| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.74 | j | 37.62 | 36.44 | 37.03 | |||
| 1974 | ----- | z | 36.55 | 40.25 | a | 45.25 | 49.97 | 63.84 | a | 65.02 | 65.05 | 59.35 | 48.03 | 39.68 | 31.58 | 49.51 | ||||||||||
| 1975 | 29.13 | a | 31.43 | 36.76 | 39.47 | 50.52 | 56.93 | 67.85 | 62.73 | 58.40 | 48.63 | 37.30 | 34.92 | 46.17 | ||||||||||||
| 1976 | 31.76 | 33.24 | 35.95 | 43.87 | 53.81 | 55.93 | 65.18 | 59.45 | 60.25 | 48.82 | 40.48 | 32.66 | 46.78 | |||||||||||||
| 1977 | 23.56 | 38.23 | 36.34 | 48.67 | 47.94 | 63.65 | 64.19 | 68.24 | 55.68 | 48.52 | 38.90 | 36.37 | 47.52 | |||||||||||||
| 1978 | 35.61 | 38.48 | 45.23 | 45.50 | 50.27 | 59.95 | 66.13 | 63.29 | 56.75 | 49.03 | 32.37 | 24.55 | 47.26 | |||||||||||||
| 1979 | 16.76 | 35.20 | 41.48 | 45.83 | 53.85 | 60.55 | 66.58 | 65.58 | 60.70 | 50.92 | 34.38 | 37.11 | 47.41 | |||||||||||||
| 1980 | ----- | z | 38.43 | 38.11 | 49.15 | 53.27 | 55.97 | 65.58 | 61.13 | 58.67 | 48.71 | 39.00 | 36.74 | 49.52 | ||||||||||||
| 1981 | 35.71 | 36.29 | 40.59 | c | 46.52 | 50.66 | 57.18 | 63.05 | 66.66 | 57.63 | 45.56 | 41.70 | 35.13 | 48.06 | ||||||||||||
| 1982 | 30.15 | 32.20 | 38.94 | 42.40 | 50.61 | 61.78 | 63.44 | 65.73 | 55.03 | 47.45 | 34.96 | b | 31.56 | 46.19 | ||||||||||||
| 1983 | 37.06 | 41.11 | 43.61 | 44.57 | 54.55 | 58.08 | 63.47 | 68.35 | 54.50 | 49.45 | 42.23 | 20.81 | 48.15 | |||||||||||||
| 1984 | 27.10 | 32.61 | a | 41.65 | 44.73 | 50.66 | 57.08 | 66.37 | 67.37 | 55.03 | 43.90 | 40.40 | 24.71 | 45.97 | ||||||||||||
| 1985 | 20.50 | 25.34 | ----- | z | 48.05 | ----- | z | 60.23 | 70.27 | 61.40 | 50.78 | 45.58 | 25.22 | 19.13 | 42.65 | |||||||||||
| 1986 | 34.11 | 37.89 | 44.32 | 44.88 | 53.40 | a | 63.95 | 62.39 | 68.48 | 53.03 | 48.68 | 37.35 | 29.87 | 48.20 | ||||||||||||
| 1987 | 27.56 | 35.77 | 41.02 | 51.30 | 55.44 | 62.27 | 63.06 | 63.61 | 60.03 | 49.98 | 39.15 | 33.21 | 48.53 | |||||||||||||
| 1988 | 30.71 | 35.83 | 41.71 | 51.27 | 53.71 | 58.58 | 65.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.17 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 29.21 | 35.24 | 40.43 | 46.10 | 52.05 | 59.73 | 65.20 | 64.79 | 56.85 | 48.09 | 37.38 | 30.99 | 47.30 | |||||||||||||
| S.D. | 6.11 | 3.85 | 2.92 | 3.20 | 2.20 | 2.87 | 2.09 | 2.93 | 2.96 | 1.90 | 4.33 | 5.96 | 0.91 | |||||||||||||
| SKEW | -0.62 | -0.99 | -0.05 | -0.07 | -0.16 | 0.18 | 0.82 | -0.29 | -0.46 | -0.84 | -1.54 | -0.82 | -0.24 | |||||||||||||
| MAX | 37.06 | 41.11 | 45.23 | 51.30 | 55.44 | 63.95 | 70.27 | 68.48 | 60.70 | 50.92 | 42.23 | 37.11 | 48.53 | |||||||||||||
| MIN | 16.76 | 25.34 | 35.95 | 39.47 | 47.94 | 55.93 | 62.39 | 59.45 | 50.78 | 43.90 | 25.22 | 19.13 | 45.97 | |||||||||||||
| NO YRS | 13 | 15 | 14 | 15 | 14 | 15 | 15 | 14 | 14 | 14 | 15 | 15 | 11 | |||||||||||||