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 | 40.53 | m | 37.08 | 37.08 | k | |
1962 | 32.81 | 45.55 | 46.56 | 57.57 | 72.60 | 72.22 | 77.85 | 77.53 | 71.25 | 62.03 | 49.23 | 41.61 | 58.90 | |||||||||||||
1963 | 29.45 | 43.89 | 51.32 | 63.08 | 70.56 | 74.63 | 82.02 | 78.15 | 72.22 | 66.29 | 49.25 | 33.69 | 59.55 | |||||||||||||
1964 | 39.19 | 32.60 | 45.52 | 58.63 | 68.68 | 74.18 | 81.45 | 79.42 | 70.82 | 60.29 | 47.07 | 39.73 | 58.13 | |||||||||||||
1965 | 41.37 | 39.59 | 39.89 | 60.38 | 67.44 | 72.05 | 78.90 | 76.63 | 70.10 | 60.13 | 53.32 | 43.77 | 58.63 | |||||||||||||
1966 | 30.31 | 35.95 | 51.60 | 56.00 | 66.37 | 73.58 | 81.66 | 73.11 | 68.23 | 57.10 | 51.40 | 36.44 | 56.81 | |||||||||||||
1967 | 41.21 | 41.14 | 54.48 | 61.52 | 63.65 | 73.90 | 76.19 | 73.90 | 67.67 | 61.15 | 46.87 | 36.87 | 58.21 | |||||||||||||
1968 | 39.63 | 38.24 | 48.81 | 54.98 | 62.48 | 73.68 | 76.11 | 75.32 | 67.95 | 61.97 | 45.42 | 36.84 | 56.79 | |||||||||||||
1969 | 41.39 | 40.38 | 38.82 | 59.28 | 66.02 | 72.55 | 81.00 | 78.94 | 69.07 | 54.11 | 46.72 | 39.24 | 57.29 | |||||||||||||
1970 | 33.15 | a | 44.66 | 42.39 | 55.43 | 68.37 | 74.47 | 79.81 | 77.79 | 71.17 | 55.26 | 47.10 | 44.82 | 57.87 | ||||||||||||
1971 | 38.76 | 40.18 | 49.31 | 57.77 | 66.02 | 76.42 | 78.47 | 72.63 | 68.28 | 59.39 | 48.17 | 39.95 | 57.94 | |||||||||||||
1972 | 38.02 | 43.53 | 54.13 | 61.82 | 64.52 | 73.82 | 75.44 | 74.82 | 71.67 | 59.42 | ----- | z | ----- | z | 61.72 | b | ||||||||||
1973 | ----- | z | ----- | z | 47.95 | 51.48 | 63.23 | 73.88 | 77.24 | 77.15 | 68.85 | 62.05 | 50.50 | 39.40 | 61.17 | b | ||||||||||
1974 | 36.16 | 44.27 | 53.77 | 59.88 | 71.63 | 74.23 | 79.63 | 74.16 | 63.63 | 59.18 | 45.83 | 37.18 | 58.30 | |||||||||||||
1975 | 39.26 | 36.73 | 46.32 | 56.00 | 64.66 | 73.85 | 75.18 | 76.35 | 66.87 | 61.77 | 46.55 | 41.95 | 57.12 | |||||||||||||
1976 | 38.56 | 48.48 | 49.19 | 58.85 | 62.39 | 74.67 | 76.29 | 77.56 | 69.29 | a | 53.74 | 42.35 | 38.63 | 57.50 | ||||||||||||
1977 | 30.74 | 44.54 | 49.16 | 57.82 | 67.21 | 76.97 | 80.81 | 77.94 | 74.05 | 61.52 | 48.12 | 40.94 | 59.15 | |||||||||||||
1978 | 29.71 | 29.39 | 48.73 | 61.52 | 64.48 | 76.20 | 82.19 | 77.34 | 71.23 | 60.16 | 47.18 | 35.50 | a | 56.97 | ||||||||||||
1979 | 26.37 | a | 39.41 | 48.48 | 56.05 | 64.19 | 72.70 | 77.61 | 74.63 | a | 71.42 | 63.39 | 42.14 | b | 40.48 | 56.41 | ||||||||||
1980 | 36.10 | 40.76 | 46.11 | 54.88 | 63.98 | 79.43 | 84.10 | 80.47 | 72.83 | a | 58.84 | 44.98 | 43.35 | 58.82 | ||||||||||||
1981 | 39.71 | 43.64 | 48.79 | 62.63 | 65.47 | a | 78.35 | 79.77 | 75.23 | 70.27 | 58.68 | 49.53 | 40.82 | 59.41 | ||||||||||||
1982 | 37.75 | a | 37.20 | 48.97 | 57.00 | 65.55 | 70.95 | 78.58 | 78.34 | f | 72.76 | e | 58.11 | c | 45.50 | b | 36.77 | c | 55.38 | a | ||||||
1983 | 35.28 | a | 37.76 | c | 45.79 | 51.63 | c | 62.31 | e | 70.67 | c | 79.53 | b | 81.31 | b | 74.00 | a | 61.07 | d | 50.42 | f | 26.40 | e | 56.89 | a | |
1984 | 34.23 | e | 42.55 | g | 45.98 | i | 51.81 | c | 67.64 | c | 75.60 | 77.80 | a | 77.52 | 71.24 | g | 57.58 | g | 47.20 | e | 40.98 | c | 59.10 | d | ||
1985 | 32.85 | g | 37.50 | e | 51.15 | h | 60.62 | e | 69.69 | g | 74.72 | e | 79.45 | b | 79.37 | a | 69.77 | 57.74 | 43.82 | 34.23 | 59.69 | c | ||||
1986 | 43.21 | 41.29 | 54.34 | 61.29 | a | 66.93 | b | 73.83 | a | 80.35 | 75.08 | 70.09 | a | 56.65 | 43.87 | 37.81 | 58.73 | |||||||||
1987 | 34.08 | 42.39 | 45.31 | 57.02 | a | 65.85 | 72.50 | 76.31 | 76.18 | a | 67.88 | 57.00 | a | 45.17 | 36.02 | a | 56.31 | |||||||||
1988 | 32.35 | a | 39.41 | 44.84 | 55.00 | a | 64.18 | a | 73.83 | 76.37 | 76.87 | 68.12 | 59.79 | 49.57 | 39.95 | 56.69 | ||||||||||
1989 | 41.60 | 32.11 | a | 52.39 | 61.77 | 68.23 | 70.43 | 77.27 | 76.68 | 66.72 | 61.68 | 50.08 | 33.38 | a | 57.69 | |||||||||||
1990 | 40.56 | 42.45 | 47.76 | 58.07 | 65.03 | 81.57 | 76.83 | a | 77.21 | 73.16 | a | 60.52 | 51.02 | 35.27 | a | 59.12 | ||||||||||
1991 | 33.69 | 47.52 | a | 52.58 | a | 60.33 | 69.02 | 74.66 | a | 77.31 | 75.73 | a | 67.50 | a | 59.48 | 42.40 | 39.21 | 58.29 | ||||||||
1992 | 37.54 | d | 45.69 | 51.50 | a | 59.41 | b | 64.18 | 70.92 | 77.19 | 72.85 | a | 69.95 | 60.52 | a | 40.14 | a | 35.60 | 57.12 | |||||||
1993 | 34.32 | a | 36.37 | b | 46.77 | a | 54.40 | 64.88 | a | 74.00 | 79.75 | a | 76.98 | a | 68.76 | a | ----- | z | ----- | z | ----- | z | 59.58 | c | ||
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 51.93 | 59.17 | b | 69.23 | 76.19 | 76.82 | 68.29 | a | 56.42 | 47.25 | 36.87 | 60.24 | c | |||||||
1996 | 33.42 | 41.43 | a | 41.26 | 54.73 | 70.68 | a | 74.57 | c | 76.53 | 74.16 | f | 65.17 | 56.77 | 43.63 | 36.63 | 54.08 | a | ||||||||
1997 | 32.65 | 36.71 | 48.00 | 48.02 | a | 61.24 | 71.07 | 78.19 | 75.08 | 70.73 | 56.82 | 41.52 | 32.29 | 54.36 | ||||||||||||
1998 | 37.45 | 40.04 | 40.97 | 51.60 | 68.31 | 75.48 | 80.89 | 76.65 | 74.18 | 59.90 | 47.37 | 36.26 | 57.42 | |||||||||||||
1999 | 38.09 | b | 45.61 | e | 44.30 | a | 52.93 | 60.79 | 71.53 | 77.65 | 78.31 | 66.10 | 57.05 | 51.32 | 36.16 | 56.65 | ||||||||||
2000 | 37.30 | a | 43.77 | a | 46.94 | 55.35 | 66.61 | 70.12 | 77.40 | a | 79.65 | a | 71.45 | 58.81 | 38.90 | 30.32 | 56.38 | |||||||||
2001 | 30.58 | 37.27 | 43.33 | a | 57.78 | 62.76 | b | 74.50 | 82.05 | 77.02 | 68.38 | 57.48 | 49.52 | 38.89 | 56.63 | |||||||||||
2002 | 36.48 | 36.43 | 41.87 | 57.22 | a | 63.77 | 75.22 | 76.73 | a | 76.07 | a | 68.33 | 52.71 | 43.07 | 34.53 | 55.20 | ||||||||||
2003 | 38.31 | 35.64 | 47.08 | a | 56.70 | 65.55 | 69.02 | 79.65 | 79.45 | 65.63 | 59.06 | 44.68 | 38.95 | 56.64 | ||||||||||||
2004 | 36.53 | 36.17 | 50.61 | 54.41 | b | 67.78 | b | 73.07 | 75.67 | a | 73.58 | 69.42 | 57.77 | a | 43.41 | c | 37.89 | c | 56.36 | |||||||
2005 | 38.55 | 42.25 | 43.10 | 53.57 | 61.82 | 72.10 | 77.76 | 76.20 | a | 73.80 | 58.82 | 48.17 | 35.15 | 56.77 | ||||||||||||
2006 | 41.79 | 38.48 | 48.26 | 61.48 | a | 69.81 | 78.20 | 82.55 | 78.35 | 64.40 | 58.03 | 46.45 | 34.56 | 58.53 | ||||||||||||
2007 | 28.79 | 35.80 | a | 51.48 | a | 50.55 | a | 63.55 | 71.65 | f | 78.24 | d | 79.81 | 71.58 | 61.95 | b | 46.75 | 34.62 | b | 54.83 | a | |||||
2008 | 35.02 | 38.28 | 47.89 | c | 54.82 | 66.03 | 78.05 | 79.73 | 75.78 | a | 67.41 | a | 56.82 | 47.14 | b | 36.22 | a | 56.93 | ||||||||
2009 | 35.26 | 43.13 | a | 50.02 | b | 55.73 | f | 62.60 | 75.42 | 79.53 | 76.16 | 66.22 | 52.68 | 49.43 | 30.43 | b | 56.44 | a | ||||||||
2010 | 33.02 | 29.64 | 44.39 | 56.60 | a | 61.90 | f | 77.30 | 77.09 | b | 79.31 | 73.45 | 59.89 | 43.85 | 37.60 | b | 55.65 | a | ||||||||
2011 | 34.33 | a | 33.11 | 48.02 | a | 58.38 | 64.85 | 80.10 | 84.52 | b | 83.35 | 69.11 | b | 57.21 | l | 46.25 | 33.65 | a | 57.79 | a | ||||||
2012 | 39.88 | b | 37.83 | 52.90 | e | 60.61 | c | 68.65 | 77.43 | a | 81.88 | a | 78.27 | a | 69.22 | 55.08 | 49.62 | a | 39.55 | a | 59.24 | |||||
2013 | 33.83 | e | 36.27 | b | 47.10 | e | 51.57 | b | 67.48 | d | 77.46 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.28 | f |
2014 | ----- | z | 41.25 | h | 48.00 | 57.77 | 67.34 | 75.03 | 76.28 | b | 78.45 | 69.45 | 62.16 | 45.07 | 39.08 | a | 61.86 | b | ||||||||
2015 | 36.79 | b | 40.06 | a | 51.40 | a | 59.31 | a | 62.15 | 74.96 | c | 77.39 | 77.09 | h | 74.81 | d | 62.04 | d | 49.71 | k | 41.59 | d | 58.05 | b | ||
2016 | 37.79 | b | 46.60 | c | 52.37 | 58.26 | c | 64.05 | b | 75.91 | c | 82.00 | d | 76.69 | 71.64 | e | 64.70 | i | 52.56 | c | 38.78 | d | 59.70 | a | ||
2017 | 38.88 | e | 48.50 | c | 54.58 | a | 57.85 | d | 64.71 | c | 77.77 | b | 80.67 | a | 74.43 | d | 70.16 | b | 64.17 | v | ----- | z | ----- | z | 63.06 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.10 | 39.91 | 47.99 | 56.95 | 65.61 | 74.43 | 78.83 | 76.95 | 69.71 | 58.96 | 46.66 | 37.38 | 57.54 | |||||||||||||
S.D. | 3.85 | 4.56 | 3.93 | 3.49 | 2.85 | 2.71 | 2.31 | 2.20 | 2.63 | 2.80 | 3.20 | 3.51 | 1.20 | |||||||||||||
SKEW | -0.39 | -0.18 | -0.29 | -0.35 | 0.26 | 0.27 | 0.49 | 0.29 | -0.08 | -0.19 | -0.18 | -0.49 | -0.29 | |||||||||||||
MAX | 43.21 | 48.50 | 54.58 | 63.08 | 72.60 | 81.57 | 84.52 | 83.35 | 74.81 | 66.29 | 53.32 | 44.82 | 59.55 | |||||||||||||
MIN | 26.37 | 29.39 | 38.82 | 48.02 | 59.17 | 69.02 | 75.18 | 72.63 | 63.63 | 52.68 | 38.90 | 26.40 | 54.36 | |||||||||||||
YRS | 51 | 51 | 52 | 54 | 53 | 54 | 54 | 51 | 53 | 49 | 49 | 52 | 37 |