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 | 48.42 | 51.17 | 56.26 | 59.19 | 43.33 | 36.74 | 31.23 | 17.39 | 42.97 | d | ||||||||
1972 | 17.30 | a | 23.71 | a | 33.97 | a | 35.90 | 47.65 | 53.70 | 53.90 | 57.55 | 44.47 | 34.77 | 34.47 | 18.17 | a | 37.96 | |||||||||
1973 | 20.13 | 27.25 | 33.17 | a | 39.03 | 45.58 | 52.43 | 57.03 | 55.71 | 46.67 | 37.87 | a | 28.23 | ----- | z | 40.28 | a | |||||||||
1974 | 18.40 | a | 28.93 | 31.74 | 39.43 | 42.81 | 52.50 | 56.39 | 56.81 | 46.60 | 35.35 | 33.67 | 27.90 | 39.21 | ||||||||||||
1975 | 21.19 | 22.39 | 28.16 | 36.03 | 44.87 | 52.13 | 61.45 | 54.77 | 44.73 | 38.94 | 27.93 | 25.13 | 38.15 | |||||||||||||
1976 | 23.19 | 25.36 | a | 28.48 | 37.20 | 42.90 | 48.23 | 56.26 | 54.06 | 48.87 | 35.97 | 27.30 | 25.80 | a | 37.80 | |||||||||||
1977 | 19.13 | 28.36 | c | 32.43 | a | 38.67 | 43.68 | 56.07 | 56.81 | 58.03 | 46.43 | 34.71 | 28.13 | 25.39 | 38.99 | |||||||||||
1978 | 25.68 | 28.14 | 32.26 | 38.47 | 43.00 | 51.40 | 56.58 | 53.97 | 46.20 | 32.32 | 23.70 | 14.87 | 37.22 | |||||||||||||
1979 | 7.00 | 20.61 | 29.29 | 36.33 | 45.26 | 51.53 | 56.84 | 56.35 | 46.03 | 38.68 | 26.23 | 28.26 | 36.87 | |||||||||||||
1980 | 9.39 | 27.58 | c | 31.00 | 38.43 | 46.19 | 49.87 | 55.10 | 51.39 | 46.27 | 33.61 | 30.53 | 26.47 | a | 37.15 | |||||||||||
1981 | 33.16 | 26.29 | 33.16 | 35.50 | 45.16 | 47.57 | 53.48 | 55.10 | 44.46 | b | 32.58 | 29.23 | 20.71 | 38.03 | ||||||||||||
1982 | 18.03 | 23.63 | a | 28.65 | 31.70 | 42.52 | 53.50 | 53.90 | b | 53.26 | 45.30 | 35.42 | 24.28 | a | 21.35 | 35.96 | ||||||||||
1983 | 27.77 | 29.56 | a | 34.71 | 35.07 | 44.61 | 51.17 | 51.74 | 56.06 | 41.43 | 33.77 | a | 32.47 | 12.90 | 37.61 | |||||||||||
1984 | 23.57 | a | 29.79 | 33.74 | 35.57 | 40.19 | 50.27 | 54.29 | 54.42 | 42.20 | 32.16 | 28.17 | 10.40 | a | 36.23 | |||||||||||
1985 | 21.00 | 15.04 | 27.52 | 36.00 | 45.06 | 50.00 | 58.48 | 52.52 | 42.59 | a | 35.48 | 14.90 | 16.47 | a | 34.59 | |||||||||||
1986 | 23.16 | 24.00 | 33.45 | 35.77 | 45.03 | 54.57 | 53.81 | 56.71 | 45.33 | 35.39 | 30.14 | a | 25.43 | a | 38.57 | |||||||||||
1987 | 22.10 | a | 28.39 | 33.90 | 39.57 | 45.84 | 50.73 | 56.74 | 53.10 | 46.60 | 32.69 | b | 30.40 | 20.89 | c | 38.41 | ||||||||||
1988 | 18.76 | b | 24.75 | a | 30.68 | 38.73 | 43.71 | 51.13 | 56.16 | 53.06 | 43.97 | 38.59 | d | 30.27 | 21.97 | 37.65 | ||||||||||
1989 | 21.43 | a | 17.46 | 28.42 | 38.93 | 43.90 | 53.67 | 54.77 | 55.16 | 44.03 | 34.52 | b | 31.40 | 28.29 | 37.67 | |||||||||||
1990 | 28.48 | b | 20.88 | c | 31.42 | 41.40 | 44.52 | 52.23 | 57.45 | 56.65 | 47.57 | 34.90 | 30.50 | b | 14.83 | b | 38.40 | |||||||||
1991 | 16.38 | b | 30.21 | 29.60 | a | 37.47 | 44.45 | 49.70 | 56.65 | 56.55 | 47.07 | 33.73 | a | 30.24 | a | 27.83 | a | 38.32 | ||||||||
1992 | 28.66 | b | 32.83 | 34.10 | 39.50 | 45.58 | 57.70 | 57.26 | 54.68 | 45.50 | 37.20 | a | 31.63 | 16.74 | 40.11 | |||||||||||
1993 | 14.74 | 20.89 | 29.13 | 37.67 | 48.03 | 52.37 | 55.29 | 53.74 | 45.10 | 37.71 | c | 22.33 | 27.67 | a | 37.06 | |||||||||||
1994 | 27.94 | 26.50 | 31.39 | 42.57 | 47.03 | 50.83 | 60.16 | 56.45 | 48.67 | 36.53 | a | 26.52 | a | 24.29 | 39.91 | |||||||||||
1995 | 23.77 | 27.82 | 31.29 | 37.23 | 48.65 | 53.27 | 59.16 | 51.45 | 48.93 | 36.29 | 31.07 | 26.90 | 39.65 | |||||||||||||
1996 | 19.07 | a | 20.93 | b | 30.90 | a | 38.70 | 43.19 | 50.90 | a | 57.19 | 54.90 | 46.53 | 35.84 | 26.72 | a | 17.00 | d | 36.82 | |||||||
1997 | 18.30 | a | 23.64 | ----- | z | ----- | z | 46.19 | 52.11 | b | 56.06 | 58.76 | f | 47.76 | a | ----- | z | ----- | z | ----- | z | 40.68 | 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 | 21.07 | 25.19 | 31.30 | 37.63 | 44.96 | 51.88 | 56.27 | 55.06 | 45.65 | 35.45 | 28.53 | 21.72 | 37.85 | |||||||||||||
S.D. | 5.81 | 4.21 | 2.17 | 2.25 | 1.97 | 2.17 | 2.10 | 1.96 | 1.96 | 1.98 | 4.05 | 5.46 | 1.28 | |||||||||||||
SKEW | -0.31 | -0.51 | -0.15 | -0.24 | -0.04 | 0.56 | 0.29 | -0.03 | -0.27 | 0.07 | -1.51 | -0.41 | -0.37 | |||||||||||||
MAX | 33.16 | 32.83 | 34.71 | 42.57 | 48.65 | 57.70 | 61.45 | 59.19 | 48.93 | 38.94 | 34.47 | 28.29 | 40.11 | |||||||||||||
MIN | 7.00 | 15.04 | 27.52 | 31.70 | 40.19 | 47.57 | 51.74 | 51.39 | 41.43 | 32.16 | 14.90 | 10.40 | 34.59 | |||||||||||||
YRS | 26 | 26 | 25 | 25 | 27 | 27 | 27 | 26 | 27 | 26 | 26 | 25 | 24 |