YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1898 | ----- | z | ----- | z | ----- | z | 50.43 | 53.82 | 64.58 | 69.44 | 70.31 | 58.72 | 43.29 | 30.75 | 22.79 | b | 51.57 | c | ||||||||
1899 | 20.90 | 9.27 | 24.42 | 44.18 | 53.32 | 62.32 | 69.23 | 66.34 | 60.35 | 44.69 | 39.32 | 23.18 | 43.13 | |||||||||||||
1900 | 26.73 | 22.00 | 36.37 | 50.23 | 60.10 | 70.08 | 70.00 | 67.58 | 56.78 | 47.87 | 30.43 | 32.16 | 47.53 | |||||||||||||
1901 | 22.02 | a | 21.17 | a | 38.44 | d | 48.40 | a | 62.24 | 60.32 | 74.34 | 70.85 | a | 54.83 | 51.52 | a | 39.93 | a | 28.40 | b | 47.70 | |||||
1902 | 23.97 | 27.84 | 34.71 | 45.27 | b | 59.26 | 62.67 | a | 68.94 | 67.19 | 56.20 | 48.23 | 33.65 | 21.30 | a | 45.77 | ||||||||||
1903 | 27.90 | 20.46 | a | 32.19 | 46.47 | 54.71 | 66.58 | 69.45 | 69.22 | a | 55.92 | 49.16 | 29.36 | a | 29.15 | 45.88 | ||||||||||
1904 | 25.85 | 18.67 | 28.53 | a | 48.82 | 55.68 | 63.32 | 69.88 | a | 68.53 | 59.75 | 50.02 | 39.97 | 27.60 | 46.38 | |||||||||||
1905 | 19.45 | 14.48 | 42.24 | 45.50 | 52.03 | 61.60 | 69.42 | 71.16 | 61.72 | 43.74 | 36.47 | 25.00 | 45.23 | |||||||||||||
1906 | 24.32 | 28.09 | 26.61 | 50.38 | a | 55.22 | a | 62.23 | 69.55 | 67.90 | 61.68 | e | 48.95 | 31.45 | 23.94 | 45.86 | ||||||||||
1907 | 7.98 | 26.07 | 39.78 | a | 42.55 | 50.65 | 60.80 | 68.55 | 65.50 | 57.03 | 50.23 | 37.03 | 27.53 | 44.48 | ||||||||||||
1908 | 30.88 | k | 28.05 | j | 34.39 | 48.53 | 54.26 | 61.18 | 71.85 | 66.16 | 60.28 | 44.66 | 35.42 | 23.85 | 50.06 | b | ||||||||||
1909 | 15.19 | 25.02 | 35.94 | 39.33 | 52.31 | 65.28 | a | 71.24 | 71.52 | 59.47 | 46.74 | 34.63 | 11.63 | 44.02 | ||||||||||||
1910 | 19.05 | 14.43 | 46.45 | 53.39 | u | 56.45 | l | 67.32 | h | 72.63 | 63.94 | 58.47 | 50.00 | 33.68 | 22.87 | 42.39 | c | |||||||||
1911 | 16.35 | 16.36 | 39.05 | 44.37 | 55.56 | w | 67.13 | 67.19 | 65.43 | b | 59.27 | f | 43.05 | 24.78 | 22.02 | 40.57 | b | |||||||||
1912 | 14.94 | 28.09 | 20.40 | a | 47.14 | b | 54.79 | 65.62 | 67.10 | 65.18 | a | 51.31 | a | 44.10 | a | 38.10 | a | 31.73 | 44.04 | |||||||
1913 | 17.50 | a | 18.35 | b | 26.97 | 50.28 | 55.97 | 67.13 | 69.03 | 70.86 | q | 59.19 | a | 45.57 | c | 39.16 | e | 25.98 | a | 43.19 | a | |||||
1914 | 29.31 | 24.13 | e | 37.95 | 49.03 | a | 56.65 | a | 64.57 | 73.31 | 67.42 | 58.86 | b | 49.82 | i | 40.84 | a | 14.97 | b | 47.00 | 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 | 77.29 | l | 67.68 | 59.63 | 42.65 | h | 42.98 | 21.55 | 47.96 | h | ||||
1918 | 15.21 | 20.21 | 37.65 | 47.34 | a | 55.50 | 73.07 | 72.31 | e | 68.03 | 58.63 | 54.31 | 29.60 | 30.84 | 46.89 | |||||||||||
1919 | 30.53 | 20.11 | 32.58 | 48.28 | 59.95 | 70.87 | 73.37 | 68.76 | 61.92 | 38.83 | b | 22.71 | b | 15.33 | e | 45.27 | ||||||||||
1920 | 18.27 | 25.19 | 30.22 | d | 37.03 | a | 56.75 | c | 60.54 | r | 79.00 | a | 70.58 | a | 60.98 | b | 48.52 | 30.80 | 24.68 | 43.82 | a | |||||
1921 | 30.97 | 34.14 | 39.62 | a | 43.10 | a | 49.76 | 71.18 | 74.12 | a | 71.81 | 59.83 | a | 54.24 | 32.10 | 26.10 | 48.91 | |||||||||
1922 | 12.21 | 9.30 | 31.73 | a | 46.54 | g | 52.43 | a | 68.77 | 70.47 | a | 72.66 | 63.08 | 52.40 | 37.22 | c | 16.32 | 44.24 | a | |||||||
1923 | 31.67 | a | 19.61 | 34.06 | 43.97 | 53.23 | 66.05 | b | 76.76 | 67.58 | a | 59.02 | 45.89 | 39.22 | 26.82 | 46.99 | ||||||||||
1924 | 13.90 | a | 30.64 | 30.47 | 48.28 | 53.85 | 64.22 | a | 69.47 | 67.39 | 57.33 | 52.77 | 35.82 | 14.63 | a | 44.90 | ||||||||||
1925 | 22.68 | 34.39 | 37.47 | a | 51.95 | 54.87 | d | 66.07 | 71.88 | a | 65.65 | 62.04 | e | 38.17 | a | 33.77 | 32.94 | 47.66 | ||||||||
1926 | 27.37 | 34.33 | e | 36.61 | c | 48.02 | 60.25 | c | 65.30 | 73.03 | b | 69.11 | 53.68 | 51.63 | 34.87 | 21.34 | 47.96 | |||||||||
1927 | 17.83 | a | 25.64 | 36.78 | a | 41.87 | 48.47 | a | 59.21 | d | 65.15 | 60.70 | a | 51.21 | a | 47.31 | b | 29.54 | b | 6.65 | d | 40.86 | ||||
1928 | 18.93 | a | 21.69 | 38.39 | 40.50 | a | 59.10 | a | 58.80 | 67.05 | 64.28 | a | 59.36 | h | 46.31 | b | 34.72 | a | 21.52 | h | 44.98 | b | ||||
1929 | 8.10 | 12.71 | 35.00 | 43.50 | c | 57.41 | c | 64.17 | a | 74.98 | b | 72.02 | a | 55.55 | 49.06 | 29.88 | 22.48 | 43.74 | ||||||||
1930 | 6.77 | 35.95 | 34.21 | 53.62 | a | 56.29 | 67.35 | 74.74 | 73.15 | a | 58.10 | a | 42.72 | b | 35.73 | 29.24 | 47.32 | |||||||||
1931 | 27.23 | 33.43 | g | 33.16 | 46.45 | 57.81 | d | 71.23 | 73.19 | 71.06 | 60.63 | 47.28 | d | 32.07 | 20.90 | a | 49.18 | a | ||||||||
1932 | 15.23 | 20.66 | 25.13 | 49.25 | 58.77 | 74.81 | q | 73.55 | b | 71.05 | 57.57 | 41.73 | 36.07 | 17.11 | 42.37 | a | ||||||||||
1933 | 21.08 | 17.05 | 37.00 | 41.77 | d | 54.93 | a | 72.71 | m | 76.65 | 69.40 | 60.05 | 50.11 | 38.80 | 24.40 | 44.66 | a | |||||||||
1934 | 29.85 | 34.54 | 39.31 | 50.27 | 65.24 | 67.63 | 75.55 | 71.69 | 56.77 | 51.50 | 39.05 | 27.52 | 50.74 | |||||||||||||
1935 | 15.50 | g | 35.59 | 34.10 | 44.00 | a | 53.31 | 62.83 | 76.08 | 68.45 | a | 60.73 | 45.82 | 31.18 | 30.31 | 49.31 | a | |||||||||
1936 | 18.87 | a | -1.73 | a | 34.50 | 44.02 | 62.40 | 69.26 | a | 79.81 | 72.29 | c | 59.28 | 48.66 | 34.33 | 25.45 | a | 45.59 | ||||||||
1937 | 2.87 | 15.46 | 33.71 | 50.65 | f | 61.73 | a | 64.35 | 75.65 | 71.32 | 63.15 | 52.47 | 34.21 | a | 22.31 | 45.20 | a | |||||||||
1938 | 27.31 | 22.26 | a | 37.27 | a | 46.05 | 52.71 | 65.37 | 70.69 | 67.95 | 64.28 | 52.15 | 29.37 | 29.35 | 47.06 | |||||||||||
1939 | 38.83 | h | 16.79 | 38.69 | 50.97 | 61.08 | g | 61.47 | 75.13 | 68.63 | 59.53 | 49.47 | 40.60 | 35.77 | 49.70 | b | ||||||||||
1940 | 14.26 | 27.03 | 40.84 | 44.50 | 59.08 | 67.15 | 74.44 | 72.52 | 65.27 | 52.89 | 26.60 | 28.29 | 47.74 | |||||||||||||
1941 | 25.68 | 31.39 | 36.33 | a | 44.33 | 59.55 | a | 65.88 | 72.45 | 70.94 | 54.85 | 45.32 | 35.37 | 25.61 | 47.31 | |||||||||||
1942 | 19.85 | 21.16 | 35.66 | 49.15 | 52.27 | 60.42 | 71.15 | 68.27 | 57.90 | 49.30 | a | 33.55 | 26.15 | 45.40 | ||||||||||||
1943 | 13.38 | a | 30.64 | 25.10 | 51.10 | 51.35 | 60.75 | 70.45 | a | 69.52 | 58.15 | 50.18 | 35.20 | 28.15 | 45.33 | |||||||||||
1944 | 26.63 | 22.43 | 29.02 | 45.67 | 57.39 | 58.57 | 66.55 | a | 65.63 | 57.23 | 48.77 | a | 32.81 | a | 21.23 | 44.33 | ||||||||||
1945 | 22.10 | b | 25.02 | 37.82 | 43.48 | 53.58 | 58.78 | 71.57 | a | 69.61 | 57.87 | 51.06 | 33.98 | 20.77 | 45.47 | |||||||||||
1946 | 27.42 | a | 27.57 | 41.55 | 52.03 | 53.50 | 63.52 | 73.00 | 68.11 | 58.26 | a | 43.27 | a | 31.17 | 25.47 | 47.07 | ||||||||||
1947 | 23.34 | 23.89 | 30.10 | 45.15 | 56.56 | 60.00 | 73.22 | a | 70.71 | 58.78 | 52.08 | 30.83 | 25.45 | 45.84 | ||||||||||||
1948 | 26.79 | 22.21 | 28.89 | 48.95 | 58.32 | 65.25 | b | 70.43 | i | 70.56 | 61.57 | a | 49.27 | 34.85 | 17.13 | a | 43.98 | a | ||||||||
1949 | 5.08 | 15.91 | 31.03 | 51.08 | 58.08 | a | 64.60 | 71.05 | a | 71.23 | e | 58.61 | h | 42.67 | d | 43.76 | a | 18.74 | 43.02 | a | ||||||
1950 | -0.35 | 25.79 | 30.19 | 43.92 | 51.74 | 61.80 | 67.90 | a | 65.64 | c | 56.29 | b | 50.23 | 30.65 | 28.05 | b | 42.65 | |||||||||
1951 | 15.55 | b | 27.09 | 24.11 | 42.76 | c | 57.25 | a | 57.85 | c | 71.13 | d | 68.45 | c | 54.24 | a | 45.10 | 33.14 | b | 11.36 | f | 45.15 | a | |||
1952 | 12.21 | b | 24.98 | 29.65 | a | 51.16 | b | 56.81 | d | 67.46 | b | 70.09 | b | 70.10 | b | 62.02 | d | 48.86 | b | 31.07 | a | 28.47 | b | 46.07 | ||
1953 | 33.48 | b | 34.10 | c | 38.04 | d | 40.33 | c | 51.41 | b | 63.73 | b | 73.06 | 70.42 | 60.09 | c | 51.48 | c | 40.10 | a | 31.72 | f | 50.57 | a | ||
1954 | 14.47 | 38.18 | c | 28.18 | 43.14 | a | 52.64 | f | 60.93 | 73.70 | a | 69.00 | d | 59.33 | a | 46.45 | a | 41.45 | 28.89 | 45.79 | a | |||||
1955 | 25.82 | a | 20.91 | 26.79 | c | 44.08 | 55.67 | a | 62.13 | 71.48 | a | 71.12 | b | 57.73 | 50.48 | b | 23.82 | 20.47 | b | 44.21 | ||||||
1956 | 18.61 | 22.07 | 35.45 | 42.68 | 57.08 | 69.02 | 70.52 | a | 67.18 | c | 60.50 | 50.55 | 35.40 | 29.55 | a | 46.55 | ||||||||||
1957 | 9.20 | a | 26.12 | 36.59 | b | 43.41 | b | 56.97 | b | 62.58 | 73.42 | 71.02 | 58.57 | 45.60 | a | 34.28 | 34.77 | 46.04 | ||||||||
1958 | 32.19 | 26.36 | 34.19 | 45.60 | 62.45 | 61.60 | 66.55 | 71.43 | a | 60.83 | 49.62 | b | 36.07 | 24.48 | 47.62 | |||||||||||
1959 | 19.03 | 18.46 | 39.98 | 45.84 | a | 51.65 | 67.80 | 71.39 | 69.82 | 58.59 | a | 44.50 | r | 27.28 | 30.81 | 45.51 | a | |||||||||
1960 | 20.95 | 22.74 | 34.93 | a | 45.44 | c | 56.68 | 65.53 | a | 74.63 | 66.45 | 60.05 | a | 49.41 | b | 34.40 | 24.05 | a | 46.27 | |||||||
1961 | 23.58 | 36.18 | 40.84 | 42.93 | 56.32 | 70.73 | 73.48 | a | 74.20 | c | 53.07 | 45.08 | a | 28.65 | 21.62 | a | 47.22 | |||||||||
1962 | 15.12 | a | 23.46 | c | 29.83 | a | 50.38 | a | 55.38 | b | 64.02 | 68.23 | 67.05 | a | 57.05 | b | 51.65 | a | 38.90 | a | 31.60 | 46.05 | ||||
1963 | 12.35 | 33.44 | a | 39.58 | 45.23 | 56.33 | b | 63.82 | 72.24 | b | 72.15 | g | 64.27 | d | 56.15 | e | 37.22 | l | 19.15 | a | 46.26 | b | ||||
1964 | 26.44 | 30.28 | 31.14 | b | 46.72 | a | 56.61 | 62.33 | a | 74.10 | 66.35 | a | 56.47 | 49.94 | ----- | z | 16.40 | 46.98 | a | |||||||
1965 | 26.85 | 24.96 | 23.13 | 46.40 | 53.29 | 63.00 | 71.56 | 68.44 | 48.93 | 53.44 | 37.97 | 26.24 | 45.35 | |||||||||||||
1966 | 14.55 | 20.14 | 35.90 | 43.00 | 59.82 | a | 64.28 | 76.98 | 69.35 | 65.48 | 48.92 | 31.95 | 22.58 | a | 46.08 | |||||||||||
1967 | 27.15 | 31.39 | 33.47 | 44.40 | 53.31 | 61.68 | 72.17 | a | 71.53 | 63.35 | 50.55 | 34.48 | 21.79 | 47.11 | ||||||||||||
1968 | 15.19 | 30.16 | 42.21 | 44.03 | 52.85 | a | 62.12 | 70.42 | 67.45 | 60.47 | 49.73 | 35.15 | 15.61 | c | 45.45 | |||||||||||
1969 | 4.65 | 20.50 | 28.53 | a | 51.02 | 57.39 | 60.82 | 70.32 | c | 72.16 | 62.67 | 38.83 | h | 38.42 | 29.11 | 45.05 | a | |||||||||
1970 | 18.15 | 30.80 | 30.44 | 40.27 | 57.05 | 66.28 | a | 72.31 | 72.69 | 57.75 | 45.15 | 32.97 | 22.34 | 45.51 | ||||||||||||
1971 | 18.66 | 23.95 | 34.10 | 46.28 | 55.98 | 65.88 | 68.97 | b | 76.38 | a | 57.78 | 46.23 | 35.20 | 17.85 | a | 45.61 | ||||||||||
1972 | 14.98 | b | 25.74 | 41.03 | 46.13 | 56.05 | 67.47 | 67.58 | 71.52 | 56.68 | 46.88 | b | 35.53 | 17.44 | 45.59 | |||||||||||
1973 | 19.52 | 28.64 | 39.84 | 41.67 | 55.06 | 65.87 | 70.44 | 71.56 | 58.00 | 51.94 | 31.45 | 26.35 | e | 46.69 | ||||||||||||
1974 | 23.72 | a | 34.14 | 37.85 | 50.52 | a | 53.00 | a | 66.87 | 74.48 | b | 65.58 | 57.33 | 51.00 | e | 37.28 | 28.26 | 48.34 | ||||||||
1975 | 24.81 | 16.30 | 32.88 | a | 40.03 | 53.39 | 61.78 | c | 73.69 | 67.78 | b | 59.03 | 48.13 | l | 32.47 | 25.73 | c | 44.35 | a | |||||||
1976 | 22.45 | 32.88 | a | 33.97 | a | 48.80 | b | ----- | z | 62.70 | c | 72.67 | e | ----- | z | 62.28 | c | 45.65 | h | 36.17 | f | 28.27 | 45.50 | d | ||
1977 | 19.12 | e | 34.96 | d | 38.33 | g | 51.86 | h | 58.81 | d | 69.44 | e | 73.50 | h | 66.90 | 60.00 | e | 49.91 | c | 32.22 | c | 18.67 | g | 48.92 | d | |
1978 | 11.85 | g | 17.16 | f | 32.70 | c | 50.32 | h | 54.98 | f | 64.56 | f | 69.31 | e | 68.40 | j | 60.81 | f | 49.88 | g | 26.38 | f | 15.97 | k | 51.00 | j |
1979 | 4.44 | e | 18.72 | a | 34.72 | b | 45.06 | f | 54.98 | h | 65.13 | c | 72.17 | e | 71.84 | f | 64.52 | d | 52.98 | k | 31.61 | h | 32.83 | h | 43.29 | f |
1980 | 18.14 | b | 29.40 | e | 34.70 | k | 52.60 | j | 56.94 | n | 65.81 | i | 70.98 | e | 64.22 | f | 54.53 | k | ----- | z | ----- | z | ----- | z | 39.50 | i |
1981 | ----- | z | 28.38 | h | 40.64 | i | 49.83 | j | 54.12 | j | 61.46 | e | 70.80 | d | 70.77 | g | 63.06 | e | 45.33 | h | 35.73 | h | 23.36 | i | 65.11 | i |
1982 | 9.41 | o | 19.31 | g | 32.11 | l | 42.53 | m | 52.17 | j | 60.58 | j | 69.75 | k | 71.90 | g | 57.69 | f | 48.22 | f | 30.02 | f | 24.05 | j | ----- | z |
1983 | 32.14 | m | 36.64 | c | 40.56 | g | 42.83 | i | 53.31 | e | 63.88 | m | 73.64 | f | 77.06 | d | 58.81 | d | 50.55 | k | 34.80 | j | 2.58 | e | 45.68 | g |
1984 | 28.19 | j | 33.14 | h | 38.00 | n | 43.00 | l | 53.93 | i | 63.61 | k | 72.83 | k | 74.37 | l | 56.48 | i | 45.25 | g | 34.60 | f | 12.28 | m | ----- | z |
1985 | 15.15 | g | 17.57 | f | 32.60 | g | 49.12 | d | 61.46 | g | 63.87 | g | 72.81 | 66.94 | d | 52.96 | b | 46.17 | a | 15.42 | e | 21.65 | k | 50.57 | f | |
1986 | 29.53 | a | 21.90 | b | 44.74 | b | 45.95 | a | 53.98 | c | 68.60 | 70.37 | 71.45 | 57.03 | a | 47.65 | 30.82 | e | 27.66 | c | 47.47 | |||||
1987 | 25.88 | a | 33.57 | 39.77 | c | 51.88 | a | 59.63 | 66.95 | 72.33 | a | 66.15 | 59.43 | 47.57 | a | 36.59 | a | 24.05 | c | 48.65 | ||||||
1988 | 16.38 | a | 27.71 | c | 37.42 | a | 47.97 | k | 59.48 | 74.48 | 73.84 | 69.77 | a | 58.20 | 51.21 | 36.41 | a | 24.30 | c | 48.11 | a | |||||
1989 | 20.71 | b | 12.81 | d | 28.15 | 46.97 | 55.33 | b | 64.70 | 76.45 | ----- | z | 48.23 | s | ----- | z | ----- | z | 14.25 | w | 43.59 | e | ||||
1990 | 27.97 | o | 21.57 | m | 35.06 | m | 46.04 | q | 50.97 | o | 64.50 | k | 70.56 | o | 71.11 | q | 63.86 | w | 41.15 | r | 31.21 | m | 11.62 | k | ----- | z |
1991 | 8.36 | q | 35.32 | n | 33.85 | r | 42.33 | f | 51.76 | d | 62.00 | f | 70.31 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.76 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.70 | 24.59 | 34.31 | 46.19 | 55.86 | 64.66 | 71.86 | 69.17 | 58.86 | 48.35 | 34.02 | 23.99 | 46.10 | |||||||||||||
S.D. | 7.47 | 7.44 | 5.24 | 3.55 | 3.24 | 3.53 | 2.86 | 2.79 | 3.15 | 3.53 | 4.71 | 5.92 | 1.69 | |||||||||||||
SKEW | -0.45 | -0.51 | -0.32 | -0.09 | 0.34 | 0.41 | 0.19 | 0.02 | -0.44 | -0.52 | -0.86 | -0.92 | -0.31 | |||||||||||||
MAX | 33.48 | 38.18 | 46.45 | 53.62 | 65.24 | 74.48 | 79.81 | 77.06 | 65.48 | 56.15 | 43.76 | 35.77 | 50.74 | |||||||||||||
MIN | -0.35 | -1.73 | 20.40 | 37.03 | 48.47 | 57.85 | 65.15 | 60.70 | 48.93 | 38.17 | 15.42 | 2.58 | 40.86 | |||||||||||||
YRS | 79 | 81 | 81 | 77 | 78 | 79 | 84 | 80 | 82 | 76 | 79 | 78 | 52 |