YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 13.73 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.22 | d | 70.57 | b | 58.15 | d | ----- | z | 26.30 | h | 54.92 | h |
1928 | 20.53 | a | 24.33 | b | 36.87 | 47.21 | b | 71.66 | b | 71.44 | c | 78.08 | r | 76.97 | a | 63.96 | c | 54.43 | c | 40.63 | c | 12.42 | l | 50.80 | b | |
1929 | 3.14 | b | 14.26 | a | 38.68 | c | 53.04 | c | 62.78 | d | 77.15 | d | 84.15 | e | 81.72 | b | 65.34 | a | 56.83 | g | 31.96 | e | 18.60 | a | 48.26 | a |
1930 | 7.88 | g | 28.96 | c | 34.63 | a | 57.07 | c | 62.81 | d | 74.54 | f | 84.75 | o | 83.86 | b | 68.10 | a | 51.56 | d | 37.75 | b | 25.72 | b | 50.05 | c |
1931 | 25.70 | a | 33.75 | 35.39 | 57.28 | a | 63.70 | a | 79.57 | b | 81.21 | c | 76.97 | b | 75.45 | a | 60.19 | d | 39.61 | b | 28.40 | a | 54.77 | |||
1932 | 19.81 | d | 23.30 | b | 13.00 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.56 | j |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | 75.86 | x | ----- | z | ----- | z | ----- | z | 71.62 | q | ----- | z | 22.20 | y | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | 16.53 | p | 33.27 | f | 40.87 | h | ----- | 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 | 85.60 | u | 83.17 | b | 69.77 | 48.42 | 26.80 | 30.77 | 51.79 | g | ||||
1960 | 18.39 | 21.31 | 26.45 | 50.47 | 68.29 | 73.10 | 81.10 | 80.16 | 68.93 | 58.13 | 38.40 | 21.71 | 50.54 | |||||||||||||
1961 | 17.26 | ----- | z | 42.52 | 45.80 | 66.23 | 78.48 | i | 78.57 | q | 83.86 | i | 65.14 | b | 58.06 | 37.40 | 17.58 | 43.75 | d | |||||||
1962 | 10.28 | b | 16.22 | a | 32.07 | b | 48.77 | 64.39 | 74.20 | 75.87 | 80.68 | 66.40 | 60.16 | 40.57 | 24.32 | 49.49 | ||||||||||
1963 | 9.00 | a | 18.93 | 43.26 | 55.87 | 62.74 | 78.40 | 82.20 | a | 80.30 | a | 73.87 | 68.26 | 42.53 | 14.03 | 52.45 | ||||||||||
1964 | 22.68 | 27.07 | 30.67 | a | 54.55 | a | 72.07 | a | 74.90 | 82.66 | b | 74.32 | 67.07 | 56.58 | 37.43 | 14.00 | a | 51.17 | ||||||||
1965 | 10.15 | d | 17.86 | 23.39 | 49.60 | 66.00 | 73.31 | a | 78.26 | 77.97 | 57.47 | 57.45 | b | 34.73 | 28.03 | 47.85 | ||||||||||
1966 | 2.03 | 16.29 | 37.50 | a | 44.13 | 63.55 | 76.14 | a | 83.19 | 76.52 | 71.23 | 56.27 | a | 32.37 | 21.73 | a | 48.41 | |||||||||
1967 | 18.71 | 14.46 | 34.97 | 48.13 | 61.40 | a | 73.33 | 80.19 | 78.97 | 72.50 | 53.97 | 37.34 | a | 22.39 | 49.70 | |||||||||||
1968 | 16.26 | 16.07 | 44.71 | 55.50 | 62.94 | 73.80 | 78.77 | 79.29 | 69.27 | 56.80 | a | 38.00 | 18.32 | 50.81 | ||||||||||||
1969 | 8.81 | 21.96 | 27.70 | a | 56.23 | 68.87 | 68.93 | 79.74 | 84.55 | 70.60 | 48.06 | 38.33 | 24.45 | 49.85 | ||||||||||||
1970 | 8.74 | 21.57 | 27.45 | 48.60 | 64.39 | 79.67 | 83.45 | 83.48 | 73.07 | 55.74 | 33.07 | 17.61 | 49.74 | |||||||||||||
1971 | 6.55 | 21.21 | 32.35 | 54.83 | 66.52 | 79.23 | 76.19 | 80.06 | 70.43 | 56.81 | 34.70 | 21.77 | 50.06 | |||||||||||||
1972 | 9.87 | 13.48 | 31.65 | 47.53 | 70.35 | 78.50 | 78.13 | 80.61 | 66.57 | 52.71 | 32.30 | 13.19 | 47.91 | |||||||||||||
1973 | 20.61 | 25.64 | 44.26 | 53.37 | 67.23 | 76.77 | 78.71 | 82.84 | 66.83 | 62.03 | 33.83 | 17.81 | 52.49 | |||||||||||||
1974 | 11.16 | 23.25 | 29.52 | 51.07 | 61.03 | 76.70 | 84.77 | 74.84 | 67.33 | 60.13 | 38.00 | 27.97 | 50.48 | |||||||||||||
1975 | 19.48 | 19.04 | 26.61 | 42.93 | 68.90 | 73.23 | 82.35 | 78.00 | 66.41 | a | 58.77 | 39.83 | 23.03 | 49.88 | ||||||||||||
1976 | 17.16 | 30.00 | 33.29 | 58.87 | 71.55 | 78.47 | 83.13 | 85.55 | 74.80 | 52.16 | 33.50 | 16.48 | 52.91 | |||||||||||||
1977 | 4.47 | a | 24.04 | 41.87 | 63.07 | 79.29 | 78.17 | 84.32 | 74.10 | 65.93 | 57.52 | 33.57 | 14.39 | 51.73 | ||||||||||||
1978 | 6.19 | 13.21 | 31.35 | 51.87 | 72.29 | 75.90 | 79.87 | 81.39 | 74.67 | 58.00 | 32.70 | 15.13 | 49.38 | |||||||||||||
1979 | 3.94 | 10.29 | 30.26 | 44.53 | 58.81 | 74.34 | a | 78.48 | 73.77 | 72.47 | 51.52 | 30.67 | 28.65 | 46.48 | ||||||||||||
1980 | 15.53 | a | 16.90 | 29.32 | 62.60 | 76.90 | 78.10 | 84.13 | 77.52 | 67.33 | 51.74 | 40.83 | 22.29 | 51.93 | ||||||||||||
1981 | 22.97 | 28.61 | 45.58 | 58.77 | 69.00 | 72.03 | 81.39 | 80.10 | 69.93 | 52.97 | 44.57 | 19.19 | 53.76 | |||||||||||||
1982 | 5.32 | 19.57 | 30.94 | 51.62 | a | 68.43 | a | 70.79 | a | 81.00 | a | 79.32 | 69.77 | 55.87 | 31.83 | a | 28.65 | 49.43 | ||||||||
1983 | 23.90 | 29.29 | 37.55 | 52.27 | 65.52 | 75.43 | 83.26 | 86.03 | 68.41 | a | 53.93 | a | 36.83 | 6.90 | 51.61 | |||||||||||
1984 | 16.94 | 32.66 | 32.26 | 57.47 | 68.52 | 75.73 | 82.63 | a | 83.71 | 66.50 | b | 56.84 | 37.60 | 20.52 | b | 52.61 | ||||||||||
1985 | 14.70 | a | 19.57 | 40.94 | 58.93 | 71.53 | a | 70.31 | a | 80.00 | 73.61 | 63.27 | 56.07 | a | 25.43 | 11.61 | 48.83 | |||||||||
1986 | 23.34 | b | 19.04 | 41.06 | 55.37 | 70.03 | b | 78.14 | a | 81.32 | 77.65 | 65.63 | 58.13 | 31.13 | 29.19 | 52.50 | ||||||||||
1987 | 26.83 | b | 34.43 | 40.90 | 67.60 | 74.03 | 80.20 | 83.29 | 79.48 | b | 71.93 | 53.42 | 41.97 | 25.74 | 56.65 | |||||||||||
1988 | 15.97 | a | 18.11 | b | 36.26 | 60.00 | 76.87 | 84.60 | 87.13 | 83.73 | a | 71.10 | 53.45 | 35.41 | a | 23.97 | a | 53.88 | ||||||||
1989 | 23.67 | a | 11.89 | a | 29.06 | 50.17 | 71.13 | 74.45 | a | 86.48 | 83.03 | 71.60 | 59.30 | a | 33.73 | 13.90 | 50.70 | |||||||||
1990 | 30.84 | 28.00 | 40.61 | 54.23 | 68.55 | 76.73 | 80.19 | 83.84 | 75.03 | 58.61 | 43.13 | 21.94 | 55.14 | |||||||||||||
1991 | 14.35 | 30.68 | 40.61 | 58.27 | 71.42 | 78.63 | 79.94 | 84.65 | 69.27 | 53.42 | 29.28 | a | 26.97 | 53.12 | ||||||||||||
1992 | 25.48 | 30.24 | 40.10 | 51.17 | 73.45 | 73.27 | 72.57 | a | 75.13 | a | 66.93 | b | 57.13 | 30.50 | 18.40 | a | 51.20 | |||||||||
1993 | 17.00 | b | 18.07 | 35.77 | 54.10 | 68.26 | 72.10 | 74.30 | a | 78.16 | 65.83 | 56.16 | 32.30 | 23.26 | 49.61 | |||||||||||
1994 | 5.47 | a | 15.93 | 38.03 | 55.27 | 73.40 | a | 76.53 | 76.63 | a | 78.24 | b | 73.14 | a | 59.45 | 40.73 | 29.68 | 51.88 | ||||||||
1995 | 18.50 | a | 22.04 | 36.86 | b | 46.97 | a | 66.97 | 82.33 | 78.73 | a | 82.42 | 71.72 | a | 52.67 | a | 28.23 | 18.23 | 50.47 | |||||||
1996 | 11.12 | e | 19.90 | 26.94 | 44.46 | b | 66.07 | a | 79.10 | 78.93 | a | 82.77 | 71.41 | a | 58.58 | 28.57 | b | 13.79 | c | 48.47 | ||||||
1997 | 12.29 | c | 25.19 | b | 33.07 | a | 49.69 | a | 64.50 | a | 80.40 | 79.07 | a | 78.94 | 76.13 | 59.87 | a | 30.63 | 29.68 | 51.62 | ||||||
1998 | 21.69 | b | 35.61 | 36.10 | 62.63 | 74.57 | c | 71.15 | d | 83.50 | c | 86.19 | 74.79 | b | 46.46 | c | 29.41 | c | 23.10 | a | 53.77 | |||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.87 | a | ----- | z | ----- | z | 44.87 | k |
2010 | 16.23 | 22.32 | 43.26 | 61.50 | 66.19 | 72.90 | 80.13 | 79.77 | 63.33 | 59.42 | 37.47 | 16.81 | 51.61 | |||||||||||||
2011 | 10.19 | 20.43 | 30.94 | 50.03 | 63.48 | 73.67 | 83.16 | 79.52 | 69.40 | 60.48 | 40.27 | 29.81 | 50.95 | |||||||||||||
2012 | 25.00 | 27.31 | 51.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.25 | f | ----- | z | ----- | z | ----- | z | 34.46 | i | |||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | 65.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.26 | k | |
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 | 20.84 | 20.84 | k | |
2017 | 18.97 | 29.64 | 38.42 | 53.70 | 65.13 | 76.13 | 81.77 | 76.55 | 70.80 | 58.33 | a | 32.34 | a | 19.94 | 51.81 | |||||||||||
2018 | 16.77 | 15.48 | c | 35.00 | b | 43.27 | 74.65 | 79.14 | h | 80.61 | ----- | z | ----- | z | ----- | z | 24.50 | v | 26.06 | 41.69 | e | |||||
2019 | 12.72 | b | 11.04 | 29.23 | a | 48.52 | g | 61.39 | ----- | z | 81.07 | b | 74.70 | k | 68.93 | b | 47.86 | b | 33.40 | e | 19.50 | k | 43.20 | d | ||
2020 | 19.84 | 22.97 | 36.71 | 48.30 | 64.10 | 79.67 | 83.03 | 79.89 | d | 65.97 | 47.52 | 43.04 | f | 27.78 | h | 54.80 | b | |||||||||
2021 | 22.63 | d | 15.00 | d | 45.20 | f | 50.13 | 68.23 | 83.20 | 84.97 | ----- | z | ----- | z | 56.54 | g | 39.43 | 19.16 | 47.84 | d | ||||||
2022 | 10.26 | 10.86 | 32.35 | 41.03 | 64.45 | 78.73 | 82.06 | 78.21 | q | 72.93 | 52.84 | 33.90 | 18.39 | 45.26 | a | |||||||||||
2023 | 19.68 | 18.43 | 25.74 | ----- | z | ----- | z | ----- | z | 80.58 | g | 81.00 | ----- | z | ----- | z | 40.03 | ----- | z | 36.98 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.61 | 21.62 | 35.23 | 52.80 | 67.88 | 76.16 | 81.00 | 79.97 | 69.32 | 55.63 | 35.39 | 21.28 | 51.13 | |||||||||||||
S.D. | 6.90 | 6.56 | 6.02 | 5.91 | 4.58 | 3.50 | 2.98 | 3.36 | 3.76 | 4.42 | 4.55 | 5.63 | 2.11 | |||||||||||||
SKEW | -0.11 | 0.29 | 0.25 | 0.19 | 0.39 | 0.15 | -0.51 | -0.06 | -0.42 | -0.26 | -0.08 | -0.18 | 0.29 | |||||||||||||
MAX | 30.84 | 35.61 | 51.06 | 67.60 | 79.29 | 84.60 | 87.13 | 86.19 | 76.13 | 68.26 | 44.57 | 30.77 | 56.65 | |||||||||||||
MIN | 2.03 | 10.29 | 23.39 | 41.03 | 58.81 | 68.93 | 72.57 | 73.61 | 57.47 | 44.87 | 25.43 | 6.90 | 46.48 | |||||||||||||
YRS | 54 | 53 | 52 | 50 | 52 | 47 | 48 | 49 | 51 | 51 | 51 | 50 | 42 |