YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | 33.85 | a | 35.98 | a | 42.43 | b | 49.82 | 60.22 | a | 62.67 | f | 73.35 | 71.43 | a | 60.33 | 49.59 | d | 34.77 | d | 27.08 | 48.99 | a | ||||
1932 | 27.46 | c | 30.41 | b | 40.66 | 51.16 | e | 55.42 | f | 66.14 | a | 67.25 | a | 69.28 | b | 61.77 | b | 50.55 | 41.92 | 26.62 | b | 48.47 | a | |||
1933 | 31.71 | 24.26 | c | 40.74 | 48.12 | a | 52.60 | 63.59 | h | 71.80 | f | 71.94 | d | 56.78 | c | 53.47 | 39.72 | a | 38.71 | b | 45.81 | b | ||||
1934 | 37.59 | b | 39.77 | 47.76 | 56.78 | 59.73 | e | 64.76 | g | 70.86 | f | 71.69 | d | 58.83 | a | 52.72 | a | 43.20 | 33.67 | d | 50.17 | b | ||||
1935 | 33.77 | c | 36.35 | a | 38.88 | b | 46.18 | 56.26 | b | 63.44 | e | 71.12 | a | 68.23 | c | 65.30 | 47.81 | 32.23 | 29.92 | a | 49.12 | |||||
1936 | 31.65 | a | 17.00 | a | 39.93 | a | 52.13 | c | 62.73 | 66.00 | d | 72.15 | a | 70.56 | g | 59.96 | c | 53.53 | 33.28 | 32.61 | 47.36 | a | ||||
1937 | 10.83 | a | 28.22 | a | 44.75 | a | 47.60 | d | 57.89 | d | 64.19 | d | 73.40 | e | 66.44 | g | 62.96 | c | 54.32 | a | 41.37 | 33.48 | 47.18 | a | ||
1938 | 31.86 | c | 33.73 | 41.34 | 50.23 | 56.93 | b | 66.63 | 75.44 | e | 67.86 | b | 68.00 | 52.32 | 35.40 | 33.05 | b | 51.07 | ||||||||
1939 | 35.92 | f | 30.96 | 43.34 | 51.50 | 59.60 | 62.18 | 72.97 | 73.54 | d | 63.02 | a | 49.95 | b | 41.02 | 37.52 | 53.24 | a | ||||||||
1940 | 30.03 | 36.97 | 45.47 | b | 50.91 | c | 61.12 | e | 68.56 | f | 71.78 | b | 70.33 | e | 64.87 | 54.03 | a | 31.87 | 33.10 | 50.04 | a | |||||
1941 | 30.50 | a | 39.24 | a | 46.65 | 52.31 | a | 55.73 | a | 62.18 | 74.94 | 70.64 | b | 56.52 | a | 48.62 | a | 40.95 | 33.47 | a | 50.98 | |||||
1942 | 22.11 | 33.35 | e | 41.53 | 49.86 | a | 54.35 | 60.25 | 72.21 | 74.26 | 63.62 | a | 51.10 | a | 34.08 | 30.07 | a | 48.90 | ||||||||
1943 | 22.02 | a | 33.59 | 38.45 | a | 51.05 | 52.37 | 60.19 | a | 71.29 | c | 67.85 | a | 65.60 | 51.66 | 38.53 | 29.98 | a | 48.55 | |||||||
1944 | 30.00 | 33.24 | 39.70 | a | 50.71 | f | 57.95 | 64.23 | 72.87 | a | 68.79 | 64.28 | a | 56.81 | 36.82 | 28.45 | a | 50.28 | a | |||||||
1945 | 33.00 | b | 37.04 | 39.76 | f | 46.83 | c | 58.38 | j | 62.64 | e | 73.27 | g | 71.96 | g | 58.33 | f | 53.58 | g | 36.43 | c | 30.19 | d | 41.02 | f | |
1946 | 34.26 | h | 37.44 | d | 42.32 | f | 50.00 | f | 58.70 | d | 62.60 | e | 70.61 | h | 71.46 | f | 60.13 | d | 45.30 | d | 35.74 | e | 32.17 | d | 47.44 | e |
1947 | 27.06 | g | 37.46 | d | 44.92 | a | 50.70 | e | 62.48 | 62.91 | a | 72.13 | l | 68.21 | e | 62.08 | d | 51.12 | c | 37.23 | h | 33.73 | e | 52.62 | c | |
1948 | 30.62 | f | 31.50 | d | 39.55 | c | 46.35 | 54.58 | 66.85 | ----- | z | 67.53 | 60.27 | 48.90 | 38.00 | 23.47 | 47.70 | b | ||||||||
1949 | 10.11 | 29.62 | 42.53 | 53.08 | 61.71 | 64.03 | 70.81 | 69.79 | 64.43 | 47.19 | 43.73 | 32.79 | 49.15 | |||||||||||||
1950 | 10.87 | 32.58 | b | 40.13 | 46.82 | 54.50 | 63.13 | 71.79 | 71.76 | 64.02 | 49.00 | 38.22 | 35.27 | 48.17 | ||||||||||||
1951 | 29.94 | 34.61 | 37.31 | 49.80 | 57.66 | 64.15 | 72.58 | 69.48 | 63.20 | 49.16 | 36.98 | 24.21 | 49.09 | |||||||||||||
1952 | 23.32 | 35.43 | 40.74 | 51.62 | 58.15 | 63.17 | 71.39 | 70.10 | 65.02 | 55.85 | 31.87 | 31.79 | 49.87 | |||||||||||||
1953 | 39.28 | a | 37.38 | 42.74 | 48.40 | 54.98 | 59.68 | 70.32 | 70.24 | 64.62 | 53.02 | 43.57 | 35.79 | 51.67 | ||||||||||||
1954 | 27.65 | 35.68 | 39.00 | 46.25 | 58.24 | 60.27 | 69.27 | 66.84 | 61.25 | 49.76 | 44.28 | 31.98 | 49.21 | |||||||||||||
1955 | 28.32 | 31.98 | 36.15 | 43.52 | a | 52.79 | 65.97 | 69.44 | 69.79 | 61.98 | 50.56 | 30.17 | 28.82 | 47.46 | ||||||||||||
1956 | 30.89 | 23.95 | 40.50 | 51.55 | 61.00 | 62.45 | 74.29 | 70.42 | a | 63.23 | 48.47 | 34.13 | 32.08 | 49.41 | ||||||||||||
1957 | 15.60 | 31.23 | 42.16 | 50.33 | 61.56 | 65.88 | 69.56 | 67.10 | a | 65.22 | 48.73 | 38.18 | 37.39 | 49.41 | ||||||||||||
1958 | 35.58 | a | 44.05 | 41.27 | 47.77 | 64.00 | 68.97 | 75.95 | 74.68 | 60.66 | a | 51.97 | 38.67 | 33.32 | 53.07 | |||||||||||
1959 | 31.90 | 34.38 | 42.92 | 50.02 | 53.63 | 64.30 | 72.66 | 66.50 | 58.95 | 48.88 | a | 34.28 | 31.66 | 49.17 | ||||||||||||
1960 | 22.45 | 35.45 | a | 42.18 | 47.82 | 53.95 | 63.60 | 75.90 | a | 67.31 | 62.38 | 51.89 | 39.28 | 28.53 | 49.23 | |||||||||||
1961 | 32.90 | 41.39 | 43.34 | 47.47 | 56.73 | 70.07 | 74.53 | 76.06 | 57.78 | 48.39 | 32.65 | 30.24 | 50.96 | |||||||||||||
1962 | 28.48 | 36.00 | 39.47 | 52.07 | 52.71 | 62.58 | 69.23 | 66.77 | 62.82 | 50.66 | 41.52 | 35.92 | 49.85 | |||||||||||||
1963 | 24.02 | 38.57 | 43.85 | 47.08 | 56.92 | 64.40 | 67.65 | 70.66 | 67.77 | 53.77 | 40.23 | 27.81 | 50.23 | |||||||||||||
1964 | 33.34 | 35.98 | 39.24 | 46.23 | 55.38 | a | 63.45 | 70.66 | 65.74 | 59.30 | 52.35 | 36.63 | 26.56 | 48.74 | ||||||||||||
1965 | 30.60 | b | 38.46 | 39.89 | 51.73 | 55.48 | 64.38 | 72.44 | 71.60 | 58.65 | 55.66 | 43.22 | 32.98 | a | 51.26 | |||||||||||
1966 | 33.19 | 37.84 | 42.76 | 48.92 | 58.98 | 62.53 | 69.03 | 70.45 | 66.03 | 50.32 | 41.67 | 36.53 | 51.52 | |||||||||||||
1967 | 37.31 | 40.57 | 41.13 | 44.55 | 55.39 | 66.42 | 71.77 | 75.26 | 68.28 | 51.50 | 38.82 | 30.97 | 51.83 | |||||||||||||
1968 | 33.39 | 40.78 | 45.11 | 46.10 | 56.98 | 63.97 | 72.82 | a | 66.87 | 62.48 | 48.13 | 39.28 | 29.77 | 50.47 | ||||||||||||
1969 | 17.68 | 30.29 | 42.56 | 50.12 | 59.42 | 68.83 | 69.32 | 67.73 | 63.20 | 47.77 | 39.42 | 32.05 | 49.03 | |||||||||||||
1970 | 29.65 | 39.55 | 41.60 | 44.73 | 56.45 | 68.80 | 73.68 | 71.68 | 57.40 | 48.76 | 39.27 | 31.47 | 50.25 | |||||||||||||
1971 | 34.06 | 37.23 | 38.19 | 47.83 | 58.98 | 60.12 | 71.92 | 74.81 | 56.47 | a | 47.08 | 38.37 | 28.24 | 49.44 | ||||||||||||
1972 | 28.11 | 33.52 | 44.42 | 45.47 | 59.26 | 65.20 | 70.50 | 72.34 | 56.47 | 49.47 | 40.20 | 26.18 | 49.26 | |||||||||||||
1973 | 30.31 | 37.62 | 44.11 | 49.15 | 57.87 | 64.00 | 71.44 | 68.40 | 61.52 | 50.16 | 36.38 | 36.42 | 50.62 | |||||||||||||
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.89 | u | 49.40 | 37.40 | 32.19 | 39.67 | i | |||
1976 | 32.74 | 34.67 | 39.11 | 46.97 | 55.89 | 59.08 | 69.13 | 65.71 | 64.28 | 48.82 | 37.23 | 31.13 | 48.73 | |||||||||||||
1977 | 22.31 | 38.61 | 40.92 | 52.47 | 53.08 | 67.36 | a | 68.38 | a | 72.84 | 56.93 | 48.94 | 36.07 | 32.34 | 49.19 | |||||||||||
1978 | 30.42 | 37.25 | 44.56 | 48.15 | 52.95 | 64.27 | 69.05 | b | 66.89 | 58.50 | 48.77 | 30.98 | a | 23.89 | 47.97 | |||||||||||
1979 | 12.34 | 32.22 | a | 43.87 | 47.28 | 57.89 | 63.90 | 70.45 | 69.27 | 63.78 | 51.81 | 32.68 | 35.42 | 48.41 | ||||||||||||
1980 | 21.58 | 34.33 | 40.37 | 52.53 | 57.02 | b | 59.65 | 69.42 | a | 64.34 | 61.05 | 50.55 | 39.52 | 35.73 | 48.84 | |||||||||||
1981 | 37.05 | 37.00 | 44.66 | 48.30 | 55.16 | 58.76 | a | 67.55 | 72.56 | 60.93 | 48.23 | 41.31 | a | 31.31 | 50.23 | |||||||||||
1982 | 26.20 | a | 35.79 | 42.47 | 44.83 | 54.67 | a | 66.32 | 69.53 | 70.10 | 60.75 | 48.10 | 35.07 | 30.73 | 48.71 | |||||||||||
1983 | 37.26 | 40.93 | a | 45.45 | 46.84 | a | 57.50 | 62.05 | 66.88 | a | 72.06 | 57.18 | 49.85 | 41.90 | 21.47 | a | 49.95 | |||||||||
1984 | 30.94 | 36.70 | a | 44.74 | 46.45 | 52.21 | 60.88 | a | 71.15 | 70.55 | b | 58.45 | 46.35 | a | 38.48 | 23.92 | 48.40 | |||||||||
1985 | 22.44 | 28.67 | a | 40.55 | 50.90 | 59.33 | a | 65.68 | 76.65 | 67.82 | 56.32 | 48.43 | b | 21.53 | a | 17.66 | 46.33 | |||||||||
1986 | 32.03 | b | 35.33 | a | 46.32 | a | 47.27 | 58.15 | 68.04 | b | 66.15 | 73.98 | 57.73 | 51.81 | 38.05 | 29.10 | 50.33 | |||||||||
1987 | 27.08 | 37.77 | 44.66 | b | 54.03 | 60.50 | 67.19 | a | 69.44 | 68.72 | b | 65.43 | 52.19 | 41.67 | a | 29.10 | a | 51.48 | ||||||||
1988 | 28.68 | 38.48 | a | 42.55 | b | 51.82 | 56.69 | 62.95 | 70.12 | a | 69.12 | b | 61.53 | 56.77 | 40.72 | a | 28.95 | a | 50.70 | |||||||
1989 | 32.55 | 24.54 | a | 40.78 | a | 52.40 | a | 55.13 | a | 66.32 | 70.52 | a | 66.89 | 63.24 | a | 49.73 | 41.37 | 30.48 | 49.49 | |||||||
1990 | 35.83 | a | 33.81 | a | 43.81 | 52.65 | 54.92 | a | 63.95 | a | 74.66 | b | 70.38 | c | 66.75 | d | 48.37 | a | 41.81 | a | 23.22 | a | 50.85 | |||
1991 | 26.10 | a | 41.92 | c | 40.28 | a | 49.00 | 54.26 | 59.34 | b | 70.16 | b | 72.41 | c | 64.32 | 48.71 | 37.43 | a | 35.27 | a | 49.93 | |||||
1992 | 34.53 | a | 41.29 | a | 47.80 | a | 51.33 | a | 60.68 | 68.50 | e | 68.96 | d | 70.67 | a | 59.05 | b | 52.04 | c | 37.05 | a | 26.18 | a | 51.51 | ||
1993 | 22.45 | 27.43 | a | 39.88 | a | 48.34 | a | 62.11 | c | 61.91 | a | 63.63 | a | 67.26 | 61.27 | 52.48 | a | 31.66 | a | 32.87 | 47.61 | |||||
1994 | 37.77 | a | 34.16 | c | 44.18 | a | 52.09 | a | 58.69 | b | 63.18 | 73.40 | 70.72 | a | 64.84 | b | 47.67 | d | 36.43 | 33.05 | b | 51.35 | ||||
1995 | 33.23 | a | 40.55 | 42.81 | 47.77 | 58.39 | 63.02 | a | 70.06 | g | 65.53 | a | 64.83 | a | 46.79 | 41.43 | a | 31.18 | a | 48.68 | a | |||||
1996 | 28.83 | a | 31.69 | b | 40.72 | a | 50.07 | 51.83 | b | 61.81 | a | 72.68 | a | 69.95 | b | 57.83 | a | 48.56 | 35.50 | 27.16 | 48.05 | |||||
1997 | 30.15 | 35.50 | a | 43.75 | a | 46.62 | 59.08 | 61.77 | b | 68.03 | 72.55 | 63.38 | a | 48.27 | 40.25 | ----- | z | 51.76 | a | |||||||
1998 | 33.38 | a | 40.27 | 43.83 | a | 49.03 | 57.21 | 63.71 | a | 75.98 | 72.60 | 66.03 | 49.57 | a | 41.77 | 29.62 | c | 51.92 | ||||||||
1999 | 35.13 | a | 38.30 | a | 42.53 | a | 46.92 | 52.97 | 60.73 | b | 68.00 | 72.11 | 60.62 | 49.30 | a | 43.75 | 34.97 | 50.44 | ||||||||
2000 | 31.53 | 37.43 | a | 41.23 | 52.55 | 55.60 | 63.57 | 69.02 | 68.43 | a | 59.52 | a | 48.50 | 30.97 | 26.32 | 48.72 | ||||||||||
2001 | 29.21 | 32.88 | 42.70 | a | 46.46 | b | 58.43 | a | 60.12 | b | 69.90 | a | 72.64 | b | 64.15 | 48.53 | a | 41.82 | b | 32.33 | a | 49.93 | ||||
2002 | 34.55 | a | 36.63 | a | 38.62 | a | 48.10 | 54.84 | b | 64.92 | 73.48 | d | 68.37 | 60.98 | b | 45.58 | a | 38.46 | d | 36.31 | e | 50.07 | ||||
2003 | 36.18 | a | 37.04 | a | 44.62 | c | 49.69 | a | 54.45 | a | 65.10 | a | 72.93 | a | 71.50 | 64.58 | 55.08 | a | 34.93 | c | 31.87 | 51.50 | ||||
2004 | 26.02 | 34.79 | a | 46.97 | 51.36 | a | 55.93 | a | 64.81 | a | 74.03 | a | 73.00 | 59.80 | 52.05 | a | 39.03 | 34.32 | 51.01 | |||||||
2005 | 30.67 | b | 37.00 | a | 44.82 | 50.71 | a | 59.40 | 62.71 | a | 71.60 | 71.03 | a | 59.29 | a | 51.79 | b | 36.38 | a | 26.28 | d | 50.14 | ||||
2006 | 39.39 | 34.43 | a | 42.40 | b | 49.21 | d | 57.37 | 64.12 | 74.02 | a | 68.53 | b | 62.39 | b | 49.39 | c | 38.66 | a | 27.82 | a | 50.64 | ||||
2007 | 27.13 | 35.79 | 45.60 | b | 47.97 | a | 57.58 | a | 64.48 | d | 74.66 | b | 67.80 | a | 59.50 | c | 48.90 | 37.00 | d | 30.73 | c | 49.76 | ||||
2008 | 25.33 | a | 35.61 | b | 39.95 | 44.72 | 57.81 | b | 62.48 | a | 70.65 | a | 70.09 | c | 62.18 | 49.78 | a | 40.43 | b | 23.00 | 48.50 | |||||
2009 | 28.83 | b | 35.31 | a | 39.31 | b | 47.57 | 56.82 | 64.48 | 72.87 | a | 70.76 | b | 64.47 | a | 46.50 | a | 38.74 | a | 24.73 | a | 49.20 | ||||
2010 | 37.66 | 40.50 | a | 43.91 | b | 49.53 | 52.21 | 60.83 | 69.80 | a | 68.60 | a | 61.45 | 51.94 | 35.43 | 32.44 | 50.36 | |||||||||
2011 | 32.24 | 32.86 | 42.55 | 44.10 | 53.21 | 60.33 | 68.45 | 71.06 | 69.98 | 54.88 | a | 37.32 | 27.87 | 49.57 | ||||||||||||
2012 | 30.37 | 36.93 | 41.79 | 50.12 | 54.79 | 61.60 | 73.66 | 72.22 | a | 62.68 | 49.89 | 44.90 | 38.21 | 51.43 | ||||||||||||
2013 | 27.69 | 38.05 | 44.13 | a | 48.42 | 57.34 | 64.10 | 74.11 | 72.55 | 65.67 | 48.97 | 36.83 | 26.50 | 50.36 | ||||||||||||
2014 | 32.89 | 31.36 | 44.32 | 50.30 | 58.35 | 63.75 | 76.23 | 72.98 | 64.48 | 54.79 | 37.32 | 36.18 | 51.91 | |||||||||||||
2015 | 35.77 | 45.79 | 50.97 | 50.88 | 61.42 | 71.47 | 73.98 | 72.27 | 59.77 | 56.27 | 36.38 | 33.23 | 54.02 | |||||||||||||
2016 | 34.13 | 42.83 | 46.29 | 56.12 | 60.10 | 66.57 | 69.60 | 71.02 | 59.97 | 52.40 | 47.57 | 26.39 | 52.75 | |||||||||||||
2017 | 23.23 | 32.14 | 44.60 | 49.37 | 59.65 | 65.70 | 73.16 | 73.76 | 63.70 | 48.95 | 42.15 | 31.82 | 50.69 | |||||||||||||
2018 | 38.61 | 37.46 | 44.29 | 50.82 | 63.60 | 64.27 | 73.24 | 70.69 | 59.32 | 48.74 | 38.18 | 35.19 | 52.03 | |||||||||||||
2019 | 34.50 | 25.38 | 37.71 | 52.63 | 60.71 | 65.30 | 69.79 | 72.10 | 62.55 | 45.29 | 36.15 | 33.18 | 49.61 | |||||||||||||
2020 | 35.84 | 37.12 | 40.89 | 48.67 | 57.69 | 62.88 | 70.15 | 71.06 | 64.17 | 49.92 | 38.78 | 32.29 | 50.79 | |||||||||||||
2021 | 35.52 | 32.16 | 43.00 | 49.82 | 56.76 | 71.80 | 76.10 | 71.10 | 61.63 | 50.24 | 41.28 | 30.74 | 51.68 | |||||||||||||
2022 | 28.40 | 34.61 | 44.95 | 43.63 | 52.16 | 63.42 | 73.47 | 75.94 | 65.12 | 56.37 | 31.55 | 24.37 | 49.50 | |||||||||||||
2023 | 34.94 | 35.23 | 40.66 | 47.35 | 63.23 | 66.27 | 74.60 | 73.26 | 63.28 | 52.03 | 37.85 | 36.82 | 52.13 | |||||||||||||
2024 | 30.18 | 38.91 | 43.69 | 49.80 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.59 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.74 | 35.28 | 42.44 | 49.15 | 57.21 | 63.98 | 71.51 | 70.34 | 62.03 | 50.42 | 37.97 | 30.79 | 50.05 | |||||||||||||
S.D. | 6.38 | 4.60 | 2.63 | 2.68 | 2.98 | 2.72 | 2.62 | 2.54 | 3.04 | 2.66 | 3.95 | 4.15 | 1.39 | |||||||||||||
SKEW | -1.20 | -0.98 | 0.24 | 0.17 | 0.15 | 0.49 | -0.19 | -0.02 | 0.03 | 0.56 | -0.79 | -0.51 | 0.17 | |||||||||||||
MAX | 39.39 | 45.79 | 50.97 | 56.78 | 64.00 | 71.80 | 76.65 | 76.06 | 69.98 | 56.81 | 47.57 | 38.71 | 54.02 | |||||||||||||
MIN | 10.11 | 17.00 | 36.15 | 43.52 | 51.83 | 58.76 | 63.63 | 64.34 | 56.32 | 45.29 | 21.53 | 17.66 | 46.33 | |||||||||||||
YRS | 88 | 92 | 90 | 89 | 89 | 87 | 84 | 87 | 90 | 91 | 91 | 91 | 76 |