YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 61.60 | 63.70 | 73.16 | 75.92 | 58.28 | 49.52 | 39.32 | 25.03 | 55.82 | d | ||||||||
1972 | 26.60 | a | 33.48 | b | 45.78 | a | 48.13 | 61.87 | 66.34 | a | 70.24 | 73.65 | 58.63 | 50.37 | 40.58 | 26.22 | a | 50.16 | ||||||||
1973 | 27.24 | 35.89 | 46.08 | a | 53.12 | 60.23 | 65.62 | 73.97 | 71.47 | 62.03 | 49.85 | a | 35.23 | ----- | z | 52.79 | a | |||||||||
1974 | 27.37 | a | 38.70 | 42.89 | 51.23 | 55.71 | 68.25 | 71.08 | 72.84 | 64.03 | 50.68 | 40.57 | 34.35 | 51.47 | ||||||||||||
1975 | 29.55 | 31.27 | 39.48 | 48.50 | 58.55 | 64.70 | 75.85 | 67.77 | 63.12 | 49.66 | 37.38 | 33.03 | 49.91 | |||||||||||||
1976 | 30.66 | 35.11 | a | 40.50 | 49.93 | 57.40 | 61.90 | 70.87 | 67.84 | 65.67 | 50.03 | 38.47 | 32.07 | a | 50.04 | |||||||||||
1977 | 25.16 | 39.22 | c | 44.35 | a | 54.67 | 56.23 | 70.57 | 71.27 | 74.71 | 59.47 | 49.23 | 36.70 | 31.65 | 51.10 | |||||||||||
1978 | 31.55 | 36.07 | 44.61 | 49.52 | 56.45 | 66.73 | 71.84 | 68.42 | 58.82 | 48.82 | 32.22 | 24.81 | 49.15 | |||||||||||||
1979 | 15.79 | 29.29 | 42.68 | 50.37 | 60.37 | 66.62 | 73.08 | 71.47 | 63.23 | 52.69 | 33.27 | 34.65 | 49.46 | |||||||||||||
1980 | 19.16 | 33.70 | d | 41.82 | 52.45 | 58.77 | 62.33 | 71.18 | 66.63 | 61.10 | 49.02 | 37.88 | 31.82 | c | 48.82 | |||||||||||
1981 | 37.32 | 34.86 | 45.98 | 49.43 | 57.42 | 60.70 | 68.90 | 73.19 | 60.59 | b | 46.52 | 38.60 | 28.39 | 50.16 | ||||||||||||
1982 | 27.14 | b | 32.91 | a | 41.42 | 46.00 | 56.77 | 68.17 | 68.84 | b | 69.19 | 60.18 | 47.94 | 32.48 | a | 28.15 | 48.27 | |||||||||
1983 | 34.94 | 37.04 | a | 45.19 | 49.10 | 60.52 | 63.98 | 66.60 | 71.47 | 57.42 | 48.68 | a | 39.35 | 19.74 | 49.50 | |||||||||||
1984 | 31.02 | a | 36.38 | 45.25 | a | 47.73 | 53.45 | 63.08 | 71.63 | 70.68 | 57.52 | 45.74 | 35.65 | 18.65 | a | 48.06 | ||||||||||
1985 | 26.03 | 26.36 | 40.58 | 50.92 | 59.77 | 65.13 | 76.56 | 68.44 | 56.71 | a | 47.76 | 24.33 | 21.78 | a | 47.03 | |||||||||||
1986 | 30.05 | 33.29 | 45.16 | 49.22 | 59.26 | 69.28 | 67.77 | 74.45 | 57.90 | 51.32 | 39.31 | c | 30.37 | a | 50.62 | |||||||||||
1987 | 28.13 | a | 37.54 | 44.89 | 54.17 | 60.81 | 67.27 | 70.40 | 70.37 | 65.13 | 50.84 | b | 41.09 | a | 27.80 | c | 51.54 | |||||||||
1988 | 26.60 | b | 36.41 | a | 43.74 | 52.43 | 57.95 | 64.00 | 71.81 | 70.16 | 61.43 | 55.71 | e | 38.80 | 29.15 | 50.68 | ||||||||||
1989 | 30.92 | a | 26.70 | 39.57 | a | 53.15 | 58.08 | 67.83 | 70.77 | 69.81 | 62.77 | 49.03 | b | 40.77 | 33.13 | 50.21 | ||||||||||
1990 | 36.16 | c | 31.73 | d | 45.07 | a | 55.03 | 57.08 | 65.50 | 74.24 | 71.98 | 66.98 | 47.22 | a | 41.00 | c | 24.31 | d | 51.36 | |||||||
1991 | 24.62 | c | 40.79 | 41.07 | b | 51.22 | 57.13 | 62.52 | 72.58 | 72.45 | 65.30 | 50.18 | c | 37.86 | a | 35.09 | b | 50.90 | ||||||||
1992 | 34.16 | b | 40.02 | 48.37 | 52.52 | 62.34 | 71.98 | 71.76 | 72.02 | 60.53 | 51.00 | a | 39.05 | a | 24.40 | b | 52.34 | |||||||||
1993 | 22.95 | a | 29.68 | 40.62 | a | 49.27 | 63.52 | 64.68 | 67.89 | 69.40 | 63.18 | 53.07 | c | 33.76 | a | 32.17 | b | 49.18 | ||||||||
1994 | 35.21 | b | 33.98 | a | 46.19 | 54.93 | 60.89 | 65.07 | 76.24 | 71.85 | 66.03 | 50.12 | a | 34.79 | a | 30.62 | a | 52.16 | ||||||||
1995 | 29.73 | 38.67 | b | 42.84 | 49.83 | 62.52 | 66.36 | a | 72.92 | 66.50 | 65.63 | 48.74 | 39.40 | 31.80 | a | 51.25 | ||||||||||
1996 | 25.88 | e | 30.44 | b | 42.31 | b | 51.38 | 55.35 | 65.29 | a | 74.58 | a | 71.32 | 61.37 | 48.15 | 35.21 | b | 24.15 | e | 48.79 | ||||||
1997 | 26.06 | d | 33.18 | ----- | z | ----- | z | 60.72 | a | 64.88 | b | 71.10 | 74.40 | f | 62.68 | b | ----- | z | ----- | z | ----- | z | 53.10 | f | ||
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.46 | 34.33 | 43.46 | 50.97 | 58.92 | 65.65 | 71.75 | 70.92 | 61.69 | 49.69 | 37.04 | 28.53 | 50.09 | |||||||||||||
S.D. | 4.99 | 3.87 | 2.39 | 2.40 | 2.51 | 2.63 | 2.53 | 2.47 | 2.99 | 2.09 | 3.74 | 4.69 | 1.34 | |||||||||||||
SKEW | -0.38 | -0.34 | -0.04 | 0.07 | -0.12 | 0.42 | 0.04 | 0.00 | 0.04 | 0.74 | -1.59 | -0.49 | -0.33 | |||||||||||||
MAX | 37.32 | 40.79 | 48.37 | 55.03 | 63.52 | 71.98 | 76.56 | 75.92 | 66.98 | 55.71 | 41.09 | 35.09 | 52.34 | |||||||||||||
MIN | 15.79 | 26.36 | 39.48 | 46.00 | 53.45 | 60.70 | 66.60 | 66.50 | 56.71 | 45.74 | 24.33 | 18.65 | 47.03 | |||||||||||||
YRS | 26 | 26 | 25 | 25 | 27 | 27 | 27 | 26 | 27 | 26 | 26 | 25 | 24 |