| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.77 | 29.00 | c | 34.88 | j | |
| 1969 | 32.60 | a | 28.94 | a | 35.65 | 47.31 | a | 58.89 | 60.93 | a | 73.69 | 74.14 | c | 66.30 | 45.55 | 38.88 | 32.61 | 49.62 | ||||||||
| 1970 | 34.55 | 41.30 | 38.44 | 41.33 | 55.34 | 63.68 | 74.24 | 75.22 | a | 58.50 | b | 46.80 | a | 42.07 | b | 28.47 | 50.00 | |||||||||
| 1971 | 34.69 | 35.11 | 39.34 | 46.08 | 51.98 | 64.00 | 74.65 | 75.15 | 57.15 | 45.31 | 37.25 | 23.95 | b | 48.72 | ||||||||||||
| 1972 | 27.09 | b | 37.45 | 46.62 | a | 46.27 | 59.13 | a | 69.12 | 76.06 | 72.02 | 60.30 | 48.82 | 36.53 | a | 22.62 | a | 50.17 | ||||||||
| 1973 | 27.37 | 34.55 | 37.87 | 44.58 | 60.13 | 67.13 | 74.90 | 71.72 | a | 61.27 | 49.06 | 36.73 | b | 33.76 | b | 49.92 | ||||||||||
| 1974 | 32.60 | 37.44 | b | 43.45 | c | 46.85 | 59.10 | a | 72.47 | 74.29 | 72.47 | 65.28 | a | 51.43 | a | 40.32 | 29.48 | a | 52.10 | |||||||
| 1975 | 29.13 | a | 34.50 | f | 37.47 | a | 38.84 | a | 54.61 | 64.54 | c | 77.56 | 69.50 | 64.67 | 48.45 | 37.09 | g | 33.52 | 51.83 | b | ||||||
| 1976 | 31.90 | 37.72 | d | 35.59 | t | 44.03 | 58.87 | 62.62 | 75.42 | 64.35 | e | 61.52 | b | 48.69 | 40.53 | 28.06 | 50.34 | a | ||||||||
| 1977 | 26.02 | 38.36 | 37.24 | 52.30 | 51.15 | a | 71.88 | 75.98 | 73.57 | a | 64.87 | 54.84 | 42.07 | 39.08 | 52.28 | |||||||||||
| 1978 | 34.27 | 34.94 | a | 46.68 | 46.75 | 53.68 | 64.63 | 74.63 | 72.15 | 59.63 | 54.87 | 36.58 | 24.73 | 50.30 | ||||||||||||
| 1979 | 23.48 | a | ----- | z | 42.39 | 47.27 | 58.66 | 67.43 | 75.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.52 | f | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.34 | 36.20 | 40.51 | 45.60 | 56.50 | 66.22 | 75.21 | 72.03 | 61.95 | 49.38 | 39.17 | 29.57 | 50.39 | |||||||||||||
| S.D. | 3.89 | 3.43 | 4.00 | 3.49 | 3.24 | 3.73 | 1.11 | 3.20 | 3.15 | 3.40 | 2.26 | 4.90 | 1.21 | |||||||||||||
| SKEW | -0.39 | -0.79 | 0.52 | -0.19 | -0.48 | 0.44 | 0.68 | -1.40 | -0.02 | 0.58 | -0.01 | 0.35 | 0.56 | |||||||||||||
| MAX | 34.69 | 41.30 | 46.68 | 52.30 | 60.13 | 72.47 | 77.56 | 75.22 | 66.30 | 54.87 | 42.07 | 39.08 | 52.28 | |||||||||||||
| MIN | 23.48 | 28.94 | 35.65 | 38.84 | 51.15 | 60.93 | 73.69 | 64.35 | 57.15 | 45.31 | 36.53 | 22.62 | 48.72 | |||||||||||||
| YRS | 11 | 9 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 8 | |||||||||||||