YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 33.29 | b | ----- | z | ----- | z | 52.23 | 51.06 | 41.11 | b | 36.32 | 30.27 | d | 15.59 | b | 37.12 | e | |||
1928 | 22.43 | a | 22.07 | 30.65 | 31.07 | 43.87 | 45.04 | b | 55.39 | 50.65 | 45.27 | 37.48 | 29.27 | 17.28 | b | 35.87 | ||||||||||
1929 | 13.17 | b | 14.00 | 28.55 | 31.47 | ----- | z | 45.17 | 53.00 | 54.52 | 42.40 | 38.97 | 26.55 | a | 28.29 | 34.19 | a | |||||||||
1930 | 8.00 | 27.21 | 30.87 | 38.60 | 40.74 | 43.80 | 54.68 | 53.58 | 46.20 | 33.90 | 24.57 | 16.53 | a | 34.89 | ||||||||||||
1931 | 20.42 | 21.04 | a | 28.23 | 34.17 | 42.39 | 44.83 | 54.45 | 51.71 | 42.20 | 35.84 | 23.47 | 17.06 | 34.65 | ||||||||||||
1932 | 16.10 | ----- | z | 28.32 | 34.40 | 39.58 | 48.17 | 49.13 | 49.27 | a | 44.43 | 36.39 | 30.60 | 13.87 | 35.48 | a | ||||||||||
1933 | 15.29 | 11.04 | 25.00 | 32.70 | 36.74 | 49.23 | 54.23 | 53.16 | 42.47 | 40.16 | 29.47 | 28.65 | 34.84 | |||||||||||||
1934 | 26.55 | 30.50 | 34.32 | 41.73 | 45.87 | 47.70 | 53.97 | 55.87 | 44.37 | 38.71 | 32.90 | 20.16 | 39.39 | |||||||||||||
1935 | 16.97 | a | 20.54 | 24.13 | 32.47 | 40.52 | 46.70 | 54.06 | 52.55 | 49.00 | 35.23 | 21.45 | a | 19.13 | a | 34.39 | ||||||||||
1936 | 18.74 | 13.17 | 24.21 | b | 37.21 | a | 46.29 | 49.73 | 55.77 | a | 54.97 | 44.47 | 39.16 | 25.73 | 22.45 | 35.99 | ||||||||||
1937 | 3.06 | 17.50 | 29.65 | 32.23 | 41.35 | 48.90 | 55.42 | 50.16 | 48.33 | 39.87 | 31.76 | a | 25.26 | 35.29 | ||||||||||||
1938 | 22.23 | 23.96 | 26.84 | 36.03 | 41.45 | 50.97 | 57.55 | 51.84 | 52.00 | 38.97 | 22.97 | a | 22.03 | 37.24 | ||||||||||||
1939 | 20.81 | 17.11 | 28.58 | 35.90 | 43.45 | 45.50 | ----- | z | 56.39 | 47.67 | ----- | z | 29.93 | ----- | z | 36.15 | c | |||||||||
1940 | 21.81 | ----- | z | 30.84 | 36.50 | 45.94 | 52.10 | 56.03 | 56.35 | 49.97 | ----- | z | 24.25 | b | 22.94 | 39.67 | b | |||||||||
1941 | 24.03 | 24.61 | 29.84 | ----- | z | ----- | z | 48.57 | 57.23 | a | 54.68 | 43.13 | ----- | z | 29.67 | 23.67 | a | 37.27 | c | |||||||
1942 | 15.13 | 17.93 | 24.06 | 36.03 | 39.03 | 43.77 | 55.10 | 54.03 | 46.50 | 37.68 | 26.31 | a | 22.19 | 34.81 | ||||||||||||
1943 | 13.97 | a | 20.29 | 20.03 | 35.93 | 36.35 | 42.63 | 53.35 | 49.74 | 49.60 | 38.19 | 28.43 | 22.13 | 34.22 | ||||||||||||
1944 | 14.65 | 19.93 | 21.80 | a | 33.03 | a | 39.87 | 44.00 | 53.07 | a | 49.71 | 47.03 | 40.68 | 24.73 | 17.43 | a | 33.83 | |||||||||
1945 | 20.81 | 22.75 | 23.35 | 30.90 | 41.55 | 44.43 | 54.42 | 53.35 | 42.40 | 39.81 | 25.20 | ----- | z | 36.27 | a | |||||||||||
1946 | 16.90 | b | 19.82 | 27.58 | 34.60 | 42.10 | 45.53 | 53.29 | 53.13 | 44.33 | 31.26 | 26.03 | 23.84 | 34.87 | ||||||||||||
1947 | 14.10 | 24.71 | 31.90 | 35.60 | 46.48 | 45.87 | 55.07 | a | 51.71 | 47.00 | 40.42 | 27.27 | 20.33 | a | 36.71 | |||||||||||
1948 | 18.84 | 19.76 | 24.16 | 31.87 | 41.68 | 52.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.54 | f | ||||||
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 | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.33 | 20.42 | 27.28 | 34.56 | 41.86 | 46.93 | 54.37 | 52.78 | 45.71 | 37.72 | 27.18 | 20.99 | 35.50 | |||||||||||||
S.D. | 5.41 | 4.79 | 3.66 | 2.72 | 2.96 | 2.92 | 1.84 | 2.22 | 2.99 | 2.51 | 3.12 | 4.09 | 1.47 | |||||||||||||
SKEW | -0.76 | 0.00 | -0.13 | 0.77 | -0.03 | 0.53 | -0.83 | 0.05 | 0.34 | -1.02 | 0.04 | 0.17 | 1.41 | |||||||||||||
MAX | 26.55 | 30.50 | 34.32 | 41.73 | 46.48 | 52.97 | 57.55 | 56.39 | 52.00 | 40.68 | 32.90 | 28.65 | 39.39 | |||||||||||||
MIN | 3.06 | 11.04 | 20.03 | 30.90 | 36.35 | 42.63 | 49.13 | 49.27 | 41.11 | 31.26 | 21.45 | 13.87 | 33.83 | |||||||||||||
YRS | 21 | 19 | 21 | 21 | 19 | 21 | 20 | 21 | 21 | 18 | 21 | 19 | 14 |