| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.38 | 27.90 | 34.14 | |||
| 1964 | 28.31 | 32.66 | d | 39.50 | 47.78 | 55.94 | 63.20 | 74.13 | 70.44 | 60.78 | 51.76 | 37.57 | 34.05 | 49.68 | ||||||||||||
| 1965 | 31.89 | 38.38 | 40.35 | 51.53 | 56.44 | 66.23 | 73.16 | 70.60 | 58.95 | 53.82 | 42.05 | 27.82 | 50.94 | |||||||||||||
| 1966 | 33.45 | 34.98 | 42.65 | 50.78 | 61.61 | 64.40 | 73.81 | 73.73 | 67.40 | 50.00 | 42.70 | 32.71 | 52.35 | |||||||||||||
| 1967 | 35.73 | 39.59 | 41.13 | 43.23 | 57.76 | 65.67 | 76.98 | 78.30 | h | 68.10 | 50.32 | 40.70 | 28.98 | 49.84 | ||||||||||||
| 1968 | 29.90 | 40.09 | 44.68 | 47.09 | b | 58.53 | 67.88 | 76.85 | 69.23 | a | 62.92 | 48.48 | 39.42 | 32.02 | 51.42 | |||||||||||
| 1969 | 29.27 | 30.79 | 40.79 | 49.88 | 62.39 | 67.18 | 74.15 | 73.31 | 64.80 | 47.11 | 38.48 | 33.42 | 50.96 | |||||||||||||
| 1970 | 34.85 | 39.35 | d | 41.92 | 44.13 | 57.82 | 69.10 | 75.76 | 75.06 | 58.56 | f | 47.44 | 40.82 | 29.76 | 50.55 | |||||||||||
| 1971 | 34.34 | 37.05 | 38.37 | 48.37 | 58.95 | 63.82 | 74.47 | 77.94 | 58.43 | 48.85 | 37.22 | 29.65 | 50.62 | |||||||||||||
| 1972 | 30.10 | 34.52 | 45.29 | 47.25 | 60.55 | 68.88 | 73.90 | 76.40 | e | 59.45 | 51.94 | 39.37 | 23.10 | 50.90 | ||||||||||||
| 1973 | 27.85 | 36.88 | 42.39 | 49.79 | d | 61.02 | 67.95 | 76.21 | 74.32 | f | 62.78 | 51.36 | b | 39.25 | 35.87 | 50.12 | ||||||||||
| 1974 | 30.13 | 36.89 | 42.61 | 48.22 | 56.97 | 72.07 | 73.88 | b | 72.72 | d | 65.47 | 50.79 | 39.93 | 31.05 | 51.73 | |||||||||||
| 1975 | 29.23 | 34.46 | 40.02 | 43.52 | 56.71 | 64.92 | 77.82 | 69.76 | 64.17 | 50.61 | 37.47 | 32.31 | 50.08 | |||||||||||||
| 1976 | 32.21 | 33.86 | 38.00 | 47.87 | 60.73 | 63.55 | 75.05 | 67.94 | 64.38 | 49.92 | 40.83 | 29.58 | 50.33 | |||||||||||||
| 1977 | 22.76 | 35.98 | 40.95 | 54.87 | 53.48 | 72.45 | 74.74 | 74.24 | 62.45 | 52.06 | 39.25 | 37.69 | 51.74 | |||||||||||||
| 1978 | 34.39 | 38.91 | 47.02 | 48.55 | 55.76 | 66.04 | c | 74.02 | 71.55 | 61.15 | 52.11 | 35.33 | 26.06 | 50.91 | ||||||||||||
| 1979 | 15.58 | 33.98 | 43.56 | 49.42 | 59.55 | 67.83 | 76.00 | 73.27 | a | 66.95 | 55.11 | 35.43 | 32.76 | 50.79 | ||||||||||||
| 1980 | 29.95 | 38.19 | 42.16 | 52.27 | 58.31 | 62.53 | 75.08 | 70.39 | 64.40 | 51.10 | 38.78 | 32.55 | 51.31 | |||||||||||||
| 1981 | 33.02 | 35.41 | 43.87 | 50.73 | 56.50 | 64.58 | 72.29 | 77.24 | 64.07 | 49.06 | 42.05 | 34.52 | f | 53.53 | ||||||||||||
| 1982 | 27.23 | 32.80 | 41.42 | 46.32 | 56.65 | 66.58 | 70.66 | 73.53 | 60.38 | 50.18 | 33.88 | 29.13 | 49.06 | |||||||||||||
| 1983 | 34.16 | 38.57 | 44.00 | 46.32 | 58.40 | 63.93 | 70.03 | 74.61 | 59.83 | 51.98 | 40.80 | 26.68 | 50.78 | |||||||||||||
| 1984 | 25.10 | ----- | z | ----- | z | 47.28 | 55.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.66 | ||||
| 1985 | 27.14 | q | 28.71 | 38.15 | a | 52.13 | 58.24 | 67.22 | 77.29 | 67.50 | i | 56.50 | a | 52.18 | 30.10 | 16.73 | 47.72 | |||||||||
| 1986 | 24.94 | 38.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.56 | |||
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.76 | 31.76 | ||
| 1988 | 27.83 | b | 37.34 | 45.18 | 53.55 | 59.17 | k | 67.09 | b | 81.00 | q | 73.06 | ----- | z | ----- | z | ----- | z | ----- | z | 50.68 | |||||
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.81 | 63.12 | m | 51.63 | 39.42 | 30.95 | 48.20 | |||||
| 1990 | 32.12 | o | ----- | z | 44.77 | 56.45 | 56.55 | 66.98 | 77.71 | 74.03 | 68.79 | k | 50.37 | 42.96 | f | 19.55 | 55.80 | |||||||||
| 1991 | 26.08 | 40.79 | 51.00 | z | 49.03 | m | 54.69 | 62.20 | ----- | z | ----- | z | ----- | z | 44.39 | m | 37.32 | 30.85 | 41.99 | |||||||
| 1992 | 31.48 | 40.16 | 47.18 | 54.55 | 64.48 | 70.96 | g | 76.10 | 73.95 | 63.42 | 54.37 | 34.47 | ----- | z | 54.02 | |||||||||||
| 1993 | ----- | z | ----- | z | ----- | z | 48.35 | 62.68 | 61.67 | 65.63 | 68.45 | 62.55 | 52.66 | 34.03 | 37.83 | y | 57.00 | |||||||||
| 1994 | ----- | z | ----- | z | ----- | z | 55.72 | 61.27 | 67.92 | 78.05 | 75.52 | 68.78 | 50.42 | 31.48 | 28.94 | 57.57 | ||||||||||
| 1995 | 33.18 | 42.62 | 44.23 | 46.92 | ----- | z | ----- | z | ----- | z | 70.05 | u | 65.58 | 48.66 | 43.92 | 32.77 | 44.74 | |||||||||
| 1996 | 31.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.95 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 29.81 | 36.58 | 42.41 | 49.39 | 58.43 | 66.23 | 74.55 | 72.82 | 63.07 | 50.90 | 38.30 | 29.80 | 50.85 | |||||||||||||
| S.D. | 4.40 | 3.27 | 2.58 | 3.53 | 2.68 | 2.75 | 2.78 | 2.70 | 3.19 | 1.94 | 3.35 | 4.54 | 0.81 | |||||||||||||
| SKEW | -1.28 | -0.46 | 0.02 | 0.29 | 0.39 | 0.41 | -1.41 | -0.03 | -0.10 | 0.09 | -0.70 | -1.14 | -0.26 | |||||||||||||
| MAX | 35.73 | 42.62 | 47.18 | 56.45 | 64.48 | 72.45 | 78.05 | 77.94 | 68.78 | 55.11 | 43.92 | 37.69 | 52.35 | |||||||||||||
| MIN | 15.58 | 28.71 | 38.00 | 43.23 | 53.48 | 61.67 | 65.63 | 67.94 | 56.50 | 47.11 | 30.10 | 16.73 | 49.06 | |||||||||||||
| NO YRS | 27 | 26 | 25 | 28 | 27 | 26 | 25 | 24 | 24 | 27 | 28 | 27 | 16 | |||||||||||||