YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.53 | a | 80.03 | 67.23 | 53.03 | 41.63 | 19.23 | 58.45 | f | |||||
1917 | 13.32 | 12.25 | 32.06 | 49.03 | 65.00 | 72.40 | 81.81 | 77.45 | 69.17 | 45.74 | 44.55 | a | 15.32 | 48.18 | ||||||||||||
1918 | 9.55 | 22.76 | c | 47.94 | 54.20 | 69.87 | 76.20 | 80.65 | 80.23 | 65.90 | 58.65 | 43.77 | 31.90 | 53.47 | ||||||||||||
1919 | 27.74 | 22.76 | c | 38.87 | a | 53.43 | 68.35 | 77.70 | 83.58 | 79.77 | 72.93 | 51.19 | 32.63 | 16.03 | a | 52.08 | ||||||||||
1920 | 13.87 | 23.31 | 40.42 | 47.90 | 70.19 | 77.37 | 80.81 | 79.77 | 74.13 | 63.84 | 37.73 | 27.48 | 53.07 | |||||||||||||
1921 | 28.23 | 33.57 | 44.13 | a | 61.48 | c | 70.00 | a | 80.48 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.48 | 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 | 87.39 | 80.10 | 71.50 | 56.94 | 38.86 | a | 34.74 | 61.59 | f | |||||
1958 | 29.47 | a | 25.56 | a | 39.90 | 59.10 | a | 76.55 | b | 73.83 | 80.68 | c | 83.55 | 74.93 | c | 67.00 | c | 45.81 | c | 25.16 | 56.80 | |||||
1959 | 21.39 | 27.86 | 47.19 | 61.87 | 72.55 | 81.87 | 85.87 | 84.74 | 74.83 | 53.52 | 33.37 | 36.97 | a | 56.83 | ||||||||||||
1960 | 22.90 | b | 24.96 | a | 30.19 | 55.43 | 70.10 | 77.73 | 84.42 | 83.35 | 73.07 | 63.72 | b | 44.50 | 28.84 | 54.94 | ||||||||||
1961 | 26.55 | 36.50 | 45.65 | 50.80 | 68.17 | a | 82.57 | 82.52 | 85.67 | a | 71.07 | 63.71 | 42.86 | a | 23.94 | 56.67 | ||||||||||
1962 | 20.03 | 21.23 | b | 34.81 | 55.13 | 71.38 | b | 77.38 | a | 78.61 | 81.20 | a | 69.70 | 64.40 | a | 46.00 | 30.61 | 54.21 | ||||||||
1963 | 13.71 | 25.79 | 44.32 | 59.70 | 66.37 | a | 81.60 | 82.87 | a | 80.77 | 74.80 | 71.74 | 48.43 | 19.71 | 55.82 | |||||||||||
1964 | 29.40 | a | 36.66 | 35.77 | a | 58.28 | a | 73.80 | a | 81.97 | 89.45 | 80.90 | 74.38 | i | 61.03 | a | 45.40 | 22.35 | 55.91 | a | ||||||
1965 | 20.00 | 22.89 | a | 27.93 | a | 51.00 | a | 70.00 | c | 79.47 | 83.23 | a | 82.03 | 61.55 | a | 64.00 | 42.67 | 34.55 | 53.28 | |||||||
1966 | 13.32 | ----- | z | 46.29 | 51.83 | 68.65 | 80.70 | 88.13 | a | 79.10 | 74.10 | 62.32 | 38.40 | 25.97 | 57.16 | a | ||||||||||
1967 | 25.94 | 22.29 | 40.58 | 56.47 | 67.50 | c | 76.57 | 82.29 | 81.03 | a | 74.23 | 61.36 | c | 43.09 | g | 30.66 | b | 56.26 | a | |||||||
1968 | 25.58 | 27.86 | 54.39 | 62.97 | 67.00 | 78.32 | b | 82.45 | ----- | z | 72.70 | 61.45 | 41.27 | 24.42 | 54.40 | a | ||||||||||
1969 | 17.97 | b | 28.72 | c | 33.58 | 59.53 | 72.70 | a | 71.50 | b | 83.94 | 86.61 | 75.93 | 56.10 | 41.60 | 27.19 | 54.61 | |||||||||
1970 | 15.00 | 27.21 | 34.43 | a | 56.67 | c | 73.76 | b | 83.40 | 87.19 | 83.48 | 73.30 | 59.19 | 38.97 | 26.00 | 54.88 | ||||||||||
1971 | 16.19 | 27.14 | 38.06 | 61.97 | 70.80 | a | 83.20 | 80.37 | a | 83.50 | a | 74.97 | 63.87 | 40.90 | 25.39 | 55.53 | ||||||||||
1972 | 17.61 | 22.17 | 36.84 | 54.10 | a | 73.23 | 80.63 | 80.94 | 80.65 | 71.93 | 57.55 | 39.07 | 21.58 | 53.02 | ||||||||||||
1973 | 27.42 | 32.29 | 48.53 | a | 57.70 | 70.06 | 83.10 | 83.97 | 83.19 | 71.23 | 66.81 | 43.83 | 25.26 | 57.78 | ||||||||||||
1974 | 22.16 | 28.07 | 38.77 | 59.00 | 66.16 | 79.20 | 88.84 | 78.48 | 73.30 | 65.23 | 41.27 | 31.29 | 55.98 | |||||||||||||
1975 | 24.19 | 24.96 | 32.32 | 45.27 | 74.03 | 77.97 | 87.48 | 82.68 | 70.70 | 65.77 | 46.90 | 27.06 | 54.95 | |||||||||||||
1976 | 21.81 | 36.48 | 41.77 | 65.70 | 73.55 | 84.43 | ----- | z | 85.94 | 78.20 | 57.26 | 37.87 | 22.55 | 55.05 | a | |||||||||||
1977 | 9.87 | 34.29 | 45.67 | a | 66.73 | 79.50 | a | 81.43 | 86.83 | a | 78.97 | 72.43 | 60.58 | 39.63 | 21.84 | 56.48 | ||||||||||
1978 | 16.39 | 22.29 | 39.97 | 54.97 | 73.90 | 80.20 | 82.10 | 83.45 | 79.34 | a | 63.87 | a | 41.72 | a | 24.83 | a | 55.25 | |||||||||
1979 | 10.97 | 18.64 | 34.19 | 50.73 | 68.06 | 80.23 | 83.03 | 78.97 | 76.00 | 59.35 | 39.83 | 33.97 | 52.83 | |||||||||||||
1980 | 25.87 | 26.28 | 38.23 | 64.97 | 77.77 | 80.80 | 89.10 | 82.81 | 74.60 | 57.87 | 49.00 | 29.52 | 58.07 | |||||||||||||
1981 | 31.84 | 34.89 | 54.03 | 64.07 | 71.84 | 79.77 | 84.84 | 80.13 | 73.50 | 57.74 | 48.43 | 24.39 | 58.79 | |||||||||||||
1982 | 11.84 | 25.18 | 36.20 | a | 55.67 | 71.35 | 75.00 | 85.29 | 83.32 | 71.27 | 59.94 | 36.97 | 32.06 | 53.67 | ||||||||||||
1983 | 28.39 | 31.64 | 40.13 | 52.00 | 66.19 | 77.60 | 87.40 | a | 88.06 | 72.27 | 56.97 | a | 37.83 | a | 9.87 | 54.03 | ||||||||||
1984 | 22.32 | c | 33.41 | 33.84 | 57.63 | 67.29 | 80.30 | 83.68 | 84.68 | 69.17 | 59.97 | 42.47 | 26.43 | a | 55.10 | |||||||||||
1985 | 19.71 | 24.00 | 44.16 | 63.59 | a | 75.29 | 75.20 | 84.10 | 75.90 | a | 69.23 | 57.23 | 32.17 | 18.37 | a | 53.24 | ||||||||||
1986 | 26.17 | a | 22.00 | 42.87 | 59.27 | 69.18 | c | 80.23 | 81.77 | 77.13 | 68.40 | 59.26 | 36.47 | 32.03 | 54.56 | |||||||||||
1987 | 28.42 | 41.32 | 45.94 | 66.70 | 74.94 | 83.90 | 84.35 | 77.94 | 72.97 | 53.58 | 45.63 | 29.13 | 58.73 | |||||||||||||
1988 | 17.81 | 21.50 | a | 41.13 | 56.80 | 78.13 | 87.07 | 87.81 | 84.26 | 72.67 | 54.52 | 38.03 | 27.61 | 55.61 | ||||||||||||
1989 | 29.84 | 16.46 | 32.23 | 54.33 | 68.77 | a | 78.23 | 84.35 | 80.29 | 70.20 | 62.00 | 35.97 | 18.06 | 52.56 | ||||||||||||
1990 | 33.29 | 30.85 | a | 42.32 | 57.40 | 64.40 | a | 77.87 | 79.90 | 77.61 | 73.23 | 57.52 | 45.40 | 22.68 | 55.21 | |||||||||||
1991 | 19.35 | 33.54 | 40.03 | 57.97 | 67.26 | 80.83 | 81.26 | 80.00 | 67.87 | 56.52 | 29.83 | 27.40 | a | 53.49 | ||||||||||||
1992 | 27.23 | 31.00 | a | 40.58 | 49.80 | 71.83 | a | 75.03 | a | 73.83 | a | 75.03 | 69.83 | 57.52 | 33.86 | a | 25.65 | 52.60 | ||||||||
1993 | 20.07 | a | 21.74 | a | 35.00 | 52.00 | 65.03 | 72.27 | 77.26 | 79.39 | 64.80 | 55.61 | 34.93 | 24.81 | 50.24 | |||||||||||
1994 | 10.70 | a | 18.96 | 40.06 | 55.33 | 72.52 | 79.50 | 79.23 | 76.39 | 72.80 | 60.13 | 45.21 | a | 29.20 | a | 53.34 | ||||||||||
1995 | 22.67 | a | 26.68 | 40.40 | a | 48.67 | 65.23 | 81.10 | a | 82.58 | 81.39 | 69.70 | 55.55 | 31.59 | a | 24.06 | 52.47 | |||||||||
1996 | 15.10 | 23.03 | 31.26 | 50.37 | 63.52 | 78.30 | 79.68 | 79.84 | 70.73 | 58.27 | a | 30.00 | 18.06 | 49.85 | ||||||||||||
1997 | 15.65 | 26.71 | 34.97 | 51.97 | 64.30 | a | 81.87 | 78.45 | 76.94 | 72.83 | 59.97 | 31.45 | a | 30.90 | 52.17 | |||||||||||
1998 | 22.73 | a | 35.14 | 36.71 | 60.33 | 76.17 | a | 74.33 | 81.29 | 80.55 | 78.10 | 60.32 | 42.53 | 32.58 | 56.73 | |||||||||||
1999 | 17.97 | b | 33.96 | a | 42.39 | 56.03 | 67.81 | 76.23 | 84.90 | 79.03 | 71.10 | 60.50 | a | 51.13 | 33.97 | 56.25 | ||||||||||
2000 | 22.90 | 34.86 | 52.06 | 58.40 | 72.13 | 78.30 | 84.39 | 81.06 | 73.73 | 62.37 | a | 35.46 | b | 15.62 | b | 55.94 | ||||||||||
2001 | 26.69 | b | 18.20 | c | 33.58 | 55.69 | a | 69.48 | 79.83 | 85.71 | 83.90 | 70.27 | 58.52 | 54.27 | 32.41 | b | 55.71 | |||||||||
2002 | 31.46 | c | 36.04 | 30.87 | a | 54.55 | a | 64.42 | 80.83 | 85.06 | 78.61 | 74.37 | 48.07 | a | 39.70 | 34.07 | a | 54.84 | ||||||||
2003 | 22.45 | b | 22.89 | 40.86 | b | 58.20 | 67.77 | 77.80 | 82.19 | 84.35 | 73.52 | a | 62.13 | a | 36.13 | 30.38 | b | 54.89 | ||||||||
2004 | 21.19 | d | 27.46 | c | 44.90 | a | 61.93 | 66.58 | 73.57 | 79.94 | 74.39 | 77.07 | a | 60.38 | b | 44.86 | a | 29.42 | e | 55.14 | ||||||
2005 | 20.97 | b | 33.25 | 40.47 | a | 61.67 | 63.83 | a | 81.60 | 84.90 | 80.68 | 75.80 | 61.10 | 44.83 | a | 23.45 | b | 56.04 | ||||||||
2006 | 32.31 | b | 25.63 | a | 39.42 | 61.77 | 69.55 | 80.30 | 87.87 | 80.58 | 68.41 | a | 56.03 | 45.80 | 33.87 | 56.80 | ||||||||||
2007 | 25.90 | 19.57 | 42.87 | 55.13 | 74.39 | 81.77 | 85.48 | 80.00 | a | 75.77 | 62.10 | 42.13 | 21.00 | 55.51 | ||||||||||||
2008 | 18.71 | 21.69 | 35.00 | 52.68 | b | 66.06 | 77.10 | 83.81 | 81.35 | 72.57 | 58.16 | 41.50 | 22.14 | b | 52.56 | |||||||||||
2009 | 15.47 | a | 27.63 | a | 37.55 | 56.07 | 71.23 | 76.10 | 78.84 | 77.81 | 75.80 | 47.87 | h | ----- | z | ----- | z | 57.39 | c | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.50 | 27.04 | 39.73 | 56.70 | 70.10 | 78.99 | 83.48 | 80.86 | 72.31 | 59.46 | 40.77 | 26.21 | 54.62 | |||||||||||||
S.D. | 6.28 | 6.09 | 5.86 | 4.97 | 3.92 | 3.26 | 3.32 | 2.91 | 3.32 | 4.55 | 5.42 | 5.79 | 2.16 | |||||||||||||
SKEW | -0.09 | 0.13 | 0.39 | 0.04 | 0.33 | -0.22 | -0.24 | 0.13 | -0.62 | -0.35 | -0.06 | -0.43 | -0.53 | |||||||||||||
MAX | 33.29 | 41.32 | 54.39 | 66.73 | 79.50 | 87.07 | 89.53 | 88.06 | 79.34 | 71.74 | 54.27 | 36.97 | 58.79 | |||||||||||||
MIN | 9.55 | 12.25 | 27.93 | 45.27 | 63.52 | 71.50 | 73.83 | 74.39 | 61.55 | 45.74 | 29.83 | 9.87 | 48.18 | |||||||||||||
YRS | 57 | 56 | 57 | 57 | 57 | 56 | 57 | 57 | 57 | 57 | 56 | 57 | 50 |