YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | 48.25 | q | 61.92 | e | 65.03 | 68.00 | 75.58 | 80.74 | a | ----- | z | 87.58 | a | 84.73 | 73.21 | c | 66.02 | ----- | z | 73.65 | c | |||||
1917 | ----- | z | ----- | z | ----- | z | 64.89 | h | 65.60 | u | 88.83 | l | 89.66 | b | 86.45 | 82.35 | 76.34 | 64.70 | 59.50 | 76.50 | f | |||||
1918 | 51.90 | 56.54 | 61.27 | 67.47 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.29 | h | ||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 58.04 | b | 65.24 | 65.00 | q | 81.06 | 87.33 | 93.18 | 89.44 | 86.32 | 74.26 | ----- | z | 54.71 | 76.62 | c | ||||||||
1929 | 52.50 | 55.48 | 61.79 | 67.47 | ----- | z | 87.80 | 92.22 | b | 89.13 | 82.88 | 75.26 | 61.37 | 59.71 | 71.42 | a | ||||||||||
1930 | 50.83 | b | 62.06 | b | 61.17 | b | 72.31 | a | 71.79 | 87.27 | 90.24 | 88.45 | 82.15 | 71.68 | a | 59.21 | b | 53.55 | 70.89 | |||||||
1931 | 53.77 | 55.70 | 63.13 | 70.61 | c | 81.21 | 87.70 | 94.29 | 88.19 | 84.55 | 73.68 | 56.74 | g | 50.15 | 73.00 | a | ||||||||||
1932 | 47.50 | 56.04 | c | 61.32 | 70.54 | b | 79.24 | 85.10 | 91.06 | 90.56 | 85.57 | 71.98 | a | 65.30 | 49.76 | b | 71.16 | |||||||||
1933 | 49.10 | b | 50.56 | b | 61.08 | 66.69 | c | 72.73 | 87.90 | 94.26 | 91.21 | 85.93 | a | 76.19 | 65.47 | a | 55.43 | d | 71.38 | |||||||
1934 | 54.45 | ----- | z | 69.13 | a | 74.47 | 83.08 | 82.20 | b | 93.89 | 88.74 | b | 84.76 | a | 76.08 | 62.40 | a | 54.92 | 74.92 | a | ||||||
1935 | 53.97 | 56.34 | 56.84 | c | 66.65 | 73.58 | 90.97 | 93.19 | 89.79 | 83.75 | 74.08 | 57.60 | ----- | z | 72.43 | a | ||||||||||
1936 | ----- | z | ----- | z | ----- | z | 75.91 | a | 85.16 | 93.02 | 94.58 | 92.15 | ----- | z | ----- | z | ----- | z | ----- | z | 88.16 | g | ||||
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 | 55.54 | c | 62.73 | 70.87 | c | 72.58 | a | 87.32 | 90.85 | 85.13 | 81.05 | a | 72.63 | 61.81 | a | 53.79 | 72.21 | a | ||||||
1960 | 49.02 | 51.48 | a | 64.55 | 67.93 | 74.83 | a | 88.37 | 89.89 | 87.90 | 85.07 | 70.90 | a | 62.50 | 53.73 | 70.51 | ||||||||||
1961 | 57.50 | 58.09 | 59.53 | a | 67.78 | a | 74.15 | 87.41 | a | 89.63 | 87.06 | 79.28 | 71.02 | 58.23 | 53.32 | 70.25 | ||||||||||
1962 | 52.02 | 54.36 | 54.61 | 71.63 | 72.50 | a | 82.37 | 87.47 | 89.98 | 83.05 | 73.02 | 64.72 | 57.06 | 70.23 | ||||||||||||
1963 | 50.38 | a | 60.87 | a | 59.05 | 63.76 | a | 77.69 | 79.63 | 90.27 | 85.19 | 84.75 | 75.71 | 62.07 | 55.60 | 70.41 | ||||||||||
1964 | 50.76 | 51.22 | 56.42 | 64.70 | 73.08 | 81.35 | 90.43 | a | 84.63 | 81.58 | 76.82 | 58.18 | 53.32 | 68.54 | ||||||||||||
1965 | 55.13 | 54.07 | 56.50 | 63.70 | 70.89 | 77.08 | 89.42 | 87.87 | 78.63 | 76.23 | 63.92 | 54.18 | 68.97 | |||||||||||||
1966 | 50.18 | a | 50.65 | a | 62.84 | 69.97 | 78.42 | 85.87 | 91.37 | 88.40 | 81.77 | 72.30 | a | 63.87 | 53.90 | a | 70.79 | |||||||||
1967 | 52.74 | 57.07 | 59.95 | 59.33 | 73.90 | 79.32 | 88.84 | 88.34 | 82.25 | 74.50 | 64.27 | 48.24 | 69.06 | |||||||||||||
1968 | 53.37 | 59.71 | 59.40 | 63.98 | 74.19 | 85.58 | 87.84 | 82.98 | ----- | z | 73.18 | a | ----- | z | 50.27 | 69.05 | b | |||||||||
1969 | 54.39 | 52.57 | a | 54.74 | 66.28 | a | 77.55 | 82.02 | 89.92 | 92.40 | 84.60 | 69.65 | 60.05 | 54.24 | 69.87 | |||||||||||
1970 | 51.39 | 58.75 | 57.44 | 60.67 | 76.05 | 85.74 | a | 92.33 | a | 89.69 | 79.05 | 68.05 | 61.07 | a | 52.85 | 69.42 | ||||||||||
1971 | 53.72 | a | 54.73 | 61.50 | 64.33 | 70.60 | 83.55 | 91.81 | 85.32 | 82.93 | 66.00 | a | 59.52 | 49.76 | 68.65 | |||||||||||
1972 | 52.24 | 58.43 | 67.74 | 67.80 | 76.30 | a | 85.23 | 92.00 | 87.00 | 82.30 | 68.48 | 54.87 | 51.02 | b | 70.28 | |||||||||||
1973 | 49.52 | 53.66 | 51.03 | a | 61.59 | a | 77.08 | a | 85.48 | 90.06 | 89.71 | 82.57 | 73.65 | 59.22 | 54.68 | 69.02 | ||||||||||
1974 | 51.19 | 54.07 | 60.40 | 65.45 | 75.13 | 89.45 | 87.91 | b | 85.37 | 81.63 | 72.39 | 60.40 | 49.08 | 69.37 | ||||||||||||
1975 | 51.47 | 52.88 | 55.05 | 58.50 | 74.21 | 81.47 | 88.40 | 87.92 | 83.52 | 70.92 | 58.75 | 54.42 | 68.12 | |||||||||||||
1976 | 53.24 | 57.74 | 56.92 | 60.92 | 73.92 | 84.28 | 89.15 | a | 86.60 | ----- | z | 69.27 | 62.62 | ----- | z | 69.47 | b | |||||||||
1977 | ----- | z | 56.88 | 54.37 | 65.67 | 68.29 | 86.83 | 90.35 | 89.02 | 84.45 | 74.73 | 63.75 | 57.24 | 71.96 | a | |||||||||||
1978 | 52.40 | 53.89 | 61.47 | 63.57 | 73.39 | 86.28 | 91.06 | 86.55 | 80.57 | 74.81 | 57.37 | 49.03 | 69.20 | |||||||||||||
1979 | 46.34 | 52.88 | 56.31 | 65.05 | 71.52 | 83.23 | 87.47 | 85.02 | ----- | z | ----- | z | 57.48 | 55.74 | 66.10 | b | ||||||||||
1980 | 53.05 | 57.86 | 56.44 | 65.70 | 69.45 | 83.95 | 90.67 | a | 85.18 | a | 80.40 | 70.66 | 62.28 | 59.68 | 69.61 | |||||||||||
1981 | 56.73 | 57.75 | 57.97 | a | 68.87 | 72.84 | 86.20 | 89.35 | 86.53 | 83.83 | 69.30 | f | 63.72 | g | 57.28 | a | 71.74 | b | ||||||||
1982 | 51.23 | c | 59.20 | c | 58.06 | e | 63.77 | 70.31 | b | 80.28 | a | 87.68 | 87.98 | b | 81.16 | a | 70.61 | 58.28 | a | 51.45 | 68.33 | |||||
1983 | 53.61 | 54.37 | a | 56.70 | a | 59.95 | 74.05 | a | 80.78 | 87.65 | 86.00 | a | 83.71 | b | 71.35 | 58.57 | 53.40 | 68.35 | ||||||||
1984 | 54.39 | 56.21 | a | 62.73 | 65.15 | c | 79.69 | 81.08 | 86.73 | a | 85.43 | a | 82.28 | a | 66.15 | 58.78 | a | 52.16 | c | 69.23 | ||||||
1985 | 50.70 | a | 53.50 | a | 58.37 | d | 69.65 | 75.33 | b | 85.08 | 89.37 | 88.16 | 76.23 | 70.89 | 57.45 | a | 55.05 | 69.15 | ||||||||
1986 | 59.79 | 56.93 | 64.15 | 68.05 | 75.95 | 85.02 | 85.60 | 88.05 | 77.05 | 69.45 | 61.78 | 54.39 | 70.52 | |||||||||||||
1987 | 51.97 | 54.98 | 57.85 | 71.13 | 74.69 | 84.80 | 85.74 | 86.32 | 81.35 | 75.90 | 59.28 | a | 49.79 | 69.48 | ||||||||||||
1988 | 52.27 | 58.52 | 60.55 | 66.23 | 74.52 | a | 85.92 | 89.63 | 86.13 | 80.28 | 77.27 | 59.98 | 52.39 | 70.31 | ||||||||||||
1989 | 51.87 | 57.32 | 64.63 | 73.13 | 76.19 | 83.98 | 90.44 | 85.60 | 82.05 | 71.58 | 63.48 | a | 54.69 | 71.25 | ||||||||||||
1990 | 52.50 | 52.73 | 60.65 | a | 68.07 | 71.66 | 85.77 | 86.90 | a | 84.71 | b | 82.17 | 73.71 | 62.63 | 50.60 | a | 69.34 | |||||||||
1991 | 53.32 | 62.00 | 54.35 | a | 64.63 | 71.16 | 79.93 | 87.72 | a | 87.76 | 81.47 | 74.55 | 59.53 | 54.00 | 69.20 | |||||||||||
1992 | 52.48 | 57.64 | 58.65 | 70.40 | 75.37 | 80.78 | 86.20 | a | 85.84 | 82.24 | a | 73.42 | 57.79 | a | 51.31 | 69.34 | ||||||||||
1993 | 53.47 | a | 53.77 | 60.92 | 67.85 | 76.03 | 82.92 | 85.90 | 85.87 | 81.98 | 71.60 | 58.52 | a | 53.89 | 69.39 | |||||||||||
1994 | 55.06 | 54.32 | 62.23 | 67.33 | a | 72.89 | 87.03 | 88.08 | a | 88.97 | 82.97 | 69.12 | a | 55.92 | 54.90 | 69.90 | ||||||||||
1995 | 52.26 | 60.98 | 59.98 | a | 63.05 | 69.56 | 80.22 | a | 89.00 | a | 89.45 | 83.05 | 74.34 | 66.13 | 56.35 | 70.37 | ||||||||||
1996 | 55.44 | 60.33 | 61.75 | a | 68.02 | f | 75.98 | b | 85.77 | ----- | z | ----- | z | ----- | z | ----- | z | 63.27 | ----- | z | 67.09 | f | ||||
1997 | ----- | z | ----- | z | ----- | z | ----- | z | 79.39 | 79.32 | 86.90 | e | 87.18 | 84.38 | 70.32 | 60.72 | a | 50.94 | 74.89 | d | ||||||
1998 | 53.73 | 50.61 | 57.32 | 60.39 | b | 69.64 | b | 77.33 | c | 88.95 | c | 89.50 | p | 81.37 | 70.08 | a | 61.15 | 53.23 | a | 65.80 | a | |||||
1999 | 55.84 | 58.32 | 61.39 | d | ----- | z | 75.97 | m | 83.59 | c | 86.54 | h | 86.12 | r | 82.76 | a | 76.28 | b | 67.00 | 53.59 | b | 67.35 | d | |||
2000 | 56.18 | 57.62 | 60.84 | b | 70.43 | 79.38 | b | 85.06 | e | 88.47 | 87.28 | a | 83.84 | k | 69.69 | b | 54.76 | c | 55.80 | a | 69.59 | a | ||||
2001 | 51.80 | d | 53.21 | 61.25 | g | 67.11 | b | 81.39 | c | 87.47 | a | 88.73 | e | 88.39 | 86.79 | b | 75.92 | 64.31 | a | 51.93 | a | 72.46 | a | |||
2002 | 54.40 | b | 58.64 | 61.41 | b | 70.54 | b | 75.97 | a | 87.78 | a | 91.18 | a | 89.40 | a | 84.08 | 71.12 | b | 64.38 | e | 52.79 | 71.81 | ||||
2003 | 61.34 | b | 55.17 | b | 59.95 | a | 63.48 | 76.23 | a | 84.57 | a | 92.91 | c | 89.71 | c | 85.23 | b | 78.23 | a | 58.59 | a | 54.55 | 71.66 | |||
2004 | 54.79 | 52.14 | 67.26 | 66.64 | b | 76.82 | 84.43 | a | 88.98 | c | 86.93 | c | 82.37 | 70.18 | c | 55.98 | c | 53.68 | 70.02 | |||||||
2005 | 54.84 | b | 55.43 | 58.94 | e | 66.74 | a | 76.36 | c | 82.91 | c | 90.72 | a | 86.14 | i | 82.66 | b | 71.97 | b | 63.48 | 55.43 | d | 69.04 | a | ||
2006 | 55.11 | 58.65 | b | 58.00 | c | 67.27 | b | 78.57 | d | 87.45 | 92.45 | c | 87.95 | c | 80.29 | b | 71.10 | a | 63.87 | 52.03 | 71.06 | |||||
2007 | 51.00 | a | 56.34 | 64.36 | b | 67.20 | b | 79.48 | h | 86.50 | a | 90.86 | b | 91.00 | a | 83.53 | a | 73.19 | d | 67.52 | 50.48 | 71.09 | a | |||
2008 | 50.24 | b | 54.30 | b | 61.03 | 67.16 | a | 73.02 | f | 87.12 | b | 89.88 | b | 89.46 | d | 84.50 | ----- | z | 65.00 | 53.24 | b | 70.19 | b | |||
2009 | 57.33 | a | 56.94 | a | 62.70 | a | 65.79 | a | 80.10 | 81.62 | 92.43 | d | 90.26 | b | 84.91 | a | 70.05 | 65.03 | 50.53 | 71.47 | ||||||
2010 | 54.61 | 54.22 | a | 57.37 | 64.65 | 72.55 | 83.52 | 90.06 | 87.77 | 85.45 | j | 72.48 | 59.10 | 57.39 | 68.52 | a | ||||||||||
2011 | 53.52 | 51.04 | 62.63 | 67.88 | 72.06 | 83.83 | 90.03 | 93.32 | 86.00 | 75.52 | 59.22 | 50.77 | 70.49 | |||||||||||||
2012 | 56.55 | 55.64 | 61.84 | 70.45 | 78.50 | 86.62 | 89.05 | 89.94 | 84.40 | 75.08 | 67.25 | 51.77 | 72.26 | |||||||||||||
2013 | 51.35 | 52.18 | 63.47 | 68.62 | 74.73 | 86.32 | 86.31 | g | 89.12 | b | 80.80 | e | 69.23 | 62.50 | 53.35 | 68.33 | a | |||||||||
2014 | 57.77 | 60.41 | 64.03 | 69.28 | 75.77 | 85.02 | 89.68 | 85.50 | b | 83.40 | 75.82 | 62.92 | 54.68 | 72.02 | ||||||||||||
2015 | 56.56 | 62.48 | 67.66 | 68.12 | 72.48 | 88.20 | 87.58 | 90.81 | 85.12 | 74.37 | 58.40 | 52.55 | 72.03 | |||||||||||||
2016 | 53.21 | 62.54 | e | 66.34 | 70.32 | 74.55 | 90.55 | 93.02 | 87.21 | 82.15 | 77.16 | 64.83 | 56.94 | 73.23 | ||||||||||||
2017 | 53.48 | 59.30 | 66.69 | 71.12 | 77.85 | 90.89 | b | 92.06 | 90.35 | 83.20 | 76.42 | k | 69.07 | 59.29 | 73.94 | a | ||||||||||
2018 | 60.45 | 57.71 | 63.87 | 74.30 | 79.42 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.15 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.31 | 56.23 | 60.61 | 67.07 | 75.26 | 84.75 | 89.90 | 87.93 | 82.73 | 72.74 | 61.47 | 53.62 | 70.14 | |||||||||||||
S.D. | 2.81 | 3.15 | 3.70 | 3.68 | 3.48 | 3.28 | 2.19 | 2.11 | 2.12 | 2.79 | 3.32 | 2.68 | 1.19 | |||||||||||||
SKEW | 0.44 | 0.13 | -0.00 | -0.10 | 0.41 | -0.13 | 0.14 | 0.18 | -0.65 | -0.21 | 0.06 | 0.28 | 0.45 | |||||||||||||
MAX | 61.34 | 62.54 | 69.13 | 75.91 | 85.16 | 93.02 | 94.58 | 93.32 | 86.79 | 78.23 | 69.07 | 59.71 | 73.23 | |||||||||||||
MIN | 46.34 | 50.56 | 51.03 | 58.50 | 68.29 | 77.08 | 85.60 | 82.98 | 76.23 | 66.00 | 54.76 | 48.24 | 68.12 | |||||||||||||
YRS | 65 | 68 | 68 | 67 | 66 | 69 | 66 | 66 | 63 | 64 | 65 | 65 | 44 |