YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 39.65 | g | 49.32 | 60.30 | 65.13 | 64.55 | 56.43 | 43.19 | 32.41 | a | 30.61 | 50.24 | d | |||||||
1962 | 22.55 | 32.39 | 30.03 | 43.47 | 49.35 | 57.10 | 63.32 | 62.48 | 58.60 | 45.32 | 35.33 | 29.77 | 44.14 | |||||||||||||
1963 | 22.97 | 29.50 | 32.74 | 40.93 | 50.68 | 55.27 | 67.71 | 64.00 | 60.03 | 47.87 | 35.47 | 22.39 | 44.13 | |||||||||||||
1964 | 18.39 | 19.10 | 31.65 | 40.50 | 50.23 | 58.07 | 66.42 | 64.94 | 58.23 | 45.65 | 31.67 | 28.29 | 42.76 | |||||||||||||
1965 | 29.74 | 27.07 | 32.42 | 40.73 | 49.19 | 55.97 | 66.42 | 63.19 | 55.67 | 41.35 | 38.03 | 29.77 | 44.13 | |||||||||||||
1966 | 22.68 | 24.11 | 33.81 | 42.97 | 51.90 | 59.30 | 66.55 | 63.58 | 57.13 | 42.39 | 35.57 | 24.29 | 43.69 | |||||||||||||
1967 | 20.77 | 29.25 | 36.61 | 42.27 | 47.29 | 58.97 | 66.77 | 63.16 | 57.13 | 43.23 | 35.27 | 26.03 | 43.90 | |||||||||||||
1968 | 26.16 | 33.28 | 35.58 | 39.00 | 48.23 | 58.80 | 62.94 | 60.19 | 52.50 | 42.58 | 33.10 | 21.03 | 42.78 | |||||||||||||
1969 | 28.81 | 28.18 | 28.65 | 42.17 | 49.58 | 57.63 | 67.19 | 67.97 | 57.97 | 45.74 | 32.90 | 28.48 | 44.61 | |||||||||||||
1970 | 23.65 | 30.50 | 33.32 | 36.50 | 49.81 | 59.27 | 66.13 | 64.23 | 57.03 | 39.97 | 31.97 | 27.42 | 43.32 | |||||||||||||
1971 | 24.71 | 27.75 | 33.94 | 39.57 | 48.03 | 58.27 | 64.97 | 60.90 | 53.70 | 43.61 | 34.13 | 28.29 | 43.16 | |||||||||||||
1972 | 26.52 | 28.97 | 40.06 | 39.70 | 47.90 | 59.50 | 64.87 | 62.52 | 56.17 | 49.81 | 30.10 | 26.26 | 44.36 | |||||||||||||
1973 | 25.35 | 30.68 | 32.68 | 36.07 | 49.19 | 57.90 | 64.52 | 62.94 | 56.20 | 42.58 | 32.07 | 24.26 | 42.87 | |||||||||||||
1974 | 26.74 | 24.75 | 37.39 | 41.77 | 52.10 | 62.73 | 64.26 | 60.74 | 55.30 | 48.16 | 33.60 | 25.52 | 44.42 | |||||||||||||
1975 | 25.84 | 27.79 | 34.00 | 35.83 | 45.48 | 58.07 | 63.55 | 63.81 | 56.43 | 44.65 | 32.90 | 28.13 | 43.04 | |||||||||||||
1976 | 25.65 | 34.28 | 36.32 | 43.27 | 52.32 | 61.20 | 64.52 | 63.65 | 57.23 | 42.42 | 29.47 | 23.48 | 44.48 | |||||||||||||
1977 | 28.10 | 28.89 | 32.06 | 41.67 | 46.42 | 59.83 | 65.29 | 66.87 | 58.90 | 47.35 | 33.73 | 29.61 | 44.89 | |||||||||||||
1978 | 28.23 | 29.43 | 38.06 | 42.23 | 51.19 | 62.77 | 67.52 | 62.77 | 56.73 | 46.19 | 38.03 | 24.58 | 45.65 | |||||||||||||
1979 | 26.23 | 28.89 | 32.29 | 39.53 | 47.84 | 56.53 | 65.90 | 59.68 | 56.13 | 43.97 | 29.57 | 25.68 | 42.69 | |||||||||||||
1980 | 30.06 | 32.76 | 34.48 | 40.47 | 47.90 | 60.50 | 67.13 | 62.81 | 57.27 | 41.68 | 30.03 | 27.94 | 44.42 | |||||||||||||
1981 | 30.55 | 30.21 | 34.48 | 45.37 | 52.06 | 61.10 | 66.45 | 62.03 | 57.20 | 45.26 | ----- | z | ----- | z | 48.47 | b | ||||||||||
1982 | ----- | z | ----- | z | 35.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.77 | k | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.39 | 58.33 | 46.58 | 29.76 | a | 26.39 | 45.29 | g | ||||
2001 | 26.42 | 29.11 | 35.32 | 41.57 | 53.03 | 62.10 | 67.58 | 64.45 | 58.77 | 47.45 | 37.20 | 23.16 | 45.51 | |||||||||||||
2002 | 25.45 | 30.11 | 33.06 | 47.30 | 49.48 | 64.00 | 66.48 | 64.52 | 59.30 | 45.97 | 33.93 | 28.77 | 45.70 | |||||||||||||
2003 | 29.42 | 33.29 | 36.06 | 41.33 | 51.26 | 60.20 | 67.87 | 67.61 | 60.97 | 50.48 | 36.28 | e | 25.58 | 46.70 | ||||||||||||
2004 | 31.13 | 27.31 | 41.74 | 45.53 | 52.39 | 58.97 | 65.03 | 62.45 | 56.00 | 47.03 | 35.10 | 27.29 | 45.83 | |||||||||||||
2005 | 31.94 | 36.86 | 35.68 | 41.27 | 52.10 | 60.17 | a | 67.23 | 65.74 | 60.73 | 47.81 | 33.77 | 27.97 | 46.77 | ||||||||||||
2006 | 26.97 | 32.36 | 37.68 | 45.10 | 54.84 | 64.90 | 68.84 | 65.00 | 54.90 | 44.81 | 34.07 | 24.61 | 46.17 | |||||||||||||
2007 | 27.94 | 30.32 | 36.06 | 41.47 | 53.77 | 60.90 | 67.03 | 67.26 | 59.23 | 46.48 | 37.70 | 25.97 | 46.18 | |||||||||||||
2008 | 26.94 | 29.56 | b | 33.74 | 40.37 | 50.35 | 61.80 | 65.19 | 63.42 | 54.93 | 42.87 | 32.10 | 27.23 | 44.04 | ||||||||||||
2009 | 25.65 | 28.64 | 36.03 | 41.23 | 54.77 | a | 60.43 | 68.19 | 65.32 | 56.80 | 45.97 | 35.27 | 27.84 | 45.51 | ||||||||||||
2010 | 26.20 | a | 30.18 | 33.23 | 41.77 | 46.13 | 60.57 | b | 66.84 | 64.32 | 59.03 | 47.45 | 29.36 | b | 27.68 | 44.40 | ||||||||||
2011 | 22.55 | 22.64 | 36.84 | 44.97 | 47.61 | 59.73 | 69.06 | 67.90 | 60.03 | 44.48 | 34.30 | 26.68 | 44.73 | |||||||||||||
2012 | 27.77 | 30.14 | a | 33.84 | 44.07 | 50.87 | 61.37 | 65.86 | b | 66.68 | 57.10 | 45.48 | 36.38 | a | 28.03 | 45.63 | ||||||||||
2013 | 22.74 | 25.61 | 36.77 | 43.83 | 51.32 | 63.73 | 66.70 | a | 65.61 | 59.73 | 42.10 | 35.20 | 26.35 | 44.98 | ||||||||||||
2014 | 25.87 | 33.25 | 37.20 | a | 43.23 | 50.61 | 62.90 | 68.00 | 64.39 | 61.83 | 48.13 | 33.57 | 31.29 | 46.69 | ||||||||||||
2015 | 28.74 | 33.86 | 40.52 | 41.60 | 48.42 | 63.60 | 67.65 | 67.35 | 61.41 | a | 51.00 | a | 35.40 | 27.03 | 47.22 | |||||||||||
2016 | 26.10 | 29.62 | 37.06 | 43.50 | 50.35 | 65.17 | a | 69.23 | 64.23 | 58.59 | a | 49.55 | 38.63 | 32.32 | 47.03 | |||||||||||
2017 | 31.39 | 35.32 | 40.68 | 43.23 | 51.06 | 62.43 | 67.58 | 64.19 | 58.14 | a | 47.94 | 39.63 | 28.84 | 47.54 | ||||||||||||
2018 | 26.13 | 33.68 | 37.84 | 47.23 | 52.94 | 63.17 | 67.84 | 66.19 | 59.93 | 49.00 | 32.23 | 30.97 | 47.26 | |||||||||||||
2019 | 27.65 | 29.79 | 38.06 | 44.17 | 48.90 | 59.66 | a | 68.23 | 68.65 | 61.33 | 45.03 | 36.53 | 30.42 | 46.53 | ||||||||||||
2020 | 27.18 | c | 31.52 | 39.42 | 42.87 | 53.19 | 60.73 | 68.47 | a | 68.00 | d | 55.42 | d | 43.19 | 36.27 | 23.45 | 45.81 | |||||||||
2021 | 24.71 | 27.93 | 33.71 | 45.83 | 51.97 | 64.53 | 66.84 | 66.16 | 60.53 | 45.94 | 36.53 | 31.19 | 46.32 | |||||||||||||
2022 | 26.68 | 25.00 | 33.10 | 45.03 | 52.26 | 65.73 | 69.58 | 66.48 | 59.83 | 46.81 | 31.60 | 30.74 | 46.07 | |||||||||||||
2023 | 27.65 | 29.61 | 36.45 | 42.40 | 52.84 | 59.63 | 71.19 | 68.74 | 61.93 | 50.19 | 38.97 | 28.97 | 47.38 | |||||||||||||
2024 | 30.19 | 34.07 | 38.93 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.40 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.52 | 29.72 | 35.45 | 42.16 | 50.38 | 60.58 | 66.68 | 64.60 | 57.93 | 45.66 | 34.21 | 27.29 | 45.08 | |||||||||||||
S.D. | 2.86 | 3.44 | 2.85 | 2.61 | 2.28 | 2.51 | 1.74 | 2.25 | 2.21 | 2.67 | 2.72 | 2.60 | 1.43 | |||||||||||||
SKEW | -0.43 | -0.59 | 0.06 | -0.38 | -0.12 | 0.10 | -0.02 | -0.06 | -0.11 | 0.03 | -0.04 | -0.25 | -0.02 | |||||||||||||
MAX | 31.94 | 36.86 | 41.74 | 47.30 | 54.84 | 65.73 | 71.19 | 68.74 | 61.93 | 51.00 | 39.63 | 32.32 | 47.54 | |||||||||||||
MIN | 18.39 | 19.10 | 28.65 | 35.83 | 45.48 | 55.27 | 62.94 | 59.68 | 52.50 | 39.97 | 29.36 | 21.03 | 42.69 | |||||||||||||
YRS | 44 | 44 | 45 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 44 | 44 | 42 |