YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | 57.87 | k | 66.73 | a | 76.50 | a | 78.67 | a | 77.48 | a | 69.43 | 55.95 | 48.87 | 40.87 | 64.31 | d | ||||
1959 | 39.58 | 37.46 | n | 46.80 | a | 56.02 | 66.29 | b | 73.10 | a | 74.30 | a | 76.31 | 71.37 | 57.55 | 44.45 | 41.71 | b | 58.86 | a | ||||||
1960 | 36.84 | 36.48 | b | 46.07 | c | 59.37 | d | 63.54 | f | 76.02 | a | 74.50 | a | 75.57 | b | 69.98 | 60.73 | 48.77 | b | 34.38 | b | 56.25 | a | |||
1961 | 35.13 | a | 43.12 | 48.04 | d | 57.23 | 66.98 | a | 73.13 | 73.47 | a | 73.59 | d | 68.05 | 58.97 | 43.67 | a | 40.37 | 56.81 | |||||||
1962 | 35.19 | 46.27 | b | 45.27 | a | 58.25 | 69.90 | a | 73.10 | 74.32 | i | 77.15 | a | 69.87 | 60.37 | 49.32 | 41.89 | 56.96 | a | |||||||
1963 | 33.63 | 43.86 | 51.19 | 61.33 | 68.69 | 73.75 | 78.55 | 76.76 | 71.05 | 63.97 | 48.37 | c | 37.10 | 59.02 | ||||||||||||
1964 | 37.63 | 35.74 | 47.28 | a | 57.05 | a | 68.29 | 74.18 | 79.69 | 77.87 | d | 69.75 | 61.04 | f | 48.33 | a | 41.55 | 57.94 | a | |||||||
1965 | 43.31 | 41.45 | 43.34 | 60.71 | d | 66.14 | f | 74.33 | 77.92 | 74.44 | 69.41 | c | 59.75 | a | 52.59 | b | 44.29 | b | 58.32 | a | ||||||
1966 | 34.08 | 38.23 | 50.84 | c | 57.92 | 66.74 | b | 73.62 | 80.24 | 72.87 | 68.70 | b | 57.08 | 52.02 | 37.73 | a | 57.51 | |||||||||
1967 | 40.76 | 42.80 | 55.19 | 62.28 | 64.60 | 72.68 | 75.19 | 72.58 | 66.65 | 59.81 | 48.43 | b | 36.32 | 58.11 | ||||||||||||
1968 | 39.92 | 41.79 | 47.82 | a | 54.13 | 65.10 | 73.40 | 73.03 | a | 73.31 | 65.52 | d | 60.58 | 46.09 | a | 41.05 | 56.81 | |||||||||
1969 | 46.23 | 43.04 | 41.16 | 59.73 | 66.44 | 72.10 | 79.31 | 77.82 | a | 68.88 | 56.31 | 47.32 | 42.52 | a | 58.40 | |||||||||||
1970 | 37.00 | 45.70 | 46.05 | 56.28 | 65.39 | 73.86 | e | 76.73 | 75.77 | 70.14 | b | 54.82 | 48.72 | 45.03 | 57.96 | |||||||||||
1971 | 41.31 | 42.32 | 50.26 | 56.97 | 65.27 | 75.33 | 76.47 | 70.40 | b | 66.89 | b | 58.60 | 49.58 | 42.60 | 58.00 | |||||||||||
1972 | 41.03 | 45.41 | 54.97 | 61.30 | 65.45 | 74.08 | 73.92 | 72.31 | 67.90 | 57.41 | c | 41.60 | 38.94 | 57.86 | ||||||||||||
1973 | 35.02 | 39.25 | 47.84 | 51.88 | 63.50 | b | 71.29 | a | 74.15 | 73.37 | 67.93 | 60.81 | b | 50.72 | 41.69 | 56.45 | ||||||||||
1974 | 41.11 | 43.57 | a | 56.73 | 59.10 | 70.94 | 75.57 | 77.61 | 72.34 | 62.75 | 58.27 | 46.98 | 39.11 | 58.67 | ||||||||||||
1975 | 41.18 | 42.36 | 49.74 | 56.23 | 64.03 | a | 74.79 | a | 73.27 | 74.85 | 65.77 | 60.32 | 48.63 | 43.11 | 57.86 | |||||||||||
1976 | 40.85 | 51.31 | 51.60 | 59.77 | 64.77 | a | 74.88 | 72.31 | 74.27 | 68.60 | a | 53.56 | 43.87 | 39.71 | 57.96 | |||||||||||
1977 | 36.50 | 45.46 | 49.24 | 58.15 | 68.03 | 76.63 | 78.69 | 79.00 | 75.60 | 61.69 | 51.66 | a | 46.47 | 60.59 | ||||||||||||
1978 | 36.89 | 39.32 | 51.97 | 62.95 | 68.03 | 75.07 | 79.53 | 75.91 | c | 69.20 | 61.12 | a | 49.92 | 39.92 | 59.15 | |||||||||||
1979 | 35.50 | 42.88 | 50.45 | 58.93 | 66.18 | 72.63 | 77.34 | 72.71 | 69.39 | c | 62.66 | 44.42 | 41.65 | 57.89 | ||||||||||||
1980 | 41.37 | 45.52 | 50.31 | 56.78 | 66.15 | 81.27 | 81.85 | 77.68 | 72.00 | b | 58.52 | 45.95 | 47.05 | 60.37 | ||||||||||||
1981 | 42.15 | 46.54 | 50.84 | 62.05 | 66.36 | f | 78.02 | 78.97 | 73.48 | 68.86 | a | 59.94 | 53.35 | 45.73 | 59.99 | a | ||||||||||
1982 | 41.17 | b | 42.12 | 52.00 | 58.04 | c | 65.97 | 73.04 | f | 76.72 | a | 77.58 | 71.35 | 58.45 | 46.48 | a | 37.44 | 57.03 | a | |||||||
1983 | 38.87 | 44.50 | 50.47 | 54.96 | c | 64.02 | a | 72.88 | 77.57 | c | 78.48 | 73.32 | 61.92 | 51.77 | 34.53 | b | 58.61 | |||||||||
1984 | 39.05 | 45.38 | 50.16 | 57.21 | k | 69.23 | i | 72.58 | e | 75.56 | 73.60 | g | 67.56 | d | 55.76 | f | 47.12 | d | 42.30 | k | 56.77 | e | ||||
1985 | 34.58 | k | 34.62 | p | 48.72 | h | 59.26 | g | 66.73 | 73.33 | i | 76.37 | a | 77.29 | 67.08 | 57.84 | b | 47.93 | 36.60 | 61.41 | e | |||||
1986 | 41.92 | 44.83 | e | 51.95 | 60.48 | 66.03 | a | 72.47 | j | 75.79 | e | 74.71 | b | 69.32 | 57.82 | a | 43.66 | a | 36.77 | 56.66 | a | |||||
1987 | 35.58 | a | 41.35 | a | 44.90 | b | 54.00 | 64.39 | 71.85 | 76.34 | 75.21 | b | 66.12 | 59.12 | a | 45.90 | 36.24 | 55.92 | ||||||||
1988 | 34.58 | 41.31 | 45.54 | g | 53.76 | g | 63.89 | l | 73.63 | o | 73.93 | c | 75.07 | b | 67.09 | a | 60.03 | a | 48.16 | b | 37.35 | 54.69 | d | |||
1989 | 40.45 | c | 39.83 | b | 53.33 | b | 59.83 | 70.34 | 72.76 | e | 77.86 | f | 75.15 | g | 61.29 | r | 59.19 | 48.52 | a | 30.17 | g | 55.53 | d | |||
1990 | 39.43 | a | 42.07 | 48.48 | a | 57.04 | b | 64.98 | a | 80.69 | f | 74.65 | 74.40 | a | 69.77 | 57.85 | a | 49.18 | 36.30 | a | 55.83 | a | ||||
1991 | 35.65 | a | 45.26 | a | 50.74 | b | 58.50 | a | 69.34 | f | 75.48 | 75.47 | l | 73.36 | b | 63.91 | a | 56.97 | 41.86 | b | 39.15 | 54.09 | b | |||
1992 | 36.05 | 44.77 | a | 51.16 | 58.45 | a | 62.79 | 71.97 | 76.30 | f | 73.44 | 68.60 | a | 60.00 | 40.78 | 39.00 | 55.18 | a | ||||||||
1993 | 38.63 | 39.44 | a | 48.07 | a | 57.61 | b | 65.95 | a | 75.20 | 78.69 | 73.88 | g | 67.94 | d | 54.50 | b | 42.55 | a | 39.76 | 55.30 | a | ||||
1994 | 36.60 | a | 40.26 | a | 49.00 | a | 56.59 | a | 66.27 | g | ----- | z | 83.18 | i | 76.79 | b | 70.78 | ----- | z | 49.09 | c | 44.20 | a | 52.91 | d | |
1995 | 40.37 | 47.94 | a | 50.83 | b | 57.00 | a | 66.62 | b | 73.55 | b | 78.65 | 77.02 | 68.73 | b | 59.90 | 50.37 | 41.26 | 59.35 | |||||||
1996 | 40.40 | a | 46.41 | 46.30 | a | 58.88 | a | 73.80 | a | 76.17 | a | 77.26 | 74.53 | a | 64.91 | g | 57.67 | a | 47.06 | d | 41.79 | 58.21 | a | |||
1997 | 36.96 | d | 38.46 | a | 50.66 | b | 51.31 | a | ----- | z | 73.45 | a | 77.32 | a | 76.07 | a | 72.41 | b | 57.43 | a | 44.42 | 34.73 | c | 55.75 | a | |
1998 | 41.61 | 41.68 | 45.28 | a | 53.17 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.44 | h | |||
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | 60.88 | j | 70.71 | j | 74.10 | t | 78.24 | n | 77.25 | q | 68.45 | t | 57.68 | l | 43.32 | s | 36.55 | u | ----- | z |
2001 | 37.17 | p | 44.11 | s | 46.25 | s | 59.86 | w | 68.56 | w | ----- | 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 |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.71 | 42.84 | 49.38 | 57.85 | 66.53 | 74.27 | 76.70 | 75.18 | 68.89 | 58.85 | 47.46 | 40.16 | 58.17 | |||||||||||||
S.D. | 2.94 | 3.22 | 3.25 | 2.75 | 2.33 | 1.99 | 2.35 | 2.08 | 2.47 | 2.24 | 3.12 | 3.34 | 1.19 | |||||||||||||
SKEW | 0.16 | 0.02 | -0.18 | -0.40 | 1.14 | 1.36 | -0.01 | -0.10 | 0.07 | -0.19 | -0.30 | 0.15 | 0.22 | |||||||||||||
MAX | 46.23 | 51.31 | 56.73 | 62.95 | 73.80 | 81.27 | 81.85 | 79.00 | 75.60 | 63.97 | 53.35 | 47.05 | 60.59 | |||||||||||||
MIN | 33.63 | 35.74 | 41.16 | 51.31 | 62.79 | 71.29 | 72.31 | 70.40 | 62.75 | 53.56 | 40.78 | 34.38 | 55.92 | |||||||||||||
YRS | 39 | 38 | 38 | 37 | 32 | 34 | 35 | 37 | 38 | 37 | 40 | 38 | 20 |