YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1898 | 20.18 | 32.41 | 35.08 | 49.70 | 52.32 | 63.60 | 72.45 | 70.56 | 60.38 | 48.66 | 35.50 | 22.42 | 46.94 | |||||||||||||
1899 | 24.60 | 28.11 | 40.00 | 48.85 | 54.02 | 63.48 | 70.48 | 66.98 | 63.10 | 47.94 | 42.73 | 27.53 | 48.15 | |||||||||||||
1900 | 32.26 | 32.89 | 44.61 | 47.33 | 58.50 | 68.48 | 74.58 | 66.90 | 59.12 | a | 51.79 | 39.22 | 31.06 | 50.56 | ||||||||||||
1901 | 28.68 | 36.20 | 38.18 | 48.28 | 58.42 | 63.82 | 74.40 | 70.71 | 60.37 | 52.56 | 42.30 | 30.32 | 50.35 | |||||||||||||
1902 | 31.29 | 36.26 | a | 36.48 | 50.38 | 56.84 | 67.00 | 68.11 | 69.24 | 60.98 | a | 51.92 | 38.07 | 27.18 | a | 49.48 | ||||||||||
1903 | 24.98 | b | 22.93 | a | 39.06 | 47.67 | 53.94 | 64.62 | a | 70.34 | 70.26 | b | 59.48 | a | 50.21 | 40.68 | 28.94 | n | 49.47 | a | ||||||
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | 25.22 | a | ----- | z | 41.60 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.41 | j |
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 | 47.64 | c | 41.72 | 28.67 | a | 39.34 | i | |
1911 | 30.76 | 31.34 | 41.32 | 48.10 | a | 56.81 | 65.02 | 67.84 | 69.16 | 62.77 | 47.45 | 33.47 | 22.88 | a | 48.08 | |||||||||||
1912 | 26.87 | 31.59 | a | 37.58 | 42.93 | 53.40 | 62.43 | 67.53 | 67.73 | t | 54.60 | 47.31 | 37.57 | 19.34 | 43.74 | a | ||||||||||
1913 | 18.97 | 28.64 | 34.98 | 47.90 | a | 58.13 | a | 63.88 | a | 69.47 | ----- | z | 58.22 | 46.15 | 40.90 | 22.77 | 44.55 | a | ||||||||
1914 | 27.16 | 27.65 | a | 39.53 | a | 48.69 | a | 56.35 | 63.40 | 68.32 | ----- | z | 62.00 | 49.92 | 41.08 | 23.81 | 46.17 | a | ||||||||
1915 | 22.85 | a | 31.46 | 37.94 | 50.33 | 52.31 | 60.72 | 69.34 | ----- | z | 60.00 | 50.94 | 36.93 | 29.31 | 45.65 | a | ||||||||||
1916 | 28.58 | a | 33.93 | 43.76 | b | 47.60 | 53.67 | a | 64.05 | b | 70.98 | 66.91 | b | 60.78 | a | 48.65 | 35.28 | a | 22.30 | a | 48.04 | |||||
1917 | 20.31 | 26.74 | a | 31.82 | a | 42.72 | 49.21 | 62.72 | 70.73 | 66.48 | c | 60.72 | 48.71 | 42.12 | a | 34.76 | h | 47.48 | a | |||||||
1918 | 22.66 | 30.20 | 41.33 | b | 44.42 | r | 53.66 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.96 | h | ||
1919 | ----- | z | ----- | z | ----- | z | 49.50 | a | 57.45 | 65.02 | 71.47 | 69.66 | 61.83 | 46.09 | b | 35.38 | b | 25.52 | a | 53.55 | c | |||||
1920 | 24.81 | 32.15 | c | 34.56 | 37.20 | c | 54.91 | b | 60.60 | d | 70.17 | a | 69.56 | 61.80 | ----- | z | ----- | z | 26.26 | 47.20 | b | |||||
1921 | 30.94 | 32.61 | 44.15 | a | 45.09 | c | 56.57 | a | 67.53 | ----- | z | ----- | z | 63.24 | c | 55.08 | ----- | z | ----- | z | 49.40 | d | ||||
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.69 | a | 51.22 | b | 36.89 | b | 30.87 | a | 45.92 | h |
1923 | 35.07 | d | ----- | z | ----- | z | ----- | z | ----- | z | 65.21 | f | 72.26 | 67.58 | a | 58.23 | 46.61 | 39.27 | 28.03 | 49.58 | e | |||||
1924 | 20.08 | 34.86 | 33.03 | 45.47 | 55.58 | 65.90 | 69.94 | 69.84 | ----- | z | 49.85 | a | 33.40 | 24.30 | a | 45.66 | a | |||||||||
1925 | 22.08 | a | 33.36 | 42.65 | 50.42 | 61.42 | 64.72 | 73.28 | a | 67.05 | 61.10 | 49.95 | 37.68 | 31.65 | 49.61 | |||||||||||
1926 | 26.27 | 36.55 | 40.31 | 50.29 | a | 56.73 | 67.25 | 70.08 | 71.89 | 63.03 | 52.52 | 39.75 | 28.11 | 50.23 | ||||||||||||
1927 | 31.73 | a | 35.41 | 36.55 | 47.92 | 56.75 | a | 64.00 | f | 70.82 | 65.84 | 60.52 | a | 52.82 | 42.83 | a | 25.50 | e | 47.88 | a | ||||||
1928 | 31.63 | a | 34.26 | 41.58 | 45.59 | a | 59.15 | a | 63.59 | a | 71.23 | 68.93 | a | 63.95 | 52.27 | 37.78 | a | 26.21 | 49.68 | |||||||
1929 | 23.21 | l | 23.70 | a | 36.84 | 44.32 | 54.75 | a | 64.83 | 72.21 | 70.44 | ----- | z | 52.65 | d | 33.20 | 31.63 | e | 48.46 | b | ||||||
1930 | 19.67 | a | 34.68 | 38.11 | 52.13 | 53.52 | 65.62 | a | 70.79 | 69.13 | 60.98 | 49.18 | 35.33 | 23.53 | 47.72 | |||||||||||
1931 | 26.50 | 36.11 | 37.23 | 49.12 | 54.89 | 67.53 | 73.81 | 70.23 | 65.05 | 52.44 | 35.10 | 23.73 | a | 49.31 | ||||||||||||
1932 | 20.66 | 33.88 | 36.47 | 47.25 | 56.24 | 62.68 | 70.79 | 68.23 | 61.30 | 49.05 | 38.93 | 22.47 | 47.33 | |||||||||||||
1933 | 24.32 | 20.50 | 39.19 | 43.20 | 51.21 | 67.83 | 72.45 | 68.65 | 64.31 | a | 54.81 | 39.53 | a | 33.92 | 48.33 | |||||||||||
1934 | 31.21 | 38.98 | 45.89 | 52.03 | 61.76 | 64.50 | 74.89 | 71.50 | 59.98 | 53.98 | 40.19 | a | 30.37 | 52.11 | ||||||||||||
1935 | 30.55 | 33.88 | 37.97 | a | 46.60 | 52.68 | a | 65.75 | 71.81 | 70.21 | 62.80 | 50.66 | 38.02 | 29.43 | a | 49.20 | ||||||||||
1936 | 28.35 | 31.93 | 41.06 | 49.92 | 60.35 | 69.07 | 72.63 | 70.31 | 60.88 | 50.02 | 36.53 | 29.60 | 50.05 | |||||||||||||
1937 | 17.21 | 29.43 | 38.55 | 45.87 | 58.32 | 63.63 | 70.03 | 69.69 | 62.28 | 50.87 | 39.78 | 30.13 | 47.98 | |||||||||||||
1938 | 28.19 | 32.77 | 38.23 | 47.62 | 52.88 | a | 63.83 | 67.47 | 68.76 | 61.07 | 50.84 | 30.72 | a | 27.40 | 47.48 | |||||||||||
1939 | 25.21 | 19.81 | b | 39.40 | 50.15 | 59.08 | 65.41 | a | 73.81 | 71.05 | 63.93 | 50.03 | 41.62 | 34.34 | 49.49 | |||||||||||
1940 | 26.34 | 33.36 | 42.42 | 47.91 | a | 60.50 | 69.08 | 74.13 | 70.55 | a | 63.32 | 50.97 | b | 35.58 | 29.80 | a | 50.33 | |||||||||
1941 | 27.37 | 34.77 | 39.58 | 44.28 | 57.47 | 62.59 | a | 70.26 | 69.67 | a | 58.40 | 49.32 | c | 37.63 | 32.85 | a | 48.68 | |||||||||
1942 | 25.58 | 26.72 | a | 33.95 | 48.52 | 54.71 | 65.67 | a | 73.13 | 70.79 | 62.23 | 51.98 | 41.63 | 33.84 | 49.06 | |||||||||||
1943 | 31.24 | 36.25 | 39.38 | a | 54.42 | 55.58 | 63.83 | 73.85 | 69.73 | 60.67 | 53.71 | 41.22 | 33.53 | 51.12 | ||||||||||||
1944 | 25.98 | 31.91 | a | 37.77 | 45.17 | 57.15 | 64.27 | 72.19 | 70.63 | 66.13 | 56.42 | 39.45 | 31.56 | 49.89 | ||||||||||||
1945 | 31.72 | a | 36.23 | b | 38.16 | 44.12 | 59.53 | 62.82 | 71.92 | 68.26 | 63.28 | 54.24 | 41.43 | 27.34 | 49.92 | |||||||||||
1946 | 27.00 | 36.41 | 51.33 | y | 60.60 | 57.21 | 70.17 | 73.98 | 72.26 | 62.57 | 46.81 | 34.48 | 34.23 | 52.34 | a | |||||||||||
1947 | 22.97 | 33.70 | a | 38.18 | 44.85 | 60.73 | a | 61.38 | 71.40 | 68.83 | b | 64.77 | 52.76 | 33.58 | 28.35 | 48.46 | ||||||||||
1948 | 24.66 | 28.67 | 33.05 | 48.17 | 57.89 | 63.12 | 69.26 | 67.47 | 63.43 | 49.47 | 31.05 | a | 30.61 | 47.24 | ||||||||||||
1949 | 21.42 | 25.41 | 39.61 | 48.97 | 55.13 | 62.20 | 70.69 | 68.29 | 62.50 | 47.19 | 42.95 | 29.44 | 47.82 | |||||||||||||
1950 | 28.08 | 34.29 | 37.74 | 49.12 | 54.06 | 64.37 | 68.50 | 66.98 | 60.57 | 57.03 | 41.00 | 34.26 | 49.67 | |||||||||||||
1951 | 27.95 | 32.29 | 37.79 | 47.58 | 56.74 | 62.57 | 72.44 | 68.79 | 61.67 | 49.34 | 33.03 | 26.19 | 48.03 | |||||||||||||
1952 | 27.94 | 28.36 | 33.47 | 48.38 | 56.85 | 66.68 | 70.53 | 69.03 | 62.58 | 53.19 | 33.28 | 26.47 | 48.06 | |||||||||||||
1953 | 32.42 | 31.38 | 39.95 | a | 45.50 | 51.44 | 66.73 | 72.68 | 67.47 | 63.67 | 51.00 | 40.18 | 25.89 | 49.02 | ||||||||||||
1954 | 32.75 | a | 37.91 | 37.11 | 53.09 | a | 60.06 | 65.30 | 73.32 | a | 68.90 | 62.72 | 52.50 | 41.95 | 28.45 | 51.17 | ||||||||||
1955 | 26.48 | 24.36 | 37.97 | 46.12 | 56.32 | 64.10 | 72.53 | 72.03 | 65.47 | 53.87 | 36.58 | 35.06 | 49.24 | |||||||||||||
1956 | 36.55 | 29.78 | 39.94 | 48.80 | 60.85 | 70.98 | a | 72.56 | 68.42 | 65.62 | 52.95 | 32.28 | 26.32 | 50.42 | ||||||||||||
1957 | 28.71 | 36.41 | 41.39 | 47.03 | 52.68 | 64.62 | a | 70.73 | 67.50 | 59.58 | 51.00 | 33.53 | 31.48 | 48.72 | ||||||||||||
1958 | 27.84 | 37.66 | 37.66 | 45.78 | 60.89 | 68.15 | 70.95 | 72.66 | 62.97 | 51.87 | 38.85 | 34.97 | 50.85 | |||||||||||||
1959 | 29.95 | 33.41 | 38.90 | 48.43 | 58.02 | a | 69.33 | 72.81 | 69.55 | 60.65 | 49.32 | a | 36.95 | 30.77 | 49.84 | |||||||||||
1960 | 25.48 | 26.98 | 41.48 | 48.98 | 56.16 | 67.32 | 72.21 | 70.35 | 64.12 | a | 50.23 | 39.87 | 27.35 | 49.21 | ||||||||||||
1961 | 26.87 | 33.71 | 39.87 | 46.55 | 57.84 | 69.03 | 71.82 | 70.63 | 56.71 | a | 49.55 | 35.65 | 23.66 | 48.49 | ||||||||||||
1962 | 22.58 | 35.00 | 35.21 | 50.07 | a | 55.56 | 64.32 | 69.27 | 69.37 | 62.43 | 52.18 | 41.75 | 30.02 | 48.98 | ||||||||||||
1963 | 18.00 | 35.95 | 38.27 | 47.38 | 60.50 | 64.22 | 72.74 | 69.23 | 64.73 | 56.34 | 41.05 | 27.95 | 49.70 | |||||||||||||
1964 | 24.15 | 26.79 | 33.45 | 45.10 | 55.89 | 63.02 | a | 72.58 | 66.56 | 60.42 | 53.97 | 36.12 | 29.73 | 47.31 | ||||||||||||
1965 | 31.97 | 31.50 | 35.50 | 47.00 | a | 53.65 | 61.53 | 69.32 | 66.95 | 56.77 | 51.77 | 41.70 | 33.18 | 48.40 | ||||||||||||
1966 | 25.63 | 28.36 | 41.68 | 47.42 | 59.18 | 65.18 | 72.92 | 69.71 | 62.97 | 50.05 | 41.97 | 28.50 | 49.46 | |||||||||||||
1967 | 27.53 | 33.79 | 44.79 | 47.28 | 55.27 | 62.68 | 72.08 | 69.87 | 62.64 | a | 52.31 | 39.40 | 22.60 | a | 49.19 | |||||||||||
1968 | 22.24 | 34.05 | 39.52 | 42.80 | 54.66 | 67.30 | 71.37 | a | 65.00 | 59.77 | 51.58 | 35.53 | 26.73 | 47.55 | ||||||||||||
1969 | 31.08 | 31.11 | 35.39 | 50.67 | 61.47 | 62.32 | 73.02 | 72.76 | 62.97 | 43.44 | 35.97 | 31.20 | a | 49.28 | ||||||||||||
1970 | 28.69 | 37.52 | 35.69 | 41.25 | 58.92 | a | 64.72 | 71.76 | 72.03 | 58.17 | a | 44.44 | 38.65 | 30.23 | 48.51 | |||||||||||
1971 | 28.15 | 30.82 | 37.95 | 46.03 | a | 53.77 | 67.07 | 72.16 | 71.26 | 58.40 | 48.74 | 35.75 | 25.60 | 47.98 | ||||||||||||
1972 | 29.29 | 35.03 | 45.03 | 49.33 | 57.34 | 67.58 | 72.82 | 70.61 | 61.47 | 49.74 | 32.12 | 24.06 | 49.54 | |||||||||||||
1973 | 20.03 | 29.66 | 37.95 | 43.50 | 55.63 | 63.43 | 70.16 | 69.58 | ----- | z | 50.48 | 40.18 | 27.90 | 46.23 | a | |||||||||||
1974 | 20.90 | 24.70 | 44.02 | 45.73 | 59.74 | 68.43 | 70.98 | 67.94 | 61.27 | 51.87 | 37.12 | 25.18 | 48.16 | |||||||||||||
1975 | 23.44 | 30.29 | 37.77 | 43.48 | 53.03 | 62.02 | 70.68 | 67.85 | 60.48 | 50.69 | 35.35 | 29.00 | 47.01 | |||||||||||||
1976 | 24.48 | a | 36.34 | ----- | z | 47.40 | 57.52 | 65.17 | 73.43 | a | 68.50 | 61.80 | 47.10 | 37.02 | 27.92 | 49.70 | a | |||||||||
1977 | 23.45 | 33.43 | 36.34 | 50.58 | 56.40 | 70.85 | 72.58 | 71.42 | 63.95 | 52.16 | 39.13 | 33.77 | 50.34 | |||||||||||||
1978 | 29.63 | 31.41 | 43.56 | 49.73 | 54.37 | 67.13 | 73.23 | 69.72 | a | 62.70 | 53.81 | 39.90 | 20.42 | a | 49.63 | |||||||||||
1979 | 19.71 | 28.34 | 37.94 | 47.62 | 55.31 | 64.55 | 71.37 | 68.00 | 65.53 | 53.68 | 32.62 | 29.31 | 47.83 | |||||||||||||
1980 | 30.18 | 36.28 | 36.77 | 47.67 | 53.15 | a | 69.08 | 73.84 | 70.37 | 63.14 | a | 50.06 | 39.43 | 38.15 | 50.68 | |||||||||||
1981 | 35.11 | 35.07 | 40.02 | 53.88 | 55.71 | 70.40 | 73.63 | 70.11 | 65.52 | 49.21 | 42.22 | 32.55 | a | 51.95 | ||||||||||||
1982 | 26.55 | b | 30.38 | 40.74 | b | 45.31 | d | 55.42 | a | 64.91 | a | ----- | z | 71.56 | d | 61.50 | b | 46.78 | b | 36.12 | a | 29.48 | c | 46.25 | a | |
1983 | 31.33 | b | 34.96 | b | 39.37 | 42.43 | a | 52.62 | b | 62.93 | 71.19 | 72.74 | 66.10 | a | 52.84 | b | 37.92 | d | 28.21 | b | 49.39 | |||||
1984 | 23.42 | 29.26 | d | 37.95 | b | 44.14 | a | 60.92 | a | 63.52 | c | 72.40 | 70.68 | 62.47 | a | 45.81 | e | 38.00 | a | 30.93 | c | 48.29 | ||||
1985 | 28.16 | c | 28.91 | a | 40.33 | a | 49.50 | 58.08 | a | 68.74 | a | 72.74 | 72.26 | 57.85 | c | 51.48 | b | 37.00 | 30.95 | 49.67 | ||||||
1986 | 33.88 | b | 37.56 | a | 44.89 | c | 48.62 | b | 55.90 | b | 68.55 | 70.33 | a | 70.82 | c | 58.33 | 48.80 | c | 37.94 | e | 30.55 | c | 50.52 | |||
1987 | 27.95 | b | 34.52 | a | 36.95 | a | 50.90 | 56.67 | b | 67.84 | a | 71.30 | a | 68.93 | b | 62.15 | 54.48 | 38.27 | 28.64 | f | 51.82 | a | ||||
1988 | 23.98 | a | 32.52 | a | 38.45 | b | 49.45 | 57.85 | a | 70.48 | 73.87 | 72.05 | 60.55 | 55.74 | 37.59 | a | 28.65 | 50.10 | ||||||||
1989 | 24.03 | a | 30.77 | 45.81 | 52.58 | 59.29 | 66.35 | 74.37 | a | 68.18 | 63.20 | b | 50.66 | 39.63 | 29.16 | 50.34 | ||||||||||
1990 | 29.65 | a | 34.54 | 44.00 | 50.53 | 56.27 | a | 70.25 | 72.23 | a | 69.82 | 65.58 | 50.89 | 37.78 | a | 22.17 | a | 50.31 | ||||||||
1991 | 21.94 | 33.29 | 37.15 | a | 43.58 | 56.53 | 66.75 | 71.32 | a | 70.16 | 61.11 | b | 52.23 | a | 35.20 | b | 25.53 | 47.90 | ||||||||
1992 | 22.97 | a | 34.02 | 41.85 | 53.00 | 57.98 | 63.33 | a | 67.76 | 67.90 | 62.30 | g | 53.79 | 30.98 | 25.73 | a | 47.21 | a | ||||||||
1993 | 30.11 | h | 31.96 | 40.53 | 45.62 | a | 54.77 | a | 62.66 | a | 67.89 | c | 66.13 | a | 59.42 | 47.07 | a | 31.38 | a | 26.26 | 48.52 | a | ||||
1994 | 27.81 | 29.70 | 42.76 | 48.28 | 58.37 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.38 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.59 | 31.99 | 39.05 | 47.71 | 56.45 | 65.41 | 71.55 | 69.42 | 61.79 | 50.79 | 37.73 | 28.41 | 49.15 | |||||||||||||
S.D. | 4.24 | 3.97 | 3.15 | 3.29 | 2.68 | 2.59 | 1.80 | 1.74 | 2.32 | 2.73 | 3.19 | 3.75 | 1.20 | |||||||||||||
SKEW | -0.03 | -0.84 | 0.16 | 0.32 | -0.06 | 0.39 | -0.44 | -0.18 | -0.40 | -0.17 | -0.34 | -0.05 | 0.18 | |||||||||||||
MAX | 36.55 | 38.98 | 45.89 | 60.60 | 61.76 | 70.98 | 74.89 | 72.76 | 66.13 | 57.03 | 42.95 | 38.15 | 52.11 | |||||||||||||
MIN | 17.21 | 19.81 | 31.82 | 37.20 | 49.21 | 60.60 | 67.47 | 65.00 | 54.60 | 43.44 | 30.72 | 19.34 | 46.94 | |||||||||||||
YRS | 87 | 87 | 86 | 87 | 88 | 85 | 85 | 82 | 84 | 88 | 87 | 85 | 67 |