| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.10 | 19.10 | ||
| 1955 | 13.45 | 11.39 | 14.13 | 21.50 | 33.48 | 43.97 | 51.13 | 59.32 | 44.73 | 35.68 | 17.40 | 17.68 | c | 30.32 | ||||||||||||
| 1956 | 15.68 | 11.45 | 20.16 | 29.77 | 39.61 | 42.93 | 56.10 | 51.55 | 47.40 | e | 31.48 | 25.93 | ----- | z | 33.82 | |||||||||||
| 1957 | 9.39 | 22.07 | 20.68 | 27.20 | 37.55 | 44.10 | a | 54.50 | a | 53.81 | 48.17 | 32.81 | 20.03 | 19.68 | c | 32.50 | ||||||||||
| 1958 | 19.93 | b | 23.19 | b | 18.83 | a | 24.93 | 45.10 | 45.57 | 53.23 | 57.58 | 42.13 | 39.47 | a | 23.93 | a | 24.90 | 34.90 | ||||||||
| 1959 | 17.94 | 17.71 | 19.19 | 30.53 | 30.90 | 48.73 | 57.94 | 52.81 | 39.67 | 34.74 | 25.83 | 22.16 | 33.18 | |||||||||||||
| 1960 | 13.74 | 12.93 | a | 25.10 | 28.17 | 33.52 | 47.90 | 62.06 | 49.71 | 50.13 | 35.61 | 23.40 | 21.32 | 33.63 | ||||||||||||
| 1961 | 23.84 | 20.82 | 22.06 | 26.73 | 35.77 | 53.23 | 57.68 | 59.10 | 37.67 | 32.61 | 21.93 | 15.23 | 33.89 | |||||||||||||
| 1962 | 13.94 | 18.75 | 17.87 | 32.20 | 33.13 | 44.83 | 52.65 | 50.77 | 47.60 | 38.26 | 26.33 | 24.35 | 33.39 | |||||||||||||
| 1963 | 10.94 | 25.68 | 19.14 | b | 22.50 | d | 38.84 | 38.61 | b | 51.77 | 56.48 | 49.63 | 39.48 | 25.30 | 20.55 | 33.24 | ||||||||||
| 1964 | 13.45 | 14.55 | ----- | z | 24.20 | 33.00 | 41.00 | 54.19 | 48.42 | 42.73 | 38.16 | 21.97 | 11.91 | h | 33.17 | |||||||||||
| 1965 | 18.76 | b | 17.00 | 15.73 | a | 28.77 | ----- | z | 42.64 | b | 53.18 | c | 49.67 | a | ----- | z | 42.23 | a | 30.81 | c | 20.53 | a | 31.93 | |||
| 1966 | 15.19 | e | 14.89 | a | 22.00 | d | ----- | z | 41.26 | 43.47 | 55.68 | 53.58 | 49.33 | 34.76 | b | 27.70 | 18.64 | f | 35.79 | |||||||
| 1967 | 15.84 | f | 18.56 | a | ----- | z | 20.77 | d | 38.25 | c | 44.81 | d | 57.68 | 60.52 | 51.34 | a | 32.57 | a | ----- | z | 14.50 | c | 37.67 | |||
| 1968 | 15.32 | f | 29.44 | k | 25.74 | 23.00 | 34.00 | ----- | z | 57.47 | a | ----- | z | 42.47 | 32.86 | c | 22.07 | 12.00 | k | 33.94 | ||||||
| 1969 | 7.89 | m | 12.04 | 15.71 | g | 27.03 | 40.42 | 44.70 | 55.39 | 56.10 | a | 47.70 | 27.74 | d | 30.55 | h | 21.39 | 36.94 | ||||||||
| 1970 | 16.55 | 23.15 | b | 17.10 | 18.93 | 35.29 | 47.90 | 55.45 | 58.00 | 36.93 | b | 32.44 | d | 22.17 | a | ----- | z | 33.08 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 15.60 | 17.61 | 19.83 | 25.75 | 36.67 | 44.96 | 55.38 | 54.49 | 45.18 | 35.06 | 23.92 | 20.12 | 33.13 | |||||||||||||
| S.D. | 3.86 | 4.68 | 3.36 | 3.88 | 3.89 | 3.48 | 2.79 | 3.95 | 4.66 | 3.71 | 3.39 | 3.18 | 1.33 | |||||||||||||
| SKEW | 0.47 | 0.14 | 0.21 | -0.11 | 0.52 | 0.57 | 0.58 | -0.02 | -0.46 | 0.13 | 0.11 | -0.33 | -1.08 | |||||||||||||
| MAX | 23.84 | 25.68 | 25.74 | 32.20 | 45.10 | 53.23 | 62.06 | 60.52 | 51.34 | 42.23 | 30.81 | 24.90 | 34.90 | |||||||||||||
| MIN | 9.39 | 11.39 | 14.13 | 18.93 | 30.90 | 38.61 | 51.13 | 48.42 | 36.93 | 27.74 | 17.40 | 14.50 | 30.32 | |||||||||||||
| NO YRS | 13 | 15 | 13 | 15 | 15 | 15 | 16 | 15 | 15 | 16 | 14 | 12 | 8 | |||||||||||||