YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1904 | 26.29 | 33.14 | 50.06 | 52.53 | 56.26 | ----- | z | 75.12 | o | ----- | z | ----- | z | ----- | z | 33.41 | a | 31.35 | 40.44 | e | ||||||
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 | 39.27 | 28.29 | 33.78 | j | ||
1914 | 31.47 | a | 28.64 | 33.57 | c | 43.54 | f | 57.08 | f | 65.80 | 66.35 | 65.62 | g | 60.53 | 50.39 | 42.80 | 31.00 | 45.62 | c | |||||||
1915 | 27.27 | a | 33.07 | 33.65 | 48.73 | 54.73 | a | 64.80 | 68.93 | a | 65.29 | 62.43 | 47.77 | 35.83 | 32.42 | 47.91 | ||||||||||
1916 | 34.13 | 33.38 | 43.77 | 46.80 | 56.39 | 68.10 | 67.74 | 66.84 | 59.43 | 49.61 | 31.90 | 29.10 | 48.93 | |||||||||||||
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 | 60.93 | 63.94 | 66.45 | 57.80 | 48.55 | 35.77 | 27.32 | 51.54 | e | |||||||
1935 | 28.87 | 28.79 | 39.65 | 46.63 | 53.94 | 64.07 | 66.39 | 66.23 | 57.77 | 47.61 | 34.40 | 28.23 | a | 46.88 | ||||||||||||
1936 | 25.35 | 28.24 | 41.65 | 45.67 | 59.90 | 64.50 | 67.68 | 66.23 | 62.17 | 46.17 | a | 34.53 | 28.97 | 47.59 | ||||||||||||
1937 | 23.32 | 28.75 | 35.81 | ----- | z | 59.06 | 67.20 | 69.65 | 69.52 | 62.57 | 49.58 | 34.60 | 30.06 | 48.19 | a | |||||||||||
1938 | 31.74 | 37.04 | 38.71 | 48.07 | 58.42 | 67.90 | 67.97 | 67.10 | 59.80 | 50.94 | 29.23 | 25.42 | 48.53 | |||||||||||||
1939 | 29.00 | 23.54 | 40.45 | 47.63 | 57.52 | 67.50 | 69.26 | 65.39 | 60.17 | 47.97 | 34.83 | a | 29.68 | 47.74 | ||||||||||||
1940 | 22.40 | a | 29.07 | 35.84 | 47.43 | 54.94 | 62.93 | 66.84 | 65.55 | 59.60 | 48.87 | 36.93 | 41.19 | 47.63 | ||||||||||||
1941 | 42.52 | 35.36 | 36.65 | 49.03 | 60.23 | 64.07 | 68.10 | 67.97 | 63.27 | 56.16 | 38.60 | 31.42 | 51.11 | |||||||||||||
1942 | 26.35 | 29.25 | 34.35 | 48.41 | a | 56.97 | 62.73 | 68.94 | 67.55 | 58.10 | a | 49.19 | 37.50 | 32.74 | 47.67 | |||||||||||
1943 | 29.13 | 32.64 | 35.16 | 51.53 | 55.97 | 66.83 | 68.61 | 71.32 | 59.70 | 46.74 | 34.47 | 28.87 | 48.42 | |||||||||||||
1944 | 25.10 | a | 37.07 | a | 35.90 | 43.48 | a | 54.68 | 67.67 | 69.55 | 67.48 | 58.17 | 48.87 | 38.10 | 27.03 | 47.76 | ||||||||||
1945 | 30.90 | 33.85 | a | 40.35 | 44.53 | 57.35 | ----- | z | 68.45 | 68.48 | 60.13 | 49.27 | a | 36.00 | 26.71 | 46.91 | a | |||||||||
1946 | ----- | z | 28.59 | f | 38.03 | a | 50.30 | 55.39 | 66.97 | 68.39 | 69.74 | 65.60 | 54.32 | 34.77 | 32.26 | 53.58 | b | |||||||||
1947 | 26.55 | b | 27.18 | 35.48 | 47.07 | 54.58 | 66.90 | 69.33 | m | 68.16 | 60.03 | 53.81 | 34.60 | 28.81 | 45.74 | a | ||||||||||
1948 | 22.00 | 29.72 | 35.23 | 51.40 | 60.23 | 69.40 | 70.74 | 70.23 | 60.10 | 49.14 | c | 30.97 | 33.55 | 48.56 | ||||||||||||
1949 | 26.94 | 31.92 | b | 39.35 | 48.03 | 60.13 | 67.80 | 70.55 | 66.48 | 62.93 | 48.33 | a | 35.80 | 28.90 | 48.93 | |||||||||||
1950 | 31.65 | 36.14 | 39.30 | a | 48.73 | 58.00 | 68.57 | 70.19 | 67.16 | 63.30 | 51.42 | 31.37 | 26.03 | a | 49.32 | |||||||||||
1951 | 23.13 | 29.25 | 37.13 | 47.43 | 58.47 | a | 73.43 | b | 77.03 | 69.32 | 65.69 | a | 56.10 | b | 36.93 | a | 35.41 | b | 50.78 | |||||||
1952 | 33.86 | c | 33.25 | a | 39.97 | 57.40 | e | ----- | z | 74.54 | f | 68.93 | c | 68.45 | 56.00 | 38.97 | a | ----- | z | ----- | z | 49.60 | d | |||
1953 | ----- | z | 24.88 | b | 35.90 | ----- | z | 55.77 | 70.80 | 72.35 | 69.61 | 60.11 | c | 49.42 | 36.03 | 24.68 | 49.96 | b | ||||||||
1954 | 29.10 | 32.36 | 39.65 | 50.03 | 55.03 | 66.47 | 69.45 | 68.52 | 62.97 | 49.19 | 33.93 | 25.63 | a | 48.53 | ||||||||||||
1955 | 27.68 | 27.89 | a | 36.97 | a | 46.97 | 57.16 | 62.83 | 68.06 | 67.97 | 62.90 | 48.03 | 35.97 | 30.26 | 47.72 | |||||||||||
1956 | 28.35 | 29.07 | 38.65 | 46.70 | 59.94 | 69.33 | 69.58 | 66.65 | 58.70 | 50.32 | 30.67 | 29.52 | 48.12 | |||||||||||||
1957 | 29.87 | a | 42.64 | 42.16 | 45.97 | 56.81 | 66.43 | 70.71 | 69.39 | 58.73 | 51.42 | 37.50 | 29.32 | 50.08 | ||||||||||||
1958 | 27.94 | 34.29 | 38.00 | 48.43 | 58.16 | 68.90 | 71.13 | 68.19 | 65.93 | 52.45 | 37.30 | 26.65 | 49.78 | |||||||||||||
1959 | 24.23 | 32.21 | 34.23 | 46.63 | 59.39 | 66.77 | 67.45 | 68.19 | 59.87 | 46.87 | 30.07 | 29.19 | 47.09 | |||||||||||||
1960 | 25.55 | 28.38 | 35.03 | 46.00 | 54.03 | 66.50 | 67.29 | 67.26 | 59.43 | 51.10 | 36.17 | 26.53 | a | 46.94 | ||||||||||||
1961 | 24.35 | 29.64 | 36.29 | 43.40 | 56.23 | 64.27 | 65.87 | 64.74 | 60.62 | a | 48.32 | 36.63 | 29.67 | a | 46.67 | |||||||||||
1962 | 23.10 | 35.46 | 34.87 | 50.70 | 60.26 | 66.97 | 70.52 | 68.74 | 64.50 | 53.26 | 38.77 | 33.48 | 50.05 | |||||||||||||
1963 | 23.61 | 32.71 | 38.74 | 53.00 | 60.65 | 67.93 | 72.55 | 68.58 | 61.50 | 50.84 | 36.60 | 25.71 | 49.37 | |||||||||||||
1964 | 23.65 | 23.79 | 37.87 | 45.13 | 59.81 | 65.90 | 70.29 | 69.52 | 62.67 | 46.06 | 36.52 | a | 30.84 | 47.67 | ||||||||||||
1965 | 31.45 | 29.57 | 34.58 | 51.30 | 58.81 | 67.47 | 70.16 | 67.48 | 63.10 | 46.45 | ----- | z | 34.97 | 50.49 | a | |||||||||||
1966 | 25.19 | 26.82 | 38.77 | 49.37 | 59.39 | 65.87 | 72.06 | 67.74 | 63.20 | 45.71 | 39.63 | 25.58 | 48.28 | |||||||||||||
1967 | 23.16 | 30.54 | 42.55 | 55.40 | 53.19 | 66.40 | 69.19 | 65.52 | 59.47 | 45.87 | 40.40 | 27.83 | a | 48.29 | ||||||||||||
1968 | 31.65 | 32.86 | 39.03 | 49.43 | 55.58 | 64.97 | a | 68.29 | c | 66.07 | a | 56.90 | a | 47.26 | 34.77 | 26.17 | a | 47.75 | ||||||||
1969 | 30.47 | a | 33.00 | a | 31.00 | 49.41 | c | 57.40 | a | 64.13 | 71.19 | 69.77 | a | 62.87 | 50.19 | 35.77 | 32.29 | 48.96 | ||||||||
1970 | 25.29 | 31.89 | 35.81 | 46.27 | 52.19 | 63.67 | 67.52 | 66.36 | c | 61.57 | 44.29 | 31.83 | 30.55 | 46.44 | ||||||||||||
1971 | 29.68 | 28.82 | 35.52 | 45.57 | 54.13 | 65.23 | 68.06 | 64.81 | 59.43 | 50.58 | 37.67 | 31.77 | 47.61 | |||||||||||||
1972 | 27.48 | 29.62 | 41.68 | 47.29 | b | 56.81 | 64.20 | 67.84 | 65.13 | 63.47 | 51.74 | 34.43 | 26.39 | 48.01 | ||||||||||||
1973 | 27.26 | 31.46 | 39.71 | 41.62 | a | 52.84 | 63.23 | 67.39 | 64.94 | 59.30 | 46.81 | 37.40 | 24.97 | 46.41 | ||||||||||||
1974 | 27.81 | 28.68 | 43.06 | 49.30 | 58.16 | 63.87 | 67.65 | 65.52 | 56.77 | 51.84 | 37.73 | 30.19 | 48.38 | |||||||||||||
1975 | 30.26 | 32.68 | 36.48 | 41.93 | 50.94 | 62.90 | 65.26 | 64.81 | 56.63 | 45.42 | 31.90 | 27.58 | 45.57 | |||||||||||||
1976 | 24.39 | 32.66 | 37.97 | 46.23 | 52.55 | 65.57 | 66.03 | 65.29 | 60.93 | 42.87 | 31.37 | 24.97 | 45.90 | |||||||||||||
1977 | 26.19 | 32.86 | 35.65 | 47.47 | 57.03 | 65.70 | 69.35 | 71.61 | 64.63 | 50.29 | 34.37 | 32.03 | 48.93 | |||||||||||||
1978 | 26.87 | 28.79 | 39.39 | 49.43 | 58.23 | 66.70 | 69.52 | 66.23 | 61.60 | 49.48 | 43.30 | 29.84 | 49.11 | |||||||||||||
1979 | 26.39 | 28.82 | 37.93 | a | 46.27 | 54.00 | 61.53 | 69.74 | 64.77 | 58.47 | 46.35 | 31.13 | 27.55 | 46.08 | ||||||||||||
1980 | 31.06 | 32.00 | 36.16 | 41.97 | 55.74 | 68.07 | 71.71 | 68.65 | 63.87 | 47.03 | 34.37 | 31.32 | 48.50 | |||||||||||||
1981 | 31.58 | 31.96 | 39.00 | 49.50 | 55.00 | 64.30 | 70.00 | 65.81 | 60.50 | 51.23 | 37.13 | 30.84 | 48.90 | |||||||||||||
1982 | 27.42 | 30.04 | a | 38.77 | 49.67 | 55.32 | 63.70 | 69.42 | 69.10 | 63.40 | 48.27 | a | 37.73 | 30.71 | 48.63 | |||||||||||
1983 | 28.74 | 32.82 | 39.94 | 42.80 | 53.87 | 62.00 | 70.74 | 68.84 | 63.90 | 54.10 | 40.47 | 23.74 | 48.50 | |||||||||||||
1984 | 27.45 | 28.66 | 36.90 | 45.67 | 58.97 | 66.97 | 67.61 | 67.55 | 56.50 | 49.03 | 36.47 | 34.52 | 48.02 | |||||||||||||
1985 | 25.45 | 28.00 | 41.94 | 48.33 | 57.06 | 63.53 | 66.16 | 67.39 | 62.23 | 50.74 | 39.27 | 24.06 | 47.85 | |||||||||||||
1986 | 27.65 | 33.86 | 38.65 | 51.17 | 54.94 | 66.00 | 67.52 | 68.13 | 61.87 | 49.68 | 36.47 | 30.65 | 48.88 | |||||||||||||
1987 | 26.55 | 34.57 | 33.39 | 41.80 | 55.35 | 63.60 | 68.45 | 68.65 | 59.47 | 51.23 | 35.33 | 27.39 | 47.15 | |||||||||||||
1988 | 24.03 | 30.25 | a | 34.90 | 45.47 | 56.94 | 65.30 | 68.19 | 68.52 | 58.63 | 49.42 | 36.57 | 27.65 | 47.16 | ||||||||||||
1989 | 29.65 | 32.29 | 39.26 | 50.20 | 58.39 | 65.97 | 70.26 | 68.39 | 58.70 | 49.19 | 36.57 | 24.16 | 48.58 | |||||||||||||
1990 | 27.58 | 30.61 | 40.39 | 50.60 | 56.35 | 71.33 | 68.19 | 65.16 | 63.20 | 46.94 | 39.77 | 28.90 | 49.09 | |||||||||||||
1991 | 30.13 | 35.25 | 41.19 | 46.87 | 59.52 | 66.13 | 67.71 | 67.23 | 58.37 | 47.35 | 33.27 | 33.16 | 48.85 | |||||||||||||
1992 | 30.29 | 35.59 | 40.29 | 46.97 | 56.87 | 62.80 | 67.58 | 66.45 | 61.03 | 47.94 | 31.80 | 31.48 | 48.26 | |||||||||||||
1993 | 32.97 | 34.00 | 39.48 | 46.07 | 54.97 | 66.90 | 70.61 | 69.32 | 60.20 | 46.58 | 32.80 | 30.68 | 48.71 | |||||||||||||
1994 | 28.68 | 31.21 | 42.39 | 46.20 | 59.55 | 69.17 | 69.74 | 69.74 | 60.10 | 51.00 | 39.93 | 33.65 | 50.11 | |||||||||||||
1995 | 32.65 | 37.57 | 41.19 | 45.70 | 58.10 | 65.07 | 68.52 | 70.48 | 61.90 | 47.81 | 38.47 | 31.52 | 49.91 | |||||||||||||
1996 | 26.87 | 34.28 | 32.52 | 45.53 | 60.65 | 68.87 | 71.42 | 68.97 | 59.93 | 47.35 | 36.33 | 29.13 | 48.49 | |||||||||||||
1997 | 29.55 | 32.57 | 40.93 | a | 44.53 | 57.23 | 64.13 | 69.84 | 69.00 | 63.77 | 49.39 | 35.27 | 28.19 | 48.70 | ||||||||||||
1998 | 31.23 | 35.14 | 37.58 | 44.13 | 59.06 | 67.77 | 72.35 | 69.61 | 65.77 | 53.06 | 41.57 | 29.77 | 50.59 | |||||||||||||
1999 | 29.90 | 33.21 | 39.71 | 47.47 | 57.58 | 68.73 | d | 71.35 | h | 71.00 | c | 62.86 | i | ----- | z | ----- | z | ----- | z | 49.66 | e | |||||
2000 | ----- | z | ----- | z | ----- | z | ----- | z | 63.38 | b | 68.17 | a | 71.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.69 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.03 | 31.55 | 38.15 | 47.59 | 56.95 | 66.05 | 69.06 | 67.68 | 60.95 | 49.11 | 35.88 | 29.43 | 48.31 | |||||||||||||
S.D. | 3.47 | 3.34 | 3.13 | 3.06 | 2.43 | 2.41 | 2.05 | 1.77 | 2.45 | 2.90 | 3.00 | 3.16 | 1.18 | |||||||||||||
SKEW | 0.99 | 0.22 | 0.60 | 0.47 | -0.06 | 0.33 | 0.65 | 0.05 | 0.09 | -0.23 | 0.04 | 0.65 | 0.01 | |||||||||||||
MAX | 42.52 | 42.64 | 50.06 | 57.40 | 63.38 | 73.43 | 77.03 | 71.61 | 65.93 | 56.16 | 43.30 | 41.19 | 51.11 | |||||||||||||
MIN | 22.00 | 23.54 | 31.00 | 41.62 | 50.94 | 60.93 | 63.94 | 64.74 | 56.00 | 38.97 | 29.23 | 23.74 | 45.57 | |||||||||||||
YRS | 67 | 68 | 69 | 66 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 59 |