| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1962 | ----- | z | ----- | z | 58.04 | g | 70.37 | 67.35 | 81.37 | 91.63 | a | 84.42 | 84.03 | 64.13 | 55.23 | 47.06 | 71.73 | |||||||||
| 1963 | 45.29 | 58.50 | 56.13 | a | 57.33 | 73.26 | 77.83 | 83.03 | 86.24 | b | 84.23 | 65.45 | 51.47 | 45.35 | 65.34 | |||||||||||
| 1964 | 45.26 | 54.00 | 56.84 | 64.43 | 70.19 | 78.10 | 87.45 | 87.41 | b | 81.89 | b | 73.52 | 49.60 | 46.48 | 66.27 | |||||||||||
| 1965 | 42.55 | 54.43 | 63.00 | a | 64.00 | 71.90 | 80.97 | 91.27 | a | 85.27 | a | 81.52 | a | 71.30 | a | 52.60 | 44.10 | 66.91 | ||||||||
| 1966 | 47.55 | 50.57 | 58.45 | 70.93 | 76.94 | 80.80 | 86.00 | 89.39 | 81.24 | a | 70.10 | a | 53.90 | a | 46.84 | 67.73 | ||||||||||
| 1967 | 46.53 | a | 54.22 | a | 53.97 | a | 55.07 | b | 75.26 | 84.30 | 92.61 | 96.71 | 86.63 | 66.42 | 53.89 | b | 43.48 | 67.43 | ||||||||
| 1968 | 45.23 | 57.59 | 60.57 | a | 66.07 | 73.00 | a | 83.40 | 92.23 | 83.39 | 80.90 | 65.77 | 51.62 | a | 45.55 | 67.11 | ||||||||||
| 1969 | 41.48 | 47.07 | 60.42 | 63.60 | 78.81 | 80.67 | 89.03 | 88.68 | 81.70 | 62.84 | 53.07 | 46.97 | 66.19 | |||||||||||||
| 1970 | 48.16 | 56.00 | 58.87 | 58.33 | 75.35 | 85.40 | 93.84 | 91.87 | 79.93 | 67.84 | 53.37 | 43.97 | 67.74 | |||||||||||||
| 1971 | 44.87 | 50.54 | 53.10 | 60.60 | 70.90 | 77.33 | 90.52 | 89.84 | 77.77 | 64.32 | 52.13 | 42.74 | 64.55 | |||||||||||||
| 1972 | 44.94 | 51.76 | 62.63 | a | 62.97 | 77.45 | 84.97 | 95.20 | a | 91.36 | f | ----- | z | ----- | z | 50.65 | m | 43.19 | 65.39 | |||||||
| 1973 | 45.42 | 54.86 | 53.84 | 67.13 | 77.35 | 80.17 | 90.42 | 86.81 | 79.70 | 65.55 | 49.37 | 49.55 | 66.68 | |||||||||||||
| 1974 | 46.97 | 50.36 | 56.61 | 62.17 | 70.97 | 83.40 | 85.90 | 89.71 | 90.57 | 72.81 | 53.87 | 47.55 | 67.57 | |||||||||||||
| 1975 | 47.84 | 49.86 | 53.00 | 58.13 | 74.19 | 79.67 | 87.06 | 84.29 | 87.77 | 62.65 | 50.87 | 47.13 | 65.20 | |||||||||||||
| 1976 | 49.74 | 52.28 | 56.45 | 60.60 | 73.55 | 76.57 | 86.16 | 80.00 | 81.27 | 73.45 | 55.00 | 43.45 | 65.71 | |||||||||||||
| 1977 | 45.90 | 58.25 | 55.39 | 69.47 | 63.61 | 84.70 | 86.81 | 90.00 | 76.63 | 67.35 | 53.87 | 50.10 | 66.84 | |||||||||||||
| 1978 | 48.87 | 53.68 | 63.58 | 58.73 | 70.06 | 79.90 | 87.81 | 84.65 | 72.30 | 74.77 | 53.20 | 44.68 | 66.02 | |||||||||||||
| 1979 | 45.29 | 49.21 | 61.55 | 61.03 | 74.29 | 81.37 | 86.65 | 82.58 | 83.47 | 70.35 | 49.00 | 48.84 | 66.14 | |||||||||||||
| 1980 | 49.03 | 54.59 | 55.52 | 64.10 | 70.42 | 72.27 | 87.45 | 87.26 | 82.87 | 71.87 | 53.20 | 47.74 | 66.36 | |||||||||||||
| 1981 | 48.39 | 52.36 | 58.26 | 65.77 | 70.61 | 80.00 | 88.87 | 91.84 | 82.13 | 65.68 | 52.37 | 49.68 | 67.16 | |||||||||||||
| 1982 | 43.77 | 52.61 | 53.58 | 60.13 | 76.13 | 79.93 | 84.94 | 86.48 | 77.30 | 67.23 | 51.87 | 47.74 | 65.14 | |||||||||||||
| 1983 | 46.58 | 50.11 | 55.16 | 60.27 | 74.42 | 76.70 | 79.68 | 84.97 | 78.03 | 68.58 | 51.80 | 46.48 | 64.40 | |||||||||||||
| 1984 | 49.16 | 52.93 | 59.94 | 59.70 | 71.00 | 77.17 | 91.87 | 87.39 | 81.83 | 63.07 | a | 49.90 | 42.81 | 65.56 | ||||||||||||
| 1985 | 47.10 | 55.00 | 55.39 | 70.40 | 70.87 | 83.60 | 91.35 | 87.23 | 75.47 | 68.87 | 47.60 | 44.55 | 66.45 | |||||||||||||
| 1986 | 50.55 | 55.04 | 64.10 | 64.13 | 72.61 | 83.60 | 86.58 | 94.23 | 74.03 | 70.48 | 57.13 | 46.23 | 68.23 | |||||||||||||
| 1987 | 47.81 | 53.86 | 57.94 | 72.97 | 75.68 | 86.00 | 82.90 | 93.13 | 82.20 | 78.00 | 55.97 | 46.42 | 69.41 | |||||||||||||
| 1988 | 46.68 | 60.10 | 61.87 | 65.63 | 69.39 | 78.13 | 92.45 | 93.06 | 87.27 | 79.58 | 52.73 | 45.39 | 69.36 | |||||||||||||
| 1989 | 47.42 | 49.39 | 54.94 | 71.10 | 72.35 | 82.53 | 84.52 | 87.19 | 84.83 | 69.87 | 56.70 | 46.90 | 67.31 | |||||||||||||
| 1990 | 49.65 | 51.75 | 61.77 | 71.73 | 70.87 | 78.50 | 91.97 | 87.13 | 85.27 | 69.77 | 53.00 | 42.23 | 67.80 | |||||||||||||
| 1991 | 49.97 | 60.21 | 54.48 | 61.93 | 68.00 | 79.40 | 93.16 | 90.16 | 92.53 | 77.84 | 59.27 | 44.87 | 69.32 | |||||||||||||
| 1992 | 50.68 | 58.07 | 64.29 | 67.47 | 83.77 | 83.53 | 90.48 | 95.58 | 85.67 | 72.90 | 55.43 | 44.94 | 71.07 | |||||||||||||
| 1993 | 43.81 | 49.25 | 60.87 | 59.40 | 71.06 | 77.90 | 84.10 | 87.32 | 88.03 | 73.52 | 53.77 | 47.45 | 66.37 | |||||||||||||
| 1994 | 50.74 | 52.89 | 64.26 | 66.80 | 75.35 | 80.23 | 94.97 | 88.87 | 86.37 | 70.58 | 47.33 | 46.61 | 68.75 | |||||||||||||
| 1995 | 49.81 | 58.75 | 55.39 | 63.23 | 73.55 | 78.20 | 87.97 | 88.61 | 86.23 | 73.48 | 59.47 | 51.42 | 68.84 | |||||||||||||
| 1996 | 47.71 | 54.38 | 61.58 | 65.03 | 70.74 | 83.03 | 96.03 | 94.39 | 82.63 | 69.52 | 55.77 | 49.23 | 69.17 | |||||||||||||
| 1997 | 47.29 | 54.39 | 59.97 | 64.37 | 78.87 | 78.90 | 91.06 | 89.77 | 80.70 | 65.48 | 54.20 | 44.16 | 67.43 | |||||||||||||
| 1998 | 50.35 | 48.79 | 57.74 | 65.00 | 64.61 | 80.93 | 93.13 | 95.39 | 89.47 | 67.65 | 52.63 | 45.87 | 67.63 | |||||||||||||
| 1999 | 47.71 | 47.21 | 54.00 | 65.20 | 71.77 | 82.17 | 90.97 | 88.16 | 90.03 | 74.77 | 58.00 | 46.00 | 68.00 | |||||||||||||
| 2000 | 46.48 | 53.10 | 58.58 | 69.97 | 71.39 | 86.60 | 89.65 | 92.42 | 84.13 | 70.68 | 50.03 | 46.35 | 68.28 | |||||||||||||
| 2001 | 49.74 | 53.57 | 62.29 | 62.10 | 83.00 | 81.53 | 91.55 | 92.29 | 88.70 | 74.45 | 55.40 | 47.68 | 70.19 | |||||||||||||
| 2002 | 49.39 | 57.82 | 59.00 | 69.37 | 74.29 | 86.10 | 95.74 | 92.45 | 88.47 | 75.39 | 57.43 | 48.87 | 71.19 | |||||||||||||
| 2003 | 54.90 | 56.32 | 60.16 | 57.40 | 74.61 | 88.93 | 97.55 | 92.19 | 91.17 | 76.81 | 52.40 | 48.87 | 70.94 | |||||||||||||
| 2004 | 47.94 | 53.55 | 67.77 | 71.73 | 74.71 | 84.30 | 95.48 | 93.23 | 83.53 | 70.55 | 54.73 | 52.13 | 70.80 | |||||||||||||
| 2005 | 45.23 | 58.11 | 64.16 | 64.27 | 72.16 | 76.40 | 94.55 | 96.90 | 84.60 | 70.03 | 51.90 | 47.42 | 68.81 | |||||||||||||
| 2006 | 49.74 | 58.00 | 51.90 | 65.17 | 77.68 | 85.17 | 96.23 | 93.39 | 88.77 | 71.97 | a | 54.13 | 47.52 | 69.97 | ||||||||||||
| 2007 | 47.74 | 50.68 | 66.40 | u | 66.87 | 79.23 | 83.47 | 94.03 | 94.07 | a | 86.60 | 66.94 | 59.17 | 48.84 | 70.69 | |||||||||||
| 2008 | 47.81 | 57.14 | 59.52 | 66.43 | 80.36 | f | 88.97 | 96.94 | 94.39 | 93.50 | 73.10 | 56.58 | k | 46.35 | h | 75.31 | ||||||||||
| 2009 | 48.81 | 52.93 | 60.10 | 72.00 | 81.35 | 84.93 | 97.61 | 93.13 | 87.77 | ----- | z | 52.53 | 42.71 | 70.35 | ||||||||||||
| 2010 | 50.39 | 55.04 | 58.77 | 61.80 | 68.84 | 79.87 | 95.94 | 93.48 | 84.10 | 70.45 | 53.70 | 47.42 | 68.32 | |||||||||||||
| 2011 | 48.48 | 51.12 | b | 53.61 | c | 61.66 | a | 69.13 | 82.40 | 90.62 | g | 95.52 | 92.43 | 70.33 | a | 52.90 | 46.03 | 65.78 | ||||||||
| 2012 | 49.45 | 53.83 | 54.58 | 65.80 | 77.87 | 80.17 | 92.84 | 96.41 | b | 92.68 | b | 72.13 | 54.80 | 44.61 | 69.60 | |||||||||||
| 2013 | 44.39 | 54.11 | 61.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.16 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 47.58 | 53.73 | 58.54 | 64.51 | 73.42 | 81.42 | 90.52 | 89.99 | 84.22 | 70.21 | 53.46 | 46.44 | 67.67 | |||||||||||||
| S.D. | 2.44 | 3.27 | 3.75 | 4.41 | 4.18 | 3.41 | 4.29 | 4.10 | 4.95 | 4.12 | 2.78 | 2.28 | 1.78 | |||||||||||||
| SKEW | 0.00 | 0.04 | 0.20 | 0.07 | 0.25 | 0.02 | -0.32 | -0.22 | -0.19 | 0.11 | 0.12 | 0.21 | 0.26 | |||||||||||||
| MAX | 54.90 | 60.21 | 67.77 | 72.97 | 83.77 | 88.97 | 97.61 | 96.90 | 93.50 | 79.58 | 59.47 | 52.13 | 71.19 | |||||||||||||
| MIN | 41.48 | 47.07 | 51.90 | 55.07 | 63.61 | 72.27 | 79.68 | 80.00 | 72.30 | 62.65 | 47.33 | 42.23 | 64.40 | |||||||||||||
| NO YRS | 51 | 51 | 50 | 51 | 50 | 51 | 50 | 50 | 50 | 49 | 49 | 50 | 45 | |||||||||||||