YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1923 | ----- | z | ----- | z | 26.80 | k | 41.67 | 49.07 | a | 59.40 | 63.03 | 63.16 | 54.47 | 43.26 | 31.43 | 22.77 | 47.58 | c | ||||||||
1924 | 18.55 | 25.97 | 25.74 | 38.50 | 46.00 | 60.50 | 62.16 | 63.90 | 51.50 | 43.61 | 33.03 | a | 16.19 | 40.47 | ||||||||||||
1925 | 16.52 | 26.46 | 34.10 | 43.67 | 51.58 | 61.57 | 65.06 | 60.35 | 56.50 | 38.45 | 30.40 | 22.48 | 42.26 | |||||||||||||
1926 | 21.00 | 26.36 | 30.45 | 37.43 | 49.84 | 57.60 | 60.39 | 60.97 | 56.40 | 45.77 | 29.67 | 21.10 | 41.41 | |||||||||||||
1927 | 24.39 | 28.32 | 30.03 | 43.27 | 53.97 | 57.37 | 63.77 | 61.13 | 55.10 | 43.84 | 34.50 | 18.58 | 42.86 | |||||||||||||
1928 | 20.84 | 23.69 | 33.26 | 37.03 | 50.65 | 56.60 | 64.35 | 61.10 | 52.47 | 45.62 | b | 30.30 | 25.03 | 41.74 | ||||||||||||
1929 | 20.19 | 15.04 | 29.74 | 40.47 | 47.61 | 58.97 | 63.33 | a | 63.10 | 54.33 | 45.35 | 24.14 | b | 22.03 | 40.36 | |||||||||||
1930 | 11.35 | 29.00 | 27.29 | 45.40 | 48.45 | 59.70 | 64.23 | 63.65 | 55.83 | 44.55 | 32.70 | 22.10 | 42.02 | |||||||||||||
1931 | 23.27 | a | 30.39 | 26.68 | 39.37 | 47.52 | 60.77 | 64.06 | 60.90 | 59.83 | 45.74 | 31.77 | 27.00 | 43.11 | ||||||||||||
1932 | 21.06 | 32.00 | 25.58 | 41.03 | 51.71 | 58.83 | 65.23 | 62.68 | 53.40 | 41.32 | 28.70 | 18.52 | 41.67 | |||||||||||||
1933 | 26.42 | 18.61 | 32.00 | 37.47 | 48.26 | 61.87 | 65.87 | 62.97 | 59.20 | 44.32 | 33.43 | 28.00 | 43.20 | |||||||||||||
1934 | 23.81 | 25.43 | 29.94 | 44.47 | 53.52 | 61.40 | 67.16 | 67.03 | 52.17 | 47.03 | 35.50 | 25.42 | 44.41 | |||||||||||||
1935 | 26.30 | a | 26.75 | 36.74 | 40.00 | 47.84 | 58.97 | 64.77 | 64.74 | 53.07 | 44.03 | 30.03 | 25.71 | 43.25 | ||||||||||||
1936 | 21.65 | 16.28 | 33.84 | 38.63 | 53.77 | 60.43 | 64.61 | 64.97 | 57.60 | 41.97 | 29.63 | 27.06 | 42.54 | |||||||||||||
1937 | 15.65 | 23.00 | 28.19 | 41.00 | 53.35 | 59.20 | 64.39 | 66.55 | 58.30 | 44.26 | 30.87 | 24.90 | 42.47 | |||||||||||||
1938 | 22.84 | 26.82 | 36.03 | 41.10 | 50.81 | 60.30 | 64.26 | 65.03 | 57.00 | 47.68 | 30.20 | 26.10 | 44.01 | |||||||||||||
1939 | 28.90 | 19.64 | 34.03 | 41.23 | 50.97 | 60.00 | 63.84 | 60.77 | 57.00 | 44.42 | 30.67 | 27.19 | 43.22 | |||||||||||||
1940 | 17.32 | 26.24 | 31.68 | 40.40 | 50.84 | 58.07 | 65.16 | 61.84 | 56.17 | 46.84 | 31.53 | 29.77 | 42.99 | |||||||||||||
1941 | 27.45 | 30.25 | 32.42 | 43.70 | 53.00 | 57.87 | 61.71 | 62.00 | 56.17 | 47.58 | 34.33 | 28.45 | 44.58 | |||||||||||||
1942 | 21.61 | 22.82 | 29.87 | 42.93 | 47.77 | 58.97 | 62.13 | 61.23 | 52.50 | 44.29 | 34.52 | a | 25.84 | 42.04 | ||||||||||||
1943 | 24.55 | 28.93 | 27.42 | 44.87 | 48.45 | 60.53 | 64.06 | 65.65 | 53.23 | 43.19 | 30.03 | a | 22.80 | a | 42.81 | |||||||||||
1944 | 22.58 | 29.79 | 28.65 | 37.90 | 50.23 | 60.23 | 62.94 | 63.77 | 53.83 | 45.03 | 34.10 | 24.87 | 42.83 | |||||||||||||
1945 | 25.23 | 28.11 | 33.32 | 36.03 | 48.97 | 56.43 | 62.58 | 63.16 | 53.67 | 44.68 | 33.77 | 22.58 | 42.38 | |||||||||||||
1946 | 23.81 | 27.14 | 34.87 | 46.03 | 47.26 | 60.63 | 65.81 | 64.13 | 57.37 | 46.55 | 33.33 | 29.77 | 44.73 | |||||||||||||
1947 | 23.16 | 22.82 | 28.61 | 39.10 | 50.16 | 58.10 | 64.04 | d | 64.19 | 57.90 | 48.58 | 27.17 | 25.29 | 42.43 | ||||||||||||
1948 | 19.10 | 23.69 | 26.29 | 43.60 | 50.32 | 60.47 | 63.47 | a | 61.71 | 54.17 | 42.23 | 28.10 | 27.03 | 41.68 | ||||||||||||
1949 | 16.90 | 26.61 | 31.42 | 40.23 | 49.94 | 57.30 | 62.61 | 59.68 | 54.23 | 41.23 | a | 34.13 | 22.55 | 41.40 | ||||||||||||
1950 | 21.10 | b | 28.71 | 28.45 | 38.93 | 48.87 | 59.37 | 61.84 | 58.61 | 55.10 | 48.26 | 29.47 | 24.23 | 41.91 | ||||||||||||
1951 | 21.94 | 26.04 | 30.03 | 37.57 | 49.65 | 56.90 | 65.23 | 64.03 | 52.73 | 43.50 | a | 28.80 | 24.48 | 41.74 | ||||||||||||
1952 | 27.87 | 27.14 | 28.81 | 39.03 | 48.87 | 63.23 | 62.03 | 64.81 | 53.60 | 39.65 | 28.40 | 23.74 | 42.26 | |||||||||||||
1953 | 28.48 | 24.32 | 35.77 | 37.47 | 46.35 | 65.00 | 64.90 | 62.58 | 53.77 | 45.06 | 32.30 | 22.74 | 43.23 | |||||||||||||
1954 | 23.71 | 30.07 | 28.87 | 44.63 | 48.52 | 60.40 | 66.13 | 63.61 | 56.77 | 45.19 | 33.67 | 28.27 | i | 45.60 | a | |||||||||||
1955 | 22.65 | 22.04 | 30.13 | 39.67 | 51.10 | 55.97 | 63.03 | 62.55 | 57.70 | 44.39 | 28.13 | 24.90 | 41.85 | |||||||||||||
1956 | 23.42 | 19.40 | d | 29.85 | d | 35.11 | c | 52.97 | 62.03 | 62.39 | 60.94 | 55.60 | 46.84 | 26.69 | a | 24.60 | a | 41.65 | ||||||||
1957 | 17.86 | b | 31.64 | 32.84 | 36.62 | a | 45.84 | 57.33 | 68.61 | 66.58 | 51.77 | 44.00 | 31.10 | a | 26.45 | 42.55 | ||||||||||
1958 | 21.26 | 26.82 | 25.74 | 37.47 | 51.65 | 60.57 | 63.19 | 62.74 | 56.50 | 42.29 | 28.20 | 21.65 | 41.51 | |||||||||||||
1959 | 16.19 | 23.18 | 27.10 | 37.47 | 50.06 | 60.27 | 61.35 | 63.48 | 52.83 | 38.29 | 23.50 | 26.13 | 39.99 | |||||||||||||
1960 | 18.87 | 19.52 | 25.29 | 39.73 | 45.16 | 57.93 | a | 61.45 | 61.03 | 54.23 | 41.97 | 29.47 | 22.19 | 39.74 | ||||||||||||
1961 | 17.16 | 22.64 | 28.48 | 34.04 | d | 46.43 | a | 57.73 | 60.19 | 60.35 | 49.90 | 38.48 | 28.50 | 21.42 | 38.78 | |||||||||||
1962 | 14.32 | 25.64 | 24.84 | 38.67 | 51.45 | 56.57 | 62.65 | 60.61 | 54.77 | 42.19 | 31.87 | 24.39 | 40.66 | |||||||||||||
1963 | 9.81 | 24.54 | 30.23 | 42.37 | 52.20 | a | 58.93 | a | 65.58 | 62.81 | 56.53 | 47.63 | a | 31.40 | 18.35 | 41.70 | ||||||||||
1964 | 19.74 | 19.24 | 24.13 | 36.47 | 49.48 | 57.47 | 65.16 | 61.39 | 54.60 | 41.50 | a | 31.57 | 23.39 | 40.34 | ||||||||||||
1965 | 23.06 | 19.79 | 20.84 | 40.27 | 50.42 | 57.53 | 63.52 | 60.65 | 51.55 | a | 42.81 | 35.60 | 26.58 | 41.05 | ||||||||||||
1966 | 14.38 | b | 18.89 | 30.06 | 36.70 | 47.74 | 58.23 | 65.87 | 60.13 | 54.57 | 38.03 | 32.20 | 17.42 | 39.52 | ||||||||||||
1967 | 21.52 | 21.29 | 32.90 | 42.40 | 43.94 | 57.23 | 62.00 | 58.71 | 51.73 | 42.65 | 28.93 | 20.65 | 40.33 | |||||||||||||
1968 | 21.03 | 21.83 | 29.65 | 35.30 | 45.74 | 56.40 | 60.48 | 60.10 | 50.63 | 42.65 | 31.27 | 18.94 | 39.50 | |||||||||||||
1969 | 23.39 | 25.71 | 24.10 | 41.20 | 50.16 | 56.00 | 65.42 | 63.81 | 56.73 | 39.71 | 30.10 | 24.90 | 41.77 | |||||||||||||
1970 | 17.35 | 26.54 | 26.16 | 37.03 | 50.16 | 56.63 | 63.74 | 62.48 | 52.93 | 38.61 | 29.40 | 24.90 | 40.50 | |||||||||||||
1971 | 21.03 | a | 21.29 | 27.55 | 37.73 | 45.29 | 59.83 | 62.26 | 59.06 | 51.73 | 42.48 | 32.90 | 26.55 | 40.64 | ||||||||||||
1972 | 18.06 | 22.86 | 33.19 | 41.60 | 48.77 | 58.47 | 61.26 | 59.58 | 54.83 | 43.13 | 25.97 | a | 19.97 | a | 40.64 | |||||||||||
1973 | 19.74 | 23.11 | 31.84 | 34.50 | 46.26 | 56.30 | 61.06 | 60.42 | 51.70 | 43.65 | 33.03 | 21.81 | 40.28 | |||||||||||||
1974 | 18.32 | 22.32 | 33.90 | 38.23 | 51.87 | 56.80 | 63.29 | 58.55 | 48.23 | 44.52 | 31.77 | 21.00 | 40.73 | |||||||||||||
1975 | 20.52 | 21.00 | 26.52 | 35.33 | 44.94 | 54.93 | 60.42 | 60.58 | 49.83 | 39.52 | 26.97 | 23.06 | 38.63 | |||||||||||||
1976 | 17.39 | 27.55 | 27.71 | 41.97 | 43.84 | 56.57 | 60.68 | 58.94 | 52.63 | 35.55 | 24.70 | 19.97 | 38.96 | |||||||||||||
1977 | 13.90 | 24.75 | 28.61 | 41.07 | 52.19 | 59.40 | 61.48 | 62.06 | 54.23 | 41.45 | 27.73 | 22.61 | 40.79 | |||||||||||||
1978 | 15.97 | 18.96 | 31.81 | 42.47 | 47.70 | a | 60.23 | 62.97 | a | 58.06 | 53.43 | 43.26 | 34.67 | 18.77 | 40.69 | |||||||||||
1979 | 12.58 | 22.96 | 31.52 | 40.13 | 48.26 | 56.83 | 61.74 | 57.16 | 51.50 | 40.32 | 24.33 | 20.58 | 38.99 | |||||||||||||
1980 | 18.68 | 23.17 | 25.19 | 34.47 | 45.97 | 61.70 | 65.48 | 61.52 | 53.27 | 37.87 | 28.03 | 25.90 | 40.10 | |||||||||||||
1981 | 21.66 | b | 23.79 | 32.77 | 44.80 | 47.90 | 60.80 | 64.35 | 60.84 | 53.43 | 43.35 | 35.10 | 23.10 | 42.66 | ||||||||||||
1982 | 20.43 | a | 22.35 | b | 30.23 | 37.14 | b | 47.61 | 53.83 | a | 62.52 | 61.26 | 52.70 | 36.84 | 26.20 | 20.80 | a | 39.33 | ||||||||
1983 | 18.74 | 21.39 | 28.48 | 31.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.10 | h | ||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | 48.42 | 61.70 | 63.84 | 62.48 | 54.50 | 40.20 | a | 29.21 | b | 22.55 | 47.86 | d | ||||||
2003 | 23.16 | 21.89 | 32.90 | 40.10 | 51.45 | 53.60 | 64.48 | 62.35 | 52.34 | a | 43.81 | 32.20 | 21.68 | 41.66 | ||||||||||||
2004 | 21.87 | 20.00 | 36.58 | 40.57 | 50.52 | 57.60 | 61.16 | 59.10 | 54.63 | 43.77 | 31.86 | a | 24.48 | 41.85 | ||||||||||||
2005 | 26.31 | b | 29.46 | 30.29 | 38.67 | 49.35 | 58.73 | 61.90 | 61.55 | 57.10 | 42.72 | b | 30.27 | 20.26 | 42.22 | |||||||||||
2006 | 23.39 | 20.11 | 32.03 | 41.27 | 52.65 | 61.13 | 64.61 | 63.16 | 50.17 | 42.42 | 29.87 | 20.97 | 41.81 | |||||||||||||
2007 | 16.74 | 21.50 | 34.29 | 34.80 | 47.65 | 55.90 | a | 60.94 | 62.97 | 54.93 | 42.26 | 28.77 | 22.23 | 40.25 | ||||||||||||
2008 | 19.52 | 21.21 | 28.19 | 35.37 | 45.17 | a | 56.40 | 60.77 | 60.77 | 50.97 | 41.45 | b | 30.83 | 20.87 | 39.29 | |||||||||||
2009 | 19.74 | 26.31 | b | 28.13 | h | 36.62 | d | 47.19 | 57.90 | 61.65 | 59.61 | 50.50 | 37.61 | 31.83 | 16.26 | 40.47 | a | |||||||||
2010 | 18.48 | 18.75 | 29.32 | 39.80 | 46.19 | 62.10 | 63.48 | 61.94 | 57.30 | 42.65 | 27.57 | 25.68 | 41.10 | |||||||||||||
2011 | 15.81 | 14.82 | 29.70 | a | 37.90 | 45.97 | 61.47 | 66.48 | 66.03 | 53.13 | 42.07 | a | 31.20 | 22.39 | 40.58 | |||||||||||
2012 | 23.16 | 25.07 | 33.54 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.12 | j | ||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.50 | 24.00 | 29.93 | 39.44 | 49.05 | 58.80 | 63.38 | 62.01 | 54.16 | 42.94 | 30.48 | 23.23 | 41.50 | |||||||||||||
S.D. | 3.99 | 3.91 | 3.33 | 3.10 | 2.52 | 2.22 | 1.82 | 2.16 | 2.43 | 2.87 | 2.83 | 3.04 | 1.43 | |||||||||||||
SKEW | -0.23 | -0.10 | -0.09 | 0.04 | -0.02 | 0.10 | 0.28 | 0.20 | 0.06 | -0.34 | -0.35 | -0.14 | 0.05 | |||||||||||||
MAX | 28.90 | 32.00 | 36.74 | 46.03 | 53.97 | 65.00 | 68.61 | 67.03 | 59.83 | 48.58 | 35.60 | 29.77 | 44.73 | |||||||||||||
MIN | 9.81 | 14.82 | 20.84 | 31.77 | 43.84 | 53.60 | 60.19 | 57.16 | 48.23 | 35.55 | 23.50 | 16.19 | 38.63 | |||||||||||||
YRS | 70 | 70 | 68 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 66 |