YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.68 | a | 60.22 | 46.29 | 59.06 | i | ||
1933 | 47.00 | a | 47.91 | 59.95 | 62.82 | 70.26 | 84.57 | 94.68 | 90.92 | 86.60 | 76.90 | 61.13 | 52.82 | 69.63 | ||||||||||||
1934 | 51.55 | 58.81 | b | 68.84 | 74.75 | d | 82.62 | b | 82.50 | 94.80 | a | 92.54 | f | 83.68 | 73.22 | b | 60.52 | a | 52.78 | a | 71.28 | a | ||||
1935 | 49.82 | a | 55.75 | 56.80 | a | 66.09 | a | 72.58 | 85.38 | e | 89.06 | e | ----- | z | 85.50 | b | 73.05 | a | 54.67 | 52.15 | a | 67.35 | a | |||
1936 | 50.39 | 58.00 | o | 63.72 | a | 72.07 | a | 80.29 | 89.21 | a | 93.84 | 92.53 | 82.41 | a | 70.08 | a | 59.07 | a | 50.68 | 73.12 | a | |||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | 51.64 | t | 52.66 | 55.84 | 67.92 | 78.55 | 80.72 | 90.35 | 91.78 | f | 84.35 | 74.76 | 54.35 | 49.26 | 68.87 | b | ||||||||||
1953 | 53.84 | 51.73 | 60.50 | 66.08 | 69.23 | 82.30 | 94.15 | 90.13 | 83.82 | 68.82 | a | 58.91 | a | 46.89 | 68.87 | |||||||||||
1954 | 49.61 | 58.96 | a | 57.31 | 71.33 | 77.95 | a | 82.91 | a | 93.24 | 88.15 | 84.22 | 72.81 | 59.92 | 49.30 | a | 70.48 | |||||||||
1955 | 47.44 | 48.84 | 58.32 | 63.63 | 74.00 | 83.10 | 88.61 | 89.52 | 82.53 | 73.56 | 57.60 | 53.18 | 68.36 | |||||||||||||
1956 | 53.31 | 49.22 | 59.11 | 66.13 | 76.73 | 86.12 | 89.90 | 88.08 | 86.55 | 69.34 | 54.58 | 49.87 | 69.08 | |||||||||||||
1957 | 51.02 | a | 60.43 | 62.31 | 67.58 | 73.18 | 86.95 | a | 92.18 | 88.92 | a | 84.27 | 69.19 | 54.97 | 53.00 | 70.33 | ||||||||||
1958 | 51.63 | 58.66 | 57.10 | 66.82 | 80.82 | 86.25 | 90.48 | a | 93.44 | 85.13 | 75.24 | 57.90 | 54.77 | 71.52 | ||||||||||||
1959 | 52.00 | 53.02 | 62.19 | 71.87 | 75.21 | 88.02 | 94.85 | 89.48 | 80.52 | 71.74 | 58.53 | 50.92 | 70.70 | |||||||||||||
1960 | 46.15 | 50.76 | 63.13 | 68.93 | 75.02 | 88.12 | 91.95 | 90.95 | 84.23 | 69.65 | 57.18 | 47.13 | 69.43 | |||||||||||||
1961 | 50.73 | 55.82 | 60.44 | 68.60 | 74.94 | 88.22 | a | 93.27 | 90.63 | a | 79.03 | 68.90 | 54.22 | 48.00 | 69.40 | |||||||||||
1962 | 48.94 | 54.71 | 54.32 | 71.80 | 72.29 | 83.60 | 90.74 | 91.81 | 84.72 | 70.92 | 60.80 | 51.19 | 69.65 | |||||||||||||
1963 | 46.40 | 59.43 | ----- | z | 63.52 | 77.48 | 80.30 | 92.11 | 90.60 | 85.32 | 74.02 | 58.52 | 47.69 | 70.49 | a | |||||||||||
1964 | 44.40 | 48.38 | 56.73 | 63.42 | 72.38 | a | 82.53 | a | 92.61 | 90.03 | 81.33 | 75.00 | 53.52 | 50.15 | 67.54 | |||||||||||
1965 | 51.11 | 52.89 | 56.37 | 66.08 | 73.63 | a | 79.72 | 90.56 | 90.10 | a | 79.57 | 74.03 | a | 61.34 | a | 50.95 | 68.86 | |||||||||
1966 | 46.98 | 49.80 | 60.71 | 68.43 | 78.90 | 84.83 | 90.79 | 91.98 | 83.93 | 69.47 | 59.58 | 50.19 | 69.63 | |||||||||||||
1967 | 48.98 | 54.18 | 61.60 | 61.37 | 75.21 | 81.93 | 93.90 | 93.17 | a | 82.07 | 72.55 | 62.40 | 46.66 | 69.50 | ||||||||||||
1968 | 49.60 | 59.74 | 61.24 | 66.22 | a | 76.24 | 84.67 | a | 89.23 | c | 86.26 | 81.21 | a | 69.79 | 57.02 | a | 45.24 | 68.87 | ||||||||
1969 | 54.29 | 52.38 | 56.66 | 67.18 | 77.98 | 82.45 | 92.10 | 94.47 | 85.03 | 66.84 | 57.82 | 51.52 | 69.89 | |||||||||||||
1970 | 48.27 | 56.61 | 57.81 | 62.00 | 76.65 | 85.30 | 93.40 | 91.87 | 80.30 | 66.93 | a | 57.98 | 47.58 | 68.73 | ||||||||||||
1971 | 48.47 | 54.39 | 60.90 | 65.45 | 71.73 | 83.78 | 93.15 | 89.47 | 81.87 | 65.77 | 54.83 | 45.32 | 67.93 | |||||||||||||
1972 | 45.85 | 54.50 | 66.42 | 68.37 | 75.29 | 85.88 | 93.35 | 88.84 | 82.08 | 68.23 | 53.50 | 46.98 | 69.11 | |||||||||||||
1973 | 46.79 | ----- | z | 54.10 | 64.90 | 78.15 | 84.93 | 91.95 | 89.02 | 79.97 | 70.03 | 57.08 | 51.02 | 69.81 | a | |||||||||||
1974 | 49.24 | 53.46 | b | 62.97 | a | 67.03 | 77.74 | 88.78 | 91.30 | a | 88.66 | 85.52 | a | 72.16 | 58.20 | 47.73 | 70.23 | |||||||||
1975 | 49.11 | 52.45 | 58.05 | 60.85 | 73.68 | 84.10 | 92.89 | 88.94 | 84.25 | 69.40 | 56.07 | 51.34 | 68.43 | |||||||||||||
1976 | 50.52 | 57.69 | 59.05 | 65.38 | 78.73 | 85.05 | 92.61 | 88.53 | 81.00 | 70.37 | 59.10 | 49.31 | 69.78 | |||||||||||||
1977 | 50.35 | 55.44 | a | 55.69 | 69.27 | 71.19 | 88.05 | 93.15 | a | 91.55 | 83.80 | 74.37 | 60.93 | 56.19 | 70.83 | |||||||||||
1978 | 52.24 | 55.64 | 63.40 | 66.62 | a | 75.52 | 87.53 | 93.71 | 90.06 | 82.50 | 76.10 | 57.92 | 46.90 | 70.68 | ||||||||||||
1979 | 45.65 | 52.43 | 58.48 | 67.07 | 76.23 | 86.40 | 91.45 | 87.74 | 87.00 | 73.89 | 54.62 | 52.71 | 69.47 | |||||||||||||
1980 | 54.28 | a | 58.67 | 58.37 | 67.02 | 72.74 | 84.65 | 93.97 | 90.65 | 83.68 | 71.23 | 58.70 | 56.18 | 70.84 | ||||||||||||
1981 | 55.65 | a | 57.14 | 60.56 | 72.08 | 77.18 | 91.00 | 96.31 | 93.74 | 85.40 | 68.19 | 60.82 | 53.53 | 72.63 | ||||||||||||
1982 | 49.83 | a | 57.13 | a | 60.02 | a | 68.02 | 76.73 | 85.72 | a | 91.55 | a | 91.12 | b | 82.30 | b | 66.93 | a | 56.37 | 49.37 | a | 69.59 | ||||
1983 | 51.74 | 55.87 | a | 60.56 | 63.02 | 75.11 | c | 83.66 | a | 91.92 | 88.72 | b | 87.06 | c | 72.56 | 59.48 | a | 53.87 | 70.30 | |||||||
1984 | 52.02 | 53.91 | a | 62.03 | a | 66.65 | c | 82.35 | a | 85.57 | b | 91.07 | b | 90.68 | c | 85.85 | 66.52 | b | 56.66 | b | 50.29 | b | 70.30 | |||
1985 | 49.17 | b | 52.12 | 59.27 | a | 71.70 | 78.59 | b | 87.98 | b | 93.69 | b | 91.53 | a | 78.36 | a | 70.86 | b | 56.13 | 51.12 | a | 70.04 | ||||
1986 | 56.48 | a | 57.61 | a | 65.27 | a | 69.00 | b | 78.62 | f | 89.04 | b | 89.60 | a | 92.36 | c | 77.69 | c | 68.06 | d | 58.95 | b | 50.02 | c | 70.37 | a |
1987 | 48.28 | b | 54.48 | b | 58.20 | a | 72.92 | e | 77.26 | b | 87.07 | b | 89.25 | a | 89.96 | c | 82.80 | b | 74.52 | c | 56.96 | b | 47.28 | d | 69.92 | |
1988 | 49.20 | c | 55.93 | b | 60.07 | c | 67.25 | d | 77.29 | e | 86.40 | d | 93.83 | b | 88.64 | c | 80.37 | c | 76.26 | d | 58.81 | d | 48.55 | a | 70.22 | |
1989 | 48.02 | d | 55.37 | b | 65.40 | e | 74.53 | a | 78.25 | a | 86.67 | 93.87 | e | 89.76 | 83.90 | 70.98 | 59.85 | 50.03 | 71.39 | |||||||
1990 | 49.45 | 52.66 | 63.11 | 71.72 | 75.82 | 88.09 | a | 92.03 | b | 88.60 | 84.19 | a | 71.90 | 58.87 | 45.06 | 70.13 | ||||||||||
1991 | 48.68 | 59.02 | 57.03 | 66.76 | a | 73.52 | 82.43 | 90.50 | a | 90.15 | 84.35 | 73.98 | 58.12 | a | 50.90 | 69.62 | ||||||||||
1992 | 49.47 | 58.00 | 60.58 | 71.43 | 79.55 | 85.30 | 90.53 | 91.23 | 84.80 | 72.47 | 54.53 | 47.23 | a | 70.43 | ||||||||||||
1993 | 51.84 | 54.38 | 61.79 | 68.45 | 78.53 | 84.73 | 89.02 | 89.43 | a | 82.75 | 71.55 | 56.13 | 48.76 | 69.78 | ||||||||||||
1994 | 50.55 | 52.46 | 63.79 | 70.22 | 76.16 | 89.95 | 92.90 | a | 93.66 | 85.95 | 69.10 | 51.91 | a | 50.45 | 70.59 | |||||||||||
1995 | 52.55 | 60.05 | 60.34 | 66.85 | 73.29 | 83.30 | 91.85 | 94.20 | a | 87.65 | 71.61 | 63.50 | 52.50 | 71.47 | ||||||||||||
1996 | 52.68 | 60.14 | 62.73 | 71.22 | 80.37 | 87.82 | 95.94 | 93.81 | 83.12 | 71.55 | a | 60.08 | 52.23 | 72.64 | ||||||||||||
1997 | 53.50 | 54.52 | 65.19 | 68.78 | 83.71 | 84.78 | 90.11 | 92.42 | 85.78 | 70.29 | 58.70 | 47.82 | 71.30 | |||||||||||||
1998 | 51.60 | 52.27 | 59.15 | 63.42 | 72.66 | 82.12 | 94.18 | 94.19 | 82.78 | 68.44 | 57.36 | a | 49.10 | 68.94 | ||||||||||||
1999 | 52.11 | 54.95 | 61.00 | 64.45 | a | 76.55 | 84.77 | 90.58 | 90.50 | a | 84.93 | 72.77 | 61.30 | 50.05 | 70.33 | |||||||||||
2000 | 53.56 | 57.00 | 60.82 | 72.72 | 81.79 | 89.25 | 92.34 | 91.74 | 84.98 | 69.88 | a | 51.98 | 51.48 | 71.46 | ||||||||||||
2001 | 48.85 | 53.02 | 62.23 | 67.22 | 82.84 | 88.87 | 91.37 | 91.85 | 86.40 | 74.15 | 62.25 | 48.10 | 71.43 | |||||||||||||
2002 | 49.55 | 54.55 | 59.53 | 71.45 | 76.44 | 87.73 | 94.63 | 91.45 | 85.32 | 69.77 | 59.62 | 49.15 | 70.77 | |||||||||||||
2003 | 56.79 | 55.34 | 61.13 | 66.50 | 78.74 | 86.53 | 95.02 | 92.15 | 86.50 | 78.21 | 56.05 | 50.19 | 71.93 | |||||||||||||
2004 | 51.13 | 51.59 | 68.30 | i | 70.37 | 79.02 | 86.13 | 91.94 | 91.11 | 83.17 | a | 68.48 | a | 54.98 | d | 50.77 | a | 70.79 | a | |||||||
2005 | 52.65 | a | 54.84 | 59.15 | 65.95 | a | 77.37 | 84.64 | e | 93.47 | a | 89.45 | 82.57 | a | 71.60 | a | 59.75 | 50.21 | c | 70.14 | ||||||
2006 | 51.73 | 55.04 | 57.75 | a | 68.31 | a | 79.62 | a | 89.83 | d | 96.02 | 90.69 | 81.72 | 69.39 | 60.70 | 47.79 | 70.71 | |||||||||
2007 | 47.81 | 56.16 | 63.74 | 70.59 | b | 78.85 | a | 86.26 | a | 94.02 | b | 93.72 | b | 83.81 | a | 71.23 | a | 61.92 | 47.35 | a | 71.29 | |||||
2008 | 48.97 | 54.58 | i | 61.53 | 69.05 | 75.53 | 88.64 | a | 93.37 | 92.50 | 85.28 | 71.93 | a | 61.55 | 49.73 | a | 72.55 | a | ||||||||
2009 | 52.97 | 54.02 | 61.16 | 67.72 | 83.10 | a | 84.42 | 94.90 | a | 91.48 | 86.90 | 68.90 | 60.41 | a | 47.89 | 71.16 | ||||||||||
2010 | 51.53 | 55.46 | 59.60 | a | 66.03 | 74.13 | a | 86.57 | 95.29 | 91.68 | a | 85.75 | 72.23 | 57.57 | 53.82 | a | 70.81 | |||||||||
2011 | 49.97 | 50.41 | 62.43 | a | 70.50 | 75.27 | 85.63 | 93.55 | a | 95.74 | b | 86.57 | a | 73.07 | b | 57.43 | 47.13 | 70.64 | ||||||||
2012 | 52.65 | 54.76 | 61.39 | 70.57 | a | 81.19 | 88.82 | 91.85 | 93.66 | 86.68 | 72.40 | 60.65 | 50.35 | a | 72.08 | |||||||||||
2013 | 47.72 | b | 52.20 | 65.37 | 70.52 | 79.89 | 90.12 | 94.92 | 90.83 | b | 82.75 | 68.66 | 59.47 | 48.64 | b | 70.92 | ||||||||||
2014 | 54.06 | 59.65 | a | 65.10 | a | 70.77 | 79.47 | a | 88.90 | a | 93.95 | a | 89.30 | a | 85.79 | b | 74.40 | 59.97 | 52.26 | 72.80 | ||||||
2015 | 53.44 | 60.88 | 66.48 | a | 69.65 | 74.67 | a | 90.43 | a | 90.25 | a | 93.37 | a | 86.97 | 74.95 | 55.97 | 47.77 | 72.07 | ||||||||
2016 | 50.63 | 58.95 | 65.16 | 70.87 | 76.87 | 92.22 | a | 95.94 | 92.65 | 82.89 | b | 75.77 | 61.60 | 52.44 | 73.00 | |||||||||||
2017 | 50.95 | b | 58.95 | 65.47 | 70.20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.39 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 50.49 | 55.02 | 60.77 | 68.06 | 76.78 | 85.95 | 92.55 | 90.98 | 83.80 | 71.47 | 58.14 | 49.93 | 70.31 | |||||||||||||
S.D. | 2.61 | 3.17 | 3.12 | 3.13 | 3.22 | 2.70 | 1.92 | 1.93 | 2.28 | 2.73 | 2.62 | 2.52 | 1.20 | |||||||||||||
SKEW | 0.09 | -0.13 | 0.14 | -0.16 | 0.02 | -0.06 | -0.11 | 0.15 | -0.58 | 0.15 | -0.35 | 0.29 | 0.14 | |||||||||||||
MAX | 56.79 | 60.88 | 68.84 | 74.75 | 83.71 | 92.22 | 96.31 | 95.74 | 87.65 | 78.21 | 63.50 | 56.19 | 73.00 | |||||||||||||
MIN | 44.40 | 47.91 | 54.10 | 60.85 | 69.23 | 79.72 | 88.61 | 86.26 | 77.69 | 65.77 | 51.91 | 45.06 | 67.54 | |||||||||||||
YRS | 69 | 67 | 68 | 70 | 68 | 69 | 69 | 66 | 69 | 70 | 70 | 70 | 60 |