YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 20.35 | e | 36.27 | 35.60 | a | 44.00 | 50.19 | 48.14 | b | 42.27 | 33.47 | a | 24.97 | a | 15.80 | a | 35.10 | b | ||||
1916 | 4.13 | h | 17.85 | c | 29.35 | e | 28.50 | 35.90 | 43.67 | 56.13 | 51.23 | 40.40 | 30.52 | 18.14 | p | 8.11 | d | 34.16 | b | |||||||
1917 | 12.54 | g | 12.70 | r | ----- | z | 25.73 | 33.61 | 43.63 | 52.45 | 48.68 | 43.63 | 29.63 | d | ----- | z | ----- | z | 39.62 | e | ||||||
1918 | ----- | z | ----- | z | ----- | z | 25.40 | 37.77 | 50.47 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.88 | i | |||
1919 | 16.06 | 12.50 | 19.48 | 29.25 | b | 36.42 | 46.53 | 55.58 | 52.58 | 47.10 | ----- | z | ----- | z | ----- | z | 35.06 | c | ||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.61 | 48.29 | 42.20 | 33.03 | a | 17.21 | k | 16.48 | b | 38.12 | g | |||
1921 | 14.73 | a | 15.62 | b | 20.42 | 26.77 | 39.14 | c | 49.27 | 53.07 | a | 51.94 | 42.00 | b | ----- | z | ----- | z | ----- | z | 34.77 | c | ||||
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 | 11.41 | b | 11.67 | b | 15.69 | b | 30.50 | 38.29 | 48.00 | 52.23 | 52.13 | 46.67 | 31.13 | 19.40 | 12.26 | 30.78 | ||||||||||
1949 | 0.42 | 10.32 | 21.39 | 31.73 | 40.58 | 47.67 | 53.17 | a | 51.35 | 42.23 | 30.87 | 30.27 | 13.32 | 31.11 | ||||||||||||
1950 | 8.74 | 19.68 | 17.90 | 26.07 | 33.97 | 45.63 | 50.16 | 47.52 | 43.10 | 36.26 | 21.45 | a | 20.52 | 30.92 | ||||||||||||
1951 | 8.39 | 15.18 | 16.32 | 24.57 | 39.13 | 42.13 | 52.93 | a | 51.42 | 40.20 | 30.62 | b | 19.17 | 11.68 | 29.31 | |||||||||||
1952 | 11.48 | 15.24 | 16.60 | a | 29.34 | a | 38.90 | 49.93 | 52.23 | 52.67 | a | 44.36 | b | 31.62 | b | 16.37 | 18.39 | c | 31.43 | |||||||
1953 | 23.77 | 13.74 | a | 21.74 | 24.07 | 35.10 | 48.83 | 54.16 | 52.90 | 43.37 | 34.35 | 26.53 | 15.19 | 32.81 | ||||||||||||
1954 | 18.39 | 23.14 | 16.26 | 31.03 | 37.90 | 46.33 | 56.19 | 53.13 | 46.03 | 32.87 | 26.33 | 18.74 | 33.86 | |||||||||||||
1955 | 10.74 | 10.89 | a | 15.77 | 29.30 | 38.90 | 45.53 | 53.23 | 54.73 | a | 43.83 | 34.07 | b | 17.77 | 18.55 | 31.11 | ||||||||||
1956 | 17.19 | 11.24 | 19.77 | 26.43 | 40.23 | 49.37 | 51.32 | 50.23 | 41.93 | 34.29 | 20.57 | 21.39 | 32.00 | |||||||||||||
1957 | 7.87 | 21.07 | 20.23 | 26.27 | 37.39 | 45.43 | 53.29 | 52.71 | 40.23 | 35.23 | 20.23 | 22.13 | 31.84 | |||||||||||||
1958 | 15.61 | 18.93 | 16.35 | 28.53 | 42.03 | 47.57 | 49.26 | 53.39 | 44.67 | 34.32 | 22.13 | 18.52 | 32.61 | |||||||||||||
1959 | 14.29 | 13.43 | 20.35 | 25.90 | 37.71 | 48.43 | 51.03 | 53.94 | 41.10 | 29.71 | 19.03 | 18.65 | 31.13 | |||||||||||||
1960 | 12.32 | 10.62 | 21.16 | 30.33 | 37.55 | 48.80 | 52.29 | 51.48 | 44.57 | 34.45 | 23.03 | a | 16.03 | 31.89 | ||||||||||||
1961 | 15.45 | 19.07 | 21.06 | 26.63 | 38.32 | 47.17 | 51.52 | 52.71 | 38.63 | 32.39 | 20.17 | 11.68 | 31.23 | |||||||||||||
1962 | 6.39 | 15.64 | 17.10 | 30.27 | 39.81 | 45.90 | 49.61 | 49.71 | 39.93 | a | 35.42 | 24.57 | 16.16 | 30.88 | ||||||||||||
1963 | -0.87 | a | 19.07 | 20.23 | a | 26.90 | a | 37.94 | 46.40 | 55.13 | 53.35 | 47.97 | 38.03 | a | 24.67 | 13.23 | 31.84 | |||||||||
1964 | 14.57 | a | 10.31 | 13.58 | 27.63 | 38.94 | 45.23 | 54.55 | 47.77 | 39.73 | 31.23 | 21.30 | 13.33 | a | 29.85 | |||||||||||
1965 | 16.90 | a | 11.04 | a | 8.71 | 30.37 | 37.00 | 46.07 | 52.55 | 48.58 | 36.27 | 35.90 | 27.20 | 17.87 | 30.70 | |||||||||||
1966 | 13.10 | 13.22 | a | 22.65 | 24.13 | 37.71 | 46.57 | 57.16 | 50.84 | 45.11 | b | 30.90 | 23.50 | 16.71 | 31.80 | |||||||||||
1967 | 17.81 | 17.78 | e | 25.07 | a | 29.27 | 36.00 | 46.27 | 52.94 | 49.74 | 44.23 | 34.16 | 20.57 | 11.61 | 32.12 | |||||||||||
1968 | 14.74 | 19.59 | 22.61 | 25.63 | 34.52 | 47.00 | 51.71 | 48.90 | 40.23 | 34.39 | 20.10 | 13.16 | 31.05 | |||||||||||||
1969 | 15.90 | a | 16.89 | 15.32 | 32.43 | 39.97 | 43.97 | 53.29 | 53.87 | 46.20 | 26.26 | 23.33 | 22.16 | 32.47 | ||||||||||||
1970 | 22.74 | 31.32 | 20.48 | 25.00 | 38.35 | 45.07 | 53.13 | 54.71 | 40.07 | 26.74 | 23.73 | 15.65 | 33.08 | |||||||||||||
1971 | 18.81 | 14.07 | 20.42 | 27.87 | 36.16 | 47.43 | 50.35 | 50.35 | 38.40 | 29.81 | 22.20 | 15.74 | 30.97 | |||||||||||||
1972 | 10.81 | 18.17 | 23.97 | 28.23 | 36.71 | 48.40 | 48.97 | 50.03 | 41.80 | 31.97 | 19.27 | 11.17 | a | 30.79 | ||||||||||||
1973 | 12.58 | 16.00 | 21.77 | 24.70 | 35.06 | 46.30 | 52.00 | 53.39 | 41.55 | a | 35.68 | 23.37 | 16.61 | 31.58 | ||||||||||||
1974 | 12.84 | ----- | z | 25.39 | 29.40 | 38.35 | 47.83 | 54.00 | 48.00 | 40.07 | 35.03 | 23.70 | 15.71 | 33.67 | a | |||||||||||
1975 | 13.71 | 12.79 | 19.63 | a | 24.11 | b | 35.03 | 44.47 | 53.00 | 50.43 | a | 39.57 | 32.97 | 21.23 | 20.23 | 30.60 | ||||||||||
1976 | 15.61 | 20.25 | a | 18.61 | 30.83 | 37.97 | 44.77 | 54.81 | 51.47 | a | 44.60 | 28.29 | 20.24 | a | 17.45 | 32.07 | ||||||||||
1977 | 8.61 | 19.89 | 13.16 | 31.10 | 37.74 | 51.07 | 49.81 | 50.71 | 40.87 | 33.48 | 17.57 | 15.65 | 30.80 | |||||||||||||
1978 | 9.77 | 13.00 | 22.32 | 31.23 | 35.97 | 45.60 | 52.74 | 49.48 | 43.00 | 31.90 | 20.27 | 8.90 | b | 30.35 | ||||||||||||
1979 | 1.97 | 17.68 | 22.74 | 29.93 | a | 37.00 | 45.87 | 52.94 | 51.10 | 44.41 | a | 34.87 | 16.57 | 17.87 | 31.08 | |||||||||||
1980 | 7.57 | a | 14.93 | 18.23 | 29.43 | 37.87 | 47.50 | 55.23 | 49.16 | 42.57 | 32.00 | 22.83 | 23.84 | 31.76 | ||||||||||||
1981 | 18.13 | 17.07 | 22.97 | 32.33 | 37.40 | a | 46.93 | 53.77 | 50.10 | 43.60 | 31.48 | 24.03 | 17.90 | 32.98 | ||||||||||||
1982 | 9.77 | 13.32 | 20.74 | 24.20 | 35.81 | 43.50 | 50.19 | 52.90 | 40.10 | 31.29 | 18.73 | 18.71 | 29.94 | |||||||||||||
1983 | 19.10 | 19.64 | 23.16 | 23.63 | 34.52 | b | 44.97 | 53.55 | 56.16 | 42.93 | 32.67 | a | 21.27 | 4.30 | a | 31.32 | ||||||||||
1984 | 11.96 | d | 16.86 | a | 21.48 | 25.59 | a | 37.65 | 45.80 | 53.70 | a | 53.23 | 39.20 | 28.60 | a | 20.81 | c | 12.97 | 30.65 | |||||||
1985 | 8.79 | b | 9.93 | 21.19 | 30.69 | a | 39.87 | 45.21 | a | 53.23 | a | 48.90 | b | 39.00 | a | 29.45 | 14.41 | a | 9.33 | a | 29.17 | |||||
1986 | 21.61 | 16.85 | b | 27.06 | 30.00 | b | 35.58 | 47.53 | 50.61 | 50.23 | 40.79 | a | 30.00 | a | 19.97 | 13.71 | 32.00 | |||||||||
1987 | 13.94 | 18.46 | b | 19.87 | 29.90 | a | 39.77 | 46.03 | 50.73 | a | 48.35 | 39.40 | 27.57 | a | 21.73 | 12.10 | 30.65 | |||||||||
1988 | 6.61 | 12.68 | a | 18.65 | 26.17 | 38.06 | 50.20 | 51.10 | 51.03 | 40.11 | b | 32.39 | 21.03 | 14.61 | 30.22 | |||||||||||
1989 | 15.81 | 6.00 | a | 21.67 | a | 28.17 | 37.87 | 44.03 | 52.42 | 49.58 | 42.30 | 33.35 | 23.93 | 9.60 | a | 30.39 | ||||||||||
1990 | 18.61 | 17.00 | 21.66 | b | 29.80 | 35.47 | a | 48.50 | 51.94 | 50.65 | 46.77 | 30.58 | 25.40 | 6.97 | 31.94 | |||||||||||
1991 | 11.84 | 22.29 | 22.97 | a | 28.43 | 38.47 | a | 49.00 | 52.48 | 52.82 | c | 41.86 | a | 29.94 | 19.83 | 16.93 | a | 32.24 | ||||||||
1992 | 16.90 | a | 22.76 | 26.03 | 32.17 | a | 38.87 | a | 46.23 | 50.39 | 48.61 | 42.69 | a | 32.58 | 19.03 | a | 11.32 | 32.30 | ||||||||
1993 | 12.00 | d | 12.14 | 24.77 | a | 29.07 | 38.97 | 43.21 | a | 48.90 | 49.77 | 38.77 | 29.39 | 14.90 | a | 17.26 | 29.93 | |||||||||
1994 | 16.71 | 11.18 | 24.42 | 29.37 | 40.19 | 48.40 | 50.65 | 52.19 | 43.50 | 31.17 | b | 18.59 | a | 18.19 | 32.05 | |||||||||||
1995 | 14.24 | b | 17.44 | a | 20.42 | 24.50 | 34.29 | 43.67 | 50.03 | 52.61 | 40.32 | b | 27.93 | a | 22.17 | 14.72 | b | 30.20 | ||||||||
1996 | 8.90 | b | 14.79 | 15.87 | 27.21 | a | 36.80 | a | 45.67 | 51.69 | b | 47.61 | 39.77 | 28.93 | b | 17.79 | a | 12.45 | 28.96 | |||||||
1997 | 9.81 | 13.39 | 20.47 | a | 21.87 | 35.77 | 46.93 | a | 49.93 | a | 49.50 | a | 43.38 | a | 29.74 | 17.67 | 14.26 | 29.39 | ||||||||
1998 | 14.04 | d | 20.44 | a | 20.32 | 27.83 | a | 38.45 | b | 41.21 | b | 52.70 | a | 50.97 | 45.00 | 30.73 | a | 24.50 | 10.87 | 31.42 | ||||||
1999 | 14.64 | c | 18.70 | a | 18.47 | a | 23.37 | 33.03 | 40.80 | 49.42 | 47.17 | a | 33.48 | a | 29.90 | b | 26.62 | a | 19.87 | 29.62 | ||||||
2000 | 18.16 | 21.63 | b | 24.94 | 29.18 | b | 41.10 | 45.90 | 54.87 | a | 54.35 | 42.50 | 32.81 | 13.47 | 10.93 | a | 32.49 | |||||||||
2001 | 14.77 | 14.46 | 22.87 | 30.47 | 38.66 | b | 47.00 | b | 54.73 | a | 51.61 | c | 43.87 | 30.61 | 23.33 | 15.72 | b | 32.34 | ||||||||
2002 | 11.21 | b | 13.30 | a | 15.00 | 28.24 | a | 34.90 | 49.40 | 54.70 | a | 48.97 | 43.23 | 25.21 | b | 21.20 | 17.60 | a | 30.25 | |||||||
2003 | 18.47 | a | 10.96 | a | 23.50 | a | 31.50 | 38.35 | 43.53 | 55.30 | a | 52.10 | 38.67 | 32.83 | a | 18.29 | b | 14.13 | a | 31.47 | ||||||
2004 | 15.63 | a | 13.68 | a | 24.45 | 28.67 | f | 37.77 | 43.13 | 49.40 | a | 46.24 | b | 40.93 | 31.52 | 20.57 | 17.50 | a | 30.98 | a | ||||||
2005 | 16.06 | 17.14 | 20.94 | 27.00 | 34.71 | 45.17 | a | 52.13 | 47.19 | 42.14 | a | ----- | z | ----- | z | ----- | z | 33.61 | c | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.30 | 15.90 | 20.42 | 28.12 | 37.42 | 46.28 | 52.40 | 50.87 | 42.02 | 31.78 | 21.26 | 15.21 | 31.23 | |||||||||||||
S.D. | 4.90 | 4.25 | 3.64 | 2.79 | 1.95 | 2.22 | 1.99 | 2.20 | 2.67 | 2.61 | 3.29 | 3.94 | 1.07 | |||||||||||||
SKEW | -0.60 | 0.65 | -0.46 | 0.06 | -0.13 | -0.13 | 0.17 | 0.06 | -0.24 | -0.14 | 0.08 | -0.30 | -0.04 | |||||||||||||
MAX | 23.77 | 31.32 | 29.35 | 36.27 | 42.03 | 51.07 | 57.16 | 56.16 | 47.97 | 38.03 | 30.27 | 23.84 | 33.86 | |||||||||||||
MIN | -0.87 | 6.00 | 8.71 | 21.87 | 33.03 | 40.80 | 48.90 | 46.24 | 33.48 | 25.21 | 13.47 | 4.30 | 28.96 | |||||||||||||
YRS | 60 | 60 | 62 | 63 | 64 | 64 | 64 | 64 | 64 | 61 | 58 | 60 | 55 |