| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | 63.29 | 66.90 | 81.61 | 76.87 | 73.60 | 63.35 | 50.55 | a | 48.74 | 65.62 | ||||||||
| 1981 | 39.48 | d | 47.21 | 51.81 | 57.37 | 62.74 | 70.17 | 79.03 | 86.13 | 75.34 | a | 59.73 | a | 51.47 | 42.55 | 60.25 | ||||||||||
| 1982 | 38.29 | 44.11 | a | 50.84 | 54.37 | 64.16 | 72.57 | 77.77 | 79.81 | 68.40 | 58.81 | 44.83 | 39.03 | 57.75 | ||||||||||||
| 1983 | 46.74 | 47.36 | 51.35 | 54.67 | 67.39 | 70.43 | 74.29 | 81.71 | 70.27 | 63.97 | 48.80 | 30.74 | 58.98 | |||||||||||||
| 1984 | 43.48 | 48.28 | 54.45 | 52.97 | 63.00 | 68.43 | 82.32 | 82.06 | 70.43 | 56.10 | 45.53 | 38.68 | 58.81 | |||||||||||||
| 1985 | 38.50 | a | 43.68 | 51.58 | 63.53 | 67.10 | 75.57 | 88.58 | 80.23 | 67.10 | 62.97 | 37.63 | 35.58 | 59.34 | ||||||||||||
| 1986 | 45.55 | 45.00 | 58.26 | 57.20 | 66.16 | 79.93 | 76.32 | 86.00 | 65.23 | 65.03 | 50.77 | 39.71 | 61.26 | |||||||||||||
| 1987 | 41.97 | 47.64 | 52.45 | 66.27 | 70.00 | 78.67 | 76.74 | 80.32 | 77.50 | 70.81 | 51.86 | a | 38.94 | 62.76 | ||||||||||||
| 1988 | 40.06 | 51.69 | 54.16 | 61.53 | 64.42 | 72.33 | 84.13 | 83.74 | 76.23 | 72.90 | 47.83 | 44.48 | 62.79 | |||||||||||||
| 1989 | 43.71 | 36.32 | 51.16 | 62.40 | 64.10 | 77.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.80 | |||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.98 | 45.70 | 52.90 | 58.92 | 65.24 | 73.21 | 80.09 | 81.87 | 71.57 | 63.74 | 47.70 | 39.83 | 60.24 | |||||||||||||
| S.D. | 3.09 | 4.28 | 2.39 | 4.66 | 2.35 | 4.43 | 4.49 | 3.02 | 4.31 | 5.42 | 4.53 | 5.15 | 1.87 | |||||||||||||
| SKEW | 0.22 | -1.00 | 1.36 | 0.21 | 0.81 | 0.17 | 0.57 | 0.05 | -0.01 | 0.41 | -1.24 | 0.00 | 0.28 | |||||||||||||
| MAX | 46.74 | 51.69 | 58.26 | 66.27 | 70.00 | 79.93 | 88.58 | 86.13 | 77.50 | 72.90 | 51.86 | 48.74 | 62.79 | |||||||||||||
| MIN | 38.29 | 36.32 | 50.84 | 52.97 | 62.74 | 66.90 | 74.29 | 76.87 | 65.23 | 56.10 | 37.63 | 30.74 | 57.75 | |||||||||||||
| NO YRS | 9 | 9 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | |||||||||||||