| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1965 | ----- | z | ----- | z | ----- | z | 61.43 | g | 61.42 | g | 71.50 | 81.42 | 77.42 | 70.20 | 69.55 | 49.46 | d | 38.77 | 65.47 | |||||||
| 1966 | 37.58 | 40.21 | 52.52 | 64.27 | 71.90 | 72.40 | 83.10 | 87.48 | 81.35 | g | 64.32 | 47.80 | 40.87 | a | 60.22 | |||||||||||
| 1967 | 41.00 | b | 47.00 | a | 46.45 | b | 45.63 | 64.73 | a | 74.04 | b | 87.61 | 90.21 | c | 81.52 | e | 65.28 | f | 52.25 | b | 33.77 | 60.38 | ||||
| 1968 | ----- | z | 47.93 | a | 55.53 | a | 57.69 | a | 66.67 | a | 78.00 | g | 91.72 | b | ----- | z | 75.88 | d | 62.19 | d | 46.12 | d | 38.71 | g | 62.97 | |
| 1969 | 36.94 | 37.07 | 46.65 | 60.86 | i | 71.81 | e | 71.31 | d | 85.20 | a | 85.48 | j | 77.68 | b | 56.62 | e | 54.07 | c | 43.00 | d | 58.03 | ||||
| 1970 | 39.68 | 49.54 | 49.90 | 52.43 | 68.45 | b | 75.04 | c | 87.29 | 86.45 | 72.00 | 59.48 | b | 47.85 | d | 34.97 | b | 60.26 | ||||||||
| 1971 | 40.13 | a | 44.75 | d | 44.12 | f | 56.15 | d | 63.19 | d | 70.04 | g | 84.22 | h | 87.76 | j | 70.22 | g | 60.86 | i | 49.78 | l | ----- | z | 51.06 | |
| 1972 | 37.42 | g | 44.75 | e | 56.04 | f | 53.68 | h | 69.42 | 78.75 | b | 85.41 | d | 85.32 | i | 69.35 | g | 59.54 | c | 45.54 | f | 31.26 | h | 67.57 | ||
| 1973 | 38.44 | d | 44.50 | d | 45.56 | f | 56.00 | c | 72.20 | f | 77.14 | h | 88.83 | g | 86.13 | h | 75.39 | g | 58.13 | h | 44.75 | j | 43.41 | i | 46.31 | |
| 1974 | 37.80 | k | 42.86 | f | 47.87 | h | 53.71 | m | 65.86 | i | 81.67 | i | 83.77 | a | 84.21 | l | 81.61 | g | 68.05 | j | 52.82 | h | 42.75 | k | 83.77 | |
| 1975 | 40.55 | b | 39.68 | c | 43.72 | f | 46.43 | 66.93 | d | 71.50 | d | 85.76 | f | 79.19 | d | 82.48 | e | 57.20 | f | 44.90 | i | 43.13 | a | 58.74 | ||
| 1976 | 41.62 | b | 43.59 | b | 43.79 | c | 53.78 | c | 70.03 | a | 71.46 | b | 84.41 | d | 73.10 | 76.84 | e | 66.91 | h | 55.68 | k | 47.67 | a | 60.63 | ||
| 1977 | 34.84 | 51.96 | e | 42.70 | d | 63.71 | b | 55.86 | c | 80.67 | c | 85.96 | c | 84.68 | 73.03 | 65.82 | i | 46.24 | e | 41.77 | a | 60.13 | ||||
| 1978 | 41.68 | c | 45.21 | 55.71 | 50.90 | 61.03 | a | 73.31 | a | 83.29 | 82.48 | f | 68.31 | d | 70.23 | 46.10 | j | 33.43 | h | 61.07 | ||||||
| 1979 | 33.45 | 40.07 | 49.97 | 54.21 | b | 67.21 | b | 77.10 | 85.32 | 81.23 | 79.00 | 64.68 | 42.05 | h | 44.45 | 61.52 | ||||||||||
| 1980 | 38.10 | 46.28 | 46.57 | a | 59.74 | c | 64.19 | 67.67 | 84.19 | 82.26 | 75.72 | a | 66.08 | f | 49.41 | h | 45.36 | f | 62.75 | |||||||
| 1981 | 41.80 | f | 44.42 | d | 45.65 | e | 58.00 | i | 64.52 | f | ----- | z | ----- | z | ----- | z | 78.67 | f | 54.24 | j | 50.75 | f | 40.13 | 43.40 | ||
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | 62.00 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.30 | ----- | z | 36.30 | ||
| 1983 | ----- | z | 44.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.43 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.67 | 44.46 | 48.68 | 55.08 | 66.26 | 73.73 | 85.28 | 82.45 | 75.70 | 63.32 | 47.51 | 40.85 | 60.26 | |||||||||||||
| S.D. | 2.63 | 3.83 | 4.43 | 5.88 | 4.52 | 3.64 | 2.57 | 5.38 | 4.49 | 4.85 | 5.33 | 4.21 | 0.00 | |||||||||||||
| SKEW | -0.66 | -0.07 | 0.42 | -0.02 | -0.81 | 0.45 | 1.05 | -0.26 | -0.10 | 0.21 | -1.03 | -0.29 | 0.00 | |||||||||||||
| MAX | 41.68 | 51.96 | 55.71 | 64.27 | 71.90 | 80.67 | 91.72 | 90.21 | 82.48 | 70.23 | 54.07 | 47.67 | 60.26 | |||||||||||||
| MIN | 33.45 | 37.07 | 42.70 | 45.63 | 55.86 | 67.67 | 81.42 | 73.10 | 68.31 | 56.62 | 36.30 | 33.77 | 60.26 | |||||||||||||
| NO YRS | 12 | 16 | 11 | 12 | 13 | 12 | 13 | 9 | 11 | 8 | 8 | 10 | 1 | |||||||||||||