| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1936 | ----- | z | ----- | z | ----- | z | 64.09 | s | 66.65 | 70.00 | d | 74.45 | 78.81 | 72.20 | 65.68 | 50.47 | 48.94 | 65.90 | ||||||||
| 1937 | 39.00 | 44.92 | c | 55.48 | 54.77 | 69.38 | g | 76.12 | f | 83.48 | 84.03 | 77.23 | 69.90 | 57.23 | 51.61 | 61.77 | ||||||||||
| 1938 | 49.42 | 52.57 | 55.45 | 64.72 | a | 72.94 | 80.10 | 88.00 | 84.32 | 81.40 | 66.65 | 51.97 | 49.48 | 66.42 | ||||||||||||
| 1939 | 49.58 | 49.93 | 61.84 | 69.97 | 72.97 | 74.63 | 84.94 | 87.26 | 82.63 | 65.97 | 57.40 | 53.45 | 67.55 | |||||||||||||
| 1940 | 49.71 | 54.55 | 62.45 | 65.87 | 74.45 | 83.60 | 82.55 | 88.29 | 75.63 | 68.42 | 52.57 | 50.55 | 67.39 | |||||||||||||
| 1941 | 50.35 | 55.82 | 64.77 | 64.50 | 67.87 | 72.67 | 87.35 | 80.16 | 72.50 | 65.29 | 56.33 | 48.81 | 65.54 | |||||||||||||
| 1942 | 48.00 | 51.93 | 58.13 | 62.93 | 65.61 | 72.50 | 81.94 | 83.52 | 80.90 | 69.32 | 54.30 | 50.71 | 64.98 | |||||||||||||
| 1943 | 44.19 | 57.89 | 58.23 | 65.63 | 68.52 | 72.80 | 84.35 | 81.68 | 84.45 | h | 65.68 | 56.97 | 47.39 | 63.94 | ||||||||||||
| 1944 | 48.81 | 52.62 | 59.13 | 60.48 | a | 70.58 | 73.97 | 86.19 | 84.06 | 84.63 | 71.45 | 53.17 | 48.23 | 66.11 | ||||||||||||
| 1945 | 51.77 | 54.32 | 53.68 | 61.17 | 68.87 | 78.40 | 90.48 | 85.55 | 80.70 | 68.65 | 54.03 | 50.52 | 66.51 | |||||||||||||
| 1946 | 49.52 | 52.93 | ----- | z | 62.81 | c | 73.90 | a | ----- | z | ----- | z | ----- | z | 75.25 | n | 60.94 | 51.79 | b | 47.87 | 57.11 | |||||
| 1947 | 45.03 | 56.04 | 61.29 | 66.23 | 75.35 | 72.37 | 78.48 | ----- | z | 77.97 | 64.26 | 54.20 | 46.87 | 63.46 | ||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.65 | k | 81.23 | a | 79.43 | 69.92 | s | 53.11 | k | 45.68 | 68.78 | |||
| 1949 | 42.13 | 50.57 | 58.00 | 68.47 | 73.71 | 80.33 | 85.26 | 84.03 | 78.43 | 63.39 | 59.40 | 49.03 | 66.06 | |||||||||||||
| 1950 | 40.00 | 52.32 | 55.74 | 62.17 | 71.35 | 76.00 | 87.42 | 90.29 | 80.53 | 62.19 | 56.17 | 55.13 | 65.78 | |||||||||||||
| 1951 | 48.74 | 53.68 | 54.94 | 70.30 | 71.97 | 83.67 | 84.26 | 85.52 | 83.50 | 65.29 | 56.60 | 47.71 | 67.18 | |||||||||||||
| 1952 | 47.29 | 52.76 | 55.13 | 66.97 | 71.52 | 72.40 | 87.10 | 83.65 | 84.00 | 74.38 | e | 50.60 | 50.61 | 66.37 | ||||||||||||
| 1953 | 54.39 | 54.64 | 57.35 | 63.37 | 67.03 | 69.93 | 84.94 | 81.23 | 81.20 | 70.56 | o | 59.17 | 50.39 | 65.78 | ||||||||||||
| 1954 | 50.97 | a | 56.64 | 57.45 | 65.50 | 71.29 | 70.27 | 79.81 | 77.71 | 75.97 | 68.94 | ----- | z | 56.19 | 66.43 | |||||||||||
| 1955 | 47.81 | ----- | z | ----- | z | 53.84 | e | 67.61 | 74.03 | 75.90 | 82.87 | 77.30 | 63.87 | 52.07 | 49.39 | 64.47 | ||||||||||
| 1956 | 48.48 | 46.24 | 55.00 | 64.27 | 70.81 | 72.67 | 84.55 | 81.42 | 78.53 | 62.71 | 50.93 | 49.71 | 63.78 | |||||||||||||
| 1957 | 47.16 | 52.93 | 55.77 | 64.87 | 71.23 | 76.97 | 80.45 | 80.48 | 81.60 | 63.26 | 52.17 | 49.90 | 64.73 | |||||||||||||
| 1958 | 50.84 | 55.11 | 56.52 | 62.70 | 76.00 | 75.60 | 88.16 | ----- | z | 77.67 | 70.00 | 55.90 | 53.77 | 65.66 | ||||||||||||
| 1959 | 51.26 | 51.86 | 57.77 | 66.53 | 68.65 | 74.70 | 87.06 | 83.87 | 71.27 | 67.45 | 55.67 | 49.58 | 65.47 | |||||||||||||
| 1960 | 46.48 | 52.72 | 58.90 | 63.43 | 65.29 | 81.23 | 87.81 | 81.42 | 80.73 | 65.90 | 54.83 | 48.35 | 65.59 | |||||||||||||
| 1961 | 52.26 | 55.00 | 55.87 | 63.10 | 65.97 | 80.97 | 84.68 | 87.10 | 74.67 | 65.58 | 52.43 | 48.61 | 65.52 | |||||||||||||
| 1962 | 46.71 | 51.96 | 55.74 | 67.73 | 64.06 | 77.30 | 85.61 | 82.32 | 80.57 | 63.87 | 56.20 | 49.77 | 65.16 | |||||||||||||
| 1963 | 45.47 | a | 59.75 | 57.32 | 59.03 | 71.06 | 74.90 | 78.84 | 83.55 | 81.43 | 66.52 | 53.60 | 48.26 | 64.98 | ||||||||||||
| 1964 | 48.87 | 54.38 | 56.35 | 62.27 | 67.13 | 72.00 | a | 83.04 | e | 80.26 | 77.50 | 70.52 | 50.37 | 47.87 | a | 64.21 | ||||||||||
| 1965 | 47.97 | 53.64 | 63.26 | 64.33 | 69.39 | 76.00 | 85.65 | 83.26 | 78.67 | 69.48 | 56.70 | 45.71 | 66.17 | |||||||||||||
| 1966 | 49.03 | 51.61 | 57.45 | 68.40 | 72.81 | 77.73 | 80.39 | 84.42 | 81.07 | 66.84 | 54.27 | 50.39 | 66.20 | |||||||||||||
| 1967 | 49.90 | 55.18 | 55.35 | 56.77 | 72.58 | 80.17 | 85.74 | 91.87 | 82.87 | 65.42 | 56.03 | 47.84 | 66.64 | |||||||||||||
| 1968 | 49.32 | 60.69 | 61.65 | 63.60 | 69.61 | 77.93 | 85.97 | 81.20 | f | 77.37 | 64.81 | 56.50 | 47.52 | 65.00 | ||||||||||||
| 1969 | 45.16 | 49.43 | 62.50 | a | 63.17 | 74.90 | a | 76.10 | 83.23 | a | 83.55 | 78.57 | 65.10 | 55.37 | 49.57 | a | 65.55 | |||||||||
| 1970 | 51.58 | 58.68 | 61.26 | 60.45 | a | 73.97 | a | 81.47 | 87.07 | a | 85.16 | 76.73 | 66.58 | 54.73 | 46.90 | 67.05 | ||||||||||
| 1971 | 47.03 | 51.43 | 54.16 | 61.23 | 68.00 | 71.37 | 82.77 | 82.94 | 75.00 | 62.80 | a | 53.17 | 46.74 | 63.05 | ||||||||||||
| 1972 | 46.84 | 53.34 | 60.52 | 59.47 | 71.74 | 77.33 | 86.97 | 87.16 | 75.97 | 67.75 | k | 55.60 | 45.23 | 65.47 | ||||||||||||
| 1973 | 46.84 | 57.11 | 55.16 | 66.13 | 72.55 | 77.50 | 85.71 | 81.61 | 85.12 | n | 68.09 | i | 52.60 | j | 52.33 | a | 66.10 | |||||||||
| 1974 | 50.07 | c | 52.68 | 59.42 | 62.64 | b | 69.70 | d | 81.09 | g | 84.78 | d | 87.79 | c | 90.43 | g | 73.63 | l | 56.30 | j | 52.33 | d | 64.93 | |||
| 1975 | 51.97 | b | 52.15 | b | 56.47 | a | 63.07 | p | 74.25 | k | 78.17 | f | 83.86 | b | 84.19 | e | 86.84 | e | 67.76 | n | 55.44 | u | 49.50 | e | 66.43 | |
| 1976 | 50.36 | c | 52.61 | f | 57.83 | b | 61.25 | b | 73.42 | 75.93 | c | 82.25 | c | 79.59 | d | 79.05 | k | 66.61 | m | 58.24 | e | 43.03 | b | 64.66 | ||
| 1977 | 49.79 | b | 56.92 | b | 56.55 | b | 68.50 | b | 65.31 | b | 79.67 | c | 81.43 | h | 86.75 | c | 72.90 | i | 69.62 | o | 55.65 | d | 52.26 | 63.49 | ||
| 1978 | 51.06 | 54.56 | a | 63.42 | 61.66 | a | 68.59 | b | 81.30 | j | 82.42 | g | 85.83 | h | 71.00 | s | 77.00 | t | 49.79 | p | 44.65 | n | 59.86 | |||
| 1979 | 43.60 | k | 50.88 | l | 62.32 | 61.93 | 72.61 | 78.60 | 84.32 | 81.74 | 81.60 | 71.90 | 52.90 | 50.84 | 69.88 | |||||||||||
| 1980 | 48.19 | 56.31 | 57.33 | d | 67.33 | 68.23 | 71.17 | 83.71 | 82.35 | 81.67 | 68.48 | 55.93 | a | 50.48 | 65.93 | |||||||||||
| 1981 | 51.52 | 55.68 | 59.81 | 63.70 | 68.00 | 73.73 | 82.26 | 83.74 | 80.10 | 65.65 | 55.57 | b | 51.74 | d | 65.96 | |||||||||||
| 1982 | 46.45 | i | 54.50 | 56.65 | 62.30 | 73.87 | 78.57 | 79.58 | 82.81 | 77.47 | 65.90 | 53.50 | j | 47.15 | k | 70.18 | ||||||||||
| 1983 | 49.42 | 53.43 | 56.61 | 63.13 | 70.03 | b | 75.40 | 76.74 | 80.87 | 76.80 | 66.77 | 55.10 | 45.29 | 64.13 | ||||||||||||
| 1984 | 49.77 | 53.93 | 60.87 | 60.24 | a | 69.61 | 73.93 | 87.26 | 83.81 | 79.03 | 61.77 | a | 52.20 | 44.42 | 64.74 | |||||||||||
| 1985 | 45.42 | 51.68 | 54.29 | 65.80 | 69.00 | 80.63 | 88.84 | 83.77 | 74.40 | 66.32 | 47.33 | 44.00 | 64.29 | |||||||||||||
| 1986 | 51.58 | 54.14 | 65.06 | 63.34 | a | 72.32 | 81.47 | 80.19 | 89.10 | 73.83 | 70.26 | 56.17 | 49.52 | 67.25 | ||||||||||||
| 1987 | 49.97 | 54.64 | 59.65 | 69.57 | 72.32 | 80.47 | 77.33 | a | 87.90 | 81.64 | b | 75.52 | 55.47 | 46.65 | 67.59 | |||||||||||
| 1988 | 47.71 | 55.55 | 62.06 | 67.57 | 69.87 | 76.57 | 86.81 | 85.73 | a | 81.40 | 71.87 | 53.17 | 47.10 | 67.12 | ||||||||||||
| 1989 | 49.10 | 46.61 | 54.81 | 69.50 | 69.71 | 76.40 | 76.81 | 78.90 | 83.27 | 68.03 | 55.63 | 48.42 | 64.77 | |||||||||||||
| 1990 | 50.03 | 51.82 | 61.74 | 67.40 | 67.77 | 72.87 | 85.58 | 83.74 | 80.60 | 66.48 | 54.23 | 40.94 | 65.27 | |||||||||||||
| 1991 | 48.48 | 57.93 | 56.42 | 59.47 | 64.19 | 70.17 | 86.19 | 84.32 | 85.57 | 71.55 | 56.23 | 47.45 | 65.66 | |||||||||||||
| 1992 | 50.87 | 58.97 | 66.45 | 68.63 | 82.19 | 80.13 | 85.13 | 88.26 | 80.63 | 70.74 | 54.23 | 46.77 | 69.42 | |||||||||||||
| 1993 | 46.10 | 51.50 | 61.48 | 61.07 | 73.16 | 75.03 | 77.97 | 83.71 | 85.33 | 73.10 | 51.03 | 48.58 | 65.67 | |||||||||||||
| 1994 | 53.68 | 53.57 | 63.32 | 64.30 | 71.61 | 75.03 | 87.84 | 84.32 | 83.90 | 66.61 | 49.93 | 49.16 | 66.94 | |||||||||||||
| 1995 | 50.13 | 58.07 | 57.52 | 63.47 | 73.42 | 75.53 | 84.55 | 84.52 | 82.07 | 68.26 | 57.53 | 50.13 | 67.10 | |||||||||||||
| 1996 | 47.61 | 54.55 | 61.52 | 65.40 | 69.29 | 78.97 | 89.84 | 88.68 | 79.67 | 68.19 | 57.93 | 51.39 | 67.75 | |||||||||||||
| 1997 | 51.29 | 54.61 | 59.03 | 63.27 | 76.26 | 73.43 | 83.06 | 85.39 | 77.13 | 61.61 | 56.07 | 47.52 | 65.72 | |||||||||||||
| 1998 | 51.77 | 55.36 | 56.32 | 62.77 | 62.97 | 72.77 | 85.19 | 88.26 | 81.43 | 64.03 | 54.07 | 46.32 | 65.11 | |||||||||||||
| 1999 | 49.16 | 51.86 | 54.45 | 62.30 | 64.13 | 71.53 | 81.35 | 80.52 | 81.90 | 67.94 | 57.10 | 48.74 | 64.25 | |||||||||||||
| 2000 | 48.65 | 53.21 | 58.90 | 68.23 | 68.03 | 79.13 | 79.84 | 82.55 | 78.63 | 65.39 | 50.60 | 49.26 | 65.20 | |||||||||||||
| 2001 | 48.52 | 52.14 | 57.87 | 60.37 | 74.55 | 73.40 | 81.48 | 79.45 | 77.33 | 64.95 | j | 54.67 | 47.19 | 64.27 | ||||||||||||
| 2002 | 47.90 | 54.21 | 54.52 | 64.03 | 69.00 | 77.20 | 84.58 | 83.65 | 79.53 | k | 64.65 | 55.93 | 50.48 | 64.20 | ||||||||||||
| 2003 | 54.32 | 54.46 | 59.00 | 58.27 | 71.32 | 81.83 | 89.42 | 86.04 | h | 80.43 | b | 71.42 | 50.60 | 49.58 | 65.51 | |||||||||||
| 2004 | 50.23 | 55.21 | 67.42 | 69.83 | 71.39 | 77.33 | 88.03 | 86.90 | 75.62 | a | 66.87 | 55.03 | 50.55 | 67.87 | ||||||||||||
| 2005 | 49.68 | 57.61 | 62.48 | 63.93 | 71.81 | 74.70 | 87.23 | 88.19 | 79.73 | 67.39 | 53.50 | 49.52 | 67.15 | |||||||||||||
| 2006 | 51.45 | 57.93 | 55.32 | 64.87 | 73.87 | 78.80 | 86.45 | 85.00 | 82.73 | 69.87 | 54.17 | 48.26 | 67.39 | |||||||||||||
| 2007 | 48.13 | 53.79 | 64.23 | 65.57 | 72.84 | 76.37 | 83.84 | 82.42 | 78.13 | 64.45 | 53.73 | 47.48 | 65.91 | |||||||||||||
| 2008 | 45.90 | 54.03 | 56.52 | 61.20 | 72.16 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.96 | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 48.81 | 53.95 | 58.66 | 63.86 | 70.58 | 76.16 | 84.01 | 83.99 | 79.46 | 67.07 | 54.44 | 48.88 | 65.96 | |||||||||||||
| S.D. | 2.83 | 2.91 | 3.32 | 3.46 | 3.40 | 3.51 | 3.59 | 2.95 | 3.33 | 3.19 | 2.44 | 2.61 | 1.24 | |||||||||||||
| SKEW | -1.01 | -0.46 | 0.62 | -0.35 | 0.18 | 0.15 | -0.66 | 0.27 | -0.26 | 0.41 | -0.43 | -0.06 | 0.13 | |||||||||||||
| MAX | 54.39 | 60.69 | 67.42 | 70.30 | 82.19 | 83.67 | 90.48 | 91.87 | 86.84 | 75.52 | 59.40 | 56.19 | 69.42 | |||||||||||||
| MIN | 39.00 | 44.92 | 53.68 | 53.84 | 62.97 | 69.93 | 74.45 | 77.71 | 71.27 | 60.94 | 47.33 | 40.94 | 63.05 | |||||||||||||
| NO YRS | 69 | 68 | 69 | 70 | 70 | 66 | 68 | 66 | 64 | 62 | 65 | 70 | 49 | |||||||||||||