YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | 54.83 | a | 55.08 | a | 61.19 | a | 62.54 | d | 64.72 | a | 63.98 | b | 63.85 | a | ----- | z | 51.20 | c | 59.67 | d |
2000 | 48.62 | b | 49.64 | a | 52.57 | b | 55.93 | a | 59.09 | d | 61.74 | e | 63.93 | c | 66.02 | c | 66.78 | a | 57.68 | 49.48 | b | 50.74 | b | 56.85 | ||
2001 | 47.37 | 47.46 | a | 54.83 | a | 51.23 | b | 64.27 | e | 66.75 | d | 62.10 | a | 66.03 | a | 62.78 | a | 63.74 | d | 55.58 | k | 47.26 | 57.62 | a | ||
2002 | 46.47 | a | 51.95 | ----- | z | 54.37 | c | 57.27 | a | ----- | z | ----- | z | ----- | z | 66.35 | q | 61.43 | b | 56.46 | c | 49.21 | c | 53.88 | e | |
2003 | 51.75 | a | 50.63 | a | ----- | z | 50.44 | c | 58.83 | a | ----- | z | ----- | z | ----- | z | 66.54 | q | 66.07 | a | 50.40 | 47.55 | 53.67 | e | ||
2004 | ----- | z | 48.69 | 59.50 | 57.40 | a | 58.85 | k | ----- | z | ----- | z | ----- | z | 65.03 | o | 59.17 | b | 53.22 | g | 49.48 | 54.85 | g | |||
2005 | 45.89 | 51.59 | 55.10 | a | 53.83 | f | 58.18 | c | ----- | z | ----- | z | ----- | z | 62.02 | j | 60.88 | c | 55.77 | 49.61 | 53.86 | e | ||||
2006 | 48.83 | a | 51.46 | 45.62 | a | ----- | z | ----- | z | 65.57 | b | 69.91 | d | 62.73 | c | 63.15 | c | 60.43 | d | 51.48 | g | 48.43 | b | 57.35 | c | |
2007 | 47.66 | 48.60 | b | 56.18 | a | 54.84 | b | 59.33 | d | 63.50 | o | ----- | z | ----- | z | 63.60 | t | 58.21 | e | 55.38 | b | 43.68 | n | 54.31 | e | |
2008 | 45.02 | h | 49.31 | 52.52 | 56.62 | j | 58.95 | c | ----- | z | ----- | z | ----- | z | 63.93 | p | 62.46 | c | 55.78 | c | 44.91 | o | 55.80 | g | ||
2009 | 51.53 | 48.39 | 51.29 | 55.08 | j | 58.30 | f | 60.96 | b | 63.59 | c | 65.22 | d | 67.54 | e | 57.95 | i | 52.82 | b | 44.72 | a | 56.23 | c | |||
2010 | 47.02 | 49.95 | 51.02 | a | 52.05 | b | 55.66 | l | ----- | z | ----- | z | ----- | z | 66.93 | o | 59.50 | p | 52.48 | 47.60 | a | 50.02 | f | |||
2011 | 49.07 | i | 48.96 | b | 49.94 | f | 52.70 | b | 55.72 | a | ----- | z | ----- | z | ----- | z | 68.59 | n | 62.55 | i | 50.65 | 49.95 | 51.60 | g | ||
2012 | 52.39 | h | 50.00 | a | 48.85 | 54.60 | a | 60.71 | l | ----- | z | ----- | z | ----- | z | 61.74 | m | 61.21 | 54.38 | a | 48.83 | p | 53.81 | g | ||
2013 | 46.53 | a | 49.38 | 53.02 | 58.94 | c | 60.92 | a | 64.35 | 62.55 | a | 64.65 | 63.78 | a | 59.91 | b | 56.10 | 49.61 | d | 57.48 | ||||||
2014 | 56.48 | i | 50.66 | 55.34 | 56.60 | i | 62.92 | e | ----- | z | ----- | z | 65.89 | v | 63.93 | 64.71 | 57.61 | l | 51.20 | h | 59.51 | g | ||||
2015 | 54.37 | l | 56.31 | b | 58.28 | a | 55.84 | a | 56.16 | ----- | z | ----- | z | ----- | z | 70.86 | i | 64.27 | 51.85 | 46.12 | a | 55.55 | e | |||
2016 | 47.10 | u | 55.74 | 52.67 | b | 57.77 | d | 57.98 | e | ----- | z | ----- | z | 60.44 | v | 64.86 | b | 58.97 | m | 53.78 | 47.16 | 55.71 | e | |||
2017 | 44.90 | e | 49.67 | b | 53.70 | a | 54.95 | a | 60.20 | a | ----- | z | ----- | z | ----- | z | 68.52 | d | 63.00 | l | 52.55 | a | 50.90 | 54.42 | d | |
2018 | 49.64 | b | 52.13 | a | 50.27 | k | 55.14 | a | 58.52 | a | ----- | z | ----- | z | ----- | z | 61.00 | j | 61.11 | 58.45 | j | 49.02 | 54.26 | f | ||
2019 | 51.79 | j | 43.24 | a | 50.06 | 58.22 | l | 53.92 | a | ----- | z | ----- | z | ----- | z | 65.24 | g | 62.92 | e | 55.43 | 48.05 | 52.27 | f | |||
2020 | 47.56 | 54.09 | 50.84 | 55.04 | b | 60.50 | b | 64.57 | c | 63.34 | c | 68.25 | a | 68.87 | 70.58 | g | 53.25 | 49.33 | a | 57.79 | a | |||||
2021 | 49.29 | b | 50.00 | a | 53.11 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.65 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.08 | 50.36 | 53.02 | 54.75 | 58.70 | 63.59 | 63.99 | 65.37 | 65.42 | 61.75 | 53.54 | 48.66 | 57.16 | |||||||||||||
S.D. | 2.00 | 2.77 | 3.41 | 2.30 | 2.67 | 2.29 | 2.69 | 1.69 | 2.29 | 2.40 | 2.21 | 1.71 | 0.44 | |||||||||||||
SKEW | 0.45 | 0.05 | -0.08 | -0.17 | 0.23 | 0.03 | 1.79 | 0.20 | 0.41 | 0.01 | -0.33 | -0.55 | 0.00 | |||||||||||||
MAX | 51.75 | 56.31 | 59.50 | 58.94 | 64.27 | 66.75 | 69.91 | 68.25 | 68.87 | 66.07 | 56.46 | 51.20 | 57.48 | |||||||||||||
MIN | 44.90 | 43.24 | 45.62 | 50.44 | 53.92 | 60.96 | 62.10 | 62.73 | 62.78 | 57.68 | 49.48 | 44.72 | 56.85 | |||||||||||||
YRS | 14 | 22 | 17 | 16 | 17 | 7 | 7 | 7 | 10 | 16 | 16 | 18 | 2 |