YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | 29.17 | g | 39.30 | 42.84 | 44.71 | 38.03 | 22.90 | 16.14 | b | -5.23 | a | 28.38 | e | |||||
1906 | 1.50 | a | 3.18 | 7.27 | t | 27.20 | 32.74 | 37.00 | a | 43.48 | 43.06 | 37.00 | 24.06 | 15.57 | 11.29 | 25.10 | a | |||||||||
1907 | 7.19 | 14.86 | 22.00 | 26.40 | 29.35 | 36.27 | 44.84 | 44.97 | 35.97 | 29.65 | 13.80 | 3.48 | 25.73 | |||||||||||||
1908 | -2.32 | 3.31 | 13.90 | 25.77 | 28.26 | 35.97 | 44.26 | 45.03 | 35.83 | 23.13 | 11.00 | -1.35 | 21.90 | |||||||||||||
1909 | 5.26 | -0.32 | 10.81 | 21.90 | 29.80 | a | 39.83 | 46.74 | 46.19 | 37.50 | 26.84 | 16.73 | -3.71 | 23.13 | ||||||||||||
1910 | 0.19 | 0.50 | 20.90 | 26.37 | 32.42 | 40.93 | 46.26 | 44.00 | 39.63 | 26.87 | 20.13 | 7.39 | 25.47 | |||||||||||||
1911 | 6.55 | 6.21 | 17.94 | 25.30 | 31.29 | 40.03 | 44.74 | 43.16 | 39.67 | 24.58 | 8.72 | a | -1.19 | 23.92 | ||||||||||||
1912 | -1.13 | 3.79 | 15.84 | 19.63 | 31.65 | 37.93 | 44.84 | 43.94 | 30.80 | 25.45 | 13.67 | -6.00 | 21.70 | |||||||||||||
1913 | -5.65 | 2.18 | 10.35 | 23.63 | 32.61 | 38.47 | 43.23 | 45.65 | 35.50 | 23.94 | 19.17 | -4.90 | 22.01 | |||||||||||||
1914 | -0.13 | -3.68 | 8.32 | 25.70 | 33.55 | 40.17 | 44.90 | 44.23 | 37.67 | 26.87 | 14.60 | -1.42 | 22.56 | |||||||||||||
1915 | -4.48 | 2.30 | a | 8.93 | a | ----- | z | ----- | z | 37.53 | 42.90 | 39.90 | ----- | z | ----- | z | ----- | z | ----- | z | 21.18 | f | ||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | 45.33 | y | 39.79 | a | 45.48 | 42.77 | ----- | z | ----- | z | ----- | z | ----- | z | 42.68 | i | ||
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.24 | n | 32.83 | a | ----- | z | ----- | z | ----- | z | 32.83 | k |
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 | ----- | 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 | 11.13 | 8.84 | 9.99 | j | ||
1959 | 0.26 | 3.64 | 11.87 | 26.93 | a | 32.39 | 41.73 | 45.23 | 45.19 | 35.21 | a | 25.42 | 11.80 | 8.74 | 24.03 | |||||||||||
1960 | -4.55 | -2.38 | 14.19 | 22.87 | 29.84 | 39.57 | 43.45 | 43.23 | 38.20 | 27.06 | 13.20 | 1.71 | 22.20 | |||||||||||||
1961 | -6.19 | 2.68 | 14.32 | 21.33 | 31.87 | a | 40.73 | 44.61 | 45.00 | 32.47 | 23.48 | 8.93 | -5.38 | b | 21.15 | |||||||||||
1962 | -8.45 | 4.43 | 5.40 | a | 25.83 | 30.00 | 36.23 | 40.84 | 40.45 | 35.63 | 26.61 | 18.77 | 9.03 | 22.06 | ||||||||||||
1963 | -2.94 | 8.93 | 10.52 | 23.43 | 35.94 | 38.20 | 47.48 | 44.52 | 38.37 | 30.65 | 14.53 | -1.87 | 23.98 | |||||||||||||
1964 | -10.77 | -8.31 | 2.13 | a | 17.40 | 30.42 | 35.73 | 44.97 | 40.77 | 34.57 | 25.81 | 10.03 | a | -5.61 | 18.09 | |||||||||||
1965 | -5.03 | -6.04 | -4.17 | a | 4.93 | c | 24.87 | 31.93 | 43.26 | 40.45 | 32.00 | 25.23 | a | 15.60 | -4.43 | a | 16.55 | |||||||||
1966 | -11.16 | -4.54 | 12.87 | 24.73 | 32.52 | 39.00 | 46.77 | 43.55 | 35.77 | 23.55 | 14.47 | 2.65 | 21.68 | |||||||||||||
1967 | -3.94 | 4.93 | 14.43 | a | 18.63 | 30.19 | 36.77 | 46.74 | 42.39 | 37.57 | 26.06 | 16.82 | b | 0.65 | 22.60 | |||||||||||
1968 | -5.84 | 3.07 | 10.45 | 19.87 | 29.03 | 38.77 | 42.68 | 38.90 | 32.40 | 24.53 | a | 12.97 | 0.94 | 20.65 | ||||||||||||
1969 | 3.06 | -2.64 | 4.52 | 22.80 | 33.81 | 35.07 | 44.48 | 44.68 | 36.67 | 19.00 | 8.30 | 3.52 | 21.10 | |||||||||||||
1970 | -4.42 | 1.86 | 11.81 | 18.10 | 30.29 | ----- | z | 42.74 | 43.74 | 28.47 | 19.32 | 12.00 | 2.48 | 18.76 | a | |||||||||||
1971 | 4.39 | 8.86 | 12.00 | 22.60 | 28.13 | 37.60 | 42.19 | 41.06 | 29.87 | 21.23 | 8.30 | -2.87 | 21.11 | |||||||||||||
1972 | -4.32 | 2.55 | 15.43 | a | 21.07 | 27.16 | 37.07 | 41.42 | 38.00 | 30.80 | 25.61 | 4.03 | -10.10 | 19.06 | ||||||||||||
1973 | -14.29 | -6.89 | 4.68 | 18.30 | 29.45 | 37.10 | 42.74 | 40.61 | 30.17 | 20.23 | 12.37 | -5.30 | a | 17.43 | ||||||||||||
1974 | -10.68 | -12.54 | 12.20 | a | 14.89 | b | 28.06 | 35.70 | 39.39 | 33.77 | 34.37 | 21.84 | 7.62 | a | -5.84 | 16.57 | ||||||||||
1975 | -4.42 | -4.54 | 9.71 | 15.90 | 27.06 | 33.73 | 41.35 | 39.00 | 33.70 | 21.29 | 10.17 | -3.06 | 18.32 | |||||||||||||
1976 | -9.10 | 4.04 | a | 7.71 | 20.33 | 28.45 | 31.34 | a | 40.29 | 36.90 | 32.41 | a | 17.39 | 11.37 | -0.19 | 18.41 | ||||||||||
1977 | -5.32 | 3.46 | 7.42 | 20.60 | 26.39 | 35.50 | 39.90 | ----- | z | 30.67 | 27.90 | ----- | z | 6.84 | 19.34 | b | ||||||||||
1978 | -2.97 | -0.04 | 16.74 | ----- | z | 28.25 | c | 37.50 | 41.23 | e | 38.70 | a | 33.72 | a | 24.70 | a | 16.10 | i | -5.79 | b | 21.21 | b | ||||
1979 | -9.38 | b | -5.44 | a | 11.43 | a | 19.68 | b | 30.48 | 36.67 | 44.20 | a | 42.16 | 37.73 | 26.61 | 6.23 | -0.53 | a | 19.99 | |||||||
1980 | 5.90 | a | 3.39 | a | 5.38 | e | 15.70 | 30.04 | h | 36.63 | 45.10 | 42.42 | 35.79 | a | 24.10 | 13.21 | a | 12.34 | b | 21.82 | a | |||||
1981 | 5.29 | 4.82 | 13.61 | 24.17 | 30.90 | 40.50 | b | 45.65 | 43.94 | 37.04 | e | 26.10 | 17.40 | 5.65 | 24.59 | |||||||||||
1982 | -2.83 | g | 0.90 | h | 14.22 | h | 21.27 | d | 30.28 | f | 36.04 | f | ----- | z | 46.21 | b | 37.88 | d | 22.57 | j | 7.78 | g | 3.03 | b | 27.10 | h |
1983 | 1.43 | h | 5.09 | f | 16.70 | a | 18.64 | e | 27.62 | e | 37.04 | f | 43.96 | d | 45.74 | d | 39.80 | e | 27.12 | f | 13.14 | h | 6.38 | e | 28.41 | e |
1984 | -10.10 | b | -4.84 | j | 8.74 | h | 15.27 | h | 33.21 | g | 38.70 | g | 46.19 | e | 44.22 | d | 36.09 | g | 23.71 | c | 11.43 | g | 0.86 | b | 20.98 | g |
1985 | -2.29 | j | -2.05 | g | 16.10 | k | 25.57 | g | 32.96 | e | 39.67 | f | 45.83 | h | 42.89 | d | 32.84 | e | 26.91 | h | 17.04 | f | 4.35 | k | 36.23 | i |
1986 | -1.20 | k | 11.14 | f | 18.30 | h | 24.36 | e | 30.00 | h | 40.21 | f | 44.23 | e | 44.68 | f | 35.05 | h | 23.80 | k | 12.17 | f | 2.00 | d | 23.53 | i |
1987 | -2.35 | k | 7.43 | g | 6.85 | k | 23.74 | g | 31.04 | f | 40.28 | e | 43.17 | h | 43.59 | d | 34.82 | h | 29.15 | e | 11.83 | g | -0.83 | h | 37.68 | i |
1988 | -6.22 | m | -1.22 | k | 10.92 | g | 22.64 | e | 30.33 | g | 40.81 | i | 43.50 | a | 43.73 | a | 33.93 | 28.45 | 11.81 | c | -0.87 | 26.17 | e | |||
1989 | -9.85 | d | 2.26 | a | 18.80 | a | 26.45 | a | 31.90 | 39.28 | a | 46.71 | 43.20 | a | 37.07 | 25.13 | 14.30 | 1.77 | 23.08 | |||||||
1990 | -0.23 | a | 8.86 | 20.19 | 28.62 | a | 30.48 | 41.13 | 45.39 | 41.23 | 39.57 | 27.45 | 14.83 | -1.93 | a | 24.63 | ||||||||||
1991 | -0.94 | 7.21 | 14.63 | a | 21.67 | 30.29 | 38.50 | 44.70 | a | 43.45 | 37.43 | 27.03 | 15.21 | a | 0.68 | 23.32 | ||||||||||
1992 | -2.84 | 8.59 | 19.71 | 29.17 | 35.97 | 38.70 | 43.58 | 44.77 | 37.33 | 30.03 | 6.86 | a | -2.06 | 24.15 | ||||||||||||
1993 | 2.45 | 9.25 | 16.65 | 23.00 | 33.90 | 38.37 | 44.13 | 44.10 | 34.45 | a | 26.90 | 7.60 | -1.52 | 23.27 | ||||||||||||
1994 | -0.23 | 1.29 | 17.71 | 25.67 | 33.39 | 42.93 | 45.84 | 46.52 | 37.83 | 28.00 | 13.24 | a | 4.06 | 24.69 | ||||||||||||
1995 | 4.42 | 13.79 | 18.32 | 22.37 | 29.35 | 37.27 | 43.29 | 47.32 | 38.79 | a | 24.97 | 18.13 | 10.16 | 25.68 | ||||||||||||
1996 | 3.13 | a | 9.66 | 14.97 | 24.80 | 35.03 | 42.90 | 48.45 | 45.23 | 36.60 | 27.19 | 17.97 | 4.32 | 25.85 | ||||||||||||
1997 | 4.10 | a | 3.50 | 16.32 | 23.83 | 34.90 | 41.23 | 45.39 | 46.16 | 40.07 | 26.26 | 13.20 | 0.29 | 24.60 | ||||||||||||
1998 | 1.13 | 5.11 | 13.20 | a | 22.10 | 32.19 | 37.30 | 48.63 | a | 45.26 | 39.40 | 28.00 | 17.20 | 6.32 | 24.65 | |||||||||||
1999 | 9.16 | 11.14 | 22.48 | 23.38 | a | 31.07 | b | 37.87 | 47.35 | 45.35 | 36.25 | b | 25.77 | 16.90 | 3.10 | a | 25.82 | |||||||||
2000 | 7.84 | 12.63 | b | 16.21 | c | 27.55 | a | 35.29 | c | 41.55 | a | 46.39 | 46.10 | 38.11 | b | 30.06 | 8.87 | 4.94 | 26.29 | |||||||
2001 | -0.26 | 5.96 | a | 18.23 | a | 27.75 | b | 35.34 | b | 40.89 | c | 47.13 | a | 44.43 | c | 38.89 | c | 27.48 | b | 16.73 | 0.06 | 25.22 | ||||
2002 | 2.16 | 0.07 | 11.10 | 28.59 | a | 31.87 | 43.03 | 47.29 | 45.13 | 39.33 | 26.35 | 11.43 | 3.74 | 24.18 | ||||||||||||
2003 | 7.32 | 8.61 | 16.07 | a | 23.73 | 34.42 | 38.13 | 48.23 | 46.58 | 35.77 | 30.42 | 15.17 | 6.55 | 25.92 | ||||||||||||
2004 | -0.90 | 4.45 | 20.07 | a | 26.83 | 33.32 | 39.43 | 45.55 | 42.00 | 36.27 | 27.97 | 17.80 | 3.16 | 24.66 | ||||||||||||
2005 | 9.68 | 8.14 | 15.74 | 24.17 | 34.00 | 38.33 | 47.10 | a | 44.32 | 37.90 | 30.45 | 16.59 | a | 1.10 | 25.63 | |||||||||||
2006 | 0.35 | 3.00 | 16.45 | 25.07 | 33.65 | 41.63 | 47.90 | 45.48 | 34.13 | 26.81 | 14.45 | a | 7.68 | 24.72 | ||||||||||||
2007 | 0.03 | 10.64 | 19.29 | 26.47 | 33.23 | 41.57 | 47.67 | a | 46.77 | 38.40 | 26.03 | 16.00 | 1.28 | b | 25.61 | |||||||||||
2008 | -6.97 | 5.03 | 10.72 | b | 20.60 | 30.48 | 39.63 | 46.42 | 46.03 | 37.10 | 27.13 | 19.43 | 5.90 | 23.46 | ||||||||||||
2009 | 5.19 | 6.86 | 18.65 | 24.30 | 35.11 | c | 38.63 | 47.48 | 43.77 | 38.20 | 24.77 | a | 15.83 | -2.39 | 24.70 | |||||||||||
2010 | 1.19 | 2.29 | 15.00 | 25.87 | 29.08 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 11.09 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -1.29 | 3.34 | 13.47 | 22.82 | 31.35 | 38.48 | 44.73 | 43.39 | 35.89 | 25.68 | 13.49 | 1.32 | 22.84 | |||||||||||||
S.D. | 5.81 | 5.61 | 5.30 | 4.17 | 2.65 | 2.50 | 2.22 | 2.65 | 2.88 | 2.89 | 3.76 | 4.95 | 2.65 | |||||||||||||
SKEW | -0.12 | -0.44 | -0.82 | -1.51 | -0.20 | -0.50 | -0.36 | -1.26 | -0.69 | -0.66 | -0.42 | 0.13 | -0.85 | |||||||||||||
MAX | 9.68 | 14.86 | 22.48 | 29.17 | 35.97 | 43.03 | 48.63 | 47.32 | 40.07 | 30.65 | 20.13 | 12.34 | 26.29 | |||||||||||||
MIN | -14.29 | -12.54 | -4.17 | 4.93 | 24.87 | 31.34 | 39.39 | 33.77 | 28.47 | 17.39 | 4.03 | -10.10 | 16.55 | |||||||||||||
YRS | 56 | 55 | 55 | 57 | 54 | 56 | 60 | 61 | 59 | 57 | 54 | 60 | 48 |