YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | 42.97 | 52.25 | 61.68 | c | 68.90 | 77.07 | a | 86.40 | 90.71 | 85.26 | 81.33 | 71.06 | 52.04 | b | 33.23 | 66.91 | ||||||||||
1932 | 39.52 | 54.21 | a | 61.29 | 71.37 | 78.00 | 86.45 | a | 90.77 | 89.84 | 84.97 | 70.16 | 61.83 | 35.13 | 68.63 | |||||||||||
1933 | 32.84 | 45.36 | 62.94 | 65.30 | 73.97 | 90.57 | 93.55 | 90.16 | 85.79 | a | 72.42 | 61.45 | a | 53.19 | 68.96 | |||||||||||
1934 | 51.74 | 58.75 | 71.48 | 73.77 | 84.10 | b | 87.07 | a | 92.74 | 88.58 | 83.23 | 77.94 | 59.77 | 50.00 | 73.26 | |||||||||||
1935 | 46.00 | a | 52.96 | a | 58.68 | 68.47 | 71.58 | 90.13 | 90.68 | 86.90 | 80.77 | 71.39 | 54.10 | 46.14 | b | 68.15 | ||||||||||
1936 | 48.93 | a | 51.21 | 60.37 | a | 71.72 | a | 80.07 | a | 90.67 | 92.37 | a | 89.84 | 80.33 | 72.26 | 55.83 | 49.43 | a | 70.25 | |||||||
1937 | 30.71 | c | 46.67 | a | 56.81 | 68.03 | 78.10 | b | 84.39 | b | 90.24 | b | 93.35 | 87.30 | 75.80 | a | 64.63 | 51.67 | a | 68.98 | ||||||
1938 | 51.55 | 52.43 | 59.71 | 70.30 | 75.19 | 88.62 | a | 91.39 | 91.67 | s | 86.00 | k | 75.48 | 57.63 | 53.61 | 67.59 | b | |||||||||
1939 | 47.90 | a | 46.00 | 63.97 | 72.79 | a | 81.48 | 90.70 | 94.13 | 91.93 | a | 84.63 | 73.90 | 61.60 | 55.42 | 72.04 | ||||||||||
1940 | 48.35 | 53.07 | 64.23 | 69.57 | 81.94 | 90.77 | 93.65 | 90.48 | 80.83 | 72.71 | 55.21 | a | 49.61 | 70.87 | ||||||||||||
1941 | 46.35 | 54.07 | 57.48 | 60.77 | 76.71 | 83.33 | 90.06 | 87.52 | 81.23 | 67.26 | 59.63 | 49.32 | 67.81 | |||||||||||||
1942 | 46.39 | 50.11 | 57.35 | 68.03 | 77.19 | 89.27 | 93.90 | 88.10 | 83.53 | 69.39 | 63.41 | a | 53.35 | 70.00 | ||||||||||||
1943 | 51.10 | 58.25 | 62.30 | a | 75.03 | 81.71 | 87.93 | 92.48 | 88.35 | 84.45 | a | 73.32 | 61.67 | 47.19 | 71.98 | |||||||||||
1944 | 45.23 | 53.14 | a | 57.23 | a | 65.03 | 77.84 | 86.60 | 91.45 | 91.74 | 83.48 | a | 73.97 | 54.87 | 49.97 | 69.21 | ||||||||||
1945 | 48.39 | 56.36 | 57.39 | 68.37 | 79.61 | 86.53 | 91.52 | 90.87 | 85.77 | 74.13 | 60.03 | 43.71 | 70.22 | |||||||||||||
1946 | 41.97 | 54.79 | 64.39 | 76.50 | 78.29 | 92.43 | 91.10 | 87.81 | 83.28 | a | 68.84 | 55.23 | 55.33 | a | 70.83 | |||||||||||
1947 | 46.61 | 58.96 | 63.65 | 69.90 | 80.93 | a | 86.93 | 93.26 | 86.23 | 86.03 | 73.40 | a | 51.57 | 45.45 | 70.24 | |||||||||||
1948 | 50.23 | 49.07 | b | 53.10 | a | 72.13 | 80.94 | 88.27 | 92.84 | 89.87 | 86.57 | 71.71 | 55.70 | 50.40 | a | 70.07 | ||||||||||
1949 | 37.65 | 50.68 | 61.35 | 71.13 | 77.84 | 87.17 | 89.90 | 89.06 | 84.86 | a | 67.32 | c | 64.52 | a | 47.06 | 69.05 | ||||||||||
1950 | 52.13 | 58.00 | a | 63.10 | 73.97 | 78.16 | 89.77 | 87.67 | d | 91.00 | 81.83 | 82.32 | 65.53 | 57.42 | 73.41 | |||||||||||
1951 | 51.61 | 52.36 | 60.10 | 68.47 | 82.15 | d | 87.76 | a | 94.48 | 88.65 | 87.52 | a | 72.00 | 55.47 | 47.84 | 70.70 | ||||||||||
1952 | 49.03 | 53.07 | 53.61 | 68.07 | 79.35 | 88.57 | 91.19 | 90.52 | 85.13 | 79.27 | a | 48.27 | 43.97 | 69.17 | ||||||||||||
1953 | 55.52 | 54.50 | 60.80 | a | 68.07 | 72.58 | 90.73 | 92.42 | 89.26 | 89.29 | f | 73.11 | c | 61.70 | 44.55 | 69.38 | a | |||||||||
1954 | 53.60 | f | 61.11 | 59.26 | 75.67 | 81.16 | 89.38 | a | 91.87 | 87.13 | 84.40 | 75.58 | 64.07 | 48.39 | 74.36 | a | ||||||||||
1955 | 44.19 | 48.93 | 62.10 | 68.93 | 76.73 | a | 85.27 | 90.32 | 87.97 | 86.93 | 76.76 | b | 60.20 | 56.38 | b | 70.39 | ||||||||||
1956 | 55.45 | 46.54 | a | 64.84 | 68.24 | a | 81.94 | 91.72 | a | 91.26 | 88.06 | 89.03 | 74.84 | 54.07 | 49.90 | 71.32 | ||||||||||
1957 | 49.32 | 60.21 | 59.68 | 67.03 | 72.83 | a | 88.93 | 90.68 | 86.73 | e | 84.93 | a | 67.81 | 52.40 | 53.30 | a | 69.49 | |||||||||
1958 | 49.00 | 57.32 | 54.42 | 67.60 | 82.90 | 90.50 | 91.94 | 90.77 | 80.63 | 72.65 | 57.43 | 57.07 | a | 71.02 | ||||||||||||
1959 | 53.52 | 53.64 | 62.21 | l | 72.67 | 78.73 | a | 90.97 | 94.35 | 85.97 | 84.27 | 71.23 | 57.47 | 46.50 | a | 71.76 | a | |||||||||
1960 | 38.61 | 48.69 | 65.39 | 72.33 | 78.58 | 91.33 | 94.13 | a | 92.35 | 86.83 | 68.45 | 61.43 | b | 37.66 | b | 69.65 | ||||||||||
1961 | 47.45 | 55.48 | a | 59.94 | 69.34 | a | 79.13 | a | 92.70 | 93.65 | 88.30 | a | 79.86 | a | 70.13 | 54.33 | 40.26 | 69.21 | ||||||||
1962 | 40.74 | 50.61 | 54.61 | 74.40 | 76.71 | 86.93 | 90.73 | a | 92.32 | 82.70 | 72.42 | 61.73 | 50.42 | 69.53 | ||||||||||||
1963 | 43.55 | 56.00 | 60.42 | 68.40 | 82.23 | 87.27 | 94.77 | 85.39 | 84.83 | 76.19 | 58.62 | a | 47.00 | 70.39 | ||||||||||||
1964 | 47.06 | 50.62 | 56.71 | 65.93 | a | 78.71 | 87.10 | 92.71 | 86.55 | 79.90 | 77.00 | 54.30 | 49.13 | 68.81 | ||||||||||||
1965 | 48.42 | 50.71 | 56.45 | 67.57 | 74.26 | 83.30 | 89.42 | 89.52 | 79.63 | 75.19 | 61.20 | 47.63 | a | 68.61 | ||||||||||||
1966 | 44.13 | 48.07 | 63.03 | 71.50 | 82.03 | 87.97 | 93.26 | 89.90 | 82.43 | 72.16 | 63.30 | 47.39 | 70.43 | |||||||||||||
1967 | 47.71 | 57.89 | 65.77 | 68.23 | 76.94 | 85.23 | 91.68 | 88.45 | 82.10 | 75.90 | 63.47 | 38.06 | 70.12 | |||||||||||||
1968 | 35.06 | 54.62 | 59.81 | 64.93 | 76.13 | 88.97 | 90.52 | 83.94 | 83.37 | 72.77 | 55.57 | 45.90 | 67.63 | |||||||||||||
1969 | 50.68 | 52.46 | 55.52 | 71.77 | 79.29 | 86.17 | 92.39 | 92.13 | 84.00 | 66.90 | 56.00 | 52.16 | 69.96 | |||||||||||||
1970 | 48.77 | 58.46 | 58.19 | 64.03 | 80.26 | 89.03 | 93.68 | 91.10 | 80.53 | 66.77 | 62.17 | 50.97 | 70.33 | |||||||||||||
1971 | 49.39 | 53.50 | 64.90 | 69.37 | 75.65 | 89.03 | 95.42 | 88.71 | 82.38 | a | 64.94 | 56.80 | 42.42 | 69.37 | ||||||||||||
1972 | 52.29 | 59.48 | 70.06 | 72.40 | 78.87 | 85.03 | 93.39 | 89.87 | 82.70 | 66.90 | 52.03 | 46.97 | 70.83 | |||||||||||||
1973 | 42.97 | 49.32 | 53.20 | a | 62.83 | 76.32 | 87.20 | 91.58 | 90.19 | 84.07 | 75.58 | 60.83 | 52.81 | 68.91 | ||||||||||||
1974 | 45.84 | 53.68 | 65.68 | 70.17 | 83.10 | 95.03 | 89.94 | 89.10 | 82.77 | 69.68 | 57.43 | 47.42 | 70.82 | |||||||||||||
1975 | 45.65 | 50.14 | 57.52 | 63.10 | 75.24 | b | 87.17 | 90.19 | 90.52 | 80.47 | 73.81 | 59.20 | 44.58 | 68.13 | ||||||||||||
1976 | 49.77 | 58.72 | 59.94 | 69.77 | 78.03 | 90.67 | 92.58 | 89.44 | d | 80.73 | 67.71 | 59.70 | 48.97 | 70.50 | ||||||||||||
1977 | 39.81 | 55.18 | 59.42 | 71.00 | 75.87 | 89.77 | 90.77 | a | 90.65 | 84.14 | a | 74.58 | 61.48 | a | 56.53 | a | 70.77 | |||||||||
1978 | 50.48 | 50.39 | 61.97 | 70.10 | 78.03 | a | 90.87 | 94.13 | 90.60 | a | 83.30 | 74.32 | 55.90 | 39.68 | 69.98 | |||||||||||
1979 | 41.43 | a | 52.86 | 58.19 | 70.47 | 73.81 | 86.43 | 93.58 | 88.35 | 87.17 | 76.39 | 53.07 | 48.81 | 69.21 | ||||||||||||
1980 | 46.10 | 55.14 | 57.45 | 68.63 | 74.84 | 91.57 | 94.30 | a | 89.71 | 84.20 | 70.68 | 60.83 | 54.68 | 70.68 | ||||||||||||
1981 | 52.94 | 58.64 | 58.71 | 73.97 | 78.81 | 92.40 | 91.19 | 90.71 | 83.20 | 70.07 | a | 65.33 | 55.52 | 72.62 | ||||||||||||
1982 | 45.57 | c | 53.04 | b | 60.00 | c | 70.55 | a | 76.48 | b | 88.24 | a | 91.00 | a | 88.16 | 83.25 | b | 70.54 | c | 56.32 | b | 48.60 | f | 71.20 | a | |
1983 | 46.85 | d | 53.12 | c | 57.78 | d | 64.17 | f | 78.03 | b | 86.66 | a | 91.83 | b | 89.00 | 85.48 | a | 72.27 | e | 57.83 | f | 52.23 | a | 71.33 | b | |
1984 | 50.00 | a | 55.85 | b | 64.06 | 67.69 | a | 86.03 | a | 88.80 | 90.71 | 87.20 | a | 83.00 | a | 64.16 | 60.73 | d | 48.17 | b | 70.53 | |||||
1985 | 46.07 | c | 50.36 | 61.00 | 72.90 | 80.07 | a | 92.21 | a | 93.93 | b | 91.83 | b | 80.14 | b | 71.74 | 57.70 | 50.42 | 70.70 | |||||||
1986 | 58.21 | b | 56.04 | 64.87 | a | 70.96 | b | 80.90 | 91.79 | a | 89.71 | 91.10 | 80.47 | 68.81 | 59.23 | 46.23 | a | 71.53 | ||||||||
1987 | 43.13 | a | 51.61 | 56.66 | b | 73.64 | b | 77.55 | 90.57 | 91.06 | 87.03 | 83.41 | a | 76.07 | b | 56.97 | a | 46.90 | 69.55 | |||||||
1988 | 45.29 | 57.52 | 63.72 | b | 69.66 | a | 79.45 | 89.07 | a | 92.97 | 87.06 | 82.27 | 77.61 | 60.97 | 50.06 | 71.30 | ||||||||||
1989 | 48.32 | 55.29 | 69.87 | a | 78.34 | a | 83.87 | 91.17 | a | 94.90 | b | 88.03 | 85.47 | 72.71 | 61.77 | 52.03 | 73.48 | |||||||||
1990 | 52.10 | 53.26 | a | 63.52 | 74.10 | 79.68 | 94.40 | 90.93 | a | 88.19 | 84.43 | b | 73.30 | d | 59.23 | 40.66 | b | 71.15 | ||||||||
1991 | 45.37 | a | 60.64 | 58.57 | a | 70.33 | 79.03 | a | 85.55 | a | 92.53 | a | 90.23 | 83.07 | a | 75.39 | c | 57.53 | 44.79 | c | 70.25 | |||||
1992 | 35.38 | b | 53.81 | b | 61.69 | e | 75.24 | a | 75.93 | d | 86.57 | b | 89.30 | a | 87.90 | b | 84.61 | b | 74.93 | b | 52.70 | c | 40.12 | e | 68.18 | |
1993 | 49.45 | b | 53.19 | a | 64.58 | g | 73.19 | c | 80.52 | b | 88.93 | b | 92.80 | a | 88.90 | a | 84.31 | a | 71.18 | c | 55.61 | g | 51.24 | f | 75.83 | c |
1994 | 52.52 | d | 54.42 | d | 64.70 | d | 71.33 | f | 79.21 | c | 93.43 | 94.86 | b | 92.68 | c | 84.54 | b | 70.34 | b | 55.64 | e | 51.85 | d | 72.20 | a | |
1995 | 49.54 | g | 60.44 | a | 62.86 | c | 67.24 | a | 73.92 | e | 88.07 | a | 95.11 | c | 93.27 | a | 83.76 | a | 75.45 | b | 64.43 | g | 60.29 | q | 77.79 | c |
1996 | 56.11 | l | 61.88 | c | 63.24 | f | 75.67 | f | 86.55 | b | 92.74 | c | 94.06 | 90.90 | 80.26 | g | 70.27 | e | 59.04 | e | 53.04 | c | 76.06 | d | ||
1997 | 46.29 | g | 55.09 | e | 67.69 | b | 69.17 | f | 82.67 | a | 87.86 | a | 92.36 | c | 88.76 | b | 84.19 | c | 71.50 | c | 59.62 | d | 43.36 | f | 76.64 | c |
1998 | 51.32 | c | 48.46 | d | 60.04 | g | 64.22 | c | 78.07 | c | 87.21 | b | 93.28 | b | 90.14 | b | 86.34 | a | 71.46 | e | 61.58 | d | 50.15 | e | 71.11 | a |
1999 | 56.47 | a | 60.83 | e | 67.41 | b | 61.00 | p | 79.39 | c | 88.64 | b | 87.71 | 87.10 | 82.31 | d | ----- | z | 67.92 | f | 53.04 | c | 73.65 | c | ||
2000 | 57.89 | c | 62.74 | b | 62.79 | c | 76.08 | e | 88.64 | c | 92.72 | a | 95.48 | 92.55 | 89.43 | 72.43 | c | 52.35 | d | 53.79 | c | 74.74 | ||||
2001 | 47.61 | c | 57.38 | d | 65.89 | c | 73.11 | b | 85.97 | b | 94.96 | b | 92.75 | c | 89.43 | a | 88.93 | a | 78.21 | b | 63.50 | f | 47.85 | d | 74.74 | a |
2002 | 50.26 | d | 56.60 | c | 65.65 | h | 76.48 | e | 82.86 | b | 94.59 | c | 95.31 | b | 92.58 | 82.00 | a | 69.56 | d | 57.38 | d | 43.12 | e | 72.79 | a | |
2003 | 52.39 | c | 52.19 | g | 58.78 | d | 67.19 | c | 81.33 | a | 88.89 | b | 95.93 | a | 89.11 | c | 85.81 | d | 78.39 | c | 60.41 | h | 52.76 | f | 77.54 | c |
2004 | 49.65 | h | 51.19 | c | 69.73 | a | 68.36 | b | 81.87 | 90.36 | b | 92.77 | a | 88.64 | c | 82.96 | d | 71.04 | e | 55.54 | b | 48.31 | e | 72.80 | a | |
2005 | 52.52 | b | 51.92 | d | 58.89 | d | 69.80 | e | 81.46 | c | 89.46 | b | 97.90 | b | 88.66 | b | 86.07 | b | 76.04 | e | 63.89 | b | 54.54 | g | 74.24 | a |
2006 | 55.12 | f | 59.54 | d | 57.88 | g | 74.50 | f | 85.74 | d | 95.04 | c | 94.62 | b | 86.68 | 80.82 | b | 70.88 | e | 65.25 | f | 50.76 | f | 81.90 | e | |
2007 | 43.78 | h | 54.16 | c | 67.56 | d | 73.50 | b | 82.10 | b | 93.59 | c | 94.68 | c | 90.70 | a | 86.29 | b | 75.69 | b | 66.89 | c | 46.78 | h | 78.52 | b |
2008 | 46.79 | g | 53.57 | f | 64.96 | d | 71.81 | d | 79.20 | f | 92.21 | b | 91.77 | a | 92.00 | c | 84.90 | a | 74.72 | b | 62.20 | e | 49.70 | d | 76.03 | c |
2009 | 51.70 | d | 60.43 | e | 66.35 | h | 71.44 | e | 83.55 | b | 85.96 | c | 95.32 | c | 91.97 | a | 84.59 | a | 71.11 | d | 64.00 | h | 44.15 | d | 74.02 | b |
2010 | 43.81 | e | 51.04 | c | 61.77 | e | 71.55 | a | 79.86 | c | 91.59 | a | 92.52 | 89.45 | 86.93 | a | 73.87 | a | 58.24 | e | 55.43 | c | 71.34 | |||
2011 | 45.13 | a | 53.52 | e | 67.23 | 72.10 | 77.29 | 91.87 | 92.71 | 92.71 | 84.27 | 72.29 | 59.20 | 42.17 | b | 70.87 | ||||||||||
2012 | 54.16 | 56.11 | a | 66.42 | 75.90 | 84.06 | 94.77 | 91.00 | 91.16 | 84.80 | 76.58 | 65.43 | 51.60 | a | 74.33 | |||||||||||
2013 | 45.29 | 50.89 | 66.74 | 72.63 | 80.77 | 94.93 | 92.23 | 87.90 | a | 83.73 | 69.87 | a | 59.30 | 47.21 | b | 70.96 | ||||||||||
2014 | 56.65 | 62.04 | 64.90 | 71.40 | 79.23 | 92.90 | 94.19 | 88.10 | 85.90 | 74.81 | d | 62.97 | 49.79 | b | 73.57 | |||||||||||
2015 | 50.81 | 63.82 | 68.00 | 72.55 | a | 75.26 | 91.73 | 88.74 | 91.97 | 85.57 | 73.42 | 59.14 | a | 48.42 | 72.45 | |||||||||||
2016 | 48.10 | 61.64 | a | 68.06 | 70.27 | 78.13 | a | 94.70 | 94.13 | 87.26 | 83.41 | c | 78.32 | 61.20 | 53.58 | 73.23 | ||||||||||
2017 | 48.97 | 60.00 | 68.29 | 72.83 | 79.00 | 94.67 | 92.13 | 89.97 | 84.97 | 78.06 | 69.70 | 56.16 | 74.56 | |||||||||||||
2018 | 56.35 | 57.30 | a | 65.60 | a | 77.73 | 83.42 | 94.27 | 93.48 | 91.71 | 88.15 | c | ----- | z | 59.29 | f | 51.19 | 75.92 | b | |||||||
2019 | 45.29 | 50.54 | b | 63.97 | 72.97 | 73.68 | 89.47 | 94.81 | 93.58 | 84.83 | 73.35 | 60.77 | 47.06 | 70.86 | ||||||||||||
2020 | 50.52 | 55.29 | a | 61.35 | 71.80 | 83.77 | 91.17 | 93.84 | 96.90 | 86.60 | 77.35 | 62.70 | 49.45 | 73.40 | ||||||||||||
2021 | 48.68 | 56.93 | 58.87 | 72.10 | 82.74 | 94.67 | 92.26 | 89.26 | 85.70 | 68.65 | ----- | z | ----- | z | 74.98 | b | ||||||||||
2022 | 49.81 | 51.18 | 61.42 | 73.33 | 83.13 | 91.20 | 93.10 | 90.58 | 86.23 | 68.48 | 54.37 | 49.35 | 71.02 | |||||||||||||
2023 | 47.68 | 48.57 | 56.87 | 70.40 | 80.23 | 87.20 | 98.74 | 90.48 | 85.70 | 76.77 | 60.70 | 50.80 | a | 71.18 | ||||||||||||
2024 | 48.77 | 57.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.89 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.69 | 54.45 | 61.73 | 70.57 | 79.38 | 89.72 | 92.54 | 89.57 | 84.04 | 72.79 | 58.95 | 48.67 | 70.56 | |||||||||||||
S.D. | 5.32 | 4.18 | 4.22 | 3.43 | 3.39 | 2.94 | 1.99 | 2.15 | 2.25 | 3.47 | 4.03 | 5.00 | 1.69 | |||||||||||||
SKEW | -0.73 | 0.10 | 0.10 | -0.29 | 0.12 | 0.08 | 0.17 | 0.22 | 0.02 | -0.05 | -0.09 | -0.70 | 0.50 | |||||||||||||
MAX | 58.21 | 63.82 | 71.48 | 78.34 | 88.64 | 95.04 | 98.74 | 96.90 | 89.43 | 82.32 | 69.70 | 57.42 | 74.74 | |||||||||||||
MIN | 30.71 | 45.36 | 53.10 | 60.77 | 71.58 | 83.30 | 87.67 | 83.94 | 79.63 | 64.16 | 48.27 | 33.23 | 66.91 | |||||||||||||
YRS | 86 | 92 | 86 | 87 | 92 | 93 | 93 | 92 | 90 | 91 | 83 | 84 | 69 |