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 | 55.80 | c | 65.25 | 67.15 | 70.00 | 56.20 | 50.19 | 34.97 | 17.48 | 52.13 | d | |||||||
1963 | 2.21 | 11.09 | 32.58 | 45.58 | 55.10 | 68.83 | 73.47 | a | 69.60 | 62.95 | 58.44 | 34.82 | 7.65 | a | 43.53 | |||||||||||
1964 | 16.05 | i | 18.24 | b | 19.05 | a | 45.47 | ----- | z | ----- | z | 73.75 | k | 66.68 | a | 56.98 | a | 46.89 | 30.73 | 6.32 | 36.30 | d | ||||
1965 | 1.22 | a | 7.71 | 14.79 | 42.20 | 56.37 | 64.60 | 68.68 | 67.34 | 50.02 | 48.38 | a | 27.80 | 21.15 | 39.19 | |||||||||||
1966 | -4.84 | 8.12 | 30.23 | 37.80 | 52.23 | 66.02 | a | 74.08 | 66.16 | 59.17 | 46.84 | b | 24.24 | a | 12.60 | a | 39.39 | |||||||||
1967 | 9.11 | 4.61 | 27.24 | b | 40.78 | 50.48 | 63.68 | 69.06 | 67.74 | 61.12 | 44.81 | 29.25 | 15.03 | 40.24 | ||||||||||||
1968 | 7.26 | b | 8.72 | 34.21 | 43.52 | 52.69 | 64.38 | 69.23 | 67.92 | 59.57 | 47.10 | 30.77 | 10.03 | 41.28 | ||||||||||||
1969 | -0.21 | 14.52 | 17.24 | 45.68 | 57.50 | a | 58.90 | 69.77 | 74.10 | 59.88 | 41.10 | 30.62 | 16.45 | 40.46 | ||||||||||||
1970 | 0.29 | 9.64 | 19.20 | a | 40.87 | 54.18 | 68.88 | 73.40 | 70.84 | 61.08 | 46.35 | 28.17 | a | 10.10 | 40.25 | |||||||||||
1971 | -1.19 | 11.96 | 26.21 | 44.85 | 54.42 | 68.47 | 66.26 | 69.32 | 60.53 | a | 48.95 | 29.16 | a | 12.30 | a | 40.94 | ||||||||||
1972 | 0.71 | 4.19 | 24.23 | 40.62 | 60.19 | b | 66.70 | c | 68.25 | a | 70.19 | 56.53 | a | 43.24 | 27.43 | ----- | z | 42.03 | a | |||||||
1973 | 11.98 | a | 15.45 | 36.22 | b | 42.42 | 54.18 | 66.05 | 69.45 | 71.82 | 55.12 | 50.56 | 25.83 | 10.32 | 42.45 | |||||||||||
1974 | 1.40 | 10.37 | b | 20.85 | ----- | z | 50.31 | 64.82 | 73.28 | a | 64.24 | 52.83 | 45.57 | a | 29.38 | 19.69 | 39.34 | a | ||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.27 | 73.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.94 | j | ||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | 67.76 | b | 67.05 | 72.39 | 62.29 | 57.43 | ----- | z | ----- | z | 6.20 | c | 55.52 | f | ||||
1978 | -3.35 | 3.04 | 22.08 | ----- | z | 59.00 | b | 63.98 | ----- | z | ----- | z | ----- | z | 43.95 | 22.22 | a | 5.81 | d | 27.09 | d | |||||
1979 | -7.37 | -0.80 | 19.61 | 34.22 | 48.18 | 63.33 | 70.26 | 65.50 | 59.65 | 42.19 | 25.52 | 19.00 | 36.61 | |||||||||||||
1980 | 5.76 | 7.66 | 19.45 | a | 48.12 | 61.18 | 65.25 | 70.65 | 66.96 | c | 55.78 | a | 41.48 | b | 34.47 | o | 12.50 | c | 41.34 | a | ||||||
1981 | 11.57 | b | 17.44 | a | 34.76 | b | 45.83 | 55.73 | 62.67 | 71.02 | 69.50 | 56.63 | 42.89 | 36.00 | 10.68 | 42.89 | ||||||||||
1982 | -6.52 | d | 8.50 | 22.21 | b | 34.25 | j | 57.94 | 58.73 | 69.87 | a | 66.98 | d | 55.06 | c | 45.95 | a | 25.31 | a | 19.17 | b | 38.47 | a | |||
1983 | 15.10 | a | 20.70 | 29.40 | a | 40.33 | 51.63 | 64.78 | a | 73.53 | 72.89 | 56.45 | a | 42.66 | 29.76 | a | -2.87 | 41.20 | ||||||||
1984 | 6.34 | c | 22.07 | a | 20.37 | a | 44.60 | 52.00 | 64.17 | 68.45 | b | 71.13 | a | 50.45 | a | 44.90 | a | 25.96 | b | 8.40 | 39.90 | |||||
1985 | 3.65 | 4.82 | 31.03 | b | ----- | z | ----- | z | 59.25 | 69.05 | a | 63.40 | b | 54.07 | a | 41.95 | b | 16.02 | 1.57 | b | 34.48 | b | ||||
1986 | 9.38 | a | 7.41 | a | 29.07 | b | 42.68 | b | ----- | z | 66.87 | d | 69.69 | b | 63.19 | d | 53.85 | f | 43.98 | j | 21.32 | e | 19.43 | i | 38.70 | d |
1987 | 16.00 | l | 26.32 | h | 32.86 | i | ----- | z | 60.14 | t | ----- | z | 73.30 | p | ----- | 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 | 3.12 | 10.26 | 25.24 | 42.68 | 55.34 | 64.65 | 70.48 | 68.08 | 57.02 | 45.92 | 27.87 | 11.41 | 40.64 | |||||||||||||
S.D. | 6.33 | 5.99 | 6.39 | 3.41 | 4.49 | 2.81 | 2.30 | 3.19 | 3.44 | 4.01 | 4.73 | 6.22 | 1.79 | |||||||||||||
SKEW | 0.13 | 0.36 | 0.20 | -0.77 | 0.92 | -0.67 | 0.16 | -0.07 | -0.37 | 1.41 | -0.44 | -0.34 | -0.45 | |||||||||||||
MAX | 15.10 | 22.07 | 36.22 | 48.12 | 67.76 | 68.88 | 74.08 | 74.10 | 62.95 | 58.44 | 36.00 | 21.15 | 43.53 | |||||||||||||
MIN | -7.37 | -0.80 | 14.79 | 34.22 | 48.18 | 58.73 | 66.26 | 62.29 | 50.02 | 41.10 | 16.02 | -2.87 | 36.61 | |||||||||||||
YRS | 20 | 21 | 21 | 17 | 20 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 13 |