| 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 | 30.90 | 20.90 | 25.90 | |||
| 1964 | 20.65 | 21.12 | d | 28.65 | 32.73 | 39.81 | 48.90 | 55.03 | 52.16 | 42.60 | 33.90 | 27.17 | 26.23 | 35.74 | ||||||||||||
| 1965 | 25.65 | 25.75 | 24.74 | 37.77 | 41.29 | 49.97 | 54.52 | 54.35 | 42.37 | 35.00 | 31.00 | 17.58 | 36.66 | |||||||||||||
| 1966 | 24.81 | 24.46 | 28.26 | 33.23 | 44.16 | 49.03 | 55.10 | 54.87 | 50.67 | 32.74 | 32.47 | 26.42 | 38.02 | |||||||||||||
| 1967 | 27.68 | 27.68 | 28.65 | 31.23 | 40.68 | 50.40 | 57.74 | 57.43 | h | 50.30 | 34.16 | 30.20 | 18.97 | 36.15 | ||||||||||||
| 1968 | 21.81 | 29.48 | 29.52 | 31.31 | a | 43.13 | 51.67 | 57.19 | 54.10 | a | 45.73 | 33.26 | 31.60 | 24.58 | 37.78 | |||||||||||
| 1969 | 21.42 | 22.57 | 28.13 | 33.37 | 45.81 | 52.57 | 54.77 | 53.32 | 47.30 | 32.77 | 23.97 | 25.68 | 36.81 | |||||||||||||
| 1970 | 27.68 | 26.71 | d | 30.74 | 30.07 | 41.19 | 53.60 | 57.42 | 55.03 | 40.92 | e | 32.45 | 31.43 | 22.39 | 37.47 | |||||||||||
| 1971 | 26.84 | 25.32 | 26.94 | 33.13 | 43.90 | 48.43 | 55.71 | 58.94 | 41.50 | 33.42 | 25.97 | 22.35 | 36.87 | |||||||||||||
| 1972 | 21.90 | 24.52 | 32.35 | 32.97 | 43.55 | 52.57 | 55.45 | 57.54 | e | 42.93 | 36.94 | 30.27 | 14.58 | 37.13 | ||||||||||||
| 1973 | 21.03 | 27.57 | 30.71 | 34.63 | c | 43.84 | 50.73 | 57.48 | 56.04 | e | 46.73 | 35.66 | b | 31.90 | 29.19 | 38.79 | ||||||||||
| 1974 | 21.81 | 27.21 | 31.23 | 34.47 | 41.48 | 53.57 | 55.90 | b | 53.61 | c | 44.90 | 34.35 | 28.40 | 23.06 | 37.50 | |||||||||||
| 1975 | 20.52 | 25.71 | 29.68 | 32.13 | 41.26 | 49.43 | 60.71 | 51.94 | 44.03 | 37.68 | 26.13 | 24.19 | 36.95 | |||||||||||||
| 1976 | 23.97 | 24.55 | 25.45 | 33.17 | 42.52 | 46.47 | 56.97 | 52.29 | 47.73 | 32.10 | 26.43 | 16.35 | 35.67 | |||||||||||||
| 1977 | 13.94 | 22.61 | 28.29 | 37.13 | 41.71 | 55.63 | 57.52 | 56.87 | 46.53 | 36.00 | 28.80 | 30.84 | 37.99 | |||||||||||||
| 1978 | 27.35 | 31.43 | 33.03 | 36.37 | 40.94 | 48.85 | c | 55.71 | 53.48 | 44.70 | 32.23 | 23.00 | 16.06 | 36.93 | ||||||||||||
| 1979 | 5.58 | 26.00 | 30.42 | 35.70 | 43.35 | 50.13 | 57.52 | 56.90 | a | 48.07 | 40.94 | 24.13 | 24.94 | 36.97 | ||||||||||||
| 1980 | 22.35 | 30.69 | 30.42 | 36.80 | 44.68 | 47.43 | 57.06 | 52.65 | 47.97 | 34.81 | 27.40 | 23.55 | 37.98 | |||||||||||||
| 1981 | 27.90 | 24.71 | 29.52 | 35.83 | 41.10 | 47.70 | 51.61 | 57.77 | 45.97 | 33.74 | 31.37 | 25.76 | f | 38.84 | ||||||||||||
| 1982 | 17.71 | 23.32 | 30.06 | 31.97 | 40.71 | 50.83 | 53.97 | 54.55 | 44.03 | 34.65 | 23.70 | 21.87 | 35.61 | |||||||||||||
| 1983 | 26.23 | 30.50 | 33.55 | 33.53 | 42.42 | 47.60 | 52.19 | 57.10 | 40.90 | 35.45 | 28.97 | 19.29 | 37.31 | |||||||||||||
| 1984 | 16.90 | ----- | z | ----- | z | 32.53 | 39.35 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.60 | ||||
| 1985 | 16.79 | q | 17.64 | 24.60 | a | 33.30 | 38.32 | 45.53 | 55.52 | 47.18 | i | 37.17 | 29.90 | 15.00 | 4.35 | 30.13 | ||||||||||
| 1986 | 13.03 | 27.25 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.14 | |||
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.23 | 22.23 | ||
| 1988 | 18.67 | a | 24.21 | 29.71 | 37.33 | 40.95 | k | 50.39 | b | 61.36 | q | 50.48 | ----- | z | ----- | z | ----- | z | ----- | z | 35.13 | |||||
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.71 | 43.39 | l | 33.74 | 25.37 | 17.23 | 32.51 | |||||
| 1990 | 17.81 | o | ----- | z | 28.71 | 38.63 | 38.87 | 49.10 | 59.00 | 57.19 | 47.85 | j | 33.42 | 28.07 | a | 8.03 | 37.89 | |||||||||
| 1991 | 14.87 | 26.36 | 42.00 | z | 34.35 | m | 39.74 | 46.00 | ----- | z | ----- | z | ----- | z | 30.33 | m | 29.10 | 21.39 | 29.58 | |||||||
| 1992 | 22.90 | 28.97 | 30.74 | 39.63 | 44.90 | 54.42 | f | 55.55 | 53.97 | 43.33 | 36.58 | 25.10 | ----- | z | 38.17 | |||||||||||
| 1993 | ----- | z | ----- | z | ----- | z | 34.00 | 46.68 | 45.07 | 48.10 | 47.77 | 42.13 | 37.32 | 15.97 | 28.33 | y | 39.63 | |||||||||
| 1994 | ----- | z | ----- | z | ----- | z | 36.80 | 46.00 | 48.73 | 59.35 | 54.90 | 47.73 | 32.71 | 19.60 | 19.68 | 40.61 | ||||||||||
| 1995 | 25.81 | 29.71 | 31.90 | 32.13 | ----- | z | ----- | z | ----- | z | 49.40 | u | 46.43 | 29.90 | 32.03 | 25.06 | 31.62 | |||||||||
| 1996 | 23.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.52 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 21.57 | 26.00 | 29.44 | 34.35 | 42.27 | 49.63 | 55.88 | 54.46 | 44.91 | 34.29 | 27.08 | 21.00 | 37.12 | |||||||||||||
| S.D. | 5.31 | 3.17 | 2.32 | 2.45 | 2.25 | 2.61 | 2.62 | 2.53 | 3.19 | 2.37 | 4.55 | 5.82 | 0.86 | |||||||||||||
| SKEW | -1.12 | -0.42 | -0.46 | 0.42 | 0.20 | 0.30 | -0.95 | -0.48 | -0.28 | 0.57 | -1.12 | -1.04 | -0.16 | |||||||||||||
| MAX | 27.90 | 31.43 | 33.55 | 39.63 | 46.68 | 55.63 | 60.71 | 58.94 | 50.67 | 40.94 | 32.47 | 30.84 | 38.79 | |||||||||||||
| MIN | 5.58 | 17.64 | 24.60 | 30.07 | 38.32 | 45.07 | 48.10 | 47.77 | 37.17 | 29.90 | 15.00 | 4.35 | 35.61 | |||||||||||||
| NO YRS | 27 | 26 | 25 | 28 | 27 | 26 | 25 | 25 | 25 | 27 | 29 | 27 | 18 | |||||||||||||