| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 89.42 | 81.27 | 60.42 | 47.57 | 35.39 | 62.81 | ||||||
| 1952 | 33.84 | 36.24 | 44.35 | 67.60 | 74.65 | 80.67 | 91.68 | 92.26 | 86.00 | 77.06 | 49.43 | 40.87 | 64.55 | |||||||||||||
| 1953 | 45.90 | 46.36 | 56.39 | 60.83 | 66.10 | 77.07 | 96.00 | 89.94 | 84.23 | 69.23 | 54.30 | 37.71 | 65.34 | |||||||||||||
| 1954 | 40.68 | 48.86 | 50.77 | 63.43 | 76.39 | 75.43 | 92.23 | 85.45 | 81.17 | 67.97 | 54.83 | 37.84 | 64.59 | |||||||||||||
| 1955 | 32.06 | 34.79 | 42.90 | 53.40 | 68.94 | 81.33 | 86.84 | 91.84 | 80.13 | 68.71 | 41.90 | 40.58 | 60.29 | |||||||||||||
| 1956 | 38.32 | 35.38 | 52.71 | 66.47 | 73.90 | 79.40 | 90.58 | 86.90 | 81.60 | 62.48 | 46.17 | 38.94 | 62.74 | |||||||||||||
| 1957 | 27.81 | 39.50 | 50.71 | 60.90 | 71.52 | 80.23 | 91.06 | 87.71 | 83.97 | 61.61 | 46.59 | a | 39.71 | 61.78 | ||||||||||||
| 1958 | 35.48 | 46.93 | 52.48 | 59.30 | 80.39 | 80.53 | 89.94 | 93.35 | 78.87 | 70.90 | 49.67 | 43.58 | 65.12 | |||||||||||||
| 1959 | 39.48 | 44.50 | 52.55 | 66.00 | 67.33 | a | 82.30 | 91.06 | 83.87 | 72.53 | 67.06 | 52.27 | 42.26 | 63.44 | ||||||||||||
| 1960 | 33.52 | 39.34 | 52.87 | 63.37 | 69.13 | a | 84.73 | 94.94 | 85.10 | 84.80 | 66.48 | 50.40 | 40.45 | 63.76 | ||||||||||||
| 1961 | 42.45 | 49.32 | 54.06 | 61.93 | 74.03 | 89.73 | 94.45 | 94.84 | 75.43 | 63.16 | 47.40 | 37.61 | 65.37 | |||||||||||||
| 1962 | 31.29 | 37.93 | 49.10 | 69.83 | 68.81 | 81.20 | 88.74 | 88.85 | d | 83.90 | 66.90 | 54.33 | 43.26 | 63.68 | ||||||||||||
| 1963 | 35.06 | 52.96 | 54.97 | 58.27 | 71.74 | 76.90 | 87.48 | 88.19 | 86.37 | ----- | z | ----- | z | 36.35 | 64.83 | |||||||||||
| 1964 | 31.03 | ----- | z | ----- | z | ----- | z | ----- | z | 78.65 | j | 92.26 | 87.58 | 76.50 | 70.13 | 46.00 | 38.81 | 63.19 | ||||||||
| 1965 | 37.42 | 46.79 | 54.32 | 63.90 | 70.94 | 79.97 | 89.87 | 85.23 | 72.57 | 73.26 | 52.40 | 38.97 | 63.80 | |||||||||||||
| 1966 | 39.52 | 42.54 | 55.29 | 66.63 | 78.81 | 80.23 | 92.06 | 91.97 | 85.87 | 66.16 | 50.67 | 38.94 | 65.72 | |||||||||||||
| 1967 | 39.48 | 47.93 | 52.48 | 55.53 | 73.42 | 79.77 | 94.19 | 97.13 | 88.20 | 63.61 | 50.50 | 34.87 | 64.76 | |||||||||||||
| 1968 | 35.90 | 49.24 | 59.35 | 61.67 | 72.87 | 82.57 | 94.26 | 82.68 | 77.03 | 63.06 | 45.97 | 38.19 | 63.57 | |||||||||||||
| 1969 | 36.77 | 39.46 | 51.97 | 66.63 | 78.32 | 80.93 | 90.77 | 92.61 | 82.60 | 60.13 | 50.03 | 39.29 | 64.13 | |||||||||||||
| 1970 | 38.65 | 50.18 | 52.58 | 56.27 | 73.65 | 83.70 | 91.55 | 94.35 | 74.97 | 60.16 | 47.70 | 36.53 | a | 63.36 | ||||||||||||
| 1971 | 35.97 | 44.64 | 47.97 | 63.00 | 75.39 | 77.77 | 90.65 | 94.45 | 74.97 | 63.61 | 45.43 | 33.68 | 62.29 | |||||||||||||
| 1972 | 34.55 | 41.31 | 56.87 | 60.30 | 77.00 | 81.70 | 89.42 | 92.10 | 74.97 | 66.65 | 47.53 | 29.65 | 62.67 | |||||||||||||
| 1973 | 34.55 | 46.63 | a | 53.81 | 63.23 | 77.35 | 82.70 | 93.35 | 91.23 | 79.73 | 64.61 | 44.63 | 39.45 | 64.27 | ||||||||||||
| 1974 | 33.16 | 44.89 | 51.81 | 62.73 | 70.77 | 88.17 | 89.68 | 89.77 | 83.97 | 67.74 | 49.53 | 36.65 | 64.07 | |||||||||||||
| 1975 | 32.84 | 40.61 | 48.81 | 54.07 | 70.23 | 78.40 | 92.68 | 84.10 | 82.43 | 62.45 | 46.73 | 36.42 | 60.81 | |||||||||||||
| 1976 | 36.23 | 39.66 | 46.71 | 61.70 | 77.29 | 78.00 | 90.61 | 82.68 | 79.33 | 66.61 | 54.67 | 41.00 | 62.87 | |||||||||||||
| 1977 | 28.03 | 45.89 | 50.67 | a | 71.13 | 66.16 | 87.00 | 91.00 | 90.55 | 77.60 | 66.16 | 46.77 | 40.19 | 63.43 | ||||||||||||
| 1978 | 40.74 | 43.71 | 59.94 | 60.03 | 69.10 | 80.97 | 88.84 | 87.35 | 75.07 | 69.97 | 46.27 | 32.00 | 62.83 | |||||||||||||
| 1979 | 24.16 | 39.11 | 54.68 | 61.43 | 73.68 | 84.07 | 92.13 | 88.71 | 85.93 | 68.57 | a | 43.93 | 40.06 | 63.04 | ||||||||||||
| 1980 | 35.00 | 45.79 | 52.10 | 66.83 | 71.10 | 78.27 | 88.48 | 84.97 | a | 77.17 | 65.42 | 46.83 | 40.10 | 62.67 | ||||||||||||
| 1981 | 38.61 | 45.18 | 57.48 | 63.47 | 69.77 | 78.07 | 90.16 | 94.00 | 81.53 | 61.65 | 51.60 | 39.29 | 64.23 | |||||||||||||
| 1982 | 31.94 | 34.21 | 51.10 | 59.03 | 71.45 | 80.53 | 85.77 | 89.39 | 76.07 | 61.77 | 42.43 | 35.68 | 59.95 | |||||||||||||
| 1983 | 38.65 | 47.96 | 55.13 | 60.77 | 72.32 | 79.50 | 86.71 | 89.61 | 78.53 | 66.81 | 48.40 | 30.29 | 62.89 | |||||||||||||
| 1984 | 30.81 | 34.90 | ----- | z | 59.33 | 70.74 | 76.97 | 91.23 | 89.81 | 74.93 | 58.42 | 44.80 | 28.48 | 60.04 | ||||||||||||
| 1985 | 25.39 | 32.11 | 45.29 | 67.33 | 73.13 | 82.67 | 93.35 | 84.97 | 68.43 | 60.03 | 34.03 | 19.71 | 57.20 | |||||||||||||
| 1986 | 32.45 | 43.39 | 58.35 | 59.70 | 71.29 | 87.13 | 84.10 | 92.26 | 68.43 | 64.61 | 46.80 | 34.48 | 61.92 | |||||||||||||
| 1987 | 32.42 | 44.14 | 53.65 | 71.17 | 75.32 | 82.73 | 86.42 | 87.84 | 83.10 | 71.48 | 48.47 | 37.42 | 64.51 | |||||||||||||
| 1988 | 29.58 | 43.34 | 54.03 | 65.13 | 71.16 | 84.67 | 92.65 | 90.39 | 78.33 | 73.94 | 43.93 | ----- | z | 66.10 | ||||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 34.86 | 42.94 | 52.52 | 62.57 | 72.62 | 81.28 | 90.73 | 89.30 | 79.44 | 65.92 | 47.86 | 37.15 | 63.20 | |||||||||||||
| S.D. | 4.69 | 5.16 | 3.97 | 4.37 | 3.52 | 3.33 | 2.70 | 3.64 | 4.94 | 4.30 | 4.08 | 4.59 | 1.76 | |||||||||||||
| SKEW | -0.12 | -0.30 | -0.46 | -0.01 | 0.23 | 0.65 | -0.41 | -0.02 | -0.32 | 0.45 | -0.72 | -1.74 | -1.40 | |||||||||||||
| MAX | 45.90 | 52.96 | 59.94 | 71.17 | 80.39 | 89.73 | 96.00 | 97.13 | 88.20 | 77.06 | 54.83 | 43.58 | 65.72 | |||||||||||||
| MIN | 24.16 | 32.11 | 42.90 | 53.40 | 66.10 | 75.43 | 84.10 | 82.68 | 68.43 | 58.42 | 34.03 | 19.71 | 57.20 | |||||||||||||
| NO YRS | 37 | 36 | 35 | 36 | 36 | 36 | 37 | 38 | 38 | 37 | 37 | 37 | 33 | |||||||||||||