YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 31.87 | 15.53 | -3.00 | 14.80 | i | |||
1990 | 12.63 | a | 7.00 | 21.48 | 29.57 | 42.19 | 54.70 | 56.00 | 54.61 | 47.73 | 29.13 | a | 21.40 | 2.19 | 31.55 | |||||||||||
1991 | -2.52 | 9.79 | 18.90 | 34.23 | 49.26 | 58.93 | 59.03 | 59.07 | a | 45.34 | a | 30.26 | 13.63 | 9.48 | 32.12 | |||||||||||
1992 | 10.32 | 17.07 | 23.58 | 28.80 | 43.71 | 51.57 | 52.71 | 50.40 | a | 42.60 | 30.58 | 21.28 | a | 2.87 | 31.29 | |||||||||||
1993 | -5.03 | 1.33 | a | 12.74 | 31.80 | 43.35 | 51.73 | 57.61 | 57.03 | 41.30 | 30.32 | 15.17 | 3.54 | c | 28.41 | |||||||||||
1994 | -12.77 | -8.44 | a | 19.74 | 32.70 | 46.67 | a | 56.07 | 57.00 | 54.16 | 48.73 | 37.97 | 24.17 | 11.42 | 30.62 | |||||||||||
1995 | 3.13 | 4.26 | a | 17.61 | 29.79 | a | 43.20 | a | 58.87 | 59.19 | 60.19 | 45.07 | 35.58 | 15.30 | 7.03 | 31.60 | ||||||||||
1996 | -8.45 | 3.45 | 10.53 | a | 28.77 | 41.77 | 56.41 | a | 57.43 | a | 55.66 | b | 45.80 | 33.68 | 9.86 | a | -1.55 | 27.78 | ||||||||
1997 | -7.97 | 2.00 | a | 13.64 | c | 28.14 | b | 40.50 | a | 56.63 | 60.06 | 55.65 | 48.21 | b | 35.77 | 17.93 | 18.23 | 30.73 | ||||||||
1998 | 4.37 | a | 19.25 | 18.00 | a | 35.97 | 49.50 | a | 53.73 | 60.77 | 59.31 | b | 49.76 | a | 38.26 | 25.17 | 12.48 | 35.55 | ||||||||
1999 | -2.81 | 13.00 | 23.17 | a | 34.60 | 47.39 | 56.03 | 61.48 | 57.13 | 45.93 | a | 32.19 | 25.83 | a | 14.23 | a | 34.01 | |||||||||
2000 | 0.30 | a | 12.86 | 26.83 | b | 31.50 | 46.53 | a | 54.10 | 59.84 | 57.03 | 44.47 | 36.26 | 18.97 | a | -7.73 | a | 31.75 | ||||||||
2001 | 5.76 | b | -6.52 | a | 12.40 | a | 32.59 | a | 46.90 | 56.07 | a | 61.34 | b | 58.43 | a | 47.64 | b | 33.20 | a | 30.80 | 13.48 | 32.68 | ||||
2002 | 10.43 | a | 16.27 | b | 10.64 | c | 30.08 | f | 39.43 | a | 57.34 | a | 61.75 | c | 56.07 | b | 48.75 | b | 29.66 | b | 21.07 | b | 12.12 | g | 35.14 | b |
2003 | 1.43 | c | 0.76 | c | 13.07 | c | 32.39 | b | 43.43 | a | 54.40 | 58.71 | c | 58.55 | b | 42.86 | h | 34.22 | h | 17.33 | c | 14.57 | c | 29.47 | b | |
2004 | -2.29 | c | 6.93 | a | 23.85 | d | 30.21 | b | 41.61 | 51.73 | 57.37 | a | 50.77 | 50.07 | a | 37.03 | 25.17 | 11.85 | d | 32.03 | ||||||
2005 | 0.58 | e | 10.29 | 17.16 | 34.55 | a | 42.74 | 59.86 | b | 59.89 | c | 55.89 | c | 50.63 | 36.77 | 24.80 | e | 14.35 | h | 35.74 | a | |||||
2006 | 16.03 | a | 0.86 | 19.19 | 38.23 | 47.16 | 56.43 | 61.39 | 57.43 | a | 45.50 | b | 31.26 | 19.30 | 15.60 | a | 34.03 | |||||||||
2007 | 4.32 | -0.79 | 22.35 | 31.00 | 48.00 | 58.40 | 61.29 | 55.84 | 47.50 | 38.61 | 21.77 | 1.03 | 32.44 | |||||||||||||
2008 | -4.23 | a | -4.21 | a | 12.55 | b | 28.52 | a | 41.19 | 54.37 | 58.80 | a | 56.94 | 47.50 | 35.71 | 23.40 | -3.65 | 28.91 | ||||||||
2009 | -9.81 | 1.04 | 12.55 | 29.17 | 41.39 | 53.57 | 55.48 | 53.81 | 50.67 | 33.26 | 28.53 | 4.65 | 29.52 | |||||||||||||
2010 | -0.68 | -0.11 | 25.03 | 38.53 | 45.59 | b | 56.96 | c | 60.26 | 59.71 | 46.17 | 37.94 | 20.72 | a | 3.03 | 32.76 | ||||||||||
2011 | -5.45 | 1.21 | 9.43 | a | 33.30 | 43.61 | 55.80 | 64.65 | 58.90 | 46.63 | 38.81 | 21.63 | 15.39 | 31.99 | ||||||||||||
2012 | 8.74 | 11.41 | 26.84 | 35.17 | 47.45 | 56.33 | 64.32 | 54.81 | 42.57 | 32.84 | 22.10 | 7.10 | 34.14 | |||||||||||||
2013 | 2.26 | -0.25 | 5.97 | 22.53 | 43.77 | 56.00 | 60.23 | 57.45 | 51.57 | 35.94 | 18.70 | -1.68 | 29.37 | |||||||||||||
2014 | -5.81 | -4.39 | 13.58 | 27.53 | 44.94 | 56.87 | 57.65 | 58.58 | 47.57 | 36.42 | 13.33 | 13.61 | 29.99 | |||||||||||||
2015 | 8.16 | -4.93 | 21.39 | 31.80 | 41.93 | a | 57.23 | 59.26 | 56.17 | a | 51.43 | 37.81 | 26.83 | 16.84 | 33.66 | |||||||||||
2016 | 7.87 | 14.38 | 26.06 | 31.07 | 45.58 | 56.33 | 59.32 | 57.48 | 50.60 | 36.74 | 30.90 | 7.29 | 35.30 | |||||||||||||
2017 | 7.97 | 15.57 | 17.68 | 31.77 | 44.52 | 55.33 | 58.55 | 54.68 | 48.37 | 34.39 | 18.33 | 7.32 | 32.87 | |||||||||||||
2018 | 2.16 | -3.93 | 17.77 | 22.93 | 49.45 | 59.40 | 59.77 | 56.00 | 48.17 | 30.39 | 14.33 | 13.39 | 30.82 | |||||||||||||
2019 | -2.84 | -8.29 | 10.71 | 32.33 | 41.35 | 56.33 | 61.65 | 56.26 | 51.43 | 32.52 | 19.87 | 7.94 | 29.94 | |||||||||||||
2020 | 3.19 | 4.28 | 20.65 | 28.10 | 42.94 | 58.93 | 62.29 | 58.61 | 46.17 | 28.06 | 22.30 | 12.10 | 32.30 | |||||||||||||
2021 | 11.52 | -2.00 | 23.26 | 27.80 | 43.68 | 57.43 | 60.52 | 58.23 | 50.10 | 40.61 | 24.54 | b | 8.06 | 33.65 | ||||||||||||
2022 | -9.13 | -5.68 | 15.94 | 26.97 | 45.55 | 58.63 | 61.55 | 57.71 | 50.03 | 34.55 | b | ----- | z | 2.40 | a | 30.77 | a | |||||||||
2023 | 3.77 | 1.07 | 4.81 | 25.30 | 49.19 | 60.77 | 57.26 | 58.35 | 52.40 | 37.35 | 22.87 | 21.58 | 32.89 | |||||||||||||
2024 | 8.39 | 19.90 | 18.50 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.59 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.53 | 4.13 | 17.36 | 30.84 | 44.57 | 56.27 | 59.54 | 56.67 | 47.77 | 34.46 | 20.97 | 7.91 | 31.82 | |||||||||||||
S.D. | 7.18 | 8.21 | 5.87 | 3.75 | 2.81 | 2.28 | 2.42 | 2.25 | 2.79 | 3.28 | 4.97 | 7.08 | 1.96 | |||||||||||||
SKEW | -0.04 | 0.37 | -0.21 | -0.11 | 0.23 | -0.28 | -0.38 | -0.99 | -0.42 | -0.20 | -0.04 | -0.26 | -0.14 | |||||||||||||
MAX | 16.03 | 19.90 | 26.84 | 38.53 | 49.50 | 60.77 | 64.65 | 60.19 | 52.40 | 40.61 | 30.90 | 21.58 | 35.55 | |||||||||||||
MIN | -12.77 | -8.44 | 4.81 | 22.53 | 39.43 | 51.57 | 52.71 | 50.40 | 41.30 | 28.06 | 9.86 | -7.73 | 27.78 | |||||||||||||
YRS | 35 | 35 | 35 | 33 | 34 | 34 | 34 | 34 | 33 | 34 | 34 | 33 | 30 |