YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1872 | 23.69 | 33.86 | 37.29 | 45.23 | 56.68 | 66.95 | 69.10 | 69.32 | 60.27 | 50.26 | 33.08 | 28.34 | 47.84 | |||||||||||||
1873 | 30.24 | 30.62 | 44.98 | 41.13 | 53.89 | 69.13 | 72.35 | 72.16 | 61.07 | 46.60 | 42.55 | 22.73 | 48.95 | |||||||||||||
1874 | 32.66 | 25.59 | 36.94 | 43.15 | 61.00 | 69.73 | 76.08 | 73.55 | 60.82 | 53.27 | 42.22 | 31.02 | 50.50 | |||||||||||||
1875 | 18.13 | 33.16 | 34.65 | 45.05 | 61.08 | 69.47 | 69.00 | 70.44 | 64.13 | 56.29 | 37.80 | 38.81 | 49.83 | |||||||||||||
1876 | 27.81 | 38.28 | 35.16 | 48.52 | 56.97 | 65.52 | 74.32 | 70.63 | 62.35 | 52.32 | 37.82 | 27.61 | 49.77 | |||||||||||||
1877 | 24.21 | 35.59 | 42.68 | 43.93 | 56.58 | 64.72 | 74.48 | 72.39 | 62.83 | 46.32 | 35.90 | 33.63 | 49.44 | |||||||||||||
1878 | 26.32 | 37.25 | 45.19 | 50.20 | 55.00 | 64.23 | 75.95 | 74.56 | 60.62 | 50.40 | 42.03 | 22.08 | 50.32 | |||||||||||||
1879 | 24.65 | 36.66 | 46.53 | 50.25 | 61.61 | 69.08 | 74.23 | 71.00 | 62.90 | 53.55 | 39.60 | 28.02 | 51.51 | |||||||||||||
1880 | 36.42 | 28.29 | 34.37 | 48.12 | 58.44 | 68.08 | 71.53 | 70.47 | 62.05 | 48.65 | 22.02 | 30.11 | 48.21 | |||||||||||||
1881 | 26.03 | 30.16 | 38.60 | 53.80 | 60.77 | 71.97 | 75.84 | 73.34 | 60.38 | 51.26 | 36.35 | 39.47 | 51.50 | |||||||||||||
1882 | 28.77 | 37.66 | 42.26 | 46.90 | 53.02 | 65.28 | 71.11 | 71.90 | 63.33 | 51.40 | 38.13 | 35.55 | 50.44 | |||||||||||||
1883 | 27.81 | 22.21 | 43.65 | 45.28 | 54.26 | 64.43 | 70.66 | 71.13 | 62.40 | 47.18 | 43.67 | 32.98 | 48.80 | |||||||||||||
1884 | 31.63 | 30.03 | 39.16 | 42.85 | 54.11 | 66.45 | 73.35 | 67.81 | 64.48 | 55.32 | 42.68 | 24.77 | 49.39 | |||||||||||||
1885 | 28.19 | 32.68 | 39.34 | 46.97 | 53.18 | 64.73 | 72.13 | 68.82 | 62.73 | 50.65 | 43.90 | 36.47 | 49.98 | |||||||||||||
1886 | 21.74 | 39.12 | 34.52 | 45.58 | 61.95 | 65.73 | 74.23 | 71.76 | 60.35 | 51.92 | 32.97 | 35.37 | 49.60 | |||||||||||||
1887 | 30.71 | 31.62 | 46.00 | 48.28 | 59.27 | 69.00 | 69.73 | 68.76 | 63.32 | 48.32 | 40.98 | 30.31 | 50.53 | |||||||||||||
1888 | 28.13 | 39.14 | 33.76 | 53.33 | 53.87 | 67.85 | 74.19 | 68.00 | 62.75 | 51.23 | 37.05 | 37.27 | 50.55 | |||||||||||||
1889 | 27.18 | 29.62 | 43.26 | 51.00 | 55.47 | 64.27 | 72.05 | 72.77 | 59.92 | 51.73 | 32.50 | 40.47 | 50.02 | |||||||||||||
1890 | 28.27 | 34.04 | 40.87 | 47.95 | 57.66 | 67.57 | 74.81 | 69.00 | 62.50 | 49.45 | 40.22 | 39.23 | 50.96 | |||||||||||||
1891 | 25.29 | 26.71 | 32.24 | 47.97 | 56.16 | 63.38 | 68.85 | 69.18 | 64.17 | 52.26 | 37.68 | 31.18 | 47.92 | |||||||||||||
1892 | 26.00 | 33.48 | 36.81 | 45.80 | 51.53 | 64.93 | 71.89 | 71.24 | 65.95 | 50.26 | 42.82 | 26.68 | 48.95 | |||||||||||||
1893 | 38.27 | 31.34 | 38.03 | 45.12 | 54.32 | 68.53 | 73.42 | 70.02 | 63.33 | 51.44 | 39.05 | 38.18 | 50.92 | |||||||||||||
1894 | 31.35 | 24.91 | 40.15 | 49.67 | 58.92 | 66.00 | 71.65 | 71.13 | 62.62 | 53.95 | 44.82 | 31.68 | 50.57 | |||||||||||||
1895 | 28.42 | 26.59 | 37.26 | 49.80 | 55.60 | 61.73 | 67.31 | 70.18 | 65.58 | 50.68 | 37.82 | 34.08 | 48.75 | |||||||||||||
1896 | 37.32 | 37.74 | 37.37 | 49.65 | 58.82 | 68.10 | 71.89 | 71.81 | 61.12 | 50.10 | 35.92 | 38.81 | 51.55 | |||||||||||||
1897 | 26.74 | 31.25 | 35.53 | 47.43 | 60.44 | 65.13 | 69.68 | 69.68 | 66.30 | 51.00 | 40.78 | 28.31 | 49.36 | |||||||||||||
1898 | 29.27 | 37.77 | 35.68 | 49.45 | 52.95 | 66.98 | 72.34 | 72.53 | 61.80 | 48.95 | 35.15 | 25.76 | 49.05 | |||||||||||||
1899 | 30.40 | 17.70 | 33.06 | 48.78 | 56.76 | 66.75 | 70.48 | 71.90 | 64.92 | 49.40 | 44.82 | 30.26 | 48.77 | |||||||||||||
1900 | 36.34 | 30.20 | 42.76 | 44.62 | 60.56 | 70.50 | 71.24 | 72.44 | 61.70 | 53.94 | 41.87 | 36.23 | 51.86 | |||||||||||||
1901 | 34.21 | 27.71 | 38.11 | 46.40 | 59.53 | 67.50 | 76.47 | 73.00 | 62.68 | 53.68 | 45.58 | 33.84 | 51.56 | |||||||||||||
1902 | 28.98 | 37.00 | 38.05 | 49.45 | 59.90 | 67.47 | 70.23 | 72.37 | 60.95 | 52.97 | 41.17 | 33.24 | 50.98 | |||||||||||||
1903 | 34.77 | 22.66 | 37.92 | 48.10 | 54.89 | 62.48 | 73.60 | 72.32 | 60.67 | 52.55 | 41.13 | 36.37 | 49.79 | |||||||||||||
1904 | 31.05 | 40.12 | 42.39 | 49.33 | 56.26 | 61.52 | 68.74 | 69.94 | 63.07 | 52.10 | 43.90 | 34.66 | 51.09 | |||||||||||||
1905 | 27.56 | 25.20 | 43.18 | 44.65 | 53.53 | 67.48 | 68.90 | 72.94 | 65.15 | 46.61 | 41.75 | 31.89 | 49.07 | |||||||||||||
1906 | 36.52 | 35.32 | 29.66 | 48.62 | 57.34 | 63.93 | 68.24 | 70.11 | 62.08 | 49.32 | 37.30 | 39.74 | 49.85 | |||||||||||||
1907 | 31.79 | 40.30 | 47.18 | 45.70 | 50.34 | 63.98 | 71.90 | 71.23 | 62.95 | 53.42 | 38.70 | 33.77 | 50.94 | |||||||||||||
1908 | 33.95 | 34.91 | 43.60 | 50.33 | 53.79 | 64.60 | 69.76 | 68.76 | 65.08 | 48.74 | 37.43 | 31.35 | 50.19 | |||||||||||||
1909 | 36.68 | 33.23 | 37.05 | 43.18 | 53.27 | 65.70 | 72.95 | 72.48 | 61.20 | 52.45 | 42.67 | 21.18 | 49.34 | |||||||||||||
1910 | 31.65 | 30.18 | 50.42 | 52.20 | 54.77 | 68.05 | 74.50 | 70.58 | 64.30 | 55.40 | 45.57 | 35.11 | 52.73 | |||||||||||||
1911 | 38.18 | 30.05 | 45.13 | 48.83 | 58.85 | 70.70 | 69.58 | 70.23 | 66.22 | 46.89 | 36.37 | 27.44 | 50.71 | |||||||||||||
1912 | 32.74 | 30.05 | 26.35 | 46.38 | 56.21 | 63.03 | 69.26 | 70.10 | 54.68 | 49.40 | 42.73 | 30.52 | 47.62 | |||||||||||||
1913 | 30.31 | 21.77 | 37.73 | 48.92 | 57.44 | 66.98 | 71.55 | 73.08 | 59.25 | 46.48 | 43.75 | 23.10 | 48.36 | |||||||||||||
1914 | 36.84 | 31.20 | 40.35 | 46.48 | 57.34 | 68.55 | 72.15 | 70.94 | 64.75 | 53.26 | 46.17 | 24.32 | 51.03 | |||||||||||||
1915 | 29.21 | 36.09 | 33.60 | 51.48 | 52.87 | 62.12 | 68.71 | 66.48 | 61.70 | 54.15 | 43.25 | 32.98 | 49.39 | |||||||||||||
1916 | 22.77 | 36.50 | 45.71 | 46.45 | 55.34 | 66.08 | 74.11 | 69.03 | 61.42 | 48.16 | 38.07 | 26.50 | 49.18 | |||||||||||||
1917 | 28.32 | 34.70 | 33.19 | 43.92 | 48.74 | 65.63 | 73.68 | 68.42 | 64.78 | 49.65 | 45.47 | 37.95 | 49.54 | |||||||||||||
1918 | 24.56 | 36.91 | 47.03 | 42.57 | 57.55 | 71.25 | 71.15 | 70.58 | 58.07 | 54.66 | 36.57 | 30.52 | 50.12 | |||||||||||||
1919 | 34.18 | 31.07 | 40.71 | 49.10 | 57.81 | 67.62 | 74.92 | 72.53 | 64.33 | 46.45 | 34.55 | 32.97 | 50.52 | |||||||||||||
1920 | 36.03 | 32.60 | 37.76 | 38.83 | 57.05 | 65.73 | 72.15 | 67.73 | 62.53 | 52.16 | 36.67 | 31.50 | 49.23 | |||||||||||||
1921 | 33.79 | 36.98 | 44.94 | 45.27 | 57.55 | 67.22 | 72.48 | 71.16 | 63.92 | 55.90 | 43.73 | 35.42 | 52.36 | |||||||||||||
1922 | 27.69 | 31.38 | 40.34 | 45.17 | 57.71 | 70.43 | 71.81 | 74.18 | 65.85 | 52.76 | 37.22 | 35.11 | 50.80 | |||||||||||||
1923 | 37.90 | 28.11 | 33.89 | 46.63 | 56.13 | 65.45 | 72.53 | 68.42 | 60.62 | 44.29 | 41.75 | 30.50 | 48.85 | |||||||||||||
1924 | 30.38 | a | 37.57 | 27.97 | 46.00 | 52.66 | 68.40 | 71.84 | 73.26 | 60.45 | 54.39 | 44.37 | 25.55 | 49.40 | ||||||||||||
1925 | 31.39 | 41.00 | 44.48 | 52.83 | 60.23 | 67.18 | 73.35 | 69.68 | 63.80 | 43.27 | 40.93 | 32.06 | 51.68 | |||||||||||||
1926 | 31.16 | 38.96 | 37.63 | 47.62 | 58.61 | 66.65 | 70.79 | 72.92 | 61.62 | 53.65 | 42.77 | 29.81 | 51.01 | |||||||||||||
1927 | 35.23 | 36.68 | 35.98 | 47.88 | 59.58 | 64.67 | 71.24 | 66.60 | 61.95 | 54.61 | 45.87 | 25.94 | 50.52 | |||||||||||||
1928 | 36.53 | 33.26 | 41.97 | 45.88 | 57.71 | 61.00 | 71.05 | 70.55 | 62.65 | 50.74 | 39.57 | 31.29 | 50.18 | |||||||||||||
1929 | 27.65 | 23.61 | 39.74 | 46.62 | 54.39 | 67.20 | 73.45 | 73.06 | 58.85 | 51.21 | 31.52 | 37.08 | 48.70 | |||||||||||||
1930 | 16.90 | 42.29 | 37.11 | 55.48 | 54.63 | 69.22 | 73.94 | 71.65 | 63.75 | 50.15 | 40.35 | 32.18 | 50.64 | |||||||||||||
1931 | 35.74 | 38.79 | 36.58 | 47.52 | 54.94 | 71.30 | 75.95 | 72.26 | 68.17 | 54.03 | 37.65 | 35.79 | 52.39 | |||||||||||||
1932 | 27.74 | 39.83 | 33.31 | 51.23 | 59.48 | 66.62 | 75.63 | 73.85 | 63.57 | 48.68 | 44.00 | 23.68 | 50.63 | |||||||||||||
1933 | 35.98 | 29.25 | 43.05 | 45.25 | 55.15 | 72.82 | 75.26 | 70.65 | 67.72 | 57.37 | 46.18 | 43.76 | 53.54 | |||||||||||||
1934 | 40.06 | 36.54 | 43.85 | 51.40 | 64.66 | 70.05 | 77.81 | 74.35 | 60.70 | 57.85 | 44.35 | 36.05 | 54.81 | |||||||||||||
1935 | 39.35 | 38.04 | 43.65 | 45.53 | 50.15 | 66.68 | 74.84 | 73.56 | 63.30 | 52.32 | 38.78 | 34.87 | 51.76 | |||||||||||||
1936 | 32.19 | 26.86 | 41.15 | 50.53 | 61.29 | 71.12 | 77.32 | 73.58 | 63.83 | 49.81 | 41.83 | 36.45 | 52.16 | |||||||||||||
1937 | 18.21 | 33.45 | 37.31 | 47.28 | 59.05 | 64.72 | 74.74 | 76.81 | 66.12 | 53.79 | 40.58 | 33.82 | 50.49 | |||||||||||||
1938 | 34.90 | 37.21 | 42.56 | 49.12 | 56.00 | 67.78 | 72.34 | 74.66 | 65.37 | 55.89 | 37.10 | 33.92 | 52.24 | |||||||||||||
1939 | 33.42 | 25.84 | 40.31 | 49.47 | 61.50 | 68.80 | 77.08 | 71.79 | 67.00 | 54.68 | 43.75 | 40.85 | 52.87 | |||||||||||||
1940 | 24.34 | 35.59 | 42.76 | 48.30 | 59.48 | 70.35 | 74.61 | 71.82 | 65.17 | 55.85 | 37.88 | 35.58 | 51.81 | |||||||||||||
1941 | 34.34 | 37.29 | 37.24 | 46.87 | 61.03 | 65.57 | 72.89 | 71.74 | 61.70 | 50.13 | 44.28 | 34.98 | 51.50 | |||||||||||||
1942 | 29.95 | 24.14 | 38.15 | 51.53 | 56.21 | 64.92 | 73.29 | 71.71 | 61.28 | 51.45 | 43.05 | 37.05 | 50.23 | |||||||||||||
1943 | 34.73 | 40.50 | 36.45 | 55.25 | 52.84 | 66.35 | 75.92 | 74.24 | 63.12 | 53.97 | 42.35 | 35.00 | 52.56 | |||||||||||||
1944 | 32.34 | 33.28 | 34.53 | 43.22 | 58.52 | 67.38 | 71.74 | 73.66 | 64.17 | 55.16 | 42.00 | 32.63 | 50.72 | |||||||||||||
1945 | 33.85 | 34.70 | 43.19 | 42.23 | 57.19 | 62.03 | 73.02 | 71.76 | 60.75 | 54.94 | 43.65 | 32.44 | 50.81 | |||||||||||||
1946 | 34.26 | 37.71 | 46.35 | 56.33 | 51.95 | 69.22 | 74.81 | 71.73 | 64.30 | 49.37 | 36.93 | 39.56 | 52.71 | |||||||||||||
1947 | 33.32 | 30.54 | 37.42 | 46.75 | 56.16 | 62.65 | 73.61 | 74.08 | 67.55 | 56.95 | 34.87 | 35.94 | 50.82 | |||||||||||||
1948 | 29.97 | 30.09 | 33.68 | 53.23 | 59.73 | 67.20 | 74.23 | 74.06 | 68.32 | 52.92 | 38.68 | 32.39 | 51.21 | |||||||||||||
1949 | 19.44 | 33.55 | 40.29 | 50.78 | 57.72 | a | 66.23 | 73.61 | 72.94 | 63.97 | 50.45 | 50.90 | 35.81 | b | 51.31 | |||||||||||
1950 | 31.21 | 40.45 | 39.39 | 47.75 | b | 53.56 | 67.83 | 69.45 | 70.06 | 60.68 | 61.85 | 40.93 | 38.37 | 51.80 | ||||||||||||
1951 | 29.53 | 37.11 | 36.52 | 44.92 | 58.53 | 61.63 | 74.34 | 71.84 | 61.80 | 49.10 | 39.68 | 30.85 | 49.65 | |||||||||||||
1952 | 37.24 | 36.71 | 34.71 | 49.28 | 57.92 | 73.60 | 73.85 | 73.16 | 66.45 | 54.85 | 34.13 | 35.61 | 52.29 | |||||||||||||
1953 | 43.32 | 34.39 | 45.10 | 43.68 | 54.44 | 71.05 | 74.94 | 72.31 | 67.62 | 55.35 | 44.58 | 33.79 | 53.38 | |||||||||||||
1954 | 38.19 | 45.98 | 36.26 | 55.07 | 57.94 | 70.73 | 78.13 | 73.95 | 66.63 | 53.84 | 46.15 | 38.06 | 55.08 | |||||||||||||
1955 | 30.74 | 28.86 | 37.65 | 52.00 | 60.05 | 64.78 | 76.39 | 73.61 | 65.17 | 55.24 | 37.38 | 36.98 | 51.57 | |||||||||||||
1956 | 35.52 | 29.95 | 41.89 | 46.38 | 61.50 | 74.75 | 72.69 | 70.31 | 67.62 | 57.66 | 39.95 | 38.24 | 53.04 | |||||||||||||
1957 | 27.37 | 42.66 | 40.31 | 42.63 | 54.60 | 66.68 | 74.90 | 73.56 | 62.17 | 52.34 | 38.23 | 42.84 | 51.52 | |||||||||||||
1958 | 35.84 | 38.89 | 33.05 | 45.42 | 63.05 | 68.83 | 70.84 | 74.92 | 65.48 | 55.71 | 42.77 | 38.45 | 52.77 | |||||||||||||
1959 | 32.06 | 32.73 | 39.35 | 46.52 | 56.82 | 71.92 | 74.05 | 74.08 | 61.92 | 48.81 | 40.05 | a | 38.27 | 51.38 | ||||||||||||
1960 | 30.79 | 25.64 | 39.63 | 51.78 | 58.89 | 69.72 | 74.45 | 74.05 | 66.27 | 54.08 | 42.83 | 32.81 | 51.74 | |||||||||||||
1961 | 35.58 | 37.89 | 39.97 | 47.12 | 57.24 | 68.33 | 73.02 | 72.77 | 57.13 | 52.16 | 38.37 | 30.89 | 50.87 | |||||||||||||
1962 | 26.53 | a | 33.21 | 37.45 | 52.58 | 61.90 | 66.52 | 73.55 | 74.11 | 64.10 | 56.79 | 45.07 | 38.23 | 52.50 | ||||||||||||
1963 | 24.18 | 41.21 | 41.06 | 52.30 | 63.03 | 70.25 | 77.27 | 71.10 | 68.43 | 60.23 | 45.13 | 32.40 | 53.88 | |||||||||||||
1964 | 33.74 | 29.47 | 34.15 | 47.18 | 60.16 | 67.45 | 78.32 | 71.44 | 64.28 | 55.26 | 41.70 | 36.03 | 51.60 | |||||||||||||
1965 | 38.06 | 30.84 | 29.31 | 52.18 | 57.69 | 65.92 | 73.24 | 70.47 | 55.63 | 57.94 | 47.55 | 39.50 | 51.53 | |||||||||||||
1966 | 31.26 | 31.71 | 45.53 | 46.80 | 62.37 | 68.20 | 78.47 | 71.74 | 65.53 | 53.18 | 43.30 | 33.81 | 52.66 | |||||||||||||
1967 | 37.21 | 37.45 | 44.42 | 50.75 | 54.11 | 62.90 | 72.69 | 70.37 | 63.72 | 54.73 | 42.03 | 28.40 | 51.57 | |||||||||||||
1968 | 33.53 | 36.67 | 42.95 | 45.20 | 54.97 | 70.12 | 72.81 | 69.94 | 63.20 | 54.66 | 38.17 | 32.52 | 51.23 | |||||||||||||
1969 | 37.55 | 37.32 | 33.27 | 53.48 | 60.69 | 61.97 | 75.18 | 75.21 | 67.15 | 40.76 | 41.75 | 35.58 | 51.66 | |||||||||||||
1970 | 33.69 | 41.20 | 34.56 | 45.30 | 61.40 | 67.83 | 74.53 | 75.39 | 60.63 | 47.39 | 40.90 | 36.81 | 51.64 | |||||||||||||
1971 | 35.15 | 32.39 | 40.19 | 48.47 | 55.68 | 71.17 | 71.32 | 74.11 | 58.92 | 51.60 | 42.43 | 34.85 | 51.36 | |||||||||||||
1972 | 33.24 | 39.90 | 47.45 | 49.67 | 58.94 | 70.02 | 71.31 | 71.21 | 64.05 | 51.44 | 34.63 | 28.03 | 51.66 | |||||||||||||
1973 | 29.73 | 36.71 | 39.03 | 42.92 | 57.34 | b | 71.07 | 69.38 | k | 75.67 | e | 60.57 | b | 55.87 | e | 40.82 | e | 38.60 | k | 50.97 | b | |||||
1974 | 28.72 | h | 42.97 | i | 47.74 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.74 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.24 | 33.56 | 39.22 | 47.92 | 57.14 | 67.15 | 73.00 | 71.73 | 63.11 | 52.10 | 40.46 | 33.28 | 50.81 | |||||||||||||
S.D. | 5.09 | 5.33 | 4.69 | 3.39 | 3.15 | 2.89 | 2.44 | 2.05 | 2.65 | 3.52 | 4.12 | 4.74 | 1.47 | |||||||||||||
SKEW | -0.49 | -0.44 | -0.12 | 0.18 | -0.12 | 0.04 | 0.01 | -0.21 | -0.32 | -0.28 | -0.92 | -0.46 | 0.23 | |||||||||||||
MAX | 43.32 | 45.98 | 50.42 | 56.33 | 64.66 | 74.75 | 78.47 | 76.81 | 68.43 | 61.85 | 50.90 | 43.76 | 55.08 | |||||||||||||
MIN | 16.90 | 17.70 | 26.35 | 38.83 | 48.74 | 61.00 | 67.31 | 66.48 | 54.68 | 40.76 | 22.02 | 21.18 | 47.62 | |||||||||||||
YRS | 102 | 102 | 103 | 102 | 102 | 102 | 101 | 102 | 102 | 102 | 102 | 101 | 101 |