| 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 | 46.06 | 45.27 | 41.32 | 44.22 | ||||
| 1984 | 39.90 | 40.62 | 42.71 | 41.33 | 44.42 | 48.03 | 50.29 | 51.00 | 48.03 | 45.61 | 43.23 | 36.74 | 44.33 | |||||||||||||
| 1985 | 37.00 | 36.89 | 37.97 | 42.90 | 44.61 | 48.10 | 51.84 | 50.37 | a | 48.40 | 43.64 | c | 36.93 | a | 36.58 | 42.94 | ||||||||||
| 1986 | 43.00 | a | 42.45 | f | 43.32 | 40.89 | b | 45.34 | b | 49.24 | a | 51.26 | 50.32 | 47.27 | 46.26 | 42.40 | 37.13 | 45.13 | ||||||||
| 1987 | 36.23 | 38.32 | 40.10 | a | 41.10 | 46.74 | 48.10 | 50.13 | 49.48 | 47.45 | a | 45.16 | 41.97 | 35.62 | b | 43.37 | ||||||||||
| 1988 | 36.65 | 36.10 | 36.00 | 41.53 | 44.26 | 48.17 | 50.16 | 48.65 | 47.13 | 49.45 | b | 42.93 | 37.13 | 43.18 | ||||||||||||
| 1989 | 36.52 | 32.93 | 43.87 | a | 42.93 | b | 44.42 | 49.03 | 52.06 | 52.35 | 45.33 | 42.58 | 39.90 | 36.90 | 43.24 | |||||||||||
| 1990 | 38.84 | 35.79 | 39.68 | 42.23 | 44.23 | 48.85 | c | 51.13 | 52.03 | 50.23 | 42.10 | 40.63 | 30.90 | 43.05 | ||||||||||||
| 1991 | 35.68 | 42.61 | 35.87 | 40.50 | 42.65 | 46.57 | 49.35 | 52.55 | 48.27 | 44.74 | 43.20 | 37.84 | 43.32 | |||||||||||||
| 1992 | 40.52 | 42.31 | 42.42 | 44.80 | 44.84 | 49.60 | 52.10 | 49.35 | 47.43 | 46.19 | 43.03 | 38.61 | 45.10 | |||||||||||||
| 1993 | 35.97 | 37.07 | 44.90 | 44.37 | 48.10 | 49.63 | 51.39 | 51.97 | 47.80 | 45.00 | 36.57 | 37.55 | 44.19 | |||||||||||||
| 1994 | 39.71 | 37.57 | 39.13 | 42.70 | 46.48 | ----- | z | 51.35 | 52.06 | 52.27 | 44.13 | 37.17 | 37.90 | a | 43.68 | |||||||||||
| 1995 | 42.68 | 43.43 | 40.65 | 40.97 | 47.29 | 49.23 | 54.52 | 50.65 | ----- | z | ----- | z | ----- | z | ----- | z | 46.18 | |||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.56 | 38.51 | 40.55 | 42.19 | 45.28 | 48.60 | 51.30 | 50.90 | 48.15 | 45.08 | 41.10 | 37.02 | 43.63 | |||||||||||||
| S.D. | 2.60 | 3.31 | 2.99 | 1.39 | 1.56 | 0.91 | 1.33 | 1.31 | 1.80 | 1.94 | 2.88 | 2.38 | 0.73 | |||||||||||||
| SKEW | 0.52 | 0.10 | -0.22 | 0.64 | 0.32 | -0.93 | 0.90 | -0.29 | 0.98 | 0.55 | -0.48 | -1.03 | 0.85 | |||||||||||||
| MAX | 43.00 | 43.43 | 44.90 | 44.80 | 48.10 | 49.63 | 54.52 | 52.55 | 52.27 | 49.45 | 45.27 | 41.32 | 45.10 | |||||||||||||
| MIN | 35.68 | 32.93 | 35.87 | 40.50 | 42.65 | 46.57 | 49.35 | 48.65 | 45.33 | 42.10 | 36.57 | 30.90 | 42.94 | |||||||||||||
| NO YRS | 12 | 11 | 12 | 12 | 12 | 11 | 12 | 12 | 11 | 12 | 12 | 12 | 9 | |||||||||||||