YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 46.16 | 31.97 | 28.13 | 35.42 | i | |||
1938 | 27.55 | 33.36 | 38.97 | 42.60 | 52.19 | 61.60 | 63.39 | 61.52 | 55.13 | 44.97 | 27.17 | 24.35 | 44.40 | |||||||||||||
1939 | 26.16 | 19.96 | 34.71 | 41.87 | 51.00 | 59.53 | 61.48 | 59.03 | 51.77 | 42.23 | 28.93 | ----- | z | 43.33 | a | |||||||||||
1940 | 15.90 | a | 24.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.23 | j | |
1941 | ----- | z | ----- | z | 34.61 | 44.37 | 55.10 | 59.14 | a | 63.37 | a | 62.26 | 58.52 | a | 49.71 | 36.69 | a | 29.83 | a | 49.36 | b | |||||
1942 | 23.39 | 27.25 | 31.90 | 44.20 | 50.13 | 60.43 | 61.10 | 60.74 | 53.00 | 43.90 | 37.60 | 26.03 | 43.31 | |||||||||||||
1943 | 22.77 | 25.64 | 27.26 | 44.80 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.12 | h | ||||
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 | 51.58 | 34.28 | a | 31.66 | b | 39.17 | i | |
1947 | 27.59 | b | 24.81 | a | 29.87 | a | 41.61 | b | 50.61 | 59.13 | 62.26 | ----- | z | ----- | z | 46.13 | 28.43 | 26.32 | 39.68 | b | ||||||
1948 | 19.06 | 28.17 | 32.87 | 47.47 | 55.06 | 63.83 | 65.29 | 63.16 | 54.57 | 45.61 | 30.07 | 29.23 | 44.53 | |||||||||||||
1949 | 22.10 | 31.93 | 35.65 | 44.48 | g | 54.90 | 61.47 | 64.71 | 61.52 | 55.21 | a | 44.74 | 35.23 | 26.68 | 44.92 | a | ||||||||||
1950 | 28.84 | 30.64 | 30.45 | 42.07 | 52.16 | 63.27 | 64.39 | 66.03 | 58.37 | 48.06 | 30.77 | 25.26 | 45.03 | |||||||||||||
1951 | 21.67 | a | 29.39 | 32.55 | 40.60 | 54.35 | 66.53 | 68.97 | 68.03 | 56.53 | 46.71 | 29.63 | 28.74 | 45.31 | ||||||||||||
1952 | 30.97 | 29.79 | a | 31.74 | 42.87 | 52.13 | 65.57 | 66.03 | 69.00 | c | 56.93 | 40.29 | 31.77 | 24.55 | 45.14 | |||||||||||
1953 | 31.37 | a | 27.86 | 38.06 | 39.52 | c | 51.13 | 71.03 | 66.23 | 66.16 | 53.77 | 48.00 | 33.67 | 24.65 | 45.95 | |||||||||||
1954 | 24.42 | 31.36 | 32.39 | 48.03 | 51.77 | 62.47 | 68.90 | 67.48 | 62.90 | 46.63 | d | 32.48 | a | 27.64 | i | 48.08 | a | |||||||||
1955 | 26.97 | 23.54 | 33.00 | l | ----- | z | 55.64 | f | 60.43 | 63.35 | 63.55 | 56.45 | a | 45.03 | 30.07 | 29.81 | 44.35 | c | ||||||||
1956 | 26.85 | d | 25.10 | 34.74 | 41.47 | 57.35 | 65.97 | 65.65 | 61.29 | 59.18 | h | 48.70 | d | 31.07 | c | 29.54 | c | 44.34 | a | |||||||
1957 | 26.90 | a | 36.81 | a | 36.58 | 40.87 | 52.48 | 61.63 | 66.16 | 65.84 | 55.13 | 46.13 | 34.14 | b | 29.26 | 46.00 | ||||||||||
1958 | 24.00 | 29.86 | 32.58 | 41.53 | 55.03 | 64.70 | 67.35 | 64.58 | 58.43 | 49.68 | 34.82 | b | 26.93 | b | 45.79 | |||||||||||
1959 | 23.13 | 28.04 | b | 31.48 | d | 44.33 | 57.52 | 61.16 | k | 65.94 | 66.68 | 57.33 | 41.48 | 29.33 | c | 31.50 | e | 43.34 | a | |||||||
1960 | 24.48 | 24.25 | a | 31.65 | e | 45.82 | b | 51.84 | 65.73 | 66.19 | 66.09 | h | 56.20 | 47.82 | c | 34.52 | g | 28.23 | 44.22 | b | ||||||
1961 | 20.97 | 28.89 | 35.48 | b | 43.71 | b | 55.10 | 61.23 | 63.39 | 61.65 | 55.83 | 44.35 | 33.60 | 26.65 | 44.24 | |||||||||||
1962 | 21.13 | 32.21 | d | 33.10 | 45.30 | 57.10 | 59.20 | e | 65.06 | ----- | z | ----- | z | 50.35 | 38.04 | b | 30.66 | b | 43.21 | b | ||||||
1963 | 17.03 | 27.61 | 35.19 | ----- | z | 56.94 | 61.33 | 65.19 | 63.61 | 58.03 | 47.87 | 33.87 | 23.65 | 44.57 | a | |||||||||||
1964 | 23.84 | 23.62 | c | 31.39 | 40.80 | 55.16 | f | 59.55 | a | 64.79 | c | 63.61 | 57.07 | 43.45 | 34.73 | 27.03 | 42.72 | a | ||||||||
1965 | 26.79 | b | 21.57 | 24.90 | 44.80 | 54.39 | 62.03 | 63.61 | 61.55 | 54.53 | 42.13 | 38.07 | 29.84 | 43.68 | ||||||||||||
1966 | 17.81 | 21.46 | 31.52 | 41.80 | 51.16 | 62.00 | 65.90 | 62.19 | 56.93 | 38.90 | 33.41 | a | 21.43 | c | 42.04 | |||||||||||
1967 | 20.23 | 24.25 | 36.19 | 47.66 | a | 47.07 | a | 61.03 | 62.94 | 59.16 | 54.80 | 41.29 | 33.45 | a | 23.39 | 42.62 | ||||||||||
1968 | 26.90 | 26.24 | 34.61 | 40.54 | b | 50.13 | a | 58.83 | a | 62.58 | 62.13 | 50.27 | 44.61 | 32.63 | 23.94 | 42.78 | ||||||||||
1969 | 27.58 | 27.89 | 25.77 | 45.00 | 52.10 | 58.47 | 65.39 | 64.06 | 57.73 | 43.94 | 32.60 | 27.77 | 44.03 | |||||||||||||
1970 | 20.90 | 28.11 | 29.90 | 39.70 | 49.26 | 58.60 | 63.35 | 62.19 | 55.93 | 40.16 | 31.10 | 26.81 | 42.17 | |||||||||||||
1971 | 22.97 | 23.89 | 29.10 | 41.27 | 49.23 | a | 62.20 | 62.19 | 60.48 | 55.23 | 46.16 | 34.23 | 28.10 | 42.92 | ||||||||||||
1972 | 21.74 | 24.52 | 34.74 | 44.90 | 52.00 | 59.93 | 62.19 | 61.42 | 57.17 | 44.16 | 28.33 | 21.84 | 42.75 | |||||||||||||
1973 | 22.48 | 24.89 | 34.90 | 37.53 | 49.29 | 56.57 | 62.77 | 59.13 | 55.53 | 43.81 | 33.17 | 22.29 | 41.86 | |||||||||||||
1974 | 22.10 | 21.54 | 38.16 | 43.47 | 54.23 | 58.50 | 63.37 | a | 60.52 | 51.07 | 46.84 | 34.13 | 25.45 | 43.28 | ||||||||||||
1975 | 24.84 | 25.50 | 29.52 | 38.40 | 49.58 | 59.70 | 62.58 | 60.00 | 51.40 | 40.03 | 29.53 | 24.97 | 41.34 | |||||||||||||
1976 | 20.00 | 31.14 | 31.77 | 46.80 | 48.58 | 58.90 | 62.16 | 59.94 | 55.73 | 36.97 | 27.33 | 22.26 | 41.80 | |||||||||||||
1977 | 18.42 | 26.61 | 30.77 | 44.33 | 56.03 | 61.90 | 63.84 | 64.19 | 58.13 | 45.45 | 32.80 | 26.77 | 44.10 | |||||||||||||
1978 | 20.39 | 23.11 | 32.13 | 45.10 | 52.55 | 61.73 | 64.77 | 61.73 | a | 57.80 | 44.55 | 37.07 | 21.87 | 43.57 | ||||||||||||
1979 | 18.94 | 23.50 | 34.35 | 43.03 | 50.16 | 57.90 | 64.32 | 59.84 | 54.40 | 42.58 | 28.33 | 25.48 | 41.90 | |||||||||||||
1980 | 25.97 | 26.31 | 29.10 | 38.77 | 50.90 | 63.87 | 64.29 | 63.39 | 59.13 | 42.48 | 30.03 | 28.23 | 43.54 | |||||||||||||
1981 | 25.65 | 25.93 | 34.97 | 46.80 | 51.97 | 61.37 | 64.32 | 61.32 | 55.33 | 45.58 | 35.40 | 28.32 | 44.75 | |||||||||||||
1982 | 22.87 | 24.21 | 33.90 | 42.07 | 51.45 | 59.30 | 65.03 | ----- | z | 56.60 | 42.39 | 32.73 | 25.58 | 41.47 | a | |||||||||||
1983 | 21.16 | 28.93 | 33.03 | 37.57 | 48.03 | 57.86 | a | 63.90 | a | 63.06 | 56.40 | 48.69 | b | 37.47 | 18.45 | 42.88 | ||||||||||
1984 | 22.71 | 25.07 | 30.81 | 39.00 | 51.74 | 62.17 | 62.13 | 62.16 | 51.27 | 44.06 | 34.53 | 30.84 | 43.04 | |||||||||||||
1985 | 22.61 | 25.75 | 37.17 | a | 45.10 | a | 52.48 | 59.20 | 61.58 | 63.48 | 55.83 | 46.23 | a | 32.67 | 21.74 | 43.65 | ||||||||||
1986 | 24.84 | 30.82 | 35.68 | 45.90 | 50.68 | 61.13 | 63.58 | 62.74 | 57.80 | 46.00 | 32.87 | 28.61 | 45.05 | |||||||||||||
1987 | 23.16 | 31.11 | 29.81 | 38.13 | 52.26 | 60.40 | 63.55 | 62.13 | 55.13 | 43.65 | 32.47 | 23.94 | 42.98 | |||||||||||||
1988 | 21.87 | 25.41 | 28.84 | 39.57 | 50.48 | 59.77 | 63.61 | 62.84 | 53.80 | 44.71 | 32.70 | 24.94 | 42.38 | |||||||||||||
1989 | 26.16 | 25.43 | 33.06 | 43.03 | 53.90 | 59.03 | 63.58 | 62.39 | 51.80 | 43.39 | 30.13 | 19.23 | 42.59 | |||||||||||||
1990 | 24.74 | 27.79 | 34.81 | 43.63 | 50.10 | 64.07 | 62.32 | 61.19 | 58.63 | 42.23 | 36.03 | 21.52 | 43.92 | |||||||||||||
1991 | 24.68 | 29.57 | 33.61 | 41.30 | 54.97 | 61.83 | 62.68 | 62.32 | 55.07 | 42.87 | 30.60 | 29.65 | 44.10 | |||||||||||||
1992 | 26.77 | 32.10 | 35.65 | 44.13 | 52.00 | 59.13 | 63.35 | 61.32 | 54.93 | 43.35 | 30.37 | 26.94 | 44.17 | |||||||||||||
1993 | 25.90 | 26.32 | 32.13 | 40.60 | 50.87 | 61.27 | 66.33 | a | 62.74 | 52.80 | 41.52 | 28.03 | 25.06 | 42.80 | ||||||||||||
1994 | 23.35 | 23.32 | 34.61 | 40.47 | 54.39 | 63.70 | 64.35 | 62.60 | a | 55.83 | 45.77 | 35.30 | 29.48 | 44.43 | ||||||||||||
1995 | 26.97 | 31.14 | 33.87 | 40.67 | 52.35 | 59.83 | 64.55 | 63.90 | 57.00 | 41.94 | 33.33 | 26.45 | 44.33 | |||||||||||||
1996 | 21.84 | 28.59 | 28.48 | 40.07 | 57.29 | 62.87 | 65.16 | 64.13 | 54.97 | 43.00 | 32.57 | 25.42 | 43.70 | |||||||||||||
1997 | 24.35 | 28.39 | 33.65 | 38.55 | a | 52.39 | 59.03 | 63.87 | 62.77 | 58.47 | 45.06 | 31.30 | 24.16 | 43.50 | ||||||||||||
1998 | 26.94 | 30.71 | 30.35 | 38.50 | 53.68 | 61.77 | 66.74 | 63.90 | 59.87 | 48.77 | 36.97 | 27.68 | 45.49 | |||||||||||||
1999 | 27.55 | 30.07 | 35.13 | 41.97 | 51.35 | 60.33 | 64.55 | 64.81 | 55.63 | 41.81 | 35.00 | 26.52 | 44.56 | |||||||||||||
2000 | 25.00 | 30.45 | 34.61 | 43.90 | 54.13 | a | 62.23 | 64.58 | 62.61 | 55.10 | 48.29 | 29.53 | 23.55 | 44.50 | ||||||||||||
2001 | 25.68 | 28.86 | 34.87 | 45.21 | a | 55.20 | a | 65.10 | 69.61 | 65.58 | 57.75 | b | 44.60 | a | 40.44 | c | 27.67 | d | 46.71 | |||||||
2002 | 27.35 | 26.00 | 31.13 | a | 47.17 | 53.67 | a | 64.17 | 66.03 | a | 66.42 | 57.33 | 47.07 | a | 35.30 | 29.66 | b | 45.94 | ||||||||
2003 | 27.11 | c | 28.86 | 35.35 | 44.60 | 54.19 | 60.93 | 66.35 | 65.84 | 56.27 | 49.68 | 36.50 | 25.74 | 45.95 | ||||||||||||
2004 | 28.06 | 27.66 | 43.10 | 45.87 | 55.84 | 62.67 | 65.00 | 62.84 | 57.17 | 48.58 | 36.73 | 27.06 | 46.71 | |||||||||||||
2005 | 30.97 | 34.36 | 34.48 | 43.07 | 54.81 | 64.30 | 64.60 | a | 64.65 | 59.60 | 48.16 | 35.00 | 25.35 | 46.61 | ||||||||||||
2006 | 29.65 | 27.75 | 38.29 | 48.23 | 57.55 | 65.53 | 67.32 | 66.52 | 55.60 | 47.03 | 37.23 | 27.84 | 47.38 | |||||||||||||
2007 | 24.39 | 27.39 | 41.10 | 40.70 | 54.74 | 60.80 | 64.61 | 66.55 | 60.47 | 48.77 | 34.97 | 28.45 | 46.08 | |||||||||||||
2008 | 23.16 | 28.62 | 34.45 | 41.43 | 53.52 | 64.47 | 65.81 | 63.55 | 55.70 | 45.94 | 33.77 | 26.71 | 44.76 | |||||||||||||
2009 | 25.19 | 31.39 | 36.35 | 41.37 | 54.19 | 64.37 | 66.23 | 64.97 | 55.43 | 43.03 | 35.10 | 22.26 | 44.99 | |||||||||||||
2010 | 23.68 | 27.71 | 34.84 | 44.47 | 53.39 | 66.17 | 65.87 | 64.94 | 60.23 | 46.42 | 31.93 | 27.42 | 45.59 | |||||||||||||
2011 | 20.52 | 21.61 | 36.35 | 44.17 | 50.68 | 65.73 | 68.84 | 68.71 | 56.03 | 45.61 | 33.70 | 27.26 | 44.93 | |||||||||||||
2012 | 25.71 | 28.14 | 39.52 | 47.77 | 55.71 | 65.07 | 66.26 | 65.77 | 56.97 | 44.58 | 35.53 | 26.13 | 46.43 | |||||||||||||
2013 | 27.06 | 27.71 | 32.58 | 37.77 | 52.45 | 65.23 | 65.52 | 64.39 | 59.27 | 42.74 | 32.00 | 24.65 | 44.28 | |||||||||||||
2014 | 19.32 | 26.11 | 29.97 | 41.70 | 51.58 | 65.03 | 65.84 | 64.23 | 61.97 | 46.97 | 29.13 | 30.10 | 44.33 | |||||||||||||
2015 | 24.71 | 28.29 | 34.52 | 44.87 | 51.74 | 63.40 | 66.61 | 63.74 | 60.10 | 50.10 | 34.10 | 27.87 | 45.84 | |||||||||||||
2016 | 26.10 | 29.52 | 38.19 | 44.40 | 51.52 | 63.70 | 67.29 | 63.19 | 60.17 | 48.68 | 39.60 | 26.90 | 46.60 | |||||||||||||
2017 | 28.84 | 33.89 | 38.97 | 45.43 | 49.87 | 63.13 | 65.71 | 63.35 | 56.67 | 45.42 | 36.30 | 25.97 | 46.13 | |||||||||||||
2018 | 19.39 | 25.68 | 37.26 | 39.37 | 57.94 | 65.57 | 66.61 | 64.35 | 58.53 | 48.29 | 30.43 | 27.19 | 45.05 | |||||||||||||
2019 | 26.77 | 27.25 | 34.00 | 43.90 | 52.10 | 61.10 | 65.94 | 66.39 | 62.63 | 41.55 | 30.80 | 29.39 | 45.15 | |||||||||||||
2020 | 27.35 | 25.97 | 41.29 | 42.20 | 54.06 | 62.80 | 68.90 | 65.03 | 52.37 | 41.13 | 36.80 | 23.61 | 45.13 | |||||||||||||
2021 | 26.00 | 21.50 | 34.13 | 41.43 | 53.32 | 64.73 | 65.48 | 64.23 | 57.37 | 45.74 | 33.77 | 31.45 | 44.93 | |||||||||||||
2022 | 20.68 | 19.75 | 29.65 | 42.50 | 53.77 | 65.27 | 68.58 | 65.58 | 58.90 | 46.94 | 33.00 | 27.68 | 44.36 | |||||||||||||
2023 | 27.26 | 27.39 | 34.65 | 39.97 | 54.58 | 61.70 | 67.48 | 66.45 | 60.40 | 47.52 | 35.73 | 29.77 | 46.08 | |||||||||||||
2024 | 23.45 | 32.07 | 36.03 | 43.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.65 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.25 | 27.35 | 33.73 | 42.73 | 52.83 | 62.04 | 64.89 | 63.47 | 56.49 | 45.15 | 33.20 | 26.46 | 44.37 | |||||||||||||
S.D. | 3.27 | 3.40 | 3.37 | 2.73 | 2.41 | 2.63 | 1.91 | 2.24 | 2.61 | 2.90 | 2.94 | 2.83 | 1.43 | |||||||||||||
SKEW | -0.22 | 0.08 | 0.06 | 0.03 | 0.12 | 0.46 | 0.33 | 0.22 | -0.02 | -0.20 | 0.02 | -0.46 | -0.08 | |||||||||||||
MAX | 31.37 | 36.81 | 43.10 | 48.23 | 57.94 | 71.03 | 69.61 | 69.00 | 62.90 | 51.58 | 40.44 | 31.66 | 47.38 | |||||||||||||
MIN | 15.90 | 19.75 | 24.90 | 37.53 | 47.07 | 56.57 | 61.10 | 59.03 | 50.27 | 36.97 | 27.17 | 18.45 | 41.34 | |||||||||||||
YRS | 83 | 83 | 82 | 80 | 79 | 80 | 81 | 77 | 78 | 83 | 82 | 81 | 68 |