YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | 41.95 | b | 39.13 | a | 48.34 | 52.82 | 61.66 | 68.73 | 75.32 | 76.95 | 71.35 | 64.94 | 51.45 | 46.84 | 58.29 | |||||||||||
1956 | 47.61 | 41.63 | b | 52.77 | 57.91 | a | 66.27 | 75.40 | 78.73 | 75.97 | 74.22 | 60.05 | 48.84 | a | 43.58 | 60.25 | ||||||||||
1957 | 44.76 | 52.57 | 52.22 | a | 55.65 | 60.22 | a | 75.72 | 81.53 | 78.42 | 72.42 | 60.19 | 45.98 | 46.55 | 60.52 | |||||||||||
1958 | 43.39 | 47.95 | 45.50 | 54.73 | 69.29 | 75.28 | 80.68 | a | 81.26 | 73.02 | 63.10 | 50.17 | 48.65 | 61.08 | ||||||||||||
1959 | 45.13 | 43.70 | a | 51.76 | 61.53 | 63.78 | a | 77.63 | 83.66 | 76.55 | 69.62 | 62.50 | 51.18 | 45.44 | 61.04 | |||||||||||
1960 | 38.87 | 41.12 | a | 53.02 | 57.63 | 64.79 | 76.83 | 80.65 | 79.52 | 74.75 | 59.79 | 49.82 | 42.65 | 59.95 | ||||||||||||
1961 | 45.33 | a | 46.98 | 49.26 | 57.92 | 63.85 | 77.48 | 80.68 | c | 77.71 | 68.70 | 59.16 | 47.13 | 42.05 | 59.69 | |||||||||||
1962 | 41.87 | 45.77 | 44.74 | 60.91 | a | 61.58 | 72.03 | 78.73 | 80.76 | 74.61 | c | 61.44 | d | 54.33 | f | 48.09 | i | 62.24 | b | |||||||
1963 | 40.87 | a | 50.74 | c | 48.85 | g | 50.47 | o | 65.65 | 67.79 | a | 79.77 | 78.00 | b | 73.27 | b | 63.89 | c | 53.05 | b | 45.72 | b | 61.88 | b | ||
1964 | 38.55 | c | 41.12 | d | 43.94 | f | 55.16 | b | 64.56 | e | 68.27 | h | 80.71 | c | 79.09 | c | 73.35 | f | 62.94 | d | 46.76 | a | 43.33 | b | 56.91 | c |
1965 | 45.87 | d | 45.42 | b | 46.41 | d | 53.38 | b | 59.06 | 66.41 | c | ----- | z | ----- | z | ----- | z | ----- | z | 44.33 | x | 44.50 | 51.58 | e | ||
1966 | 39.90 | b | 40.81 | a | 51.13 | a | 56.98 | 65.81 | d | 72.55 | a | 80.30 | a | 80.38 | c | 72.69 | f | 59.98 | g | 50.91 | a | 43.18 | a | 58.20 | b | |
1967 | 43.09 | b | 45.59 | 48.92 | a | 48.81 | a | 62.52 | 69.30 | 81.22 | a | 80.13 | 72.48 | 62.65 | d | 52.70 | 38.44 | 58.82 | ||||||||
1968 | 42.23 | 50.36 | 49.97 | 53.32 | 62.28 | a | 72.43 | a | 77.90 | 72.95 | a | 69.84 | b | 61.31 | 49.60 | a | 39.82 | 58.50 | ||||||||
1969 | 46.38 | a | 43.27 | 47.38 | a | 55.40 | 64.40 | 69.90 | a | 80.00 | 82.25 | a | 74.74 | e | 56.55 | 50.36 | a | 44.64 | b | 59.61 | ||||||
1970 | 41.10 | 47.70 | 47.72 | b | 49.98 | 63.52 | b | 71.98 | a | 81.20 | c | 80.03 | a | 69.11 | c | 56.13 | 49.28 | a | 41.60 | a | 58.28 | |||||
1971 | 41.57 | a | 44.07 | a | 49.35 | 53.45 | a | 59.73 | 70.55 | b | 81.98 | c | 77.93 | a | 70.80 | b | 54.76 | h | 47.22 | 39.04 | c | 57.79 | a | |||
1972 | 39.88 | a | 45.25 | a | 54.57 | a | 57.11 | c | 64.03 | 73.18 | 81.97 | 78.38 | g | 70.12 | a | 59.47 | 46.03 | 40.90 | b | 57.50 | a | |||||
1973 | 39.43 | c | 44.45 | i | 44.03 | 52.16 | a | 64.17 | a | 72.90 | 78.84 | 78.44 | 68.79 | f | 59.15 | 47.61 | b | 42.73 | a | 57.94 | b | |||||
1974 | 41.50 | 41.96 | 50.34 | b | 54.33 | a | 64.37 | 76.27 | 79.11 | 75.33 | b | 72.69 | a | 61.13 | 48.95 | b | 40.18 | a | 58.85 | |||||||
1975 | 41.44 | 43.34 | 45.48 | 48.48 | 60.43 | a | 70.90 | a | 79.92 | a | 77.45 | 73.37 | 58.81 | 47.32 | b | 47.26 | 57.85 | |||||||||
1976 | 43.97 | 47.95 | 47.61 | 52.40 | 64.89 | 71.62 | 79.61 | 76.20 | c | 70.35 | 57.71 | 50.18 | 42.18 | 58.72 | ||||||||||||
1977 | 42.72 | a | 45.91 | 43.61 | 56.65 | 58.45 | 74.17 | 80.29 | 79.44 | 71.85 | 62.31 | b | 51.68 | 47.32 | 59.53 | |||||||||||
1978 | 45.37 | 45.69 | a | 51.92 | 52.91 | a | 61.92 | a | 72.22 | 79.60 | a | 77.05 | 71.00 | a | 63.66 | 49.03 | 40.16 | 59.21 | ||||||||
1979 | 37.16 | 42.07 | 46.52 | 51.97 | 61.95 | 70.58 | 77.65 | 73.82 | 74.43 | b | 61.47 | 45.43 | 44.98 | 57.34 | ||||||||||||
1980 | 45.50 | 48.67 | 46.56 | 53.68 | 58.56 | 69.20 | 80.40 | 77.60 | 71.34 | a | 59.53 | 50.35 | 49.42 | 59.24 | ||||||||||||
1981 | 45.89 | 47.16 | 48.50 | 58.83 | 64.19 | 77.48 | 82.48 | 80.13 | 72.42 | 57.82 | 50.70 | 45.87 | 60.96 | |||||||||||||
1982 | 42.98 | d | 47.58 | b | 48.46 | d | 54.24 | c | 62.33 | a | 68.00 | b | 77.52 | c | 79.02 | 70.12 | b | 57.18 | 48.50 | a | 41.70 | c | 58.14 | |||
1983 | 43.77 | 45.87 | b | 48.22 | a | 49.92 | f | 62.00 | a | 68.47 | 78.84 | 77.64 | b | 74.37 | c | 60.65 | 49.03 | a | 44.45 | b | 59.39 | a | ||||
1984 | 43.72 | a | 43.75 | a | 50.02 | 53.56 | d | 68.08 | 71.43 | b | 80.45 | b | 77.32 | a | 72.83 | 55.50 | a | 46.89 | b | 43.09 | b | 58.89 | ||||
1985 | 41.78 | b | 42.83 | a | 48.60 | e | 58.60 | 63.11 | 72.22 | a | 79.77 | 77.58 | 66.10 | 60.02 | 47.12 | 44.13 | a | 58.49 | ||||||||
1986 | 46.65 | 47.73 | 52.85 | 55.18 | 62.48 | 73.25 | b | 75.82 | a | 78.78 | b | 64.52 | b | 55.32 | a | 48.18 | 42.33 | a | 58.59 | |||||||
1987 | 41.00 | 44.89 | a | 46.10 | b | 59.02 | b | 63.85 | a | 73.50 | p | 74.55 | a | ----- | z | ----- | z | 63.21 | 47.83 | 39.77 | 53.36 | c | ||||
1988 | 42.23 | 46.95 | a | 48.35 | 54.38 | b | 62.39 | c | 72.70 | b | 78.10 | b | 74.52 | f | 66.90 | 63.52 | 47.97 | 41.05 | 56.78 | a | ||||||
1989 | 40.34 | b | 44.81 | a | 51.92 | a | 59.65 | 60.70 | d | 68.23 | 77.28 | b | 75.34 | 70.53 | 58.73 | 49.50 | 42.39 | 58.29 | ||||||||
1990 | 41.48 | a | 43.22 | c | 50.53 | b | 57.20 | e | 60.55 | a | 73.38 | a | 78.67 | a | 74.32 | 70.93 | 59.14 | b | 48.53 | 36.85 | 57.90 | |||||
1991 | 41.16 | 47.70 | a | 44.67 | d | 51.84 | b | 58.50 | c | 65.74 | a | 76.50 | a | 76.84 | c | 70.98 | b | 62.03 | 49.45 | a | 43.77 | 57.43 | ||||
1992 | 42.47 | a | 47.98 | 47.79 | 56.28 | 61.37 | a | 64.27 | 70.71 | c | 71.82 | 65.82 | 56.53 | 40.72 | 35.39 | c | 55.10 | |||||||||
1993 | 40.58 | a | 43.15 | b | 49.73 | 54.47 | a | 62.97 | a | 67.55 | 71.53 | b | 74.39 | h | 67.79 | b | 59.48 | a | 46.75 | 41.95 | 55.09 | a | ||||
1994 | 42.48 | 43.24 | a | 51.63 | a | 56.67 | a | 62.28 | b | 75.14 | a | 79.00 | a | 81.23 | 72.91 | a | 57.16 | b | 43.88 | 43.82 | a | 59.12 | ||||
1995 | 44.95 | b | 50.55 | 49.55 | b | 53.08 | 59.29 | b | 68.86 | b | 77.98 | 81.28 | b | 73.62 | 60.13 | a | 54.17 | 42.56 | 59.67 | |||||||
1996 | 42.50 | 50.66 | d | 51.69 | b | 58.31 | a | 65.85 | 73.52 | c | 83.07 | d | 80.07 | h | 66.06 | n | 58.71 | 50.22 | a | 45.07 | a | 57.96 | b | |||
1997 | 44.74 | b | 44.18 | 52.90 | a | 54.39 | c | 68.87 | a | 69.91 | a | 76.65 | 80.07 | b | 74.84 | a | 60.95 | k | ----- | z | 43.32 | t | 62.95 | c | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.65 | 45.50 | 49.04 | 55.15 | 62.94 | 71.74 | 79.03 | 77.96 | 71.32 | 60.08 | 48.76 | 43.06 | 58.94 | |||||||||||||
S.D. | 2.38 | 3.09 | 2.76 | 3.02 | 2.63 | 3.36 | 2.69 | 2.42 | 2.68 | 2.51 | 2.52 | 3.01 | 1.26 | |||||||||||||
SKEW | 0.01 | 0.20 | -0.09 | -0.04 | 0.34 | -0.07 | -1.13 | -0.52 | -0.74 | -0.07 | -0.59 | -0.22 | -0.59 | |||||||||||||
MAX | 47.61 | 52.57 | 54.57 | 61.53 | 69.29 | 77.63 | 83.66 | 82.25 | 74.84 | 64.94 | 54.17 | 49.42 | 61.08 | |||||||||||||
MIN | 37.16 | 39.13 | 43.61 | 48.48 | 58.45 | 64.27 | 70.71 | 71.82 | 64.52 | 55.32 | 40.72 | 35.39 | 55.10 | |||||||||||||
YRS | 43 | 42 | 41 | 41 | 43 | 41 | 42 | 37 | 37 | 39 | 40 | 41 | 29 |