YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 8.40 | a | 17.00 | a | 42.90 | a | 56.50 | 66.19 | 79.67 | 86.52 | 84.97 | 66.77 | 60.74 | 34.13 | 23.68 | 52.29 | ||||||||||
1930 | 12.55 | 35.39 | 40.42 | 61.03 | a | 67.23 | 79.47 | 88.90 | 86.58 | 73.86 | a | 54.94 | 42.80 | 31.71 | 56.24 | |||||||||||
1931 | 34.71 | 36.89 | a | 38.97 | 60.07 | 67.06 | 82.93 | 86.60 | a | 81.83 | b | 80.20 | 62.19 | 42.07 | 26.94 | 58.37 | ||||||||||
1932 | 20.13 | 26.45 | 31.58 | 58.03 | 71.71 | 81.97 | 88.13 | 84.81 | 75.03 | 53.52 | 39.23 | 25.26 | 54.65 | |||||||||||||
1933 | 26.68 | 23.25 | 43.13 | 55.80 | 68.29 | 91.53 | 88.39 | 86.10 | 81.10 | 60.58 | 41.83 | 23.29 | 57.50 | |||||||||||||
1934 | 29.97 | 32.71 | 42.19 | 60.50 | 86.53 | a | 83.03 | 91.03 | 85.55 | 69.37 | 64.74 | 46.07 | 21.33 | d | 59.42 | |||||||||||
1935 | 16.10 | 36.32 | 41.16 | 48.83 | 62.61 | 75.87 | 90.32 | 83.81 | 76.47 | 61.23 | 31.03 | a | 23.19 | 53.91 | ||||||||||||
1936 | 5.58 | 1.00 | 39.84 | 51.83 | a | 78.10 | a | 85.57 | 99.32 | 89.58 | e | 79.63 | 60.42 | 36.93 | 25.45 | 54.44 | ||||||||||
1937 | 2.23 | 16.36 | 31.65 | 48.80 | e | 71.75 | c | 77.00 | b | 87.52 | 91.57 | a | 73.54 | b | 58.11 | c | 37.68 | b | 23.03 | 51.60 | ||||||
1938 | 22.13 | ----- | z | ----- | z | 58.52 | a | 65.77 | 78.63 | 84.37 | a | 90.52 | 76.23 | 66.84 | 38.67 | 30.13 | 61.18 | b | ||||||||
1939 | 24.77 | 12.32 | 40.39 | 55.17 | a | 76.03 | a | 75.30 | 85.48 | 85.23 | 76.23 | 55.65 | 50.13 | 39.58 | 56.36 | |||||||||||
1940 | 15.06 | 26.79 | 32.55 | 50.77 | 69.21 | c | 77.50 | 87.13 | a | 78.26 | 78.63 | 66.93 | a | 33.50 | 31.13 | 53.96 | ||||||||||
1941 | 21.74 | 21.14 | 34.93 | b | 55.60 | 71.74 | 74.97 | 85.23 | 84.23 | 69.47 | 58.65 | 42.67 | 34.39 | 54.56 | ||||||||||||
1942 | 32.94 | 27.46 | 42.87 | 59.17 | 61.19 | 71.17 | 79.87 | 79.23 | 64.87 | 60.16 | 41.77 | 21.74 | 53.54 | |||||||||||||
1943 | 9.68 | 27.00 | 29.77 | 58.53 | ----- | z | 73.30 | 82.16 | 80.19 | 69.27 | 63.65 | 35.40 | 32.10 | 51.00 | a | |||||||||||
1944 | 34.04 | e | 22.44 | b | 31.46 | e | 51.07 | 71.67 | a | 74.68 | b | 79.34 | b | 78.43 | a | 68.47 | 64.39 | 39.43 | 29.03 | 53.70 | ||||||
1945 | 22.26 | 26.96 | 48.03 | 52.04 | b | 61.26 | 69.31 | a | 81.16 | 80.61 | 68.36 | b | 63.37 | a | 37.23 | d | 17.08 | e | 52.31 | |||||||
1946 | 23.07 | c | 23.12 | c | 48.93 | c | 64.17 | a | 66.93 | b | 79.69 | a | 84.65 | 82.70 | a | 71.31 | a | 55.00 | a | 43.12 | e | 26.81 | e | 55.79 | ||
1947 | 33.04 | d | 22.32 | c | 35.24 | b | 51.39 | b | 65.00 | a | 75.52 | c | 86.03 | 90.50 | a | 74.07 | 70.37 | a | 34.00 | c | 24.33 | d | 55.15 | |||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.43 | a | 86.03 | 82.20 | 62.52 | 41.97 | 25.23 | 64.06 | f | |||||
1949 | 15.48 | 15.46 | 34.00 | 60.70 | 72.13 | a | 79.77 | 86.39 | 90.42 | 72.73 | 58.80 | a | 49.83 | 21.94 | 54.80 | |||||||||||
1950 | 4.16 | 21.25 | 31.03 | 42.87 | 61.58 | 80.23 | 81.03 | 80.58 | 73.43 | 62.35 | 36.13 | 20.26 | 49.58 | |||||||||||||
1951 | 15.94 | 22.96 | 25.87 | 50.87 | 71.29 | 69.73 | 79.52 | 76.65 | 64.10 | 54.77 | a | 32.83 | 17.35 | 48.49 | ||||||||||||
1952 | 12.50 | a | 27.55 | 27.87 | 58.33 | 69.16 | 78.60 | 82.74 | 82.61 | 77.03 | 57.52 | 43.30 | 26.55 | 53.65 | ||||||||||||
1953 | 21.61 | 26.50 | 36.87 | 48.10 | 63.00 | 74.07 | a | 79.97 | 81.65 | 73.07 | 67.90 | 45.43 | 26.77 | 53.75 | ||||||||||||
1954 | 10.13 | 39.14 | 33.90 | 53.93 | 61.81 | 75.47 | 83.26 | 80.10 | 68.67 | 55.03 | 47.40 | 30.35 | 53.27 | |||||||||||||
1955 | 22.68 | 17.86 | 31.68 | 64.20 | 74.03 | 74.97 | 84.26 | 83.35 | 72.73 | 63.10 | 29.63 | 15.26 | 52.81 | |||||||||||||
1956 | 18.77 | 17.52 | 31.45 | 45.76 | a | 65.61 | 82.10 | 77.45 | 80.19 | 69.63 | 66.16 | 38.40 | 29.26 | 51.86 | ||||||||||||
1957 | 14.10 | 24.61 | 38.53 | a | 53.97 | 65.48 | 72.90 | 85.35 | 77.77 | 67.30 | 55.32 | 37.41 | a | 33.61 | 52.20 | |||||||||||
1958 | 26.26 | 23.04 | 37.90 | 55.93 | 71.74 | 69.38 | a | 77.19 | 84.29 | 72.70 | 62.17 | a | 42.10 | 23.65 | 53.86 | |||||||||||
1959 | 15.45 | 20.39 | 44.13 | 56.33 | 66.77 | 80.43 | 83.90 | 85.06 | 71.60 | 50.16 | 32.03 | 34.35 | 53.39 | |||||||||||||
1960 | 20.39 | 22.34 | 28.23 | 54.77 | 70.19 | 74.33 | 85.81 | 82.97 | 74.07 | 62.00 | 43.10 | 21.81 | 53.33 | |||||||||||||
1961 | 19.42 | 24.43 | 43.26 | 47.63 | 61.97 | 81.07 | 79.19 | 84.97 | 66.90 | 60.32 | 40.70 | 18.10 | 52.33 | |||||||||||||
1962 | 17.58 | 18.64 | 28.90 | 52.53 | 65.39 | 72.60 | 76.77 | 81.68 | 67.55 | a | 62.90 | 44.90 | a | 29.55 | 51.58 | |||||||||||
1963 | 13.16 | 24.71 | 45.23 | 55.23 | 65.42 | 77.17 | 82.42 | 80.10 | 73.23 | 71.52 | 46.77 | 17.61 | 54.38 | |||||||||||||
1964 | 25.84 | 32.79 | 33.00 | 55.57 | 69.77 | 76.48 | a | 84.39 | 77.71 | 68.63 | 61.29 | 39.77 | 14.35 | 53.30 | ||||||||||||
1965 | 13.26 | 19.75 | 26.35 | 50.10 | 66.43 | a | 74.77 | 80.94 | 80.81 | 57.07 | 62.71 | 39.63 | 31.42 | 50.27 | ||||||||||||
1966 | 7.00 | 19.75 | 41.55 | 47.67 | 65.13 | 76.43 | 86.81 | 77.29 | 72.00 | 59.52 | 34.83 | 25.52 | 51.12 | |||||||||||||
1967 | 21.19 | 19.18 | 40.48 | 49.60 | 63.26 | 72.60 | 81.52 | 81.68 | 72.97 | 56.55 | 39.63 | 27.55 | 52.18 | |||||||||||||
1968 | 18.03 | 20.62 | 46.45 | 52.63 | 62.42 | 73.67 | 80.29 | 80.23 | 70.67 | 58.67 | a | 39.77 | 19.71 | 51.93 | ||||||||||||
1969 | 9.00 | 22.32 | 27.03 | 55.67 | 68.35 | 68.50 | 79.87 | 86.58 | 75.77 | 52.26 | 40.77 | 27.84 | 51.16 | |||||||||||||
1970 | 11.65 | 25.61 | 30.07 | a | 49.83 | 65.84 | 80.00 | 86.61 | 84.65 | 73.17 | 58.58 | 34.23 | 22.13 | 51.86 | ||||||||||||
1971 | 13.71 | 22.96 | 37.65 | 59.13 | 65.42 | 77.60 | 78.55 | 85.00 | 71.57 | 58.03 | 37.53 | 21.10 | 52.35 | |||||||||||||
1972 | 13.52 | 16.07 | 33.52 | 49.10 | 68.29 | 77.40 | 79.81 | 82.32 | 70.40 | 54.35 | 35.13 | 16.77 | 49.72 | |||||||||||||
1973 | 23.45 | 29.25 | 44.90 | 54.23 | 68.77 | 79.53 | 83.29 | 86.58 | 68.70 | 62.90 | 35.47 | 20.16 | 54.77 | |||||||||||||
1974 | 13.94 | 23.89 | 34.23 | 52.90 | 61.87 | 76.90 | 88.23 | 79.39 | 71.60 | 62.13 | 41.30 | 32.09 | i | 55.12 | a | |||||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | 73.24 | b | 84.30 | 88.62 | b | 91.03 | a | 78.07 | 55.42 | 38.57 | 25.16 | 66.80 | d | |||||
1977 | 10.74 | 31.50 | 42.17 | a | 65.93 | a | 80.63 | a | 81.72 | a | 88.32 | 78.55 | 69.27 | 60.45 | b | 36.57 | 18.37 | a | 55.35 | |||||||
1978 | 5.90 | b | 18.44 | a | 36.33 | a | 52.73 | 72.90 | 79.69 | a | 84.03 | 86.00 | 79.80 | 61.45 | 35.93 | 22.53 | a | 52.98 | ||||||||
1979 | 7.94 | 12.43 | 32.19 | 46.10 | 62.84 | 78.63 | 84.23 | e | 80.26 | 79.43 | 59.32 | 36.67 | 34.52 | 51.21 | ||||||||||||
1980 | 21.17 | a | 24.24 | 35.00 | a | 64.67 | 78.58 | 79.47 | 86.87 | h | 81.94 | 72.70 | 57.74 | 47.10 | 29.13 | 53.79 | a | |||||||||
1981 | 29.61 | 32.89 | 49.68 | 62.83 | 70.06 | 77.28 | a | 86.03 | 84.94 | 75.77 | 55.97 | 48.20 | 22.39 | 57.97 | ||||||||||||
1982 | 6.17 | a | 20.96 | 34.57 | a | 53.87 | 68.58 | 75.07 | a | 90.00 | 86.06 | 72.70 | 56.42 | 34.33 | 31.16 | 52.49 | ||||||||||
1983 | 29.55 | 31.82 | 37.23 | 53.77 | 67.45 | 78.63 | 88.71 | 91.61 | 73.07 | 53.50 | a | 36.87 | ----- | z | 58.38 | a | ||||||||||
1984 | 19.07 | c | 33.50 | a | 32.10 | 55.37 | 67.87 | 78.30 | 86.55 | 88.16 | 68.30 | 57.61 | 41.70 | 23.23 | 54.31 | |||||||||||
1985 | 17.93 | a | 23.32 | 45.45 | 64.37 | 76.90 | 74.43 | b | 87.71 | 78.68 | 66.37 | 57.61 | 26.17 | 18.10 | 53.09 | |||||||||||
1986 | 26.87 | 19.93 | 43.48 | 54.50 | 70.06 | 81.47 | 84.29 | 79.32 | 67.83 | 59.83 | a | 35.00 | 33.29 | 54.66 | ||||||||||||
1987 | 31.20 | a | 38.00 | 39.48 | 68.70 | 78.37 | a | 86.20 | 86.68 | 80.87 | 75.27 | 57.16 | 46.27 | 31.45 | b | 59.97 | ||||||||||
1988 | 20.52 | b | 21.93 | a | 41.50 | a | 62.28 | a | 80.19 | 93.07 | 92.97 | 89.23 | a | 71.43 | 57.35 | 37.93 | 28.27 | a | 58.06 | |||||||
1989 | 23.06 | 12.93 | a | 28.77 | 53.23 | 72.07 | a | 78.47 | 90.35 | 84.35 | 73.27 | 62.87 | 36.66 | a | 17.32 | 52.78 | ||||||||||
1990 | 31.84 | 29.41 | a | 45.00 | 58.20 | 69.55 | 78.17 | 83.23 | 83.58 | 79.50 | 58.26 | 45.43 | 20.23 | 56.87 | ||||||||||||
1991 | 19.00 | b | 33.93 | 40.48 | 60.23 | 70.48 | 80.17 | 82.06 | 86.58 | 71.17 | 55.65 | 30.93 | 29.87 | 55.05 | ||||||||||||
1992 | 27.87 | a | 32.14 | 43.61 | 52.63 | 73.97 | 75.30 | 74.45 | 78.03 | 70.97 | 59.90 | 31.10 | 19.65 | 53.30 | ||||||||||||
1993 | 15.00 | a | 17.89 | 35.71 | 53.00 | 69.52 | 71.97 | 75.00 | 80.06 | 65.23 | 57.97 | 34.14 | a | 23.57 | a | 49.92 | ||||||||||
1994 | 3.79 | b | 13.25 | 36.10 | 56.30 | 75.39 | 80.67 | 80.39 | 80.71 | 74.03 | 59.87 | 41.70 | 23.74 | 52.16 | ||||||||||||
1995 | 17.77 | a | 25.14 | 33.32 | 46.60 | 64.58 | 81.40 | 81.68 | 85.45 | 72.86 | b | 54.47 | a | 32.80 | 21.81 | 51.49 | ||||||||||
1996 | 9.74 | 23.15 | b | 27.48 | 49.34 | a | 64.84 | 80.83 | 80.87 | 83.71 | 71.43 | 57.77 | 24.13 | 13.23 | a | 48.88 | ||||||||||
1997 | 9.90 | b | 23.96 | 31.19 | 48.33 | 64.84 | 82.30 | 84.16 | 81.55 | 75.83 | 59.03 | 30.30 | 30.65 | 51.84 | ||||||||||||
1998 | 17.52 | 33.96 | 30.35 | 61.53 | 73.65 | 73.77 | 85.29 | 83.94 | 79.07 | 57.97 | a | 38.10 | 30.65 | 55.48 | ||||||||||||
1999 | 16.00 | a | 34.68 | 43.10 | 55.87 | 69.00 | 76.90 | 82.29 | 81.90 | 69.21 | a | 56.06 | 50.33 | ----- | z | 57.76 | a | |||||||||
2000 | 23.13 | a | 34.38 | 46.71 | 54.60 | 70.45 | 75.23 | 83.00 | 82.68 | 71.30 | 59.10 | 31.97 | 13.55 | b | 53.84 | |||||||||||
2001 | 25.00 | a | 14.37 | a | 32.35 | 52.47 | 69.87 | a | 76.00 | 85.10 | 84.23 | 70.83 | 56.06 | 57.07 | p | ----- | z | 56.63 | b | |||||||
2002 | ----- | z | ----- | z | ----- | z | 51.63 | 63.87 | 81.30 | 86.14 | j | 79.39 | 75.10 | a | 44.27 | a | 42.43 | w | ----- | z | 65.93 | f | ||||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | 65.16 | 74.17 | 81.96 | d | 84.12 | w | 70.70 | 63.39 | 35.15 | j | ----- | z | 71.08 | g | ||||
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.32 | h | 79.29 | 75.57 | j | 72.79 | a | 51.64 | q | ----- | z | ----- | z | 76.04 | j | |
2005 | ----- | z | ----- | z | ----- | z | 61.63 | 64.68 | 76.43 | 83.41 | d | 79.35 | 74.67 | 57.94 | ----- | z | ----- | z | 71.16 | e | ||||||
2006 | ----- | z | ----- | z | ----- | z | 60.97 | 67.19 | 75.95 | i | 89.57 | a | 83.00 | 68.20 | 54.97 | 42.59 | a | 33.48 | 62.50 | d | ||||||
2007 | 20.07 | a | 14.33 | a | 55.55 | t | 51.07 | 72.55 | 78.57 | 84.35 | 77.27 | a | 71.47 | 59.26 | 39.71 | b | ----- | z | 56.86 | b | ||||||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | 66.60 | a | 73.37 | 84.48 | d | 81.94 | 70.47 | 55.93 | a | 46.50 | n | ----- | z | 72.13 | f | |||
2009 | ----- | z | ----- | z | ----- | z | 51.28 | a | 69.70 | h | 71.68 | e | 78.50 | k | 77.90 | k | 76.75 | r | 49.54 | e | 47.96 | g | 17.36 | c | 47.46 | h |
2010 | 17.71 | j | 19.19 | g | 40.90 | a | 63.80 | e | 66.25 | c | 74.87 | g | 83.31 | b | 83.92 | g | 65.61 | b | 61.48 | 39.67 | 19.14 | j | 60.15 | e | ||
2011 | 14.44 | d | 19.25 | h | 30.56 | m | 50.05 | h | 63.61 | c | 75.43 | g | 85.65 | e | 82.42 | g | 72.46 | f | 61.40 | a | 42.85 | c | 33.43 | c | 50.23 | f |
2012 | 29.15 | e | 33.14 | g | 53.41 | b | 58.05 | h | 71.24 | b | 81.12 | d | 88.00 | 82.20 | k | 74.26 | c | 55.48 | f | 41.09 | s | 19.36 | q | 66.20 | f | |
2013 | 23.55 | b | 20.91 | e | 28.56 | d | 38.67 | c | 68.56 | d | 76.30 | g | 82.56 | d | 80.26 | h | 75.83 | 55.04 | g | 36.18 | m | 17.38 | b | 44.50 | d | |
2014 | 18.37 | d | 17.42 | d | 34.93 | c | 49.39 | g | 65.81 | e | 75.54 | d | 78.46 | c | 79.11 | c | 72.38 | d | 60.89 | c | 31.43 | g | 25.93 | b | 52.88 | b |
2015 | 23.96 | g | 17.50 | d | 43.96 | e | 60.00 | g | 65.44 | d | 77.92 | d | 83.68 | c | 78.04 | c | 76.72 | a | 62.14 | c | 45.24 | e | 28.41 | d | 57.91 | b |
2016 | 21.80 | f | 32.95 | j | 50.36 | c | 53.48 | c | 74.11 | d | 81.25 | f | 83.21 | b | 82.61 | 73.31 | a | 57.07 | d | 50.53 | 20.86 | c | 60.62 | c | ||
2017 | 20.78 | d | 31.44 | a | 38.60 | a | 56.20 | 67.10 | a | 82.25 | b | 86.77 | 77.81 | 73.07 | b | 61.05 | i | 37.25 | b | 26.61 | c | 54.35 | a | |||
2018 | 22.27 | e | 17.00 | d | 34.74 | d | 42.89 | b | 77.20 | a | 83.74 | c | 84.05 | j | 81.14 | b | 71.96 | b | 50.58 | g | 29.50 | l | 28.50 | u | 53.87 | d |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | 63.81 | e | 77.90 | a | 84.56 | d | 78.11 | c | ----- | z | ----- | z | ----- | z | ----- | z | 76.09 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.55 | 23.87 | 37.39 | 54.68 | 68.82 | 77.80 | 84.18 | 82.85 | 72.34 | 59.22 | 39.03 | 24.92 | 53.55 | |||||||||||||
S.D. | 7.87 | 7.27 | 6.51 | 5.74 | 5.03 | 4.43 | 4.08 | 3.75 | 4.25 | 4.38 | 5.60 | 5.86 | 2.42 | |||||||||||||
SKEW | 0.05 | -0.05 | 0.23 | -0.01 | 0.88 | 0.62 | 0.34 | 0.53 | -0.25 | -0.08 | -0.04 | 0.07 | 0.47 | |||||||||||||
MAX | 34.71 | 39.14 | 53.41 | 68.70 | 86.53 | 93.07 | 99.32 | 91.61 | 82.20 | 71.52 | 50.53 | 39.58 | 59.97 | |||||||||||||
MIN | 2.23 | 1.00 | 25.87 | 38.67 | 61.19 | 68.50 | 74.45 | 76.65 | 57.07 | 44.27 | 24.13 | 13.23 | 48.49 | |||||||||||||
YRS | 77 | 75 | 77 | 80 | 86 | 83 | 86 | 83 | 87 | 84 | 78 | 76 | 63 |