YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 64.07 | 51.82 | 38.50 | 33.02 | 46.85 | h | ||||
1959 | 27.08 | a | 29.74 | a | 34.71 | 44.65 | f | 55.34 | 66.74 | a | 68.81 | 70.48 | 58.62 | 45.71 | 34.76 | a | 33.81 | 47.80 | a | |||||||
1960 | 25.11 | 20.55 | 34.52 | 47.72 | 54.81 | b | 65.47 | 68.58 | 69.65 | 62.60 | a | 51.31 | 38.97 | 29.93 | a | 47.43 | ||||||||||
1961 | 31.12 | a | 33.39 | 35.71 | 42.48 | a | 53.71 | b | 64.92 | 68.55 | 67.24 | 55.09 | a | 48.32 | a | 33.87 | 23.58 | 46.50 | ||||||||
1962 | 21.31 | 32.83 | b | 33.17 | a | 47.90 | a | 58.37 | 62.67 | a | 69.11 | 71.00 | a | 62.09 | b | 53.13 | 39.85 | 32.55 | 48.66 | |||||||
1963 | 21.02 | a | 36.06 | a | 37.02 | 47.65 | 59.74 | 66.95 | 73.34 | 67.68 | 62.40 | 58.06 | 40.62 | a | 27.57 | a | 49.84 | |||||||||
1964 | 28.19 | b | 24.05 | 31.28 | a | 45.22 | 56.97 | 63.50 | 74.08 | 68.05 | 60.50 | 51.32 | 37.15 | 32.05 | 47.70 | |||||||||||
1965 | 33.68 | a | 28.50 | 25.18 | a | 48.47 | 56.84 | 61.32 | 69.95 | a | 65.31 | 53.10 | a | 52.98 | 42.22 | 34.08 | 47.64 | |||||||||
1966 | 23.52 | 25.95 | 39.63 | 44.25 | 57.13 | 65.30 | 74.58 | 66.84 | 61.37 | 48.53 | 40.90 | 29.25 | a | 48.10 | ||||||||||||
1967 | 31.58 | 32.64 | 41.61 | 47.95 | a | 51.65 | a | 60.27 | 67.61 | 66.16 | 59.57 | 49.53 | b | 38.22 | 22.94 | 47.48 | ||||||||||
1968 | 28.71 | 30.62 | a | 38.08 | 42.43 | a | 51.23 | a | 66.27 | 68.74 | 65.45 | a | 60.29 | a | 51.77 | 36.48 | a | 30.85 | 47.58 | |||||||
1969 | 33.81 | 32.75 | 29.23 | a | 47.62 | a | 56.07 | a | 60.37 | 71.55 | a | 70.69 | b | 61.52 | 39.23 | 37.77 | 31.77 | 47.70 | ||||||||
1970 | 30.53 | a | 34.88 | 33.32 | 41.79 | b | 57.24 | 62.08 | 69.34 | 70.65 | 60.79 | b | 45.65 | a | 39.54 | b | 33.73 | 48.29 | ||||||||
1971 | 31.50 | 32.46 | a | 36.78 | b | 47.39 | b | 54.50 | a | 68.48 | 68.23 | 68.00 | 56.77 | 50.52 | b | ----- | z | ----- | z | 51.46 | b | |||||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.45 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | 43.00 | a | 53.05 | 63.60 | 71.76 | 68.90 | 57.88 | b | 49.92 | a | 33.30 | 32.27 | a | 52.63 | c | |||||
1976 | 27.60 | 34.91 | b | 35.18 | 46.50 | 52.10 | 65.10 | a | 70.10 | 66.94 | 57.40 | 43.82 | 33.83 | 29.64 | c | 46.93 | ||||||||||
1977 | 23.44 | 31.64 | 34.02 | a | 44.17 | 55.45 | 67.32 | 69.97 | 65.28 | a | 62.10 | a | 47.25 | a | 34.40 | 28.82 | a | 46.99 | ||||||||
1978 | 20.69 | 21.71 | 36.38 | a | 42.22 | 48.56 | 62.68 | 70.39 | 65.60 | 61.25 | 50.05 | 35.48 | 22.08 | a | 44.76 | |||||||||||
1979 | 17.45 | 31.95 | 38.63 | a | 46.78 | 51.76 | 63.70 | 69.18 | 65.05 | 61.47 | 51.48 | 27.37 | 30.28 | a | 46.26 | |||||||||||
1980 | 22.12 | b | 31.76 | 32.21 | 43.15 | 49.87 | 66.23 | 72.17 | a | 68.61 | 60.12 | 47.73 | 37.05 | 39.97 | a | 47.58 | ||||||||||
1981 | 32.65 | a | 31.27 | 35.65 | 51.24 | a | 52.18 | 66.40 | 70.31 | 64.34 | 61.28 | 48.85 | 42.02 | 30.85 | 48.92 | |||||||||||
1982 | 28.80 | h | 30.30 | f | 38.03 | a | 46.88 | f | 53.61 | d | 59.41 | c | 68.93 | b | 68.18 | a | 58.06 | d | 47.55 | b | 36.57 | b | 30.04 | e | 51.15 | c |
1983 | 32.19 | b | 32.72 | a | 35.09 | h | 38.96 | b | 50.19 | e | 59.91 | c | 69.90 | a | 68.81 | 62.00 | c | 51.10 | f | 38.93 | g | 19.26 | h | 51.84 | d | |
1984 | 25.25 | e | 32.38 | d | 33.39 | c | 40.24 | c | 54.91 | b | 63.12 | a | 69.40 | 66.90 | a | 58.74 | e | 41.09 | d | 36.15 | d | 31.70 | d | 46.11 | ||
1985 | 23.46 | c | 24.23 | 36.56 | d | 47.44 | d | 57.56 | d | 63.28 | c | 68.10 | 68.91 | c | 57.77 | f | 50.40 | f | 33.48 | h | 28.46 | d | 46.44 | c | ||
1986 | 39.20 | f | 37.35 | e | 45.48 | f | 49.89 | g | 56.72 | f | 66.56 | d | 70.45 | 68.24 | f | 60.18 | h | 48.67 | h | 37.50 | h | 28.12 | a | 50.62 | h | |
1987 | 26.90 | b | 32.71 | g | 36.11 | h | 47.23 | d | 54.73 | a | 63.43 | c | 69.46 | c | 65.63 | h | 59.07 | b | 51.08 | g | 37.29 | d | 30.74 | h | 51.16 | e |
1988 | 24.77 | i | 34.91 | f | ----- | z | 46.98 | d | 55.96 | d | 67.61 | b | 70.02 | a | 70.82 | c | 59.00 | a | 51.89 | 37.32 | 24.90 | a | 53.83 | c | ||
1989 | 28.05 | 21.38 | 42.25 | m | 47.12 | a | 55.65 | 60.82 | 69.55 | a | 63.75 | a | 55.85 | 44.44 | 34.80 | b | 21.78 | a | 45.74 | a | ||||||
1990 | 26.13 | a | 25.30 | 33.21 | 42.52 | 48.44 | 63.83 | 64.31 | g | 62.78 | a | 58.80 | 44.19 | 35.70 | 21.33 | b | 42.02 | a | ||||||||
1991 | 21.90 | a | 32.09 | a | 33.85 | 40.58 | 52.87 | 61.83 | 65.33 | a | 64.16 | 55.50 | a | 44.50 | a | 27.29 | a | 24.95 | a | 43.74 | ||||||
1992 | 25.45 | a | 31.86 | 36.50 | 47.33 | f | 52.85 | 57.42 | 63.77 | 62.00 | 56.61 | g | 46.05 | 26.08 | 22.58 | 42.46 | b | |||||||||
1993 | 20.53 | a | 24.65 | a | 34.02 | f | 41.82 | e | 51.34 | 60.17 | 65.87 | 63.28 | a | 52.69 | a | 43.02 | 26.68 | b | 27.98 | a | 43.46 | a | ||||
1994 | 27.13 | 25.37 | b | 37.18 | a | 43.47 | a | 53.83 | b | 65.27 | 65.45 | a | 66.67 | a | 56.47 | 44.72 | a | 32.35 | 33.08 | k | 47.08 | a | ||||
1995 | 25.08 | e | 31.19 | b | 34.35 | 36.88 | 45.78 | b | 57.53 | a | 64.44 | 67.95 | 54.98 | b | ----- | z | ----- | z | ----- | z | 46.47 | c | ||||
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | 36.65 | 50.68 | 61.07 | 67.11 | 64.35 | 59.42 | 44.93 | b | 28.93 | a | 24.90 | 48.67 | c | |||||||
1998 | 29.40 | 28.86 | c | 33.08 | a | 41.20 | 55.48 | 59.53 | a | 67.32 | 64.71 | 60.76 | a | 46.02 | 38.85 | 26.38 | a | 45.97 | ||||||||
1999 | 30.15 | 34.38 | 38.16 | 38.68 | 50.34 | 59.57 | 71.43 | a | 68.50 | a | 56.09 | a | 50.31 | 44.73 | 33.70 | a | 48.00 | |||||||||
2000 | 32.23 | 38.33 | 38.26 | 47.73 | 58.66 | 64.64 | b | 72.55 | a | 72.20 | a | 63.02 | 48.71 | 30.20 | 27.24 | 49.48 | ||||||||||
2001 | 27.97 | 30.66 | 37.58 | 49.24 | a | 55.29 | 67.02 | a | 73.23 | 69.02 | 62.27 | 50.69 | 40.43 | a | 31.53 | 49.58 | ||||||||||
2002 | 29.17 | a | 29.98 | 33.90 | 48.48 | 55.83 | b | 69.85 | 73.00 | 69.81 | 61.70 | 44.63 | 36.35 | 31.29 | 48.67 | |||||||||||
2003 | 34.65 | 27.64 | 38.73 | 49.02 | 56.19 | 61.83 | 74.92 | 72.05 | c | 57.45 | b | 54.32 | 35.63 | 33.17 | a | 49.63 | ||||||||||
2004 | 30.26 | 29.55 | 43.53 | 46.86 | a | 58.08 | 62.37 | 67.56 | 64.82 | 60.20 | 49.58 | 35.78 | 32.35 | 48.41 | ||||||||||||
2005 | 34.03 | 34.02 | 37.85 | 44.30 | 54.90 | 64.60 | 72.90 | a | 68.53 | 62.87 | 48.98 | 40.35 | 27.85 | 49.27 | ||||||||||||
2006 | 34.44 | 29.77 | 36.77 | 49.52 | 58.11 | 69.02 | 71.50 | 67.63 | 54.70 | 47.48 | 39.48 | 27.66 | 48.84 | |||||||||||||
2007 | 21.95 | 30.25 | 43.16 | 42.87 | c | 56.00 | 63.92 | 71.40 | 71.44 | 62.40 | 51.26 | 40.22 | 25.95 | 48.40 | ||||||||||||
2008 | 25.50 | a | 30.38 | 36.60 | 43.26 | a | 54.74 | 64.37 | 72.94 | 67.48 | 58.93 | 49.50 | 40.83 | 26.97 | 47.62 | |||||||||||
2009 | 30.97 | 35.73 | 39.76 | 44.33 | a | 56.26 | 63.22 | 69.00 | 67.00 | 58.14 | b | 40.55 | 40.82 | 21.97 | 47.31 | |||||||||||
2010 | 29.65 | 25.73 | 38.85 | a | 46.02 | 52.50 | 68.07 | 71.68 | 69.77 | a | 64.85 | 51.61 | 37.03 | 32.94 | 49.06 | |||||||||||
2011 | 27.35 | 25.62 | 39.66 | 46.73 | 51.35 | 67.65 | 74.15 | 72.98 | 60.70 | 49.23 | 37.83 | 26.56 | 48.32 | |||||||||||||
2012 | 33.63 | 25.98 | 44.52 | 50.93 | 58.32 | 71.18 | 74.84 | 69.79 | 62.12 | 47.31 | 42.18 | 29.66 | 50.87 | |||||||||||||
2013 | 27.68 | 27.52 | 35.02 | 40.82 | 56.13 | 68.33 | 69.92 | 69.32 | a | 63.93 | 47.41 | i | 36.50 | 25.95 | 47.37 | a | ||||||||||
2014 | 28.40 | a | 27.71 | 36.81 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.97 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.67 | 29.96 | 36.31 | 44.85 | 54.26 | 64.03 | 70.05 | 67.66 | 59.61 | 48.25 | 36.57 | 28.87 | 47.87 | |||||||||||||
S.D. | 4.34 | 4.21 | 3.61 | 3.58 | 3.02 | 3.20 | 2.68 | 2.63 | 2.92 | 3.78 | 4.32 | 4.05 | 1.45 | |||||||||||||
SKEW | -0.28 | -0.33 | -0.27 | -0.40 | -0.54 | -0.01 | -0.18 | -0.11 | -0.51 | -0.17 | -0.79 | 0.01 | -0.65 | |||||||||||||
MAX | 34.65 | 38.33 | 44.52 | 51.24 | 59.74 | 71.18 | 74.92 | 72.98 | 64.85 | 58.06 | 44.73 | 39.97 | 50.87 | |||||||||||||
MIN | 17.45 | 20.55 | 25.18 | 36.65 | 45.78 | 57.42 | 63.77 | 62.00 | 52.69 | 39.23 | 26.08 | 21.33 | 43.74 | |||||||||||||
YRS | 47 | 47 | 44 | 47 | 50 | 51 | 50 | 49 | 49 | 46 | 47 | 47 | 34 |