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 | 47.97 | 35.42 | 21.40 | 18.61 | 30.85 | h | ||||
1959 | 9.87 | a | 16.04 | a | 17.87 | 27.12 | e | 39.81 | 50.28 | a | 50.55 | 52.52 | 41.50 | 29.65 | 16.00 | 18.06 | 30.77 | |||||||||
1960 | 10.65 | 7.48 | 20.87 | 31.50 | 38.17 | a | 48.83 | 52.81 | 50.84 | 46.90 | 36.35 | 22.63 | 17.63 | a | 32.06 | |||||||||||
1961 | 14.63 | a | 17.71 | 22.94 | 26.87 | 39.69 | b | 49.20 | 52.06 | 52.26 | 38.97 | a | 28.97 | 17.67 | 7.19 | 30.68 | ||||||||||
1962 | 3.65 | 15.30 | a | 17.37 | a | 31.40 | 41.19 | 47.24 | a | 53.52 | 50.97 | 44.53 | 35.32 | 23.30 | 16.00 | 31.65 | ||||||||||
1963 | 2.10 | 17.32 | 20.23 | 29.07 | 41.16 | 48.67 | 55.52 | 53.71 | 46.27 | 39.77 | 24.27 | 10.77 | a | 32.40 | ||||||||||||
1964 | 10.57 | a | 7.59 | 15.26 | 26.07 | 38.71 | 45.33 | 54.77 | 49.77 | 43.57 | 32.48 | 22.13 | 14.94 | 30.10 | ||||||||||||
1965 | 15.60 | a | 9.79 | 11.23 | 30.70 | 39.84 | 47.37 | 52.90 | 49.06 | 38.62 | a | 35.29 | 25.00 | 17.13 | 31.04 | |||||||||||
1966 | 5.26 | 9.50 | 20.65 | 24.73 | 37.39 | 47.40 | 58.00 | 51.45 | 45.87 | 30.48 | 23.50 | 12.39 | 30.55 | |||||||||||||
1967 | 14.13 | 13.93 | 22.55 | 28.70 | 34.00 | a | 45.20 | 52.84 | 50.68 | 41.20 | 31.74 | 20.00 | 7.32 | 30.19 | ||||||||||||
1968 | 11.45 | 13.21 | 18.97 | 25.03 | a | 34.53 | a | 47.90 | 53.58 | 51.00 | a | 41.76 | a | 31.90 | 23.00 | 13.48 | 30.49 | |||||||||
1969 | 16.90 | 15.43 | 15.00 | 31.43 | 41.80 | a | 44.27 | 54.80 | a | 54.17 | b | 45.83 | 26.58 | 21.70 | 16.74 | 32.06 | ||||||||||
1970 | 13.29 | 15.43 | 17.10 | 24.03 | 37.71 | 43.20 | 52.55 | 53.13 | 41.69 | a | 30.13 | 22.73 | 16.65 | 30.64 | ||||||||||||
1971 | 15.35 | 17.07 | 17.90 | b | 31.70 | 37.77 | 48.63 | 51.87 | 52.48 | 40.40 | 33.90 | a | ----- | z | ----- | z | 34.71 | b | ||||||||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.27 | 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 | 27.79 | a | 38.52 | 48.50 | 57.29 | 53.77 | 42.70 | 32.10 | 19.90 | 18.81 | 37.71 | c | ||||||||
1976 | 12.81 | 19.96 | a | 21.42 | 32.77 | 36.71 | 48.30 | 54.52 | 51.58 | 42.77 | 27.58 | 18.73 | 12.58 | 31.64 | ||||||||||||
1977 | 6.87 | 16.18 | 18.71 | 28.00 | 38.65 | 51.77 | 56.26 | 50.10 | 44.03 | 27.42 | 15.77 | 11.74 | 30.46 | |||||||||||||
1978 | 5.32 | 7.00 | 17.81 | 22.93 | 31.84 | 45.57 | 52.26 | 50.00 | 44.67 | 34.13 | 21.30 | 8.33 | a | 28.43 | ||||||||||||
1979 | 5.84 | 16.46 | 25.47 | a | 32.47 | 39.03 | 49.37 | 54.10 | 49.90 | 44.00 | 33.81 | 13.30 | 14.97 | a | 31.56 | |||||||||||
1980 | 8.86 | b | 17.55 | 18.10 | 27.90 | 35.16 | 49.60 | 56.06 | 51.74 | 43.03 | 30.58 | 21.33 | 23.53 | a | 31.95 | |||||||||||
1981 | 16.74 | 14.25 | 22.45 | 34.90 | a | 37.52 | 50.17 | 54.45 | 50.16 | 45.43 | 35.35 | 27.80 | 17.35 | 33.88 | ||||||||||||
1982 | 14.22 | d | 15.36 | c | 24.10 | 30.17 | a | 38.81 | 45.40 | 53.48 | 54.55 | 45.37 | 30.84 | 21.83 | a | 16.61 | c | 32.56 | ||||||||
1983 | 19.72 | b | 20.96 | a | 23.31 | e | 26.30 | 36.03 | a | 45.70 | 52.97 | 52.32 | 43.67 | 35.03 | a | 24.11 | c | 8.56 | d | 32.39 | ||||||
1984 | 12.00 | b | 18.29 | a | 21.37 | a | 26.69 | a | 39.39 | 48.33 | 53.13 | 52.97 | 41.37 | 30.31 | b | 22.43 | 16.94 | 31.93 | ||||||||
1985 | 10.42 | 9.64 | 22.76 | b | 32.34 | a | 43.87 | 47.97 | 52.55 | 52.26 | 43.63 | 35.96 | c | 19.83 | a | 15.71 | 32.25 | |||||||||
1986 | 23.96 | c | 23.08 | b | 30.31 | b | 35.37 | c | 41.71 | 51.30 | 55.97 | 52.97 | a | 43.97 | a | 32.97 | b | 21.31 | a | 13.90 | 35.57 | |||||
1987 | 14.16 | 18.89 | a | 22.43 | c | 33.32 | b | 42.16 | 47.67 | 51.06 | 50.58 | 44.27 | 34.97 | 24.17 | 17.18 | c | 33.40 | |||||||||
1988 | 11.38 | b | 21.36 | a | ----- | z | 32.03 | a | 40.90 | a | 53.87 | 53.90 | 54.48 | 42.53 | 35.45 | 22.57 | 10.50 | a | 34.45 | a | ||||||
1989 | 13.29 | 9.29 | 25.89 | l | 31.07 | a | 41.97 | 47.67 | 53.70 | a | 49.53 | a | 41.37 | 28.52 | 19.33 | 8.37 | a | 31.28 | a | |||||||
1990 | 11.83 | a | 13.07 | 21.74 | 28.80 | 34.77 | 47.50 | 50.33 | g | 48.20 | a | 44.33 | 28.90 | 20.37 | 5.19 | 27.70 | a | |||||||||
1991 | 7.53 | a | 16.33 | a | 20.42 | 27.53 | 38.26 | 46.40 | 50.55 | 50.35 | 40.28 | a | 27.47 | a | 16.33 | 13.93 | a | 29.62 | ||||||||
1992 | 13.03 | a | 19.03 | 23.45 | 32.62 | f | 38.65 | 44.87 | 50.19 | 48.61 | 40.30 | g | 29.48 | 14.83 | 9.29 | 29.14 | b | |||||||||
1993 | 8.60 | a | 12.30 | a | 20.80 | f | 27.24 | e | 37.68 | 45.33 | 51.13 | 50.20 | a | 38.28 | a | 28.48 | 14.29 | b | 15.27 | a | 29.89 | a | ||||
1994 | 11.74 | 10.69 | b | 23.10 | 27.83 | 40.34 | b | 50.53 | 49.57 | a | 52.10 | a | 41.60 | 30.73 | a | 20.37 | 17.60 | k | 32.60 | a | ||||||
1995 | 10.12 | e | 15.65 | b | 20.29 | 24.13 | 35.24 | b | 44.59 | a | 48.65 | 52.03 | 40.50 | b | ----- | z | ----- | z | ----- | z | 32.36 | c | ||||
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | 22.77 | 37.42 | 47.50 | 51.35 | 52.23 | 45.57 | 31.07 | b | 18.03 | a | 14.65 | 35.62 | c | |||||||
1998 | 15.94 | 18.08 | c | 20.47 | a | 27.83 | 40.81 | 44.10 | a | 54.87 | 51.77 | 45.41 | a | 32.74 | 25.97 | 13.57 | a | 32.63 | ||||||||
1999 | 16.68 | 18.21 | 23.84 | 26.43 | 37.13 | 45.50 | 57.42 | 55.55 | 42.79 | a | 34.29 | 28.60 | 20.87 | 33.94 | ||||||||||||
2000 | 18.29 | 23.69 | 26.29 | 31.70 | 43.55 | 49.40 | 57.57 | a | 57.16 | 46.87 | 35.71 | 18.13 | 13.74 | 35.17 | ||||||||||||
2001 | 15.68 | 19.07 | 26.03 | 34.48 | a | 42.87 | 51.43 | 58.06 | 55.00 | 46.27 | 34.65 | 26.79 | a | 17.94 | 35.69 | |||||||||||
2002 | 14.83 | a | 15.79 | 18.10 | 32.17 | 39.20 | a | 53.80 | 57.06 | 54.32 | 47.07 | 30.65 | 23.00 | 18.19 | 33.68 | |||||||||||
2003 | 21.29 | 15.71 | 26.29 | 35.20 | 42.29 | 48.73 | 58.06 | 56.00 | c | 42.39 | b | 38.74 | 22.57 | 18.52 | 35.48 | |||||||||||
2004 | 16.03 | 18.41 | 29.32 | 33.00 | 42.71 | 49.27 | 54.42 | 52.00 | 44.87 | 35.52 | 24.70 | 19.45 | 34.97 | |||||||||||||
2005 | 20.97 | 22.21 | 24.58 | 31.53 | 41.52 | 49.43 | 56.30 | a | 54.74 | 48.00 | 35.61 | 25.73 | 14.42 | 35.42 | ||||||||||||
2006 | 19.00 | 15.29 | 22.06 | 33.27 | 42.74 | 52.57 | 57.58 | 55.13 | 40.80 | 33.48 | 24.67 | 17.32 | 34.49 | |||||||||||||
2007 | 10.45 | 16.79 | 29.97 | 30.19 | c | 42.81 | 49.23 | 56.13 | 57.26 | 46.50 | 35.06 | 24.33 | 13.97 | 34.39 | ||||||||||||
2008 | 11.83 | a | 16.66 | 21.71 | 27.34 | a | 38.87 | 48.00 | 57.06 | 54.26 | 43.73 | 34.06 | 26.37 | 13.61 | 32.79 | |||||||||||
2009 | 16.77 | 19.96 | 23.42 | 30.66 | a | 42.74 | 50.30 | 54.61 | 52.16 | 44.57 | b | 27.58 | 27.20 | 9.81 | 33.32 | |||||||||||
2010 | 16.10 | 14.75 | 25.81 | 31.23 | 37.90 | 51.93 | 57.13 | 55.03 | a | 47.20 | 35.58 | 21.20 | 18.45 | 34.36 | ||||||||||||
2011 | 12.58 | 11.43 | 23.74 | 30.73 | 37.65 | 51.00 | 58.35 | 57.94 | 46.27 | 33.42 | 22.83 | 13.52 | 33.29 | |||||||||||||
2012 | 18.87 | 15.03 | 28.84 | 36.00 | 43.19 | 53.97 | 59.16 | 53.77 | 46.37 | 32.48 | 25.70 | 15.58 | 35.75 | |||||||||||||
2013 | 12.06 | 13.57 | 21.26 | 26.27 | 41.84 | 51.93 | 55.52 | 55.47 | a | 50.17 | 32.82 | i | 21.87 | 10.71 | 32.79 | a | ||||||||||
2014 | 13.80 | a | 14.04 | 20.81 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.21 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.06 | 15.60 | 21.87 | 29.58 | 39.30 | 48.47 | 54.36 | 52.55 | 43.88 | 32.57 | 21.82 | 14.49 | 32.59 | |||||||||||||
S.D. | 4.62 | 3.97 | 3.94 | 3.38 | 2.78 | 2.65 | 2.59 | 2.31 | 2.61 | 3.12 | 3.56 | 3.91 | 1.91 | |||||||||||||
SKEW | -0.13 | -0.29 | -0.03 | -0.10 | -0.39 | 0.15 | -0.13 | 0.31 | -0.09 | -0.07 | -0.45 | -0.34 | 0.03 | |||||||||||||
MAX | 23.96 | 23.69 | 30.31 | 36.00 | 43.87 | 53.97 | 59.16 | 57.94 | 50.17 | 39.77 | 28.60 | 23.53 | 35.75 | |||||||||||||
MIN | 2.10 | 7.00 | 11.23 | 22.77 | 31.84 | 43.20 | 48.65 | 48.20 | 38.28 | 26.58 | 13.30 | 5.19 | 28.43 | |||||||||||||
YRS | 50 | 50 | 47 | 50 | 51 | 51 | 50 | 51 | 51 | 50 | 50 | 49 | 40 |