YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1892 | 20.41 | h | 24.80 | b | 30.88 | a | 36.09 | b | 44.69 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.22 | 20.03 | b | 31.62 | f | ||
1893 | 27.09 | d | 20.63 | b | 28.90 | 34.25 | b | 44.26 | 57.38 | 64.21 | 60.81 | 52.80 | 42.68 | 30.48 | d | 26.53 | b | 40.84 | ||||||||
1894 | ----- | z | 16.23 | 30.30 | c | 39.46 | d | 50.19 | 55.75 | 63.24 | 62.27 | 52.03 | 45.50 | b | 36.33 | 22.35 | e | 43.06 | a | |||||||
1895 | ----- | z | 18.15 | b | 28.59 | d | 40.65 | c | 45.43 | b | 52.22 | 58.94 | 61.08 | 54.65 | 41.10 | 26.58 | d | 14.37 | d | 40.16 | a | |||||
1896 | 28.76 | b | 22.91 | 26.03 | a | 37.35 | 47.80 | a | 59.12 | 62.34 | 62.05 | 53.03 | 41.92 | g | 28.69 | d | 31.47 | a | 41.78 | a | ||||||
1897 | 17.06 | d | 19.36 | 24.12 | b | 35.10 | 50.90 | 55.67 | 60.69 | 60.35 | 56.88 | 42.35 | 35.88 | f | 12.19 | g | 42.25 | b | ||||||||
1898 | 17.11 | 25.98 | a | 27.87 | d | 40.42 | 42.63 | l | 56.42 | 64.94 | 63.11 | 51.97 | 38.29 | b | 24.34 | b | 14.09 | d | 38.59 | a | ||||||
1899 | 20.50 | b | 11.52 | d | 25.02 | d | 38.30 | 44.84 | 55.08 | 62.13 | 60.73 | 55.08 | l | 38.29 | 35.60 | 17.60 | b | 37.24 | a | |||||||
1900 | 25.50 | 19.83 | b | 32.18 | 35.89 | b | 50.84 | 61.50 | 62.77 | 62.44 | 52.07 | 45.98 | c | 38.55 | a | 25.91 | c | 42.79 | ||||||||
1901 | 19.17 | b | 17.84 | i | 25.85 | k | 36.48 | g | 49.81 | 54.14 | a | 67.81 | 62.65 | a | 52.30 | b | 44.22 | d | 35.78 | g | 19.74 | n | 50.01 | e | ||
1902 | 21.32 | f | 29.31 | j | 27.46 | h | 38.80 | h | 49.25 | a | 58.05 | ----- | z | 62.23 | 52.54 | e | 43.62 | g | 32.84 | k | ----- | z | 55.52 | h | ||
1903 | 22.89 | i | 11.41 | k | 32.29 | l | 37.71 | k | 44.62 | b | 54.34 | a | 63.30 | a | 63.47 | 52.07 | g | 42.78 | h | 34.83 | g | 26.27 | i | 56.43 | h | |
1904 | 19.66 | f | 27.65 | l | 31.55 | k | 39.08 | 47.00 | a | 53.98 | 60.72 | b | 61.26 | 54.48 | c | 42.89 | d | 35.28 | e | 26.96 | h | 49.34 | d | |||
1905 | 22.53 | 16.46 | b | 34.88 | a | 36.14 | a | 44.66 | b | 58.32 | 61.28 | a | 62.97 | 54.97 | 37.61 | c | 33.28 | a | 20.77 | c | 40.32 | |||||
1906 | 24.16 | c | 27.50 | 24.74 | 39.80 | 47.40 | 55.08 | 60.42 | 61.63 | 53.58 | 40.31 | 29.07 | 30.45 | 41.18 | ||||||||||||
1907 | 24.69 | 32.95 | 36.13 | 37.10 | 42.03 | 53.45 | 62.61 | 61.47 | 53.77 | 44.31 | 30.31 | a | 23.44 | 41.85 | ||||||||||||
1908 | 22.83 | a | 24.43 | 33.78 | a | 41.82 | 44.58 | 54.40 | 61.39 | 60.15 | a | 54.82 | 39.58 | 25.50 | 23.35 | 40.55 | ||||||||||
1909 | 28.10 | 23.23 | 28.76 | 32.90 | 43.21 | 57.25 | 64.94 | 64.21 | 54.34 | a | 44.77 | 35.69 | a | 14.27 | 40.97 | |||||||||||
1910 | 23.92 | 21.30 | 39.87 | 42.74 | a | 47.95 | b | 60.12 | a | 64.27 | a | 62.87 | a | 55.88 | a | 45.23 | e | 38.68 | e | 24.93 | j | 45.71 | a | |||
1911 | 25.35 | d | 23.00 | c | 36.06 | d | 39.11 | b | 49.05 | c | 59.53 | 61.32 | a | 61.02 | a | 55.54 | b | 40.22 | d | 29.02 | g | 18.90 | e | 42.65 | a | |
1912 | 23.38 | f | 22.00 | c | 24.81 | b | 36.33 | 45.35 | 55.10 | 62.53 | a | 60.85 | 46.83 | d | 41.48 | d | 31.31 | c | ----- | z | 42.66 | b | ||||
1913 | 20.44 | d | 14.70 | e | 28.73 | c | ----- | z | 49.57 | a | 58.38 | a | 61.57 | a | 63.26 | 50.97 | a | 41.41 | b | 36.10 | a | 9.82 | 39.54 | a | ||
1914 | 23.53 | 21.96 | 30.47 | 39.86 | a | 49.72 | a | 57.50 | 63.52 | 61.83 | a | 56.57 | 44.90 | 38.05 | 16.58 | 42.04 | ||||||||||
1915 | 20.27 | 27.73 | 26.21 | b | 42.52 | 42.71 | 51.70 | 59.45 | 57.35 | 50.65 | 43.27 | 31.70 | 22.55 | 39.68 | ||||||||||||
1916 | 17.13 | d | 27.57 | 35.44 | 39.95 | b | 46.35 | 57.07 | 65.69 | 60.87 | 53.98 | 44.05 | 26.10 | 17.19 | 40.95 | |||||||||||
1917 | 17.34 | 23.82 | 21.94 | 33.10 | 41.00 | a | 55.07 | 65.56 | 59.48 | 55.58 | 41.35 | 37.42 | 31.84 | 40.29 | ||||||||||||
1918 | 18.06 | 26.41 | 36.92 | 35.14 | a | 48.11 | 63.87 | d | 64.26 | 62.26 | 52.90 | 45.27 | a | 25.15 | 22.26 | 41.72 | ||||||||||
1919 | 25.71 | 22.50 | 30.29 | 40.12 | 50.10 | 59.45 | 67.66 | 64.87 | a | 57.25 | 38.39 | 28.27 | 24.94 | 42.46 | ||||||||||||
1920 | 27.55 | 25.64 | 29.71 | b | 29.92 | 47.97 | 56.72 | 63.47 | 59.73 | 52.85 | 42.05 | 28.84 | b | 22.32 | 40.56 | |||||||||||
1921 | 25.34 | 26.50 | 35.84 | 36.12 | 49.00 | 59.14 | a | 64.00 | 62.29 | 55.45 | 48.45 | a | 37.00 | b | 28.53 | 43.97 | ||||||||||
1922 | 19.07 | a | 20.91 | 30.39 | 36.18 | 47.69 | 60.68 | 63.65 | 65.31 | 57.07 | 44.45 | b | 28.33 | 27.24 | 41.75 | |||||||||||
1923 | 27.92 | 21.05 | 24.66 | 37.97 | 47.42 | 56.25 | 64.77 | 61.50 | 52.35 | 36.19 | 31.85 | 22.85 | 40.40 | |||||||||||||
1924 | 19.66 | 28.36 | 21.58 | 37.79 | a | 44.60 | 58.63 | 62.89 | 63.23 | 52.70 | 43.98 | 33.43 | 20.69 | 40.63 | ||||||||||||
1925 | 21.81 | 30.79 | 34.26 | 42.13 | 50.53 | 56.17 | 64.03 | 59.79 | 53.92 | 37.77 | 30.55 | 22.53 | 42.02 | |||||||||||||
1926 | 18.47 | 27.70 | 28.63 | 40.22 | 49.18 | 56.63 | 60.71 | 61.87 | 53.22 | 44.92 | 33.17 | 20.48 | 41.27 | |||||||||||||
1927 | 25.53 | 26.77 | 28.94 | 38.13 | 48.13 | 56.22 | 63.03 | 59.16 | 52.97 | 44.89 | 36.98 | 18.00 | 41.56 | |||||||||||||
1928 | 27.18 | 23.19 | 31.31 | 34.82 | 50.00 | 52.73 | 62.66 | 61.11 | 54.13 | 45.05 | 31.90 | 21.90 | 41.33 | |||||||||||||
1929 | 20.74 | 15.64 | 27.10 | 35.60 | 45.65 | 57.27 | 64.98 | 64.16 | 51.20 | 42.97 | 21.32 | 27.94 | 39.55 | |||||||||||||
1930 | 11.63 | 31.29 | 26.53 | b | 45.42 | 44.92 | 57.28 | 65.06 | 62.45 | 53.09 | a | 41.73 | 30.60 | 20.08 | 40.84 | |||||||||||
1931 | 24.02 | 29.29 | 26.66 | 38.50 | 45.68 | 61.25 | 66.52 | 62.16 | 56.77 | 44.34 | 28.15 | 23.19 | 42.21 | |||||||||||||
1932 | 15.40 | 27.17 | 21.37 | 38.85 | 49.21 | 56.32 | 65.97 | 64.32 | 54.52 | a | 40.94 | 33.60 | 13.76 | 40.12 | ||||||||||||
1933 | 24.32 | 16.88 | 31.94 | 35.42 | 46.08 | 62.75 | 67.58 | 61.89 | 58.63 | 49.15 | 36.68 | 34.34 | 43.80 | |||||||||||||
1934 | 27.89 | 30.80 | 36.35 | 42.65 | 56.10 | 58.88 | 67.13 | 64.40 | 51.62 | 48.95 | 34.02 | 24.58 | 45.28 | |||||||||||||
1935 | 29.61 | 29.00 | 30.94 | 37.77 | 42.45 | 57.60 | 65.71 | 64.10 | 55.22 | 42.58 | 31.75 | 24.85 | 42.63 | |||||||||||||
1936 | 20.95 | 21.41 | 31.60 | 40.45 | 52.71 | 61.85 | 67.21 | 64.39 | 53.70 | 41.32 | 32.42 | 27.55 | 42.96 | |||||||||||||
1937 | 13.03 | 23.80 | 28.52 | a | 37.17 | 49.62 | a | 56.63 | 64.63 | 66.05 | 56.72 | 46.00 | 33.00 | 25.81 | 41.75 | |||||||||||
1938 | 23.68 | 27.16 | 32.95 | 40.40 | 47.32 | 59.34 | a | 63.40 | 64.74 | 56.43 | 46.87 | 27.25 | 25.37 | 42.91 | ||||||||||||
1939 | 24.61 | 16.09 | 32.87 | 41.87 | 51.69 | 57.50 | 66.68 | 63.37 | 57.28 | a | 45.06 | 36.10 | 32.85 | 43.83 | ||||||||||||
1940 | 18.66 | 26.91 | 34.61 | 39.87 | 51.05 | 61.17 | 67.08 | 63.13 | 57.45 | 47.89 | 28.37 | 29.31 | 43.79 | |||||||||||||
1941 | 26.44 | 29.50 | 30.42 | 36.83 | 51.90 | 56.38 | 64.21 | 62.06 | 51.80 | 42.65 | 34.52 | a | 28.05 | 42.90 | ||||||||||||
1942 | 19.31 | 17.95 | 27.11 | 41.42 | 46.02 | 56.12 | 65.03 | 63.68 | 52.52 | 43.03 | 34.10 | 28.58 | 41.24 | |||||||||||||
1943 | 25.06 | 30.30 | 27.18 | 45.42 | 45.94 | 56.75 | 66.23 | 65.27 | 55.28 | 44.65 | 32.67 | 25.06 | 43.32 | |||||||||||||
1944 | 20.89 | 22.72 | 26.82 | 35.40 | 48.61 | 56.45 | 62.65 | 64.15 | 53.98 | 46.31 | 32.62 | 22.98 | 41.13 | |||||||||||||
1945 | 22.76 | 24.59 | 30.26 | 31.78 | 48.50 | 52.63 | 64.84 | 63.45 | 50.97 | 47.42 | 34.48 | 21.94 | 41.13 | |||||||||||||
1946 | 23.35 | 27.09 | 35.39 | 46.24 | a | 43.82 | a | 59.53 | 66.45 | 63.82 | 54.90 | 41.08 | 30.67 | 31.42 | 43.65 | |||||||||||
1947 | 22.58 | 24.11 | 29.08 | 37.42 | 49.47 | 53.30 | 64.97 | 64.47 | 57.03 | 47.87 | 25.35 | 24.87 | a | 41.71 | ||||||||||||
1948 | 18.67 | a | 21.26 | 25.56 | 41.77 | 51.03 | 59.27 | 64.87 | 65.50 | 58.30 | 43.63 | 26.78 | 23.45 | 41.67 | ||||||||||||
1949 | 11.00 | 21.34 | 31.63 | 42.18 | 49.02 | 57.63 | 64.52 | 63.69 | 55.38 | 41.56 | 41.43 | 25.39 | 42.06 | |||||||||||||
1950 | 23.18 | 31.04 | 29.68 | 39.02 | 44.13 | 57.88 | 61.32 | 60.39 | 52.40 | 51.45 | 34.07 | 31.00 | 42.96 | |||||||||||||
1951 | 21.06 | 27.77 | 27.98 | 36.47 | 49.13 | 52.15 | 65.74 | 62.24 | 53.37 | 41.50 | 29.08 | 23.05 | 40.80 | |||||||||||||
1952 | 23.61 | 24.60 | 25.42 | 40.32 | 49.42 | 62.23 | 64.79 | 63.29 | 56.72 | 47.40 | 25.72 | 25.31 | 42.40 | |||||||||||||
1953 | 30.92 | 23.39 | 35.08 | 35.50 | 44.77 | 60.70 | 67.23 | 63.77 | 57.80 | 46.15 | 36.65 | 23.40 | 43.78 | |||||||||||||
1954 | 30.13 | 34.32 | 26.84 | 44.52 | 49.52 | 59.43 | 69.13 | 64.21 | 58.48 | 45.73 | 37.12 | 28.34 | 45.65 | |||||||||||||
1955 | 22.69 | 20.52 | 27.73 | 40.75 | 49.97 | 55.70 | 66.79 | 65.98 | 56.88 | 46.00 | 29.62 | 29.31 | 42.66 | |||||||||||||
1956 | 27.42 | 17.41 | 30.61 | 39.00 | 52.34 | 63.73 | 64.10 | 61.92 | 58.00 | 47.31 | 27.52 | 26.53 | 42.99 | |||||||||||||
1957 | 20.71 | 33.27 | 30.81 | 36.55 | 46.10 | 57.73 | 65.71 | 64.77 | 53.23 | 45.18 | 27.67 | 30.31 | 42.67 | |||||||||||||
1958 | 24.16 | 32.59 | 24.85 | 35.87 | 53.61 | 60.08 | 63.05 | 65.06 | 56.15 | 46.65 | 34.47 | 28.90 | 43.79 | |||||||||||||
1959 | 24.48 | 25.38 | 29.21 | 38.12 | 47.21 | 61.93 | 64.55 | 64.08 | 52.47 | 41.26 | 31.40 | a | 29.18 | 42.44 | ||||||||||||
1960 | 22.44 | 17.62 | 32.73 | 42.00 | 49.68 | a | 59.95 | 65.21 | 63.31 | 57.03 | 44.98 | 33.45 | 20.97 | 42.45 | ||||||||||||
1961 | 25.02 | 27.93 | 30.89 | 37.10 | 49.71 | 59.92 | 64.32 | 64.24 | 48.37 | 43.03 | 28.88 | 21.94 | 41.78 | |||||||||||||
1962 | 14.60 | 25.46 | 24.90 | 42.23 | 50.75 | a | 56.53 | 62.06 | 62.34 | 54.72 | 46.68 | 35.80 | 26.58 | 41.89 | ||||||||||||
1963 | 14.02 | 28.62 | 29.82 | 39.12 | 50.73 | 58.82 | 66.57 | a | 62.89 | 58.60 | 49.97 | 36.25 | 24.40 | 43.32 | ||||||||||||
1964 | 19.15 | 16.71 | 22.29 | 35.30 | 49.16 | 54.95 | 67.77 | 60.40 | 53.38 | 45.03 | 30.95 | 22.44 | 39.79 | |||||||||||||
1965 | 26.40 | 21.89 | 19.53 | 40.17 | 45.97 | 55.75 | 63.87 | 60.21 | 47.62 | 48.73 | 38.22 | 28.69 | 41.42 | |||||||||||||
1966 | 23.34 | 21.66 | 34.13 | 37.73 | 51.79 | 58.68 | 69.31 | 62.73 | 56.52 | 42.89 | 36.05 | 25.69 | 43.38 | |||||||||||||
1967 | 26.02 | 25.96 | 35.73 | 40.42 | 46.84 | 55.40 | 65.02 | 62.66 | 54.75 | 46.05 | 32.07 | 18.34 | 42.44 | |||||||||||||
1968 | 24.32 | 27.02 | 33.69 | 33.58 | 45.81 | 59.52 | 64.61 | 60.97 | 53.05 | 47.35 | 29.73 | 23.35 | 41.92 | |||||||||||||
1969 | 29.95 | 25.84 | 22.73 | 43.85 | 53.23 | 53.85 | 67.34 | 67.05 | 58.77 | 34.68 | 32.03 | 26.65 | 43.00 | |||||||||||||
1970 | 25.02 | 30.96 | 26.31 | 35.42 | 51.23 | 58.43 | 66.55 | 66.87 | 52.30 | 37.60 | 32.12 | 26.76 | 42.46 | |||||||||||||
1971 | 26.68 | 23.54 | 29.92 | a | 39.25 | 47.11 | 61.32 | 64.19 | 65.39 | 51.52 | 42.53 | 32.18 | 24.21 | 42.32 | ||||||||||||
1972 | 23.89 | 28.53 | 37.08 | 41.17 | 49.10 | 60.98 | 63.61 | 62.69 | 54.52 | 43.42 | 25.32 | 19.97 | a | 42.52 | ||||||||||||
1973 | ----- | z | 21.54 | 27.73 | 33.37 | 48.07 | a | 59.47 | 63.18 | a | 65.08 | 53.33 | 46.98 | a | 31.60 | 25.00 | c | 43.21 | a | |||||||
1974 | 19.56 | 25.93 | 35.13 | 39.12 | a | 50.94 | e | 60.82 | 66.55 | 61.55 | a | 52.82 | b | 47.46 | e | 37.50 | j | 24.63 | 44.05 | a | ||||||
1975 | 21.52 | a | 23.59 | 28.71 | 35.07 | b | 45.38 | k | 51.90 | i | 66.19 | b | 63.85 | 52.38 | b | 46.60 | b | 34.24 | e | 27.75 | g | 41.35 | c | |||
1976 | 24.63 | 33.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.03 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.61 | 24.40 | 29.66 | 38.50 | 48.04 | 57.62 | 64.41 | 62.78 | 54.23 | 43.87 | 32.00 | 24.07 | 42.07 | |||||||||||||
S.D. | 4.32 | 4.89 | 4.28 | 3.25 | 2.92 | 2.79 | 2.18 | 1.85 | 2.49 | 3.31 | 4.04 | 4.81 | 1.28 | |||||||||||||
SKEW | -0.53 | -0.21 | -0.01 | 0.03 | -0.07 | 0.01 | -0.17 | -0.13 | -0.32 | -0.40 | -0.20 | -0.45 | 0.30 | |||||||||||||
MAX | 30.92 | 34.32 | 39.87 | 46.24 | 56.10 | 63.87 | 69.31 | 67.05 | 58.77 | 51.45 | 41.43 | 34.34 | 45.65 | |||||||||||||
MIN | 11.00 | 11.52 | 19.53 | 29.92 | 41.00 | 51.70 | 58.94 | 57.35 | 46.83 | 34.68 | 21.32 | 9.82 | 39.55 | |||||||||||||
YRS | 77 | 81 | 80 | 80 | 82 | 82 | 82 | 83 | 81 | 80 | 78 | 76 | 66 |