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 | 29.65 | m | 23.19 | 23.19 | k | |
1962 | 16.87 | 27.18 | 28.65 | 41.27 | 55.19 | 58.97 | 64.94 | 61.94 | 57.63 | 45.74 | 35.73 | 27.03 | 43.43 | |||||||||||||
1963 | 10.71 | 26.36 | 34.29 | 46.37 | 54.61 | 60.47 | 66.58 | 63.42 | 58.00 | 49.42 | 33.23 | 20.03 | 43.62 | |||||||||||||
1964 | 22.68 | 20.86 | 27.10 | 40.43 | 52.68 | 58.73 | 65.26 | 64.55 | 57.80 | 43.10 | 33.57 | 25.03 | 42.65 | |||||||||||||
1965 | 25.35 | 21.96 | 24.74 | 42.70 | 52.23 | 59.23 | 63.81 | 61.26 | 54.40 | 43.55 | 38.20 | 30.74 | 43.18 | |||||||||||||
1966 | 16.71 | 21.89 | 33.90 | 40.10 | 50.19 | 60.63 | 68.58 | 61.71 | 56.07 | 41.13 | 35.63 | 21.13 | 42.31 | |||||||||||||
1967 | 24.23 | 24.32 | 37.19 | 47.17 | 47.81 | 61.57 | 63.97 | 60.71 | 54.70 | 45.32 | 32.13 | 24.23 | 43.61 | |||||||||||||
1968 | 25.74 | 23.83 | 34.13 | 39.17 | 48.45 | 59.93 | 63.81 | 63.71 | 53.43 | 45.26 | 32.90 | 20.77 | 42.59 | |||||||||||||
1969 | 26.42 | 26.75 | 26.39 | 43.80 | 52.29 | 58.87 | 67.48 | 65.42 | 58.10 | 42.74 | 30.70 | 25.84 | 43.73 | |||||||||||||
1970 | 18.37 | a | 27.71 | 29.19 | 40.27 | 52.45 | 59.53 | 66.29 | 63.77 | 56.43 | 40.84 | 31.77 | 28.68 | 42.94 | ||||||||||||
1971 | 22.48 | 24.39 | 31.06 | 41.67 | 49.52 | 62.13 | 64.84 | 60.81 | 55.47 | 45.39 | 35.93 | 29.16 | 43.57 | |||||||||||||
1972 | 21.32 | 25.21 | 36.10 | 44.10 | 50.71 | 60.03 | 63.00 | 61.90 | 57.53 | 45.68 | ----- | z | ----- | z | 46.56 | b | ||||||||||
1973 | ----- | z | ----- | z | 35.97 | 37.87 | 48.81 | 57.70 | 63.52 | 62.06 | 56.00 | 46.55 | 34.53 | 23.58 | 46.66 | b | ||||||||||
1974 | 20.23 | 26.04 | 36.61 | 43.87 | 54.48 | 59.63 | 64.52 | 61.87 | 50.33 | 46.94 | 33.20 | 23.55 | 43.44 | |||||||||||||
1975 | 23.90 | 23.64 | 30.87 | 40.73 | 49.19 | 59.70 | 63.55 | 62.35 | 52.37 | 43.29 | 32.37 | 26.52 | 42.37 | |||||||||||||
1976 | 21.52 | 31.07 | 32.39 | 44.57 | 47.03 | 58.47 | 62.52 | 62.45 | 56.52 | a | 39.29 | 26.83 | 22.06 | 42.06 | ||||||||||||
1977 | 16.39 | 28.86 | 33.06 | 44.97 | 55.65 | 62.87 | 66.74 | 65.58 | 58.80 | 45.77 | 31.67 | 25.61 | 44.66 | |||||||||||||
1978 | 17.29 | 19.11 | 32.16 | 45.00 | 51.00 | 63.13 | 66.10 | 62.97 | 57.37 | 45.81 | 36.30 | 21.53 | a | 43.15 | ||||||||||||
1979 | 14.80 | a | 25.04 | 34.71 | 42.43 | 49.55 | 58.43 | 64.48 | 61.19 | 55.30 | 45.65 | 29.17 | a | 25.77 | 42.21 | |||||||||||
1980 | 23.71 | 26.48 | 29.61 | 38.73 | 49.97 | 64.63 | 67.74 | 65.81 | 58.41 | a | 42.35 | 31.40 | 28.42 | 43.94 | ||||||||||||
1981 | 25.13 | 25.82 | 35.35 | 47.30 | 50.55 | 62.77 | 66.55 | 62.61 | 56.80 | 46.13 | 36.73 | 27.19 | 45.24 | |||||||||||||
1982 | 21.50 | a | 22.86 | 33.61 | 41.17 | 51.71 | 58.17 | 65.42 | 65.20 | f | 57.34 | a | 42.23 | 31.53 | 25.68 | 41.02 | a | |||||||||
1983 | 24.16 | 26.68 | 33.45 | 35.90 | 45.73 | a | 55.73 | 64.45 | 65.39 | 58.83 | 48.16 | 35.77 | 14.63 | a | 42.41 | |||||||||||
1984 | 20.48 | 26.66 | 29.87 | a | 36.90 | 51.52 | 62.23 | 63.26 | 63.94 | 53.03 | 44.57 | a | 34.00 | a | 28.87 | 42.94 | ||||||||||
1985 | 19.26 | 24.57 | 36.52 | 44.23 | 54.39 | 61.03 | 63.90 | 64.35 | 56.60 | 45.84 | 30.70 | 22.23 | 43.64 | |||||||||||||
1986 | 27.19 | 28.57 | 38.68 | 45.47 | 52.00 | a | 62.13 | 67.00 | 63.74 | 58.97 | 45.52 | 31.10 | 27.32 | 45.64 | ||||||||||||
1987 | 22.74 | 32.29 | 30.71 | 40.34 | a | 53.42 | 60.77 | 63.97 | 63.61 | 55.07 | 42.13 | a | 33.00 | 23.67 | a | 43.48 | ||||||||||
1988 | 19.90 | a | 23.59 | 29.68 | 40.21 | a | 51.52 | 60.97 | 64.55 | 64.39 | 54.97 | 44.58 | 34.97 | 26.29 | 42.97 | |||||||||||
1989 | 24.97 | 20.93 | a | 34.19 | 45.47 | 54.84 | 58.87 | 64.00 | 64.10 | 52.27 | 46.19 | 33.07 | 18.42 | 43.11 | ||||||||||||
1990 | 26.29 | 27.71 | 33.84 | 42.90 | 49.94 | 65.27 | 63.73 | a | 62.90 | 59.80 | 44.90 | 35.97 | 19.84 | 44.42 | ||||||||||||
1991 | 21.77 | 30.96 | 35.68 | 43.50 | 54.58 | 62.23 | 64.52 | 63.58 | 55.87 | 44.55 | 30.63 | 28.94 | 44.73 | |||||||||||||
1992 | 26.70 | d | 32.45 | 36.87 | 45.50 | 52.03 | 59.20 | 64.23 | 60.94 | 56.53 | 44.87 | 29.00 | a | 24.77 | 44.42 | |||||||||||
1993 | 23.70 | a | 25.14 | 33.40 | a | 39.13 | 51.42 | 61.07 | 67.13 | 64.03 | 53.73 | ----- | z | ----- | z | ----- | z | 46.53 | c | |||||||
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 36.00 | 46.00 | b | 54.67 | 61.45 | 62.84 | 54.62 | a | 39.87 | 30.07 | 23.26 | 45.42 | c | |||||||
1996 | 16.58 | 24.43 | a | 23.19 | 36.77 | 53.43 | a | 59.07 | c | 62.90 | 62.08 | f | 52.27 | 41.77 | 29.37 | 21.55 | 38.30 | a | ||||||||
1997 | 19.87 | 24.79 | 29.10 | 34.07 | 47.61 | 56.97 | 63.23 | 61.90 | 57.60 | 41.61 | 28.50 | 22.23 | 40.62 | |||||||||||||
1998 | 23.48 | 28.57 | 26.71 | 35.47 | 51.10 | 57.67 | 64.13 | 61.29 | 57.83 | 46.48 | 34.17 | 22.90 | 42.48 | |||||||||||||
1999 | 22.76 | b | 27.35 | e | 30.06 | 38.00 | 47.45 | 57.80 | 63.65 | 63.03 | 52.97 | 40.29 | 33.57 | 23.03 | 41.66 | |||||||||||
2000 | 21.63 | a | 25.75 | a | 31.55 | 39.60 | 49.77 | 58.87 | 63.10 | a | 62.70 | a | 53.10 | 46.13 | 24.90 | 17.42 | 41.21 | |||||||||
2001 | 21.55 | 24.93 | 30.50 | a | 40.80 | 49.07 | b | 58.40 | 65.32 | 61.97 | 52.03 | 40.13 | 36.60 | 24.03 | 42.11 | |||||||||||
2002 | 21.00 | 21.86 | 22.48 | 41.76 | a | 46.42 | 60.43 | 61.97 | 61.40 | a | 53.50 | 41.03 | 30.03 | 23.65 | 40.46 | |||||||||||
2003 | 23.42 | 21.36 | 30.47 | a | 38.90 | 49.55 | 56.53 | 63.32 | 63.58 | 52.23 | 44.35 | 30.47 | 22.84 | 41.42 | ||||||||||||
2004 | 21.90 | 22.21 | 36.55 | 40.50 | b | 50.14 | b | 58.43 | 61.57 | a | 59.06 | 54.23 | 44.53 | a | 33.56 | c | 23.54 | c | 42.18 | |||||||
2005 | 24.74 | 29.64 | 27.94 | 36.73 | 47.03 | 56.67 | 61.10 | 61.40 | a | 57.07 | 43.32 | 30.50 | 19.97 | 41.34 | ||||||||||||
2006 | 23.77 | 20.64 | 32.35 | 42.00 | a | 52.81 | 60.93 | 66.03 | 64.10 | 50.60 | 43.55 | 30.80 | 22.81 | 42.53 | ||||||||||||
2007 | 18.55 | 22.00 | a | 36.83 | a | 37.41 | a | 50.84 | 57.33 | f | 61.19 | d | 63.71 | 56.23 | 43.86 | b | 29.33 | 21.41 | b | 40.12 | a | |||||
2008 | 19.03 | 21.28 | 29.43 | c | 36.33 | 48.39 | 59.90 | 64.45 | 62.23 | a | 52.21 | a | 42.13 | 30.86 | a | 20.00 | a | 40.52 | ||||||||
2009 | 18.13 | 24.26 | a | 32.14 | b | 38.62 | f | 48.97 | 59.73 | 63.29 | 61.06 | 52.07 | 39.00 | 33.50 | 16.79 | b | 40.81 | a | ||||||||
2010 | 18.16 | 19.07 | 29.61 | 40.62 | a | 46.12 | f | 62.67 | 64.48 | b | 63.65 | 57.13 | 43.90 | 26.67 | 22.93 | b | 40.81 | a | ||||||||
2011 | 18.80 | a | 17.18 | 30.47 | a | 39.13 | 45.68 | 61.00 | 66.31 | b | 65.45 | 52.48 | a | 41.53 | l | 31.87 | 24.10 | a | 41.13 | a | ||||||
2012 | 22.83 | b | 25.07 | 36.27 | e | 44.15 | c | 52.77 | 61.69 | a | 65.47 | a | 62.50 | a | 53.73 | 39.84 | 31.72 | a | 23.43 | a | 43.29 | |||||
2013 | 19.38 | e | 22.81 | b | 30.96 | e | 34.04 | b | 50.04 | d | 61.93 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.53 | f |
2014 | ----- | z | 24.65 | h | 30.61 | 41.07 | 51.13 | 62.27 | 64.38 | b | 64.42 | 58.10 | 47.61 | 30.03 | 28.10 | a | 47.77 | b | ||||||||
2015 | 24.57 | a | 24.78 | a | 34.90 | a | 44.28 | a | 51.03 | 63.74 | c | 65.74 | 64.52 | h | 61.38 | d | 49.48 | d | 34.95 | j | 28.48 | d | 44.84 | b | ||
2016 | 24.62 | b | 31.07 | b | 36.90 | 43.37 | c | 49.38 | b | 63.41 | c | 68.11 | d | 64.16 | 58.76 | e | 47.73 | i | 38.48 | c | 23.63 | d | 45.63 | a | ||
2017 | 24.73 | e | 32.04 | c | 37.33 | a | 44.04 | d | 49.39 | c | 62.71 | b | 66.40 | a | 63.44 | d | 57.71 | b | 53.78 | v | ----- | z | ----- | z | 48.65 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.58 | 25.19 | 32.15 | 41.08 | 50.62 | 60.20 | 64.59 | 62.96 | 55.60 | 44.05 | 32.33 | 23.79 | 42.91 | |||||||||||||
S.D. | 3.43 | 3.54 | 3.75 | 3.39 | 2.53 | 2.25 | 1.76 | 1.47 | 2.56 | 2.55 | 2.94 | 3.39 | 1.23 | |||||||||||||
SKEW | -0.69 | 0.18 | -0.48 | -0.19 | 0.00 | -0.06 | 0.17 | -0.12 | -0.13 | -0.11 | -0.08 | -0.25 | -0.02 | |||||||||||||
MAX | 27.19 | 32.45 | 38.68 | 47.30 | 55.65 | 65.27 | 68.58 | 65.81 | 61.38 | 49.48 | 38.48 | 30.74 | 45.64 | |||||||||||||
MIN | 10.71 | 17.18 | 22.48 | 34.04 | 45.68 | 54.67 | 61.10 | 59.06 | 50.33 | 39.00 | 24.90 | 14.63 | 40.46 | |||||||||||||
YRS | 52 | 52 | 54 | 54 | 54 | 54 | 54 | 51 | 54 | 50 | 50 | 52 | 40 |