YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | 29.32 | 36.12 | a | 48.84 | c | 50.00 | 63.94 | 64.22 | 76.31 | 69.94 | 62.45 | 53.35 | 42.18 | 33.18 | 52.49 | |||||||||||
1929 | 21.98 | 24.29 | 47.18 | 49.40 | a | 59.97 | a | 64.12 | a | 72.29 | 74.18 | 59.83 | a | 54.20 | f | 36.86 | b | 37.45 | 49.78 | a | ||||||
1930 | 14.10 | 43.27 | 48.14 | i | 55.13 | 57.60 | 64.14 | a | 72.06 | d | 72.88 | c | 64.82 | 49.92 | a | 39.85 | 32.19 | 51.45 | a | |||||||
1931 | 37.35 | 37.78 | a | 46.13 | 53.92 | 65.93 | a | 65.87 | 74.61 | 72.77 | 63.68 | 52.76 | b | 37.47 | a | 33.15 | 53.45 | |||||||||
1932 | 33.52 | 36.97 | 45.65 | 54.43 | 59.42 | a | 69.78 | a | ----- | z | 70.95 | 64.37 | 54.19 | 46.67 | 31.37 | 51.57 | a | |||||||||
1933 | 37.43 | a | 30.98 | 44.66 | 52.55 | 56.08 | 67.82 | 74.27 | 72.82 | 60.96 | b | 55.66 | b | 42.88 | 44.27 | a | 53.37 | |||||||||
1934 | 43.77 | 43.36 | 52.45 | 60.43 | a | 63.65 | 68.08 | 74.03 | 73.77 | 62.47 | a | 55.53 | a | 47.81 | a | 38.58 | a | 57.00 | ||||||||
1935 | 37.93 | b | 38.77 | 43.32 | 48.97 | 59.65 | 67.65 | 72.79 | 71.21 | 66.33 | 50.77 | 36.12 | 32.72 | a | 52.19 | |||||||||||
1936 | 37.07 | a | 20.72 | 45.10 | 56.45 | 65.05 | 68.68 | 75.27 | 73.42 | 63.05 | 57.19 | 36.14 | a | 40.40 | 53.21 | |||||||||||
1937 | 16.80 | a | 34.84 | 47.40 | a | 51.78 | 61.73 | a | 68.05 | a | 76.44 | 69.52 | 67.68 | 58.23 | 45.78 | 39.16 | 53.12 | |||||||||
1938 | 36.90 | 37.12 | 47.00 | j | 55.17 | 61.66 | b | 69.84 | a | 79.55 | 69.81 | 68.35 | 53.97 | 38.00 | 37.16 | 55.23 | a | |||||||||
1939 | 39.37 | 35.77 | 46.05 | 54.55 | 61.32 | 64.58 | 74.13 | a | 74.65 | 66.07 | 54.06 | 40.98 | 40.93 | a | 54.37 | |||||||||||
1940 | 31.93 | a | 40.95 | 51.32 | a | 55.47 | 65.40 | 71.97 | 75.06 | 74.24 | 67.03 | 57.68 | 37.33 | 35.98 | 55.36 | |||||||||||
1941 | 33.60 | 40.61 | a | 50.39 | 55.55 | 59.47 | a | 65.62 | 77.89 | 72.19 | 61.90 | 52.23 | a | 44.79 | a | 38.62 | a | 54.40 | ||||||||
1942 | 22.89 | 38.38 | 47.56 | 56.38 | 58.62 | a | 64.63 | 75.68 | 74.52 | 67.05 | 55.93 | a | 40.92 | 38.60 | 53.43 | |||||||||||
1943 | 26.81 | 37.61 | 43.68 | 55.95 | 56.74 | 63.68 | 74.23 | 71.03 | 67.37 | d | 55.02 | 40.70 | 33.66 | 52.21 | ||||||||||||
1944 | 34.23 | 39.24 | 46.55 | j | 53.82 | 61.10 | 66.52 | 74.84 | 71.63 | 68.32 | 57.50 | 40.76 | a | 32.65 | 54.60 | a | ||||||||||
1945 | 38.13 | 41.98 | 45.42 | 50.87 | 61.21 | 66.27 | 76.43 | a | 73.85 | 62.63 | 57.02 | 43.20 | 34.58 | 54.30 | ||||||||||||
1946 | 39.11 | 42.89 | 46.63 | 53.90 | 61.21 | 65.20 | 73.79 | 72.92 | 62.82 | 51.08 | 40.40 | 38.90 | 54.07 | |||||||||||||
1947 | 32.47 | 41.59 | 50.13 | 55.90 | 66.18 | 65.80 | 72.78 | a | 70.66 | 65.47 | 55.55 | a | 43.18 | 38.40 | 54.84 | |||||||||||
1948 | 34.31 | 37.24 | 42.84 | c | 50.20 | 56.92 | 69.50 | 70.26 | 69.66 | 63.00 | 51.42 | 43.14 | a | 32.07 | b | 51.71 | ||||||||||
1949 | 17.37 | 34.95 | 45.27 | 58.07 | b | 64.42 | 67.25 | 72.61 | 71.77 | 65.82 | 50.19 | 47.17 | 38.15 | 52.75 | ||||||||||||
1950 | 17.29 | 35.04 | 44.73 | 51.55 | 59.65 | 65.65 | 74.52 | 72.79 | n | 66.47 | 53.61 | 43.32 | 41.52 | 50.30 | a | |||||||||||
1951 | 36.43 | b | 39.39 | 42.92 | 54.87 | 62.95 | 67.58 | 74.48 | 71.37 | a | 64.90 | 51.94 | 40.74 | m | ----- | z | 56.68 | b | ||||||||
1952 | ----- | z | ----- | z | 51.29 | x | 56.58 | 62.35 | 66.33 | 75.82 | 74.24 | 67.62 | 58.95 | 36.02 | 42.08 | r | 62.24 | d | ||||||||
1953 | ----- | z | ----- | z | ----- | z | 54.70 | y | 57.84 | 61.52 | 74.00 | 72.10 | a | 66.80 | 55.74 | 46.07 | b | 42.79 | 59.61 | d | ||||||
1954 | 34.52 | a | 40.57 | a | 43.73 | 52.13 | 60.98 | 58.50 | l | 72.44 | w | 69.10 | b | 62.72 | c | 50.61 | d | 47.92 | e | 36.55 | 49.88 | b | ||||
1955 | 34.86 | c | 37.31 | l | 41.95 | 48.29 | b | 57.45 | a | 68.35 | 71.53 | a | 72.24 | 64.44 | d | 55.31 | m | 34.76 | c | 35.14 | c | 52.90 | b | |||
1956 | 36.29 | e | 28.58 | c | 45.89 | c | 54.22 | e | 63.53 | a | 65.04 | b | 77.07 | i | 73.43 | b | 65.88 | d | ----- | z | 39.33 | c | 39.43 | b | 51.16 | b |
1957 | 21.50 | b | 38.64 | 46.38 | c | 54.34 | b | 63.44 | 68.66 | a | 71.92 | a | 69.97 | a | 67.89 | c | 50.87 | d | 42.59 | a | 42.35 | u | 54.20 | a | ||
1958 | ----- | z | ----- | z | 45.02 | 52.05 | 67.00 | 71.22 | 77.74 | 77.68 | 64.88 | 55.32 | a | 44.17 | a | 39.58 | 59.47 | b | ||||||||
1959 | 36.77 | 40.46 | 48.16 | 54.37 | 58.02 | 67.67 | 75.27 | 70.34 | 62.72 | 55.08 | 39.10 | 34.94 | 53.57 | |||||||||||||
1960 | 26.47 | 40.45 | 46.18 | 54.14 | a | 58.39 | 68.52 | a | 78.56 | 70.03 | 65.12 | 55.06 | 44.48 | a | 31.39 | 53.23 | ||||||||||
1961 | 39.23 | a | 47.96 | 49.18 | 53.12 | 59.47 | b | 72.58 | 77.08 | 77.03 | 62.07 | a | 52.71 | 37.15 | 38.19 | 55.48 | ||||||||||
1962 | 33.18 | 39.93 | 44.44 | 56.63 | 55.98 | 66.67 | 73.95 | 70.58 | 65.28 | 53.71 | 47.08 | 40.44 | 53.99 | |||||||||||||
1963 | 29.74 | 41.27 | 48.31 | 50.87 | 60.55 | 68.17 | 70.52 | 73.03 | 68.68 | 57.10 | 46.10 | 33.63 | 54.00 | |||||||||||||
1964 | 42.19 | 43.21 | 45.63 | 51.77 | 58.73 | 65.98 | 71.97 | 68.53 | 62.42 | 52.11 | 42.05 | 33.34 | 53.16 | |||||||||||||
1965 | 37.58 | 44.16 | 43.90 | 55.88 | 59.16 | 66.80 | 73.84 | 72.23 | 61.22 | 57.42 | 45.83 | 36.83 | a | 54.57 | ||||||||||||
1966 | 39.02 | 41.91 | 47.53 | 54.09 | c | 62.56 | 66.28 | 69.55 | t | 71.62 | b | 70.06 | v | 54.66 | c | 45.42 | 42.61 | 52.57 | b | |||||||
1967 | 45.31 | 45.04 | 46.69 | 48.48 | 59.94 | 70.32 | 76.12 | a | 78.27 | 69.93 | 56.03 | 42.30 | 37.69 | 56.34 | ||||||||||||
1968 | 39.94 | 43.62 | 49.66 | 52.47 | 60.26 | 67.72 | 76.05 | 69.68 | 64.50 | 51.42 | 43.75 | 34.11 | 54.43 | |||||||||||||
1969 | 23.82 | 35.96 | 46.18 | 52.15 | 63.05 | 70.98 | 72.60 | 70.44 | 65.42 | 49.63 | 44.10 | 36.45 | 52.56 | |||||||||||||
1970 | 34.42 | 42.02 | 45.66 | 49.07 | 61.00 | 69.77 | d | 75.47 | 72.79 | 59.27 | 50.35 | 42.43 | 37.10 | 53.28 | ||||||||||||
1971 | 41.53 | 41.68 | 43.81 | 51.37 | 61.00 | 63.22 | 74.39 | 75.71 | 58.32 | 50.02 | b | 43.98 | 36.61 | 53.47 | ||||||||||||
1972 | 33.89 | 38.28 | 49.40 | b | 49.75 | 61.81 | 68.10 | 72.60 | 73.98 | 60.88 | 51.85 | 43.17 | 29.61 | 52.78 | ||||||||||||
1973 | 32.56 | 39.30 | 48.79 | 53.43 | 62.16 | 67.33 | 74.26 | 72.48 | 64.10 | 53.63 | 42.20 | 42.16 | 54.37 | |||||||||||||
1974 | 31.11 | 44.82 | 47.76 | 51.98 | 56.96 | d | 70.50 | 73.92 | 73.87 | 66.58 | 54.18 | 44.40 | 41.18 | 54.77 | ||||||||||||
1975 | 36.48 | 36.43 | 43.13 | 47.40 | 58.98 | 65.50 | b | 77.16 | 69.61 | 64.17 | 54.89 | 43.20 | 39.85 | 53.07 | ||||||||||||
1976 | 38.87 | 40.14 | 44.16 | 50.00 | 61.10 | 63.88 | 73.68 | 69.23 | 67.28 | 52.73 | 42.62 | 35.06 | 53.23 | |||||||||||||
1977 | 26.16 | 42.39 | a | 45.84 | 57.10 | 56.60 | 71.38 | 72.48 | 77.32 | 61.68 | 51.95 | 42.20 | 38.02 | a | 53.59 | |||||||||||
1978 | 33.78 | a | 40.71 | 49.70 | a | 51.78 | 58.32 | 68.48 | 74.37 | 70.98 | 61.93 | 52.37 | 34.73 | 31.37 | a | 52.38 | ||||||||||
1979 | 15.79 | 38.44 | a | 47.19 | 52.10 | 61.71 | 68.15 | 74.79 | 72.94 | 66.57 | 56.00 | 35.07 | 41.11 | 52.49 | ||||||||||||
1980 | 27.92 | 36.66 | 44.81 | 56.07 | 59.44 | 63.08 | 73.31 | 66.88 | g | 64.21 | a | 51.60 | 43.57 | 40.50 | b | 51.01 | a | |||||||||
1981 | 37.90 | 39.71 | 47.68 | 52.45 | 58.39 | 63.57 | 71.89 | 76.48 | 65.48 | 52.15 | 44.23 | 37.44 | 53.95 | |||||||||||||
1982 | 34.53 | b | 39.79 | 45.39 | c | 49.85 | 59.10 | a | 69.50 | 72.29 | 72.27 | 61.08 | 51.88 | b | 38.23 | 36.65 | 52.55 | |||||||||
1983 | 41.73 | a | 43.89 | 48.79 | 51.92 | 62.27 | a | 64.63 | 69.82 | 73.81 | 59.62 | 51.68 | 46.03 | 25.71 | b | 53.32 | ||||||||||
1984 | 35.43 | a | 40.33 | 48.18 | a | 50.74 | a | 56.24 | 63.55 | 74.23 | 73.06 | 60.83 | 51.40 | 42.83 | a | 29.78 | d | 52.22 | ||||||||
1985 | 26.87 | 35.72 | c | 44.76 | 55.75 | 61.26 | 68.07 | a | 80.07 | b | 69.43 | a | 58.88 | 52.27 | 27.52 | a | 21.87 | 50.21 | ||||||||
1986 | 36.05 | a | 39.19 | a | 50.33 | a | 51.78 | 60.26 | 73.02 | a | 69.81 | 77.89 | 60.55 | 54.48 | 44.05 | b | 31.46 | c | 54.07 | |||||||
1987 | 31.54 | c | 40.30 | 48.60 | 57.33 | 63.47 | a | 69.68 | 71.31 | 71.71 | 67.55 | 54.47 | 44.95 | 35.43 | a | 54.69 | ||||||||||
1988 | 33.65 | 43.09 | a | 47.52 | a | 54.30 | 59.18 | 66.16 | a | 74.26 | 72.11 | 64.13 | 59.80 | a | 47.31 | a | 34.33 | a | 54.65 | |||||||
1989 | 40.44 | 26.94 | a | 46.17 | a | 55.95 | 59.13 | 69.43 | 72.68 | a | 70.37 | a | 64.98 | 54.05 | a | 46.65 | 35.03 | 53.49 | ||||||||
1990 | 40.92 | 39.66 | 48.00 | 57.57 | 58.47 | 67.07 | 76.81 | 75.21 | 71.15 | 53.58 | 48.55 | 27.26 | 55.35 | |||||||||||||
1991 | 32.79 | 46.18 | 44.66 | 53.27 | 57.52 | 63.70 | 74.44 | 76.90 | 67.57 | 53.90 | 42.28 | 39.13 | a | 54.36 | ||||||||||||
1992 | 40.33 | e | 44.76 | 50.84 | c | 56.61 | b | 64.91 | c | 73.46 | b | 72.68 | 73.74 | 61.92 | 54.95 | 41.48 | 34.08 | 55.81 | ||||||||
1993 | 26.39 | 30.59 | 44.28 | a | 53.36 | a | 64.88 | a | 65.63 | 67.90 | 70.16 | 65.68 | 55.65 | a | 36.88 | a | 37.07 | b | 51.54 | |||||||
1994 | 42.44 | 38.02 | b | 50.00 | 56.95 | 63.05 | c | 67.43 | 77.72 | a | 73.84 | 69.18 | 54.13 | a | 42.35 | 38.08 | a | 56.10 | ||||||||
1995 | 34.47 | b | 45.60 | b | 46.73 | 52.05 | 61.13 | 64.69 | a | 74.34 | 69.89 | 68.02 | b | 51.57 | c | 46.97 | 36.13 | a | 54.30 | |||||||
1996 | 35.39 | 34.21 | a | 45.65 | 54.77 | 56.43 | a | 66.07 | 77.18 | 73.43 | a | 63.45 | 54.86 | b | 40.72 | 36.12 | b | 53.19 | ||||||||
1997 | 35.42 | 40.82 | 48.43 | b | 51.62 | 63.24 | 65.64 | a | 72.42 | 74.97 | 64.88 | 52.56 | 42.70 | 36.86 | b | 54.13 | ||||||||||
1998 | 38.24 | 44.83 | a | 47.84 | 52.81 | a | 59.15 | 67.45 | 80.37 | 76.40 | 70.92 | 53.16 | 47.47 | 37.28 | a | 56.33 | ||||||||||
1999 | 43.40 | 43.67 | a | 47.06 | 51.10 | 57.76 | 65.68 | 72.82 | 75.44 | 64.08 | 52.55 | 48.32 | 40.22 | a | 55.17 | |||||||||||
2000 | 36.94 | 40.10 | 46.17 | a | 56.02 | a | 60.48 | 67.70 | 74.90 | 75.13 | 63.88 | 53.06 | 36.64 | a | 32.79 | 53.65 | ||||||||||
2001 | 34.79 | 37.93 | 47.79 | 51.71 | a | 63.35 | 65.55 | a | 75.31 | 78.42 | 72.02 | a | 55.66 | b | 45.34 | a | 39.97 | a | 55.65 | |||||||
2002 | 39.45 | c | 41.66 | c | 45.65 | a | 54.43 | a | 59.13 | a | 69.72 | 79.05 | b | 73.13 | 66.28 | 51.60 | 42.35 | 40.63 | 55.26 | |||||||
2003 | 41.57 | a | 41.05 | 51.66 | 52.23 | 60.03 | 70.28 | 79.23 | 76.23 | 68.90 | a | 58.91 | b | 38.60 | i | 37.94 | 58.00 | a | ||||||||
2004 | 29.67 | a | 40.38 | a | 50.92 | 54.83 | 60.65 | 67.77 | 77.53 | 76.45 | 64.70 | 56.48 | a | 44.22 | 38.93 | a | 55.21 | |||||||||
2005 | 34.82 | c | 39.32 | 50.21 | 54.30 | 62.40 | 66.07 | a | 76.48 | 75.87 | 64.63 | 55.22 | a | 41.07 | 30.44 | 54.24 | ||||||||||
2006 | 44.35 | 37.61 | 46.15 | 53.22 | 62.27 | 68.67 | 79.16 | 73.94 | 65.88 | 54.48 | 43.14 | a | 32.68 | 55.13 | ||||||||||||
2007 | 31.68 | 39.59 | a | 49.00 | a | 53.30 | 61.66 | 67.29 | d | 77.68 | 72.71 | 64.68 | 51.82 | a | 42.34 | a | 37.37 | 54.09 | ||||||||
2008 | 33.95 | a | 41.62 | a | 45.65 | 49.22 | 60.15 | a | 65.10 | 75.06 | 73.53 | 64.55 | 54.05 | a | 44.77 | 31.69 | b | 53.28 | ||||||||
2009 | 34.60 | a | 37.68 | 42.78 | b | 53.45 | b | 60.10 | a | 69.35 | 77.13 | a | 74.94 | 68.13 | 50.38 | a | 45.44 | c | 27.64 | c | 53.47 | |||||
2010 | 39.74 | f | 42.79 | d | 47.73 | c | 51.66 | a | 57.14 | c | 65.12 | 75.35 | a | 73.29 | 65.65 | 54.58 | 40.95 | 35.47 | 55.43 | a | ||||||
2011 | 37.74 | 37.82 | 46.87 | 47.27 | 55.79 | 64.62 | 72.13 | 76.13 | 69.32 | 55.60 | 43.58 | 34.21 | 53.42 | |||||||||||||
2012 | 37.35 | 38.41 | 46.35 | 54.33 | 59.71 | 64.15 | 74.63 | 75.92 | 67.35 | 54.63 | 43.97 | 39.65 | 54.70 | |||||||||||||
2013 | 32.53 | 42.11 | 48.65 | 53.28 | a | 62.15 | 67.47 | a | 78.55 | a | 76.26 | 67.83 | 51.31 | 40.70 | 31.31 | 54.34 | ||||||||||
2014 | 36.00 | 35.29 | 48.37 | 53.47 | 63.66 | 67.73 | 79.94 | 76.71 | 67.08 | 60.89 | 41.13 | 38.56 | 55.74 | |||||||||||||
2015 | 36.71 | 45.45 | 52.63 | 53.10 | 64.53 | 75.73 | 79.19 | 76.27 | 64.73 | 59.03 | 40.90 | 38.31 | 57.22 | |||||||||||||
2016 | 36.55 | 45.31 | 49.44 | 59.28 | 63.19 | 69.85 | 74.13 | 76.08 | 65.43 | 55.26 | 50.88 | 31.89 | 56.44 | |||||||||||||
2017 | 24.29 | 35.82 | 48.81 | 53.02 | 63.35 | 69.65 | 79.00 | 78.27 | 67.12 | 54.08 | 46.20 | 33.27 | a | 54.41 | ||||||||||||
2018 | 42.11 | 41.75 | 46.92 | 54.07 | 67.07 | a | 68.45 | 78.71 | 76.10 | 65.03 | 54.00 | 41.38 | 40.16 | 56.31 | ||||||||||||
2019 | 38.29 | 28.54 | 38.74 | 55.33 | 62.97 | 68.95 | 73.82 | 76.06 | 66.18 | 50.58 | a | 40.10 | 36.56 | 53.01 | ||||||||||||
2020 | 42.76 | 43.07 | 46.45 | 55.53 | 61.97 | 68.27 | 76.37 | 76.52 | 67.67 | 56.73 | 45.58 | 38.26 | 56.60 | |||||||||||||
2021 | 42.00 | 37.98 | 49.16 | 55.60 | 63.13 | 75.78 | 81.06 | 76.06 | 67.37 | 55.39 | 49.22 | 36.55 | 57.44 | |||||||||||||
2022 | 33.89 | 38.46 | 48.18 | 46.43 | 54.24 | 64.98 | 77.68 | 78.92 | 67.95 | 58.58 | 35.25 | 28.19 | 52.73 | |||||||||||||
2023 | 37.24 | 36.68 | 42.69 | 49.87 | 63.97 | 69.33 | 77.87 | 76.16 | 65.58 | 54.02 | 39.62 | 38.52 | 54.30 | |||||||||||||
2024 | 30.27 | 41.50 | 47.89 | 52.16 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.95 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 34.20 | 39.22 | 46.87 | 53.27 | 60.80 | 67.44 | 75.01 | 73.46 | 65.09 | 54.05 | 42.40 | 36.02 | 54.09 | |||||||||||||
S.D. | 6.69 | 4.61 | 2.51 | 2.69 | 2.75 | 2.71 | 2.68 | 2.61 | 2.82 | 2.47 | 3.90 | 4.06 | 1.40 | |||||||||||||
SKEW | -1.07 | -1.38 | -0.16 | -0.13 | 0.05 | 0.61 | 0.09 | 0.08 | -0.15 | 0.41 | -0.74 | -0.73 | 0.21 | |||||||||||||
MAX | 45.31 | 47.96 | 52.63 | 60.43 | 67.07 | 75.78 | 81.06 | 78.92 | 72.02 | 60.89 | 50.88 | 44.27 | 57.44 | |||||||||||||
MIN | 14.10 | 20.72 | 38.74 | 46.43 | 54.24 | 61.52 | 67.90 | 68.53 | 58.32 | 49.63 | 27.52 | 21.87 | 50.21 | |||||||||||||
YRS | 93 | 93 | 92 | 96 | 96 | 95 | 92 | 94 | 95 | 93 | 94 | 93 | 78 |