| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1896 | ----- | z | ----- | z | 52.00 | 50.00 | 76.00 | 86.00 | g | 87.00 | 83.00 | 75.00 | 66.00 | 55.00 | 50.00 | b | ----- | z | ||||||||
| 1897 | 48.00 | a | 49.00 | c | 45.00 | a | 66.00 | 74.00 | 78.00 | 89.00 | 82.00 | 74.00 | c | 68.00 | ----- | z | ----- | z | ----- | z | ||||||
| 1898 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.00 | d | 47.00 | ----- | z | |
| 1900 | 47.00 | 46.00 | 60.00 | a | 67.00 | 78.00 | 91.00 | 90.00 | 86.00 | 83.00 | 64.00 | 57.00 | 47.00 | 91.00 | a | |||||||||||
| 1901 | 48.00 | 50.00 | 57.00 | 68.00 | 75.00 | 88.00 | a | 96.00 | a | 92.00 | 81.00 | 82.00 | d | 54.00 | j | 51.00 | 96.00 | p | ||||||||
| 1902 | 48.00 | 52.00 | 43.00 | 70.00 | a | 73.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||
| 1903 | 49.00 | a | 42.00 | 62.00 | 80.00 | a | 91.00 | 101.00 | 98.00 | a | ----- | z | 91.00 | 74.00 | 64.00 | 50.00 | ----- | z | ||||||||
| 1904 | 46.00 | h | 55.00 | 59.00 | 80.00 | b | 84.00 | ----- | z | ----- | z | ----- | z | 81.00 | g | ----- | z | ----- | z | 43.00 | r | ----- | z | |||
| 1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1906 | 44.00 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.00 | c | 54.00 | ----- | z | |
| 1907 | 41.00 | 53.00 | ----- | z | 71.00 | 77.00 | a | 77.00 | 92.00 | 85.00 | 80.00 | 75.00 | 60.00 | e | 48.00 | a | ----- | z | ||||||||
| 1908 | 40.00 | a | 50.00 | e | 55.00 | 70.00 | e | 70.00 | h | 77.00 | b | 83.00 | a | 86.00 | a | 74.00 | b | 70.00 | a | 55.00 | ----- | z | ----- | z | ||
| 1909 | 49.00 | g | ----- | z | ----- | z | ----- | z | 57.00 | a | 95.00 | a | 99.00 | i | 92.00 | b | 89.00 | 80.00 | b | 66.00 | h | 53.00 | c | ----- | z | |
| 1910 | 64.00 | a | 56.00 | a | 71.00 | 86.00 | a | ----- | z | ----- | z | ----- | z | 87.00 | u | 84.00 | 80.00 | 57.00 | b | ----- | z | ----- | z | |||
| 1911 | 47.00 | 42.00 | 58.00 | 65.00 | 75.00 | 85.00 | 88.00 | 90.00 | 84.00 | 78.00 | 48.00 | a | 49.00 | a | 90.00 | b | ||||||||||
| 1912 | 46.00 | a | 44.00 | a | 48.00 | 59.00 | b | 76.00 | b | 87.00 | a | 89.00 | 88.00 | 84.00 | 68.00 | a | 69.00 | a | 56.00 | 89.00 | i | |||||
| 1913 | 56.00 | g | 62.00 | i | ----- | z | 68.00 | 82.00 | 78.00 | d | 86.00 | a | 81.00 | a | 83.00 | m | ----- | z | 43.00 | w | 42.00 | b | ----- | z | ||
| 1914 | 51.00 | 41.00 | a | 55.00 | 78.00 | a | 81.00 | 83.00 | 86.00 | d | 86.00 | e | 82.00 | 72.00 | 67.00 | 39.00 | 86.00 | k | ||||||||
| 1915 | 44.00 | 43.00 | a | 54.00 | 70.00 | 72.00 | 85.00 | 89.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.00 | b | 84.00 | a | 82.00 | 65.00 | 64.00 | 45.00 | ----- | z | ||||
| 1917 | 48.00 | a | 44.00 | 54.00 | 63.00 | 72.00 | 83.00 | 86.00 | 83.00 | 82.00 | 79.00 | a | 65.00 | b | 51.00 | 86.00 | d | |||||||||
| 1918 | 52.00 | d | 48.00 | d | 60.00 | a | 64.00 | 76.00 | 90.00 | g | 87.00 | c | 86.00 | b | 80.00 | a | 75.00 | a | 64.00 | c | 53.00 | c | ----- | z | ||
| 1919 | 50.00 | a | 45.00 | a | 59.00 | b | 72.00 | b | 79.00 | e | 85.00 | k | ----- | z | 87.00 | h | 80.00 | k | 65.00 | d | 55.00 | c | 51.00 | a | ----- | z |
| 1920 | 54.00 | t | ----- | z | ----- | z | ----- | z | 78.00 | 82.00 | 93.00 | 86.00 | a | 80.00 | a | 70.00 | 50.00 | 42.00 | ----- | z | ||||||
| 1921 | 46.00 | 47.00 | 53.00 | 59.00 | 75.00 | 91.00 | 92.00 | 85.00 | 73.00 | 72.00 | 58.00 | 51.00 | 92.00 | |||||||||||||
| 1922 | 44.00 | 42.00 | 51.00 | a | 56.00 | 80.00 | a | 93.00 | 94.00 | 85.00 | 78.00 | 78.00 | b | 45.00 | 36.00 | 94.00 | d | |||||||||
| 1923 | 42.00 | 34.00 | b | 39.00 | 51.00 | a | 72.00 | 82.00 | 86.00 | 82.00 | 80.00 | 58.00 | 47.00 | 42.00 | 86.00 | c | ||||||||||
| 1924 | 36.00 | a | 43.00 | 44.00 | 59.00 | 76.00 | 89.00 | 93.00 | 90.00 | 86.00 | 63.00 | b | 63.00 | 48.00 | 93.00 | c | ||||||||||
| 1925 | 44.00 | 47.00 | 56.00 | 69.00 | a | 82.00 | 90.00 | a | 97.00 | 86.00 | 75.00 | 68.00 | 54.00 | 44.00 | 97.00 | b | ||||||||||
| 1926 | 42.00 | 47.00 | 55.00 | 70.00 | 79.00 | 91.00 | 94.00 | 90.00 | 78.00 | 70.00 | 58.00 | 50.00 | 94.00 | |||||||||||||
| 1927 | 51.00 | 46.00 | 49.00 | 75.00 | 86.00 | 89.00 | 90.00 | 88.00 | 79.00 | 70.00 | a | 57.00 | 44.00 | r | 90.00 | s | ||||||||||
| 1928 | 50.00 | 45.00 | 60.00 | 75.00 | 80.00 | 88.00 | f | 90.00 | l | 90.00 | f | 88.00 | 70.00 | 55.00 | 52.00 | 90.00 | x | |||||||||
| 1929 | 40.00 | e | 40.00 | b | 52.00 | b | 65.00 | 80.00 | 92.00 | 92.00 | 90.00 | 80.00 | 70.00 | a | 58.00 | 50.00 | 92.00 | j | ||||||||
| 1930 | 40.00 | c | 51.00 | 58.00 | 74.00 | 80.00 | 89.00 | k | 88.00 | p | 84.00 | a | 79.00 | 65.00 | a | 64.00 | 46.00 | a | ----- | z | ||||||
| 1931 | 50.00 | 52.00 | 60.00 | 67.00 | 80.00 | c | 87.00 | 100.00 | 91.00 | a | 87.00 | b | 75.00 | d | 70.00 | c | 49.00 | a | 100.00 | n | ||||||
| 1932 | 41.00 | c | 48.00 | c | 47.00 | d | 68.00 | c | ----- | z | ----- | z | 93.00 | a | 90.00 | a | 85.00 | 73.00 | b | 62.00 | a | 48.00 | a | ----- | z | |
| 1933 | 43.00 | c | 47.00 | d | 57.00 | b | 63.00 | b | 80.00 | b | 88.00 | 94.00 | 93.00 | c | 84.00 | c | 75.00 | a | 60.00 | d | 54.00 | b | ----- | z | ||
| 1934 | 43.00 | b | 53.00 | 63.00 | a | 76.00 | 83.00 | c | 86.00 | c | 94.00 | 92.00 | a | 83.00 | a | 76.00 | e | 65.00 | f | 46.00 | a | 94.00 | w | |||
| 1935 | 48.00 | b | 54.00 | b | 55.00 | c | 65.00 | c | 73.00 | a | 86.00 | a | 93.00 | 91.00 | 84.00 | b | 75.00 | c | 48.00 | b | 45.00 | b | 93.00 | u | ||
| 1936 | 45.00 | d | 42.00 | b | 52.00 | b | 70.00 | b | 80.00 | 93.00 | a | 93.00 | 90.00 | 81.00 | 74.00 | 59.00 | 48.00 | 93.00 | k | |||||||
| 1937 | 31.00 | e | 46.00 | 49.00 | d | 69.00 | d | 80.00 | g | 91.00 | a | 92.00 | a | 92.00 | 85.00 | 69.00 | b | 60.00 | c | 51.00 | a | ----- | z | |||
| 1938 | 55.00 | b | 49.00 | a | 52.00 | c | 75.00 | a | 84.00 | a | 91.00 | a | 92.00 | 92.00 | 83.00 | 73.00 | 50.00 | g | 46.00 | a | 92.00 | q | ||||
| 1939 | 47.00 | b | 38.00 | a | 56.00 | b | 74.00 | c | 82.00 | b | 86.00 | b | 94.00 | 90.00 | 80.00 | 67.00 | b | 60.00 | 62.00 | a | 94.00 | o | ||||
| 1940 | 44.00 | 50.00 | 61.00 | b | 68.00 | d | 79.00 | 94.00 | 93.00 | 95.00 | 84.00 | a | 73.00 | 53.00 | d | 57.00 | 95.00 | k | ||||||||
| 1941 | 46.00 | b | 49.00 | a | 55.00 | 62.00 | 79.00 | c | 86.00 | 91.00 | a | 86.00 | a | 78.00 | b | 65.00 | c | 63.00 | a | 57.00 | d | 91.00 | r | |||
| 1942 | 47.00 | c | 45.00 | a | 55.00 | 68.00 | a | 78.00 | 83.00 | a | 91.00 | 89.00 | 84.00 | 74.00 | a | 60.00 | c | 48.00 | 91.00 | j | ||||||
| 1943 | 46.00 | d | 48.00 | b | 63.00 | c | 73.00 | 81.00 | 84.00 | b | 92.00 | 88.00 | a | 82.00 | 74.00 | a | 60.00 | a | 48.00 | b | 92.00 | p | ||||
| 1944 | 43.00 | 46.00 | 48.00 | c | 59.00 | 76.00 | 85.00 | 87.00 | 86.00 | 84.00 | b | 75.00 | a | 60.00 | d | 47.00 | 87.00 | j | ||||||||
| 1945 | 48.00 | a | 43.00 | 58.00 | d | 70.00 | c | 74.00 | a | 83.00 | a | 90.00 | 93.00 | 87.00 | a | 73.00 | c | 59.00 | f | 44.00 | b | 93.00 | v | |||
| 1946 | 47.00 | e | 50.00 | 71.00 | a | 82.00 | 82.00 | 86.00 | 92.00 | a | 92.00 | 86.00 | b | 75.00 | b | 55.00 | b | 58.00 | b | 92.00 | o | |||||
| 1947 | 56.00 | c | 55.00 | 62.00 | a | 72.00 | b | 82.00 | b | 82.00 | b | 90.00 | 85.00 | a | 86.00 | c | 77.00 | c | 66.00 | b | 47.00 | a | 90.00 | t | ||
| 1948 | 55.00 | f | 51.00 | d | 51.00 | c | 81.00 | c | 85.00 | b | 85.00 | j | 88.00 | a | ----- | z | 87.00 | 80.00 | 55.00 | p | 46.00 | ----- | z | |||
| 1949 | 38.00 | c | ----- | z | ----- | z | 74.00 | e | 79.00 | 81.00 | f | 91.00 | d | 90.00 | e | 82.00 | f | 77.00 | e | 65.00 | c | 53.00 | c | ----- | z | |
| 1950 | 51.00 | k | 53.00 | g | 57.00 | j | ----- | z | 74.00 | 85.00 | 88.00 | 88.00 | 89.00 | 78.00 | h | 62.00 | k | 54.00 | l | ----- | z | |||||
| 1951 | ----- | z | 57.00 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.00 | w | 86.00 | 74.00 | 62.00 | 46.00 | ----- | z | ||||
| 1952 | 42.00 | 45.00 | 48.00 | a | 72.00 | 75.00 | 84.00 | 89.00 | 87.00 | b | 84.00 | c | 77.00 | 60.00 | a | 50.00 | t | ----- | z | |||||||
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | 74.00 | v | 87.00 | o | 93.00 | e | 90.00 | d | 86.00 | f | 69.00 | e | 56.00 | 47.00 | a | ----- | z | |
| 1983 | 53.00 | a | 50.00 | b | 55.00 | 63.00 | b | 84.00 | c | 84.00 | a | 91.00 | b | 89.00 | 85.00 | b | 69.00 | a | 65.00 | a | 42.00 | c | 91.00 | r | ||
| 1984 | 46.00 | 48.00 | a | 49.00 | b | 70.00 | 87.00 | b | 92.00 | a | 90.00 | b | 87.00 | b | 82.00 | b | ----- | z | ----- | z | ----- | z | ----- | z | ||
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | 76.00 | c | 87.00 | a | 89.00 | b | 89.00 | c | 83.00 | f | 77.00 | e | 62.00 | b | 43.00 | ----- | z | |
| 1986 | 55.00 | a | 57.00 | b | 66.00 | b | 69.00 | d | 76.00 | c | 87.00 | e | 86.00 | a | 88.00 | b | 77.00 | b | 67.00 | a | 58.00 | a | 47.00 | d | ----- | z |
| 1987 | ----- | z | 49.00 | d | 57.00 | e | 74.00 | e | 75.00 | a | 84.00 | d | 87.00 | e | 85.00 | a | 83.00 | b | 75.00 | d | 60.00 | b | 55.00 | b | ----- | z |
| 1988 | 52.00 | a | 53.00 | a | 61.00 | c | 71.00 | c | 77.00 | h | 89.00 | e | 92.00 | d | 89.00 | d | 84.00 | g | 73.00 | i | 56.00 | i | 49.00 | c | ----- | z |
| 1989 | 48.00 | b | 53.00 | 64.00 | b | 73.00 | a | 77.00 | d | 86.00 | b | 92.00 | a | 83.00 | e | 81.00 | m | 76.00 | a | 63.00 | d | 49.00 | e | ----- | z | |
| 1990 | 51.00 | b | 47.00 | c | 60.00 | b | 69.00 | c | 73.00 | c | 89.00 | q | 88.00 | t | 90.00 | f | 87.00 | 73.00 | b | 62.00 | p | 52.00 | e | ----- | z | |
| 1991 | 37.00 | a | 53.00 | 48.00 | d | 69.00 | t | 74.00 | a | 80.00 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.27 | 47.60 | 55.32 | 69.04 | 78.07 | 86.58 | 90.81 | 87.88 | 82.38 | 72.22 | 59.27 | 48.72 | 91.44 | |||||||||||||
| S.D. | 5.64 | 4.78 | 6.60 | 7.15 | 5.07 | 4.91 | 3.34 | 3.31 | 4.11 | 5.02 | 5.77 | 4.87 | 3.68 | |||||||||||||
| SKEW | 0.18 | -0.30 | 0.01 | -0.34 | -0.87 | 0.27 | 0.22 | -0.10 | -0.37 | -0.42 | -0.38 | 0.12 | -0.31 | |||||||||||||
| MAX | 64.00 | 57.00 | 71.00 | 86.00 | 91.00 | 101.00 | 100.00 | 95.00 | 91.00 | 82.00 | 71.00 | 62.00 | 97.00 | |||||||||||||
| MIN | 31.00 | 34.00 | 39.00 | 50.00 | 57.00 | 77.00 | 83.00 | 81.00 | 73.00 | 58.00 | 45.00 | 36.00 | 86.00 | |||||||||||||
| YRS | 51 | 53 | 53 | 55 | 55 | 48 | 53 | 52 | 52 | 55 | 49 | 54 | 9 | |||||||||||||