| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.20 | 52.13 | 43.40 | 28.65 | 46.34 | |||||
| 1968 | 31.06 | 40.59 | 40.10 | 43.10 | 52.65 | 63.77 | 69.10 | 64.84 | 60.77 | 51.06 | 39.17 | 27.71 | 48.66 | |||||||||||||
| 1969 | 36.52 | 32.07 | 34.55 | 43.97 | 54.97 | 60.27 | 68.48 | 69.23 | 62.30 | 47.35 | 39.80 | 32.58 | 48.51 | |||||||||||||
| 1970 | 30.35 | 36.79 | 37.52 | 40.31 | a | 54.13 | a | 62.54 | b | 71.03 | a | 68.75 | c | 57.86 | b | 47.50 | a | 40.00 | d | 31.67 | a | 48.20 | ||||
| 1971 | 30.39 | 34.60 | c | 37.97 | a | 43.90 | a | 47.79 | b | 60.33 | 69.52 | 68.80 | a | 60.77 | 45.83 | a | 37.11 | b | 30.71 | 47.31 | ||||||
| 1972 | 28.97 | b | 36.36 | a | 44.35 | 46.50 | 52.94 | 64.17 | 72.00 | 66.55 | 60.50 | 49.16 | 35.37 | 29.29 | 48.85 | |||||||||||
| 1973 | 29.58 | 35.46 | 35.10 | 40.63 | 55.19 | 62.83 | 69.70 | a | 68.54 | c | 57.40 | 46.68 | 39.38 | a | 34.16 | 47.89 | ||||||||||
| 1974 | 30.00 | 32.75 | 41.29 | 42.97 | 54.57 | a | 64.46 | b | 69.42 | 66.35 | 62.57 | 49.45 | 37.60 | 28.58 | 48.33 | |||||||||||
| 1975 | 27.81 | 29.89 | 34.42 | 36.13 | 49.23 | 61.53 | 68.26 | 65.10 | 60.93 | 46.10 | 35.53 | 30.68 | 45.47 | |||||||||||||
| 1976 | 30.39 | 35.41 | 33.16 | 39.93 | 55.71 | 61.77 | 69.48 | 65.35 | 59.77 | 47.32 | 38.50 | 29.65 | 47.20 | |||||||||||||
| 1977 | 30.23 | 33.86 | 31.68 | 45.43 | 47.58 | 63.30 | 70.03 | 68.45 | 61.79 | a | 54.55 | 41.20 | 37.52 | 48.80 | ||||||||||||
| 1978 | 33.42 | 34.50 | 41.65 | 41.97 | 50.26 | 65.77 | 70.94 | 69.58 | 61.00 | 55.61 | 37.40 | 25.52 | 48.97 | |||||||||||||
| 1979 | 25.19 | 29.07 | a | 35.61 | 43.53 | 53.00 | 63.43 | 70.26 | 66.52 | 64.57 | 52.13 | 35.80 | 34.03 | 47.76 | ||||||||||||
| 1980 | 37.19 | 38.34 | 37.32 | 44.30 | 49.23 | 60.43 | 69.87 | 68.77 | 60.00 | 49.55 | 40.13 | 36.97 | 49.34 | |||||||||||||
| 1981 | 34.32 | 34.61 | 37.29 | 48.37 | 55.48 | 68.47 | 72.68 | 68.58 | 63.56 | c | 48.07 | c | 41.53 | 36.55 | 50.79 | |||||||||||
| 1982 | 31.55 | 36.71 | 38.19 | 43.87 | 53.13 | 60.10 | 67.84 | 68.03 | 59.60 | 46.03 | 38.03 | 30.61 | 47.81 | |||||||||||||
| 1983 | 32.74 | 36.04 | 39.48 | 39.13 | 50.03 | 60.03 | 67.77 | 65.00 | 63.37 | 50.13 | 38.80 | 34.29 | 48.07 | |||||||||||||
| 1984 | 32.06 | 32.10 | 37.19 | 43.87 | 59.61 | 62.53 | 68.29 | 66.32 | 61.93 | 44.81 | 35.20 | 31.58 | 47.96 | |||||||||||||
| 1985 | 28.61 | 31.18 | 37.19 | 47.37 | 53.74 | 63.37 | 69.35 | 66.32 | 55.03 | 48.32 | 36.43 | 33.00 | 47.49 | |||||||||||||
| 1986 | 36.52 | 37.18 | 42.39 | 45.03 | 53.39 | 64.20 | 66.58 | 69.81 | 56.17 | 47.71 | 38.70 | 31.90 | 49.13 | |||||||||||||
| 1987 | 28.48 | 33.50 | 36.65 | 47.57 | 53.81 | 64.23 | 65.68 | 67.10 | 61.10 | 54.55 | 39.90 | 29.16 | 48.48 | |||||||||||||
| 1988 | 31.77 | 36.69 | 37.87 | 45.13 | 52.84 | 64.47 | 71.35 | 66.63 | a | 59.13 | 55.52 | 40.17 | 30.90 | 49.37 | ||||||||||||
| 1989 | 30.32 | 34.79 | 43.55 | 53.27 | 55.58 | 63.73 | 71.48 | 68.13 | 61.63 | 49.32 | 41.00 | 32.65 | 50.45 | |||||||||||||
| 1990 | 31.39 | 30.82 | 41.58 | 47.00 | 53.10 | 65.37 | 69.55 | 65.77 | 61.50 | 51.52 | 39.57 | ----- | z | 50.65 | ||||||||||||
| 1991 | 30.94 | 39.46 | 33.84 | 44.23 | 50.97 | 59.53 | 69.13 | 67.29 | 63.17 | 53.58 | 40.13 | 33.42 | 48.81 | |||||||||||||
| 1992 | 32.13 | 38.41 | 40.35 | 48.17 | 55.42 | 60.53 | 68.77 | 68.03 | 63.23 | 53.23 | 37.23 | 32.06 | 49.80 | |||||||||||||
| 1993 | 34.61 | 35.50 | 41.68 | 46.50 | 54.39 | 60.37 | 65.90 | 65.84 | 61.14 | i | ----- | z | ----- | z | ----- | z | 50.60 | |||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.41 | 34.87 | 38.15 | 44.31 | 53.03 | 62.75 | 69.33 | 67.30 | 60.80 | 49.89 | 38.73 | 31.75 | 48.48 | |||||||||||||
| S.D. | 2.81 | 2.90 | 3.32 | 3.48 | 2.76 | 2.18 | 1.73 | 1.51 | 2.28 | 3.22 | 2.08 | 2.91 | 1.11 | |||||||||||||
| SKEW | 0.31 | -0.14 | 0.03 | 0.04 | -0.19 | 0.44 | -0.27 | -0.06 | -0.82 | 0.33 | 0.00 | 0.13 | -0.24 | |||||||||||||
| MAX | 37.19 | 40.59 | 44.35 | 53.27 | 59.61 | 68.47 | 72.68 | 69.81 | 64.57 | 55.61 | 43.40 | 37.52 | 50.79 | |||||||||||||
| MIN | 25.19 | 29.07 | 31.68 | 36.13 | 47.58 | 59.53 | 65.68 | 64.84 | 55.03 | 44.81 | 35.20 | 25.52 | 45.47 | |||||||||||||
| NO YRS | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 24 | |||||||||||||