| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.77 | e | 54.27 | 42.32 | 53.12 | |||
| 1973 | 43.87 | 53.29 | 54.21 | b | 62.83 | 70.84 | 72.87 | 82.19 | 76.84 | 74.87 | 61.65 | ----- | z | 49.39 | 63.89 | |||||||||||
| 1974 | 42.61 | 47.79 | 54.65 | 58.55 | a | 61.93 | a | 74.79 | a | 77.19 | 81.45 | 82.17 | 69.19 | 54.83 | 49.10 | 62.85 | ||||||||||
| 1975 | 46.97 | 46.96 | 52.39 | 55.53 | 67.77 | 72.00 | a | 79.68 | 75.31 | b | 79.17 | 60.13 | 51.40 | 48.74 | 61.34 | |||||||||||
| 1976 | 48.39 | 49.62 | 52.03 | 58.63 | 67.87 | 69.63 | 77.90 | 74.61 | 75.03 | 65.81 | 57.53 | 45.35 | 61.87 | |||||||||||||
| 1977 | 46.42 | 53.93 | 52.19 | 64.83 | 62.65 | 75.10 | a | 77.35 | 84.71 | 69.20 | 63.71 | 50.87 | 48.29 | 62.44 | ||||||||||||
| 1978 | 46.23 | 52.54 | 59.58 | 60.20 | 64.65 | 76.57 | 80.10 | 78.61 | 69.21 | a | 67.52 | 48.40 | 43.29 | 62.24 | ||||||||||||
| 1979 | 37.19 | 47.36 | 59.55 | 60.23 | 69.68 | 76.07 | 81.26 | 78.45 | 76.83 | 65.97 | a | 51.80 | 50.30 | a | 62.89 | |||||||||||
| 1980 | 42.94 | 49.43 | a | 53.27 | a | 63.53 | 66.48 | 67.33 | 78.84 | 77.26 | 74.43 | 66.74 | 54.67 | 49.93 | a | 62.07 | ||||||||||
| 1981 | 51.94 | 51.04 | a | 58.71 | 59.90 | 66.26 | 69.17 | 77.32 | 84.55 | 76.50 | 62.87 | 56.21 | a | 48.87 | a | 63.61 | ||||||||||
| 1982 | 42.74 | 49.21 | 55.84 | 57.73 | 68.06 | 75.93 | 76.77 | 79.16 | 72.90 | 64.00 | 50.60 | 46.71 | 61.64 | |||||||||||||
| 1983 | 49.06 | 53.07 | 57.68 | 62.67 | 71.00 | 70.20 | 74.61 | 78.90 | 72.03 | 63.48 | 53.70 | 39.81 | 62.18 | |||||||||||||
| 1984 | 49.90 | 53.28 | 58.19 | 57.50 | 64.29 | 70.47 | 80.35 | 80.48 | 72.73 | 59.13 | 51.67 | 42.97 | 61.75 | |||||||||||||
| 1985 | 44.23 | 47.89 | 54.16 | 63.03 | ----- | z | ----- | z | 85.45 | 79.97 | 69.20 | 61.81 | 43.73 | 43.60 | a | 59.31 | ||||||||||
| 1986 | 51.06 | 50.62 | b | 62.16 | 59.53 | 67.23 | 76.70 | 74.32 | 85.13 | 69.67 | 66.10 | 52.93 | 47.52 | 63.58 | ||||||||||||
| 1987 | 47.58 | 53.00 | 56.65 | 65.57 | 69.90 | 78.83 | 76.29 | 82.30 | a | 77.60 | 71.32 | 55.07 | 43.55 | 64.80 | ||||||||||||
| 1988 | 44.90 | 54.21 | 56.32 | 61.10 | 65.19 | 71.97 | 80.84 | 80.00 | 75.37 | 66.81 | 51.00 | 46.55 | 62.85 | |||||||||||||
| 1989 | 46.90 | 44.21 | 52.48 | 66.73 | 67.48 | 74.97 | 74.87 | 75.03 | 77.77 | 62.77 | 53.60 | 45.87 | 61.89 | |||||||||||||
| 1990 | 48.81 | 46.86 | 58.84 | 64.47 | 64.68 | 72.90 | 84.35 | 81.23 | 76.30 | 60.16 | 52.80 | 41.19 | 62.72 | |||||||||||||
| 1991 | 48.23 | 57.79 | 55.06 | ----- | z | 61.65 | 67.90 | 81.74 | 81.26 | 79.20 | 67.00 | 52.77 | 47.13 | a | 63.61 | |||||||||||
| 1992 | ----- | z | 57.76 | 64.32 | 64.93 | 74.52 | 77.70 | 80.13 | 82.71 | 72.37 | 64.74 | 51.40 | 43.68 | 66.75 | ||||||||||||
| 1993 | 42.06 | 48.11 | 56.55 | 59.23 | 70.23 | 70.50 | 70.90 | 77.81 | 78.47 | 67.10 | 47.80 | 47.16 | 61.33 | |||||||||||||
| 1994 | 49.33 | a | 48.39 | 60.71 | 62.13 | 69.87 | 70.13 | 81.52 | 78.97 | 77.30 | 62.39 | 46.33 | 47.06 | 62.85 | ||||||||||||
| 1995 | 49.23 | 55.26 | a | 56.81 | 59.30 | 70.00 | 72.13 | 79.06 | 76.00 | 75.20 | 61.32 | 56.53 | 46.81 | 63.14 | ||||||||||||
| 1996 | 45.61 | 48.45 | 56.77 | 60.73 | 62.03 | 72.03 | 83.29 | 80.81 | 70.57 | 60.33 | a | 50.97 | 47.17 | a | 61.56 | |||||||||||
| 1997 | 47.10 | 50.14 | 53.32 | 58.93 | 72.13 | 71.07 | 78.97 | 86.69 | r | ----- | z | 60.33 | z | 57.90 | 47.81 | 59.71 | ||||||||||
| 1998 | 48.87 | 54.82 | 58.19 | 65.10 | 64.16 | 76.17 | 82.00 | 82.23 | 80.00 | 62.03 | 51.87 | 46.20 | a | 64.30 | ||||||||||||
| 1999 | 47.70 | a | 49.32 | 54.84 | 62.87 | 65.45 | 70.50 | 80.74 | 79.19 | 78.21 | a | 65.93 | a | 56.20 | 49.32 | 63.36 | ||||||||||
| 2000 | 46.42 | 51.03 | 55.10 | 65.80 | 67.45 | 76.40 | 77.61 | 78.87 | 74.80 | 62.94 | 50.27 | 47.48 | 62.85 | |||||||||||||
| 2001 | 48.94 | 52.00 | 59.00 | 61.60 | 78.77 | 74.47 | 79.23 | 82.26 | 77.37 | 64.13 | 54.10 | 46.10 | 64.83 | |||||||||||||
| 2002 | 46.77 | 53.79 | 54.81 | 64.37 | 66.74 | 76.64 | b | 83.81 | 83.61 | 78.86 | h | 66.68 | 56.50 | 49.16 | 63.90 | |||||||||||
| 2003 | 53.42 | 54.39 | 56.03 | 59.17 | f | 69.35 | e | 80.47 | ----- | z | 84.00 | h | 81.86 | i | 68.90 | j | 50.57 | g | 47.05 | k | 62.73 | |||||
| 2004 | 43.60 | k | 52.48 | f | 62.06 | 70.56 | e | 68.96 | h | 79.76 | i | 88.24 | n | 84.29 | n | ----- | z | 69.15 | k | ----- | z | 49.57 | h | 66.31 | ||
| 2005 | 49.96 | f | 57.78 | j | 62.50 | g | 59.93 | 68.09 | h | 68.60 | 80.90 | 83.52 | 76.50 | 65.28 | f | 54.63 | 44.29 | g | 70.68 | |||||||
| 2006 | 48.68 | 50.93 | 54.32 | 65.07 | 69.58 | 76.00 | 83.39 | 81.06 | 78.77 | 64.06 | 51.21 | b | 45.26 | 64.03 | ||||||||||||
| 2007 | 44.87 | 50.54 | 58.24 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.70 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.84 | 51.12 | 56.57 | 61.97 | 67.67 | 73.32 | 79.47 | 80.07 | 75.32 | 64.21 | 52.61 | 46.37 | 62.76 | |||||||||||||
| S.D. | 3.24 | 3.21 | 3.09 | 3.25 | 3.77 | 3.39 | 3.24 | 2.87 | 3.50 | 2.86 | 3.21 | 2.64 | 1.02 | |||||||||||||
| SKEW | -0.65 | 0.15 | 0.56 | 0.35 | 0.65 | 0.09 | -0.45 | -0.13 | -0.32 | 0.33 | -0.64 | -0.67 | 0.60 | |||||||||||||
| MAX | 53.42 | 57.79 | 64.32 | 70.56 | 78.77 | 80.47 | 85.45 | 85.13 | 82.17 | 71.32 | 57.90 | 50.30 | 64.83 | |||||||||||||
| MIN | 37.19 | 44.21 | 52.03 | 55.53 | 61.65 | 67.33 | 70.90 | 74.61 | 69.20 | 59.13 | 43.73 | 39.81 | 61.33 | |||||||||||||
| NO YRS | 32 | 33 | 33 | 32 | 31 | 32 | 32 | 31 | 30 | 31 | 32 | 32 | 25 | |||||||||||||