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 | 43.67 | 44.68 | 48.03 | a | 48.89 | c | 51.90 | 53.14 | b | 52.55 | ----- | z | 43.79 | c | 48.33 | d | ||||
2000 | 43.34 | b | 44.46 | a | 43.42 | 46.73 | 48.71 | c | 51.78 | c | 51.36 | c | 53.52 | b | 55.93 | 48.32 | 42.25 | b | 43.63 | a | 47.79 | |||||
2001 | 40.39 | 40.85 | a | 46.00 | a | 41.83 | a | 51.88 | e | 54.08 | d | 50.70 | a | 53.33 | a | 51.86 | a | 53.59 | b | 48.79 | k | 42.74 | 47.93 | a | ||
2002 | 39.87 | a | 44.25 | ----- | z | 45.63 | c | 45.50 | a | ----- | z | ----- | z | ----- | z | 54.23 | q | 51.52 | 48.48 | c | 43.76 | b | 45.57 | e | ||
2003 | 46.40 | a | 43.04 | a | ----- | z | 42.41 | c | 48.32 | ----- | z | ----- | z | ----- | z | 55.31 | q | 54.84 | 44.47 | 42.71 | 46.03 | e | ||||
2004 | ----- | z | 42.76 | 50.26 | 47.87 | 48.10 | j | ----- | z | ----- | z | ----- | z | 53.67 | o | 50.26 | 46.35 | g | 43.71 | 46.97 | g | |||||
2005 | 39.84 | 46.46 | 47.70 | a | 43.92 | f | 49.38 | b | ----- | z | ----- | z | ----- | z | 50.25 | j | 51.23 | a | 48.60 | 44.65 | 46.84 | e | ||||
2006 | 43.03 | a | 43.96 | 39.87 | ----- | z | 44.67 | y | 51.83 | 54.70 | a | 50.45 | b | 51.13 | 49.79 | b | 44.60 | e | 41.83 | b | 47.12 | b | ||||
2007 | 38.90 | 41.92 | b | 45.90 | 43.87 | 46.63 | d | 50.67 | o | ----- | z | ----- | z | 51.10 | t | 48.24 | b | 46.82 | b | 37.39 | m | 44.61 | e | |||
2008 | 39.00 | h | 41.07 | 42.77 | 44.05 | i | 46.13 | a | ----- | z | ----- | z | ----- | z | 52.60 | o | 51.38 | b | 48.70 | c | 39.76 | n | 46.01 | g | ||
2009 | 43.58 | 41.79 | 41.81 | 44.15 | j | 47.89 | d | 48.73 | 49.23 | a | 52.03 | a | 53.40 | 48.62 | g | 44.90 | a | 39.03 | a | 46.24 | b | |||||
2010 | 42.65 | 43.79 | 42.00 | 42.00 | a | 43.84 | l | ----- | z | ----- | z | ----- | z | 56.50 | n | 50.80 | p | 44.07 | 43.10 | a | 42.93 | f | ||||
2011 | 41.05 | i | 40.27 | b | 42.35 | e | 42.31 | a | 44.55 | ----- | z | ----- | z | ----- | z | 55.18 | m | 53.18 | i | 42.70 | 40.71 | 42.15 | f | |||
2012 | 43.38 | g | 41.25 | a | 40.97 | 44.57 | 47.32 | l | ----- | z | ----- | z | ----- | z | 47.41 | m | 52.03 | 46.52 | a | 42.06 | o | 45.07 | g | |||
2013 | 38.30 | a | 39.25 | 42.81 | 47.30 | c | 48.07 | a | 52.07 | 49.45 | 53.39 | 52.47 | 48.07 | a | 46.87 | 40.15 | d | 46.51 | ||||||||
2014 | 46.05 | i | 43.00 | 46.23 | 45.41 | h | 50.42 | e | ----- | z | ----- | z | 54.33 | v | 53.50 | 54.81 | 48.67 | l | 45.89 | d | 48.97 | f | ||||
2015 | 46.42 | l | 47.08 | b | 47.43 | a | 44.48 | a | 45.35 | ----- | z | ----- | z | ----- | z | 57.68 | h | 54.06 | 43.60 | 39.80 | a | 45.97 | e | |||
2016 | 41.50 | u | 45.97 | 44.38 | b | 46.82 | b | 47.73 | e | ----- | z | ----- | z | 51.00 | v | 52.21 | b | 50.94 | m | 46.97 | 40.13 | 46.32 | e | |||
2017 | 38.27 | e | 43.58 | b | 44.94 | 45.24 | a | 48.37 | a | ----- | z | ----- | z | ----- | z | 57.23 | d | 53.21 | l | 46.31 | a | 42.90 | 45.85 | d | ||
2018 | 44.38 | b | 42.41 | a | 41.90 | k | 45.41 | a | 47.80 | a | ----- | z | ----- | z | ----- | z | 48.55 | j | 50.90 | 48.45 | j | 42.29 | 45.53 | f | ||
2019 | 45.29 | j | 35.67 | a | 42.48 | 47.17 | l | 45.23 | a | ----- | z | ----- | z | ----- | z | 54.35 | g | 50.38 | e | 45.27 | 42.68 | 43.62 | f | |||
2020 | 41.00 | 44.31 | 41.81 | 44.25 | b | 47.97 | b | 50.30 | c | 52.57 | a | 55.43 | a | 57.20 | 57.75 | g | 43.90 | 39.60 | a | 47.12 | a | |||||
2021 | 43.69 | b | 42.64 | 42.79 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.17 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.69 | 42.72 | 44.06 | 44.65 | 47.48 | 50.97 | 50.99 | 52.87 | 53.81 | 51.37 | 45.59 | 42.27 | 47.15 | |||||||||||||
S.D. | 2.52 | 2.52 | 2.73 | 1.92 | 2.00 | 2.09 | 2.09 | 1.58 | 2.20 | 2.20 | 2.02 | 1.89 | 0.90 | |||||||||||||
SKEW | 0.16 | -0.72 | 0.60 | 0.06 | 0.32 | -0.09 | 0.73 | 0.09 | 0.61 | 0.08 | 0.07 | -0.14 | 0.00 | |||||||||||||
MAX | 46.40 | 47.08 | 50.26 | 47.87 | 51.88 | 54.08 | 54.70 | 55.43 | 57.23 | 54.84 | 48.70 | 45.89 | 47.79 | |||||||||||||
MIN | 38.27 | 35.67 | 39.87 | 41.83 | 44.55 | 48.03 | 48.89 | 50.45 | 51.13 | 48.07 | 42.25 | 39.03 | 46.51 | |||||||||||||
YRS | 14 | 22 | 18 | 16 | 18 | 7 | 7 | 7 | 10 | 16 | 17 | 19 | 2 |