YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1898 | ----- | z | ----- | z | ----- | z | 34.90 | 41.61 | 50.57 | 52.97 | 53.61 | 42.00 | 30.45 | 17.60 | 10.33 | a | 37.12 | c | ||||||||
1899 | 9.35 | -3.86 | 11.52 | 30.77 | 40.16 | 48.03 | 54.10 | 49.45 | 42.20 | 32.00 | 23.43 | 9.97 | 28.93 | |||||||||||||
1900 | 14.23 | 9.04 | 23.35 | 35.93 | 42.68 | 50.63 | 51.61 | 51.68 | 42.17 | 32.42 | 15.93 | 21.03 | 32.56 | |||||||||||||
1901 | 8.29 | 7.00 | a | 23.78 | d | 32.03 | a | 46.74 | 46.07 | 57.32 | 53.19 | 40.67 | 34.87 | 24.20 | 16.50 | a | 32.56 | |||||||||
1902 | 11.45 | 15.57 | 23.00 | 29.53 | 43.90 | 46.03 | a | 51.00 | 49.74 | 37.80 | 32.10 | 21.60 | 9.87 | 30.97 | ||||||||||||
1903 | 17.06 | 8.46 | 18.55 | 31.40 | 40.00 | 50.57 | 54.19 | 54.19 | 42.57 | 33.19 | 18.17 | a | 19.06 | 32.29 | ||||||||||||
1904 | 15.45 | 6.86 | 17.16 | 34.07 | 40.32 | 47.40 | 52.84 | 50.26 | 41.70 | 33.39 | 23.60 | 15.74 | 31.57 | |||||||||||||
1905 | 8.68 | -0.25 | 28.81 | 31.17 | 39.03 | 47.57 | 54.00 | 53.03 | 43.53 | 29.45 | 22.93 | 13.74 | 30.97 | |||||||||||||
1906 | 12.26 | 15.86 | 13.45 | 33.27 | 41.53 | a | 47.80 | 51.58 | 52.58 | 43.56 | e | 32.65 | 18.17 | 13.13 | 31.32 | |||||||||||
1907 | -4.00 | 13.86 | 25.93 | a | 27.07 | 37.10 | 45.93 | 52.61 | 47.45 | 41.77 | 32.84 | 20.47 | 14.29 | 29.61 | ||||||||||||
1908 | 15.75 | k | 14.21 | j | 20.03 | 31.00 | 40.26 | 46.13 | 53.65 | 49.71 | 42.50 | 31.32 | 18.63 | 11.61 | 34.48 | b | ||||||||||
1909 | 2.19 | 12.25 | 21.39 | 25.63 | 36.03 | 49.30 | 52.97 | 52.19 | 43.73 | 29.68 | 19.83 | -0.06 | 28.76 | |||||||||||||
1910 | 6.35 | 0.36 | 28.84 | 31.11 | u | 38.37 | l | 46.18 | h | 52.13 | 43.26 | 41.07 | 32.48 | 22.03 | 11.03 | 26.39 | c | |||||||||
1911 | 1.97 | 2.32 | 23.29 | 28.17 | 32.75 | w | 49.00 | 47.10 | 47.69 | b | 42.08 | f | 28.58 | 12.30 | 11.16 | 25.16 | b | |||||||||
1912 | 2.06 | 18.45 | 7.23 | a | 31.93 | a | 40.23 | 48.03 | 52.97 | 49.87 | a | 38.21 | a | 30.80 | a | 25.59 | a | 20.58 | 30.50 | |||||||
1913 | 4.03 | 5.56 | a | 15.77 | 33.97 | 42.03 | 52.80 | 52.87 | 53.07 | q | 42.37 | 32.06 | 24.48 | c | 11.40 | a | 28.85 | a | ||||||||
1914 | 14.77 | 10.87 | e | 24.16 | 34.93 | a | 40.03 | 48.97 | 56.84 | 49.06 | 41.86 | a | 32.86 | i | 23.53 | 1.03 | b | 31.46 | a | |||||||
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 | 58.15 | k | 47.68 | 40.47 | 26.42 | g | 25.90 | 8.52 | 30.64 | h | ||||
1918 | 2.03 | 5.04 | 21.71 | 29.53 | 37.03 | 55.67 | 55.62 | e | 46.23 | 39.43 | 36.71 | 16.23 | 16.00 | 30.10 | ||||||||||||
1919 | 12.61 | 6.07 | 17.13 | 29.90 | 41.03 | 49.73 | 51.87 | 44.84 | 38.03 | 21.35 | 8.68 | b | -1.59 | b | 26.64 | |||||||||||
1920 | 3.55 | 13.14 | 16.72 | b | 25.90 | 41.13 | a | 49.33 | r | 66.74 | 52.37 | a | 40.18 | b | 29.65 | 14.77 | 9.81 | 28.54 | a | |||||||
1921 | 14.32 | 18.93 | 24.70 | a | 28.14 | a | 39.23 | 53.13 | 55.23 | 51.87 | 40.10 | 35.26 | 18.73 | 16.48 | 33.01 | |||||||||||
1922 | -0.68 | -7.89 | 19.27 | a | 31.25 | f | 39.52 | 50.87 | 51.23 | a | 49.48 | 38.83 | 31.39 | 22.97 | 0.45 | 26.86 | a | |||||||||
1923 | 17.42 | 4.61 | 20.35 | 33.37 | 39.03 | 49.36 | b | 60.00 | 51.87 | 41.50 | 33.06 | 24.97 | 10.35 | 32.16 | ||||||||||||
1924 | -0.87 | a | 19.59 | 20.23 | 35.80 | 37.87 | 49.66 | a | 51.35 | 48.35 | 35.30 | 32.23 | 21.43 | 2.35 | 29.44 | |||||||||||
1925 | 8.48 | 20.43 | 26.43 | a | 38.13 | 40.23 | 47.53 | 52.68 | 42.06 | 47.28 | e | 26.97 | a | 19.83 | 20.68 | 32.56 | ||||||||||
1926 | 16.55 | 23.50 | d | 21.48 | b | 31.30 | 42.34 | b | 42.77 | 54.35 | 48.90 | 37.37 | 34.13 | 20.93 | 8.74 | 31.86 | ||||||||||
1927 | 6.58 | 13.57 | 24.71 | 31.07 | 39.19 | 46.13 | 51.74 | 48.40 | a | 36.90 | 32.76 | b | 20.79 | b | -4.60 | a | 28.94 | |||||||||
1928 | 9.03 | a | 9.10 | 26.35 | 29.48 | a | 44.61 | 46.13 | 52.52 | 46.26 | 40.79 | f | 31.43 | a | 18.50 | 8.09 | h | 31.34 | b | |||||||
1929 | -5.16 | -0.64 | 24.45 | 28.44 | c | 41.18 | c | 46.03 | 55.45 | b | 51.37 | a | 40.47 | 30.55 | 17.83 | 9.10 | 28.26 | |||||||||
1930 | -7.87 | 22.93 | 20.45 | 36.38 | a | 40.58 | 44.47 | 55.26 | 55.73 | a | 38.90 | 30.31 | b | 18.87 | 12.16 | 30.68 | ||||||||||
1931 | 10.52 | 18.76 | g | 20.77 | 29.60 | 38.59 | d | 52.93 | 54.32 | 54.00 | 44.83 | 30.78 | d | 17.53 | 8.58 | 32.95 | a | |||||||||
1932 | 1.58 | 3.28 | 13.26 | 36.33 | 43.97 | 58.62 | q | 53.83 | a | 53.42 | 41.23 | 28.97 | 23.57 | 3.58 | 27.55 | a | ||||||||||
1933 | 8.16 | 2.54 | 23.84 | 30.20 | 41.30 | a | 49.80 | 55.84 | 51.13 | 41.97 | 32.94 | 24.37 | 12.13 | 31.18 | ||||||||||||
1934 | 17.65 | 21.11 | 25.00 | 33.17 | 44.13 | 49.27 | 55.84 | 52.87 | 41.47 | 37.10 | 27.40 | 16.68 | 35.14 | |||||||||||||
1935 | 6.07 | a | 21.54 | 20.26 | 29.03 | a | 38.71 | 45.93 | 55.45 | 48.53 | a | 42.87 | 29.23 | 19.97 | 18.00 | 31.30 | ||||||||||
1936 | 6.87 | a | -13.89 | a | 23.06 | 29.30 | 42.68 | 51.62 | a | 59.65 | 53.86 | c | 40.70 | 31.77 | 21.07 | 13.90 | a | 30.05 | ||||||||
1937 | -10.87 | 0.21 | 21.45 | 33.25 | f | 43.80 | a | 49.23 | 57.23 | 49.13 | 43.90 | 33.65 | 21.10 | 8.55 | 28.85 | a | ||||||||||
1938 | 14.58 | 7.26 | a | 24.30 | a | 29.97 | 37.10 | 48.13 | 53.39 | 48.48 | 43.03 | 34.13 | 14.17 | 13.74 | 30.69 | |||||||||||
1939 | 32.22 | h | 1.86 | 23.94 | 35.73 | 45.48 | f | 46.07 | 54.00 | 48.32 | 39.57 | 32.32 | 19.33 | 20.39 | 32.15 | b | ||||||||||
1940 | -0.84 | 13.38 | 28.26 | 31.30 | 40.23 | 48.77 | 55.35 | 50.90 | 46.70 | 35.58 | 11.57 | 13.81 | 31.25 | |||||||||||||
1941 | 10.06 | 12.32 | 20.81 | 27.77 | 40.87 | a | 49.10 | 53.29 | 53.19 | 38.73 | 28.13 | 19.53 | 12.65 | 30.54 | ||||||||||||
1942 | 3.68 | 6.46 | 21.52 | 31.20 | 37.39 | 43.97 | 51.26 | 47.32 | 40.60 | 30.53 | a | 18.53 | 12.68 | 28.76 | ||||||||||||
1943 | -0.33 | a | 13.89 | 7.13 | 32.60 | 35.81 | 45.43 | 48.61 | 48.58 | 35.33 | 29.77 | 19.33 | 8.52 | 27.06 | ||||||||||||
1944 | 7.71 | 5.59 | 14.90 | 28.40 | 39.29 | 43.10 | 47.20 | a | 45.32 | 35.87 | 25.45 | 16.27 | 2.55 | 25.97 | ||||||||||||
1945 | 4.45 | b | 8.96 | 21.48 | 28.33 | 38.26 | 44.27 | 51.30 | a | 49.87 | 39.70 | 32.10 | 20.37 | 6.32 | 28.78 | |||||||||||
1946 | 12.30 | a | 12.14 | 24.55 | 32.00 | 36.65 | 46.43 | 53.42 | 49.03 | 41.83 | 30.68 | 18.30 | 12.29 | 30.80 | ||||||||||||
1947 | 9.29 | 9.93 | 16.42 | 29.90 | 40.26 | 45.30 | 52.68 | 49.58 | 41.03 | 33.74 | 19.10 | 11.48 | 29.89 | |||||||||||||
1948 | 12.65 | 6.97 | 13.48 | 31.00 | 42.61 | 52.71 | b | 52.55 | i | 49.77 | 41.31 | a | 27.52 | 22.20 | 1.97 | a | 27.47 | a | ||||||||
1949 | -10.42 | -0.14 | 16.74 | 31.87 | 40.33 | a | 48.10 | 49.60 | a | 50.92 | e | 39.12 | e | 29.39 | c | 26.76 | a | 3.58 | 27.15 | |||||||
1950 | -14.06 | 10.75 | 16.06 | 28.50 | 35.61 | 46.30 | 50.97 | a | 45.43 | c | 40.29 | b | 31.65 | 17.13 | 15.34 | b | 27.00 | |||||||||
1951 | 2.86 | b | 13.21 | 10.61 | 26.26 | c | 42.23 | a | 42.70 | c | 53.15 | d | 52.04 | c | 38.17 | a | 32.00 | 17.89 | b | -1.24 | f | 30.10 | a | |||
1952 | -2.90 | b | 11.41 | 17.07 | a | 32.07 | a | 41.50 | c | 50.14 | a | 50.45 | b | 52.07 | a | 41.61 | b | 27.37 | a | 14.45 | a | 14.80 | a | 29.17 | ||
1953 | 20.83 | a | 22.31 | b | 22.46 | c | 26.93 | b | 36.97 | b | 48.29 | b | 54.32 | 51.03 | 39.67 | c | 32.24 | b | 24.24 | a | 17.89 | d | 33.10 | |||
1954 | -0.13 | 23.40 | c | 15.19 | 28.72 | a | 38.68 | c | 45.13 | 53.87 | a | 49.96 | c | 42.28 | a | 29.77 | a | 24.70 | 12.23 | 30.32 | ||||||
1955 | 11.37 | a | 7.61 | 12.86 | c | 29.00 | 41.43 | a | 49.50 | 54.73 | a | 51.79 | b | 39.27 | 30.72 | b | 11.10 | 7.67 | a | 28.92 | ||||||
1956 | 4.97 | 5.38 | 20.32 | 27.07 | 43.68 | 49.80 | 52.27 | a | 48.54 | c | 40.43 | 30.81 | 21.63 | 14.10 | a | 29.92 | ||||||||||
1957 | -5.90 | a | 10.29 | 22.34 | b | 31.00 | a | 43.07 | b | 48.83 | 54.87 | 53.77 | 41.57 | 31.27 | a | 22.93 | 19.48 | 31.13 | ||||||||
1958 | 14.00 | 13.93 | 22.29 | 31.33 | 43.84 | 47.93 | 50.48 | 51.60 | a | 40.57 | 29.40 | a | 21.33 | 12.03 | 31.56 | |||||||||||
1959 | 6.65 | 2.71 | 26.68 | 29.83 | a | 36.84 | 51.47 | 51.13 | 50.06 | 42.28 | a | 30.85 | r | 13.57 | 17.58 | 29.89 | a | |||||||||
1960 | 6.81 | 10.93 | 20.67 | a | 29.75 | b | 39.19 | 47.27 | 52.26 | 45.03 | 38.03 | a | 30.37 | a | 18.77 | 7.68 | 28.90 | |||||||||
1961 | 9.00 | 21.79 | 25.16 | 27.47 | 40.19 | 50.50 | 55.03 | a | 54.03 | b | 37.77 | 29.10 | a | 14.83 | 8.27 | a | 31.10 | |||||||||
1962 | 0.10 | a | 11.84 | c | 15.33 | a | 33.62 | a | 41.60 | a | 46.80 | 50.84 | 46.83 | a | 39.17 | a | 33.63 | a | 24.97 | a | 18.19 | 30.24 | ||||
1963 | -3.03 | 20.46 | 23.06 | 31.00 | 40.52 | b | 49.03 | 52.73 | a | 51.24 | f | 46.62 | d | 35.71 | c | 20.00 | l | 4.10 | a | 30.02 | b | |||||
1964 | 13.90 | 16.62 | 15.31 | b | 31.07 | 41.39 | 48.59 | a | 55.16 | 47.50 | a | 38.83 | 29.71 | ----- | z | 1.55 | 30.88 | a | ||||||||
1965 | 12.06 | 9.46 | 9.84 | 31.63 | 38.35 | 46.40 | 53.55 | 50.32 | 36.27 | 33.26 | 23.67 | 11.23 | 29.67 | |||||||||||||
1966 | 1.90 | 3.75 | 18.97 | 29.00 | 40.73 | a | 47.87 | 59.03 | 51.65 | 48.20 | 31.71 | 16.93 | 8.83 | a | 29.88 | |||||||||||
1967 | 15.03 | 18.43 | 20.71 | 29.60 | 38.35 | 47.97 | 54.27 | a | 50.61 | 46.00 | 35.10 | 20.90 | 8.55 | 32.13 | ||||||||||||
1968 | 0.03 | 16.72 | 27.06 | 28.47 | 37.90 | a | 48.70 | 52.00 | 50.84 | 42.50 | 31.16 | 22.37 | 4.10 | b | 30.15 | |||||||||||
1969 | -8.00 | 7.00 | 14.80 | a | 34.00 | 40.32 | 45.60 | 52.52 | b | 51.55 | 42.77 | 25.78 | h | 23.13 | 17.06 | 29.16 | a | |||||||||
1970 | 5.16 | 17.71 | 19.19 | 27.73 | 42.32 | 50.13 | 53.52 | 51.23 | 41.03 | 28.81 | 20.17 | 8.58 | 30.47 | |||||||||||||
1971 | 7.81 | 10.89 | 19.87 | 31.80 | 40.71 | 49.73 | 48.93 | a | 55.90 | a | 40.03 | 31.65 | 21.47 | 3.03 | a | 30.15 | ||||||||||
1972 | 0.90 | a | 12.45 | 26.35 | 30.40 | 41.39 | 50.47 | 49.77 | 54.16 | 39.17 | 30.00 | b | 23.60 | 4.26 | 30.24 | |||||||||||
1973 | 5.74 | 13.71 | 24.52 | 27.00 | 38.39 | 49.20 | 52.16 | 53.35 | 43.23 | 34.97 | 19.20 | 14.88 | e | 31.36 | ||||||||||||
1974 | 9.23 | 19.86 | 23.74 | 35.76 | a | 39.37 | a | 49.60 | 56.59 | b | 47.71 | 38.43 | 31.32 | c | 23.03 | 13.58 | 32.35 | |||||||||
1975 | 12.71 | 1.71 | 20.57 | a | 28.23 | 40.16 | 46.54 | b | 56.87 | 49.90 | b | 37.50 | 31.11 | c | 17.27 | 12.76 | b | 29.61 | ||||||||
1976 | 9.00 | 18.75 | a | 18.61 | 33.29 | b | ----- | z | 46.79 | b | 53.48 | d | 51.44 | f | 42.17 | a | 28.69 | e | 18.92 | d | 13.61 | 28.33 | b | |||
1977 | 4.11 | d | 20.20 | c | 21.96 | f | 30.56 | e | 41.64 | c | 51.81 | d | 55.00 | f | 50.45 | 42.39 | b | 32.45 | b | 17.59 | c | 7.48 | d | 29.87 | b | |
1978 | 0.00 | e | 3.92 | d | 16.97 | b | 36.71 | f | 42.37 | d | 47.73 | d | 52.04 | e | 48.21 | g | 42.27 | d | 30.04 | d | 12.76 | e | 1.68 | f | 27.57 | c |
1979 | -11.22 | d | 3.22 | a | 20.07 | b | 29.75 | f | 39.00 | e | 47.67 | c | 53.89 | d | 54.26 | d | 42.88 | d | 32.91 | h | 15.62 | d | 13.12 | f | 29.49 | c |
1980 | 3.03 | b | 15.58 | c | 17.96 | h | 33.25 | f | 38.71 | n | 49.68 | h | 51.79 | c | 46.48 | d | 37.05 | j | ----- | z | ----- | z | ----- | z | 29.22 | h |
1981 | 17.61 | m | 13.82 | f | 23.08 | g | 35.04 | g | 40.78 | h | 47.12 | e | 52.81 | d | 51.60 | f | 43.80 | e | 30.92 | f | 20.88 | f | 12.22 | h | 47.91 | i |
1982 | -5.80 | f | 5.72 | c | 20.59 | b | 28.31 | d | 38.97 | a | 47.39 | b | 53.69 | b | 53.25 | c | 41.00 | e | 31.40 | f | 15.60 | e | 11.48 | j | 33.83 | c |
1983 | 18.17 | m | 21.36 | c | 24.64 | f | 25.95 | i | 37.35 | e | 45.82 | m | 52.78 | d | 58.22 | d | 41.89 | c | 33.70 | k | 22.00 | i | -11.33 | d | 33.38 | f |
1984 | 16.50 | i | 19.41 | g | 25.39 | m | 30.95 | h | 39.64 | f | 46.79 | f | 54.12 | e | 55.52 | j | 38.62 | i | 27.79 | g | 19.12 | f | -3.84 | l | 54.12 | k |
1985 | -0.60 | f | 1.23 | f | 18.17 | g | 32.00 | d | 42.79 | g | 46.84 | e | 55.48 | 51.11 | c | 38.39 | b | 29.97 | a | 3.77 | d | 8.70 | k | 36.79 | e | |
1986 | 16.03 | a | 9.00 | a | 29.69 | b | 32.79 | a | 38.46 | c | 51.00 | 52.23 | 51.81 | 44.38 | a | 31.74 | 16.77 | d | 10.76 | b | 32.06 | |||||
1987 | 9.93 | a | 18.14 | 25.00 | c | 32.69 | a | 43.13 | 49.43 | 56.43 | a | 49.71 | 40.23 | 26.27 | a | 20.93 | a | 9.41 | b | 31.78 | ||||||
1988 | 0.13 | 12.62 | 24.68 | 31.16 | k | 42.94 | 53.97 | 51.87 | 48.87 | a | 39.10 | 31.35 | 23.03 | a | 10.14 | c | 30.79 | a | ||||||||
1989 | 4.86 | b | -2.75 | d | 16.10 | 32.83 | 38.86 | b | 47.60 | 57.58 | ----- | z | 27.25 | n | ----- | z | ----- | z | -3.38 | w | 27.87 | e | ||||
1990 | 12.81 | o | 6.07 | m | 20.83 | m | 26.85 | q | 35.00 | o | 46.58 | k | 50.25 | o | 47.07 | q | 36.57 | w | 21.15 | r | 9.06 | m | -8.10 | k | ----- | z |
1991 | -7.06 | o | 16.50 | n | 14.92 | r | 26.89 | c | 35.79 | c | 43.16 | e | 47.81 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.28 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 5.76 | 10.41 | 20.42 | 30.84 | 40.24 | 48.23 | 53.53 | 50.33 | 40.97 | 31.28 | 19.61 | 10.48 | 30.40 | |||||||||||||
S.D. | 7.54 | 7.73 | 4.91 | 2.75 | 2.31 | 2.56 | 2.81 | 2.91 | 2.58 | 2.56 | 4.20 | 6.14 | 1.74 | |||||||||||||
SKEW | -0.46 | -0.38 | -0.56 | 0.38 | 0.12 | 0.18 | 1.21 | -0.23 | 0.26 | -0.60 | -0.89 | -0.76 | -0.26 | |||||||||||||
MAX | 20.83 | 23.50 | 29.69 | 38.13 | 46.74 | 55.67 | 66.74 | 58.22 | 48.20 | 37.10 | 27.40 | 21.03 | 35.14 | |||||||||||||
MIN | -14.06 | -13.89 | 7.13 | 25.63 | 35.61 | 42.70 | 47.10 | 42.06 | 35.30 | 21.35 | 3.77 | -11.33 | 25.97 | |||||||||||||
YRS | 81 | 83 | 82 | 80 | 82 | 84 | 87 | 83 | 85 | 79 | 83 | 80 | 58 |