YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.55 | 47.52 | 40.67 | 30.29 | 20.27 | 15.90 | 33.37 | f | ||||||
1905 | 12.06 | 14.39 | ----- | z | 26.03 | 35.68 | 43.52 | a | 43.84 | 46.68 | 40.73 | 28.48 | 24.47 | 9.68 | 29.60 | a | ||||||||||
1906 | 14.23 | 14.32 | 18.00 | l | 30.13 | 36.26 | 40.20 | y | 50.58 | 44.00 | 38.37 | 27.28 | b | 19.13 | 25.03 | 29.93 | b | |||||||||
1907 | 21.13 | 22.61 | 26.94 | 27.47 | 30.48 | 39.10 | 45.00 | 47.39 | 38.37 | 30.87 | 17.41 | a | 17.52 | 30.36 | ||||||||||||
1908 | 10.29 | 15.70 | f | 22.71 | 27.80 | 32.58 | 38.67 | 45.80 | a | 47.03 | 36.13 | 26.68 | 16.57 | 14.39 | 28.97 | a | ||||||||||
1909 | 20.19 | 13.79 | 18.55 | 24.73 | 30.61 | 41.37 | 48.00 | 46.74 | 40.88 | m | 30.74 | 25.07 | 7.45 | 27.93 | a | |||||||||||
1910 | 15.04 | e | 10.75 | 25.19 | 30.57 | 40.29 | 44.57 | 49.84 | 43.60 | u | 40.80 | 32.39 | 32.70 | 13.65 | 30.53 | a | ||||||||||
1911 | 15.77 | i | 10.86 | 23.26 | 27.47 | 34.23 | 40.73 | 46.48 | 44.61 | 42.17 | 24.26 | 15.63 | 3.61 | 28.48 | a | |||||||||||
1912 | 11.19 | 9.38 | 13.74 | 22.80 | 34.29 | 40.37 | 45.81 | 46.06 | 32.63 | 21.00 | 14.33 | 5.29 | 24.74 | |||||||||||||
1913 | 5.58 | 7.57 | 14.45 | 22.43 | 29.90 | 42.80 | 45.00 | 46.00 | 37.30 | 24.48 | 22.17 | 2.13 | a | 24.99 | ||||||||||||
1914 | 18.79 | c | 13.43 | 16.26 | 24.27 | 36.29 | 43.37 | 46.81 | 45.18 | c | 38.30 | 26.42 | 21.94 | l | 3.78 | d | 28.44 | a | ||||||||
1915 | 6.80 | a | 13.68 | 15.68 | 29.37 | 33.06 | 41.13 | 46.29 | 44.65 | 38.50 | 27.47 | n | 15.63 | 11.09 | h | 28.48 | b | |||||||||
1916 | 13.31 | b | 17.29 | e | 18.76 | b | 27.62 | f | 31.40 | a | 34.80 | 46.45 | i | 46.48 | 36.43 | 28.80 | f | 10.44 | l | 4.48 | d | 25.37 | d | |||
1917 | 7.97 | 13.44 | c | 10.52 | 21.43 | b | 30.26 | 38.80 | 48.27 | a | 44.96 | e | 39.70 | 26.07 | a | 20.40 | 15.70 | a | 26.46 | |||||||
1918 | 3.72 | b | 7.94 | k | ----- | z | 22.23 | q | 30.22 | v | 44.67 | 47.67 | a | 44.90 | a | 38.62 | a | 30.48 | b | 13.72 | e | 6.41 | d | 28.77 | d | |
1919 | 6.55 | 4.85 | a | 17.00 | b | 27.90 | j | ----- | z | ----- | z | ----- | z | 42.16 | ----- | z | 29.23 | 13.20 | 8.74 | 17.39 | e | |||||
1920 | 8.06 | 18.59 | ----- | z | ----- | z | ----- | z | ----- | z | 44.77 | 47.10 | ----- | z | ----- | z | ----- | z | ----- | z | 29.63 | h | ||||
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 | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | 28.07 | 36.45 | 43.57 | 52.26 | 48.61 | 40.60 | 30.58 | 27.37 | 16.61 | 36.01 | c | |||||||||
1967 | 15.94 | 14.89 | 25.52 | 28.63 | 33.74 | 43.80 | 51.06 | 47.19 | 40.70 | 32.35 | 23.07 | 12.58 | 30.79 | |||||||||||||
1968 | 15.74 | 19.41 | 20.16 | 24.27 | 35.16 | 43.73 | 48.10 | 47.52 | 39.37 | 33.90 | 21.53 | 18.42 | 30.61 | |||||||||||||
1969 | 23.03 | 16.79 | 13.39 | 29.87 | 35.97 | 42.10 | 50.71 | 51.03 | 42.70 | 30.90 | 21.73 | 18.06 | 31.36 | |||||||||||||
1970 | 15.26 | 19.89 | 18.06 | 27.47 | 35.74 | 42.10 | 50.48 | 49.06 | 39.73 | 30.19 | 24.43 | 21.10 | 31.13 | |||||||||||||
1971 | 19.00 | 16.11 | 21.10 | 26.13 | 33.10 | 42.67 | 48.90 | 47.13 | 40.37 | 32.03 | 23.20 | 19.03 | 30.73 | |||||||||||||
1972 | 18.84 | 21.34 | 24.26 | 29.57 | 34.29 | 44.50 | 48.68 | 47.90 | 44.40 | 36.10 | 15.57 | 16.42 | 31.82 | |||||||||||||
1973 | 13.17 | b | 17.11 | 22.13 | 22.97 | 35.42 | 42.87 | 47.68 | 46.35 | 39.93 | 32.94 | 27.30 | 17.84 | 30.48 | ||||||||||||
1974 | 16.74 | 15.86 | 28.67 | j | 24.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.16 | i | |||
1975 | ----- | z | ----- | z | 19.76 | n | 24.72 | a | 32.61 | 41.17 | a | 47.34 | b | 46.45 | 38.63 | 28.59 | b | 17.27 | 17.54 | r | 34.60 | d | ||||
1976 | 11.61 | 21.90 | 23.06 | 30.43 | 35.19 | 43.50 | 49.32 | 47.23 | a | 43.17 | 29.23 | 17.70 | 16.13 | 30.71 | ||||||||||||
1977 | 12.29 | 17.54 | 20.90 | 29.67 | 37.13 | 44.77 | 48.19 | 50.13 | 43.93 | 32.38 | g | 26.03 | 24.17 | a | 32.25 | a | ||||||||||
1978 | 16.90 | 17.39 | 24.87 | 30.83 | 35.96 | g | 49.21 | f | 49.68 | c | 47.44 | d | 41.52 | a | 29.58 | l | 24.22 | c | 13.33 | a | 29.58 | c | ||||
1979 | 10.27 | a | 17.96 | 24.06 | 30.17 | 37.65 | 45.13 | 50.06 | 47.68 | 42.57 | ----- | z | ----- | z | ----- | z | 33.95 | c | ||||||||
1980 | ----- | z | ----- | z | 21.39 | 24.90 | a | 35.60 | a | 44.53 | 49.58 | g | 46.89 | c | 40.30 | j | 27.94 | 27.17 | r | 22.32 | l | 33.54 | f | |||
1981 | ----- | z | 17.85 | b | 22.20 | a | 30.42 | d | 36.07 | b | 47.40 | 50.16 | 47.48 | 41.97 | 34.55 | 27.10 | a | ----- | z | 35.52 | b | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.47 | 15.52 | 20.17 | 27.05 | 34.42 | 42.43 | 48.01 | 46.76 | 39.94 | 29.54 | 21.01 | 13.36 | 29.51 | |||||||||||||
S.D. | 5.06 | 4.26 | 4.36 | 2.89 | 2.50 | 2.58 | 2.19 | 1.75 | 2.55 | 3.44 | 5.00 | 6.47 | 2.55 | |||||||||||||
SKEW | -0.07 | -0.58 | -0.49 | -0.32 | -0.09 | -0.92 | -0.07 | -0.10 | -0.62 | -0.41 | 0.25 | -0.17 | -1.14 | |||||||||||||
MAX | 23.03 | 22.61 | 26.94 | 30.83 | 40.29 | 47.40 | 52.26 | 51.03 | 44.40 | 36.10 | 32.70 | 25.03 | 31.82 | |||||||||||||
MIN | 3.72 | 4.85 | 10.52 | 21.43 | 29.90 | 34.80 | 43.84 | 42.16 | 32.63 | 21.00 | 13.20 | 2.13 | 24.74 | |||||||||||||
YRS | 27 | 27 | 25 | 28 | 27 | 27 | 29 | 31 | 28 | 26 | 27 | 26 | 12 |