YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1893 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.32 | 68.79 | 61.77 | b | 47.85 | 29.78 | c | 11.32 | 48.47 | f | ||||
1894 | 7.17 | d | 14.84 | 32.37 | 45.53 | 57.62 | a | 70.06 | c | 74.27 | 71.60 | 61.40 | a | 47.24 | 26.88 | 23.40 | e | 44.36 | ||||||||
1895 | 1.50 | 8.55 | 29.26 | l | 51.57 | a | 56.58 | 62.60 | 67.55 | b | 66.53 | b | 63.09 | b | 45.00 | b | 26.40 | 18.53 | a | 42.54 | a | |||||
1896 | 10.11 | 18.53 | 18.65 | a | 44.38 | 59.39 | 64.62 | f | 68.24 | 68.84 | b | 56.53 | 43.50 | 15.27 | b | 20.10 | 38.50 | a | ||||||||
1897 | 4.43 | b | 11.30 | 15.94 | 45.16 | b | 57.79 | s | 62.10 | 70.66 | 63.40 | 67.58 | 49.80 | c | 26.33 | 12.90 | 39.06 | a | ||||||||
1898 | 19.27 | 16.52 | 30.12 | a | 43.67 | a | 54.63 | 65.84 | a | 68.07 | c | 66.28 | b | 59.86 | b | 41.68 | 26.59 | a | 15.02 | b | 42.30 | |||||
1899 | 13.82 | a | 5.93 | 14.18 | 44.67 | 55.45 | 64.45 | 70.21 | 69.10 | 56.77 | 47.18 | a | 39.13 | 17.31 | b | 41.52 | ||||||||||
1900 | 21.89 | l | 6.14 | c | 24.29 | b | 48.50 | 56.68 | a | 65.07 | 67.46 | c | ----- | z | 61.09 | a | 57.24 | n | 16.97 | o | 20.37 | 43.70 | d | |||
1901 | 13.42 | a | 12.16 | c | 28.90 | a | 47.26 | a | 58.18 | 64.38 | a | 74.76 | l | 70.65 | d | 56.94 | f | 50.75 | i | 27.75 | b | 17.74 | f | 40.34 | d | |
1902 | 17.74 | 18.22 | a | 33.67 | a | 43.18 | 58.45 | b | 59.98 | 69.66 | 66.19 | 55.00 | 46.58 | 32.29 | d | 11.56 | 42.71 | |||||||||
1903 | 12.81 | 10.69 | d | 28.66 | b | 45.28 | e | 56.67 | a | 62.58 | 66.95 | b | 64.97 | a | 55.88 | 48.97 | b | 28.73 | 12.89 | 41.26 | ||||||
1904 | 6.44 | 3.80 | a | 26.60 | 39.15 | 55.89 | 62.25 | 65.05 | j | 66.21 | 57.45 | ----- | z | ----- | z | ----- | z | 39.72 | d | |||||||
1905 | ----- | z | 16.00 | t | 35.52 | 42.72 | 46.06 | w | 61.39 | l | 65.43 | h | 70.76 | 63.92 | x | 43.27 | g | 37.34 | a | 22.24 | b | 41.72 | g | |||
1906 | 18.15 | 19.94 | d | 21.31 | 45.55 | ----- | z | 61.76 | a | 68.62 | o | 67.98 | ----- | z | 42.26 | 25.58 | 13.24 | 35.08 | c | |||||||
1907 | 1.63 | a | 16.72 | a | 33.62 | b | 35.35 | 51.35 | u | 63.58 | 68.85 | a | 66.73 | 56.43 | b | 46.40 | a | 30.90 | a | 20.55 | b | 40.07 | a | |||
1908 | 16.87 | d | 16.50 | 25.48 | c | 46.33 | a | 54.33 | a | 61.55 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.84 | f | |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | 56.08 | e | 65.50 | 69.72 | b | 73.19 | 61.70 | 45.73 | 31.29 | b | 8.47 | b | 51.46 | d | ||||
1910 | 14.23 | g | 9.61 | a | 44.86 | c | 53.39 | g | 51.98 | c | 67.85 | 72.18 | a | 66.77 | 60.84 | a | 55.61 | c | 26.28 | 18.38 | n | 50.67 | c | |||
1911 | ----- | z | ----- | z | ----- | z | ----- | z | 67.00 | m | 71.02 | 70.17 | e | 65.73 | ----- | z | ----- | z | ----- | z | ----- | z | 68.97 | i | ||
1912 | 4.65 | k | 16.10 | 26.62 | f | 48.79 | d | 59.25 | c | 63.50 | 70.18 | 67.18 | 56.74 | a | 50.47 | 36.48 | 23.98 | d | 49.27 | b | ||||||
1913 | 9.92 | 12.12 | 23.45 | 49.22 | 55.77 | a | 69.65 | 69.45 | 73.92 | 61.85 | 44.13 | ----- | z | 25.98 | 45.04 | a | ||||||||||
1914 | 17.28 | b | 5.04 | 27.65 | 42.48 | 58.24 | 66.33 | 75.23 | e | 67.08 | ----- | z | ----- | z | 36.28 | c | 10.02 | b | 40.56 | b | ||||||
1915 | 10.06 | 22.08 | b | 24.84 | 54.27 | 52.48 | 60.96 | b | 65.55 | 65.55 | 59.75 | 50.15 | 34.05 | a | 18.40 | 43.18 | ||||||||||
1916 | 1.32 | 9.48 | d | 26.21 | 42.77 | 55.27 | c | 63.47 | a | 79.21 | 69.74 | 56.10 | 43.30 | a | 26.73 | h | 5.85 | d | 41.16 | a | ||||||
1917 | 5.40 | 0.11 | f | 27.08 | 43.08 | 57.15 | a | 64.67 | 75.67 | b | 70.58 | a | 53.20 | y | 38.16 | 38.03 | 7.45 | 42.73 | b | |||||||
1918 | 2.83 | a | 16.67 | a | 37.66 | 42.38 | a | 58.55 | a | 68.12 | f | 71.08 | a | 72.16 | 55.57 | 50.21 | 34.43 | 21.06 | 42.06 | a | ||||||
1919 | 21.96 | d | 14.23 | 28.77 | 45.38 | 58.57 | a | 70.48 | ----- | z | 70.77 | a | 64.05 | a | 40.38 | b | 23.23 | b | 9.94 | e | 40.71 | a | ||||
1920 | 8.39 | h | 15.17 | c | 29.44 | f | 36.87 | 57.80 | f | 66.52 | 70.87 | d | 70.67 | j | ----- | z | 55.48 | 34.12 | e | 22.73 | c | 43.11 | e | |||
1921 | 23.37 | d | 26.21 | b | 35.50 | c | 49.41 | b | 59.55 | b | 74.22 | c | 76.02 | c | 71.60 | b | 64.21 | b | 57.96 | f | ----- | z | ----- | z | 53.34 | c |
1922 | 17.93 | a | 12.63 | e | 31.64 | b | 47.14 | b | 62.83 | b | 69.63 | d | 70.95 | b | 74.74 | b | 65.64 | a | 54.67 | g | 37.36 | h | 16.05 | b | 46.92 | b |
1923 | 15.94 | e | 7.09 | f | 24.50 | f | 44.95 | b | 58.11 | 69.83 | a | 76.72 | a | 68.94 | 65.04 | d | 48.10 | b | 38.50 | e | 25.60 | f | 54.01 | c | ||
1924 | 3.35 | d | 21.50 | b | 28.17 | b | 43.48 | a | 49.81 | b | 62.60 | a | 68.98 | b | 68.36 | b | 57.67 | c | 54.14 | c | 31.38 | a | 6.85 | a | 41.36 | |
1925 | 9.97 | b | 18.96 | c | 34.29 | e | 52.14 | a | 54.66 | 65.00 | a | 69.13 | 72.59 | c | ----- | z | ----- | z | ----- | z | ----- | z | 47.09 | d | ||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.89 | 68.97 | ----- | z | ----- | z | ----- | z | ----- | z | 70.93 | j | ||
1927 | ----- | z | ----- | z | 33.31 | r | 46.20 | 54.42 | 64.65 | 68.37 | a | 66.97 | a | 62.90 | 50.79 | b | 27.04 | b | 3.35 | e | 49.41 | c | ||||
1928 | 17.90 | a | 21.46 | a | 33.40 | a | 38.73 | 61.69 | b | 63.36 | b | 73.02 | b | 69.57 | b | 58.07 | b | 47.29 | b | 35.28 | 26.00 | 45.48 | ||||
1929 | 0.37 | 6.27 | 34.88 | a | 46.77 | 53.60 | 66.26 | a | 73.58 | 70.82 | 57.98 | 47.48 | g | 28.17 | 19.06 | d | 41.61 | a | ||||||||
1930 | 4.97 | b | 27.89 | 31.60 | a | 48.84 | a | 57.57 | c | 66.88 | 74.18 | 72.29 | b | 59.88 | 46.54 | e | 34.22 | a | 24.38 | b | 45.77 | |||||
1931 | 26.27 | 31.39 | a | 31.35 | 47.41 | a | 55.23 | a | 73.37 | 75.98 | b | 69.97 | 68.02 | a | 52.73 | 36.95 | a | 24.89 | 49.46 | |||||||
1932 | 13.94 | 18.43 | b | 22.31 | 45.27 | 59.09 | b | 69.72 | a | 73.26 | 71.52 | 59.48 | d | 44.38 | a | 29.67 | a | 19.10 | e | 43.85 | ||||||
1933 | 21.40 | a | 16.43 | 32.03 | 45.07 | 58.31 | 76.61 | b | 77.36 | c | 70.74 | b | 67.10 | 47.41 | c | 32.88 | a | 17.35 | k | 49.58 | a | |||||
1934 | 19.36 | b | 21.41 | 29.22 | b | 46.60 | a | 68.10 | 70.37 | 74.63 | 68.97 | 56.15 | 52.74 | 36.75 | 15.31 | 46.63 | ||||||||||
1935 | 9.27 | a | 28.02 | 32.18 | 40.50 | 52.32 | 63.31 | a | 76.60 | 70.74 | 60.45 | 46.53 | 23.92 | 15.87 | a | 43.31 | ||||||||||
1936 | -2.65 | a | -6.79 | 30.35 | 39.50 | 64.02 | a | 68.52 | 81.90 | 73.63 | a | 64.20 | 45.03 | 28.12 | 19.58 | 42.12 | ||||||||||
1937 | -0.72 | a | 11.11 | 27.18 | 42.05 | 59.48 | 64.98 | a | 73.69 | 76.39 | 61.93 | 45.08 | 28.85 | 13.73 | 41.98 | |||||||||||
1938 | 10.58 | 14.41 | 35.65 | 46.70 | 54.21 | 66.35 | 71.06 | 74.84 | 63.00 | 54.85 | 28.52 | 22.00 | a | 45.18 | ||||||||||||
1939 | 16.89 | 5.62 | 29.11 | 42.65 | 63.74 | 67.00 | 72.94 | 70.53 | 63.78 | 47.00 | 37.48 | 29.23 | 45.50 | |||||||||||||
1940 | 5.48 | 16.97 | 24.50 | 42.15 | 56.85 | 66.20 | 74.74 | 67.81 | 65.13 | 53.65 | 25.88 | d | 22.27 | 43.47 | ||||||||||||
1941 | 15.58 | 14.86 | 29.32 | 49.18 | 62.84 | 67.32 | 74.05 | 70.65 | 59.15 | j | 49.16 | 34.95 | 25.80 | a | 44.88 | a | ||||||||||
1942 | 21.62 | a | 19.46 | 34.98 | 50.77 | 53.98 | 64.22 | 69.79 | 69.98 | a | 56.47 | a | 48.53 | ----- | z | ----- | z | 48.98 | b | |||||||
1943 | 1.11 | 17.04 | 22.32 | 47.22 | 53.23 | a | 65.53 | 73.39 | 70.60 | 57.83 | 49.55 | 30.38 | 24.03 | 42.69 | ||||||||||||
1944 | 25.64 | b | 17.28 | 22.95 | 41.42 | 59.94 | 66.35 | 70.18 | 68.87 | 60.21 | a | 50.76 | 35.03 | 20.65 | 44.94 | |||||||||||
1945 | 14.97 | 10.60 | b | 38.68 | 42.27 | 51.84 | 60.82 | 69.85 | 69.97 | a | 58.98 | 47.98 | 29.05 | 9.76 | 42.06 | |||||||||||
1946 | 12.78 | a | 13.02 | a | 38.06 | 50.98 | 54.35 | 67.30 | 71.87 | 68.16 | 58.88 | 46.98 | 31.23 | 17.92 | 44.30 | |||||||||||
1947 | 22.39 | 13.23 | 28.02 | 41.43 | 53.45 | b | 63.32 | 72.31 | 77.00 | c | 62.23 | 56.24 | 25.33 | 15.61 | 44.21 | |||||||||||
1948 | 7.66 | 11.12 | 22.48 | 48.43 | 57.68 | 65.69 | a | 72.53 | a | 70.92 | 66.25 | 49.71 | 32.37 | 18.05 | 43.57 | |||||||||||
1949 | 8.39 | 10.31 | a | 28.55 | 47.82 | 61.47 | 69.27 | 73.23 | 74.35 | 58.18 | 50.19 | 38.27 | 15.98 | a | 44.67 | |||||||||||
1950 | 0.07 | a | 14.62 | 25.20 | a | 35.88 | 54.35 | a | 68.28 | c | 68.93 | a | 66.47 | a | 61.12 | 50.40 | 22.37 | d | 10.39 | 39.84 | ||||||
1951 | 6.52 | a | 17.94 | c | 16.30 | f | 42.04 | c | 59.61 | 62.03 | a | 70.35 | a | 67.71 | 56.42 | 46.89 | 24.64 | a | 12.16 | b | 42.39 | a | ||||
1952 | 7.85 | d | 20.57 | 20.45 | a | 47.91 | a | 56.55 | a | 70.02 | 73.48 | 71.24 | 65.40 | 45.47 | 34.17 | a | 21.16 | 44.52 | ||||||||
1953 | 14.05 | 18.95 | 30.45 | 40.03 | 56.15 | 67.03 | 70.29 | c | 71.89 | 60.88 | a | 56.59 | b | 37.57 | a | 18.66 | 45.21 | |||||||||
1954 | 4.75 | a | 31.40 | b | 27.29 | b | 44.87 | 51.61 | 66.07 | a | 72.42 | a | 69.97 | 59.13 | 46.10 | 38.52 | a | 22.83 | b | 44.58 | ||||||
1955 | 14.55 | 10.12 | 24.10 | a | 53.60 | a | 62.97 | 65.25 | 75.47 | 73.66 | 60.53 | 50.82 | a | 21.36 | a | 8.06 | 43.38 | |||||||||
1956 | 10.05 | 11.33 | 25.11 | 38.57 | b | 56.89 | 71.27 | 67.95 | 68.68 | 58.42 | 55.42 | 32.19 | a | 24.16 | 43.34 | |||||||||||
1957 | 7.53 | b | 19.02 | 29.89 | 45.55 | a | 55.16 | 64.64 | e | 75.63 | e | 69.48 | a | 58.28 | 48.11 | 32.58 | 26.47 | b | 44.36 | |||||||
1958 | 20.97 | 14.04 | 30.37 | 46.82 | b | 62.15 | k | 61.98 | i | 70.82 | a | 73.85 | 64.83 | c | 52.32 | 31.79 | d | 14.77 | a | 42.06 | b | |||||
1959 | 8.58 | 12.68 | 34.08 | 45.97 | 58.31 | 70.52 | 73.08 | 74.44 | 62.48 | d | 41.89 | 23.25 | 28.15 | 44.45 | ||||||||||||
1960 | 12.05 | 14.34 | 16.75 | a | 43.52 | a | 56.65 | 63.35 | 72.81 | 71.58 | 61.93 | 48.63 | 32.23 | 14.95 | a | 42.40 | ||||||||||
1961 | 12.95 | a | 22.21 | 35.77 | 40.10 | a | 54.10 | 69.60 | 69.71 | 74.02 | 58.95 | 50.02 | 32.55 | 11.73 | 44.31 | |||||||||||
1962 | 9.71 | 12.09 | 23.92 | 42.90 | 58.84 | 65.92 | 67.65 | 70.60 | 57.27 | 51.16 | 36.60 | 19.98 | 43.05 | |||||||||||||
1963 | 5.20 | a | 15.64 | 35.15 | 46.72 | 55.44 | 68.60 | 71.44 | 69.61 | 62.86 | a | 57.90 | 36.31 | a | 10.45 | 44.61 | ||||||||||
1964 | 20.50 | 23.02 | a | 22.89 | 46.63 | 61.16 | 67.93 | 74.47 | 67.55 | 57.42 | 49.87 | 31.62 | 9.58 | a | 44.39 | |||||||||||
1965 | 4.98 | 13.21 | 18.55 | 43.80 | ----- | z | 65.97 | 70.45 | 69.61 | 50.62 | 52.00 | 31.87 | 31.75 | y | 42.11 | b | ||||||||||
1966 | -1.46 | f | 12.34 | 24.25 | y | 40.69 | i | 54.19 | 66.88 | 77.15 | 67.62 | a | 59.63 | 48.58 | 26.57 | c | 16.89 | 47.76 | c | |||||||
1967 | 13.52 | 9.31 | a | 32.12 | a | 44.12 | 52.05 | 65.32 | 69.29 | 67.50 | 61.53 | a | 46.79 | 31.37 | 19.35 | 42.69 | ||||||||||
1968 | 12.74 | 12.09 | 40.38 | a | 46.95 | a | 53.05 | 65.93 | 71.52 | a | 70.42 | 60.33 | 48.24 | 32.98 | 13.24 | 43.99 | ||||||||||
1969 | 3.72 | a | 15.46 | 19.73 | 46.20 | 58.85 | 59.36 | e | 70.15 | 73.89 | 61.89 | b | 43.06 | 32.97 | 18.29 | 41.96 | ||||||||||
1970 | 2.81 | 16.86 | 23.89 | 41.95 | 56.89 | 68.55 | 73.55 | 71.18 | 61.92 | 48.53 | 29.15 | 15.35 | 42.55 | |||||||||||||
1971 | 5.16 | 16.39 | 30.76 | 47.30 | 55.27 | 68.97 | 67.55 | 70.63 | 60.98 | 50.60 | 31.13 | 13.73 | 43.21 | |||||||||||||
1972 | 7.34 | 9.31 | 27.11 | 42.15 | 60.02 | a | 66.90 | 69.85 | 70.69 | 59.23 | 45.16 | 30.23 | 8.18 | 41.35 | ||||||||||||
1973 | 16.10 | 21.96 | 38.40 | 44.80 | 56.21 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.49 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.11 | 15.12 | 28.73 | 44.89 | 56.96 | 66.26 | 71.89 | 70.04 | 60.45 | 48.53 | 31.04 | 17.02 | 43.64 | |||||||||||||
S.D. | 7.05 | 6.38 | 6.14 | 3.82 | 3.39 | 3.35 | 3.10 | 2.77 | 3.39 | 4.05 | 4.89 | 6.02 | 1.68 | |||||||||||||
SKEW | 0.16 | -0.04 | -0.03 | -0.08 | 0.60 | 0.44 | 0.57 | 0.18 | 0.03 | 0.08 | -0.51 | -0.10 | 0.67 | |||||||||||||
MAX | 26.27 | 31.40 | 44.86 | 54.27 | 68.10 | 76.61 | 81.90 | 77.00 | 68.02 | 57.90 | 39.13 | 29.23 | 49.46 | |||||||||||||
MIN | -2.65 | -6.79 | 14.18 | 35.35 | 49.81 | 59.36 | 65.55 | 63.40 | 50.62 | 38.16 | 15.27 | 3.35 | 39.84 | |||||||||||||
YRS | 70 | 73 | 70 | 75 | 71 | 74 | 74 | 77 | 69 | 68 | 69 | 68 | 44 |