| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1911 | ----- | z | ----- | z | ----- | 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 | 74.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.00 | j | ----- | z | |
| 1916 | 48.00 | 49.00 | 43.00 | 62.00 | 70.00 | 80.00 | 79.00 | 86.00 | a | 75.00 | 67.00 | 44.00 | 47.00 | 86.00 | a | |||||||||||
| 1917 | 43.00 | a | 42.00 | a | 40.00 | 43.00 | 60.00 | 74.00 | a | 83.00 | 81.00 | a | 78.00 | a | 76.00 | b | 64.00 | 45.00 | 83.00 | g | ||||||
| 1918 | 40.00 | a | 41.00 | 56.00 | a | 70.00 | 70.00 | ----- | z | 74.00 | a | 72.00 | c | 81.00 | a | 69.00 | 57.00 | b | 48.00 | ----- | z | |||||
| 1919 | 47.00 | 47.00 | 57.00 | a | 65.00 | 70.00 | a | 73.00 | x | 89.00 | b | 84.00 | a | ----- | z | 74.00 | a | 49.00 | p | ----- | z | ----- | z | |||
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.00 | a | 88.00 | c | 88.00 | a | 77.00 | a | 69.00 | b | 50.00 | 40.00 | ----- | z | ||
| 1921 | 40.00 | 48.00 | a | 49.00 | a | 56.00 | 70.00 | a | 78.00 | b | 80.00 | a | 85.00 | 70.00 | a | 75.00 | a | 53.00 | 49.00 | a | 85.00 | i | ||||
| 1922 | 38.00 | 36.00 | 39.00 | 51.00 | 76.00 | 83.00 | 89.00 | 85.00 | 81.00 | a | 61.00 | 45.00 | c | 52.00 | 89.00 | d | ||||||||||
| 1923 | 55.00 | b | 50.00 | c | 61.00 | j | 69.00 | i | 64.00 | b | 84.00 | c | 85.00 | c | 89.00 | 73.00 | 62.00 | 54.00 | a | 53.00 | ----- | z | ||||
| 1924 | 46.00 | 47.00 | 46.00 | 67.00 | a | 79.00 | a | 88.00 | b | 89.00 | a | 87.00 | b | 87.00 | d | 63.00 | b | 43.00 | b | 48.00 | d | 89.00 | s | |||
| 1925 | 48.00 | 44.00 | a | 50.00 | 67.00 | a | 74.00 | c | 92.00 | a | 87.00 | 86.00 | 78.00 | 71.00 | 47.00 | 48.00 | 92.00 | f | ||||||||
| 1926 | 46.00 | l | 51.00 | 63.00 | 79.00 | 72.00 | 88.00 | 91.00 | 85.00 | 75.00 | 65.00 | 62.00 | 52.00 | 91.00 | l | |||||||||||
| 1927 | 45.00 | 55.00 | 58.00 | 67.00 | 71.00 | 79.00 | 92.00 | 84.00 | 79.00 | 66.00 | 65.00 | 53.00 | 92.00 | |||||||||||||
| 1928 | 48.00 | a | 52.00 | 60.00 | 69.00 | 82.00 | 77.00 | 87.00 | 84.00 | 89.00 | 63.00 | 48.00 | ----- | z | ----- | z | ||||||||||
| 1929 | ----- | z | ----- | z | ----- | z | 61.00 | a | 73.00 | 79.00 | 83.00 | 83.00 | 87.00 | 73.00 | 55.00 | 46.00 | o | ----- | z | |||||||
| 1930 | ----- | z | ----- | z | ----- | z | 66.00 | 72.00 | 80.00 | 89.00 | 82.00 | 82.00 | 68.00 | 59.00 | 39.00 | ----- | z | |||||||||
| 1931 | 50.00 | 46.00 | 58.00 | 70.00 | 82.00 | 85.00 | 89.00 | 84.00 | 73.00 | 74.00 | 54.00 | 36.00 | 89.00 | |||||||||||||
| 1932 | 44.00 | 42.00 | 43.00 | 62.00 | 68.00 | 81.00 | 79.00 | 80.00 | 81.00 | 73.00 | 50.00 | 45.00 | 81.00 | |||||||||||||
| 1933 | 40.00 | 40.00 | 43.00 | 61.00 | 67.00 | 80.00 | 89.00 | 93.00 | 74.00 | 78.00 | 60.00 | 48.00 | 93.00 | |||||||||||||
| 1934 | 46.00 | 53.00 | 63.00 | 81.00 | 78.00 | p | 93.00 | e | 84.00 | j | 94.00 | e | 74.00 | h | 77.00 | l | 53.00 | 43.00 | b | ----- | z | |||||
| 1935 | 51.00 | b | 54.00 | 53.00 | 65.00 | 74.00 | 80.00 | a | 95.00 | ----- | z | 86.00 | a | 81.00 | a | 48.00 | 47.00 | a | ----- | z | ||||||
| 1936 | 41.00 | 48.00 | 56.00 | a | 71.00 | 84.00 | 78.00 | e | 86.00 | 93.00 | 73.00 | f | 88.00 | c | ----- | z | 43.00 | ----- | z | |||||||
| 1937 | 30.00 | b | 45.00 | 55.00 | 58.00 | 74.00 | 92.00 | 92.00 | b | 83.00 | a | 87.00 | 72.00 | 52.00 | c | 43.00 | 92.00 | h | ||||||||
| 1938 | 40.00 | c | 45.00 | 51.00 | b | 65.00 | 78.00 | a | 84.00 | 101.00 | 95.00 | 101.00 | 72.00 | a | 46.00 | c | 44.00 | b | 101.00 | l | ||||||
| 1939 | 40.00 | a | 44.00 | 62.00 | 68.00 | 82.00 | a | 81.00 | c | 89.00 | 89.00 | 84.00 | b | 71.00 | c | 55.00 | a | 52.00 | a | 89.00 | l | |||||
| 1940 | 47.00 | d | 42.00 | 64.00 | 62.00 | a | 76.00 | 88.00 | b | 80.00 | b | 90.00 | 86.00 | a | 70.00 | a | 42.00 | a | 40.00 | a | 90.00 | m | ||||
| 1941 | 43.00 | 50.00 | 64.00 | 71.00 | 81.00 | 85.00 | 98.00 | 87.00 | 71.00 | 67.00 | 55.00 | 46.00 | 98.00 | |||||||||||||
| 1942 | 38.00 | 43.00 | 59.00 | 70.00 | 72.00 | 87.00 | 96.00 | 94.00 | 89.00 | 78.00 | 43.00 | 42.00 | 96.00 | |||||||||||||
| 1943 | 41.00 | 53.00 | b | 54.00 | a | 71.00 | 73.00 | 83.00 | 87.00 | g | 86.00 | b | 86.00 | b | 84.00 | c | 52.00 | 41.00 | a | 87.00 | r | |||||
| 1944 | 45.00 | 46.00 | 59.00 | 67.00 | 81.00 | 81.00 | 91.00 | 85.00 | a | 89.00 | 75.00 | 51.00 | 44.00 | 91.00 | a | |||||||||||
| 1945 | 47.00 | 50.00 | a | 55.00 | ----- | z | 79.00 | 79.00 | c | 84.00 | n | ----- | z | 74.00 | n | 78.00 | l | 51.00 | l | ----- | z | ----- | z | |||
| 1946 | 47.00 | h | 45.00 | d | 54.00 | d | 75.00 | i | 78.00 | e | 77.00 | d | 92.00 | d | 85.00 | q | 79.00 | e | 61.00 | e | 48.00 | f | 42.00 | g | ----- | z |
| 1947 | ----- | z | 54.00 | i | 67.00 | d | 73.00 | g | 79.00 | m | 72.00 | e | 87.00 | f | 77.00 | j | 82.00 | e | 76.00 | f | 50.00 | f | 41.00 | b | ----- | z |
| 1948 | 44.00 | e | 50.00 | g | 60.00 | i | 62.00 | f | 74.00 | j | 85.00 | e | 85.00 | h | 78.00 | h | 84.00 | e | 65.00 | h | 47.00 | f | 38.00 | g | ----- | z |
| 1949 | 41.00 | j | 50.00 | j | 57.00 | k | 65.00 | l | 74.00 | g | 78.00 | d | 82.00 | h | 82.00 | g | 81.00 | j | 64.00 | h | 60.00 | h | 45.00 | i | ----- | z |
| 1950 | 42.00 | n | 42.00 | g | 46.00 | l | 58.00 | l | 71.00 | i | 80.00 | j | 83.00 | h | 86.00 | l | 86.00 | i | 60.00 | g | 58.00 | g | 46.00 | j | ----- | z |
| 1951 | 44.00 | d | 50.00 | j | 59.00 | l | 74.00 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.00 | i | 53.00 | 37.00 | ----- | z | ||
| 1953 | 48.00 | 45.00 | 55.00 | a | 61.00 | b | 74.00 | 69.00 | 88.00 | h | 87.00 | j | 85.00 | m | 70.00 | f | 47.00 | a | 39.00 | ----- | z | |||||
| 1954 | 39.00 | 43.00 | 50.00 | 53.00 | o | 74.00 | l | 74.00 | 81.00 | a | 76.00 | a | 78.00 | a | 61.00 | 55.00 | k | 40.00 | d | ----- | z | |||||
| 1955 | 42.00 | h | 46.00 | b | 48.00 | b | 60.00 | b | 65.00 | 79.00 | 82.00 | a | 86.00 | 90.00 | 67.00 | a | 52.00 | 43.00 | 90.00 | p | ||||||
| 1956 | 36.00 | 45.00 | 55.00 | 69.00 | b | 80.00 | 71.00 | 98.00 | 90.00 | 74.00 | 71.00 | 48.00 | 51.00 | 98.00 | b | |||||||||||
| 1957 | 35.00 | a | 50.00 | 51.00 | 75.00 | 79.00 | 78.00 | a | 75.00 | 73.00 | i | 86.00 | 66.00 | 55.00 | 53.00 | b | 86.00 | m | ||||||||
| 1958 | 43.00 | 61.00 | a | 49.00 | h | 64.00 | 84.00 | 85.00 | a | 91.00 | 90.00 | 88.00 | 72.00 | a | 54.00 | 50.00 | a | 91.00 | l | |||||||
| 1959 | 42.00 | 43.00 | 55.00 | 76.00 | 75.00 | 88.00 | 89.00 | a | 85.00 | 75.00 | 64.00 | 60.00 | b | 48.00 | a | 89.00 | d | |||||||||
| 1960 | 47.00 | 44.00 | 66.00 | 70.00 | 65.00 | 77.00 | 95.00 | 89.00 | 82.00 | 74.00 | 50.00 | 43.00 | 95.00 | |||||||||||||
| 1961 | 46.00 | 43.00 | a | 53.00 | 57.00 | 75.00 | 94.00 | 90.00 | 98.00 | 75.00 | 70.00 | 52.00 | 43.00 | 98.00 | a | |||||||||||
| 1962 | 56.00 | 56.00 | 65.00 | 66.00 | 58.00 | b | 80.00 | 81.00 | a | 78.00 | 80.00 | 67.00 | 57.00 | 46.00 | 81.00 | c | ||||||||||
| 1963 | 44.00 | 56.00 | 57.00 | 60.00 | 80.00 | 81.00 | 75.00 | 89.00 | 89.00 | a | 69.00 | 45.00 | 46.00 | 89.00 | a | |||||||||||
| 1964 | 48.00 | 51.00 | 58.00 | a | 56.00 | 71.00 | 72.00 | 84.00 | 82.00 | 73.00 | 72.00 | a | 47.00 | 40.00 | 84.00 | b | ||||||||||
| 1965 | 50.00 | a | 54.00 | 59.00 | 66.00 | 72.00 | 78.00 | 92.00 | a | 92.00 | a | 75.00 | 69.00 | 53.00 | 46.00 | 92.00 | c | |||||||||
| 1966 | 49.00 | 48.00 | 64.00 | 65.00 | a | 77.00 | 77.00 | 75.00 | 87.00 | 86.00 | 72.00 | b | 54.00 | 52.00 | 87.00 | c | ||||||||||
| 1967 | 41.00 | 47.00 | 46.00 | a | 56.00 | 75.00 | a | 87.00 | 85.00 | 90.00 | 85.00 | 64.00 | 47.00 | b | 50.00 | 90.00 | d | |||||||||
| 1968 | 50.00 | 57.00 | a | 56.00 | 70.00 | 75.00 | 83.00 | 88.00 | 82.00 | 80.00 | a | ----- | z | 55.00 | b | 40.00 | a | ----- | z | |||||||
| 1969 | 44.00 | 44.00 | 60.00 | 58.00 | d | 78.00 | b | 87.00 | 79.00 | 76.00 | 83.00 | 66.00 | 60.00 | a | 42.00 | 87.00 | g | |||||||||
| 1970 | 40.00 | c | 54.00 | 53.00 | 52.00 | 73.00 | c | 87.00 | a | 90.00 | b | 84.00 | a | 77.00 | a | 79.00 | 57.00 | b | 39.00 | 90.00 | m | |||||
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.00 | e | 39.00 | b | ----- | z |
| 1972 | 42.00 | d | 45.00 | g | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 44.11 | 47.72 | 54.93 | 64.89 | 74.09 | 81.52 | 86.93 | 86.09 | 81.30 | 70.42 | 52.17 | 45.02 | 90.42 | |||||||||||||
| S.D. | 5.05 | 5.21 | 7.03 | 7.43 | 5.97 | 5.75 | 6.54 | 5.30 | 6.35 | 6.05 | 5.65 | 4.75 | 5.24 | |||||||||||||
| SKEW | -0.13 | 0.35 | -0.43 | -0.41 | -0.56 | 0.14 | -0.16 | -0.23 | 0.44 | 0.63 | 0.23 | 0.12 | -0.19 | |||||||||||||
| MAX | 56.00 | 61.00 | 67.00 | 81.00 | 84.00 | 94.00 | 101.00 | 98.00 | 101.00 | 88.00 | 65.00 | 53.00 | 98.00 | |||||||||||||
| MIN | 30.00 | 36.00 | 39.00 | 43.00 | 58.00 | 69.00 | 74.00 | 72.00 | 70.00 | 61.00 | 42.00 | 36.00 | 81.00 | |||||||||||||
| YRS | 46 | 46 | 45 | 45 | 46 | 50 | 45 | 44 | 46 | 45 | 46 | 47 | 19 | |||||||||||||