| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1889 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1890 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1891 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1892 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1893 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1894 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1896 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1897 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1898 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1911 | 33.42 | s | 26.04 | 28.52 | b | 33.59 | a | 39.30 | a | 48.87 | 52.74 | 47.59 | b | 43.73 | 32.00 | g | 18.67 | 10.81 | 34.98 | |||||||
| 1912 | 6.45 | 21.14 | 25.71 | 31.13 | 39.06 | 49.20 | 53.48 | b | 52.58 | 38.90 | ----- | z | ----- | z | ----- | z | 35.30 | |||||||||
| 1913 | ----- | z | ----- | z | ----- | z | 30.44 | l | 40.37 | a | 49.43 | 52.23 | e | 54.43 | q | 56.50 | z | ----- | z | 30.93 | o | 11.27 | a | 38.32 | ||
| 1914 | 7.04 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.88 | w | 44.63 | 36.77 | 23.88 | d | 8.72 | b | 24.21 | |||
| 1915 | 4.07 | a | 15.00 | a | 27.04 | d | 39.96 | b | 40.42 | 47.47 | 52.71 | 53.74 | 45.14 | a | 33.50 | q | ----- | z | 18.25 | z | 36.17 | |||||
| 1916 | 2.40 | p | 9.72 | ----- | z | ----- | z | 36.61 | 48.80 | 53.35 | 49.97 | 39.70 | j | ----- | z | ----- | z | ----- | z | 39.69 | ||||||
| 1917 | ----- | z | 15.83 | e | 20.48 | 32.33 | 39.81 | 50.07 | 61.90 | 55.81 | 49.03 | 37.16 | ----- | z | ----- | z | 40.27 | |||||||||
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | 38.74 | 56.93 | a | 54.50 | a | 70.25 | z | ----- | z | ----- | z | 8.89 | u | ----- | z | 50.06 | ||
| 1919 | 2.42 | 9.36 | 23.23 | 33.50 | x | 53.86 | q | 52.57 | ----- | z | ----- | z | 43.30 | t | 28.36 | c | 19.40 | 7.85 | d | 20.45 | ||||||
| 1920 | 7.03 | 22.97 | 25.13 | 26.83 | 43.55 | 46.67 | 53.94 | 52.81 | 41.32 | k | 32.32 | 23.56 | l | 10.61 | 32.19 | |||||||||||
| 1921 | 10.13 | 19.21 | 28.03 | 29.67 | 39.97 | 49.63 | 53.94 | 51.42 | 39.70 | 35.76 | b | 20.57 | 19.58 | 33.13 | ||||||||||||
| 1922 | 3.55 | 12.04 | 24.06 | 29.03 | 38.35 | 48.63 | 53.65 | 55.93 | d | 45.30 | 32.45 | 22.50 | 19.23 | 32.06 | ||||||||||||
| 1923 | 14.35 | 6.74 | a | 22.58 | 31.83 | 42.61 | 45.13 | ----- | z | ----- | z | 40.39 | g | 30.45 | 23.37 | 12.26 | 25.48 | |||||||||
| 1924 | 0.97 | ----- | z | ----- | z | 18.00 | 37.90 | 40.37 | c | 52.70 | a | 47.48 | 37.52 | a | 33.35 | 19.37 | -2.23 | 28.54 | ||||||||
| 1925 | -6.23 | 18.46 | ----- | z | ----- | z | 48.90 | u | 49.07 | 57.55 | 52.74 | 44.13 | 33.26 | 21.40 | 16.16 | 31.84 | ||||||||||
| 1926 | 12.19 | 20.64 | 25.35 | 37.13 | 42.48 | 49.63 | 53.68 | 53.03 | 41.21 | f | 32.32 | 23.13 | 10.65 | 32.75 | ||||||||||||
| 1927 | 11.73 | e | 19.71 | 27.06 | 31.32 | k | 37.90 | 48.83 | 55.52 | 51.29 | 45.50 | 32.97 | 25.53 | 9.90 | 33.27 | |||||||||||
| 1928 | 12.39 | 20.45 | 28.32 | 30.40 | 45.13 | 44.70 | 51.48 | 49.71 | 41.13 | 34.61 | 26.77 | 9.93 | a | 32.92 | ||||||||||||
| 1929 | 3.58 | 14.61 | 24.26 | 29.67 | 40.06 | 45.13 | 57.06 | 55.32 | 43.17 | 34.29 | 16.77 | 12.52 | 31.37 | |||||||||||||
| 1930 | 0.48 | 16.32 | 25.19 | 36.83 | 37.87 | 48.90 | 55.61 | 54.52 | 42.00 | 31.45 | 18.63 | 7.74 | 31.30 | |||||||||||||
| 1931 | 8.77 | 23.14 | 22.77 | 33.43 | 39.45 | 50.00 | 57.50 | a | 55.03 | 44.80 | 35.23 | 20.20 | 6.30 | a | 33.05 | |||||||||||
| 1932 | -0.45 | 16.79 | a | 24.26 | 30.90 | 39.48 | 47.57 | 55.87 | 52.16 | 43.83 | 29.61 | 20.13 | 5.16 | 30.44 | ||||||||||||
| 1933 | 2.68 | -2.79 | 25.03 | 28.30 | 36.71 | 50.13 | 58.45 | 53.06 | 45.03 | 35.29 | 20.30 | 18.58 | 30.90 | |||||||||||||
| 1934 | 18.06 | 25.61 | 28.58 | 35.70 | 47.32 | 48.53 | 57.84 | 56.61 | 39.82 | b | 31.84 | 20.10 | 15.94 | 35.50 | ||||||||||||
| 1935 | 16.03 | 22.08 | d | 23.81 | 30.03 | 40.19 | 49.83 | 55.48 | 54.52 | 46.57 | 32.52 | 19.62 | a | 11.97 | 33.55 | |||||||||||
| 1936 | 9.52 | 19.34 | 25.55 | 34.67 | 43.16 | 52.83 | 56.97 | 54.87 | ----- | z | ----- | z | 21.00 | q | 15.53 | a | 34.72 | |||||||||
| 1937 | -9.19 | e | 3.75 | 25.32 | f | 30.62 | n | 45.50 | q | 48.95 | i | 58.14 | i | 57.21 | g | 44.92 | r | 35.42 | 22.00 | 19.94 | 14.38 | |||||
| 1938 | 13.41 | b | 21.86 | 25.97 | a | 30.24 | a | 39.30 | d | 52.57 | g | 55.09 | h | 54.58 | 47.24 | a | 34.85 | e | 15.23 | 15.07 | a | 29.77 | ||||
| 1939 | 10.55 | 0.39 | 26.03 | 34.66 | a | 42.81 | d | 45.72 | a | 54.37 | a | 54.93 | a | 47.50 | 34.14 | b | 23.62 | a | 17.29 | 32.67 | ||||||
| 1940 | 10.04 | d | 21.21 | 26.06 | m | 36.12 | m | 46.75 | o | 53.96 | c | 53.41 | n | 56.39 | h | 49.93 | b | 41.64 | i | 20.81 | n | 15.43 | a | 30.11 | ||
| 1941 | 7.96 | c | 20.52 | a | 27.23 | 31.72 | a | 43.81 | 45.50 | 52.55 | 53.67 | a | 42.07 | 33.03 | a | 22.17 | a | 19.79 | c | 33.33 | ||||||
| 1942 | 8.35 | 16.11 | 21.45 | 35.03 | 36.48 | 49.73 | 54.03 | b | 50.97 | a | 41.68 | b | 34.71 | 12.14 | w | ----- | z | 34.86 | ||||||||
| 1943 | 7.68 | f | ----- | z | ----- | z | ----- | z | 37.44 | v | 50.96 | d | 59.52 | 57.93 | a | 51.40 | 40.57 | a | 24.86 | a | 23.42 | 44.09 | ||||
| 1944 | 12.00 | a | 18.39 | a | 26.90 | 34.37 | 44.57 | a | 47.87 | 57.41 | b | 55.73 | a | 50.18 | b | 41.39 | 27.53 | 16.33 | a | 36.06 | ||||||
| 1945 | 17.94 | 25.50 | 26.32 | 30.80 | 45.20 | a | 49.26 | c | 59.58 | 59.65 | 46.83 | 39.39 | 22.67 | 12.06 | 36.27 | |||||||||||
| 1946 | 10.35 | 17.38 | d | 28.84 | 40.93 | 43.16 | 53.12 | d | 61.35 | 57.77 | 50.70 | 36.10 | b | 28.00 | 24.43 | a | 37.68 | |||||||||
| 1947 | 13.81 | 23.88 | c | 30.48 | 36.43 | 48.27 | a | 49.73 | 59.35 | 58.35 | 52.53 | 40.97 | a | 24.27 | 19.71 | 38.15 | ||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.19 | 57.16 | 51.53 | 35.12 | e | 22.93 | a | 15.06 | 39.83 | |||||
| 1949 | 6.90 | 7.38 | b | 30.55 | 40.83 | 46.16 | 49.00 | b | 59.72 | b | 56.52 | b | 49.97 | 35.00 | c | 26.90 | 11.71 | 35.05 | ||||||||
| 1950 | 4.83 | a | 19.04 | a | 26.76 | b | 35.80 | 41.48 | 50.20 | 53.39 | 54.40 | a | 47.90 | a | 39.36 | c | 27.72 | e | 22.58 | g | 36.44 | |||||
| 1951 | 15.97 | b | 18.54 | 25.56 | d | 36.00 | c | 45.45 | b | 50.18 | b | 61.63 | a | 58.10 | 49.00 | b | 36.97 | a | 23.90 | 10.94 | 36.02 | |||||
| 1952 | 8.77 | 14.61 | a | 23.84 | 40.33 | 47.00 | 52.37 | 60.93 | a | 58.65 | 50.30 | 38.57 | a | 22.97 | 13.86 | b | 36.02 | |||||||||
| 1953 | 16.07 | a | 20.39 | 28.03 | b | 33.87 | 39.81 | e | 55.53 | k | 60.68 | 54.90 | a | 49.00 | 38.39 | 27.93 | a | 15.45 | 34.96 | |||||||
| 1954 | 20.03 | 26.29 | 25.20 | a | 38.37 | 48.06 | 52.43 | 61.00 | 55.52 | 50.11 | b | 38.93 | a | 29.60 | 14.10 | b | 38.30 | |||||||||
| 1955 | 4.37 | d | 3.89 | 23.06 | 32.23 | 43.14 | b | 50.57 | 58.03 | a | 59.52 | 49.50 | 37.63 | a | 23.07 | a | 20.17 | b | 33.77 | |||||||
| 1956 | 21.37 | a | 15.79 | 27.26 | 36.97 | a | 46.61 | 55.46 | b | 59.39 | 54.23 | 50.60 | 37.32 | 18.39 | b | 13.13 | 36.38 | |||||||||
| 1957 | 13.59 | b | 22.48 | a | 28.78 | d | 34.78 | c | 41.75 | c | 52.68 | e | 57.75 | g | ----- | z | 43.20 | y | 35.94 | 22.03 | 15.26 | 29.70 | ||||
| 1958 | 14.32 | 24.93 | 24.00 | 29.87 | 42.03 | 47.57 | 50.29 | 54.81 | 44.23 | 33.58 | 20.90 | 17.29 | 33.65 | |||||||||||||
| 1959 | 13.26 | 20.29 | 22.71 | 30.23 | 37.68 | 49.47 | 54.29 | 52.03 | 44.67 | 33.23 | 21.47 | 16.48 | 32.98 | |||||||||||||
| 1960 | 4.58 | 8.83 | 24.87 | 33.00 | 39.00 | 47.67 | 54.39 | 50.19 | 46.80 | 35.29 | 25.27 | 14.61 | 32.04 | |||||||||||||
| 1961 | 10.16 | 17.68 | 24.32 | 28.83 | 38.39 | 50.00 | 55.29 | 55.26 | 39.83 | 32.26 | 21.13 | 12.74 | 32.16 | |||||||||||||
| 1962 | 10.97 | 23.14 | 22.13 | 35.17 | 37.77 | 48.00 | 52.26 | 49.81 | 43.69 | d | 35.39 | 27.40 | 14.19 | 33.33 | ||||||||||||
| 1963 | 3.23 | a | 23.61 | 21.32 | 29.60 | 42.16 | 46.30 | 54.19 | 54.32 | 47.67 | 38.81 | 25.17 | 10.13 | 33.04 | ||||||||||||
| 1964 | 8.42 | 12.34 | 16.03 | 30.27 | ----- | z | 47.43 | ----- | z | 50.81 | 41.97 | 33.35 | 17.73 | 10.81 | 26.92 | |||||||||||
| 1965 | 22.19 | ----- | z | 24.13 | ----- | z | ----- | z | 46.10 | 52.77 | 51.65 | 37.13 | 33.00 | 28.03 | 13.81 | 34.31 | ||||||||||
| 1966 | 7.88 | w | 13.82 | 24.23 | 30.00 | 39.00 | 43.27 | 53.26 | 49.42 | e | 40.84 | e | 33.65 | e | 25.37 | 14.61 | 33.41 | |||||||||
| 1967 | 7.90 | a | 17.68 | 24.55 | 25.17 | 36.94 | 45.70 | 56.00 | 51.94 | 45.64 | b | 32.03 | 28.11 | b | 5.00 | f | 33.79 | |||||||||
| 1968 | 0.53 | a | 19.68 | a | 26.17 | a | ----- | z | 36.00 | a | ----- | z | 56.87 | a | 52.77 | ----- | z | ----- | z | ----- | z | ----- | z | 32.00 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 8.95 | 17.09 | 25.24 | 32.78 | 41.19 | 49.02 | 55.96 | 53.92 | 45.54 | 34.99 | 22.91 | 13.80 | 33.97 | |||||||||||||
| S.D. | 6.53 | 6.72 | 2.69 | 4.38 | 3.35 | 2.97 | 3.04 | 2.94 | 4.02 | 2.94 | 3.43 | 4.79 | 2.20 | |||||||||||||
| SKEW | -0.33 | -1.05 | -0.61 | -0.51 | 0.48 | -0.02 | 0.36 | -0.11 | -0.23 | 0.25 | 0.01 | -0.47 | 0.45 | |||||||||||||
| MAX | 22.19 | 26.29 | 30.55 | 40.93 | 48.27 | 56.93 | 61.90 | 59.65 | 52.53 | 41.39 | 29.60 | 24.43 | 38.30 | |||||||||||||
| MIN | -9.19 | -2.79 | 16.03 | 18.00 | 36.00 | 40.37 | 50.29 | 47.48 | 37.13 | 28.36 | 15.23 | -2.23 | 30.44 | |||||||||||||
| NO YRS | 50 | 51 | 48 | 45 | 49 | 52 | 50 | 50 | 47 | 49 | 47 | 49 | 28 | |||||||||||||