YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.58 | d | 20.71 | 23.14 | j | |
1934 | 17.18 | c | 23.24 | c | 28.28 | b | 35.07 | b | 43.94 | 43.20 | 57.26 | 52.87 | 45.90 | 33.74 | d | 24.55 | a | 20.29 | 35.46 | |||||||
1935 | 19.39 | 22.00 | 27.13 | a | 32.57 | b | 35.33 | a | 47.40 | 52.68 | 54.26 | l | 40.46 | q | 34.41 | d | 24.00 | 19.26 | 31.42 | b | ||||||
1936 | 18.00 | b | 22.30 | b | 26.13 | 33.17 | 40.52 | b | 49.47 | 54.29 | 52.23 | 45.03 | 36.04 | c | 23.57 | 18.94 | 34.97 | |||||||||
1937 | ----- | z | ----- | z | ----- | z | 26.70 | 33.81 | 43.60 | 52.39 | 50.87 | 46.27 | 32.23 | 20.00 | ----- | z | 38.23 | d | ||||||||
1938 | 14.61 | 21.15 | b | ----- | z | ----- | z | 33.94 | n | 42.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.07 | i | ||
1939 | 14.55 | 7.22 | a | 24.35 | 32.40 | 36.06 | 43.13 | 56.13 | 50.71 | ----- | z | ----- | z | ----- | z | ----- | z | 33.07 | d | |||||||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.81 | d | 35.84 | 22.57 | 26.39 | 32.65 | h | |||
1941 | 24.71 | 26.11 | 22.84 | 28.43 | 39.35 | 42.38 | a | 42.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.35 | e | ||||||
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 | ----- | 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 | 34.86 | c | 42.00 | 51.53 | a | 50.55 | b | 44.73 | 32.45 | 21.47 | 12.45 | 36.26 | d | |||||
1965 | 19.42 | 14.39 | 10.50 | a | 19.10 | 33.73 | a | 40.71 | b | 52.81 | 47.63 | d | 41.83 | a | 29.92 | e | 23.22 | c | 11.33 | d | 28.72 | |||||
1966 | 1.89 | d | 1.62 | d | 20.93 | b | 29.96 | d | 44.00 | d | 42.48 | c | 56.04 | c | 52.81 | 44.43 | i | ----- | z | ----- | z | 17.58 | g | 31.22 | d | |
1967 | 8.67 | d | 17.24 | c | 26.85 | e | 27.82 | b | 34.67 | d | 52.62 | d | 58.03 | a | 51.50 | c | 44.25 | b | 32.64 | f | 22.46 | b | 8.17 | a | 32.02 | a |
1968 | 7.56 | d | 20.70 | b | 27.11 | d | 32.42 | d | 36.15 | e | 39.43 | p | 54.10 | b | 47.22 | d | 41.36 | b | 36.24 | j | ----- | z | ----- | z | 33.33 | d |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | 41.70 | u | 42.00 | 53.74 | 53.96 | c | 44.90 | 31.55 | b | 21.23 | 21.00 | 38.34 | e | |||||
1970 | 12.74 | 20.82 | 20.97 | 20.60 | 32.81 | 42.07 | 52.61 | 52.55 | 40.40 | 26.55 | 17.80 | 13.55 | 29.46 | |||||||||||||
1971 | 8.03 | 16.18 | 20.35 | 24.10 | 29.03 | 43.13 | 53.39 | 50.77 | 41.33 | 31.58 | 21.63 | 16.06 | 29.63 | |||||||||||||
1972 | 15.42 | 17.48 | 22.94 | 23.57 | 30.90 | 43.73 | 52.35 | 49.37 | d | 43.87 | 37.32 | 19.55 | h | 12.54 | c | 31.77 | a | |||||||||
1973 | 8.58 | 16.18 | 23.48 | d | 26.72 | e | 35.11 | d | 42.04 | c | 50.25 | g | 48.03 | 39.37 | 28.19 | 21.33 | 15.29 | 27.67 | a | |||||||
1974 | 15.87 | 11.89 | 23.93 | b | 23.41 | c | 32.32 | 46.47 | 49.52 | 47.48 | 41.93 | 36.23 | 20.27 | 8.65 | 29.83 | |||||||||||
1975 | 12.39 | 15.68 | 22.29 | 22.87 | 31.68 | 39.24 | a | 52.10 | 47.65 | 43.43 | 29.35 | 14.97 | 12.67 | a | 28.69 | |||||||||||
1976 | 12.32 | 21.52 | 18.13 | 26.83 | 36.03 | 41.53 | 51.19 | 47.26 | 42.60 | 28.26 | 17.17 | 11.74 | 29.55 | |||||||||||||
1977 | 11.31 | b | 17.54 | 17.90 | 27.40 | 32.10 | 44.10 | 52.71 | 51.68 | 44.03 | 33.81 | 22.30 | 19.77 | 31.22 | ||||||||||||
1978 | 19.77 | 19.46 | 27.74 | 28.83 | 34.74 | 43.93 | 50.65 | 46.71 | 41.17 | 33.52 | 26.43 | 13.90 | b | 32.24 | ||||||||||||
1979 | 12.16 | 15.71 | 23.58 | 27.80 | 35.19 | 43.67 | 48.81 | 46.65 | 43.76 | a | 31.00 | 19.13 | 12.97 | 30.04 | ||||||||||||
1980 | 22.39 | 20.83 | 20.71 | 25.80 | 29.61 | 40.27 | 51.58 | 50.45 | 41.87 | 26.97 | 17.93 | a | 19.90 | 30.69 | ||||||||||||
1981 | 18.94 | 17.29 | 22.29 | 29.45 | a | 37.23 | 47.50 | 52.29 | 50.06 | 43.97 | 31.90 | 21.33 | 17.13 | 32.45 | ||||||||||||
1982 | 14.40 | a | 20.57 | 24.55 | 27.40 | 33.13 | 38.69 | a | 49.39 | 52.06 | 44.57 | 25.61 | 23.60 | 17.48 | 30.95 | |||||||||||
1983 | 16.74 | 21.39 | 26.06 | 24.10 | 34.10 | 40.41 | a | 51.16 | 51.10 | 47.47 | 35.74 | 23.97 | 22.94 | 32.93 | ||||||||||||
1984 | 15.68 | 12.83 | 20.35 | 25.93 | 38.90 | a | 44.07 | 51.26 | 50.48 | 44.97 | 31.65 | 21.83 | 21.10 | 31.59 | ||||||||||||
1985 | 16.26 | 13.36 | 25.35 | 28.90 | 35.71 | 43.83 | 51.84 | 49.10 | 40.13 | 31.97 | 22.57 | 14.81 | 31.15 | |||||||||||||
1986 | 22.06 | 21.14 | 25.13 | 29.90 | 34.71 | 44.87 | 50.52 | 52.23 | 38.90 | 30.45 | 24.73 | 19.42 | 32.84 | |||||||||||||
1987 | 13.94 | 19.50 | 20.35 | 29.17 | 35.10 | 44.43 | 46.81 | 49.61 | 40.47 | 34.29 | 21.57 | 14.61 | 30.82 | |||||||||||||
1988 | 12.39 | 21.90 | 19.29 | 28.40 | 35.06 | 45.83 | 52.87 | 52.74 | 40.07 | 35.42 | 22.27 | 14.35 | 31.72 | |||||||||||||
1989 | 12.81 | 22.18 | 24.23 | 31.80 | 36.84 | 42.63 | 52.39 | 49.61 | 42.60 | 32.16 | 19.50 | 11.84 | 31.55 | |||||||||||||
1990 | 11.71 | 16.00 | 25.87 | 31.03 | 35.10 | 45.00 | 52.13 | 48.23 | 45.47 | 30.26 | 20.63 | 8.03 | 30.79 | |||||||||||||
1991 | 17.97 | 20.79 | 21.71 | 24.40 | 31.35 | 40.10 | 51.26 | 50.94 | 43.17 | 30.71 | 23.60 | 19.84 | 31.32 | |||||||||||||
1992 | 11.52 | 23.17 | 25.58 | 31.50 | 40.71 | 43.13 | 49.84 | 48.55 | 42.70 | 33.35 | 16.30 | 14.58 | 31.74 | |||||||||||||
1993 | 23.55 | 23.07 | 22.61 | 28.93 | 36.68 | 42.13 | 48.17 | a | 51.55 | 39.63 | 31.19 | 19.27 | 13.13 | 31.66 | ||||||||||||
1994 | 10.87 | 17.81 | a | 24.71 | 28.60 | 33.97 | 45.73 | 51.16 | 53.94 | 44.00 | 30.81 | 22.50 | 19.84 | 31.99 | ||||||||||||
1995 | 17.61 | 24.39 | 25.06 | 25.73 | 33.77 | 40.90 | 49.13 | 54.68 | 44.43 | 28.10 | 24.60 | 16.87 | 32.11 | |||||||||||||
1996 | 15.83 | a | 24.03 | 21.97 | a | 30.47 | 37.81 | 45.63 | 54.17 | a | 51.45 | 43.23 | 34.35 | 24.60 | 17.81 | 33.45 | ||||||||||
1997 | 17.74 | 20.57 | 22.90 | 29.30 | 38.65 | 43.53 | 49.94 | 51.81 | 48.87 | 30.33 | a | 22.63 | 12.52 | 32.40 | ||||||||||||
1998 | 19.97 | 19.57 | 23.74 | 25.60 | 34.55 | 42.27 | 54.13 | 52.13 | 48.10 | 35.10 | 24.13 | 17.61 | 33.07 | |||||||||||||
1999 | 15.87 | 18.57 | 25.45 | 30.80 | 35.90 | 44.13 | 54.84 | 51.74 | 44.23 | 29.10 | 21.33 | 13.03 | 32.08 | |||||||||||||
2000 | 16.58 | 22.31 | 24.03 | 30.00 | 37.03 | 46.17 | 51.58 | 50.61 | 43.90 | 35.00 | 18.43 | 15.61 | 32.61 | |||||||||||||
2001 | 15.32 | 19.82 | 23.42 | 28.30 | 37.39 | 42.13 | 52.43 | a | 51.84 | 43.23 | 33.52 | 24.07 | 13.52 | 32.08 | ||||||||||||
2002 | 15.65 | 16.18 | 16.03 | 30.53 | 32.58 | 43.33 | 51.87 | 49.35 | 45.27 | 32.52 | 22.87 | 15.97 | b | 31.01 | ||||||||||||
2003 | 21.42 | 21.07 | 21.77 | 24.43 | 36.65 | 43.34 | a | 52.52 | 52.84 | 42.90 | 35.10 | 21.43 | 16.26 | 32.48 | ||||||||||||
2004 | 16.26 | 16.52 | 26.90 | 27.97 | 33.48 | 40.66 | a | 47.56 | f | 49.45 | 44.13 | 33.68 | 26.40 | 17.87 | 30.30 | a | ||||||||||
2005 | 25.03 | 27.07 | 26.48 | 30.43 | 38.39 | 44.27 | 51.65 | 51.70 | a | 47.70 | 35.97 | 23.43 | 16.35 | 34.87 | ||||||||||||
2006 | 16.13 | 16.50 | 22.58 | 31.17 | 39.00 | 49.63 | 55.81 | 53.16 | 41.47 | 34.29 | 22.97 | 4.81 | 32.29 | |||||||||||||
2007 | 6.58 | 18.82 | 23.29 | 29.20 | 38.23 | 44.70 | 51.90 | 53.77 | 46.93 | ----- | z | ----- | z | ----- | z | 34.83 | c | |||||||||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.30 | d | 51.54 | c | 42.38 | v | ----- | z | ----- | z | ----- | z | 52.42 | j |
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 | 15.33 | 18.87 | 23.15 | 28.10 | 35.59 | 43.61 | 52.06 | 50.72 | 43.54 | 32.26 | 21.92 | 15.71 | 31.69 | |||||||||||||
S.D. | 4.80 | 4.56 | 3.30 | 3.30 | 3.14 | 2.65 | 2.61 | 2.06 | 2.37 | 2.84 | 2.57 | 4.24 | 1.57 | |||||||||||||
SKEW | -0.26 | -1.35 | -1.34 | -0.50 | 0.50 | 1.01 | -0.66 | -0.32 | 0.09 | -0.40 | -0.66 | -0.12 | 0.28 | |||||||||||||
MAX | 25.03 | 27.07 | 28.28 | 35.07 | 44.00 | 52.62 | 58.03 | 54.68 | 48.87 | 37.32 | 26.43 | 26.39 | 35.46 | |||||||||||||
MIN | 1.89 | 1.63 | 10.50 | 19.10 | 29.03 | 38.69 | 42.65 | 46.65 | 38.90 | 25.61 | 14.97 | 4.81 | 28.69 | |||||||||||||
YRS | 48 | 48 | 47 | 48 | 49 | 50 | 49 | 49 | 47 | 45 | 46 | 46 | 37 |