YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 30.35 | 21.57 | 27.77 | 32.43 | 40.77 | 46.83 | 57.26 | 63.71 | 50.80 | 44.48 | 33.20 | 29.16 | 39.86 | |||||||||||||
1956 | 29.90 | 23.30 | b | 30.32 | 40.20 | 47.84 | 56.47 | 61.97 | 58.39 | 53.47 | 40.81 | 28.87 | 24.87 | 41.37 | ||||||||||||
1957 | 34.77 | 37.50 | 37.52 | 38.90 | 42.63 | a | 57.10 | 65.97 | 63.55 | 53.27 | 46.39 | 31.67 | 29.10 | 44.86 | ||||||||||||
1958 | 25.65 | 33.29 | 33.26 | 38.20 | 50.74 | 57.43 | 63.23 | 66.71 | 57.67 | 45.87 | 32.67 | 28.23 | 44.41 | |||||||||||||
1959 | 27.74 | 29.14 | 33.29 | 44.03 | 47.16 | 59.70 | 68.29 | 63.00 | 52.20 | 43.03 | 33.07 | 31.35 | 44.33 | |||||||||||||
1960 | 25.00 | 26.62 | 36.00 | 39.03 | 45.58 | 56.87 | 62.16 | 62.65 | 57.27 | 44.06 | 32.00 | 24.39 | 42.64 | |||||||||||||
1961 | 27.13 | a | 30.61 | 32.35 | 39.67 | 44.74 | 58.63 | 64.55 | b | 62.23 | 52.10 | 39.81 | 31.83 | 27.48 | 42.59 | |||||||||||
1962 | 26.00 | 31.89 | 28.23 | 41.73 | 43.32 | 52.03 | 61.65 | 63.03 | 57.85 | c | 42.86 | c | 36.88 | d | 30.09 | i | 44.13 | a | ||||||||
1963 | 24.19 | 32.12 | c | 29.96 | g | 32.00 | o | 43.35 | 44.97 | a | 59.81 | 64.55 | b | 56.93 | b | 43.61 | c | 33.61 | b | 23.72 | b | 42.69 | b | |||
1964 | 18.11 | c | 22.16 | d | 22.44 | f | 34.68 | b | 41.15 | e | 44.41 | h | 62.24 | b | 63.00 | c | 55.71 | f | 41.26 | d | 26.14 | a | 25.24 | b | 37.11 | c |
1965 | 27.43 | c | 26.38 | b | 30.04 | d | 37.39 | b | 37.00 | 43.59 | c | ----- | z | ----- | z | ----- | z | ----- | z | 29.50 | x | 30.90 | 33.25 | e | ||
1966 | 23.48 | b | 24.33 | a | 31.27 | a | 35.37 | 44.22 | d | 50.48 | a | 61.90 | a | 62.54 | c | 55.17 | f | 39.62 | g | 31.41 | a | 26.57 | a | 39.16 | b | |
1967 | 24.90 | b | 24.25 | 28.53 | a | 30.79 | a | 41.32 | 50.23 | 65.40 | a | 64.42 | 56.53 | 41.32 | c | 33.43 | 24.06 | 40.43 | ||||||||
1968 | 25.10 | 34.21 | 33.00 | 35.00 | 40.37 | a | 49.55 | a | 60.94 | 56.27 | a | 47.89 | b | 40.13 | 31.83 | a | 21.16 | 39.62 | ||||||||
1969 | 32.03 | a | 29.36 | 29.90 | a | 34.93 | 42.10 | 48.72 | a | 62.97 | 65.13 | a | 56.20 | e | 37.10 | 34.24 | a | 26.62 | b | 41.61 | ||||||
1970 | 22.29 | 29.64 | 32.48 | b | 29.87 | 41.47 | a | 49.34 | a | 63.61 | c | 64.83 | a | 49.74 | c | 35.42 | 28.86 | a | 24.93 | a | 39.37 | |||||
1971 | 21.32 | 24.93 | a | 27.32 | 32.86 | a | 40.90 | 47.93 | b | 62.96 | c | 64.40 | a | 49.93 | a | 38.21 | g | 27.83 | 25.90 | b | 38.75 | a | ||||
1972 | 18.80 | a | 22.39 | a | 31.17 | a | 35.33 | c | 43.16 | 52.50 | 62.32 | 59.75 | g | 51.38 | a | 46.61 | 30.20 | 26.21 | b | 38.19 | a | |||||
1973 | 24.10 | b | 29.84 | i | 31.58 | 34.00 | a | 42.67 | a | 50.83 | 58.74 | 59.71 | 44.83 | f | 35.55 | 27.64 | b | 22.10 | a | 38.69 | b | |||||
1974 | 26.23 | 21.07 | 32.28 | b | 32.55 | a | 42.10 | 51.43 | 60.87 | 54.10 | b | 54.07 | a | 43.48 | 30.14 | b | 23.43 | a | 39.31 | |||||||
1975 | 22.23 | 25.57 | 28.90 | 29.90 | 38.60 | a | 47.90 | a | 61.90 | a | 56.97 | 54.20 | 37.19 | 25.71 | b | 28.52 | 38.13 | |||||||||
1976 | 24.58 | 31.86 | 30.26 | 33.63 | 44.81 | 48.37 | 62.19 | 56.04 | c | 55.13 | 38.35 | 29.07 | 20.90 | 39.60 | ||||||||||||
1977 | 27.63 | a | 23.93 | 23.42 | 36.00 | 40.52 | 52.17 | 62.32 | 63.10 | 53.53 | 43.24 | b | 31.37 | 29.81 | 40.59 | |||||||||||
1978 | 31.90 | 31.59 | a | 36.90 | 35.17 | a | 39.93 | a | 48.23 | 59.42 | 58.03 | 52.10 | a | 43.39 | 34.27 | 24.77 | 41.31 | |||||||||
1979 | 24.55 | 24.00 | 30.48 | 30.33 | 42.03 | 47.67 | 56.00 | 55.06 | 52.82 | b | 39.77 | 25.53 | 24.77 | 37.75 | ||||||||||||
1980 | 33.19 | 33.76 | 31.29 | 33.47 | 39.29 | 43.77 | 60.94 | 59.74 | 50.07 | a | 37.68 | 28.53 | 29.58 | 40.11 | ||||||||||||
1981 | 27.58 | 27.89 | 32.48 | 38.27 | 44.55 | 56.30 | 65.94 | 62.26 | 54.50 | 40.13 | 30.00 | 27.94 | 42.32 | |||||||||||||
1982 | 27.97 | 33.07 | 34.87 | a | 34.86 | b | 42.42 | 44.66 | a | 58.87 | 64.00 | 52.83 | 35.84 | 33.10 | a | 27.00 | 40.79 | |||||||||
1983 | 25.87 | 31.41 | a | 33.65 | 32.39 | b | 39.53 | a | 45.43 | 59.90 | 61.97 | a | 57.70 | 43.42 | 32.43 | 28.35 | 41.01 | |||||||||
1984 | 25.58 | 21.83 | 28.39 | 32.04 | b | 43.81 | 50.33 | 65.06 | 61.58 | 54.73 | 36.65 | 28.27 | 30.23 | 39.87 | ||||||||||||
1985 | 27.23 | 25.71 | 32.71 | 38.00 | 41.48 | 48.07 | a | 61.84 | 58.10 | 47.70 | 42.58 | 31.53 | 24.52 | 39.96 | ||||||||||||
1986 | 25.52 | 31.71 | 35.52 | 35.67 | 39.84 | 50.97 | 57.77 | 62.93 | a | 46.83 | 35.97 | 28.10 | 25.48 | 39.69 | ||||||||||||
1987 | 22.94 | 28.64 | 28.23 | 37.73 | 44.39 | 50.79 | p | 54.13 | ----- | z | ----- | z | 45.55 | 31.50 | 24.71 | 35.31 | c | |||||||||
1988 | 26.29 | 28.24 | 27.06 | 36.27 | 40.26 | 51.90 | 58.84 | 57.81 | e | 46.77 | 41.74 | 29.50 | 23.26 | 38.99 | ||||||||||||
1989 | 23.77 | 26.39 | 30.97 | 36.43 | 39.29 | 45.17 | 58.35 | 56.39 | 48.90 | 37.68 | 27.77 | 20.77 | 37.66 | |||||||||||||
1990 | 24.90 | 25.68 | 32.29 | 38.32 | b | 39.55 | 49.97 | 62.42 | 57.00 | 54.57 | 37.28 | b | 28.37 | 18.23 | 39.05 | |||||||||||
1991 | 25.00 | 26.39 | 30.68 | 31.90 | 37.71 | 44.50 | 57.43 | a | 59.35 | 52.97 | 41.00 | 32.30 | 29.16 | 39.03 | ||||||||||||
1992 | 25.27 | a | 33.62 | 33.77 | 35.80 | 43.55 | 42.53 | 51.70 | a | 56.81 | 45.43 | 36.10 | 20.63 | 19.52 | b | 37.06 | ||||||||||
1993 | 29.29 | 31.43 | 32.81 | 34.50 | 43.10 | 45.17 | 51.87 | 56.38 | g | 46.00 | b | 40.94 | 27.80 | 22.26 | 36.83 | a | ||||||||||
1994 | 20.74 | 26.21 | 32.90 | 36.97 | a | 42.58 | 52.20 | 59.26 | 63.71 | 54.33 | 37.73 | a | 26.60 | 28.84 | 40.17 | |||||||||||
1995 | 32.39 | 33.79 | 34.43 | a | 35.60 | 40.03 | 47.07 | 56.90 | 63.10 | 54.73 | 36.33 | a | 32.63 | 22.26 | 40.77 | |||||||||||
1996 | 22.13 | 34.41 | b | 33.53 | a | 37.37 | 44.03 | 49.59 | a | 66.29 | 63.20 | f | 48.76 | m | 39.06 | 31.23 | 28.94 | 38.66 | b | |||||||
1997 | 30.90 | 26.82 | 31.13 | 37.00 | a | 47.55 | 48.47 | 56.55 | 64.45 | 59.55 | a | 42.50 | i | ----- | z | 26.33 | p | 44.71 | c | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.09 | 28.30 | 31.54 | 35.59 | 42.36 | 49.88 | 60.78 | 61.07 | 52.78 | 40.50 | 30.29 | 25.74 | 40.46 | |||||||||||||
S.D. | 3.69 | 4.26 | 2.86 | 3.15 | 2.81 | 4.37 | 3.68 | 3.36 | 3.64 | 3.35 | 3.04 | 3.26 | 1.92 | |||||||||||||
SKEW | 0.26 | 0.09 | -0.31 | 0.25 | 0.67 | 0.52 | -0.48 | -0.46 | -0.31 | 0.10 | -0.64 | -0.29 | 0.61 | |||||||||||||
MAX | 34.77 | 37.50 | 37.52 | 44.03 | 50.74 | 59.70 | 68.29 | 66.71 | 59.55 | 46.61 | 36.88 | 31.35 | 44.86 | |||||||||||||
MIN | 18.11 | 21.07 | 23.42 | 29.87 | 37.00 | 42.53 | 51.70 | 54.10 | 45.43 | 35.42 | 20.63 | 18.23 | 37.06 | |||||||||||||
YRS | 43 | 42 | 41 | 42 | 43 | 41 | 42 | 38 | 37 | 39 | 41 | 41 | 31 |