| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.03 | 51.63 | 47.11 | 51.26 | ||||
| 1984 | 48.55 | 48.60 | 50.82 | 48.73 | 52.31 | 54.10 | 58.19 | 59.50 | 59.00 | 53.89 | 50.20 | 44.29 | 52.35 | |||||||||||||
| 1985 | 46.68 | 45.02 | 45.19 | 50.70 | 52.77 | 57.07 | 60.60 | 59.18 | a | 57.38 | 53.77 | c | 44.29 | a | 45.95 | 51.55 | ||||||||||
| 1986 | 50.62 | a | 49.16 | f | 51.81 | 48.86 | b | 53.50 | b | 57.60 | a | 59.02 | 59.13 | 56.40 | 54.47 | 50.97 | 47.79 | 53.65 | ||||||||
| 1987 | 45.94 | 47.80 | 49.25 | a | 51.09 | b | 54.80 | a | 56.47 | 58.06 | 59.08 | 56.66 | a | 55.55 | b | 51.07 | 43.84 | c | 52.47 | |||||||
| 1988 | 45.68 | 46.24 | 45.97 | 49.85 | 52.79 | 56.22 | a | 59.45 | 57.62 | a | 57.58 | 57.03 | b | 50.22 | 46.15 | 52.07 | ||||||||||
| 1989 | 44.10 | 41.23 | 49.32 | a | 53.43 | b | 53.13 | 57.88 | 59.52 | 60.55 | 56.90 | 53.52 | 50.07 | 47.27 | 52.24 | |||||||||||
| 1990 | 46.23 | 44.32 | 48.44 | 50.52 | 52.90 | 56.69 | c | 60.27 | 60.66 | 60.08 | 52.58 | 49.12 | 40.11 | 51.83 | ||||||||||||
| 1991 | 45.11 | 51.91 | 44.84 | 48.38 | 50.45 | 55.07 | 59.74 | 60.16 | 60.28 | 56.58 | 51.17 | 46.81 | 52.54 | |||||||||||||
| 1992 | 48.92 | 51.66 | 51.53 | 53.93 | 56.26 | 58.42 | 60.87 | 60.15 | 58.58 | 56.32 | 50.12 | 44.97 | 54.31 | |||||||||||||
| 1993 | 44.03 | 46.39 | 51.34 | 51.07 | 55.58 | 57.68 | 59.50 | 60.56 | 57.20 | 55.44 | 47.23 | 46.52 | 52.71 | |||||||||||||
| 1994 | 48.47 | 44.93 | 48.37 | 50.28 | 54.44 | ----- | z | 59.82 | 61.47 | 61.27 | 54.34 | 44.88 | 44.92 | a | 52.11 | |||||||||||
| 1995 | 49.52 | 50.88 | 48.55 | 49.22 | 53.65 | 56.90 | 61.87 | 60.10 | ----- | z | ----- | z | ----- | z | ----- | z | 53.83 | |||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.99 | 47.18 | 48.79 | 50.50 | 53.55 | 56.74 | 59.74 | 59.85 | 58.30 | 54.88 | 49.25 | 45.48 | 52.45 | |||||||||||||
| S.D. | 2.17 | 3.37 | 2.42 | 1.74 | 1.56 | 1.26 | 1.08 | 1.01 | 1.65 | 1.36 | 2.46 | 2.09 | 0.79 | |||||||||||||
| SKEW | 0.16 | -0.02 | -0.38 | 0.76 | -0.05 | -0.82 | 0.09 | -0.69 | 0.54 | 0.04 | -1.13 | -1.39 | 1.39 | |||||||||||||
| MAX | 50.62 | 51.91 | 51.81 | 53.93 | 56.26 | 58.42 | 61.87 | 61.47 | 61.27 | 57.03 | 51.63 | 47.79 | 54.31 | |||||||||||||
| MIN | 44.03 | 41.23 | 44.84 | 48.38 | 50.45 | 54.10 | 58.06 | 57.62 | 56.40 | 52.58 | 44.29 | 40.11 | 51.55 | |||||||||||||
| NO YRS | 12 | 11 | 12 | 12 | 12 | 11 | 12 | 12 | 11 | 12 | 12 | 12 | 9 | |||||||||||||