| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1897 | 66.00 | 61.00 | 64.00 | 77.00 | 82.00 | 89.00 | 94.00 | 93.00 | 89.00 | 79.00 | 78.00 | 65.00 | 94.00 | |||||||||||||
| 1898 | 65.00 | 69.00 | 65.00 | 82.00 | 82.00 | 100.00 | 99.00 | 96.00 | 90.00 | 84.00 | 81.00 | 59.00 | 100.00 | |||||||||||||
| 1899 | 59.00 | 60.00 | 69.00 | 75.00 | 81.00 | 94.00 | 92.00 | 93.00 | 92.00 | 83.00 | 76.00 | 65.00 | 94.00 | |||||||||||||
| 1900 | 66.00 | 65.00 | 78.00 | 75.00 | 87.00 | h | 99.00 | n | 98.00 | a | 96.00 | 89.00 | 84.00 | 80.00 | 69.00 | 99.00 | w | |||||||||
| 1901 | 68.00 | 65.00 | 74.00 | 77.00 | 82.00 | a | 99.00 | 98.00 | a | 95.00 | a | 90.00 | 87.00 | 73.00 | 69.00 | a | 99.00 | d | ||||||||
| 1902 | 68.00 | 60.00 | b | 60.00 | b | 78.00 | 85.00 | a | 94.00 | 91.00 | 95.00 | 87.00 | 77.00 | 68.00 | 62.00 | 95.00 | e | |||||||||
| 1903 | 53.00 | 69.00 | a | 64.00 | 73.00 | 78.00 | 89.00 | 89.00 | b | 89.00 | 84.00 | 78.00 | a | 73.00 | 60.00 | b | 89.00 | f | ||||||||
| 1904 | 61.00 | 70.00 | b | 75.00 | 78.00 | 82.00 | 86.00 | 91.00 | 85.00 | 81.00 | 78.00 | 68.00 | 60.00 | 91.00 | b | |||||||||||
| 1905 | 57.00 | 60.00 | 67.00 | 74.00 | 82.00 | 87.00 | 87.00 | 89.00 | 84.00 | 76.00 | 62.00 | 55.00 | 89.00 | |||||||||||||
| 1906 | 57.00 | 62.00 | 64.00 | 72.00 | 80.00 | 89.00 | 91.00 | 86.00 | 83.00 | 78.00 | 70.00 | a | 60.00 | 91.00 | a | |||||||||||
| 1907 | 54.00 | 67.00 | 78.00 | 78.00 | a | 77.00 | 88.00 | 91.00 | 87.00 | 82.00 | 74.00 | 66.00 | 58.00 | a | 91.00 | b | ||||||||||
| 1908 | 57.00 | 67.00 | 72.00 | a | 73.00 | 77.00 | 84.00 | 87.00 | 87.00 | 87.00 | 76.00 | a | 70.00 | 58.00 | 87.00 | b | ||||||||||
| 1909 | 61.00 | g | 53.00 | 61.00 | 73.00 | 76.00 | 88.00 | 92.00 | 85.00 | a | 82.00 | 79.00 | 71.00 | a | 51.00 | 92.00 | i | |||||||||
| 1910 | 58.00 | 60.00 | 81.00 | 78.00 | 88.00 | 89.00 | 92.00 | 93.00 | 92.00 | 84.00 | a | 70.00 | 64.00 | 93.00 | a | |||||||||||
| 1911 | 68.00 | 60.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.00 | b | ----- | z |
| 1940 | 57.00 | a | 64.00 | 69.00 | c | 73.00 | 82.00 | 93.00 | 92.00 | 91.00 | 84.00 | 75.00 | a | 67.00 | 63.00 | 93.00 | e | |||||||||
| 1941 | 52.00 | 60.00 | 64.00 | 68.00 | a | 83.00 | a | 85.00 | a | 86.00 | 88.00 | 84.00 | 72.00 | 65.00 | 61.00 | 88.00 | c | |||||||||
| 1942 | 59.00 | 56.00 | 61.00 | 72.00 | 81.00 | 87.00 | 91.00 | 86.00 | 85.00 | 76.00 | 68.00 | b | 63.00 | 91.00 | b | |||||||||||
| 1943 | 60.00 | 65.00 | 73.00 | 83.00 | 83.00 | 87.00 | 92.00 | 86.00 | 83.00 | 75.00 | 66.00 | 58.00 | 92.00 | |||||||||||||
| 1944 | 53.00 | 58.00 | 61.00 | 68.00 | 80.00 | 89.00 | 88.00 | 90.00 | 85.00 | m | 77.00 | ----- | z | ----- | z | ----- | z | |||||||||
| 1945 | 54.00 | 65.00 | 67.00 | 78.00 | a | 80.00 | 90.00 | 92.00 | 89.00 | 90.00 | 77.00 | 70.00 | 54.00 | 92.00 | a | |||||||||||
| 1946 | 53.00 | 61.00 | 72.00 | 76.00 | 80.00 | a | 90.00 | 90.00 | 88.00 | 84.00 | 72.00 | 64.00 | 66.00 | 90.00 | a | |||||||||||
| 1947 | 56.00 | 63.00 | a | 72.00 | 74.00 | b | 89.00 | 88.00 | 90.00 | 88.00 | a | 85.00 | 78.00 | 63.00 | a | 54.00 | 90.00 | e | ||||||||
| 1948 | 59.00 | 57.00 | 62.00 | d | 78.00 | a | 84.00 | a | 88.00 | a | 92.00 | 88.00 | c | 90.00 | 75.00 | 62.00 | 59.00 | a | 92.00 | k | ||||||
| 1949 | 50.00 | a | 55.00 | 66.00 | d | 79.00 | 83.00 | 88.00 | 90.00 | 88.00 | d | 88.00 | c | 79.00 | 73.00 | 59.00 | c | 90.00 | o | |||||||
| 1950 | 61.00 | b | 63.00 | b | 69.00 | a | 75.00 | 85.00 | a | 92.00 | 91.00 | 92.00 | 90.00 | 85.00 | 68.00 | 63.00 | 92.00 | f | ||||||||
| 1951 | 56.00 | a | 62.00 | 65.00 | 72.00 | 90.00 | 92.00 | c | 95.00 | 94.00 | 89.00 | 75.00 | 61.00 | 61.00 | 95.00 | d | ||||||||||
| 1952 | 56.00 | a | 59.00 | 57.00 | 73.00 | 82.00 | 90.00 | b | 93.00 | 92.00 | a | 90.00 | 79.00 | a | 74.00 | a | 51.00 | 93.00 | f | |||||||
| 1953 | 60.00 | a | 62.00 | 78.00 | 73.00 | 83.00 | a | 96.00 | 95.00 | 90.00 | b | 88.00 | 81.00 | a | 69.00 | 62.00 | 96.00 | e | ||||||||
| 1954 | 58.00 | 66.00 | 68.00 | 81.00 | 82.00 | 95.00 | 91.00 | 92.00 | 88.00 | a | 76.00 | 68.00 | 62.00 | 95.00 | a | |||||||||||
| 1955 | 52.00 | 58.00 | 65.00 | 75.00 | a | 80.00 | a | 92.00 | 91.00 | 86.00 | 88.00 | c | 78.00 | 66.00 | 60.00 | 92.00 | e | |||||||||
| 1956 | 62.00 | b | 58.00 | b | 73.00 | 71.00 | a | 86.00 | 90.00 | e | 92.00 | a | 89.00 | a | 87.00 | 78.00 | 65.00 | 61.00 | 92.00 | l | ||||||
| 1957 | 53.00 | a | 66.00 | 66.00 | 70.00 | 80.00 | 92.00 | 94.00 | 86.00 | 84.00 | 80.00 | 60.00 | b | 56.00 | b | 94.00 | e | |||||||||
| 1958 | 55.00 | 64.00 | 60.00 | 73.00 | 88.00 | 90.00 | a | 96.00 | e | 92.00 | 87.00 | 74.00 | 67.00 | 63.00 | 96.00 | f | ||||||||||
| 1959 | 57.00 | 55.00 | 62.00 | 75.00 | 85.00 | 90.00 | b | 92.00 | 88.00 | a | 87.00 | 78.00 | 61.00 | 59.00 | 92.00 | c | ||||||||||
| 1960 | 55.00 | 54.00 | 68.00 | 81.00 | 84.00 | 94.00 | 94.00 | 93.00 | 86.00 | 77.00 | 67.00 | 67.00 | a | 94.00 | a | |||||||||||
| 1961 | 55.00 | 66.00 | 65.00 | 75.00 | 81.00 | b | 94.00 | 93.00 | a | 90.00 | 80.00 | 75.00 | 58.00 | 56.00 | 94.00 | c | ||||||||||
| 1962 | 49.00 | 62.00 | 65.00 | 79.00 | 82.00 | 89.00 | 89.00 | 92.00 | 88.00 | 75.00 | 67.00 | 57.00 | 92.00 | |||||||||||||
| 1963 | 48.00 | a | 64.00 | a | 69.00 | 72.00 | b | 90.00 | 92.00 | 92.00 | 87.00 | 84.00 | 81.00 | 66.00 | 56.00 | 92.00 | d | |||||||||
| 1964 | 55.00 | 55.00 | 66.00 | 74.00 | 85.00 | 87.00 | 92.00 | 88.00 | b | 83.00 | 79.00 | 68.00 | 55.00 | 92.00 | b | |||||||||||
| 1965 | 60.00 | 61.00 | 57.00 | a | 79.00 | 78.00 | 87.00 | 90.00 | ----- | z | 79.00 | 78.00 | a | 69.00 | 61.00 | ----- | z | |||||||||
| 1966 | 51.00 | 53.00 | 65.00 | 73.00 | 83.00 | 89.00 | 93.00 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 57.39 | 61.43 | 67.24 | 75.20 | 82.53 | 90.30 | 91.88 | 89.79 | 86.23 | 78.05 | 68.15 | 60.23 | 92.52 | |||||||||||||
| S.D. | 5.15 | 4.46 | 5.82 | 3.55 | 3.39 | 3.51 | 2.83 | 3.17 | 3.31 | 3.46 | 5.20 | 4.44 | 3.01 | |||||||||||||
| SKEW | 0.50 | -0.12 | 0.48 | 0.18 | 0.42 | 0.82 | 0.47 | 0.35 | -0.22 | 0.68 | 0.51 | -0.03 | 0.68 | |||||||||||||
| MAX | 68.00 | 70.00 | 81.00 | 83.00 | 90.00 | 100.00 | 99.00 | 96.00 | 92.00 | 87.00 | 81.00 | 69.00 | 100.00 | |||||||||||||
| MIN | 48.00 | 53.00 | 57.00 | 68.00 | 76.00 | 84.00 | 86.00 | 85.00 | 79.00 | 72.00 | 58.00 | 51.00 | 87.00 | |||||||||||||
| YRS | 41 | 42 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 40 | 39 | 40 | 23 | |||||||||||||