| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.63 | 61.55 | 57.27 | 54.87 | 46.06 | 35.18 | 33.92 | 48.78 | ||||||||
| 1981 | 33.47 | 32.50 | 38.37 | 42.63 | 46.76 | 52.32 | 58.81 | 64.26 | 54.65 | 42.34 | 37.30 | ----- | z | 45.76 | ||||||||||||
| 1982 | 23.15 | 24.41 | 34.39 | 37.68 | 46.97 | 57.12 | 60.65 | 62.32 | 52.32 | 42.34 | 29.40 | ----- | z | 42.79 | ||||||||||||
| 1983 | 33.16 | 34.91 | 37.90 | 40.28 | 50.00 | 54.37 | 58.89 | 65.47 | 50.02 | 45.00 | 35.63 | 18.10 | 43.64 | |||||||||||||
| 1984 | 29.10 | 33.17 | 37.74 | 39.87 | 46.61 | 54.70 | 64.03 | 64.50 | 52.10 | 39.48 | 32.08 | 20.35 | 42.81 | |||||||||||||
| 1985 | 19.92 | 23.39 | 31.85 | 43.98 | 50.18 | ----- | z | 68.23 | 59.00 | 48.12 | 42.00 | 20.55 | 20.74 | 38.91 | ||||||||||||
| 1986 | 29.50 | 30.62 | 41.08 | 40.42 | 50.94 | 61.10 | ----- | z | 67.06 | 49.35 | 46.97 | 31.13 | 26.45 | 43.15 | ||||||||||||
| 1987 | 25.08 | 32.96 | 38.13 | 48.90 | 52.53 | 58.95 | 59.95 | 59.74 | 57.28 | 47.90 | 35.58 | 26.66 | 45.31 | |||||||||||||
| 1988 | 24.06 | 33.83 | 35.73 | 45.17 | 49.02 | 56.85 | 62.35 | 62.11 | 55.38 | 52.68 | 32.90 | 26.42 | 44.71 | |||||||||||||
| 1989 | 26.15 | 19.73 | 34.16 | 44.27 | 48.21 | 57.55 | 63.47 | 59.37 | 55.28 | 44.73 | 38.17 | 31.42 | 43.54 | |||||||||||||
| 1990 | 31.48 | 29.30 | 39.15 | 46.30 | 47.21 | 55.13 | 64.24 | 62.79 | 60.48 | 42.90 | 36.52 | 19.37 | 44.57 | |||||||||||||
| 1991 | 26.60 | ----- | z | 35.21 | 42.33 | 47.56 | 52.48 | 62.92 | 65.74 | 56.82 | 45.06 | 33.55 | 31.81 | 45.46 | ||||||||||||
| 1992 | 32.11 | 39.29 | 43.37 | 45.98 | 55.00 | 61.73 | 61.90 | 64.06 | 54.90 | 47.79 | 31.83 | 24.08 | 46.84 | |||||||||||||
| 1993 | 21.29 | 24.25 | 37.98 | 40.33 | 54.10 | ----- | z | 54.24 | 58.37 | 54.62 | 47.92 | 30.27 | 31.68 | 41.37 | ||||||||||||
| 1994 | 36.42 | 31.29 | 40.48 | 46.22 | 52.84 | 56.27 | 66.89 | 64.98 | 59.13 | 44.63 | 28.23 | 26.95 | 46.19 | |||||||||||||
| 1995 | 29.76 | 35.39 | 35.89 | 41.58 | 50.66 | 54.02 | 62.60 | 59.13 | 56.58 | 41.60 | 38.85 | 28.89 | 44.58 | |||||||||||||
| 1996 | 25.76 | 28.21 | ----- | z | 42.65 | 45.16 | 55.63 | 64.16 | 62.44 | ----- | z | ----- | z | ----- | z | ----- | z | 46.29 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 27.94 | 30.22 | 37.43 | 43.04 | 49.61 | 56.06 | 62.18 | 62.27 | 54.49 | 44.96 | 32.95 | 26.20 | 44.69 | |||||||||||||
| S.D. | 4.70 | 5.33 | 2.98 | 2.99 | 2.92 | 2.91 | 3.32 | 2.96 | 3.41 | 3.25 | 4.58 | 5.09 | 1.29 | |||||||||||||
| SKEW | 0.02 | -0.39 | 0.11 | 0.15 | 0.36 | 0.56 | -0.44 | -0.15 | -0.26 | 0.54 | -1.12 | -0.16 | 0.26 | |||||||||||||
| MAX | 36.42 | 39.29 | 43.37 | 48.90 | 55.00 | 61.73 | 68.23 | 67.06 | 60.48 | 52.68 | 38.85 | 33.92 | 46.84 | |||||||||||||
| MIN | 19.92 | 19.73 | 31.85 | 37.68 | 45.16 | 52.32 | 54.24 | 57.27 | 48.12 | 39.48 | 20.55 | 18.10 | 42.81 | |||||||||||||
| NO YRS | 16 | 15 | 15 | 16 | 16 | 15 | 16 | 17 | 16 | 16 | 16 | 14 | 9 | |||||||||||||