| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.22 | b | 54.90 | a | 46.27 | 35.84 | b | 33.56 | 46.76 | g | ||
| 1962 | 35.35 | 31.50 | a | 29.42 | a | 49.42 | 45.39 | 58.47 | a | 64.02 | g | 66.73 | e | 64.94 | e | 50.40 | j | 43.36 | a | 38.80 | c | 46.34 | b | |||
| 1963 | 32.37 | 40.57 | 34.11 | 36.33 | a | 51.21 | 53.15 | 64.63 | 64.23 | c | 57.77 | 50.42 | a | 40.15 | 38.90 | 46.99 | ||||||||||
| 1964 | 32.73 | 31.77 | e | 32.02 | a | 36.53 | 44.71 | 55.88 | 66.42 | 65.23 | 56.77 | 54.57 | b | 36.65 | 36.55 | a | 45.82 | |||||||||
| 1965 | 35.56 | 35.30 | 33.34 | b | 35.78 | a | 46.19 | 52.70 | 64.23 | 64.77 | a | 52.45 | a | 55.37 | 40.76 | a | 32.16 | 45.72 | ||||||||
| 1966 | 28.52 | b | 32.28 | c | 39.77 | 46.72 | a | 52.47 | a | 56.90 | d | 63.41 | b | 64.61 | c | 56.94 | c | 48.67 | b | 38.80 | 37.24 | b | 47.20 | |||
| 1967 | 36.77 | a | 37.44 | a | 33.44 | 27.33 | a | 46.13 | 51.91 | c | 66.97 | 66.23 | a | 54.17 | 51.98 | a | 42.84 | a | 28.15 | a | 45.28 | |||||
| 1968 | 32.05 | a | 37.88 | ----- | z | ----- | z | 48.67 | a | 59.70 | 62.26 | ----- | z | 59.15 | c | 50.84 | 39.62 | 33.79 | b | 47.11 | c | |||||
| 1969 | 36.23 | a | 26.39 | 31.50 | a | 38.78 | a | 51.10 | 54.87 | 61.68 | ----- | z | ----- | z | ----- | z | ----- | z | 33.56 | 41.76 | d | |||||
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.58 | 38.73 | 29.10 | 36.80 | i | |||
| 1972 | 40.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.52 | k | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 34.46 | 34.14 | 33.37 | 38.70 | 48.23 | 55.45 | 64.23 | 65.00 | 57.13 | 50.09 | 39.64 | 34.18 | 46.20 | |||||||||||||
| S.D. | 3.46 | 4.53 | 3.23 | 7.39 | 3.03 | 2.81 | 1.98 | 1.19 | 3.80 | 4.23 | 2.51 | 3.74 | 0.84 | |||||||||||||
| SKEW | 0.02 | -0.24 | 1.03 | 0.10 | 0.23 | 0.21 | 0.15 | 0.09 | 0.95 | -0.48 | 0.03 | -0.26 | 0.25 | |||||||||||||
| MAX | 40.52 | 40.57 | 39.77 | 49.42 | 52.47 | 59.70 | 66.97 | 66.73 | 64.94 | 55.37 | 43.36 | 38.90 | 47.20 | |||||||||||||
| MIN | 28.52 | 26.39 | 29.42 | 27.33 | 44.71 | 51.91 | 61.68 | 63.22 | 52.45 | 42.58 | 35.84 | 28.15 | 45.28 | |||||||||||||
| YRS | 9 | 8 | 7 | 7 | 8 | 8 | 7 | 7 | 8 | 8 | 9 | 10 | 5 | |||||||||||||