| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.79 | c | 82.00 | 74.31 | e | 52.84 | e | 49.55 | 71.10 | |||
| 1959 | 47.55 | 48.93 | 58.68 | 68.27 | 69.74 | 82.70 | 94.26 | 88.68 | 76.30 | 70.13 | 55.03 | 44.81 | 67.09 | |||||||||||||
| 1960 | 37.68 | 50.31 | 58.90 | 66.60 | 70.58 | 86.97 | 97.13 | 87.48 | 83.93 | 70.68 | 53.60 | 42.35 | 67.18 | |||||||||||||
| 1961 | 48.74 | 55.64 | 57.52 | 66.03 | 71.87 | 89.50 | 94.74 | 95.48 | 78.37 | 67.55 | 50.50 | 46.35 | 68.53 | |||||||||||||
| 1962 | 44.55 | 49.21 | 55.48 | 71.47 | 67.65 | 83.17 | 91.45 | 86.94 | 85.23 | 65.29 | 55.80 | 46.87 | 66.93 | |||||||||||||
| 1963 | 42.97 | 57.29 | 59.06 | 59.97 | 74.32 | 79.77 | 87.26 | 90.29 | 86.23 | 70.10 | 54.67 | 41.71 | 66.97 | |||||||||||||
| 1964 | 49.03 | 55.41 | 56.65 | 65.07 | 73.32 | 80.10 | 91.84 | 87.77 | 81.57 | 69.61 | 47.10 | 42.13 | a | 66.63 | ||||||||||||
| 1965 | 45.00 | 56.43 | 60.77 | 68.47 | 74.00 | 83.50 | 93.06 | 88.68 | 79.10 | 74.68 | 53.87 | 48.56 | o | 70.69 | ||||||||||||
| 1966 | 45.09 | t | 51.19 | a | 60.94 | 70.23 | 78.84 | 80.87 | 88.10 | 90.61 | 84.27 | 70.77 | 53.97 | 46.74 | 70.59 | |||||||||||
| 1967 | 51.32 | 58.04 | 56.97 | 58.40 | 76.87 | 85.00 | 94.65 | 98.06 | 89.40 | 69.55 | 55.03 | 46.68 | 70.00 | |||||||||||||
| 1968 | 47.97 | 54.69 | 62.19 | 65.63 | 73.35 | 84.03 | 94.87 | 84.81 | 83.00 | 66.65 | 52.73 | 43.58 | 67.79 | |||||||||||||
| 1969 | 35.23 | 44.50 | 60.42 | 65.47 | 80.16 | 84.73 | 90.94 | 91.13 | 82.37 | 65.42 | 56.23 | 43.32 | 66.66 | |||||||||||||
| 1970 | 44.81 | 52.54 | 59.13 | 60.20 | 78.45 | 87.60 | 94.10 | 94.58 | 77.43 | 67.45 | 52.13 | 46.26 | 67.89 | |||||||||||||
| 1971 | 49.61 | 52.04 | 54.65 | 65.17 | 75.94 | 80.00 | 95.16 | 96.94 | 78.67 | 66.48 | 54.23 | 47.23 | 68.01 | |||||||||||||
| 1972 | 45.68 | 52.07 | 62.35 | 62.63 | 79.45 | 86.37 | 93.58 | 93.26 | 78.57 | 67.77 | 53.80 | 39.58 | 67.93 | |||||||||||||
| 1973 | 43.06 | 51.11 | 58.87 | 68.67 | 79.26 | 84.07 | 95.84 | 90.60 | a | 81.77 | 68.16 | 49.37 | 49.97 | 68.39 | ||||||||||||
| 1974 | 40.90 | 55.04 | 58.52 | 65.93 | 72.45 | 90.73 | 91.29 | 93.35 | 88.93 | 71.71 | 55.27 | 49.03 | 69.43 | |||||||||||||
| 1975 | 49.65 | 47.50 | 54.42 | 59.93 | 75.32 | 81.33 | 94.32 | 87.03 | 86.97 | 66.71 | 53.87 | 48.71 | 67.15 | |||||||||||||
| 1976 | 50.48 | 51.41 | 56.87 | 63.47 | 78.29 | 80.70 | 92.81 | 85.90 | 86.90 | 72.71 | 55.57 | 47.48 | 68.55 | |||||||||||||
| 1977 | 41.45 | 55.86 | 58.90 | 74.37 | 68.68 | 88.27 | 89.42 | 92.06 | 76.53 | 68.55 | 50.77 | 46.03 | 67.57 | |||||||||||||
| 1978 | 43.45 | 52.57 | 63.00 | 64.07 | 71.26 | 84.47 | 91.65 | 87.71 | 76.47 | 73.58 | 46.97 | 43.81 | 66.58 | |||||||||||||
| 1979 | 27.61 | 48.54 | 62.10 | 64.30 | 78.77 | 86.03 | 93.90 | 88.61 | 86.63 | 79.88 | o | 46.17 | g | 52.00 | 68.85 | |||||||||||
| 1980 | 41.07 | a | 48.21 | ----- | z | 68.70 | 74.06 | 77.77 | 92.87 | ----- | z | 82.03 | 69.45 | 54.97 | 54.22 | m | 67.68 | |||||||||
| 1981 | 45.16 | 52.14 | 60.84 | 67.17 | 73.39 | 80.23 | 90.42 | 97.00 | 81.67 | i | 68.53 | a | 56.07 | 45.74 | 66.97 | |||||||||||
| 1982 | 44.35 | 50.25 | 58.71 | 64.03 | 75.87 | 85.53 | 89.65 | 90.74 | 77.30 | 65.84 | 49.30 | 43.58 | 66.26 | |||||||||||||
| 1983 | 50.06 | 52.14 | 59.32 | 65.43 | 78.35 | 81.27 | 86.48 | 92.97 | 79.31 | n | 70.48 | 54.63 | 33.74 | 65.90 | ||||||||||||
| 1984 | 45.71 | 53.17 | 60.81 | 61.67 | 74.23 | 81.23 | 95.90 | 93.71 | 80.63 | 63.90 | 50.43 | 42.84 | 67.02 | |||||||||||||
| 1985 | 39.26 | 52.36 | 59.16 | 72.43 | 77.58 | 87.50 | 100.71 | 91.42 | 75.63 | 68.65 | 42.47 | 31.84 | 66.58 | |||||||||||||
| 1986 | 45.40 | a | 50.43 | 64.74 | 66.00 | 78.26 | 91.57 | 88.48 | 98.45 | 75.70 | 72.68 | 53.87 | 43.06 | 69.05 | ||||||||||||
| 1987 | 43.84 | 53.12 | b | 60.94 | 76.03 | 81.26 | 91.69 | a | 88.07 | a | 94.45 | 89.20 | 77.03 | 54.73 | 44.80 | a | 71.26 | |||||||||
| 1988 | 42.48 | 58.24 | 62.45 | 71.03 | 77.55 | 84.79 | a | 95.48 | 96.00 | 86.80 | 81.23 | 54.80 | 47.35 | 71.52 | ||||||||||||
| 1989 | 52.74 | 43.57 | 57.61 | 73.07 | 76.00 | 87.30 | 93.68 | 90.00 | 87.57 | 70.58 | 59.50 | 47.19 | 69.90 | |||||||||||||
| 1990 | 51.19 | 54.32 | 65.10 | 76.90 | 75.32 | 85.70 | 98.23 | 94.23 | 92.40 | 70.32 | 59.40 | 41.23 | 72.03 | |||||||||||||
| 1991 | 47.39 | 61.86 | 60.10 | 67.43 | 73.61 | 80.50 | 98.48 | 96.74 | 91.90 | 74.84 | 54.97 | 47.61 | 71.29 | |||||||||||||
| 1992 | 52.00 | 56.93 | 68.16 | 71.43 | 86.55 | ----- | z | 95.55 | 97.65 | 86.27 | 72.87 | 53.40 | 42.16 | 71.18 | ||||||||||||
| 1993 | 37.42 | 42.14 | 58.71 | 65.57 | 82.71 | 82.60 | 83.94 | 91.90 | 90.07 | 74.94 | 50.07 | 46.42 | 67.21 | |||||||||||||
| 1994 | 54.13 | 51.75 | 66.29 | 73.23 | 81.00 | 87.20 | 100.32 | 95.29 | 90.03 | 71.23 | 52.67 | 48.65 | 72.65 | |||||||||||||
| 1995 | 45.06 | 59.25 | 60.52 | 67.30 | 79.35 | 83.53 | 93.87 | 91.45 | 88.50 | 70.94 | 59.13 | 44.90 | 70.32 | |||||||||||||
| 1996 | 47.03 | 50.52 | 61.71 | 70.60 | 73.94 | 87.37 | 99.55 | 96.68 | 84.00 | 71.19 | 56.17 | 47.97 | a | 70.56 | ||||||||||||
| 1997 | 45.68 | 52.61 | 63.10 | 67.47 | 82.87 | 79.33 | 91.68 | 96.55 | 84.53 | 70.03 | 56.03 | 46.81 | 69.72 | |||||||||||||
| 1998 | 49.10 | 54.79 | 62.06 | 69.03 | 72.32 | 86.03 | 100.16 | 100.48 | ----- | z | 71.32 | 56.70 | 49.52 | 70.14 | ||||||||||||
| 1999 | 51.77 | 53.93 | 58.94 | 68.83 | 75.45 | 85.97 | 97.87 | 97.55 | 89.80 | 75.26 | 59.13 | 49.55 | 72.00 | |||||||||||||
| 2000 | 44.62 | j | 51.10 | 62.03 | 75.13 | 77.45 | 90.73 | 96.65 | 98.23 | 87.90 | 72.03 | 48.30 | 44.48 | 73.09 | ||||||||||||
| 2001 | 45.52 | 51.96 | 65.35 | 67.24 | a | 87.39 | 85.00 | 95.35 | 99.48 | 92.80 | 72.61 | 57.03 | 45.16 | 72.08 | ||||||||||||
| 2002 | 47.90 | 58.43 | 59.65 | 68.80 | 72.84 | 83.97 | 93.23 | 88.19 | 82.27 | 65.45 | 53.00 | 44.77 | 68.21 | |||||||||||||
| 2003 | 47.65 | 49.75 | 59.58 | 60.67 | 73.52 | 85.50 | 96.13 | 91.16 | 84.40 | 72.87 | 47.77 | 43.81 | 67.73 | |||||||||||||
| 2004 | 34.90 | 49.62 | 63.61 | 68.70 | 71.68 | 82.47 | 92.94 | 89.68 | 78.10 | 67.35 | 52.80 | 46.71 | 66.55 | |||||||||||||
| 2005 | 43.10 | 50.46 | 61.90 | 62.57 | 71.65 | 74.93 | 91.06 | 91.77 | 79.40 | 66.84 | 47.80 | 33.94 | 64.62 | |||||||||||||
| 2006 | 49.26 | 46.96 | 52.45 | 63.70 | 73.06 | 80.97 | 95.32 | 89.03 | 82.40 | 67.26 | 52.50 | 43.19 | 66.34 | |||||||||||||
| 2007 | 40.52 | 48.21 | 62.71 | 63.20 | 75.00 | 81.40 | 94.00 | 88.26 | 79.63 | 63.53 | a | 50.14 | b | 45.35 | 66.00 | |||||||||||
| 2008 | ----- | z | 54.91 | f | 55.29 | 58.90 | 71.45 | 80.24 | a | 92.32 | 89.10 | 82.23 | ----- | z | 55.63 | 41.06 | 69.58 | |||||||||
| 2009 | 44.65 | 45.86 | 52.29 | 63.03 | 74.16 | 82.00 | 94.77 | 91.10 | 85.80 | 61.84 | 54.20 | 37.55 | 65.60 | |||||||||||||
| 2010 | 46.65 | 50.29 | 58.77 | 60.80 | 66.94 | 76.07 | 90.94 | 89.19 | 79.43 | 67.61 | 51.50 | 42.67 | a | 65.07 | ||||||||||||
| 2011 | 47.65 | 48.64 | 54.68 | 58.73 | 66.77 | 77.50 | 86.52 | 92.65 | 86.43 | 67.87 | 55.03 | 46.26 | 65.73 | |||||||||||||
| 2012 | 48.71 | 48.31 | 54.84 | 65.20 | 72.61 | 76.47 | 91.74 | 94.32 | 86.23 | 68.00 | 53.97 | 44.48 | 67.07 | |||||||||||||
| 2013 | 41.00 | 52.04 | 58.84 | 72.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.00 | z | 50.62 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 45.29 | 51.92 | 59.77 | 66.56 | 75.42 | 83.67 | 93.38 | 92.45 | 83.65 | 69.86 | 53.36 | 44.69 | 68.22 | |||||||||||||
| S.D. | 5.03 | 3.97 | 3.35 | 4.55 | 4.42 | 3.94 | 3.66 | 3.90 | 4.75 | 3.62 | 3.39 | 4.00 | 2.08 | |||||||||||||
| SKEW | -1.00 | 0.03 | -0.03 | 0.25 | 0.44 | 0.00 | -0.21 | 0.15 | 0.02 | 0.45 | -0.72 | -1.23 | 0.56 | |||||||||||||
| MAX | 54.13 | 61.86 | 68.16 | 76.90 | 87.39 | 91.69 | 100.71 | 100.48 | 92.80 | 81.23 | 59.50 | 52.00 | 72.65 | |||||||||||||
| MIN | 27.61 | 42.14 | 52.29 | 58.40 | 66.77 | 74.93 | 83.94 | 84.81 | 75.63 | 61.84 | 42.47 | 31.84 | 64.62 | |||||||||||||
| NO YRS | 52 | 54 | 54 | 54 | 54 | 53 | 54 | 54 | 52 | 53 | 54 | 53 | 44 | |||||||||||||