| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1942 | 47.63 | a | 48.48 | 52.87 | 57.63 | 62.44 | 73.42 | 81.71 | 79.19 | 71.82 | 65.39 | 53.63 | 45.06 | 61.61 | ||||||||||||
| 1943 | ----- | z | ----- | z | 54.00 | 61.23 | 68.68 | 69.55 | 79.66 | 76.23 | 75.53 | 63.66 | 54.80 | 48.23 | 65.16 | |||||||||||
| 1944 | 47.47 | 47.67 | 54.35 | 57.12 | 67.44 | 70.03 | 78.61 | 77.90 | 74.77 | 66.65 | 51.88 | 48.58 | 61.87 | |||||||||||||
| 1945 | 44.08 | 51.71 | 50.52 | 61.60 | 65.76 | 75.00 | 84.06 | 79.29 | 75.97 | 66.16 | 52.90 | 48.23 | 62.94 | |||||||||||||
| 1946 | 44.56 | 47.50 | 54.45 | 62.53 | 67.40 | 72.79 | f | 80.77 | 80.45 | 73.88 | 60.29 | 50.45 | 44.85 | 60.65 | ||||||||||||
| 1947 | 40.37 | 50.45 | 57.50 | 63.12 | 72.29 | 75.32 | 77.79 | 76.60 | 76.02 | 64.35 | 49.98 | 45.10 | 62.41 | |||||||||||||
| 1948 | 50.21 | 48.48 | 51.71 | 58.20 | 63.60 | 73.97 | 78.95 | 77.68 | 73.13 | 64.34 | 52.38 | 43.63 | 61.36 | |||||||||||||
| 1949 | 38.24 | 46.39 | 53.11 | 63.67 | 66.66 | 77.00 | 81.16 | 76.44 | 75.33 | a | 63.24 | b | 58.05 | 44.92 | 62.02 | |||||||||||
| 1950 | 43.79 | 52.16 | 53.48 | 63.21 | a | 69.23 | 73.63 | 83.97 | 80.77 | a | 73.62 | a | 65.90 | 59.03 | 51.31 | 64.17 | ||||||||||
| 1951 | 46.85 | 50.04 | 54.76 | 61.67 | a | 69.11 | 75.78 | 80.95 | 79.66 | 76.13 | 63.53 | 55.33 | 45.87 | 63.31 | ||||||||||||
| 1952 | 45.50 | 50.38 | 49.97 | 60.02 | 70.15 | 69.23 | 82.44 | 80.08 | 75.52 | 67.90 | 51.65 | 47.76 | 62.55 | |||||||||||||
| 1953 | 50.73 | 49.16 | 53.39 | 59.43 | 61.92 | 70.40 | 83.56 | 76.26 | 75.40 | 62.50 | 54.30 | 46.50 | 61.96 | |||||||||||||
| 1954 | 46.37 | 50.70 | 51.73 | 64.08 | 70.52 | 72.77 | 82.77 | 75.48 | 71.25 | 63.76 | 52.35 | 44.94 | 62.23 | |||||||||||||
| 1955 | 41.58 | 47.04 | 52.87 | 54.52 | 66.23 | 72.63 | 77.18 | 81.56 | 74.68 | 65.02 | 52.05 | 50.23 | 61.30 | |||||||||||||
| 1956 | 49.23 | 45.64 | 53.34 | 58.73 | 66.55 | 74.87 | 80.52 | 76.45 | 74.87 | 61.55 | 53.48 | 45.31 | 61.71 | |||||||||||||
| 1957 | 42.92 | 53.38 | 54.89 | 60.76 | a | 65.32 | 77.30 | 80.57 | p | 77.61 | 73.60 | a | 62.91 | b | 52.59 | b | 46.23 | c | 60.68 | |||||||
| 1958 | 46.57 | b | 54.20 | 51.03 | 59.27 | b | 69.68 | 72.90 | 80.61 | 84.25 | a | 74.79 | a | 68.76 | 54.55 | a | 50.65 | a | 63.94 | |||||||
| 1959 | 50.06 | 48.71 | 56.77 | 64.56 | c | 65.30 | a | 77.16 | a | 84.08 | 78.45 | 71.52 | d | 66.58 | a | 54.55 | b | 46.94 | 63.72 | |||||||
| 1960 | 45.98 | 49.71 | 57.28 | a | 59.55 | 66.15 | 80.83 | 83.73 | 79.69 | 75.52 | 62.21 | 51.38 | 45.06 | 63.09 | ||||||||||||
| 1961 | 43.44 | 52.54 | 53.85 | 61.75 | 65.23 | 79.93 | 84.53 | 82.58 | 72.30 | 64.34 | 52.40 | 44.45 | 63.11 | |||||||||||||
| 1962 | 41.73 | 48.45 | 51.10 | 63.42 | 64.29 | 75.30 | 81.06 | 79.08 | 74.38 | 62.94 | 54.72 | 48.58 | 62.09 | |||||||||||||
| 1963 | 43.39 | 56.71 | 53.00 | 55.77 | 67.50 | 72.75 | d | 78.95 | 78.61 | 76.68 | 66.03 | 52.87 | 42.05 | 62.03 | ||||||||||||
| 1964 | 45.95 | 48.95 | 52.97 | 59.40 | 64.85 | 74.37 | 81.71 | 80.21 | 72.37 | 68.50 | 51.40 | 50.42 | 62.59 | |||||||||||||
| 1965 | 48.23 | 50.91 | 55.52 | 60.92 | 68.19 | 72.28 | 80.85 | 81.82 | 70.47 | 67.53 | 55.62 | 42.26 | 62.88 | |||||||||||||
| 1966 | 45.21 | 47.64 | 55.53 | 64.70 | 70.31 | 75.68 | 78.34 | 82.48 | 82.75 | 65.74 | 54.98 | 45.55 | 64.08 | |||||||||||||
| 1967 | 46.13 | 48.16 | 52.94 | 50.00 | 68.02 | 73.18 | 84.87 | 85.05 | 77.67 | 68.40 | 59.03 | 44.21 | 63.14 | |||||||||||||
| 1968 | 45.27 | 55.66 | 56.42 | 61.53 | 67.32 | 77.60 | 82.61 | 76.71 | ----- | z | 63.94 | 52.03 | 44.90 | 62.18 | ||||||||||||
| 1969 | 46.52 | 48.77 | 53.02 | 58.78 | 71.18 | 73.07 | 82.35 | 81.32 | 76.93 | 61.37 | 54.60 | 48.18 | 63.01 | |||||||||||||
| 1970 | 51.85 | 53.43 | 55.74 | 56.32 | 69.94 | 75.57 | 83.47 | 80.34 | 73.97 | 64.23 | 56.95 | 47.68 | 64.12 | |||||||||||||
| 1971 | 45.85 | 49.71 | 54.79 | 59.85 | 64.42 | 74.82 | 82.56 | 82.52 | 75.25 | 62.16 | 51.67 | a | 43.37 | 62.25 | ||||||||||||
| 1972 | 41.10 | 52.33 | 60.82 | 61.50 | 71.42 | 77.97 | 82.29 | 80.13 | ----- | z | ----- | z | 49.77 | 42.15 | 61.95 | |||||||||||
| 1973 | 46.60 | 52.73 | 50.42 | 60.68 | 72.56 | 78.05 | 80.40 | ----- | z | ----- | z | 62.87 | 52.60 | 46.84 | 60.38 | |||||||||||
| 1974 | 47.13 | 49.88 | 55.31 | 58.60 | 69.02 | 76.58 | 80.45 | 79.13 | 77.27 | 66.40 | 52.40 | 45.77 | 63.16 | |||||||||||||
| 1975 | 43.48 | 50.98 | 53.97 | 54.38 | 68.85 | 75.58 | 79.44 | 77.98 | d | 74.87 | k | 62.31 | 50.08 | 45.58 | 60.24 | |||||||||||
| 1976 | 46.05 | a | 51.52 | 53.98 | c | 57.93 | 71.39 | 74.93 | a | 81.31 | 74.45 | 73.62 | 66.10 | 55.10 | 45.86 | j | 64.22 | |||||||||
| 1977 | 43.34 | 52.71 | 51.42 | 63.35 | 61.24 | 78.98 | 81.35 | 80.98 | 73.67 | 66.05 | 54.78 | 50.20 | c | 63.17 | ||||||||||||
| 1978 | ----- | z | 50.68 | 57.18 | 56.52 | 67.42 | 73.58 | 80.23 | 80.15 | d | 70.32 | b | 67.84 | c | 49.70 | 41.16 | 63.16 | |||||||||
| 1979 | 46.39 | 48.43 | 55.17 | a | ----- | z | 68.21 | c | 75.92 | d | 80.34 | 77.05 | b | 76.50 | a | 66.44 | 53.30 | ----- | z | 64.77 | ||||||
| 1980 | 49.79 | 53.64 | 53.15 | 60.90 | 65.08 | 70.97 | 80.20 | c | 77.79 | ----- | z | 66.47 | 54.88 | 47.45 | a | 61.85 | ||||||||||
| 1981 | 50.60 | a | 52.32 | 54.19 | 62.02 | a | 69.55 | a | 79.98 | 80.11 | 79.35 | 75.53 | 61.27 | 56.65 | 49.63 | 64.27 | ||||||||||
| 1982 | 43.21 | 52.38 | 53.11 | 58.43 | 69.37 | 72.35 | ----- | z | 78.65 | 72.27 | 64.84 | 51.27 | 46.29 | 60.20 | ||||||||||||
| 1983 | 43.89 | 52.00 | 54.52 | 55.43 | 68.43 | a | 74.93 | 76.02 | 79.95 | 77.05 | 66.61 | 55.07 | 50.95 | 62.90 | ||||||||||||
| 1984 | 46.55 | 52.72 | 59.68 | 60.05 | 73.92 | 76.63 | 85.42 | 81.58 | 79.33 | 61.73 | 53.02 | 45.44 | 64.67 | |||||||||||||
| 1985 | 43.23 | 50.89 | 52.29 | 66.55 | 68.65 | 80.48 | 84.66 | 78.94 | 71.03 | 63.77 | 52.75 | 43.65 | 63.07 | |||||||||||||
| 1986 | 54.10 | 55.16 | 59.92 | 62.33 | 71.63 | 79.20 | 81.89 | 83.94 | 70.88 | 66.58 | 57.32 | 47.16 | 65.84 | |||||||||||||
| 1987 | 46.11 | 52.41 | 56.76 | 68.07 | 71.95 | 79.43 | 77.87 | 80.79 | 76.60 | 71.03 | 53.83 | 47.50 | 65.20 | |||||||||||||
| 1988 | 48.44 | 54.10 | 59.23 | 62.83 | 68.90 | 76.52 | 86.58 | 81.98 | 76.87 | 70.16 | 55.57 | 46.87 | 65.67 | |||||||||||||
| 1989 | 45.40 | 49.89 | 60.26 | 68.10 | 70.13 | 77.72 | 83.26 | 80.13 | 74.82 | 66.29 | 56.33 | 46.15 | 64.87 | |||||||||||||
| 1990 | 48.23 | 49.86 | 59.24 | 67.60 | 69.58 | 77.05 | 85.18 | 82.03 | 77.08 | 69.92 | 55.47 | 43.35 | 65.38 | |||||||||||||
| 1991 | 49.42 | 58.16 | 52.95 | 61.35 | 67.85 | ----- | z | 85.55 | 80.08 | 81.69 | a | 72.55 | ----- | z | 47.92 | 65.75 | ||||||||||
| 1992 | 44.58 | 56.29 | 57.89 | 66.50 | ----- | z | 78.20 | ----- | z | 84.74 | 78.07 | 70.24 | 56.05 | 45.73 | 63.83 | |||||||||||
| 1993 | 47.35 | 52.04 | 60.35 | 62.92 | 70.31 | 76.55 | 81.06 | 80.71 | ----- | z | 69.13 | 54.85 | 47.06 | 63.85 | ||||||||||||
| 1994 | 48.71 | 50.91 | 59.94 | 64.70 | 69.76 | 79.13 | 84.39 | 83.32 | 76.93 | 65.44 | 50.53 | 47.05 | 65.07 | |||||||||||||
| 1995 | 52.21 | 54.54 | 56.77 | 61.53 | 67.68 | 75.20 | 81.73 | 82.21 | 76.98 | 68.44 | 61.17 | 52.05 | 65.87 | |||||||||||||
| 1996 | 50.37 | 55.79 | 59.18 | 64.67 | 71.40 | 79.43 | 86.27 | 84.00 | 75.43 | 65.89 | 55.53 | 50.73 | 66.56 | |||||||||||||
| 1997 | 51.15 | 53.41 | 61.50 | 65.22 | 75.95 | 77.25 | 82.23 | 81.30 | a | 78.05 | 65.90 | 57.72 | 47.03 | 66.39 | ||||||||||||
| 1998 | 50.77 | 51.20 | 56.21 | 59.30 | 62.16 | 73.30 | 83.44 | 84.82 | 76.78 | 63.32 | 53.73 | 44.81 | 63.32 | |||||||||||||
| 1999 | 46.37 | 51.68 | 54.40 | 60.82 | 69.68 | 76.40 | 81.76 | 79.20 | a | 78.23 | 69.87 | 57.55 | 48.52 | 64.54 | ||||||||||||
| 2000 | 52.23 | 54.50 | 57.33 | a | 65.62 | 72.16 | 80.55 | 79.35 | 82.76 | 75.55 | 65.45 | 50.80 | 50.03 | 65.53 | ||||||||||||
| 2001 | 46.69 | 50.18 | 60.08 | 59.62 | 77.63 | 80.93 | 83.10 | a | 82.84 | 78.38 | 69.77 | 56.67 | 48.85 | 66.23 | ||||||||||||
| 2002 | 46.40 | 54.05 | 57.29 | ----- | z | 71.03 | 80.10 | 85.50 | 81.16 | 78.22 | 64.94 | 56.18 | 50.45 | 65.94 | ||||||||||||
| 2003 | 50.92 | 51.86 | 59.18 | 58.57 | 69.81 | 78.87 | 86.31 | ----- | z | 79.87 | 70.23 | 52.45 | 51.66 | 64.52 | ||||||||||||
| 2004 | 47.90 | 51.33 | 63.60 | ----- | z | 71.84 | 78.38 | 83.89 | 81.74 | 75.48 | 64.56 | 51.19 | i | 47.83 | g | 68.75 | ||||||||||
| 2005 | 48.47 | 54.71 | i | 57.81 | 60.33 | 69.52 | 74.07 | g | 87.31 | 84.47 | 73.20 | 66.50 | 58.69 | l | 52.44 | 66.67 | ||||||||||
| 2006 | 49.60 | ----- | z | ----- | z | 60.98 | ----- | z | 81.92 | q | 88.23 | 81.18 | 77.35 | m | 64.50 | k | 57.41 | s | 48.68 | i | 70.00 | |||||
| 2007 | 45.18 | 53.20 | 62.54 | q | 62.25 | n | 74.19 | j | 79.02 | 83.47 | 83.61 | 74.03 | 63.89 | 57.60 | 46.26 | 65.14 | ||||||||||
| 2008 | 47.68 | 51.00 | 57.56 | 61.13 | 70.89 | 79.03 | 86.58 | e | 86.05 | 78.67 | 67.13 | 57.43 | 46.19 | 65.78 | ||||||||||||
| 2009 | 48.47 | 51.88 | 56.29 | 62.60 | 75.95 | 76.53 | 86.73 | 82.52 | 80.65 | 64.63 | 55.05 | 47.81 | 65.76 | |||||||||||||
| 2010 | 48.90 | 51.95 | 55.06 | 58.35 | g | 64.38 | k | 78.17 | 85.98 | f | 81.48 | 76.83 | 68.31 | 53.38 | 51.42 | 62.83 | ||||||||||
| 2011 | 46.80 | a | 48.85 | k | 55.22 | b | 61.15 | c | 65.75 | c | 74.32 | 82.53 | b | 82.53 | 80.71 | b | 67.92 | a | 53.38 | 46.31 | 65.15 | |||||
| 2012 | 50.50 | 52.78 | b | 55.66 | b | 59.45 | t | 72.44 | 77.59 | b | 82.97 | a | 86.52 | h | 82.45 | k | 50.19 | d | 35.29 | p | ----- | z | 63.16 | |||
| 2013 | ----- | z | 43.18 | i | 60.74 | 65.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.74 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.81 | 51.40 | 55.55 | 61.01 | 68.73 | 76.00 | 82.29 | 80.45 | 75.60 | 65.52 | 54.12 | 46.96 | 63.68 | |||||||||||||
| S.D. | 3.11 | 2.57 | 3.06 | 3.42 | 3.29 | 2.92 | 2.63 | 2.57 | 2.72 | 3.26 | 2.50 | 2.65 | 1.51 | |||||||||||||
| SKEW | -0.17 | 0.15 | 0.39 | -0.33 | 0.04 | -0.33 | 0.04 | -0.07 | 0.21 | -1.28 | 0.35 | 0.12 | 0.39 | |||||||||||||
| MAX | 54.10 | 58.16 | 63.60 | 68.10 | 77.63 | 80.93 | 88.23 | 86.05 | 82.75 | 72.55 | 61.17 | 52.44 | 66.56 | |||||||||||||
| MIN | 38.24 | 45.64 | 49.97 | 50.00 | 61.24 | 69.23 | 76.02 | 74.45 | 70.32 | 50.19 | 49.70 | 41.16 | 61.30 | |||||||||||||
| NO YRS | 69 | 67 | 70 | 65 | 67 | 67 | 67 | 68 | 63 | 69 | 66 | 66 | 47 | |||||||||||||