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 | ----- | 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 | 22.70 | a | 31.10 | b | 31.53 | a | 45.57 | a | 61.09 | c | 64.78 | 68.76 | 68.78 | a | 62.78 | a | 49.44 | 38.72 | 25.80 | c | 47.59 | |||||
1999 | 13.98 | 27.89 | 33.59 | b | 45.90 | a | 57.75 | a | 66.47 | 72.74 | 64.53 | 57.50 | 45.53 | 39.95 | a | 24.63 | 45.87 | |||||||||
2000 | 16.13 | a | 25.55 | a | 39.18 | 42.59 | a | 57.65 | 65.14 | a | 67.40 | 67.66 | 58.28 | 51.37 | a | 33.50 | a | 11.37 | 44.65 | |||||||
2001 | 20.68 | 17.41 | 29.53 | a | 49.12 | a | 57.50 | 66.10 | 71.06 | f | 69.95 | 57.15 | 47.17 | a | 42.88 | 28.81 | 44.21 | a | ||||||||
2002 | 24.98 | a | 27.00 | c | 26.85 | 44.78 | 51.13 | 67.28 | a | 73.55 | 68.23 | 63.15 | 43.03 | 32.65 | 25.66 | 45.69 | ||||||||||
2003 | 14.23 | a | 13.69 | a | 30.35 | a | 40.82 | b | 52.90 | a | 63.58 | 69.11 | 69.34 | 59.30 | 46.44 | 35.27 | 26.92 | 43.50 | ||||||||
2004 | 10.90 | 22.37 | c | 34.82 | 44.55 | 53.69 | 63.23 | 66.65 | 62.28 | a | 63.38 | 48.47 | 37.90 | 22.52 | 44.23 | |||||||||||
2005 | 15.92 | 25.05 | 27.34 | 46.67 | 52.92 | 70.12 | 70.16 | 68.87 | 63.35 | 50.66 | 35.33 | 18.52 | 45.41 | |||||||||||||
2006 | 29.45 | 18.64 | 31.29 | 48.33 | 56.44 | 63.92 | 71.87 | 67.88 | a | 57.30 | 44.00 | 38.95 | 28.47 | 46.38 | ||||||||||||
2007 | 22.61 | 12.68 | 34.21 | 42.75 | 58.79 | 67.03 | 67.10 | 67.88 | a | 61.57 | 53.42 | 33.40 | 19.11 | 45.05 | ||||||||||||
2008 | 16.87 | 13.02 | 25.42 | 44.40 | 52.10 | 64.88 | b | 69.29 | 66.03 | 61.50 | 47.42 | 34.43 | 15.06 | 42.53 | ||||||||||||
2009 | 7.95 | 21.38 | 29.06 | 42.62 | 56.05 | 64.05 | 64.29 | 65.50 | 60.50 | 43.69 | 40.93 | 20.61 | 43.05 | |||||||||||||
2010 | 17.74 | 20.91 | 35.40 | 49.23 | 58.17 | a | 65.93 | 72.08 | 71.40 | 58.13 | 49.53 | 36.43 | 18.60 | 46.13 | ||||||||||||
2011 | 13.84 | 18.98 | 27.98 | 40.92 | 52.50 | 62.87 | 72.87 | 67.66 | 56.63 | 49.84 | 37.42 | 28.10 | 44.13 | |||||||||||||
2012 | 21.98 | 26.79 | 44.73 | 44.23 | 60.24 | 68.43 | 74.68 | 67.77 | 58.08 | 46.65 | 36.37 | 29.02 | 48.25 | |||||||||||||
2013 | 18.79 | 17.48 | 24.45 | 39.70 | 56.37 | 64.48 | 69.23 | 67.48 | 59.83 | 48.31 | 33.45 | 15.11 | 42.89 | |||||||||||||
2014 | 7.87 | 9.39 | 22.10 | 41.03 | 55.77 | a | 67.05 | 66.53 | 67.23 | 59.17 | 47.65 | a | 28.53 | 26.05 | 41.53 | |||||||||||
2015 | 17.06 | 8.43 | 30.85 | 44.12 | 57.15 | 63.53 | 68.70 | a | 67.03 | 65.18 | 49.50 | 40.88 | 34.42 | 45.57 | ||||||||||||
2016 | 17.73 | 23.90 | 36.37 | 41.98 | 55.94 | 66.13 | 71.32 | 70.45 | 64.22 | 51.97 | 41.85 | 22.48 | 47.03 | |||||||||||||
2017 | 21.31 | 28.57 | 30.16 | 47.78 | 54.48 | 68.67 | 70.74 | 65.87 | 63.10 | 52.97 | 34.67 | 20.11 | 46.54 | |||||||||||||
2018 | 18.77 | 19.80 | 30.90 | 34.65 | 62.18 | 66.95 | 71.13 | 69.71 | 62.27 | 45.52 | 29.62 | 27.89 | 44.95 | |||||||||||||
2019 | 14.82 | 16.20 | 26.11 | 43.08 | 54.52 | 67.43 | 74.60 | 66.40 | 63.15 | 46.71 | 29.80 | 26.48 | 44.11 | |||||||||||||
2020 | 24.29 | 19.38 | 34.69 | 40.85 | 54.50 | 66.87 | 73.27 | 69.15 | 59.27 | 43.05 | 41.07 | 26.52 | 46.07 | |||||||||||||
2021 | 21.39 | 12.98 | 36.85 | 45.75 | 55.79 | 69.45 | 69.24 | 70.40 | 61.50 | 54.65 | 35.03 | 28.10 | 46.76 | |||||||||||||
2022 | 12.44 | 18.23 | 30.61 | 39.93 | 57.45 | 65.95 | 69.60 | 67.92 | 60.62 | 47.81 | 37.50 | 22.85 | 44.24 | |||||||||||||
2023 | 25.97 | 22.89 | 29.68 | 46.33 | 55.66 | 64.98 | 69.63 | 67.52 | 63.28 | 50.92 | 35.22 | 33.24 | 47.11 | |||||||||||||
2024 | 22.56 | 30.74 | 36.28 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.86 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.26 | 20.39 | 31.49 | 43.76 | 56.10 | 65.97 | 70.18 | 67.81 | 60.78 | 48.30 | 36.22 | 24.09 | 45.17 | |||||||||||||
S.D. | 5.35 | 6.28 | 4.92 | 3.34 | 2.75 | 1.94 | 2.66 | 1.98 | 2.51 | 3.18 | 3.83 | 5.57 | 1.68 | |||||||||||||
SKEW | -0.09 | -0.09 | 0.49 | -0.47 | 0.27 | 0.31 | -0.14 | -0.65 | -0.08 | 0.11 | -0.17 | -0.40 | -0.26 | |||||||||||||
MAX | 29.45 | 31.10 | 44.73 | 49.23 | 62.18 | 70.12 | 74.68 | 71.40 | 65.18 | 54.65 | 42.88 | 34.42 | 48.25 | |||||||||||||
MIN | 7.87 | 8.43 | 22.10 | 34.65 | 51.13 | 62.87 | 64.29 | 62.28 | 56.63 | 43.03 | 28.53 | 11.37 | 41.53 | |||||||||||||
YRS | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |