YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | -17.00 | ----- | 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 | -10.00 | a | 4.00 | a | 3.00 | 26.00 | a | 40.00 | b | 36.00 | 45.00 | 47.00 | a | 35.00 | a | 23.00 | 19.00 | -11.00 | b | -11.00 | i | |||||
1999 | -17.00 | 10.00 | 6.00 | a | 26.00 | a | 36.00 | a | 39.00 | 49.00 | 44.00 | 31.00 | 20.00 | 14.00 | a | -7.00 | -17.00 | d | ||||||||
2000 | -10.00 | a | -16.00 | a | 14.00 | 20.00 | a | 32.00 | 41.00 | a | 45.00 | 42.00 | 33.00 | 29.00 | a | 10.00 | -20.00 | -20.00 | e | |||||||
2001 | -7.00 | -7.00 | 11.00 | a | 26.00 | a | 35.00 | 40.00 | 45.00 | e | 41.00 | 33.00 | 22.00 | a | 24.00 | 6.00 | -7.00 | h | ||||||||
2002 | -8.00 | -1.00 | -10.00 | 21.00 | 29.00 | 42.00 | 46.00 | 46.00 | 36.00 | 22.00 | 13.00 | 2.00 | -10.00 | |||||||||||||
2003 | -11.00 | -14.00 | a | -4.00 | a | 13.00 | b | 25.00 | a | 36.00 | 43.00 | 44.00 | 31.00 | 24.00 | 12.00 | 3.00 | -14.00 | e | ||||||||
2004 | -15.00 | -13.00 | c | 10.00 | 22.00 | 25.00 | 41.00 | 45.00 | 36.00 | a | 31.00 | 24.00 | 15.00 | -13.00 | -15.00 | d | ||||||||||
2005 | -12.00 | 1.00 | -7.00 | 24.00 | 26.00 | 43.00 | 45.00 | 45.00 | 38.00 | 26.00 | 8.00 | -3.00 | -12.00 | |||||||||||||
2006 | 13.00 | -17.00 | 7.00 | 21.00 | 30.00 | 39.00 | 48.00 | 46.00 | a | 33.00 | 22.00 | 21.00 | 2.00 | -17.00 | a | |||||||||||
2007 | -2.00 | -15.00 | -7.00 | 18.00 | 36.00 | 40.00 | 41.00 | 45.00 | a | 28.00 | 26.00 | 11.00 | -6.00 | -15.00 | a | |||||||||||
2008 | -13.00 | -19.00 | -4.00 | 24.00 | 29.00 | 44.00 | b | 47.00 | 45.00 | 38.00 | 23.00 | 8.00 | -10.00 | -19.00 | b | |||||||||||
2009 | -18.00 | -7.00 | -9.00 | 23.00 | 34.00 | 37.00 | 43.00 | 38.00 | 35.00 | 27.00 | 22.00 | -4.00 | -18.00 | |||||||||||||
2010 | -4.00 | -7.00 | 7.00 | 26.00 | 28.00 | a | 47.00 | 50.00 | 45.00 | 35.00 | 26.00 | 15.00 | -12.00 | -12.00 | a | |||||||||||
2011 | -12.00 | -17.00 | 7.00 | 17.00 | 28.00 | 39.00 | 55.00 | 47.00 | 33.00 | 26.00 | 19.00 | 9.00 | -17.00 | |||||||||||||
2012 | -11.00 | 1.00 | 2.00 | 26.00 | 38.00 | 42.00 | 52.00 | 46.00 | 32.00 | 23.00 | 12.00 | 8.00 | -11.00 | |||||||||||||
2013 | -9.00 | -9.00 | -3.00 | 20.00 | 28.00 | 40.00 | 46.00 | 40.00 | 35.00 | 24.00 | 8.00 | -12.00 | -12.00 | |||||||||||||
2014 | -19.00 | -17.00 | -16.00 | 19.00 | 32.00 | a | 44.00 | 46.00 | 44.00 | 35.00 | 27.00 | a | 1.00 | -2.00 | -19.00 | b | ||||||||||
2015 | -11.00 | -14.00 | -12.00 | 23.00 | 30.00 | 39.00 | 42.00 | a | 47.00 | 37.00 | 23.00 | 16.00 | 13.00 | -14.00 | a | |||||||||||
2016 | -8.00 | -11.00 | 1.00 | 15.00 | 30.00 | 41.00 | 50.00 | 47.00 | 45.00 | 26.00 | 17.00 | -11.00 | -11.00 | |||||||||||||
2017 | -7.00 | 1.00 | 5.00 | 25.00 | 26.00 | 43.00 | 49.00 | 41.00 | 37.00 | 26.00 | 10.00 | -10.00 | -10.00 | |||||||||||||
2018 | -11.00 | -10.00 | 13.00 | 12.00 | 38.00 | 39.00 | 48.00 | 49.00 | 32.00 | 24.00 | 11.00 | 11.00 | -11.00 | |||||||||||||
2019 | -26.00 | -24.00 | -13.00 | 20.00 | 34.00 | 43.00 | 50.00 | 45.00 | 44.00 | 24.00 | 5.00 | -1.00 | -26.00 | |||||||||||||
2020 | -3.00 | -13.00 | 17.00 | 21.00 | 24.00 | 42.00 | 54.00 | 44.00 | 33.00 | 22.00 | 20.00 | 2.00 | -13.00 | |||||||||||||
2021 | -5.00 | -14.00 | 15.00 | 18.00 | 28.00 | 40.00 | 46.00 | 51.00 | 39.00 | 27.00 | 13.00 | 1.00 | -14.00 | |||||||||||||
2022 | -15.00 | -3.00 | 2.00 | 23.00 | 30.00 | 42.00 | 47.00 | 46.00 | 31.00 | 26.00 | 9.00 | -10.00 | -15.00 | |||||||||||||
2023 | -9.00 | -8.00 | 6.00 | 24.00 | 32.00 | 36.00 | 49.00 | 40.00 | 39.00 | 25.00 | 8.00 | 14.00 | -9.00 | |||||||||||||
2024 | -6.00 | 4.00 | 10.00 | 24.00 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -10.11 | -8.70 | 1.89 | 21.37 | 30.88 | 40.58 | 47.15 | 44.27 | 34.96 | 24.50 | 13.12 | -2.35 | -14.41 | |||||||||||||
S.D. | 6.98 | 8.37 | 9.31 | 3.96 | 4.40 | 2.69 | 3.44 | 3.37 | 3.95 | 2.10 | 5.56 | 9.08 | 3.98 | |||||||||||||
SKEW | 0.84 | 0.43 | -0.26 | -0.77 | 0.38 | 0.10 | 0.44 | -0.57 | 0.84 | -0.03 | 0.07 | 0.14 | -1.05 | |||||||||||||
MAX | 13.00 | 10.00 | 17.00 | 26.00 | 40.00 | 47.00 | 55.00 | 51.00 | 45.00 | 29.00 | 24.00 | 14.00 | -9.00 | |||||||||||||
MIN | -26.00 | -24.00 | -16.00 | 12.00 | 24.00 | 36.00 | 41.00 | 36.00 | 28.00 | 20.00 | 1.00 | -20.00 | -26.00 | |||||||||||||
YRS | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 22 |