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 | 43.93 | b | ----- | z | ----- | z | 65.03 | 62.69 | 49.30 | b | 43.63 | 36.93 | h | 22.71 | e | 47.88 | f | |||
1928 | 27.17 | a | 28.64 | 37.87 | 40.53 | 55.84 | 57.58 | j | 66.29 | 62.83 | b | 56.73 | 44.97 | 35.25 | 22.75 | c | 43.53 | a | ||||||||
1929 | 19.44 | d | 22.45 | 36.48 | 41.07 | ----- | z | 56.28 | 65.37 | 67.16 | 53.12 | 46.69 | 33.16 | b | 33.23 | 43.13 | a | |||||||||
1930 | 15.95 | 34.54 | 39.44 | 49.25 | 50.32 | 55.85 | 66.69 | 65.65 | 55.65 | 42.00 | 31.53 | 22.72 | b | 44.13 | ||||||||||||
1931 | 26.68 | 29.58 | b | 36.98 | 45.27 | 55.23 | 57.33 | 67.50 | 65.40 | 53.28 | 44.71 | 30.12 | 23.11 | 44.60 | ||||||||||||
1932 | 23.10 | ----- | z | 36.76 | 44.60 | 50.69 | 59.62 | 61.77 | 61.79 | b | 55.98 | 44.74 | 36.35 | 19.87 | 45.03 | a | ||||||||||
1933 | 22.34 | 19.05 | 33.55 | 42.97 | 47.34 | 60.40 | 67.00 | 64.77 | 53.63 | 50.03 | 34.95 | 34.31 | 44.20 | |||||||||||||
1934 | 32.35 | 37.20 | 45.10 | 52.75 | 57.68 | 58.83 | 66.84 | 68.48 | 55.60 | 47.29 | 38.93 | 26.35 | 48.95 | |||||||||||||
1935 | 24.33 | b | 28.86 | 33.37 | 42.45 | 51.69 | 59.41 | b | 65.69 | 65.23 | 61.65 | 44.69 | 27.50 | a | 24.22 | b | 44.09 | |||||||||
1936 | 24.73 | 21.45 | 32.71 | b | 48.98 | b | 57.76 | 60.05 | a | 68.58 | a | 67.69 | 56.32 | 49.32 | 32.82 | 29.15 | 45.80 | |||||||||
1937 | 10.74 | 26.20 | 37.69 | 42.37 | 54.24 | 59.43 | 68.02 | 63.05 | 59.85 | 48.39 | 37.64 | b | 30.73 | 44.86 | ||||||||||||
1938 | 28.66 | 31.61 | 34.73 | 46.10 | 52.65 | 62.13 | 69.15 | 64.08 | 62.88 | 47.21 | 29.18 | b | 28.18 | 46.38 | ||||||||||||
1939 | 27.56 | 25.20 | 37.53 | 47.98 | 55.08 | 56.43 | ----- | z | 68.82 | 58.87 | ----- | z | 36.57 | ----- | z | 46.01 | c | |||||||||
1940 | 27.81 | ----- | z | 39.39 | 45.72 | 56.74 | 64.30 | 67.68 | 68.32 | 58.08 | ----- | z | 30.60 | d | 28.50 | 48.71 | b | |||||||||
1941 | 28.74 | 31.46 | 39.10 | ----- | z | ----- | z | 58.05 | 68.63 | a | 64.65 | 52.00 | ----- | z | 35.85 | 30.03 | b | 45.39 | c | |||||||
1942 | 21.24 | 25.86 | 33.37 | 46.08 | 48.34 | 54.62 | 67.69 | 66.65 | 58.45 | 46.92 | 32.11 | b | 27.53 | 44.07 | ||||||||||||
1943 | 21.95 | b | 28.12 | 30.00 | 46.07 | 47.29 | 53.22 | 65.41 | b | 62.65 | a | 61.40 | 47.56 | 34.45 | a | 27.19 | 43.78 | |||||||||
1944 | 20.26 | 27.52 | 31.86 | b | 42.72 | a | 51.79 | 55.05 | 65.83 | a | 62.97 | 58.63 | 50.23 | 30.88 | 22.37 | a | 43.34 | |||||||||
1945 | 25.97 | 29.82 | 32.53 | 41.23 | 52.02 | 56.95 | 68.71 | 66.08 | 53.77 | 48.58 | 30.95 | ----- | z | 46.06 | a | |||||||||||
1946 | 22.61 | d | 27.27 | 36.43 | a | 46.18 | 53.45 | 57.03 | 66.08 | 65.92 | 55.12 | 39.26 | 31.82 | 29.34 | 44.21 | |||||||||||
1947 | 20.55 | 32.16 | 40.81 | 46.10 | 58.84 | 56.23 | 68.33 | a | 64.55 | 58.70 | 47.85 | 32.98 | 26.50 | a | 46.13 | |||||||||||
1948 | 25.31 | 27.47 | 32.73 | 41.30 | 51.56 | 63.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.30 | 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 | 23.69 | 28.13 | 36.12 | 44.94 | 53.08 | 58.23 | 66.82 | 65.21 | 56.62 | 46.34 | 33.18 | 26.78 | 44.96 | |||||||||||||
S.D. | 4.83 | 4.39 | 3.59 | 3.14 | 3.47 | 2.91 | 1.73 | 2.11 | 3.44 | 2.86 | 3.00 | 3.94 | 1.52 | |||||||||||||
SKEW | -0.77 | -0.08 | 0.50 | 0.61 | -0.07 | 0.44 | -1.09 | 0.16 | -0.09 | -0.80 | 0.12 | 0.14 | 1.48 | |||||||||||||
MAX | 32.35 | 37.20 | 45.10 | 52.75 | 58.84 | 64.30 | 69.15 | 68.82 | 62.88 | 50.23 | 38.93 | 34.31 | 48.95 | |||||||||||||
MIN | 10.74 | 19.05 | 30.00 | 40.53 | 47.29 | 53.22 | 61.77 | 61.79 | 49.30 | 39.26 | 27.50 | 19.87 | 43.34 | |||||||||||||
YRS | 21 | 19 | 21 | 21 | 19 | 20 | 20 | 21 | 21 | 18 | 20 | 19 | 13 |