| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1949 | 7.52 | 12.50 | 20.84 | 28.41 | c | 30.90 | a | 38.77 | 41.61 | 39.87 | 38.10 | a | 29.90 | 27.07 | 17.39 | 27.74 | ||||||||||
| 1950 | 12.90 | 18.14 | 19.61 | 24.90 | 28.23 | 34.27 | 43.90 | 41.03 | 37.77 | 32.52 | 29.67 | 26.13 | 29.09 | |||||||||||||
| 1951 | 16.84 | 18.64 | 19.65 | 27.80 | 30.10 | a | 39.34 | a | 42.58 | 41.31 | b | 39.93 | 29.32 | 24.47 | 16.26 | 28.85 | ||||||||||
| 1952 | 12.84 | 17.38 | 15.81 | 27.47 | 30.23 | 32.28 | e | ----- | z | ----- | z | ----- | z | 33.63 | a | 19.40 | 19.71 | 23.19 | c | |||||||
| 1953 | 21.90 | b | 17.71 | 19.45 | 22.33 | 25.68 | 31.71 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.13 | f | ||||
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1959 | 19.03 | 16.79 | 22.71 | 26.53 | 28.52 | 38.20 | 45.74 | 41.52 | 36.97 | 33.48 | 25.83 | a | 20.10 | 29.62 | ||||||||||||
| 1960 | 17.06 | 15.54 | a | 22.35 | 24.27 | 28.39 | 40.27 | 45.45 | 40.50 | c | 39.30 | 31.87 | 22.47 | 17.52 | 28.75 | |||||||||||
| 1961 | 19.16 | 20.14 | 19.23 | 24.17 | 28.71 | 41.13 | 43.32 | 44.77 | a | 36.03 | 31.10 | 22.97 | 16.13 | 28.90 | ||||||||||||
| 1962 | 15.77 | 17.75 | 13.90 | 26.63 | 28.77 | 36.40 | 41.87 | 41.97 | 40.50 | 33.19 | 27.67 | 23.65 | 29.01 | |||||||||||||
| 1963 | 17.48 | 27.39 | 19.55 | 19.63 | 31.26 | 35.97 | 39.90 | 39.13 | 40.87 | 33.87 | a | 23.13 | 20.84 | 29.09 | ||||||||||||
| 1964 | 15.73 | a | 14.82 | a | 16.07 | a | 22.47 | 27.62 | b | 36.33 | 43.39 | 42.45 | 34.47 | 34.87 | 19.93 | c | ----- | z | 28.01 | a | ||||||
| 1965 | 19.84 | 18.25 | 21.26 | 27.83 | 28.77 | 36.50 | 43.13 | 43.10 | 34.90 | 33.45 | 24.67 | 14.03 | 28.81 | |||||||||||||
| 1966 | 13.07 | a | 10.25 | 19.10 | 28.55 | a | 36.27 | a | 39.30 | 42.94 | 45.52 | 40.47 | 33.03 | 26.69 | a | 19.10 | b | 29.52 | ||||||||
| 1967 | 19.26 | 17.71 | 20.31 | b | 14.77 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.01 | h | ||
| 1968 | 14.92 | g | 22.48 | h | 21.13 | 25.33 | 30.13 | 40.87 | 47.00 | 41.90 | 40.43 | 31.68 | 26.00 | 13.83 | a | 31.83 | b | |||||||||
| 1969 | 19.81 | 14.71 | 18.74 | 24.97 | 32.32 | 36.23 | 44.74 | 42.87 | 40.97 | 29.29 | 25.27 | 22.23 | 29.35 | |||||||||||||
| 1970 | 20.73 | a | 21.25 | 22.58 | 21.60 | 32.81 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.79 | g | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 16.81 | 17.44 | 19.55 | 24.57 | 29.92 | 37.17 | 43.51 | 41.99 | 38.52 | 32.23 | 24.66 | 18.99 | 28.97 | |||||||||||||
| S.D. | 3.74 | 3.81 | 2.42 | 3.61 | 2.47 | 2.90 | 1.90 | 1.80 | 2.32 | 1.77 | 2.88 | 3.65 | 0.50 | |||||||||||||
| SKEW | -0.91 | 0.66 | -0.82 | -1.21 | 0.88 | -0.42 | 0.05 | 0.44 | -0.56 | -0.48 | -0.30 | 0.35 | -1.19 | |||||||||||||
| MAX | 21.90 | 27.39 | 22.71 | 28.55 | 36.27 | 41.13 | 47.00 | 45.52 | 40.97 | 34.87 | 29.67 | 26.13 | 29.62 | |||||||||||||
| MIN | 7.52 | 10.25 | 13.90 | 14.77 | 25.68 | 31.71 | 39.90 | 39.13 | 34.47 | 29.29 | 19.40 | 13.83 | 27.74 | |||||||||||||
| YRS | 16 | 16 | 17 | 17 | 16 | 15 | 13 | 13 | 13 | 14 | 14 | 13 | 11 | |||||||||||||