YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 55.52 | f | 64.05 | k | 64.70 | a | 64.00 | a | ----- | z | ----- | z | 32.40 | 31.16 | 48.07 | h | ||
1992 | 28.29 | 34.17 | 41.77 | r | 44.45 | a | 53.52 | 59.40 | 64.37 | a | 61.48 | 56.39 | b | 45.00 | a | ----- | z | 28.48 | d | 47.56 | b | |||||
1993 | 29.13 | 29.69 | b | 35.48 | 42.89 | c | 50.07 | c | 62.65 | d | 67.67 | a | 65.33 | a | 54.46 | b | 43.92 | e | 31.14 | b | 29.45 | 45.16 | ||||
1994 | 26.19 | 28.52 | a | 37.35 | 43.93 | c | 55.76 | b | 65.50 | f | 67.90 | b | 66.00 | b | 58.17 | a | ----- | z | 39.92 | e | 33.79 | c | 45.75 | b | ||
1995 | 29.57 | a | 35.20 | c | 37.50 | a | 40.66 | a | 55.61 | 61.29 | b | 65.50 | o | 67.50 | y | 59.70 | 47.30 | a | 37.21 | a | 31.64 | c | 43.57 | b | ||
1996 | 26.93 | c | 33.30 | f | 30.52 | j | 44.14 | b | 59.42 | 65.79 | b | 68.54 | c | 65.86 | c | 57.10 | 45.82 | i | 35.90 | j | 27.68 | i | 55.40 | e | ||
1997 | 27.38 | b | 31.29 | 39.79 | b | 42.00 | d | 54.97 | b | 61.50 | d | 65.79 | c | 65.21 | b | 61.32 | b | ----- | z | 32.38 | d | 25.68 | f | 48.16 | b | |
1998 | 29.83 | a | 32.42 | b | 34.55 | b | 41.93 | c | 58.59 | b | 65.68 | e | ----- | z | ----- | z | 62.90 | 51.57 | c | 41.90 | a | 31.58 | 45.09 | b | ||
1999 | 31.77 | e | 34.46 | b | 38.36 | q | 45.81 | d | 52.17 | h | 63.21 | a | 66.56 | d | 67.07 | a | 58.56 | c | 45.68 | f | 39.40 | e | 27.07 | c | 48.21 | c |
2000 | 28.52 | h | 36.62 | c | 38.39 | m | ----- | z | ----- | z | ----- | z | 68.81 | o | 66.39 | 59.70 | 47.83 | g | 34.97 | a | 27.32 | c | 45.00 | g | ||
2001 | 28.86 | c | 32.04 | e | 38.37 | a | 46.26 | c | 57.89 | c | 65.97 | 69.50 | a | 67.37 | a | 60.48 | a | 47.22 | d | 41.54 | d | 29.74 | d | 48.77 | ||
2002 | 29.07 | a | 28.00 | 33.61 | c | 50.69 | a | 56.69 | b | 67.20 | e | 67.25 | c | 68.18 | c | 59.32 | b | 50.67 | a | 37.23 | 30.13 | a | 48.17 | |||
2003 | 28.68 | c | 31.80 | c | 39.40 | a | 46.63 | 56.10 | 63.57 | 65.50 | a | 67.10 | 59.28 | a | 51.35 | 39.50 | 26.93 | a | 47.99 | |||||||
2004 | 30.77 | 29.50 | a | 43.84 | 46.76 | a | 56.47 | a | 63.97 | 66.29 | c | 62.56 | d | 58.28 | a | 51.06 | 37.70 | 28.34 | b | 47.96 | ||||||
2005 | 34.23 | a | 35.67 | a | 37.45 | 44.11 | c | 54.58 | 62.03 | a | 64.60 | a | 64.42 | 60.31 | a | 48.71 | c | 35.73 | d | 27.70 | a | 47.46 | ||||
2006 | 30.54 | c | 31.92 | b | 41.57 | a | 48.90 | 56.60 | a | 64.03 | 66.77 | ----- | z | 56.83 | a | 47.42 | 37.57 | b | 27.63 | a | 46.34 | a | ||||
2007 | 26.35 | 30.19 | a | 41.16 | 41.83 | 54.39 | 61.54 | d | 64.52 | 64.97 | a | 61.30 | 48.81 | ----- | z | ----- | z | 49.50 | b | |||||||
2008 | ----- | z | ----- | z | ----- | z | 43.29 | w | 55.06 | 66.52 | a | 66.23 | 64.43 | a | 56.40 | 46.77 | 34.70 | ----- | z | 55.73 | e | |||||
2009 | 25.10 | 32.18 | k | 38.90 | 43.13 | 55.90 | 64.97 | 66.90 | 65.42 | 54.55 | j | 44.68 | 36.03 | 24.40 | a | 46.54 | b | |||||||||
2010 | 24.65 | 30.00 | 34.97 | 45.53 | 53.00 | b | 66.33 | 66.03 | 65.45 | 60.29 | f | 46.71 | 33.63 | 28.00 | 44.94 | a | ||||||||||
2011 | 22.90 | 25.18 | 38.65 | 47.03 | 52.00 | 67.70 | 69.97 | 70.06 | 59.30 | 47.55 | 35.33 | 28.23 | 46.99 | |||||||||||||
2012 | 28.97 | 31.21 | 39.58 | 48.93 | 56.87 | 65.33 | 66.55 | 67.52 | h | 58.77 | 45.68 | 39.63 | 28.00 | 46.32 | a | |||||||||||
2013 | 27.90 | 29.46 | 35.48 | 41.60 | 54.42 | 66.33 | 65.90 | 66.13 | 60.77 | 47.00 | 35.33 | 27.65 | 46.50 | |||||||||||||
2014 | 22.48 | 30.89 | 34.16 | 45.20 | 54.39 | 65.60 | 68.23 | 67.39 | 61.60 | 49.97 | 33.70 | 32.16 | 47.15 | |||||||||||||
2015 | 26.52 | 30.93 | 37.58 | 45.63 | 53.42 | 63.40 | 67.65 | 66.55 | 62.40 | 52.06 | 36.60 | 30.39 | 47.76 | |||||||||||||
2016 | 26.32 | 32.34 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.67 | u | ----- | z | 43.33 | ----- | z | 34.00 | i | |||
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 |
2019 | ----- | z | 30.48 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.48 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.93 | 31.39 | 37.86 | 44.91 | 55.26 | 64.27 | 66.70 | 65.78 | 59.24 | 48.08 | 36.82 | 29.04 | 47.39 | |||||||||||||
S.D. | 2.75 | 2.64 | 2.73 | 2.63 | 2.14 | 2.21 | 1.55 | 1.88 | 2.13 | 2.47 | 3.23 | 2.19 | 1.02 | |||||||||||||
SKEW | -0.00 | 0.01 | 0.29 | 0.36 | -0.30 | -0.42 | 0.35 | -0.14 | -0.32 | 0.12 | 0.22 | 0.26 | -0.93 | |||||||||||||
MAX | 34.23 | 36.62 | 43.84 | 50.69 | 59.42 | 67.70 | 69.97 | 70.06 | 62.90 | 52.06 | 43.33 | 33.79 | 48.77 | |||||||||||||
MIN | 22.48 | 25.18 | 33.61 | 40.66 | 50.07 | 59.40 | 64.37 | 61.48 | 54.46 | 43.92 | 31.14 | 24.40 | 45.16 | |||||||||||||
YRS | 23 | 23 | 19 | 22 | 22 | 22 | 22 | 21 | 22 | 19 | 23 | 21 | 10 |