YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | 9.50 | g | 17.79 | 21.97 | 28.97 | 39.55 | 49.00 | 56.68 | 55.45 | 51.17 | 35.03 | 22.90 | ----- | z | 37.85 | b | ||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.78 | m | 53.23 | 40.81 | i | 31.58 | 22.62 | a | ----- | z | 35.81 | i | ||
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 | 1.31 | o | ----- | z |
1946 | 0.26 | 12.54 | 23.26 | 31.33 | l | 36.19 | 44.76 | a | 52.23 | 55.39 | ----- | z | ----- | z | 20.04 | b | 15.68 | 28.93 | c | |||||||
1947 | -0.42 | 19.25 | 21.74 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 6.17 | g | 13.52 | i | |||
1948 | 9.38 | b | 17.34 | 18.39 | 29.80 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.81 | 17.74 | g | ||||
1949 | 10.90 | b | 10.68 | 22.07 | b | 30.10 | 34.31 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 5.94 | 15.94 | g | |||
1950 | 6.32 | 14.68 | 20.71 | 28.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.47 | 10.38 | b | 16.35 | f | |||||
1951 | 9.26 | 12.71 | 13.87 | 25.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.42 | h | ||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.84 | 4.84 | k | |
1953 | 14.43 | a | 10.67 | a | 22.32 | 26.25 | b | ----- | z | 44.80 | 53.87 | 49.00 | 41.10 | 29.71 | 21.40 | 8.16 | 29.25 | a | ||||||||
1954 | 13.55 | 14.86 | 20.87 | 32.43 | 39.70 | a | 43.37 | 54.32 | 51.10 | 45.60 | 32.03 | 17.93 | 8.35 | 31.18 | ||||||||||||
1955 | 8.16 | 8.82 | 17.29 | 25.10 | 35.61 | 42.27 | 52.81 | 55.48 | 43.43 | 30.45 | 19.47 | 13.58 | 29.37 | |||||||||||||
1956 | 21.61 | 9.86 | 20.32 | 27.23 | 37.58 | 51.30 | 53.81 | 50.84 | 42.37 | 31.35 | 10.07 | 6.06 | 30.20 | |||||||||||||
1957 | 18.74 | 24.46 | 22.61 | 28.10 | 36.55 | 46.93 | 52.81 | 52.58 | 38.79 | a | 35.03 | 18.70 | 11.58 | 32.24 | ||||||||||||
1958 | 9.32 | 21.57 | 22.42 | 27.67 | 40.61 | 47.63 | 50.32 | 54.13 | 42.53 | 31.50 | a | 16.67 | 10.61 | 31.25 | ||||||||||||
1959 | 8.61 | 14.75 | 14.32 | 28.47 | 35.32 | 47.77 | 51.23 | 51.77 | 39.13 | 29.65 | 15.67 | 13.65 | 29.19 | |||||||||||||
1960 | 6.74 | 12.97 | 23.97 | 27.53 | 34.29 | 43.90 | 50.90 | 51.03 | 44.40 | 30.42 | 20.20 | 11.29 | 29.80 | |||||||||||||
1961 | 5.39 | 17.14 | 23.19 | 25.47 | 34.77 | 45.03 | 52.03 | 51.39 | 39.90 | 28.61 | 22.73 | 6.45 | 29.34 | |||||||||||||
1962 | 7.39 | 21.68 | 17.57 | a | 27.90 | 32.16 | 43.67 | 50.77 | 48.84 | 45.53 | 32.65 | 23.63 | 12.61 | 30.37 | ||||||||||||
1963 | 2.26 | 18.93 | 21.61 | 27.73 | 38.16 | 42.03 | 54.23 | 52.84 | 46.30 | 35.06 | 23.23 | 8.39 | 30.90 | |||||||||||||
1964 | 2.45 | 0.64 | a | 17.90 | 26.97 | 39.93 | a | 43.20 | 51.61 | 49.71 | 44.10 | 29.23 | 20.13 | 15.84 | 28.48 | |||||||||||
1965 | 18.10 | 13.68 | 18.26 | 27.47 | 32.42 | 41.57 | 51.06 | 47.81 | 40.97 | 28.03 | 23.17 | 16.42 | 29.91 | |||||||||||||
1966 | 6.45 | 11.68 | 21.39 | 26.40 | 35.65 | 42.00 | 51.10 | 48.74 | 41.53 | 28.84 | 19.40 | 9.13 | 28.53 | |||||||||||||
1967 | 4.32 | 13.82 | 21.93 | a | 24.43 | 31.58 | 44.10 | 52.35 | 47.39 | 41.80 | 27.23 | 17.67 | 3.39 | 27.50 | ||||||||||||
1968 | 4.81 | 19.69 | 21.13 | 23.20 | 32.48 | 40.90 | 48.45 | 47.13 | 36.43 | 26.65 | 17.97 | 5.06 | 26.99 | |||||||||||||
1969 | 17.90 | 14.82 | 16.84 | 27.47 | 36.16 | 40.60 | 52.42 | 51.13 | 42.77 | 30.03 | 19.27 | 16.29 | 30.47 | |||||||||||||
1970 | 10.42 | 16.36 | 16.35 | 21.50 | 33.00 | 42.79 | a | 52.61 | 53.32 | 40.50 | 26.23 | 21.77 | 10.90 | 28.81 | ||||||||||||
1971 | 6.42 | 12.18 | 19.16 | 25.47 | 32.84 | 46.62 | a | 53.45 | 50.84 | 41.00 | 31.90 | 20.33 | 12.45 | 29.39 | ||||||||||||
1972 | 11.77 | 13.93 | 22.48 | 25.53 | 34.06 | 47.10 | 55.10 | 51.84 | 45.33 | 39.29 | 22.50 | 9.81 | 31.56 | |||||||||||||
1973 | 2.90 | 14.50 | 26.16 | 25.57 | 36.55 | 41.73 | 50.81 | 49.87 | ----- | z | 27.00 | 19.43 | 9.97 | 27.68 | a | |||||||||||
1974 | 9.77 | 11.75 | 24.87 | 23.20 | 35.00 | 48.07 | 51.87 | 48.71 | 39.83 | 36.81 | 21.17 | 6.68 | 29.81 | |||||||||||||
1975 | 5.65 | 17.00 | 23.48 | 25.17 | 32.94 | 41.71 | b | 52.45 | 48.94 | 43.20 | 28.26 | 15.67 | 10.35 | 28.73 | ||||||||||||
1976 | 5.47 | a | 20.24 | 17.90 | a | 26.45 | a | 37.62 | b | 42.63 | 52.74 | 49.81 | 44.83 | a | 26.53 | a | 12.77 | 2.30 | a | 28.27 | ||||||
1977 | 2.13 | 13.32 | 20.13 | 30.33 | 35.35 | 47.97 | 54.55 | 52.28 | b | 46.73 | 32.29 | 22.61 | b | 17.67 | a | 31.28 | ||||||||||
1978 | 17.32 | 19.25 | 27.35 | 28.50 | 34.58 | 46.33 | c | 51.92 | f | 48.50 | c | 44.25 | f | 32.84 | 27.33 | 9.55 | 29.16 | b | ||||||||
1979 | 6.52 | 12.39 | 23.90 | 26.82 | b | 38.96 | c | 44.36 | b | 51.77 | a | 48.95 | j | 44.63 | 33.58 | 18.66 | a | 14.19 | 28.71 | a | ||||||
1980 | 23.29 | 22.48 | 21.39 | 26.90 | a | 34.34 | b | 44.43 | b | 52.43 | a | 52.00 | a | 42.76 | a | 26.94 | 17.10 | a | 15.90 | a | 31.66 | |||||
1981 | 10.90 | a | 13.79 | 21.35 | 31.00 | d | 36.97 | a | 45.43 | b | 54.87 | 51.29 | 45.10 | 33.10 | 21.90 | a | 14.94 | 31.72 | ||||||||
1982 | 12.58 | 15.68 | 22.10 | 24.07 | 33.72 | f | 43.47 | 51.77 | a | 54.68 | 47.85 | c | 28.03 | a | 22.21 | a | 14.70 | k | 32.24 | b | ||||||
1983 | 13.55 | 19.79 | 26.07 | b | 24.23 | 33.13 | 43.31 | a | 52.40 | a | 53.68 | 45.97 | 34.97 | a | 22.93 | 17.00 | 32.25 | |||||||||
1984 | 7.84 | 17.86 | 21.45 | 27.31 | a | 39.52 | 45.83 | 52.29 | 50.68 | 43.63 | 31.74 | 21.61 | b | 19.16 | 31.58 | |||||||||||
1985 | 13.74 | 16.79 | 27.61 | 30.53 | 40.94 | 46.63 | 52.00 | 51.71 | 41.23 | 34.68 | 23.27 | 12.16 | 32.61 | |||||||||||||
1986 | 14.74 | 19.00 | 24.71 | 31.48 | a | 37.32 | 47.83 | 51.52 | 53.45 | 43.52 | a | 30.55 | 24.87 | 18.26 | 33.10 | |||||||||||
1987 | 8.13 | a | 19.61 | 22.77 | 28.79 | a | 37.10 | 45.13 | 50.12 | f | 50.39 | h | 40.43 | i | 32.56 | d | 21.87 | 10.48 | 25.16 | c | ||||||
1988 | 4.55 | 20.38 | 19.26 | 29.24 | a | 37.18 | c | 47.21 | f | 53.00 | j | 54.67 | g | 41.20 | j | 32.09 | i | 20.50 | 10.30 | a | 20.20 | e | ||||
1989 | 3.52 | 19.71 | 25.97 | 31.52 | e | 36.05 | i | 46.14 | h | 53.40 | k | 50.57 | h | 41.00 | j | 29.36 | i | 15.70 | 5.80 | a | 17.04 | f | ||||
1990 | 4.16 | 11.21 | 26.97 | 33.90 | a | 37.71 | 46.17 | f | 54.14 | i | 50.39 | h | 47.79 | k | 28.63 | d | 21.60 | 0.52 | 20.59 | d | ||||||
1991 | 6.35 | 17.46 | 23.13 | 25.77 | 33.52 | 43.66 | a | 51.68 | 52.35 | 43.67 | 30.03 | 23.60 | 17.29 | 30.71 | ||||||||||||
1992 | 4.37 | a | 24.69 | 24.67 | a | 31.67 | 40.45 | 43.63 | 51.06 | 49.97 | 42.07 | a | 31.90 | 15.73 | 6.55 | 30.56 | ||||||||||
1993 | 24.10 | 23.48 | a | 20.68 | 25.43 | 36.94 | 42.53 | 51.28 | b | 52.00 | 40.70 | 29.13 | 16.17 | 9.45 | 30.99 | |||||||||||
1994 | 6.48 | 12.26 | a | 23.38 | b | 29.70 | 37.16 | 48.03 | 53.65 | 55.13 | 43.97 | 31.00 | 21.00 | 16.21 | b | 31.50 | ||||||||||
1995 | 15.45 | 24.54 | 25.16 | 27.57 | 35.03 | 42.17 | a | 50.42 | 55.93 | b | 44.77 | 27.77 | 19.63 | 12.32 | 31.73 | |||||||||||
1996 | 13.19 | 20.03 | 18.13 | 26.73 | 39.84 | 49.07 | 55.03 | 53.06 | 41.67 | 31.97 | 21.23 | 14.45 | 32.03 | |||||||||||||
1997 | 10.97 | a | 21.75 | 21.29 | 27.30 | 39.55 | 46.37 | 51.13 | 52.48 | 48.60 | 27.71 | 20.63 | 10.26 | 31.50 | ||||||||||||
1998 | 18.74 | 21.82 | 23.00 | 24.73 | 34.61 | 40.93 | 55.10 | 53.00 | 46.53 | 34.48 | 23.37 | 12.10 | 32.37 | |||||||||||||
1999 | 13.35 | 13.21 | 23.29 | 25.13 | 35.97 | 42.67 | 55.29 | 52.10 | 41.00 | 26.77 | 16.27 | 6.90 | 29.33 | |||||||||||||
2000 | 13.35 | 20.34 | 22.68 | 30.90 | 36.39 | 48.73 | 52.97 | 51.61 | 43.73 | 34.87 | 17.38 | a | 11.37 | a | 32.03 | |||||||||||
2001 | 10.03 | 17.89 | 22.16 | 29.80 | 38.19 | 45.57 | 54.31 | b | 52.32 | 42.53 | 29.90 | 22.37 | 6.65 | 30.98 | ||||||||||||
2002 | 11.13 | 9.54 | 15.13 | 28.93 | 34.45 | 46.03 | 53.58 | 49.35 | 45.30 | 31.90 | 21.27 | 15.87 | 30.21 | |||||||||||||
2003 | 16.65 | 18.50 | 21.42 | 25.33 | 37.23 | 45.97 | 55.39 | 53.77 | 43.83 | 34.90 | a | 21.36 | b | 12.77 | a | 32.26 | ||||||||||
2004 | 16.21 | c | 12.15 | c | 25.80 | a | 31.08 | f | 35.90 | 44.45 | a | 51.00 | a | 50.55 | 41.66 | a | 32.91 | h | 22.33 | r | 11.58 | l | 34.72 | d | ||
2005 | 20.56 | d | 25.07 | 22.32 | 27.83 | 38.06 | 42.14 | b | 51.73 | a | 52.23 | 44.92 | e | 33.08 | f | 18.21 | a | 7.66 | b | 31.88 | a | |||||
2006 | 9.30 | a | 9.11 | 22.81 | 28.07 | a | 37.87 | a | 48.29 | b | 55.52 | 54.48 | b | 39.47 | 32.45 | b | 18.37 | 8.50 | a | 30.35 | ||||||
2007 | 5.97 | 17.32 | 23.97 | 30.77 | 39.93 | b | 46.27 | 54.19 | 54.03 | 44.03 | 29.35 | 19.20 | 15.14 | c | 31.68 | |||||||||||
2008 | 7.00 | c | 19.61 | f | 19.71 | 23.00 | 33.65 | 42.46 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.84 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.07 | 16.31 | 21.68 | 27.49 | 36.34 | 44.87 | 52.67 | 51.72 | 43.25 | 31.00 | 20.03 | 11.02 | 30.56 | |||||||||||||
S.D. | 5.76 | 4.75 | 3.07 | 2.56 | 2.46 | 2.52 | 1.67 | 2.21 | 2.71 | 2.97 | 3.07 | 4.28 | 1.44 | |||||||||||||
SKEW | 0.50 | -0.36 | -0.45 | 0.14 | 0.02 | 0.30 | 0.23 | -0.10 | 0.23 | 0.40 | -0.64 | -0.19 | -0.50 | |||||||||||||
MAX | 24.10 | 25.07 | 27.61 | 33.90 | 40.94 | 51.30 | 56.68 | 55.93 | 51.17 | 39.29 | 27.33 | 19.16 | 33.10 | |||||||||||||
MIN | -0.42 | 0.64 | 13.87 | 21.50 | 31.58 | 40.60 | 48.45 | 47.13 | 36.43 | 26.23 | 10.07 | 0.52 | 26.99 | |||||||||||||
YRS | 62 | 62 | 63 | 60 | 55 | 54 | 52 | 53 | 50 | 53 | 58 | 58 | 44 |