | 0.11 | -0.31 | -0.23 | -0.23 | -0.32 | -0.05 | -0.49 | -0.10 | |||||||||||||
MAX | 63.90 | 68.28 | 74.97 | 82.87 | 92.45 | 99.87 | 98.77 | 99.19 | 91.67 | 82.71 | 75.37 | 66.90 | 77.50 | |||||||||||||
MIN | 40.84 | 49.48 | 53.07 | 68.37 | 76.71 | 81.00 | 84.32 | 82.45 | 74.00 | 67.58 | 54.73 | 45.42 | 71.08 | |||||||||||||
YRS | 67 | 67 | 65 | 71 | 71 | 70 | 72 | 72 | 70 | 68 | 67 | 68 | 42 |