YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | 19.63 | a | 21.39 | 37.19 | 52.17 | 72.23 | 76.73 | 77.10 | 81.61 | 73.23 | 60.68 | 43.38 | a | 25.16 | 53.38 | |||||||||||
1923 | 24.84 | 17.22 | a | 30.39 | 51.97 | 67.63 | a | 79.77 | 84.65 | 76.80 | a | 72.07 | 55.74 | 45.50 | 36.06 | 53.55 | ||||||||||
1924 | 16.50 | a | 28.52 | 34.97 | 51.63 | 59.81 | 74.20 | 78.23 | 74.68 | 65.29 | b | 64.26 | 38.67 | 15.39 | 50.18 | |||||||||||
1925 | 20.68 | 27.57 | 40.19 | 62.20 | 65.87 | 74.00 | 77.03 | 81.71 | 73.63 | 43.81 | 38.87 | 20.40 | a | 52.16 | ||||||||||||
1926 | 20.60 | a | 29.15 | a | 29.52 | 51.97 | 72.19 | 71.71 | b | 80.10 | a | 74.90 | 62.53 | 52.26 | 32.97 | 21.23 | 49.93 | |||||||||
1927 | 17.97 | 29.11 | 41.71 | 53.93 | 61.52 | 71.57 | 76.32 | 75.68 | 70.63 | 58.26 | 35.00 | 13.57 | a | 50.44 | ||||||||||||
1928 | 21.55 | 27.39 | a | 38.13 | 46.93 | 68.32 | 69.55 | a | 79.06 | 77.97 | 65.60 | 55.87 | 42.30 | 30.97 | 51.97 | |||||||||||
1929 | 10.10 | a | 18.04 | a | 39.16 | 56.60 | 65.19 | 76.83 | a | 80.65 | h | 81.85 | d | 68.93 | b | 57.50 | a | 37.04 | d | 25.79 | b | 48.82 | a | |||
1930 | 14.10 | 33.11 | 41.06 | 59.37 | 66.55 | 76.90 | 85.52 | 85.23 | 73.03 | 53.90 | b | 48.33 | 30.57 | a | 55.64 | |||||||||||
1931 | 31.42 | 39.61 | 37.35 | 59.67 | 67.13 | a | 82.50 | 87.32 | 80.39 | 77.20 | 61.47 | a | 46.73 | 34.13 | 58.74 | |||||||||||
1932 | 25.94 | 27.62 | 29.35 | 54.10 | a | 68.20 | a | 81.27 | 85.93 | a | 83.71 | 70.80 | 53.77 | a | 37.30 | 24.03 | 53.50 | |||||||||
1933 | 30.54 | g | 20.61 | 35.87 | 53.33 | 66.61 | 86.93 | b | 87.55 | 82.42 | 75.97 | 52.61 | 34.03 | 24.07 | b | 56.36 | a | |||||||||
1934 | 25.74 | 22.59 | a | 34.77 | 51.93 | 79.03 | 81.40 | 84.87 | 77.97 | 64.47 | 58.55 | 42.83 | a | 22.50 | a | 53.89 | ||||||||||
1935 | 19.34 | b | 29.68 | 38.52 | 50.87 | 61.71 | 71.50 | 85.68 | 79.97 | a | 69.83 | 56.58 | 33.23 | 23.23 | 51.68 | |||||||||||
1936 | 12.19 | 8.28 | 34.23 | 45.50 | 72.97 | 75.41 | a | 92.81 | 84.42 | 75.93 | 55.00 | 36.73 | 28.48 | 51.83 | ||||||||||||
1937 | 15.94 | 21.68 | 33.71 | 49.60 | 68.16 | 74.70 | 84.55 | 84.84 | 72.17 | 53.00 | 37.43 | 23.32 | 51.59 | |||||||||||||
1938 | 19.27 | a | 28.29 | 45.97 | 55.03 | 63.61 | 75.53 | 78.06 | 79.97 | 69.63 | 62.19 | 36.37 | 23.74 | 53.14 | ||||||||||||
1939 | 25.16 | 19.61 | 35.26 | 48.97 | 73.45 | 75.65 | g | 82.00 | a | 76.63 | a | 72.71 | f | 55.67 | a | 43.88 | d | 34.94 | 49.56 | b | ||||||
1940 | 13.16 | 25.31 | 29.29 | 51.66 | a | 65.19 | 74.50 | 84.13 | a | 75.60 | a | 75.30 | 62.00 | ----- | z | 27.90 | 53.10 | a | ||||||||
1941 | 23.00 | 23.70 | a | 33.48 | 61.40 | 73.26 | 76.27 | 83.00 | 81.81 | 70.77 | 57.42 | 42.27 | 31.97 | 54.86 | ||||||||||||
1942 | 26.20 | a | 25.36 | 41.26 | 62.70 | 65.35 | 74.57 | 79.13 | 78.42 | 65.20 | 59.48 | 41.40 | 21.29 | 53.36 | ||||||||||||
1943 | 17.35 | 28.18 | 30.74 | 54.67 | 65.42 | 77.37 | 83.39 | 81.84 | 68.63 | 60.83 | a | 33.80 | 30.29 | 52.71 | ||||||||||||
1944 | 33.71 | 29.55 | 33.06 | 51.30 | 73.23 | 77.14 | a | 79.13 | 81.84 | 72.07 | a | 61.81 | 43.67 | 25.71 | 55.18 | |||||||||||
1945 | 19.26 | 27.13 | m | 48.13 | 52.60 | 60.35 | 69.67 | 78.06 | 79.19 | 69.47 | 55.91 | i | 38.27 | 21.53 | a | 53.65 | b | |||||||||
1946 | 24.16 | l | 23.15 | a | 50.26 | 60.03 | 66.26 | 75.90 | 80.48 | 78.90 | 69.70 | 60.84 | 40.67 | 27.65 | 57.62 | a | ||||||||||
1947 | 27.71 | 20.93 | 34.77 | 48.20 | 62.33 | a | 71.93 | 82.23 | 86.26 | 71.43 | 69.13 | 31.60 | 25.03 | 52.63 | ||||||||||||
1948 | 19.03 | a | 24.21 | a | 35.61 | 59.83 | 68.32 | 75.63 | 83.00 | 82.73 | a | 79.43 | 61.81 | 41.13 | 27.10 | 54.82 | ||||||||||
1949 | 24.32 | 24.43 | 36.68 | 57.30 | 72.93 | a | 81.33 | 84.00 | 82.32 | 68.00 | 61.71 | 44.00 | 28.29 | 55.44 | ||||||||||||
1950 | 19.48 | 25.54 | 30.32 | 43.77 | 65.32 | 78.50 | 80.68 | 77.87 | 71.30 | 63.03 | 36.27 | 20.16 | 51.02 | |||||||||||||
1951 | 18.81 | 25.14 | 30.52 | 49.13 | 71.45 | 72.97 | 79.81 | 74.87 | 65.43 | 56.61 | 32.77 | 23.42 | 50.08 | |||||||||||||
1952 | 23.26 | 30.45 | 32.55 | 59.53 | 68.48 | 78.57 | 81.84 | 76.84 | 73.07 | 55.71 | 43.62 | a | 29.13 | 54.42 | ||||||||||||
1953 | 25.16 | 25.75 | 37.13 | 49.27 | 69.61 | 78.60 | 80.52 | 81.00 | a | 72.53 | 68.65 | 47.67 | 29.52 | 55.45 | ||||||||||||
1954 | 19.23 | 37.43 | 35.61 | 56.63 | 60.39 | 78.53 | 81.48 | 78.16 | 68.03 | 54.74 | 44.00 | 28.74 | 53.58 | |||||||||||||
1955 | 21.23 | 23.75 | 35.19 | 63.70 | 73.70 | a | 76.90 | 87.39 | 85.87 | 73.50 | 60.77 | 33.70 | 21.13 | 54.74 | ||||||||||||
1956 | 23.32 | 24.69 | 34.00 | 51.37 | 68.71 | 81.50 | 77.71 | 79.29 | 70.17 | 67.32 | 41.07 | 29.68 | 54.07 | |||||||||||||
1957 | 17.74 | 27.68 | 38.45 | 56.83 | 68.87 | 76.43 | 84.35 | 79.58 | 69.07 | 57.00 | 38.63 | 31.19 | 53.82 | |||||||||||||
1958 | 27.13 | 23.39 | 39.65 | 58.63 | 72.29 | 72.80 | 78.26 | 81.43 | a | 73.38 | d | 63.13 | 44.00 | 23.58 | 54.81 | |||||||||||
1959 | 19.16 | 26.79 | 43.00 | 58.43 | 71.26 | 79.97 | a | 83.37 | d | 83.45 | 72.77 | 52.46 | c | 33.10 | 35.65 | 54.95 | ||||||||||
1960 | 23.68 | 27.66 | 32.35 | 57.00 | 68.52 | 75.13 | 83.74 | 83.45 | 73.24 | a | 61.48 | 44.33 | 26.87 | 54.79 | ||||||||||||
1961 | 25.16 | 35.82 | 42.13 | 49.47 | 67.52 | 79.70 | 81.39 | 83.00 | b | 70.80 | 62.77 | 41.20 | 25.16 | 55.34 | ||||||||||||
1962 | 18.71 | 22.43 | 36.38 | g | 54.78 | c | 70.68 | c | 76.60 | 78.40 | a | 80.55 | 68.67 | 62.61 | 43.33 | 26.96 | c | 54.88 | a | |||||||
1963 | 12.55 | 23.96 | 43.77 | 59.60 | 67.32 | 80.62 | a | 85.66 | b | 80.13 | a | 73.37 | 70.03 | 47.60 | 17.87 | 55.21 | ||||||||||
1964 | 28.61 | 34.21 | 36.63 | a | 58.27 | 73.06 | 79.59 | a | 86.78 | d | 79.61 | 68.37 | 58.29 | 43.17 | 22.65 | 55.77 | ||||||||||
1965 | 18.26 | 21.46 | 28.90 | a | 49.77 | 70.03 | 75.07 | 78.81 | 78.13 | 60.48 | a | 60.68 | 40.07 | 31.84 | 51.12 | |||||||||||
1966 | 11.74 | 25.25 | 43.19 | 49.52 | g | 66.13 | 78.90 | 85.84 | 78.23 | 71.77 | 58.37 | a | 39.07 | 26.10 | 53.14 | a | ||||||||||
1967 | 25.16 | 20.86 | 39.48 | 55.03 | 64.35 | 77.33 | 80.26 | 78.00 | 72.67 | 57.29 | 38.10 | 30.03 | 53.21 | |||||||||||||
1968 | 22.84 | 24.41 | 50.23 | 60.57 | 65.06 | 77.07 | 81.19 | 80.42 | 70.63 | 60.45 | 40.00 | 22.50 | c | 54.61 | ||||||||||||
1969 | 15.48 | 25.74 | a | 33.42 | 56.27 | 68.71 | 68.40 | 79.32 | 84.71 | 71.20 | 52.77 | 38.53 | 26.58 | 51.76 | ||||||||||||
1970 | 12.10 | 25.25 | 33.19 | 54.27 | 65.47 | a | 78.43 | 83.63 | a | 81.10 | a | 68.50 | 57.06 | 37.28 | a | 24.58 | 51.74 | |||||||||
1971 | 13.94 | 22.50 | 32.81 | 55.80 | 64.39 | 79.00 | 77.06 | 77.23 | 70.20 | 61.23 | 40.77 | 25.16 | 51.67 | |||||||||||||
1972 | 14.55 | 19.52 | 32.35 | 48.20 | 71.55 | 75.57 | 77.39 | 77.29 | 66.63 | 51.61 | 35.70 | 18.55 | 49.08 | |||||||||||||
1973 | 23.42 | 27.36 | 45.61 | 51.80 | 60.94 | 76.73 | 81.39 | 80.35 | 67.97 | 62.65 | 40.71 | b | 22.61 | 53.46 | ||||||||||||
1974 | 19.77 | 24.89 | 35.48 | 53.70 | 63.23 | 73.23 | 84.90 | 76.97 | 64.97 | 57.90 | 40.70 | 29.97 | 52.14 | |||||||||||||
1975 | 22.58 | 24.25 | 30.71 | 46.00 | 70.42 | 74.87 | 84.13 | 78.74 | 65.87 | 60.77 | 46.55 | a | 24.13 | 52.42 | ||||||||||||
1976 | 18.13 | 32.62 | 36.68 | 59.70 | 67.55 | 81.40 | 85.81 | 82.77 | 71.07 | 52.39 | 35.40 | 18.65 | 53.51 | |||||||||||||
1977 | 7.10 | a | 27.78 | a | 44.23 | 61.30 | 77.84 | 76.47 | 82.42 | 74.84 | 72.75 | r | 59.50 | w | 40.10 | a | 20.94 | 51.30 | b | |||||||
1978 | 14.65 | 20.21 | 37.03 | 52.47 | 62.55 | k | 73.20 | 77.94 | 79.03 | 74.93 | 57.65 | 39.57 | 21.55 | 49.84 | a | |||||||||||
1979 | 9.16 | 17.79 | 34.03 | 50.03 | 62.10 | 74.80 | 80.29 | 74.71 | 71.57 | 54.58 | 37.80 | 31.03 | a | 49.82 | ||||||||||||
1980 | 19.39 | 23.14 | 33.00 | 57.67 | 71.87 | 75.40 | 82.19 | 77.87 | 66.40 | 52.26 | 42.37 | 24.90 | 52.20 | |||||||||||||
1981 | 26.39 | 29.25 | 43.52 | 56.40 | 65.87 | 74.67 | 79.65 | 77.16 | 69.17 | 53.06 | 45.73 | 24.19 | 53.75 | |||||||||||||
1982 | 9.21 | b | 22.70 | a | 33.81 | 49.93 | 70.68 | 72.20 | 82.94 | 78.61 | 67.23 | 56.97 | 36.20 | 30.57 | a | 50.92 | ||||||||||
1983 | 25.35 | 30.79 | 38.60 | a | 48.73 | 62.10 | 75.23 | 84.32 | 83.35 | 69.73 | 56.77 | 38.73 | 13.20 | a | 52.24 | |||||||||||
1984 | 20.03 | 34.17 | 33.10 | 57.20 | 64.67 | a | 77.57 | 81.32 | 82.55 | 67.37 | 58.13 | 39.62 | a | 25.39 | 53.43 | |||||||||||
1985 | 17.77 | 24.86 | 43.68 | 58.97 | 71.52 | 72.63 | 81.13 | 74.30 | a | 68.03 | 55.29 | 31.77 | 15.94 | 51.32 | ||||||||||||
1986 | 22.81 | 22.21 | 39.97 | 59.10 | a | 69.03 | 78.34 | a | 80.47 | a | 74.87 | 67.03 | 56.74 | 35.00 | 28.19 | 52.81 | ||||||||||
1987 | 26.16 | 37.36 | 45.27 | a | 64.37 | 72.00 | 82.86 | a | 83.10 | 77.10 | 71.43 | 51.23 | 44.37 | 29.19 | 57.04 | |||||||||||
1988 | 17.03 | 21.21 | 38.97 | 56.23 | 75.55 | 83.43 | 86.94 | 82.81 | 70.17 | 52.03 | 37.73 | 25.20 | a | 53.94 | ||||||||||||
1989 | 27.19 | 17.37 | a | 32.58 | 52.03 | 66.43 | a | 74.37 | 83.23 | 78.58 | 70.30 | 60.13 | 34.63 | 16.65 | 51.12 | |||||||||||
1990 | 31.35 | 29.11 | 42.39 | 55.97 | a | 64.62 | b | 77.40 | 78.81 | 78.77 | 71.83 | 56.23 | 45.03 | 24.35 | 54.66 | |||||||||||
1991 | 18.32 | 31.46 | 37.50 | k | 64.58 | k | 68.27 | p | 79.09 | h | 78.44 | d | 80.20 | a | 65.36 | b | 55.23 | 30.87 | 27.30 | a | 48.40 | d | ||||
1992 | 25.52 | 32.34 | 38.68 | 48.70 | 70.45 | 73.77 | 73.77 | 74.94 | 67.90 | 55.71 | 34.80 | 26.97 | 51.96 | |||||||||||||
1993 | 22.35 | 24.14 | 36.97 | 51.60 | 65.39 | 71.77 | 77.13 | 79.06 | 61.36 | b | 55.52 | 35.18 | b | 26.39 | 50.57 | |||||||||||
1994 | 11.35 | 19.25 | 40.90 | 54.90 | 70.42 | 78.37 | 78.77 | 77.68 | 72.82 | b | 59.86 | c | 45.44 | c | 30.48 | 53.35 | ||||||||||
1995 | 22.52 | 25.57 | 41.65 | 48.93 | 65.48 | 80.43 | 79.90 | 80.58 | 67.93 | a | 54.65 | 29.83 | 22.16 | 51.64 | ||||||||||||
1996 | 17.27 | a | 23.34 | 31.39 | 51.00 | 66.03 | 76.67 | 78.68 | 81.00 | 69.47 | 58.00 | 30.77 | 21.55 | 50.43 | ||||||||||||
1997 | 18.13 | 28.68 | 36.55 | 53.00 | 61.90 | 79.67 | 77.58 | 75.03 | 70.70 | 57.32 | 34.30 | 32.06 | 52.08 | |||||||||||||
1998 | 24.06 | 38.00 | 38.84 | 60.27 | 75.35 | 72.33 | 81.26 | 80.16 | 76.73 | 59.68 | 43.17 | 32.84 | 56.89 | |||||||||||||
1999 | 18.10 | 34.39 | 42.45 | 56.43 | 69.45 | 74.83 | 83.58 | 76.97 | 69.73 | 57.87 | 49.33 | 30.52 | 55.31 | |||||||||||||
2000 | 22.29 | 33.17 | 48.42 | 54.33 | 68.77 | a | 74.70 | 79.84 | 79.26 | 70.10 | 59.58 | 36.87 | 13.81 | 53.43 | ||||||||||||
2001 | 25.03 | 21.00 | 35.39 | 55.17 | 67.30 | a | 75.33 | 82.84 | 81.35 | 68.53 | 56.19 | 52.87 | 33.81 | 54.57 | ||||||||||||
2002 | 29.87 | 33.96 | 30.55 | 52.27 | 61.68 | 76.60 | 83.52 | 77.29 | 72.33 | 49.26 | 38.40 | 30.52 | 53.02 | |||||||||||||
2003 | 19.68 | 21.75 | 36.26 | 52.20 | 66.26 | 75.00 | a | 81.35 | 81.94 | 71.37 | 53.90 | 34.50 | 26.87 | 51.76 | ||||||||||||
2004 | 14.19 | 25.31 | 38.26 | 54.27 | 63.06 | 72.53 | 75.71 | 71.58 | 81.67 | x | 55.80 | p | 43.67 | 27.55 | 48.61 | b | ||||||||||
2005 | 20.87 | 32.39 | 38.71 | 60.57 | 62.16 | 80.53 | 82.94 | 80.06 | 75.10 | 61.10 | 43.67 | 24.90 | 55.25 | |||||||||||||
2006 | 33.90 | 26.39 | 40.48 | 62.67 | 68.84 | 79.37 | 83.23 | 71.68 | 60.67 | 49.19 | 39.30 | 30.06 | 53.81 | |||||||||||||
2007 | 18.94 | 14.15 | a | 38.81 | 49.20 | 63.03 | 70.59 | a | 77.10 | a | 78.61 | 72.67 | 60.52 | 40.53 | 22.26 | 50.53 | ||||||||||
2008 | 20.00 | 23.34 | 36.00 | a | 50.77 | 64.68 | 74.87 | 81.42 | 79.68 | 71.57 | 56.74 | 40.63 | 21.74 | 51.79 | ||||||||||||
2009 | 14.97 | 27.89 | 38.68 | 55.03 | 68.10 | 74.50 | 75.19 | d | 77.28 | b | 74.93 | 48.06 | 48.57 | 22.35 | 52.13 | |||||||||||
2010 | 19.61 | 28.89 | 48.74 | 63.63 | 68.77 | 74.67 | 81.55 | 81.77 | 66.13 | 61.16 | 40.60 | 20.42 | 54.66 | |||||||||||||
2011 | 16.81 | 25.25 | 35.48 | 52.03 | 64.58 | 74.27 | 83.90 | 79.16 | 69.17 | 61.94 | 43.97 | 29.55 | 53.01 | |||||||||||||
2012 | 26.74 | 33.55 | 55.10 | 56.63 | 69.39 | 77.60 | 83.97 | 77.84 | 71.07 | 51.65 | 42.33 | 28.61 | 56.21 | |||||||||||||
2013 | 22.48 | 23.82 | 30.35 | 40.43 | 62.52 | 71.88 | n | 78.61 | c | 81.16 | 74.23 | 55.03 | 37.93 | 18.00 | 47.69 | a | ||||||||||
2014 | 14.94 | 16.21 | 30.48 | 47.90 | 65.19 | 77.47 | 77.77 | 78.29 | 69.07 | 56.06 | 31.37 | 28.35 | 49.43 | |||||||||||||
2015 | 22.48 | 18.00 | 42.03 | 57.53 | 67.26 | 75.70 | 79.68 | 75.97 | 75.17 | 58.39 | 47.57 | 34.13 | 54.49 | |||||||||||||
2016 | 21.00 | 29.10 | 45.42 | 53.53 | 68.68 | 77.03 | 81.48 | 79.52 | 71.03 | 59.23 | 50.43 | 24.77 | 55.10 | |||||||||||||
2017 | 24.94 | 36.07 | 39.61 | 56.37 | 64.16 | 77.03 | 80.29 | 74.77 | 73.20 | 58.35 | 38.23 | 22.97 | 53.83 | |||||||||||||
2018 | 20.32 | 22.82 | 38.74 | 44.73 | 76.48 | 77.57 | 80.97 | 79.39 | 70.73 | 50.58 | 31.93 | 29.42 | 51.97 | |||||||||||||
2019 | 19.55 | 20.11 | 35.61 | 51.97 | 61.55 | 76.60 | 81.39 | 76.65 | 70.67 | 51.97 | 33.60 | 28.19 | 50.65 | |||||||||||||
2020 | 27.81 | 29.72 | 42.19 | 51.40 | 65.13 | 79.40 | 82.39 | 79.90 | 68.17 | 48.71 | 46.40 | 30.26 | 54.29 | |||||||||||||
2021 | 25.58 | 18.00 | 47.06 | 54.33 | 66.29 | 83.60 | 83.23 | 79.68 | 73.30 | 61.32 | 41.20 | 29.26 | 55.24 | |||||||||||||
2022 | 16.00 | 22.50 | 36.61 | 46.03 | 67.42 | 78.50 | 81.71 | 78.48 | 72.27 | 58.23 | 41.13 | 22.19 | 51.76 | |||||||||||||
2023 | 25.19 | 27.64 | 35.35 | 50.53 | 71.29 | 82.27 | 81.16 | 80.16 | 74.37 | 58.19 | 42.87 | 36.68 | 55.48 | |||||||||||||
2024 | 24.16 | 39.93 | 44.29 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.13 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.64 | 25.97 | 37.82 | 54.12 | 67.59 | 76.56 | 81.48 | 79.32 | 70.30 | 57.52 | 39.86 | 25.83 | 53.16 | |||||||||||||
S.D. | 5.39 | 5.70 | 5.39 | 4.85 | 4.10 | 3.37 | 3.19 | 2.97 | 3.51 | 4.56 | 4.95 | 5.06 | 1.91 | |||||||||||||
SKEW | -0.05 | 0.15 | 0.61 | -0.07 | 0.35 | 0.23 | 0.34 | -0.06 | -0.39 | 0.02 | 0.11 | -0.26 | 0.11 | |||||||||||||
MAX | 33.90 | 39.93 | 55.10 | 64.37 | 79.03 | 86.93 | 92.81 | 86.26 | 79.43 | 70.03 | 52.87 | 36.68 | 58.74 | |||||||||||||
MIN | 7.10 | 8.28 | 28.90 | 40.43 | 59.81 | 68.40 | 73.77 | 71.58 | 60.48 | 43.81 | 29.83 | 13.20 | 49.08 | |||||||||||||
YRS | 101 | 102 | 101 | 100 | 100 | 99 | 101 | 102 | 99 | 99 | 101 | 102 | 89 |