YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.94 | 58.13 | 45.90 | 33.19 | 21.33 | -2.32 | 37.03 | f | ||||||
1917 | -7.97 | -9.32 | 14.45 | 31.60 | 40.68 | 50.90 | 59.87 | 52.87 | 45.90 | 27.77 | 27.28 | a | -3.52 | 27.54 | ||||||||||||
1918 | -8.61 | -0.16 | c | 24.87 | 27.43 | 44.06 | 53.90 | 56.65 | 57.52 | 41.63 | 38.58 | 27.07 | 18.77 | 31.81 | ||||||||||||
1919 | 9.84 | 3.44 | c | 19.16 | 34.70 | 45.55 | 59.33 | 61.32 | 55.29 | 50.10 | 32.61 | 16.97 | -1.03 | a | 32.27 | |||||||||||
1920 | -5.52 | 5.24 | 17.65 | 27.00 | 44.10 | 55.13 | 57.03 | 54.19 | 51.00 | 42.32 | 23.37 | 13.00 | 32.04 | |||||||||||||
1921 | 11.35 | 12.18 | 22.23 | a | 36.15 | c | 45.83 | a | 58.48 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.55 | g | ||
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 | 64.81 | 59.06 | 47.03 | 37.93 | b | 24.31 | a | 17.77 | a | 41.82 | f | |||
1958 | 14.61 | c | 5.07 | a | 23.81 | e | 36.23 | 46.87 | a | 50.20 | 57.21 | c | 56.52 | 51.08 | e | 40.38 | b | 23.39 | b | 3.94 | 34.11 | |||||
1959 | -0.74 | 3.96 | 22.42 | 31.97 | 48.81 | 58.40 | 59.90 | 63.29 | 49.38 | a | 34.53 | a | 15.10 | a | 18.24 | b | 33.77 | |||||||||
1960 | 4.83 | a | 5.43 | a | 8.30 | a | 35.73 | 46.58 | 52.62 | a | 59.58 | 60.55 | 51.93 | 38.14 | b | 25.10 | 7.80 | a | 33.05 | |||||||
1961 | 4.71 | 17.13 | e | 26.97 | 29.20 | 42.43 | a | 56.17 | 58.10 | 58.77 | a | 49.70 | 39.13 | h | 25.47 | 6.97 | a | 34.15 | a | |||||||
1962 | 0.13 | a | 5.27 | b | 17.58 | 32.30 | 51.21 | b | 55.14 | a | 57.80 | a | 57.07 | a | 45.69 | a | 41.57 | a | 29.53 | 11.39 | 33.72 | |||||
1963 | -3.65 | 4.07 | 26.58 | 38.60 | 44.84 | 60.53 | 60.94 | 57.87 | 51.23 | 45.13 | 29.47 | 2.52 | 34.84 | |||||||||||||
1964 | 11.39 | 13.69 | 15.07 | a | 37.43 | b | 48.23 | a | 54.70 | c | 63.26 | 55.45 | 47.89 | b | 37.40 | a | 25.03 | a | 1.83 | a | 34.28 | |||||
1965 | -2.16 | -0.26 | a | 7.23 | a | 34.32 | b | 49.77 | 55.83 | 58.97 | 56.39 | 43.62 | a | 39.52 | 23.93 | 21.20 | a | 32.36 | ||||||||
1966 | -6.81 | ----- | z | 28.55 | 32.07 | a | 41.32 | 55.87 | 63.50 | a | 55.75 | c | 49.20 | 36.58 | 20.37 | 9.26 | 35.06 | a | ||||||||
1967 | 4.87 | -3.68 | 21.32 | 36.50 | 40.43 | c | 56.20 | 57.10 | a | 53.77 | 46.17 | 37.00 | c | 24.13 | g | 13.90 | b | 33.05 | a | |||||||
1968 | 5.32 | 5.48 | 27.61 | 38.57 | 43.87 | 55.64 | b | 60.16 | ----- | z | 49.50 | 40.55 | 26.77 | 9.77 | 33.02 | a | ||||||||||
1969 | -1.07 | b | 11.48 | c | 11.19 | 39.50 | 50.07 | a | 50.68 | b | 61.48 | 58.84 | 49.77 | 36.81 | 25.20 | 10.42 | 33.70 | |||||||||
1970 | -7.13 | a | 2.41 | a | 13.47 | a | 33.07 | b | 45.43 | a | 57.87 | 60.81 | 58.97 | 50.67 | 39.26 | 25.00 | 7.61 | 32.29 | ||||||||
1971 | -3.41 | b | 9.07 | 19.13 | 34.87 | 42.77 | a | 59.47 | 55.97 | a | 57.07 | a | 50.20 | 42.52 | 24.57 | 8.29 | 33.37 | |||||||||
1972 | -3.39 | 0.66 | 17.48 | 30.97 | a | 49.10 | 53.48 | a | 57.81 | 57.87 | 47.93 | 34.65 | 27.10 | 3.10 | a | 31.40 | ||||||||||
1973 | 9.10 | 14.39 | 32.93 | a | 34.33 | 44.94 | 58.03 | 60.42 | 61.45 | 48.23 | 42.23 | 26.30 | 9.39 | 36.81 | ||||||||||||
1974 | 1.32 | 5.39 | 20.42 | 35.77 | 42.61 | 52.93 | 63.03 | 55.03 | 43.50 | 38.74 | 26.07 | 15.68 | 33.37 | |||||||||||||
1975 | 4.42 | 5.79 | 12.61 | 31.47 | 49.26 | 55.77 | 61.68 | 57.94 | 45.00 | 40.29 | 25.90 | 10.57 | a | 33.39 | ||||||||||||
1976 | -0.58 | 16.55 | 22.16 | 38.03 | 44.16 | 57.53 | ----- | z | 58.65 | 46.27 | 30.84 | 15.30 | -0.83 | b | 29.83 | a | ||||||||||
1977 | -11.61 | 12.36 | 27.58 | 40.73 | 53.71 | 57.03 | 62.45 | 55.94 | 50.47 | 37.26 | 22.30 | 6.77 | a | 34.58 | ||||||||||||
1978 | -5.74 | -1.71 | 17.87 | 33.73 | 47.55 | 53.87 | 57.84 | 54.55 | 51.67 | 38.40 | a | 22.10 | a | 3.48 | b | 31.13 | ||||||||||
1979 | -8.39 | -3.04 | 18.42 | 32.00 | 41.84 | 54.53 | 60.58 | 58.26 | 50.00 | 38.29 | 23.24 | a | 18.45 | 32.02 | ||||||||||||
1980 | 7.77 | 6.14 | 18.23 | 37.27 | 48.94 | 55.67 | 61.10 | 59.74 | 51.00 | 36.48 | 27.50 | 11.00 | b | 35.07 | ||||||||||||
1981 | 8.13 | 13.75 | 27.13 | 39.69 | a | 46.90 | 57.60 | 63.32 | 61.45 | 49.47 | 38.93 | a | 29.17 | a | 7.77 | 36.94 | ||||||||||
1982 | -10.33 | a | 6.14 | 21.77 | 34.23 | 51.34 | b | 52.93 | 63.72 | b | 58.83 | b | 49.86 | a | 39.81 | 19.68 | b | 15.84 | 33.65 | |||||||
1983 | 8.03 | a | 18.15 | a | 25.71 | 31.76 | a | 43.43 | a | 56.97 | a | 65.83 | a | 63.97 | 51.03 | a | 37.74 | 27.37 | -10.07 | a | 34.99 | |||||
1984 | 0.32 | 18.76 | 14.74 | 36.40 | 45.06 | 60.07 | b | 61.29 | 62.61 | 45.47 | 41.94 | 23.83 | 6.97 | 34.79 | ||||||||||||
1985 | -3.35 | 3.86 | 26.35 | 39.30 | 51.57 | a | 54.00 | 61.03 | 56.48 | 49.77 | 35.03 | 13.97 | -4.68 | c | 31.94 | |||||||||||
1986 | 6.57 | a | 4.26 | a | 22.73 | a | 39.03 | 48.57 | c | 57.77 | 63.45 | 55.10 | 50.80 | 38.34 | b | 18.37 | 14.33 | a | 34.94 | |||||||
1987 | 9.63 | a | 20.93 | 27.33 | a | 38.60 | 50.53 | a | 58.63 | 63.94 | 57.16 | 50.17 | 31.77 | 27.61 | b | 14.97 | a | 37.61 | ||||||||
1988 | -5.16 | -0.31 | 23.06 | 33.50 | 51.39 | 60.83 | 62.58 | 61.53 | a | 48.40 | 30.23 | 22.00 | a | 8.45 | 33.04 | |||||||||||
1989 | 7.35 | -4.07 | 16.29 | 31.83 | 44.50 | a | 54.73 | 63.26 | 58.61 | 47.93 | 32.53 | a | 17.33 | -1.32 | 30.75 | |||||||||||
1990 | 14.03 | 8.29 | 23.90 | 34.03 | 44.37 | a | 58.60 | 60.55 | 56.29 | 51.63 | 33.71 | 24.60 | 3.97 | 34.50 | ||||||||||||
1991 | -0.48 | 12.43 | 23.29 | 37.97 | 52.26 | 62.23 | 62.19 | 60.74 | 48.59 | a | 33.77 | 16.70 | 8.37 | a | 34.84 | |||||||||||
1992 | 10.33 | a | 19.38 | 24.00 | 32.13 | 48.73 | a | 53.93 | b | 55.43 | a | 54.39 | c | 46.04 | d | 34.87 | 25.41 | c | 10.46 | c | 34.59 | |||||
1993 | -1.76 | f | 4.40 | c | 16.17 | a | 33.10 | a | 48.27 | a | 54.69 | a | 61.23 | 59.39 | c | 43.52 | c | 33.93 | a | 21.07 | b | 9.96 | c | 35.07 | a | |
1994 | -7.00 | b | -1.96 | c | 23.77 | 32.41 | a | 49.10 | a | 57.47 | 57.90 | a | 56.11 | d | 52.71 | b | 41.21 | c | 27.86 | b | 12.52 | b | 33.51 | |||
1995 | 5.73 | a | 8.04 | a | 24.21 | b | 31.34 | a | 45.33 | a | 60.03 | 60.75 | c | 62.70 | a | 47.20 | 36.00 | b | 17.54 | b | 8.81 | 33.97 | ||||
1996 | -4.20 | a | 4.00 | a | 14.38 | b | 30.17 | a | 45.97 | a | 58.17 | 58.61 | 58.10 | 48.57 | 35.77 | a | 15.17 | a | 2.10 | a | 30.57 | |||||
1997 | -2.73 | a | 8.30 | a | 18.28 | b | 32.50 | b | 42.40 | a | 58.76 | a | 62.87 | 59.32 | 51.27 | 37.65 | 18.71 | b | 18.21 | b | 33.79 | |||||
1998 | 7.26 | 23.67 | a | 22.26 | 38.79 | a | 51.76 | b | 56.57 | 62.13 | 61.32 | 52.47 | 39.66 | b | 27.68 | b | 12.28 | b | 37.99 | |||||||
1999 | 1.28 | b | 18.04 | a | 23.24 | b | 36.73 | 50.13 | 57.71 | b | 64.45 | 58.03 | b | 46.33 | c | 34.96 | c | 28.83 | a | 12.97 | 36.06 | |||||
2000 | 2.74 | 18.04 | a | 29.65 | 33.52 | a | 48.32 | 55.97 | 61.58 | 58.68 | 49.90 | 42.93 | a | 24.14 | b | 1.68 | 35.60 | |||||||||
2001 | 10.07 | c | -0.71 | d | 17.73 | a | 37.41 | a | 49.90 | 58.37 | 63.77 | 60.29 | 49.20 | 36.94 | 33.57 | 17.34 | b | 36.16 | ||||||||
2002 | 16.03 | b | 18.50 | 14.77 | a | 35.07 | a | 43.45 | 60.37 | 66.10 | 60.29 | 53.40 | 32.93 | a | 23.33 | 17.97 | a | 36.85 | ||||||||
2003 | 5.38 | b | 4.54 | 20.41 | b | 36.73 | 46.32 | 56.47 | 61.68 | 60.32 | 48.93 | a | 39.53 | a | 22.87 | 16.03 | b | 34.93 | ||||||||
2004 | 3.79 | b | 13.48 | d | 28.30 | a | 35.17 | 44.38 | b | 54.30 | 59.81 | 53.61 | 55.55 | a | 40.62 | b | 28.69 | a | 13.92 | e | 35.97 | |||||
2005 | 6.52 | b | 16.36 | 20.57 | a | 39.77 | 46.17 | a | 61.63 | 63.35 | 58.84 | 54.43 | 41.03 | 27.21 | a | 11.03 | b | 37.24 | ||||||||
2006 | 20.50 | c | 8.22 | a | 24.35 | 41.13 | 49.19 | 58.33 | 65.23 | 60.26 | 48.62 | a | 36.45 | 22.40 | j | 18.48 | 39.16 | a | ||||||||
2007 | 11.65 | h | 0.62 | b | 25.52 | b | 33.77 | 49.61 | 58.07 | 60.27 | a | 59.03 | 50.00 | 42.71 | 24.10 | 3.93 | a | 37.06 | a | |||||||
2008 | 0.33 | a | 1.89 | b | 15.84 | 31.97 | 44.60 | a | 55.30 | 60.60 | a | 56.19 | 49.55 | a | 35.13 | 23.87 | 1.00 | l | 34.12 | a | ||||||
2009 | -4.32 | l | 8.72 | j | 20.65 | n | 34.27 | 44.04 | h | 55.28 | e | 56.48 | f | 56.52 | f | 53.13 | 34.69 | o | ----- | z | ----- | z | 47.56 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 2.29 | 7.53 | 20.91 | 34.80 | 46.76 | 56.49 | 61.11 | 58.15 | 49.06 | 37.41 | 23.74 | 9.03 | 33.96 | |||||||||||||
S.D. | 7.39 | 7.49 | 5.49 | 3.29 | 3.28 | 2.70 | 2.62 | 2.58 | 2.80 | 3.61 | 4.30 | 6.94 | 2.08 | |||||||||||||
SKEW | 0.16 | 0.19 | -0.31 | -0.10 | 0.02 | -0.15 | -0.16 | 0.09 | -0.36 | -0.31 | -0.50 | -0.47 | -0.41 | |||||||||||||
MAX | 20.50 | 23.67 | 32.93 | 41.13 | 53.71 | 62.23 | 66.10 | 63.97 | 55.55 | 45.13 | 33.57 | 21.20 | 37.99 | |||||||||||||
MIN | -11.61 | -9.32 | 7.23 | 27.00 | 40.43 | 50.20 | 55.43 | 52.87 | 41.63 | 27.77 | 13.97 | -10.07 | 27.54 | |||||||||||||
YRS | 54 | 55 | 56 | 57 | 56 | 56 | 56 | 56 | 58 | 56 | 55 | 56 | 46 |