YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 38.31 | 39.33 | 42.94 | 47.08 | 53.66 | 62.73 | s | 62.61 | 61.48 | 57.48 | 50.16 | 41.85 | 36.56 | 48.32 | a | |||||||||||
1949 | 27.34 | 38.30 | 45.39 | 50.50 | 56.81 | 57.95 | 62.63 | 62.77 | 61.13 | 47.58 | 49.28 | 39.45 | 49.93 | |||||||||||||
1950 | 27.06 | 39.25 | 43.42 | 46.80 | 51.84 | 60.93 | 62.89 | 64.92 | 60.08 | 50.32 | 45.13 | 45.90 | 49.88 | |||||||||||||
1951 | 38.45 | 42.11 | 40.53 | 51.17 | 54.56 | 61.27 | 63.52 | 62.74 | 60.88 | 51.60 | 44.12 | 37.26 | 50.68 | |||||||||||||
1952 | 36.23 | 41.21 | 42.71 | 49.20 | 54.32 | 57.78 | 63.98 | 64.03 | 61.33 | a | 54.85 | 39.90 | 41.19 | 50.56 | ||||||||||||
1953 | 46.29 | 42.52 | 44.27 | 47.97 | 53.47 | 56.63 | 62.73 | 63.29 | ----- | z | ----- | z | ----- | z | ----- | z | 52.15 | d | ||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | 39.68 | 43.79 | 44.92 | 52.73 | 56.28 | a | 61.43 | a | 64.92 | 64.27 | a | 61.31 | a | 53.50 | b | 41.43 | c | 40.83 | b | 52.09 | ||||||
2001 | 41.50 | 41.18 | 47.38 | a | 48.32 | 55.97 | a | 58.67 | a | 63.46 | c | 65.63 | a | 61.09 | c | 52.32 | a | 48.02 | 41.52 | b | 52.09 | |||||
2002 | 42.82 | a | 43.96 | a | 42.40 | g | 50.33 | d | 53.56 | e | 62.30 | e | 65.03 | p | 65.35 | d | 60.65 | j | 52.63 | d | 46.39 | h | 43.47 | b | 51.80 | d |
2003 | 45.91 | d | 43.20 | h | 49.44 | e | 50.36 | a | 55.37 | 63.22 | a | 66.59 | d | 66.89 | c | 63.65 | 57.47 | 43.71 | b | 42.75 | a | 55.03 | a | |||
2004 | 41.04 | c | 45.38 | a | 50.19 | 53.38 | b | 57.88 | b | 64.85 | f | 73.03 | a | 70.22 | a | 60.72 | c | 55.74 | d | 45.17 | a | 43.22 | b | 54.18 | a | |
2005 | 42.31 | g | 43.08 | b | 50.50 | b | 51.94 | f | 58.70 | a | 60.13 | 66.94 | 67.95 | a | 59.93 | 55.72 | a | 43.78 | e | 40.06 | 54.68 | b | ||||
2006 | 45.80 | a | 41.26 | a | 46.19 | 51.55 | 56.81 | 62.55 | 67.17 | a | 65.76 | 62.73 | b | 52.81 | 46.25 | 39.44 | f | 54.44 | a | |||||||
2007 | 36.67 | m | 44.54 | c | 49.58 | e | 50.67 | a | 56.00 | 60.22 | 67.68 | a | 65.68 | 60.00 | d | 52.09 | d | 45.14 | b | 40.87 | 53.86 | a | ||||
2008 | 38.27 | 44.21 | a | 44.86 | b | 47.93 | b | 56.82 | 58.58 | 65.48 | 66.48 | 61.97 | 53.10 | 47.89 | g | 36.47 | m | 53.77 | b | |||||||
2009 | 39.50 | e | 41.38 | 43.33 | a | 50.46 | c | 56.93 | a | 62.72 | 69.32 | 67.15 | 63.46 | b | 53.06 | 47.32 | ----- | z | 54.06 | a | ||||||
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.21 | x | ----- | z | 60.90 | y | ----- | 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 |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.16 | 42.10 | 45.71 | 49.90 | 55.56 | 60.31 | 65.53 | 65.29 | 61.13 | 52.86 | 44.70 | 41.09 | 50.87 | |||||||||||||
S.D. | 5.95 | 2.10 | 3.08 | 1.97 | 1.85 | 2.09 | 2.98 | 2.21 | 1.58 | 2.48 | 2.68 | 2.62 | 1.00 | |||||||||||||
SKEW | -0.92 | -0.24 | 0.25 | 0.01 | -0.29 | -0.25 | 1.08 | 0.33 | -0.39 | -0.16 | -0.07 | -0.08 | 0.39 | |||||||||||||
MAX | 46.29 | 45.38 | 50.50 | 53.38 | 58.70 | 63.22 | 73.03 | 70.22 | 63.65 | 57.47 | 49.28 | 45.90 | 52.09 | |||||||||||||
MIN | 27.06 | 38.30 | 40.53 | 46.80 | 51.84 | 56.63 | 62.61 | 61.48 | 57.48 | 47.58 | 39.90 | 36.56 | 49.88 | |||||||||||||
YRS | 14 | 15 | 15 | 15 | 16 | 14 | 15 | 16 | 14 | 15 | 13 | 12 | 6 |