YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 82.94 | 64.79 | a | 60.81 | 43.47 | 18.77 | 54.16 | g | ||||
1935 | 6.59 | b | 31.15 | a | 33.26 | 49.57 | 65.87 | 73.57 | 85.68 | 79.52 | 68.10 | a | 56.71 | 26.62 | a | 18.93 | a | 49.63 | ||||||||
1936 | -0.13 | a | -2.89 | a | 32.10 | 45.77 | 78.61 | 80.13 | 94.86 | c | 80.90 | a | 68.50 | b | 55.48 | b | 30.12 | n | 25.40 | a | 50.79 | a | ||||
1937 | -1.68 | 16.50 | 32.10 | 43.41 | a | 71.32 | 82.12 | m | 81.42 | 84.31 | b | 73.77 | 52.61 | ----- | z | ----- | z | 50.42 | c | |||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.40 | ----- | z | ----- | z | ----- | z | ----- | z | 32.14 | a | 24.33 | a | 43.29 | i | |
1939 | 18.39 | 6.26 | a | 32.40 | a | 52.50 | 72.97 | a | 74.10 | 88.48 | 84.77 | 71.59 | a | 49.33 | a | 47.23 | 33.35 | 52.61 | ||||||||
1940 | 15.48 | d | 23.90 | 29.35 | 45.93 | 68.13 | a | 74.77 | 83.58 | 80.48 | 76.72 | a | 61.45 | 29.80 | 26.53 | a | 51.34 | |||||||||
1941 | 17.19 | 17.54 | 30.30 | a | 52.67 | 69.97 | a | 77.13 | 85.32 | 80.06 | 66.30 | 55.35 | 34.97 | 26.77 | 51.13 | |||||||||||
1942 | 25.77 | 20.70 | a | 37.16 | 52.93 | a | 63.10 | 72.38 | a | 80.39 | 78.32 | 65.80 | 60.97 | 34.77 | 15.16 | 50.62 | ||||||||||
1943 | 4.43 | a | 21.86 | 25.71 | 53.83 | 62.23 | a | 71.60 | 85.74 | 82.29 | 68.17 | 63.42 | 35.40 | 30.17 | a | 50.40 | ||||||||||
1944 | 29.61 | 21.43 | a | 27.52 | d | 54.17 | 71.57 | a | 73.45 | a | 82.58 | 77.94 | 67.00 | 61.33 | a | 34.43 | 23.89 | c | 52.08 | |||||||
1945 | 17.14 | b | 25.40 | c | 44.77 | a | 44.96 | b | 57.29 | c | 72.25 | b | 80.19 | 81.23 | a | 64.70 | 55.84 | 28.11 | b | 14.25 | c | 48.84 | ||||
1946 | 17.65 | e | 14.50 | 42.86 | b | ----- | z | 64.00 | 76.83 | 83.65 | 79.26 | 69.10 | a | 50.87 | 35.63 | 18.61 | 50.27 | a | ||||||||
1947 | 23.00 | a | 15.77 | b | 32.37 | a | 50.07 | 61.74 | 69.97 | 82.71 | 81.97 | a | 66.80 | 60.77 | 27.73 | 18.65 | 49.30 | |||||||||
1948 | 14.12 | f | 16.24 | 24.52 | d | 46.22 | c | 68.45 | b | 74.48 | e | 79.26 | 83.23 | 79.33 | 61.42 | 36.10 | 18.23 | 53.41 | a | |||||||
1949 | 10.35 | 9.56 | a | 30.55 | 59.70 | 72.74 | 78.77 | 83.10 | 86.35 | 71.87 | 55.03 | 42.87 | 16.90 | 51.48 | ||||||||||||
1950 | -2.65 | 16.11 | 29.06 | 39.37 | 60.45 | 78.17 | 78.87 | 77.00 | 71.37 | 56.68 | 28.97 | a | 15.14 | b | 45.71 | |||||||||||
1951 | 12.20 | a | 19.32 | 23.38 | e | 46.74 | k | 73.90 | 74.30 | 83.97 | 76.57 | a | 64.20 | 51.17 | b | 29.30 | ----- | z | 50.83 | b | ||||||
1952 | ----- | z | ----- | z | ----- | z | 81.93 | p | 71.06 | 79.37 | 83.83 | a | 81.81 | 76.03 | 56.55 | 40.87 | 26.94 | 64.56 | d | |||||||
1953 | 17.55 | 23.32 | 33.86 | c | 49.83 | 66.65 | 76.07 | a | 80.45 | 83.42 | 69.60 | 64.42 | 43.00 | 26.10 | 52.86 | |||||||||||
1954 | 5.16 | 35.46 | 33.72 | b | 49.34 | a | 61.97 | 74.97 | 82.17 | a | 78.10 | 65.73 | 56.10 | a | 41.77 | 27.97 | 51.04 | |||||||||
1955 | 13.90 | 14.27 | b | 23.03 | 60.93 | 70.37 | a | 76.07 | a | 84.55 | 86.06 | 70.67 | 58.13 | 24.31 | a | 10.93 | a | 49.44 | ||||||||
1956 | 13.71 | 16.90 | 27.26 | 41.90 | a | 66.07 | a | 81.83 | 78.00 | 80.00 | 66.13 | 63.06 | 38.14 | a | 21.63 | a | 49.55 | |||||||||
1957 | ----- | z | 19.89 | a | 35.06 | 52.31 | a | 70.87 | 72.67 | 85.84 | 78.52 | 65.67 | 54.73 | a | 35.14 | a | 27.83 | a | 54.41 | a | ||||||
1958 | 25.97 | 20.89 | 39.37 | a | 58.47 | 73.90 | 73.87 | 79.10 | 80.81 | 70.57 | 59.06 | 35.67 | 14.52 | 52.68 | ||||||||||||
1959 | 7.42 | 16.70 | a | 35.48 | 53.23 | 64.84 | 79.60 | 83.97 | 83.61 | 69.23 | 44.81 | 26.30 | 30.03 | 49.60 | ||||||||||||
1960 | 15.06 | 20.45 | 25.74 | 49.13 | 70.32 | 76.70 | 86.29 | 84.94 | 74.50 | 58.87 | 35.97 | 20.13 | 51.51 | |||||||||||||
1961 | 16.32 | 26.44 | a | 38.52 | 47.83 | 69.77 | 85.30 | 81.68 | 89.13 | 66.13 | 59.06 | 39.97 | 13.06 | 52.77 | ||||||||||||
1962 | 12.06 | 11.57 | 28.13 | 47.37 | 63.52 | 77.27 | 79.13 | 81.52 | 68.77 | 62.74 | 39.30 | 23.23 | 49.55 | |||||||||||||
1963 | 10.19 | 20.50 | 42.87 | 55.43 | 67.26 | 79.57 | 83.87 | 81.71 | 76.30 | 69.52 | 42.80 | 16.00 | 53.83 | |||||||||||||
1964 | 22.06 | 27.07 | 29.35 | 53.40 | 72.87 | 74.47 | 82.77 | 75.81 | 68.62 | a | 59.23 | 38.34 | a | 11.58 | 51.30 | |||||||||||
1965 | 9.80 | a | 20.89 | a | 23.97 | 48.63 | 66.53 | a | 76.67 | 79.83 | a | 80.23 | 58.93 | 59.68 | 31.70 | 26.55 | 48.62 | |||||||||
1966 | -0.80 | a | 14.96 | 35.74 | 45.93 | 64.10 | 77.60 | 82.84 | 78.65 | 73.47 | 55.97 | 28.37 | 17.81 | 47.89 | ||||||||||||
1967 | 15.48 | 14.50 | 32.94 | 46.86 | a | 62.61 | 76.87 | 83.23 | 83.45 | 76.03 | 53.77 | 36.00 | 21.16 | 50.24 | ||||||||||||
1968 | 13.68 | 17.24 | 40.97 | 55.13 | 64.13 | 74.45 | a | 79.84 | 74.32 | 69.97 | 56.03 | 38.07 | 16.23 | 50.00 | ||||||||||||
1969 | 3.84 | 18.07 | 26.35 | 55.00 | 70.13 | 68.43 | 78.68 | 86.87 | 70.63 | 47.39 | 37.67 | 23.70 | a | 48.90 | ||||||||||||
1970 | 8.57 | a | 20.46 | 24.29 | 44.50 | 62.87 | 80.77 | 83.71 | 82.16 | 70.83 | a | 57.23 | 33.23 | 15.32 | 48.66 | |||||||||||
1971 | 4.77 | 22.36 | 32.29 | 52.00 | 69.00 | 77.00 | 76.13 | 81.97 | 69.53 | 56.48 | 31.77 | 19.16 | 49.37 | |||||||||||||
1972 | 10.42 | 13.10 | 30.87 | 49.10 | a | 73.58 | 79.50 | 78.74 | 82.77 | 65.80 | 51.58 | 29.90 | 11.81 | 48.10 | ||||||||||||
1973 | 22.52 | 25.43 | 42.03 | 53.40 | 69.39 | 78.33 | 79.06 | 82.81 | 67.70 | 60.23 | 29.20 | 15.00 | 52.09 | |||||||||||||
1974 | 6.38 | b | 19.50 | 27.03 | 48.60 | 60.68 | 79.17 | 85.93 | a | 74.97 | a | 66.87 | 59.23 | 35.57 | 27.71 | 49.30 | ||||||||||
1975 | 19.81 | 18.18 | 27.71 | 44.77 | 68.81 | 75.70 | 82.84 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.49 | f | ||||||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.00 | n | 82.35 | 75.33 | 53.16 | 37.00 | 14.35 | 52.44 | g | |||||
1977 | 8.58 | 27.41 | a | 42.13 | 64.80 | 78.97 | 80.57 | w | 80.26 | 73.42 | 63.47 | 58.71 | 34.13 | 10.48 | 49.31 | a | ||||||||||
1978 | 4.10 | 11.52 | a | 29.81 | 48.97 | 72.42 | 76.37 | 79.16 | 78.77 | 72.13 | 56.06 | 31.00 | 14.81 | 47.93 | ||||||||||||
1979 | 2.74 | 2.36 | 25.10 | 37.53 | 56.74 | 74.50 | 80.32 | 75.13 | 69.37 | 53.06 | 32.83 | 27.61 | 44.78 | |||||||||||||
1980 | 11.94 | 15.86 | 26.90 | 61.80 | 76.68 | 76.37 | 80.87 | 74.03 | 64.40 | 50.35 | 41.23 | 19.03 | 49.96 | |||||||||||||
1981 | 22.23 | 24.96 | 40.45 | 54.83 | 66.16 | 72.53 | 79.87 | 80.45 | 68.80 | 51.00 | 44.70 | 18.81 | 52.07 | |||||||||||||
1982 | -1.90 | 18.11 | 29.42 | 48.43 | 66.94 | 68.03 | 78.48 | 75.42 | 68.60 | 51.35 | 30.47 | 24.32 | 46.47 | |||||||||||||
1983 | 22.53 | a | 23.46 | 29.23 | 47.20 | 62.52 | 75.77 | 84.00 | 86.32 | 67.57 | 52.00 | 35.57 | 6.29 | 49.37 | ||||||||||||
1984 | 17.77 | 31.93 | 28.68 | 55.73 | 64.35 | 74.40 | 80.84 | 84.52 | 64.53 | 53.71 | 32.53 | 13.06 | 50.17 | |||||||||||||
1985 | 14.39 | 14.71 | 37.61 | 57.60 | 71.61 | 67.77 | 78.58 | 71.55 | 61.53 | 53.03 | 22.17 | 11.00 | a | 46.80 | ||||||||||||
1986 | 19.90 | 16.21 | 38.23 | 50.60 | 70.26 | 76.10 | 78.32 | 76.42 | 64.00 | 54.39 | 28.76 | a | 25.52 | 49.89 | ||||||||||||
1987 | 21.61 | 30.11 | 30.61 | 61.97 | 71.87 | 79.63 | 78.45 | 76.55 | 70.80 | 51.19 | 41.73 | 26.61 | 53.43 | |||||||||||||
1988 | 12.37 | a | 17.14 | 34.13 | 57.30 | 72.94 | 85.63 | 84.19 | 82.52 | 66.07 | 53.77 | 33.23 | 23.69 | b | 51.91 | |||||||||||
1989 | 16.48 | 10.75 | 22.87 | 47.24 | a | 71.00 | 73.53 | 85.26 | 80.97 | 70.10 | 57.32 | 29.77 | 11.06 | 48.03 | ||||||||||||
1990 | 24.42 | 19.25 | 33.65 | 50.57 | 64.68 | 75.50 | 77.61 | 80.58 | 71.93 | 55.87 | 37.80 | 15.90 | 50.65 | |||||||||||||
1991 | 11.06 | 27.29 | 34.58 | 57.97 | 67.61 | 77.13 | 77.23 | 82.68 | 66.87 | 46.55 | 25.77 | 23.70 | a | 49.87 | ||||||||||||
1992 | 23.94 | 24.03 | 34.39 | 43.93 | 69.55 | 70.50 | 69.45 | 73.90 | 65.10 | 55.35 | 30.10 | 12.68 | 47.74 | |||||||||||||
1993 | 12.29 | 17.54 | 32.32 | 52.62 | a | 66.71 | 69.63 | 71.35 | 74.23 | 62.57 | 51.32 | 30.87 | 19.71 | 46.76 | ||||||||||||
1994 | -1.10 | a | 9.96 | 37.23 | 52.70 | 70.00 | 74.03 | 74.55 | 75.94 | 70.93 | 55.61 | 39.00 | 22.58 | 48.45 | ||||||||||||
1995 | 12.81 | 17.43 | 27.90 | 43.53 | 62.84 | 81.10 | 76.61 | 78.61 | 67.67 | 49.97 | 25.07 | b | 13.29 | 46.40 | ||||||||||||
1996 | 3.47 | a | 14.79 | 21.97 | 38.33 | 61.65 | 75.53 | 75.03 | 79.06 | 67.20 | 52.58 | 20.20 | 9.03 | 43.24 | ||||||||||||
1997 | 6.68 | 21.14 | 25.23 | 41.03 | ----- | z | 78.87 | ----- | z | 76.55 | 70.63 | 50.52 | ----- | z | 30.19 | 44.54 | c | |||||||||
1998 | 10.77 | 27.61 | 27.97 | a | 57.03 | 68.48 | 67.57 | 77.39 | 79.74 | 72.53 | 51.97 | 32.37 | 21.10 | 49.54 | ||||||||||||
1999 | 7.06 | 24.75 | 33.94 | 51.87 | 63.23 | 70.77 | 76.55 | 74.94 | 63.47 | 50.94 | 45.17 | 30.32 | 49.42 | |||||||||||||
2000 | 14.61 | 30.21 | 42.90 | 52.17 | 67.10 | 68.50 | 77.52 | 77.26 | 64.17 | 55.45 | 30.50 | 4.03 | 48.70 | |||||||||||||
2001 | 19.94 | 9.57 | 30.71 | 47.57 | 65.90 | 71.40 | 77.00 | 79.13 | 67.73 | 49.26 | 43.70 | 22.90 | 48.73 | |||||||||||||
2002 | 18.42 | 27.71 | 22.32 | 46.53 | 58.29 | 74.30 | 79.71 | 73.94 | 67.27 | 40.71 | 31.20 | 25.55 | 47.16 | |||||||||||||
2003 | 15.10 | 11.82 | 27.39 | 52.47 | 65.16 | 72.40 | 78.26 | 81.65 | 68.13 | 58.52 | 28.97 | 25.55 | 48.78 | |||||||||||||
2004 | 5.03 | 22.31 | 33.29 | 49.97 | 58.03 | 69.23 | 75.52 | 69.55 | 68.57 | 53.03 | 44.47 | 21.68 | 47.56 | |||||||||||||
2005 | 9.90 | 20.32 | 28.68 | 56.87 | 60.29 | 72.67 | 79.26 | 77.19 | 72.53 | 55.16 | 37.20 | 22.87 | 49.41 | |||||||||||||
2006 | 26.90 | 16.46 | 28.13 | 58.70 | 66.71 | 78.03 | 84.94 | 79.77 | 69.33 | 49.90 | 34.83 | 26.26 | 51.66 | |||||||||||||
2007 | 19.58 | 9.50 | 33.48 | 50.63 | 66.48 | 75.00 | 81.58 | 75.84 | 69.10 | 55.94 | 36.37 | 15.52 | 49.08 | |||||||||||||
2008 | 13.47 | a | 12.69 | 28.84 | 49.97 | 63.35 | 73.37 | 77.16 | 78.81 | 67.57 | 54.97 | 33.90 | 8.77 | 46.90 | ||||||||||||
2009 | 8.13 | 17.00 | 25.32 | 45.10 | 60.06 | 72.37 | 74.37 | a | 73.97 | 75.17 | 45.35 | 46.10 | 13.55 | 46.37 | ||||||||||||
2010 | 14.26 | 15.61 | 38.32 | 61.10 | 64.00 | 71.28 | a | 79.81 | 79.35 | 62.33 | 60.06 | 34.23 | 14.26 | 49.55 | ||||||||||||
2011 | 8.16 | 17.50 | 26.10 | 49.07 | 60.87 | 70.87 | 80.83 | a | 79.57 | c | 70.10 | 59.19 | 39.80 | 28.42 | 49.21 | |||||||||||
2012 | 23.42 | 27.97 | 44.23 | 55.87 | 67.13 | 75.45 | a | 82.61 | 80.19 | 70.63 | 48.03 | 29.70 | 15.65 | 51.74 | ||||||||||||
2013 | 13.61 | 16.11 | 21.87 | 35.17 | 62.71 | 73.83 | 77.16 | 77.87 | 70.93 | 50.45 | 32.93 | 6.26 | 44.91 | |||||||||||||
2014 | 9.74 | 9.18 | 22.60 | a | 42.69 | d | 62.39 | 73.03 | 75.74 | 76.68 | 69.28 | a | 55.34 | b | 27.23 | 20.22 | d | 45.34 | ||||||||
2015 | 18.87 | a | 10.89 | 37.42 | 54.83 | 64.79 | b | 74.13 | 79.32 | 78.24 | b | 72.90 | 57.32 | 39.10 | 25.74 | d | 51.13 | |||||||||
2016 | 16.37 | a | 24.55 | 38.83 | a | 45.61 | b | 68.88 | f | 73.00 | 76.00 | 78.10 | b | 67.73 | 52.90 | 47.14 | a | 17.81 | 48.91 | a | ||||||
2017 | 17.40 | a | 24.04 | b | 27.90 | a | 51.03 | 65.87 | a | 75.43 | 78.90 | 76.81 | 68.53 | 56.79 | b | 30.03 | 19.52 | 49.35 | ||||||||
2018 | 16.77 | 14.43 | 32.03 | 44.73 | 73.76 | b | 78.50 | 80.29 | 80.32 | 64.07 | 45.31 | b | 24.90 | 22.77 | 48.16 | |||||||||||
2019 | 9.84 | 2.86 | 28.19 | 50.37 | 62.29 | 75.00 | 80.68 | 77.32 | 66.27 | 44.10 | 30.55 | a | 19.45 | 45.58 | ||||||||||||
2020 | 16.43 | a | 20.11 | a | 33.37 | a | 45.33 | 64.00 | 77.97 | 80.68 | 77.94 | 68.17 | 46.83 | a | 37.90 | a | 29.42 | 49.84 | ||||||||
2021 | 23.87 | 11.46 | 46.16 | 51.73 | 65.71 | 81.33 | 84.61 | 78.06 | 74.28 | a | 58.53 | a | 36.23 | 21.20 | a | 52.77 | ||||||||||
2022 | 10.55 | 10.18 | 28.37 | a | 37.30 | 62.32 | 76.17 | 78.23 | 76.81 | 70.13 | 55.81 | 33.17 | 12.87 | 45.99 | ||||||||||||
2023 | 17.00 | 17.25 | 21.26 | 38.90 | 72.21 | b | 81.64 | b | 77.26 | 77.39 | 72.23 | 53.39 | 36.10 | 32.29 | 49.74 | |||||||||||
2024 | 16.48 | 30.79 | 32.74 | 55.06 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.67 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.36 | 18.51 | 31.60 | 50.14 | 66.83 | 75.28 | 80.49 | 79.40 | 68.85 | 54.83 | 34.51 | 19.85 | 49.36 | |||||||||||||
S.D. | 7.35 | 6.97 | 6.05 | 6.13 | 4.80 | 3.73 | 3.83 | 3.67 | 3.76 | 5.02 | 5.94 | 6.60 | 2.22 | |||||||||||||
SKEW | -0.18 | -0.19 | 0.45 | -0.08 | 0.22 | 0.22 | 0.34 | 0.06 | 0.22 | -0.14 | 0.11 | -0.13 | -0.33 | |||||||||||||
MAX | 29.61 | 35.46 | 46.16 | 64.80 | 78.97 | 85.63 | 94.86 | 89.13 | 79.33 | 69.52 | 47.23 | 33.35 | 53.83 | |||||||||||||
MIN | -2.65 | -2.89 | 21.26 | 35.17 | 56.74 | 67.57 | 69.45 | 69.55 | 58.93 | 40.71 | 20.20 | 4.03 | 43.24 | |||||||||||||
YRS | 85 | 87 | 87 | 84 | 85 | 86 | 85 | 88 | 88 | 88 | 86 | 87 | 76 |