| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.80 | 31.73 | a | 37.27 | j | |
| 1972 | 33.71 | 42.76 | 53.19 | 54.77 | 69.16 | 77.23 | 85.94 | 84.35 | 70.50 | 59.63 | a | 41.93 | 33.00 | 58.85 | ||||||||||||
| 1973 | 34.71 | 40.82 | 41.70 | a | 52.62 | a | ----- | z | 76.93 | 83.67 | a | 84.06 | 72.77 | 62.26 | 43.07 | 38.90 | 57.41 | a | ||||||||
| 1974 | 33.87 | 38.54 | 47.93 | a | 54.57 | 66.94 | 83.83 | 86.23 | 84.13 | 78.13 | 62.23 | 48.13 | 36.39 | 60.08 | ||||||||||||
| 1975 | 35.70 | a | 37.32 | 41.65 | 45.37 | 60.52 | 71.17 | 86.58 | 81.42 | 76.67 | 57.39 | 45.17 | 43.84 | 56.90 | ||||||||||||
| 1976 | 41.19 | 42.69 | 45.00 | c | 54.57 | b | 69.97 | b | 75.68 | b | 88.00 | h | 79.13 | 70.86 | h | 62.79 | b | 55.62 | a | 46.08 | e | 57.27 | b | |||
| 1977 | 40.64 | c | 42.00 | j | 43.15 | k | 62.30 | g | 56.00 | b | 79.79 | b | 85.50 | a | 83.60 | a | 73.83 | a | 66.00 | b | 48.46 | b | 40.92 | f | 66.73 | d |
| 1978 | 40.58 | l | 41.23 | b | 52.62 | e | 54.04 | c | 61.93 | a | 77.10 | a | 87.43 | c | 83.72 | f | 69.58 | d | 69.04 | e | 44.52 | i | 34.14 | i | 64.12 | d |
| 1979 | 31.29 | g | 39.14 | f | 47.11 | l | 55.84 | e | 70.78 | m | 76.13 | g | 85.67 | g | 80.84 | l | 81.22 | c | 64.41 | b | ----- | z | ----- | z | 67.16 | i |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 36.64 | 40.56 | 47.01 | 53.11 | 64.09 | 77.39 | 85.89 | 82.78 | 74.67 | 62.97 | 46.45 | 38.32 | 58.61 | |||||||||||||
| S.D. | 3.39 | 2.21 | 5.13 | 3.55 | 5.50 | 3.86 | 1.27 | 2.09 | 4.21 | 3.62 | 4.79 | 5.77 | 1.60 | |||||||||||||
| SKEW | 0.59 | -0.44 | 0.16 | -1.74 | -0.30 | 0.11 | -0.75 | -1.02 | 0.29 | 0.14 | 0.98 | 0.22 | -0.27 | |||||||||||||
| MAX | 41.19 | 42.76 | 53.19 | 55.84 | 69.97 | 83.83 | 87.43 | 84.35 | 81.22 | 69.04 | 55.62 | 46.08 | 60.08 | |||||||||||||
| MIN | 33.71 | 37.32 | 41.65 | 45.37 | 56.00 | 71.17 | 83.67 | 79.13 | 69.58 | 57.39 | 41.93 | 31.73 | 56.90 | |||||||||||||
| YRS | 6 | 6 | 6 | 7 | 6 | 7 | 6 | 6 | 7 | 8 | 7 | 6 | 3 | |||||||||||||