YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 45.63 | a | 55.90 | 56.06 | 57.29 | 44.47 | 38.61 | 27.47 | 7.29 | 41.59 | d | |||||||
1963 | -7.39 | -0.43 | 20.52 | 33.97 | 43.16 | 58.17 | 61.87 | 58.29 | 50.77 | 46.13 | 24.60 | -1.10 | 32.38 | |||||||||||||
1964 | 6.88 | g | 8.15 | b | 9.71 | 34.03 | ----- | z | ----- | z | 62.14 | j | 55.26 | 44.57 | 34.65 | 21.77 | -2.45 | 25.71 | d | |||||||
1965 | -8.26 | -3.57 | 4.55 | 33.53 | 44.87 | 53.37 | 57.03 | 54.61 | 41.27 | 36.84 | 18.03 | 12.74 | 28.75 | |||||||||||||
1966 | -14.61 | -1.50 | 21.00 | 29.23 | 38.48 | 53.48 | a | 61.61 | 55.13 | 46.03 | 34.63 | a | 15.17 | a | 2.87 | a | 28.46 | |||||||||
1967 | -1.81 | -8.29 | 16.86 | b | 30.70 | 37.68 | 52.47 | 54.48 | 53.23 | 47.87 | 33.61 | 20.20 | 6.29 | 28.61 | ||||||||||||
1968 | -4.10 | a | -2.03 | 21.87 | 31.10 | 40.81 | 52.77 | 56.52 | 54.35 | 48.17 | 36.55 | 23.23 | 2.39 | 30.13 | ||||||||||||
1969 | -9.87 | 5.89 | 6.26 | 34.13 | 43.03 | 47.03 | 57.58 | 59.90 | 47.90 | 32.68 | 21.90 | 7.81 | 29.52 | |||||||||||||
1970 | -9.42 | -3.50 | 9.43 | a | 30.70 | 41.97 | 55.93 | 59.16 | 56.16 | 47.77 | 36.10 | 20.97 | a | 0.32 | 28.80 | |||||||||||
1971 | -11.58 | 1.18 | 17.74 | 31.97 | 40.87 | 56.77 | 53.87 | 55.81 | 48.03 | 39.39 | 21.40 | 3.30 | a | 29.90 | ||||||||||||
1972 | -10.03 | -6.59 | 14.42 | 31.07 | 48.55 | 52.29 | b | 55.45 | 57.84 | 44.17 | 31.74 | 20.53 | ----- | z | 30.86 | a | ||||||||||
1973 | 2.20 | a | 4.21 | 28.52 | b | 30.33 | 41.29 | 53.13 | 56.52 | 59.74 | 43.47 | 39.35 | 17.17 | 1.26 | 31.43 | |||||||||||
1974 | -10.06 | -2.56 | a | 11.58 | ----- | z | 40.74 | 51.77 | 60.37 | a | 51.61 | 38.27 | 32.27 | a | 20.07 | 10.23 | 27.66 | a | ||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.13 | 61.29 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.21 | j | ||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | 54.93 | a | 55.00 | 60.90 | 50.06 | 48.27 | ----- | z | ----- | z | -3.00 | 44.36 | f | |||||
1978 | -12.39 | -7.93 | 11.74 | ----- | z | 47.24 | b | 50.97 | ----- | z | ----- | z | ----- | z | 30.26 | 10.03 | -5.74 | d | 15.52 | d | ||||||
1979 | -18.42 | -11.86 | 9.35 | 24.93 | 37.48 | 51.53 | 59.00 | 53.74 | 45.47 | 29.97 | 16.77 | 8.71 | 25.56 | |||||||||||||
1980 | -6.16 | -3.76 | 8.48 | 34.10 | 45.94 | 53.07 | 56.84 | 54.89 | c | 44.41 | a | 31.41 | b | 25.31 | n | 1.14 | b | 29.12 | a | |||||||
1981 | 0.20 | a | 7.30 | a | 23.10 | a | 34.00 | 43.94 | 51.87 | 59.81 | 57.45 | 43.83 | 33.19 | 25.03 | 1.55 | 31.77 | ||||||||||
1982 | -20.30 | d | -3.46 | 12.90 | b | 26.81 | c | 46.06 | 45.83 | 57.13 | a | 53.11 | d | 42.11 | b | 36.10 | a | 16.72 | a | 11.87 | a | 27.07 | ||||
1983 | 6.23 | a | 12.36 | 23.20 | a | 29.93 | 38.90 | 52.83 | a | 61.61 | 59.65 | 44.10 | a | 31.29 | 22.34 | a | -13.58 | 30.74 | ||||||||
1984 | -6.28 | b | 12.46 | a | 10.17 | a | 32.30 | 37.39 | 51.40 | 53.93 | b | 55.70 | a | 37.10 | a | 33.57 | a | 15.11 | b | -3.87 | 27.41 | |||||
1985 | -9.23 | -7.86 | 20.66 | b | ----- | z | ----- | z | 48.07 | 55.73 | a | 52.83 | b | 44.34 | a | 29.21 | b | 5.20 | -10.73 | a | 22.82 | b | ||||
1986 | -2.97 | a | -2.11 | a | 17.93 | b | 32.00 | b | ----- | z | 55.54 | b | 59.52 | b | 51.30 | d | 44.92 | f | 32.00 | g | 13.16 | e | 8.78 | h | 28.05 | d |
1987 | 7.00 | k | 18.25 | h | 23.00 | h | ----- | z | 48.73 | t | ----- | z | 61.69 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | -7.71 | -0.66 | 15.24 | 31.38 | 42.95 | 52.71 | 58.01 | 55.36 | 44.87 | 34.64 | 18.90 | 1.78 | 29.32 | |||||||||||||
S.D. | 6.52 | 6.78 | 6.52 | 2.58 | 4.39 | 2.94 | 2.61 | 2.77 | 3.35 | 4.00 | 5.24 | 6.95 | 1.91 | |||||||||||||
SKEW | 0.15 | 0.52 | 0.20 | -0.96 | 0.89 | -0.52 | 0.02 | 0.00 | -0.60 | 1.08 | -0.83 | -0.40 | -0.19 | |||||||||||||
MAX | 6.23 | 12.46 | 28.52 | 34.13 | 54.93 | 58.17 | 61.87 | 59.90 | 50.77 | 46.13 | 27.47 | 12.74 | 32.38 | |||||||||||||
MIN | -20.30 | -11.86 | 4.55 | 24.93 | 37.39 | 45.83 | 53.87 | 50.06 | 37.10 | 29.21 | 5.20 | -13.58 | 25.56 | |||||||||||||
YRS | 20 | 21 | 21 | 18 | 20 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 14 |