YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | 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 | 51.41 | m | 50.97 | 50.97 | k | |
1962 | 48.74 | 63.93 | 64.48 | 73.87 | 90.00 | 85.47 | 90.77 | 93.13 | 84.87 | 78.32 | 62.73 | 56.19 | 74.38 | |||||||||||||
1963 | 48.19 | 61.43 | 68.35 | 79.80 | 86.52 | 88.80 | 97.45 | 92.87 | 86.43 | 83.16 | 65.27 | 47.35 | 75.47 | |||||||||||||
1964 | 55.71 | 44.34 | 63.94 | 76.83 | 84.68 | 89.63 | 97.65 | 94.29 | 83.83 | 77.48 | 60.57 | 54.42 | 73.61 | |||||||||||||
1965 | 57.39 | 57.21 | 55.03 | 78.07 | 82.65 | 84.87 | 94.00 | 92.00 | 85.80 | 76.71 | 68.43 | 56.81 | 74.08 | |||||||||||||
1966 | 43.90 | 50.00 | 69.29 | 71.90 | 82.55 | 86.53 | 94.74 | 84.52 | 80.40 | 73.06 | 67.17 | 51.74 | 71.32 | |||||||||||||
1967 | 58.19 | 57.96 | 71.77 | 75.87 | 79.48 | 86.23 | 88.42 | 87.10 | 80.63 | 76.97 | 61.60 | 49.52 | 72.81 | |||||||||||||
1968 | 53.52 | 52.66 | 63.48 | 70.80 | 76.52 | 87.43 | 88.42 | 86.94 | 82.47 | 78.68 | 57.93 | 52.90 | 70.98 | |||||||||||||
1969 | 56.35 | 54.00 | 51.26 | 74.77 | 79.74 | 86.23 | 94.52 | 92.45 | 80.03 | 65.48 | 62.73 | 52.65 | 70.85 | |||||||||||||
1970 | 48.55 | 61.61 | 55.58 | 70.60 | 84.29 | 89.40 | 93.32 | 91.81 | 85.90 | 69.68 | 62.43 | 60.97 | 72.84 | |||||||||||||
1971 | 55.03 | 55.96 | 67.55 | 73.87 | 82.52 | 90.70 | 92.10 | 84.45 | 81.10 | 73.39 | 60.40 | 50.74 | 72.32 | |||||||||||||
1972 | 54.71 | 61.86 | 72.16 | 79.53 | 78.32 | 87.60 | 87.87 | 87.74 | 85.80 | 73.16 | ----- | z | ----- | z | 76.88 | b | ||||||||||
1973 | ----- | z | ----- | z | 59.94 | 65.10 | 77.65 | 90.07 | 90.97 | 92.23 | 81.70 | 77.55 | 66.47 | 55.23 | 75.69 | b | ||||||||||
1974 | 52.10 | 62.50 | 70.94 | 75.90 | 88.77 | 88.83 | 94.74 | 86.45 | 76.93 | 71.42 | 58.47 | 50.81 | 73.15 | |||||||||||||
1975 | 54.61 | 49.82 | 61.77 | 71.27 | 80.13 | 88.00 | 86.81 | 90.35 | 81.37 | 80.26 | 60.73 | 57.39 | 71.88 | |||||||||||||
1976 | 55.61 | 65.90 | 66.00 | 73.13 | 77.74 | 90.87 | 90.06 | 92.68 | 81.90 | 68.19 | 57.87 | 55.19 | 72.93 | |||||||||||||
1977 | 45.10 | 60.21 | 65.26 | 70.67 | 78.77 | 91.07 | 94.87 | 90.29 | 89.30 | 77.26 | 64.57 | 56.26 | 73.64 | |||||||||||||
1978 | 42.13 | 39.68 | 65.29 | 78.03 | 77.97 | 89.27 | 98.29 | 91.71 | 85.10 | 74.52 | 58.07 | 49.47 | a | 70.79 | ||||||||||||
1979 | 37.81 | 53.79 | 62.26 | 69.67 | 78.84 | 86.97 | 90.74 | 87.97 | a | 87.53 | 81.13 | 54.72 | a | 55.19 | 70.55 | |||||||||||
1980 | 48.48 | 55.03 | 62.61 | 71.03 | 78.00 | 94.23 | 100.45 | 95.13 | 87.27 | 75.32 | 58.57 | 58.29 | 73.70 | |||||||||||||
1981 | 54.29 | 61.46 | 62.23 | 77.97 | 80.43 | a | 93.93 | 93.00 | 87.84 | 83.73 | 71.23 | 62.33 | 54.45 | 73.57 | ||||||||||||
1982 | 54.35 | 51.54 | 64.32 | 72.83 | 79.39 | 83.73 | 91.74 | 91.97 | 88.12 | d | 73.64 | c | 58.89 | b | 47.89 | c | 71.54 | |||||||||
1983 | 46.47 | a | 48.68 | c | 58.13 | 66.85 | c | 78.52 | d | 85.67 | c | 94.72 | b | 97.21 | b | 88.48 | a | 73.96 | d | 63.75 | f | 37.00 | d | 70.52 | a | |
1984 | 48.58 | e | 60.68 | g | 61.61 | h | 67.19 | c | 83.71 | c | 88.97 | 92.23 | a | 91.10 | 87.13 | g | 69.60 | f | 60.46 | d | 52.32 | c | 73.07 | d | ||
1985 | 45.75 | g | 51.48 | e | 65.48 | h | 76.36 | e | 85.38 | g | 88.76 | e | 95.00 | b | 94.47 | a | 82.93 | 69.65 | 56.93 | 46.23 | 73.53 | c | ||||
1986 | 59.23 | 54.00 | 70.00 | 77.21 | a | 81.03 | a | 85.41 | a | 93.71 | 86.42 | 81.07 | a | 67.77 | 56.63 | 48.29 | 71.73 | |||||||||
1987 | 45.42 | 52.50 | 59.90 | 73.30 | 78.29 | 84.23 | 88.65 | 88.50 | a | 80.70 | 71.87 | a | 57.33 | 47.90 | 69.05 | |||||||||||
1988 | 45.03 | 55.24 | 60.00 | 69.57 | 76.70 | a | 86.70 | 88.19 | 89.35 | 81.27 | 75.00 | 64.17 | 53.61 | 70.40 | ||||||||||||
1989 | 58.23 | 43.79 | 70.58 | 78.07 | 81.61 | 82.00 | 90.55 | 89.26 | 81.17 | 77.16 | 67.10 | 48.07 | a | 72.30 | ||||||||||||
1990 | 54.84 | 57.18 | 61.68 | 73.23 | 80.13 | 97.87 | 90.13 | 91.52 | 86.59 | a | 76.13 | 66.07 | 50.27 | a | 73.80 | |||||||||||
1991 | 45.61 | 63.67 | a | 69.27 | a | 77.17 | 83.45 | 87.03 | a | 90.10 | 87.93 | a | 78.86 | a | 74.42 | 54.17 | 49.48 | 71.76 | ||||||||
1992 | 48.37 | d | 58.93 | 66.30 | a | 73.82 | b | 76.32 | 82.63 | 90.16 | 84.80 | a | 83.37 | 76.27 | a | 51.63 | 46.42 | 69.92 | ||||||||
1993 | 44.48 | 48.46 | b | 59.65 | 69.67 | 78.03 | a | 86.93 | 92.30 | a | 89.70 | a | 83.93 | a | ----- | z | ----- | z | ----- | z | 72.57 | c | ||||
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 67.87 | 72.40 | a | 83.80 | 90.94 | 90.81 | 80.50 | 72.97 | 64.43 | 50.48 | 74.91 | c | ||||||||
1996 | 50.26 | 57.28 | 59.32 | 72.70 | 87.48 | 89.93 | b | 90.16 | 86.24 | f | 78.07 | 71.77 | 57.90 | 51.71 | 69.69 | a | ||||||||||
1997 | 45.42 | 48.64 | 66.90 | 61.97 | a | 74.87 | 85.17 | 93.16 | 88.26 | 83.87 | 72.03 | 54.53 | 42.35 | 68.10 | ||||||||||||
1998 | 51.42 | 51.50 | 55.23 | 67.73 | 85.52 | 93.30 | 97.65 | 92.00 | 90.53 | 73.32 | 60.57 | 49.61 | 72.36 | |||||||||||||
1999 | 53.41 | b | 63.87 | e | 58.27 | a | 67.87 | 74.13 | 85.27 | 91.65 | 93.58 | 79.23 | 73.81 | 69.07 | 49.29 | 71.62 | ||||||||||
2000 | 52.97 | a | 61.97 | 62.32 | 71.10 | 83.45 | 81.37 | 91.70 | a | 96.48 | 89.80 | 71.48 | 52.90 | 43.23 | 71.56 | |||||||||||
2001 | 39.61 | 49.61 | 55.58 | 74.77 | 77.16 | 90.60 | 98.77 | 92.06 | 84.73 | 74.84 | 62.43 | 53.74 | 71.16 | |||||||||||||
2002 | 51.97 | 51.00 | 61.26 | 72.73 | 81.13 | 90.00 | 91.43 | a | 90.81 | 83.17 | 64.39 | 56.10 | 45.42 | 69.95 | ||||||||||||
2003 | 53.19 | 49.93 | 63.70 | a | 74.50 | 81.55 | 81.50 | 95.97 | 95.32 | 79.03 | 73.77 | 58.90 | 55.06 | 71.87 | ||||||||||||
2004 | 51.16 | 50.14 | 64.68 | 67.86 | a | 85.41 | b | 87.70 | 89.81 | 88.10 | 84.60 | 71.00 | a | 53.41 | a | 51.03 | a | 70.41 | ||||||||
2005 | 52.35 | 54.86 | 58.26 | 70.40 | 76.61 | 87.53 | 94.42 | 91.03 | 90.53 | 74.32 | 65.83 | 50.32 | 72.21 | |||||||||||||
2006 | 59.81 | 56.32 | 64.16 | 80.70 | 86.81 | 95.47 | 99.06 | 92.61 | 78.20 | 72.52 | 62.10 | 46.32 | 74.51 | |||||||||||||
2007 | 39.03 | 48.93 | 66.35 | 62.73 | 76.26 | 85.96 | f | 95.30 | d | 95.90 | 86.93 | 80.03 | b | 64.17 | 47.57 | a | 69.38 | a | ||||||||
2008 | 51.00 | 55.28 | 66.36 | c | 73.30 | 83.68 | 96.20 | 95.00 | 89.33 | a | 82.62 | a | 71.52 | 63.29 | b | 52.43 | a | 73.33 | ||||||||
2009 | 52.39 | 62.00 | a | 67.90 | b | 72.83 | f | 76.23 | 91.10 | 95.77 | 91.26 | 80.37 | 66.35 | 65.37 | 44.40 | a | 72.10 | a | ||||||||
2010 | 47.87 | 40.21 | 59.16 | 72.59 | a | 77.68 | f | 91.93 | 89.69 | b | 94.97 | 89.77 | 75.87 | 61.03 | 52.28 | b | 70.49 | a | ||||||||
2011 | 49.87 | a | 49.04 | 65.57 | a | 77.63 | 84.03 | 99.20 | 102.72 | b | 101.26 | 85.79 | b | 72.89 | l | 60.63 | 43.20 | a | 74.45 | a | ||||||
2012 | 56.93 | b | 50.59 | 69.54 | e | 77.07 | c | 84.52 | 93.17 | a | 98.30 | a | 94.03 | a | 84.70 | 70.32 | 67.52 | a | 55.67 | a | 75.20 | |||||
2013 | 48.27 | e | 49.73 | b | 63.23 | e | 69.11 | b | 84.93 | d | 93.00 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.04 | f |
2014 | ----- | z | 57.85 | h | 65.39 | 74.47 | 83.55 | 87.80 | 88.17 | b | 92.48 | 80.80 | 76.71 | 60.10 | 50.07 | a | 75.95 | b | ||||||||
2015 | 48.76 | b | 55.33 | a | 67.90 | a | 74.34 | a | 73.26 | 86.19 | c | 89.03 | 89.65 | h | 87.74 | c | 74.59 | d | 63.74 | k | 54.70 | d | 71.18 | b | ||
2016 | 50.97 | b | 62.35 | c | 67.84 | 73.15 | c | 78.72 | b | 88.41 | c | 95.89 | d | 89.23 | 84.52 | e | 81.68 | i | 66.63 | c | 53.93 | d | 73.78 | a | ||
2017 | 53.04 | e | 64.96 | c | 71.83 | a | 71.65 | d | 80.04 | c | 92.82 | b | 94.93 | a | 85.41 | d | 82.61 | b | 74.56 | v | ----- | z | ----- | z | 77.48 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 50.60 | 54.67 | 63.84 | 72.78 | 80.65 | 88.66 | 93.08 | 90.94 | 83.71 | 73.89 | 61.05 | 50.90 | 72.15 | |||||||||||||
S.D. | 5.22 | 6.37 | 4.89 | 4.19 | 4.01 | 3.98 | 3.59 | 3.48 | 3.47 | 3.92 | 4.38 | 4.54 | 1.67 | |||||||||||||
SKEW | -0.45 | -0.20 | -0.35 | -0.39 | 0.20 | 0.47 | 0.46 | 0.28 | 0.20 | -0.16 | -0.16 | -0.48 | -0.14 | |||||||||||||
MAX | 59.81 | 65.90 | 72.16 | 80.70 | 90.00 | 99.20 | 102.72 | 101.26 | 90.53 | 83.16 | 69.07 | 60.97 | 75.47 | |||||||||||||
MIN | 37.81 | 39.68 | 51.26 | 61.97 | 72.40 | 81.37 | 86.81 | 84.45 | 76.93 | 64.39 | 51.63 | 37.00 | 68.10 | |||||||||||||
YRS | 51 | 51 | 52 | 54 | 53 | 54 | 54 | 52 | 53 | 49 | 49 | 52 | 38 |