| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.12 | 67.05 | 56.97 | 38.56 | 59.17 | |||||
| 1968 | 43.18 | 52.14 | 52.87 | 56.88 | 67.37 | 77.97 | 81.92 | 77.56 | 75.47 | 64.97 | 51.78 | 39.60 | 61.81 | |||||||||||||
| 1969 | 46.39 | 43.12 | 47.11 | 58.12 | 69.58 | 74.35 | 81.89 | 84.02 | 76.28 | 60.00 | 51.83 | 45.97 | 61.55 | |||||||||||||
| 1970 | 42.81 | 49.82 | 49.60 | 53.14 | b | 68.37 | a | 77.07 | b | 84.37 | a | 81.98 | c | 72.30 | b | 61.02 | a | 53.24 | e | 42.05 | b | 61.31 | ||||
| 1971 | 42.87 | 47.69 | d | 51.91 | c | 57.21 | b | 61.39 | c | 75.03 | 83.85 | 79.95 | a | 74.45 | 58.77 | a | 48.96 | d | 40.15 | 60.19 | ||||||
| 1972 | 41.90 | b | 49.84 | a | 59.58 | 60.18 | 67.82 | 77.00 | 85.48 | 79.90 | a | 73.57 | a | 59.35 | 46.40 | 40.03 | 61.76 | |||||||||
| 1973 | 39.05 | 45.45 | 44.65 | 54.47 | 69.26 | 78.32 | 83.47 | a | 82.06 | d | 72.98 | 62.52 | 50.43 | a | 45.65 | 60.69 | ||||||||||
| 1974 | 40.56 | 45.23 | 53.27 | 57.18 | 68.85 | a | 80.34 | b | 81.71 | 80.21 | 76.30 | 63.87 | 50.65 | 40.61 | 61.57 | |||||||||||
| 1975 | 41.00 | 42.70 | 46.48 | 49.23 | 63.89 | 75.88 | 81.89 | 80.15 | 75.62 | 61.39 | 49.78 | 43.81 | 59.32 | |||||||||||||
| 1976 | 43.98 | 47.95 | 46.79 | 53.27 | 69.40 | 75.98 | 81.92 | 79.39 | 71.23 | 60.27 | 52.80 | 43.90 | 60.57 | |||||||||||||
| 1977 | 41.26 | 48.91 | 45.50 | 60.03 | 60.03 | 77.90 | 83.10 | 81.34 | 75.29 | a | 67.73 | 54.17 | 49.13 | 62.03 | ||||||||||||
| 1978 | 42.98 | 45.52 | 53.02 | 54.15 | 64.79 | 79.67 | 84.19 | 82.45 | 74.00 | 68.92 | 48.50 | 37.48 | 61.31 | |||||||||||||
| 1979 | 35.37 | 42.20 | a | 47.97 | 57.28 | 66.29 | 77.75 | 83.73 | 79.16 | 79.83 | 66.90 | 49.20 | 47.23 | 61.08 | ||||||||||||
| 1980 | 46.06 | 49.50 | 48.15 | 57.45 | 62.05 | 76.03 | 84.11 | 82.13 | 75.37 | 64.95 | 54.40 | 50.73 | 62.58 | |||||||||||||
| 1981 | 48.29 | 48.21 | 49.81 | 62.08 | 68.06 | 82.68 | 85.39 | 82.84 | 76.17 | c | 60.18 | c | 55.07 | 48.69 | 63.96 | |||||||||||
| 1982 | 42.63 | 47.75 | 49.73 | 57.08 | 66.98 | 74.65 | 80.81 | 80.37 | 72.55 | 60.15 | 49.03 | 41.76 | 60.29 | |||||||||||||
| 1983 | 44.71 | 46.68 | 49.90 | 51.83 | 65.50 | 75.07 | 81.94 | 77.52 | 76.27 | 63.24 | 50.92 | 45.52 | 60.76 | |||||||||||||
| 1984 | 44.73 | 46.62 | 52.53 | 57.32 | 74.44 | 76.27 | 80.73 | 78.58 | 76.22 | 58.03 | 49.23 | 41.32 | 61.33 | |||||||||||||
| 1985 | 39.87 | 44.11 | 50.47 | 61.80 | 68.52 | 79.17 | 83.83 | a | 81.29 | 69.43 | 62.42 | 48.02 | 45.31 | 61.19 | ||||||||||||
| 1986 | 50.08 | 49.29 | 55.68 | 58.77 | 68.63 | 79.73 | 80.23 | 83.08 | 69.15 | 60.87 | 52.02 | 43.84 | 62.61 | |||||||||||||
| 1987 | 40.85 | 45.82 | 48.32 | 62.42 | 66.94 | 78.78 | 79.69 | 80.18 | 74.95 | 67.58 | 50.50 | 39.40 | 61.29 | |||||||||||||
| 1988 | 41.77 | 48.67 | 51.45 | 57.15 | 66.52 | 77.92 | 84.77 | 79.22 | a | 72.57 | 69.65 | 52.12 | 42.13 | 61.99 | ||||||||||||
| 1989 | 40.81 | 46.16 | 56.47 | 66.85 | 68.94 | 77.48 | 84.52 | 80.53 | 75.17 | 63.00 | 53.88 | 44.71 | 63.21 | |||||||||||||
| 1990 | 42.32 | 42.38 | 53.60 | 60.20 | 65.87 | 78.70 | 81.19 | 78.52 | 74.55 | 65.69 | 51.90 | ----- | z | 63.17 | ||||||||||||
| 1991 | 41.79 | 52.66 | 44.45 | 56.60 | 63.73 | 72.38 | 82.15 | 80.45 | 75.42 | 66.89 | 51.63 | 43.74 | 60.99 | |||||||||||||
| 1992 | 42.69 | 48.74 | 50.39 | 61.40 | 68.37 | 75.20 | 81.31 | 81.52 | 76.83 | 66.90 | 48.42 | 40.97 | 61.89 | |||||||||||||
| 1993 | 43.56 | 45.54 | 53.98 | 60.17 | 69.63 | 75.72 | 79.52 | 80.37 | 75.65 | j | ----- | z | ----- | z | ----- | z | 63.56 | |||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.75 | 47.03 | 50.53 | 57.78 | 66.97 | 77.19 | 82.60 | 80.57 | 74.46 | 63.55 | 51.22 | 43.29 | 61.47 | |||||||||||||
| S.D. | 2.94 | 2.81 | 3.74 | 3.76 | 3.04 | 2.22 | 1.73 | 1.66 | 2.32 | 3.42 | 2.48 | 3.45 | 1.00 | |||||||||||||
| SKEW | 0.25 | 0.01 | 0.36 | -0.02 | -0.28 | 0.19 | 0.05 | 0.13 | -0.43 | 0.14 | 0.29 | 0.37 | 0.23 | |||||||||||||
| MAX | 50.08 | 52.66 | 59.58 | 66.85 | 74.44 | 82.68 | 85.48 | 84.02 | 79.83 | 69.65 | 56.97 | 50.73 | 63.96 | |||||||||||||
| MIN | 35.37 | 42.20 | 44.45 | 49.23 | 60.03 | 72.38 | 79.52 | 77.52 | 69.15 | 58.03 | 46.40 | 37.48 | 59.32 | |||||||||||||
| NO YRS | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 24 | |||||||||||||