YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.00 | 57.45 | 46.33 | 37.55 | ----- | z | ----- | z | 50.08 | h | ||||
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 | 60.50 | u | 58.97 | 45.53 | 38.48 | 24.93 | 17.42 | 37.07 | g | |||||
1958 | 15.48 | 22.82 | 27.68 | 35.40 | 45.10 | 55.80 | 58.08 | g | 59.97 | 52.97 | a | 39.23 | a | 25.44 | c | 17.64 | f | 37.99 | b | |||||||
1959 | 16.29 | 20.46 | 22.61 | 35.97 | 41.90 | 55.27 | 59.07 | a | 60.26 | 45.27 | d | 37.65 | 24.43 | 22.97 | 36.85 | |||||||||||
1960 | 18.03 | a | 19.17 | 29.48 | 36.47 | 43.52 | 54.10 | 59.52 | 57.29 | 50.83 | 37.10 | 26.70 | 18.29 | 37.54 | ||||||||||||
1961 | 15.26 | 19.21 | 29.65 | 33.60 | 42.23 | 52.90 | 56.87 | 57.13 | a | 46.00 | 33.52 | 25.83 | ----- | z | 37.47 | a | ||||||||||
1962 | 15.68 | 23.82 | 22.45 | 34.40 | 41.35 | 51.43 | 59.71 | 54.23 | a | 51.10 | a | 38.55 | 27.53 | 19.93 | b | 36.68 | ||||||||||
1963 | 11.86 | b | 22.82 | 24.90 | 35.40 | 44.61 | 48.86 | a | 60.74 | 59.43 | a | 53.14 | a | 39.69 | e | 27.38 | d | 13.16 | 36.83 | |||||||
1964 | 8.97 | 13.22 | b | 22.87 | 31.83 | 43.60 | a | 49.67 | 60.55 | 56.68 | 49.67 | 35.13 | 23.53 | 19.90 | 34.63 | |||||||||||
1965 | 20.19 | 20.79 | 25.87 | a | 34.83 | a | 42.21 | c | 50.18 | b | 61.31 | b | 57.61 | 49.93 | c | 35.90 | b | 29.87 | 23.61 | 37.69 | ||||||
1966 | 15.58 | 18.29 | 27.20 | a | 35.00 | 46.97 | a | 52.68 | e | 61.71 | 60.28 | b | 50.59 | a | 35.13 | 26.67 | c | 18.39 | 37.37 | |||||||
1967 | 11.19 | 22.14 | 32.57 | c | 36.93 | a | 42.38 | b | 55.29 | b | 62.56 | d | 57.28 | b | 50.07 | a | 35.03 | b | 25.48 | a | 19.44 | d | 37.53 | |||
1968 | 18.45 | 26.31 | 30.00 | 34.83 | 43.16 | 52.89 | b | 59.54 | c | 57.82 | c | 46.07 | a | 38.58 | 27.57 | 16.23 | 37.62 | |||||||||
1969 | 23.10 | 21.00 | a | 21.55 | 39.11 | c | 46.87 | 52.00 | a | 63.52 | 62.18 | c | 51.52 | a | 39.19 | 25.60 | 23.26 | 39.07 | ||||||||
1970 | 16.03 | 24.11 | 28.35 | 30.70 | 43.33 | a | 52.13 | 62.19 | 60.10 | 48.44 | c | 34.90 | 24.47 | 17.87 | 36.89 | |||||||||||
1971 | 13.61 | 20.86 | 26.71 | 33.90 | 40.68 | 51.33 | 61.47 | a | 57.48 | 47.57 | 37.71 | 27.00 | 20.00 | 36.53 | ||||||||||||
1972 | 16.87 | 21.62 | 29.77 | 33.23 | 40.65 | 53.27 | 59.55 | b | 58.68 | 51.30 | 44.71 | 26.10 | 18.16 | 37.83 | ||||||||||||
1973 | 18.42 | 24.25 | 29.97 | 31.17 | 41.94 | 50.96 | b | 58.78 | d | 57.16 | 47.27 | d | 33.74 | 24.33 | 15.61 | 36.13 | ||||||||||
1974 | 19.61 | 15.61 | 31.77 | 31.77 | 43.71 | c | 55.35 | d | 60.00 | 57.39 | 49.21 | a | 42.55 | 26.73 | 15.11 | c | 37.40 | |||||||||
1975 | 17.35 | 22.43 | 28.26 | 31.86 | a | 41.07 | b | 48.30 | 59.71 | 56.78 | d | 49.36 | e | 35.00 | 22.83 | 12.52 | 35.46 | |||||||||
1976 | 14.06 | 24.66 | 27.06 | 34.90 | 44.84 | 51.07 | 59.00 | 56.00 | 50.73 | 34.94 | 19.86 | a | 13.61 | 35.89 | ||||||||||||
1977 | 16.61 | 22.22 | a | 24.48 | 38.03 | 43.26 | 52.83 | 60.10 | 61.03 | 51.50 | 37.52 | 26.23 | 22.26 | 38.01 | ||||||||||||
1978 | 23.48 | 25.75 | 31.23 | 35.70 | 42.00 | a | 52.55 | a | 60.32 | 56.94 | 50.30 | 39.39 | 33.33 | 18.71 | 39.14 | |||||||||||
1979 | 20.65 | 21.14 | 27.10 | 34.87 | 44.23 | 51.40 | 57.19 | 56.35 | 49.97 | 36.61 | 24.57 | 22.00 | 37.17 | |||||||||||||
1980 | 25.97 | 29.18 | a | 31.23 | 34.17 | 42.19 | 51.97 | 61.10 | 59.35 | 51.73 | 33.87 | 23.40 | 22.32 | 38.87 | ||||||||||||
1981 | 19.32 | 21.14 | 31.06 | 38.87 | 47.65 | 55.50 | 61.52 | 59.65 | 51.87 | 39.58 | 25.27 | 19.48 | 39.24 | |||||||||||||
1982 | 19.87 | 23.54 | 29.16 | 36.37 | 44.16 | ----- | z | 61.32 | 61.47 | a | 53.13 | 34.74 | 28.97 | 22.42 | 37.74 | a | ||||||||||
1983 | 21.13 | 25.36 | 32.23 | 33.30 | 40.97 | 51.07 | 60.65 | 61.32 | 55.83 | 41.52 | 30.77 | 23.10 | 39.77 | |||||||||||||
1984 | 18.32 | 19.10 | 28.94 | 35.23 | 50.77 | 54.67 | 60.77 | 60.48 | 51.93 | 40.10 | a | 29.10 | 24.55 | 39.50 | ||||||||||||
1985 | 21.65 | 22.93 | 33.13 | 39.13 | 45.48 | 54.60 | 59.39 | 57.97 | 48.60 | 40.48 | 29.10 | 17.77 | 39.19 | |||||||||||||
1986 | 19.81 | 27.70 | a | 31.90 | 39.93 | 45.29 | 57.03 | 59.45 | 61.00 | 48.63 | 38.52 | 30.43 | 23.19 | 40.24 | ||||||||||||
1987 | 15.32 | 25.61 | 25.42 | 34.40 | 46.97 | a | 53.03 | 56.74 | 58.39 | 49.23 | 39.90 | 25.90 | 18.74 | 37.47 | ||||||||||||
1988 | 17.13 | 23.69 | 25.97 | 37.23 | 46.39 | 56.50 | b | 61.81 | 61.65 | 48.83 | 40.00 | 27.30 | 18.87 | 38.78 | ||||||||||||
1989 | 18.06 | 24.33 | a | 31.35 | 40.07 | 47.45 | 53.93 | 60.39 | 59.06 | 49.63 | 37.77 | 23.83 | 15.19 | 38.42 | ||||||||||||
1990 | 16.97 | 21.00 | 32.35 | 41.63 | 45.35 | 55.70 | 61.26 | 57.13 | 55.10 | 37.06 | 28.40 | 16.23 | 39.02 | |||||||||||||
1991 | 20.35 | 22.71 | 29.84 | 35.33 | 42.29 | 52.30 | 60.68 | 60.03 | 52.10 | 36.63 | a | 27.13 | 24.32 | 38.64 | ||||||||||||
1992 | 17.45 | 26.00 | 30.55 | 38.40 | 48.42 | 52.00 | 58.84 | 58.42 | 49.10 | 39.06 | 22.72 | a | 18.74 | 38.31 | ||||||||||||
1993 | 26.13 | 25.93 | 29.71 | 35.29 | b | 45.00 | a | 53.70 | 60.29 | 59.74 | 48.40 | 36.00 | 23.93 | 17.06 | 38.43 | |||||||||||
1994 | 15.65 | 19.04 | 32.52 | 36.60 | 46.23 | 54.63 | 60.81 | 60.84 | 50.13 | 36.48 | 24.86 | b | 21.68 | 38.29 | ||||||||||||
1995 | 21.67 | a | 27.25 | 31.94 | 34.57 | 46.32 | 51.73 | 55.77 | 61.47 | a | 51.10 | 33.55 | 26.74 | c | 20.68 | 38.57 | ||||||||||
1996 | 18.45 | 26.62 | c | 26.27 | a | 35.44 | c | 44.90 | b | 56.93 | b | 62.97 | 59.31 | b | 47.78 | c | 37.66 | b | 26.48 | a | 18.07 | b | 38.41 | |||
1997 | 17.29 | 22.04 | b | 28.03 | a | 35.29 | b | 47.00 | b | 51.64 | b | 59.30 | a | 59.64 | c | 54.50 | b | 36.13 | 25.66 | a | 16.37 | a | 37.74 | |||
1998 | 18.58 | 22.93 | a | 28.58 | 33.23 | 41.94 | 51.38 | a | ----- | z | 59.52 | 53.03 | 39.85 | e | 26.96 | b | 19.23 | 35.93 | a | |||||||
1999 | 17.76 | b | 19.33 | a | 30.83 | b | 33.93 | 45.29 | 52.97 | a | 61.59 | b | 59.16 | 49.03 | 34.33 | a | 22.23 | 14.13 | 36.72 | |||||||
2000 | 17.03 | a | 23.25 | a | 29.32 | 38.07 | 46.58 | 57.27 | 60.68 | 59.03 | 49.20 | 40.71 | 21.97 | 19.10 | 38.52 | |||||||||||
2001 | 18.10 | 23.43 | 29.84 | 35.97 | 47.65 | 53.57 | 62.32 | 59.55 | 49.03 | 36.13 | 30.40 | 15.48 | 38.45 | |||||||||||||
2002 | 18.39 | 16.79 | 23.32 | 39.33 | 45.35 | 55.67 | 59.74 | 56.61 | 50.80 | 36.42 | 24.93 | 19.81 | 37.26 | |||||||||||||
2003 | 18.00 | 23.39 | 28.39 | 33.77 | 45.61 | 53.83 | 61.71 | 59.87 | 50.27 | 40.35 | 27.27 | 16.58 | 38.25 | |||||||||||||
2004 | 19.00 | 18.86 | 34.20 | a | 37.90 | 44.58 | 51.63 | 58.29 | 56.13 | 47.07 | 38.32 | 27.40 | 17.71 | 37.59 | ||||||||||||
2005 | 24.00 | 29.89 | 29.60 | a | 34.80 | 46.58 | 52.86 | b | 59.94 | 58.52 | 51.70 | 41.55 | 24.03 | 15.45 | 39.08 | |||||||||||
2006 | 15.94 | 20.11 | 28.84 | 38.90 | 47.97 | 56.20 | 63.00 | 60.32 | 46.67 | 36.58 | 24.93 | 16.00 | 37.95 | |||||||||||||
2007 | 16.68 | 21.29 | 28.00 | 35.67 | 47.26 | 54.30 | 60.07 | a | 60.39 | 51.63 | 33.90 | 25.50 | 19.71 | 37.87 | ||||||||||||
2008 | 13.26 | 19.83 | 23.81 | 31.00 | 44.35 | 54.17 | 62.16 | 58.13 | 48.80 | 36.90 | 23.59 | a | 21.16 | 36.43 | ||||||||||||
2009 | 15.87 | 20.07 | 28.90 | 35.60 | 49.32 | c | 55.87 | 61.90 | 56.87 | 50.00 | d | 36.24 | b | 24.23 | 15.58 | 37.54 | ||||||||||
2010 | 17.32 | 22.43 | 25.45 | 37.50 | 42.65 | 55.62 | a | 62.62 | b | 59.23 | 52.20 | 39.74 | 21.33 | 21.23 | 38.11 | |||||||||||
2011 | 13.63 | a | 14.50 | 28.45 | 36.08 | d | 39.62 | b | 51.93 | 63.03 | 62.23 | 51.14 | a | 36.97 | 24.20 | 17.68 | 36.62 | |||||||||
2012 | 18.19 | 22.14 | 26.81 | 39.62 | a | 47.00 | 55.47 | 62.23 | 60.26 | 50.80 | 36.19 | 23.00 | 16.77 | 38.21 | ||||||||||||
2013 | 11.03 | 15.25 | 27.00 | 36.47 | 45.68 | 57.07 | 62.71 | 60.00 | 52.80 | 32.20 | a | 25.50 | 16.61 | 36.86 | ||||||||||||
2014 | 13.06 | 24.82 | 28.06 | 34.40 | 42.73 | a | 54.30 | 62.77 | 57.07 | a | 55.27 | 38.13 | 23.60 | 22.39 | 38.05 | |||||||||||
2015 | 19.39 | 23.04 | 31.52 | 35.37 | 45.77 | 58.97 | 61.29 | 58.35 | 51.17 | 41.97 | 26.63 | 17.55 | 39.25 | |||||||||||||
2016 | 16.55 | 19.86 | 28.87 | 34.80 | 43.17 | a | 56.90 | 60.23 | a | 55.50 | a | 48.93 | 37.48 | 28.83 | 19.65 | 37.56 | ||||||||||
2017 | 20.94 | 24.54 | 29.87 | 35.07 | 44.26 | 55.10 | 60.87 | 57.32 | 47.97 | 34.32 | 25.60 | 13.10 | 37.41 | |||||||||||||
2018 | 10.84 | 21.14 | 26.13 | 36.00 | 47.19 | 56.63 | 62.71 | 57.77 | 48.93 | 39.45 | 19.90 | 16.03 | 36.89 | |||||||||||||
2019 | 16.26 | 21.64 | 31.87 | 38.80 | 43.35 | 54.23 | 62.58 | 60.48 | 53.80 | 34.16 | 25.60 | 22.48 | 38.77 | |||||||||||||
2020 | 19.26 | 23.38 | 33.90 | 38.27 | 48.81 | 54.31 | a | 63.13 | 60.26 | 48.13 | 34.90 | 29.77 | 16.19 | 39.19 | ||||||||||||
2021 | 17.19 | 20.25 | 27.97 | 37.00 | 45.52 | 60.00 | 63.65 | 59.19 | 51.90 | 33.55 | 23.60 | 17.13 | 38.08 | |||||||||||||
2022 | 13.61 | 14.14 | 25.13 | 35.83 | 44.71 | 57.63 | 63.23 | 59.61 | 51.30 | 38.42 | 18.37 | 19.45 | 36.79 | |||||||||||||
2023 | 17.77 | 18.29 | 26.84 | 32.90 | 46.71 | 52.20 | 63.35 | 59.71 | 50.33 | 36.55 | 26.37 | 20.65 | 37.64 | |||||||||||||
2024 | 19.16 | 23.45 | 29.42 | 35.46 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.01 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.52 | 22.00 | 28.57 | 35.72 | 44.73 | 53.80 | 60.79 | 58.86 | 50.21 | 37.39 | 25.70 | 18.68 | 37.84 | |||||||||||||
S.D. | 3.35 | 3.39 | 2.91 | 2.37 | 2.38 | 2.38 | 1.75 | 1.73 | 2.32 | 2.54 | 2.70 | 2.96 | 1.08 | |||||||||||||
SKEW | 0.07 | -0.33 | -0.37 | 0.13 | 0.06 | 0.14 | -0.56 | -0.22 | 0.11 | 0.31 | 0.01 | 0.05 | -0.36 | |||||||||||||
MAX | 26.13 | 29.89 | 34.20 | 41.63 | 50.77 | 60.00 | 63.65 | 62.23 | 55.83 | 44.71 | 33.33 | 24.55 | 40.24 | |||||||||||||
MIN | 8.97 | 13.22 | 21.55 | 30.70 | 39.62 | 48.30 | 55.77 | 54.23 | 45.27 | 32.20 | 18.37 | 12.52 | 34.63 | |||||||||||||
YRS | 67 | 67 | 67 | 66 | 66 | 65 | 65 | 68 | 68 | 68 | 67 | 65 | 62 |