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 | 47.26 | 25.80 | 6.77 | 26.61 | i | |||
1990 | 22.45 | a | 18.87 | a | 31.66 | 43.70 | 54.52 | 66.52 | 68.23 | 67.58 | 61.33 | 43.03 | a | 33.05 | 12.58 | 43.63 | ||||||||||
1991 | 8.35 | 22.02 | 28.76 | 46.20 | 59.61 | 68.52 | 69.35 | 70.28 | a | 57.09 | a | 43.02 | 22.37 | 18.90 | 42.87 | |||||||||||
1992 | 19.74 | 24.36 | 33.18 | 39.23 | 58.44 | 62.67 | 62.68 | 62.68 | a | 56.33 | 44.52 | 26.03 | a | 11.15 | 41.75 | |||||||||||
1993 | 6.05 | 10.07 | a | 22.63 | 41.97 | 55.26 | 61.15 | 66.19 | 67.29 | 53.05 | 43.44 | 24.47 | 13.70 | c | 38.77 | |||||||||||
1994 | -3.29 | 2.31 | a | 28.60 | 44.13 | 59.07 | a | 67.13 | 67.21 | 65.27 | 60.97 | 48.65 | 33.62 | 19.85 | 41.13 | |||||||||||
1995 | 11.42 | 14.44 | a | 26.18 | 38.12 | a | 53.73 | a | 69.83 | 69.66 | 70.61 | 58.15 | 44.29 | 23.28 | 15.60 | b | 41.28 | |||||||||
1996 | 1.00 | a | 12.50 | 19.12 | a | 38.48 | a | 52.37 | 68.14 | a | 68.92 | a | 69.05 | b | 58.68 | 45.84 | 18.21 | a | 6.18 | 38.21 | ||||||
1997 | 2.10 | 13.13 | b | 23.21 | c | 38.59 | b | 52.30 | a | 68.48 | 70.23 | 67.15 | 61.75 | b | 48.35 | 25.28 | 25.31 | 41.32 | ||||||||
1998 | 11.58 | a | 26.48 | 25.41 | b | 47.73 | 61.43 | a | 63.40 | 71.71 | 71.19 | b | 64.31 | a | 48.35 | 31.87 | 22.08 | 45.46 | ||||||||
1999 | 6.58 | 22.71 | 31.83 | a | 44.80 | 58.65 | 66.13 | 72.61 | 68.52 | 56.98 | a | 44.76 | 38.52 | a | 25.03 | b | 44.76 | |||||||||
2000 | 11.08 | a | 21.95 | 37.00 | b | 42.85 | 58.42 | a | 64.78 | 70.97 | 69.65 | 58.60 | 48.44 | 26.81 | a | 2.16 | b | 42.72 | ||||||||
2001 | 16.24 | b | 5.00 | a | 22.30 | a | 42.26 | a | 58.38 | a | 66.40 | a | 72.66 | b | 71.55 | a | 59.29 | b | 45.37 | a | 41.48 | 21.00 | 43.49 | |||
2002 | 19.17 | a | 26.77 | b | 20.52 | c | 40.62 | f | 52.35 | a | 69.16 | a | 72.96 | c | 67.45 | b | 61.70 | b | 38.12 | b | 29.91 | b | 21.65 | g | 45.81 | b |
2003 | 11.14 | c | 11.16 | c | 26.25 | c | 45.59 | b | 55.18 | a | 65.40 | 71.23 | c | 71.84 | b | 56.59 | h | 47.17 | h | 25.50 | c | 22.54 | c | 40.58 | b | |
2004 | 7.36 | c | 16.12 | a | 33.57 | d | 45.84 | b | 53.37 | 62.60 | 68.62 | a | 62.77 | 61.69 | a | 47.34 | 34.95 | 19.50 | d | 42.81 | ||||||
2005 | 9.21 | e | 20.36 | 28.29 | 48.28 | a | 53.81 | 69.43 | b | 71.05 | c | 67.64 | c | 62.67 | 48.60 | 34.04 | e | 21.13 | h | 46.67 | a | |||||
2006 | 23.68 | a | 11.66 | 27.13 | 49.20 | 57.76 | 67.73 | 74.47 | 69.42 | a | 56.30 | b | 43.15 | 31.13 | 25.60 | a | 44.77 | |||||||||
2007 | 13.74 | 8.09 | 31.37 | 40.80 | 59.56 | 68.60 | 72.79 | 66.35 | 59.93 | 49.40 | 31.42 | 10.45 | 42.71 | |||||||||||||
2008 | 6.03 | a | 6.84 | a | 22.84 | b | 39.36 | a | 53.76 | 64.33 | 70.90 | a | 69.11 | 59.82 | 46.52 | 32.09 | a | 6.53 | 39.84 | |||||||
2009 | 1.79 | 11.54 | 21.63 | 39.47 | 54.55 | 64.07 | 66.50 | 65.47 | 62.65 | 39.82 | 37.95 | 11.29 | 39.73 | |||||||||||||
2010 | 7.26 | 9.14 | 32.48 | 50.50 | 55.53 | b | 66.76 | c | 71.63 | 71.13 | 56.30 | 49.79 | 29.78 | a | 10.53 | 42.57 | ||||||||||
2011 | 3.58 | 10.89 | 18.45 | a | 41.70 | 53.61 | 65.10 | 74.71 | 69.68 | 59.15 | 50.71 | 32.82 | 24.27 | 42.06 | ||||||||||||
2012 | 19.11 | 21.69 | 39.02 | 46.92 | 59.58 | 68.35 | 75.40 | 67.10 | 58.52 | 43.56 | 31.25 | 14.69 | 45.43 | |||||||||||||
2013 | 12.27 | 9.29 | 16.16 | 30.98 | 54.73 | 65.97 | 70.81 | 69.63 | 63.47 | 44.81 | 28.40 | 7.05 | 39.46 | |||||||||||||
2014 | 5.73 | 6.12 | 23.69 | 38.72 | 56.16 | 66.37 | 67.92 | 68.18 | 59.55 | 48.08 | 21.85 | 20.10 | 40.21 | |||||||||||||
2015 | 16.68 | 6.11 | 31.76 | 46.25 | 54.13 | a | 67.38 | 70.50 | 68.05 | a | 64.27 | 49.52 | 37.07 | 23.03 | 44.56 | |||||||||||
2016 | 15.44 | 22.90 | 37.11 | 43.38 | 58.73 | 68.32 | 70.11 | 68.92 | 61.57 | 47.48 | 40.68 | 15.00 | 45.80 | |||||||||||||
2017 | 14.53 | 25.46 | 28.18 | 44.38 | 56.50 | 67.40 | 70.89 | 65.27 | 60.55 | 46.77 | 27.97 | 16.55 | 43.70 | |||||||||||||
2018 | 11.16 | 7.46 | 26.45 | 33.28 | 63.18 | 69.88 | 69.95 | 66.81 | 59.85 | 39.95 | 22.37 | 21.27 | 40.97 | |||||||||||||
2019 | 6.13 | 0.07 | 19.63 | 41.92 | 51.52 | 66.68 | 71.24 | 66.16 | 61.05 | 40.92 | 27.60 | 15.98 | 39.08 | |||||||||||||
2020 | 11.53 | 14.66 | 30.42 | 39.30 | 53.68 | 70.10 | 72.50 | 69.81 | 57.88 | 38.90 | 34.22 | 22.16 | 42.93 | |||||||||||||
2021 | 19.58 | 6.64 | 35.61 | 40.30 | 56.27 | 71.20 | 72.05 | 69.90 | 62.88 | 51.10 | 33.48 | b | 17.35 | 44.70 | ||||||||||||
2022 | 3.34 | 7.16 | 25.35 | 35.25 | 55.60 | 69.43 | 72.10 | 68.44 | 63.02 | 47.47 | b | ----- | z | 9.83 | a | 41.54 | a | |||||||||
2023 | 11.82 | 12.48 | 15.53 | 33.87 | 61.95 | 72.10 | 68.60 | 69.15 | 63.67 | 47.42 | 33.53 | 29.18 | 43.27 | |||||||||||||
2024 | 14.68 | 28.79 | 31.19 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.89 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.81 | 14.15 | 27.22 | 41.92 | 56.28 | 67.04 | 70.51 | 68.21 | 60.09 | 45.73 | 30.26 | 16.46 | 42.33 | |||||||||||||
S.D. | 6.48 | 7.76 | 6.08 | 4.67 | 3.02 | 2.55 | 2.60 | 2.25 | 2.69 | 3.44 | 5.65 | 6.79 | 2.14 | |||||||||||||
SKEW | 0.03 | 0.27 | -0.04 | -0.34 | 0.45 | -0.32 | -0.69 | -0.65 | -0.43 | -0.58 | -0.01 | -0.20 | -0.22 | |||||||||||||
MAX | 23.68 | 28.79 | 39.02 | 50.50 | 63.18 | 72.10 | 75.40 | 71.84 | 64.31 | 51.10 | 41.48 | 29.18 | 45.80 | |||||||||||||
MIN | -3.29 | 0.07 | 15.53 | 30.98 | 51.52 | 61.15 | 62.68 | 62.68 | 53.05 | 38.12 | 18.21 | 2.16 | 38.21 | |||||||||||||
YRS | 35 | 35 | 35 | 33 | 34 | 34 | 34 | 34 | 33 | 34 | 34 | 33 | 30 |