YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 30.92 | r | 25.55 | 25.55 | k | |
1962 | 18.34 | b | 29.68 | 31.03 | 42.60 | 54.81 | 58.93 | 64.42 | 61.39 | 56.70 | 46.16 | 35.67 | 26.74 | 43.87 | ||||||||||||
1963 | 12.77 | 26.54 | 33.52 | 46.63 | 53.16 | 60.10 | 63.58 | 64.00 | 62.23 | q | 48.71 | 36.62 | d | 21.29 | 42.45 | a | ||||||||||
1964 | 23.77 | ----- | z | 30.00 | g | ----- | z | ----- | z | ----- | z | 65.42 | ----- | z | ----- | z | 42.69 | b | 34.27 | 23.87 | 38.00 | g | ||||
1965 | 24.41 | b | 21.32 | c | 23.77 | a | 42.83 | a | 53.52 | 58.90 | ----- | z | 60.35 | ----- | z | 42.65 | ----- | z | 28.03 | 39.53 | c | |||||
1966 | ----- | z | ----- | z | 32.87 | ----- | z | ----- | z | 61.23 | 67.70 | a | 61.65 | 56.23 | 40.00 | 34.13 | 19.74 | 46.69 | d | |||||||
1967 | 20.00 | b | 22.64 | 35.58 | 46.53 | 46.19 | 61.97 | 63.97 | 61.03 | 54.47 | 43.00 | 32.67 | 22.55 | 42.55 | ||||||||||||
1968 | 25.00 | 23.41 | 32.90 | 39.80 | 49.26 | 59.20 | 63.68 | 62.58 | 51.90 | 44.81 | 32.03 | 20.58 | 42.10 | |||||||||||||
1969 | 23.53 | a | 25.86 | 25.10 | 42.83 | 51.35 | 57.37 | 66.68 | 64.87 | 57.23 | 42.71 | 30.30 | 25.23 | 42.75 | ||||||||||||
1970 | 19.10 | 25.61 | 28.84 | 39.73 | 51.00 | 58.77 | 64.06 | 62.55 | 56.07 | 39.35 | 28.77 | 26.10 | a | 41.66 | ||||||||||||
1971 | 20.23 | 21.89 | 27.23 | 40.73 | 48.94 | 61.37 | 63.58 | 60.29 | 55.13 | 45.65 | 33.10 | 27.29 | 42.12 | |||||||||||||
1972 | 19.32 | 23.21 | 33.39 | 44.07 | 50.77 | 60.13 | 61.94 | 60.94 | 55.97 | 43.94 | 27.50 | 20.52 | 41.81 | |||||||||||||
1973 | 20.13 | 23.79 | 34.42 | 36.33 | 47.52 | 57.83 | 63.13 | 61.03 | 54.59 | a | 45.61 | 33.93 | 21.27 | a | 41.63 | |||||||||||
1974 | 19.35 | 22.82 | 36.33 | a | 41.53 | 53.55 | 58.23 | 63.97 | 60.35 | 50.27 | 46.10 | 32.60 | 23.13 | 42.35 | ||||||||||||
1975 | 22.57 | a | 22.54 | 27.74 | 37.83 | 47.87 | 59.17 | 62.68 | 61.19 | 51.23 | 40.58 | 30.93 | 25.19 | 40.79 | ||||||||||||
1976 | 19.52 | 29.38 | 30.45 | 43.60 | 46.19 | 58.13 | 61.06 | 60.97 | 55.37 | 36.19 | 25.97 | 19.58 | 40.53 | |||||||||||||
1977 | 14.06 | 26.64 | 28.90 | b | 43.48 | a | 55.40 | a | 61.97 | 65.39 | 64.61 | 58.48 | a | 44.42 | 31.50 | 23.97 | 43.24 | |||||||||
1978 | 16.35 | 20.07 | 30.23 | 44.07 | 50.39 | 62.03 | 64.58 | 61.42 | 57.90 | 45.07 | b | 36.30 | 21.94 | 42.53 | ||||||||||||
1979 | 17.29 | 22.89 | 34.35 | 41.50 | 50.00 | 58.90 | 64.48 | 59.97 | 53.73 | 42.39 | 26.43 | 23.42 | 41.28 | |||||||||||||
1980 | 21.61 | 22.71 | a | 29.00 | 37.67 | 50.77 | 65.07 | 67.55 | 65.48 | 57.63 | 40.10 | 27.17 | 25.48 | 42.52 | ||||||||||||
1981 | 21.55 | 24.79 | 34.97 | 46.20 | 51.10 | 63.23 | 67.10 | 63.55 | 57.40 | 46.48 | 36.97 | 26.71 | 45.00 | |||||||||||||
1982 | 21.20 | a | 22.68 | 32.97 | 40.87 | 52.13 | 58.10 | 66.52 | 65.35 | 57.53 | 42.58 | 32.43 | 26.90 | 43.27 | ||||||||||||
1983 | 22.42 | 27.43 | 31.74 | 36.50 | 46.23 | 55.97 | 65.20 | a | 64.61 | 57.30 | 48.39 | 35.83 | 14.71 | 42.19 | ||||||||||||
1984 | 19.74 | 22.69 | 31.00 | 37.50 | 50.84 | 62.60 | 64.00 | 63.58 | 53.37 | 42.77 | 33.80 | 28.90 | 42.57 | |||||||||||||
1985 | 19.81 | 24.39 | 34.97 | 43.43 | 53.97 | 60.73 | 63.55 | 65.81 | 57.27 | 46.23 | 31.57 | 20.77 | 43.54 | |||||||||||||
1986 | 24.97 | 29.46 | 35.97 | 45.50 | 51.71 | 61.40 | 65.74 | 64.03 | 58.50 | 45.90 | 30.97 | 27.32 | 45.12 | |||||||||||||
1987 | 22.29 | 30.82 | 30.19 | 38.43 | 53.00 | 60.72 | a | 64.77 | 63.42 | 55.53 | 43.94 | 32.63 | 22.23 | 43.17 | ||||||||||||
1988 | 20.35 | 22.72 | 28.94 | 38.27 | 51.39 | 60.80 | 64.19 | 63.55 | 54.90 | 43.90 | 31.00 | 23.26 | 41.94 | |||||||||||||
1989 | 24.03 | 22.25 | 32.29 | 43.27 | 53.80 | a | 59.03 | 63.32 | 63.00 | 52.87 | 44.55 | 29.07 | 15.35 | 41.90 | ||||||||||||
1990 | 22.42 | 25.61 | 34.00 | 42.47 | 48.90 | 64.90 | 63.45 | 62.65 | 58.37 | 42.06 | 35.50 | 19.29 | 43.30 | |||||||||||||
1991 | 22.26 | 28.43 | 34.57 | a | 42.23 | 54.00 | 62.36 | b | 63.68 | 63.23 | 56.03 | 44.30 | a | 29.40 | 28.29 | 44.06 | ||||||||||
1992 | 25.33 | a | 31.38 | 34.58 | 44.20 | 51.84 | 59.13 | 64.29 | 61.42 | 56.90 | 43.71 | 29.90 | 23.90 | 43.88 | ||||||||||||
1993 | 23.13 | 22.63 | a | 31.42 | 39.47 | 50.42 | 60.57 | 67.33 | a | 62.87 | 54.00 | 40.32 | 26.97 | 25.06 | 42.02 | |||||||||||
1994 | 22.16 | 20.21 | 34.26 | 39.43 | 52.19 | 63.83 | 64.52 | 62.79 | b | 56.00 | 45.58 | 33.40 | 27.20 | a | 43.47 | |||||||||||
1995 | 24.29 | 28.59 | a | 33.74 | 39.33 | 50.03 | 58.24 | a | 63.84 | 65.03 | 57.18 | b | 41.77 | 33.41 | a | 25.52 | b | 43.42 | ||||||||
1996 | 19.48 | 25.83 | 26.03 | 39.93 | 57.57 | a | 61.63 | 65.52 | 64.58 | 54.97 | 43.87 | 31.73 | 22.43 | a | 42.80 | |||||||||||
1997 | 23.00 | 28.14 | 32.67 | a | 36.93 | 50.61 | 58.97 | a | 65.43 | a | 64.13 | a | 58.43 | 43.45 | 30.47 | 24.17 | a | 43.03 | ||||||||
1998 | 26.10 | b | 30.39 | 29.97 | a | 38.38 | d | 54.48 | b | 61.03 | a | 67.83 | a | 63.60 | a | 61.10 | a | 45.97 | 33.00 | 20.71 | c | 44.38 | ||||
1999 | 21.74 | 26.75 | 29.77 | 38.07 | a | 47.74 | d | 61.07 | 66.07 | b | 66.16 | 56.07 | 42.23 | 36.07 | 24.69 | b | 43.04 | |||||||||
2000 | 24.42 | 29.18 | a | 34.97 | 42.73 | 55.29 | 61.65 | d | 66.35 | 64.65 | 56.37 | 49.06 | 30.00 | d | 21.00 | 44.64 | ||||||||||
2001 | 24.55 | 28.04 | 34.94 | 45.11 | c | 52.65 | 62.96 | d | 68.56 | d | 64.79 | c | 55.10 | 43.61 | 38.43 | 26.16 | 45.41 | |||||||||
2002 | 24.03 | 23.25 | 25.47 | a | 44.55 | a | 50.31 | b | 63.14 | a | 64.50 | c | 65.11 | c | 56.23 | 45.39 | 32.00 | c | 26.29 | 43.36 | ||||||
2003 | 23.74 | 23.54 | 32.45 | 43.65 | d | 52.03 | 59.00 | 65.13 | 65.57 | c | 53.77 | 47.42 | 34.70 | 24.80 | a | 43.82 | ||||||||||
2004 | 25.23 | a | 25.52 | 40.32 | 43.13 | 53.74 | 60.87 | 64.10 | 62.13 | 56.36 | b | 47.23 | 35.27 | 23.71 | 44.80 | |||||||||||
2005 | 27.45 | 30.93 | 31.35 | 37.47 | k | 52.65 | 61.23 | 64.81 | d | 63.23 | 58.97 | a | 45.30 | a | 30.24 | a | 22.68 | 44.44 | a | |||||||
2006 | 24.42 | 23.50 | 35.45 | 44.97 | 54.03 | 61.31 | a | 65.87 | 64.45 | b | 53.53 | 45.16 | 32.60 | 24.97 | 44.19 | |||||||||||
2007 | 21.90 | 24.71 | 38.48 | 38.47 | 52.94 | 59.68 | b | 61.93 | d | 65.00 | c | 58.63 | 44.97 | 32.72 | e | 24.90 | 43.69 | |||||||||
2008 | 20.50 | a | 24.45 | 31.65 | 38.67 | 52.29 | c | 61.82 | b | 64.37 | d | 62.77 | 53.57 | 44.52 | 32.86 | a | 23.27 | a | 42.56 | |||||||
2009 | 20.58 | 28.14 | 34.06 | 39.77 | 51.19 | 61.43 | 64.34 | b | 62.88 | f | 53.67 | 40.81 | 33.93 | a | 19.74 | 40.70 | a | |||||||||
2010 | 21.23 | 23.75 | 32.03 | 43.63 | 52.58 | 66.57 | 66.06 | 65.39 | 59.07 | 45.52 | 31.80 | 26.97 | 44.55 | |||||||||||||
2011 | 18.97 | 20.82 | 34.65 | 42.90 | 50.48 | 67.53 | 70.70 | a | 70.81 | 55.63 | 45.26 | 33.30 | 26.61 | 44.81 | ||||||||||||
2012 | 25.55 | 27.34 | 40.48 | 47.63 | 57.23 | 63.87 | 67.84 | 64.87 | 56.57 | 42.97 | 35.73 | 25.29 | 46.28 | |||||||||||||
2013 | 24.29 | 25.04 | 32.52 | 36.43 | 52.03 | 63.80 | 64.97 | 64.50 | a | 59.77 | 43.81 | 31.70 | 21.87 | 43.39 | ||||||||||||
2014 | 18.71 | 22.89 | 28.03 | 40.90 | 51.68 | 62.93 | a | 64.42 | 64.65 | 59.70 | 45.61 | 30.40 | 29.23 | 43.26 | ||||||||||||
2015 | 23.32 | 26.39 | 34.03 | 44.23 | 51.19 | 63.97 | 67.39 | 64.32 | 61.33 | 49.77 | 35.10 | 28.84 | 45.82 | |||||||||||||
2016 | 25.19 | 29.03 | 37.81 | 44.43 | 50.39 | 63.33 | 67.97 | 64.61 | 59.70 | 48.58 | 39.40 | 24.26 | 46.23 | |||||||||||||
2017 | 25.81 | 31.43 | 37.65 | 45.03 | 50.13 | 62.97 | 65.74 | 63.19 | 57.63 | 45.32 | 37.30 | 24.32 | 45.54 | |||||||||||||
2018 | 18.61 | 24.71 | 35.65 | 38.67 | 59.90 | 65.27 | 67.13 | 66.71 | 58.93 | 46.39 | 31.10 | 25.52 | 44.88 | |||||||||||||
2019 | 24.19 | 24.57 | 31.81 | 43.73 | 52.13 | 61.00 | 65.90 | 67.81 | 63.87 | 39.77 | 30.37 | 27.13 | 44.36 | |||||||||||||
2020 | 25.81 | 23.55 | 38.81 | 40.87 | 52.61 | 63.37 | 68.74 | 66.06 | 53.40 | 41.10 | 37.53 | 25.68 | 44.79 | |||||||||||||
2021 | 25.19 | 19.00 | 35.23 | 41.80 | 53.00 | 64.23 | 66.19 | 66.42 | 59.87 | 46.87 | 34.63 | 32.03 | 45.37 | |||||||||||||
2022 | 18.97 | 18.61 | 29.65 | 43.00 | 55.29 | 64.50 | 69.61 | 66.71 | 59.37 | 46.13 | 31.53 | 25.45 | 44.07 | |||||||||||||
2023 | 26.35 | 26.39 | 32.94 | 39.77 | 54.68 | 62.33 | 67.29 | 67.58 | 60.93 | 46.39 | 35.13 | 29.29 | 45.76 | |||||||||||||
2024 | 20.84 | 31.97 | 34.44 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.08 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.99 | 25.29 | 32.65 | 41.63 | 51.88 | 61.35 | 65.31 | 63.82 | 56.59 | 44.28 | 32.65 | 24.27 | 43.49 | |||||||||||||
S.D. | 3.00 | 3.27 | 3.55 | 2.91 | 2.67 | 2.38 | 1.92 | 2.12 | 2.64 | 2.61 | 2.97 | 3.22 | 1.39 | |||||||||||||
SKEW | -0.67 | 0.23 | -0.22 | -0.08 | 0.19 | 0.21 | 0.44 | 0.40 | 0.09 | -0.44 | -0.10 | -0.52 | 0.09 | |||||||||||||
MAX | 27.45 | 31.97 | 40.48 | 47.63 | 59.90 | 67.53 | 70.70 | 70.81 | 63.87 | 49.77 | 39.40 | 32.03 | 46.28 | |||||||||||||
MIN | 12.77 | 18.61 | 23.77 | 36.33 | 46.19 | 55.97 | 61.06 | 59.97 | 50.27 | 36.19 | 25.97 | 14.71 | 40.53 | |||||||||||||
YRS | 62 | 61 | 62 | 59 | 60 | 61 | 61 | 60 | 59 | 62 | 61 | 63 | 56 |