YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1926 | 31.52 | 28.70 | a | 32.26 | 44.37 | 58.55 | 66.20 | 75.90 | 74.23 | 66.07 | 54.81 | 46.50 | 30.42 | 50.79 | ||||||||||||
1927 | 29.84 | 35.14 | 43.84 | 50.50 | 58.87 | 67.97 | 74.68 | 71.19 | 69.83 | 61.10 | 49.70 | 36.42 | 54.09 | |||||||||||||
1928 | 33.90 | a | 31.31 | 36.94 | 48.60 | 60.39 | 68.37 | 77.39 | 77.77 | 66.40 | 60.16 | 46.73 | 38.77 | 53.89 | ||||||||||||
1929 | 31.29 | 29.43 | 45.87 | 52.20 | 61.58 | 71.40 | 77.94 | 73.26 | 71.13 | 55.87 | 44.67 | 32.61 | 53.94 | |||||||||||||
1930 | 32.45 | 34.93 | 38.06 | 48.73 | 63.65 | 75.57 | 76.29 | 76.61 | 72.20 | 56.55 | 48.20 | 33.48 | 54.73 | |||||||||||||
1931 | 30.84 | 33.61 | 38.90 | 53.23 | 63.81 | 71.83 | 80.55 | 76.68 | 74.80 | 62.94 | 55.23 | 40.29 | 56.89 | |||||||||||||
1932 | 41.58 | 35.59 | 34.42 | 45.87 | 63.06 | 72.03 | 74.71 | 78.06 | 70.27 | 61.16 | 44.03 | 39.90 | 55.06 | |||||||||||||
1933 | 41.03 | 35.57 | 36.16 | 53.67 | 65.77 | 75.53 | 80.10 | 76.00 | 70.20 | 56.97 | 40.30 | 32.68 | 55.33 | |||||||||||||
1934 | 31.42 | 20.07 | 37.61 | 51.03 | 66.45 | 75.10 | 79.00 | 73.52 | 72.60 | 55.42 | 49.50 | 31.68 | 53.62 | |||||||||||||
1935 | 28.19 | 29.96 | 42.00 | 49.40 | 56.61 | 72.50 | 80.97 | 77.35 | 66.87 | 59.71 | 47.47 | 28.19 | 53.27 | |||||||||||||
1936 | 27.65 | 25.24 | 42.55 | 47.70 | 67.00 | 73.13 | 78.06 | 76.68 | 70.40 | 58.77 | 42.77 | 38.81 | 54.06 | |||||||||||||
1937 | 39.26 | 34.89 | 33.26 | 50.07 | 63.77 | 72.33 | 79.32 | 80.74 | 68.63 | 55.97 | 46.13 | 33.48 | 54.82 | |||||||||||||
1938 | 30.45 | 34.86 | 45.94 | 54.13 | 61.65 | 75.10 | 78.58 | 80.58 | 65.47 | 60.13 | 50.70 | 36.81 | 56.20 | |||||||||||||
1939 | 32.00 | 34.64 | 36.19 | 47.63 | 64.87 | 72.10 | 78.71 | 79.81 | 71.87 | 60.03 | 43.43 | 35.84 | 54.76 | |||||||||||||
1940 | 23.41 | b | 29.55 | 31.97 | 46.37 | 62.84 | 70.67 | 76.71 | 75.74 | 66.60 | 56.13 | 45.07 | 37.61 | 51.89 | ||||||||||||
1941 | 29.16 | 29.39 | 32.68 | 56.87 | 64.35 | 75.10 | 79.71 | 74.29 | 73.33 | 59.39 | 49.50 | 38.19 | 55.16 | |||||||||||||
1942 | 31.16 | 27.36 | 41.55 | 55.20 | 65.87 | 72.60 | 77.19 | 76.06 | 70.50 | 59.97 | 46.60 | 30.06 | 54.51 | |||||||||||||
1943 | 27.16 | 33.89 | 38.03 | 43.87 | 60.48 | 76.10 | 78.26 | 75.32 | 67.83 | 55.45 | 43.97 | 32.48 | 52.74 | |||||||||||||
1944 | 34.45 | 32.14 | 35.84 | 45.40 | 68.77 | 72.50 | 79.71 | 80.42 | 69.47 | 58.06 | 46.07 | 31.42 | 54.52 | |||||||||||||
1945 | 23.94 | 31.86 | 51.23 | 57.80 | 56.55 | 70.03 | 77.32 | 76.29 | 71.37 | 57.71 | 46.97 | 30.06 | 54.26 | |||||||||||||
1946 | 33.48 | 30.57 | 51.06 | 50.67 | 62.19 | 71.83 | 77.74 | 73.16 | 72.33 | 65.32 | 50.30 | 38.13 | 56.40 | |||||||||||||
1947 | 35.35 | 27.89 | 36.16 | 50.77 | 61.94 | 71.07 | 77.20 | a | 80.87 | 71.77 | 67.23 | 43.50 | 33.06 | 54.73 | ||||||||||||
1948 | 25.71 | 30.69 | 41.58 | 55.10 | 58.45 | 70.67 | 78.68 | 77.23 | 71.77 | 56.39 | 52.90 | 37.58 | 54.73 | |||||||||||||
1949 | 36.20 | a | 38.44 | a | 41.20 | a | 51.33 | 65.68 | 79.73 | 80.19 | 79.58 | 67.00 | 64.65 | 43.72 | a | 38.55 | 57.19 | |||||||||
1950 | 41.03 | 29.86 | 34.97 | 47.50 | 63.58 | 74.13 | 75.71 | 75.65 | 65.20 | 61.16 | 47.60 | 32.94 | 54.11 | |||||||||||||
1951 | 34.68 | 32.75 | 40.84 | 50.87 | 63.65 | 72.53 | 76.74 | 74.77 | 68.83 | 62.42 | 41.70 | 37.48 | 54.77 | |||||||||||||
1952 | 34.61 | 34.21 | 38.03 | 54.50 | 59.52 | 73.53 | 82.42 | 77.35 | 71.93 | 55.48 | 49.28 | a | 37.94 | 55.73 | ||||||||||||
1953 | 37.10 | 36.07 | 44.48 | 49.57 | 62.93 | a | 76.70 | 78.87 | 77.23 | 71.37 | 61.94 | 51.40 | 43.03 | 57.56 | ||||||||||||
1954 | 30.55 | 39.79 | 40.77 | a | 55.45 | a | 62.71 | 72.83 | 75.81 | 73.90 | 67.77 | 61.57 | a | 47.28 | a | 34.77 | e | 55.27 | ||||||||
1955 | 28.90 | b | 33.71 | d | 39.52 | b | 54.86 | a | 67.76 | b | 72.07 | 83.10 | 82.10 | b | 73.15 | c | 61.83 | a | 44.27 | d | 30.00 | e | 55.94 | |||
1956 | 28.46 | e | 33.48 | b | 34.72 | b | 46.48 | a | 60.43 | a | 71.90 | a | 73.42 | 75.71 | 67.66 | a | 63.30 | a | 49.96 | d | 41.52 | f | 55.05 | a | ||
1957 | 26.28 | b | 37.00 | b | 40.48 | b | 54.76 | a | 61.71 | c | 77.66 | a | ----- | z | 75.97 | a | 70.70 | 60.41 | b | 48.56 | c | 40.32 | c | 53.99 | a | |
1958 | 31.18 | c | 28.00 | b | 37.77 | 54.37 | c | 61.93 | b | 69.90 | 76.19 | 77.31 | b | 69.64 | b | 59.66 | b | 48.38 | a | 29.13 | a | 53.62 | ||||
1959 | 31.41 | d | 32.32 | c | 37.41 | b | 53.17 | 66.93 | c | 71.43 | b | 80.32 | 80.74 | 76.03 | a | 58.83 | a | 45.67 | c | 36.79 | b | 55.92 | ||||
1960 | 31.57 | a | 33.91 | f | 32.00 | 53.43 | 65.07 | b | 72.31 | a | 74.39 | 76.20 | a | 71.63 | 58.40 | a | 52.04 | d | 32.68 | f | 58.70 | b | ||||
1961 | 26.21 | b | 35.52 | a | 40.59 | b | 46.07 | 62.11 | d | 70.63 | 77.10 | 76.00 | 77.93 | a | 63.67 | a | 47.75 | f | 36.65 | 55.68 | a | |||||
1962 | 31.84 | 30.46 | d | 39.37 | a | 49.67 | 68.23 | a | 71.77 | 75.33 | a | 76.03 | 67.34 | a | 58.81 | 43.10 | 34.87 | 53.90 | ||||||||
1963 | 29.16 | 27.43 | 40.52 | 50.50 | 60.03 | 71.60 | 77.52 | 73.06 | 65.97 | 65.65 | 51.87 | 27.06 | 53.36 | |||||||||||||
1964 | 31.84 | 29.10 | 39.60 | a | 51.87 | 65.74 | 70.57 | 78.61 | 73.77 | 70.43 | 56.97 | 48.20 | 35.39 | 54.34 | ||||||||||||
1965 | 27.94 | 31.71 | 34.23 | 44.37 | 66.47 | a | 70.30 | 75.74 | 76.97 | 71.53 | 57.26 | 46.87 | 38.94 | 53.53 | ||||||||||||
1966 | 29.90 | 32.89 | 44.00 | 48.20 | 58.81 | 72.93 | 79.03 | 75.90 | 66.80 | 59.13 | 51.93 | 35.81 | 54.61 | |||||||||||||
1967 | 38.32 | 30.61 | 38.71 | 52.00 | a | 54.77 | 76.73 | 75.77 | 76.58 | 70.40 | 60.35 | 43.33 | 36.13 | 54.48 | ||||||||||||
1968 | 24.68 | 26.45 | 40.68 | 54.90 | 55.66 | b | 68.17 | 79.16 | 75.58 | e | 73.13 | 62.81 | 43.60 | 33.17 | a | 53.16 | ||||||||||
1969 | 31.67 | a | 30.71 | 37.19 | 56.10 | 65.13 | 75.30 | 79.00 | 80.90 | 71.90 | 60.00 | 46.30 | 29.90 | 55.34 | ||||||||||||
1970 | 23.94 | 32.07 | 36.65 | 55.07 | 68.26 | 75.30 | 80.39 | 79.68 | 71.93 | 61.29 | 48.50 | 31.68 | 55.40 | |||||||||||||
1971 | 27.65 | 32.93 | 35.23 | 48.90 | 63.13 | 75.53 | 79.32 | 76.87 | 74.03 | 64.65 | 45.13 | 38.61 | 55.17 | |||||||||||||
1972 | 33.65 | 28.83 | 35.55 | 47.53 | 66.55 | 71.47 | 79.00 | 75.32 | 72.00 | 54.42 | 41.57 | 35.55 | 53.45 | |||||||||||||
1973 | 35.16 | 29.54 | 48.97 | 54.90 | 62.29 | 77.87 | 81.68 | 81.13 | 70.43 | 61.10 | 46.80 | 36.19 | 57.17 | |||||||||||||
1974 | 31.43 | a | 29.46 | 39.68 | 58.00 | 61.81 | 74.62 | a | 79.20 | a | 78.94 | 68.30 | 55.90 | 46.73 | 35.58 | 54.97 | ||||||||||
1975 | 35.87 | 32.89 | 37.13 | 45.97 | 70.68 | 76.13 | 81.42 | 77.61 | 65.83 | 61.35 | 53.13 | 33.97 | 56.00 | |||||||||||||
1976 | 26.13 | 39.72 | 45.94 | 54.63 | 62.87 | 77.97 | 75.81 | 75.74 | 68.93 | a | 53.35 | 40.77 | 31.26 | 54.43 | ||||||||||||
1977 | 22.26 | 30.46 | 45.97 | 56.57 | 69.23 | 70.67 | 80.68 | 77.20 | a | 67.97 | 55.68 | 47.90 | 32.23 | 54.73 | ||||||||||||
1978 | 26.45 | 23.96 | 34.71 | 48.33 | 65.90 | 75.60 | 79.94 | 79.52 | 69.20 | 57.10 | 46.83 | 34.84 | 53.53 | |||||||||||||
1979 | 28.10 | 21.32 | 45.16 | 50.80 | 65.77 | 76.13 | 80.74 | 75.83 | a | 71.23 | 57.48 | 50.27 | 38.94 | 55.15 | ||||||||||||
1980 | 31.00 | 26.83 | 39.61 | 53.07 | 66.26 | 71.30 | 78.77 | 79.39 | 71.47 | 55.55 | 43.60 | 30.68 | 53.96 | |||||||||||||
1981 | 23.68 | 40.07 | 41.19 | 56.33 | 65.97 | 75.43 | 79.10 | 78.16 | 66.13 | 55.55 | 45.73 | 34.10 | 55.12 | |||||||||||||
1982 | 25.37 | a | 31.32 | 41.16 | 53.40 | 67.19 | 70.23 | 80.42 | 75.06 | 70.83 | 61.77 | 50.23 | 43.90 | 55.91 | ||||||||||||
1983 | 32.16 | 35.93 | 42.65 | 50.53 | 63.90 | b | 77.53 | 82.68 | 79.19 | 74.10 | 60.71 | 46.40 | 30.10 | 56.32 | ||||||||||||
1984 | 26.77 | 39.66 | 34.06 | 52.67 | 61.29 | 76.80 | 79.16 | 79.07 | a | 69.00 | 62.94 | 48.40 | 41.40 | a | 55.93 | |||||||||||
1985 | 27.97 | a | 33.15 | a | 43.74 | 56.07 | 67.65 | 71.07 | 80.16 | 78.55 | 73.70 | 60.90 | 46.03 | 30.90 | 55.82 | |||||||||||
1986 | 31.29 | 29.07 | a | 45.87 | 56.70 | 67.42 | 73.60 | 79.10 | 76.00 | 68.40 | 57.87 | 45.00 | 37.00 | 55.61 | ||||||||||||
1987 | 30.61 | 30.64 | 47.30 | a | 59.13 | 70.71 | 78.17 | 83.23 | 78.97 | 69.72 | a | 57.48 | 49.50 | 38.13 | 57.80 | |||||||||||
1988 | 31.90 | 32.66 | 42.58 | 52.73 | 68.23 | a | 74.70 | 83.55 | 82.06 | 71.23 | 54.42 | 49.47 | 36.19 | 56.64 | ||||||||||||
1989 | 36.68 | 30.04 | 40.29 | 50.63 | 64.26 | 74.60 | 80.97 | 77.48 | 71.33 | 61.13 | 46.27 | 23.74 | 54.78 | |||||||||||||
1990 | 39.48 | 38.18 | 45.42 | 56.70 | 61.90 | 76.43 | 79.97 | 78.97 | 70.70 | 60.03 | 51.33 | 40.32 | 58.29 | |||||||||||||
1991 | 30.84 | 37.32 | 43.29 | 57.90 | 70.87 | 78.43 | 81.55 | 80.58 | 71.63 | 62.48 | 46.30 | 37.81 | 58.25 | |||||||||||||
1992 | 32.26 | 33.90 | 37.65 | 50.33 | 66.39 | 72.37 | 72.67 | a | 75.29 | 71.13 | 54.94 | 44.57 | 36.84 | 54.03 | ||||||||||||
1993 | 33.39 | 28.29 | 36.26 | 54.13 | 65.03 | 73.47 | 81.16 | 80.61 | 68.07 | 57.48 | 45.70 | 34.29 | 54.82 | |||||||||||||
1994 | 22.10 | 28.36 | 37.52 | 57.60 | 61.16 | 76.50 | 81.48 | 77.42 | 69.63 | 59.61 | 52.30 | 39.16 | 55.24 | |||||||||||||
1995 | 35.94 | 29.86 | 44.68 | 49.10 | 63.45 | 78.63 | 82.03 | 82.48 | 69.17 | 62.68 | 41.23 | 29.97 | 55.77 | |||||||||||||
1996 | 29.42 | 30.59 | 37.94 | 50.00 | a | 62.45 | 74.17 | 77.90 | 79.74 | 70.13 | 60.94 | 40.83 | 39.35 | 54.46 | ||||||||||||
1997 | 29.71 | 37.18 | 39.32 | 51.93 | 59.35 | 76.97 | 79.23 | a | 76.35 | 69.48 | a | 58.77 | 43.33 | 36.97 | 54.88 | |||||||||||
1998 | 35.48 | 37.96 | 45.42 | 55.20 | 71.84 | 75.14 | a | 79.74 | 79.32 | 73.45 | a | 60.16 | 47.97 | 44.29 | 58.83 | |||||||||||
1999 | 29.68 | 37.57 | 38.26 | 53.00 | 69.68 | 80.50 | 83.74 | 78.03 | 75.63 | 60.26 | 54.28 | a | 38.74 | 58.28 | ||||||||||||
2000 | 31.16 | 36.72 | 48.74 | 50.80 | 66.84 | 73.90 | 76.65 | 77.47 | a | 71.10 | 60.33 | a | 44.17 | 29.29 | 55.60 | |||||||||||
2001 | 32.00 | 34.96 | 37.00 | 56.20 | 68.13 | 75.50 | 77.93 | a | 82.03 | 71.60 | 61.81 | 56.13 | 42.19 | 57.96 | ||||||||||||
2002 | 38.06 | 41.50 | 44.37 | a | 54.69 | a | 60.65 | 75.87 | 82.16 | 81.16 | 76.80 | 55.68 | 44.70 | 34.61 | 57.52 | |||||||||||
2003 | 25.19 | 28.29 | 42.39 | 50.10 | 62.20 | a | 72.17 | 79.48 | 80.23 | 72.20 | 56.16 | 49.20 | 36.81 | 54.53 | ||||||||||||
2004 | 22.45 | 31.45 | 43.65 | 50.23 | 67.06 | 72.28 | a | 76.10 | 75.65 | 71.80 | 58.06 | 47.20 | 35.13 | 54.25 | ||||||||||||
2005 | 28.19 | 32.79 | 36.06 | 53.73 | 60.39 | 80.80 | 83.16 | 80.71 | 74.03 | 57.61 | 50.60 | 31.00 | 55.76 | |||||||||||||
2006 | 39.39 | 33.11 | 40.20 | a | 54.67 | 66.39 | 73.27 | 82.32 | 76.97 | 67.50 | 55.45 | 49.83 | a | 42.06 | 56.76 | |||||||||||
2007 | 33.10 | b | 25.61 | 39.23 | 48.67 | 66.58 | 77.37 | 77.71 | 79.74 | 74.53 | 66.19 | 44.93 | 34.13 | 55.65 | ||||||||||||
2008 | 35.45 | 31.10 | 37.48 | 60.66 | a | 62.58 | 77.53 | 79.39 | 76.52 | 71.77 | 55.65 | 43.47 | 34.55 | 55.51 | ||||||||||||
2009 | 25.32 | 34.82 | 42.61 | 55.27 | 66.87 | 69.67 | 75.29 | 78.84 | 69.20 | 55.42 | 52.37 | 34.71 | 55.03 | |||||||||||||
2010 | 30.00 | 31.96 | 46.06 | 60.77 | 70.10 | 74.20 | 81.68 | 80.03 | a | 71.70 | 58.48 | 47.50 | 31.58 | 57.01 | ||||||||||||
2011 | 27.90 | 32.57 | 39.16 | 54.90 | 67.03 | 75.37 | 82.84 | 79.03 | 73.17 | 58.71 | 55.13 | 41.58 | 57.28 | |||||||||||||
2012 | 37.55 | 38.07 | 54.61 | 53.47 | 71.58 | 75.27 | 82.45 | 80.68 | 71.57 | 61.58 | 45.87 | 40.39 | 59.42 | |||||||||||||
2013 | 35.55 | 32.61 | 39.10 | 55.83 | 69.45 | 72.17 | 80.65 | 76.13 | 70.93 | 60.58 | 45.10 | 34.87 | 56.08 | |||||||||||||
2014 | 27.87 | 27.96 | 35.00 | 55.27 | 65.90 | 76.07 | 76.52 | 75.52 | 71.13 | 62.10 | 44.97 | 37.81 | 54.68 | |||||||||||||
2015 | 27.81 | 22.14 | 36.06 | 53.83 | 71.84 | 72.40 | 77.94 | 77.03 | 74.83 | 56.68 | 53.33 | 47.19 | 55.92 | |||||||||||||
2016 | 34.48 | 37.24 | 47.58 | 49.23 | 64.71 | 74.33 | 80.81 | 82.35 | 73.53 | 61.00 | 50.67 | 36.52 | 57.70 | |||||||||||||
2017 | 35.45 | 41.18 | 38.03 | 58.23 | 64.48 | 74.60 | 78.81 | 77.48 | 72.70 | 66.19 | 47.07 | 31.77 | 57.17 | |||||||||||||
2018 | 30.84 | 40.46 | 38.26 | 46.33 | 72.19 | 74.47 | 82.16 | 80.42 | 73.97 | 57.19 | 40.73 | 37.65 | 56.22 | |||||||||||||
2019 | 29.29 | 33.82 | 40.19 | 53.10 | 60.26 | 72.07 | 81.61 | 76.74 | 71.47 | 60.57 | a | 44.78 | c | 40.39 | h | 56.72 | a | |||||||||
2020 | 40.83 | g | 39.14 | g | 48.20 | a | 50.37 | 63.19 | d | 75.77 | 81.94 | 79.74 | 72.07 | 60.32 | 55.60 | 40.13 | 62.73 | b | ||||||||
2021 | 33.84 | 32.61 | 50.52 | 56.90 | 65.35 | 79.03 | 76.65 | 79.71 | 73.03 | 64.19 | 47.77 | 43.90 | 58.63 | |||||||||||||
2022 | 30.32 | 37.46 | 47.06 | 56.37 | 69.71 | 74.87 | 79.26 | 80.48 | 70.50 | 62.29 | 52.43 | 39.26 | 58.33 | |||||||||||||
2023 | 37.87 | 40.75 | 41.48 | 60.40 | 64.48 | 71.97 | 80.10 | 75.84 | 72.13 | 62.94 | 48.00 | 44.61 | 58.38 | |||||||||||||
2024 | 34.35 | 42.72 | 48.00 | 56.75 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.69 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.21 | 32.57 | 40.52 | 52.42 | 64.45 | 73.88 | 79.05 | 77.70 | 70.78 | 59.52 | 47.35 | 35.80 | 55.43 | |||||||||||||
S.D. | 4.47 | 4.51 | 4.77 | 3.90 | 3.78 | 2.87 | 2.45 | 2.44 | 2.60 | 3.08 | 3.63 | 4.31 | 1.61 | |||||||||||||
SKEW | 0.15 | -0.11 | 0.51 | -0.13 | -0.13 | 0.04 | -0.22 | -0.05 | -0.02 | 0.22 | 0.32 | 0.02 | 0.23 | |||||||||||||
MAX | 41.58 | 42.72 | 54.61 | 60.77 | 72.19 | 80.80 | 83.74 | 82.48 | 77.93 | 67.23 | 56.13 | 47.19 | 59.42 | |||||||||||||
MIN | 22.10 | 20.07 | 31.97 | 43.87 | 54.77 | 66.20 | 72.67 | 71.19 | 65.20 | 53.35 | 40.30 | 23.74 | 50.79 | |||||||||||||
YRS | 98 | 97 | 99 | 98 | 98 | 98 | 97 | 98 | 98 | 98 | 97 | 95 | 92 |