YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | 40.94 | m | 43.20 | 46.26 | 54.38 | 61.90 | 70.40 | 73.39 | 72.81 | 66.53 | 62.61 | 49.28 | 42.17 | a | 58.45 | a | ||||||||||
1988 | 40.50 | 46.24 | 50.45 | 58.09 | c | 64.62 | c | 72.72 | 72.75 | c | 72.67 | a | 67.93 | 61.22 | a | 53.47 | 41.00 | 58.47 | ||||||||
1989 | 44.19 | 47.39 | f | 55.08 | 63.12 | a | 71.21 | b | 73.78 | 75.56 | 72.53 | 66.30 | 61.44 | 52.28 | 39.50 | b | 61.36 | a | ||||||||
1990 | 44.57 | a | 46.93 | 50.18 | 58.10 | 66.42 | 80.21 | b | 70.33 | b | 69.19 | 66.05 | 59.02 | a | ----- | z | 44.50 | b | 59.59 | a | ||||||
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.00 | a | 70.14 | f | 70.00 | 63.15 | d | 61.62 | a | 45.14 | b | 43.08 | a | 59.33 | f | |
1992 | 36.91 | c | 44.81 | 51.59 | c | 59.20 | b | 62.19 | 71.53 | a | 75.02 | b | 71.77 | a | 69.21 | b | 61.78 | f | 44.62 | d | 45.76 | j | 58.68 | b | ||
1993 | 43.96 | f | 43.68 | f | 50.79 | b | 58.80 | e | 66.65 | e | 75.50 | 75.53 | 75.45 | c | 68.32 | b | 61.22 | f | 48.52 | d | 45.76 | b | 62.81 | c | ||
1994 | 44.93 | a | 47.87 | b | 52.94 | 60.67 | a | 66.14 | f | 80.96 | c | 78.90 | 76.98 | 69.64 | b | 62.59 | b | 51.73 | d | 48.12 | b | 61.39 | a | |||
1995 | 43.00 | c | 51.09 | a | 52.22 | a | 58.87 | c | 66.39 | 71.86 | a | 77.00 | b | 75.05 | a | 67.98 | 64.38 | b | 54.72 | a | 45.08 | a | 60.64 | |||
1996 | 45.02 | a | 48.23 | a | 47.93 | c | 57.64 | b | 75.65 | a | 75.27 | 74.52 | a | 71.39 | 65.40 | 59.67 | b | 51.55 | b | 45.57 | a | 59.82 | ||||
1997 | 37.79 | c | 41.32 | 52.17 | a | 52.10 | 65.03 | a | 71.76 | a | 75.06 | 73.55 | c | 70.17 | 57.77 | 46.83 | a | 37.17 | a | 56.73 | ||||||
1998 | 45.12 | a | 42.26 | a | 47.18 | a | 54.47 | 70.23 | a | 77.82 | b | 76.27 | 71.02 | d | 70.32 | b | 60.08 | e | 51.98 | 40.78 | a | 58.96 | ||||
1999 | 44.80 | c | 49.36 | 49.90 | a | 56.09 | a | 63.98 | a | 70.24 | a | 71.71 | 73.32 | a | 65.61 | c | 57.93 | a | 52.93 | a | 39.76 | b | 57.97 | |||
2000 | 45.68 | 48.62 | 51.23 | 59.71 | a | 69.96 | c | 70.54 | d | 75.35 | 73.05 | 70.26 | g | 55.45 | a | 41.95 | 38.79 | c | 57.30 | a | ||||||
2001 | 36.00 | c | 45.22 | e | 44.62 | a | 59.15 | g | 69.15 | a | 75.59 | a | 77.67 | a | 75.28 | a | 69.50 | a | 62.62 | a | 51.23 | 43.84 | c | 59.16 | a | |
2002 | 46.70 | a | 39.81 | b | 48.48 | a | 62.92 | d | 68.93 | a | 78.12 | a | 75.05 | a | 77.11 | 70.09 | b | 59.05 | a | 48.45 | b | 41.86 | f | 61.34 | a | |
2003 | 46.48 | b | 47.52 | f | 51.43 | d | 58.66 | e | 69.36 | f | 73.56 | d | 76.84 | 76.50 | 68.88 | d | 62.53 | 52.98 | b | 45.69 | g | 63.10 | c | |||
2004 | 44.52 | 41.30 | a | 52.90 | 54.81 | a | 68.55 | b | 73.69 | c | 74.90 | a | 70.82 | a | 66.63 | 59.83 | b | 46.32 | 42.27 | 58.04 | ||||||
2005 | 46.17 | a | 42.48 | 48.97 | 57.55 | 66.06 | 75.92 | 77.08 | a | 72.10 | a | 71.87 | 59.40 | a | 53.62 | a | 45.58 | 59.73 | ||||||||
2006 | 47.40 | a | 47.38 | 52.42 | 63.08 | 72.00 | 76.38 | b | 75.50 | 71.44 | 65.05 | 60.60 | 54.07 | 42.50 | 60.65 | |||||||||||
2007 | 37.67 | b | 46.33 | a | 55.23 | a | 57.71 | b | 63.06 | 69.98 | e | 72.43 | a | 71.72 | h | 70.33 | c | 62.52 | b | 51.04 | c | 44.15 | g | 58.63 | b | |
2008 | 42.02 | e | 48.00 | b | 52.22 | b | 58.18 | 67.67 | g | 78.62 | f | 71.31 | j | 72.11 | d | 65.75 | d | 61.90 | k | 53.03 | l | 46.94 | g | 56.38 | f | |
2009 | 47.81 | e | 50.69 | j | 56.23 | p | 61.25 | f | 73.40 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.81 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.36 | 45.58 | 50.68 | 58.21 | 67.33 | 74.23 | 75.04 | 73.05 | 67.84 | 60.54 | 50.14 | 42.67 | 59.00 | |||||||||||||
S.D. | 3.65 | 3.21 | 2.71 | 2.93 | 3.68 | 3.22 | 2.10 | 2.25 | 2.26 | 2.18 | 3.59 | 2.93 | 1.32 | |||||||||||||
SKEW | -0.86 | -0.23 | -0.43 | -0.06 | 0.41 | 0.53 | -0.45 | 0.37 | -0.18 | -0.44 | -0.74 | -0.08 | -0.23 | |||||||||||||
MAX | 47.81 | 51.09 | 55.23 | 63.12 | 75.65 | 80.96 | 78.90 | 77.11 | 71.87 | 64.38 | 54.72 | 48.12 | 60.65 | |||||||||||||
MIN | 36.00 | 39.81 | 44.62 | 52.10 | 61.90 | 69.98 | 70.33 | 69.19 | 63.15 | 55.45 | 41.95 | 37.17 | 56.73 | |||||||||||||
YRS | 20 | 18 | 21 | 20 | 18 | 21 | 20 | 21 | 21 | 19 | 20 | 17 | 9 |