| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1965 | ----- | z | ----- | z | ----- | z | 49.74 | g | 48.42 | g | 57.78 | 65.21 | 63.19 | 54.20 | 54.58 | 40.69 | d | 30.65 | 52.33 | |||||||
| 1966 | 31.66 | 31.98 | 40.63 | 47.88 | 55.47 | 56.98 | 64.63 | 68.60 | 62.07 | g | 47.77 | 38.60 | 33.62 | a | 47.07 | |||||||||||
| 1967 | 33.02 | b | 36.52 | a | 36.59 | d | 35.00 | k | 50.42 | a | 59.04 | b | 68.73 | 70.56 | d | 63.46 | e | 49.22 | f | 40.20 | b | 25.68 | 48.42 | |||
| 1968 | ----- | z | 39.32 | a | 43.07 | a | 44.02 | a | 51.75 | a | 61.93 | g | 72.17 | b | ----- | z | 57.81 | d | 48.27 | e | 37.82 | e | 29.44 | g | 49.28 | |
| 1969 | 29.44 | 29.86 | 35.84 | 46.76 | i | 55.88 | e | 58.24 | e | 67.53 | b | 64.76 | j | 60.96 | b | 45.13 | e | 41.56 | c | 34.44 | d | 45.89 | ||||
| 1970 | 33.84 | 39.36 | 38.45 | 39.33 | 53.45 | b | 60.69 | d | 69.58 | 68.27 | 54.32 | 45.97 | b | 40.33 | d | 27.76 | b | 47.61 | ||||||||
| 1971 | 32.37 | a | 35.40 | d | 35.38 | f | 43.72 | e | 50.30 | d | 56.54 | g | 66.85 | h | 71.72 | k | 54.43 | g | 47.79 | j | 39.06 | m | ----- | z | 40.44 | |
| 1972 | 29.89 | h | 36.20 | f | 43.80 | f | 40.03 | j | 53.52 | 61.82 | b | 68.26 | d | 67.02 | i | 53.63 | g | 46.43 | d | 36.88 | f | 21.23 | i | 57.51 | ||
| 1973 | 30.61 | d | 36.15 | d | 36.48 | h | 42.24 | c | 55.90 | f | 60.48 | h | 68.67 | g | 68.54 | h | 58.85 | g | 46.30 | h | 37.15 | j | 35.95 | i | 36.33 | |
| 1974 | 28.56 | n | 32.00 | f | 37.95 | i | 41.43 | o | 50.66 | i | 63.19 | i | 65.78 | a | 66.61 | l | 62.84 | h | 49.95 | l | 40.61 | h | 34.71 | l | 65.78 | |
| 1975 | 32.45 | b | 33.02 | d | 35.14 | f | 37.00 | 51.93 | d | 57.63 | d | 70.24 | f | 62.76 | d | 62.94 | e | 46.12 | f | 35.52 | i | 35.40 | a | 46.64 | ||
| 1976 | 33.12 | b | 33.65 | b | 33.20 | c | 40.85 | c | 53.48 | a | 56.34 | b | 68.22 | d | 60.27 | 61.22 | e | 50.74 | h | 41.74 | k | 34.75 | a | 47.51 | ||
| 1977 | 26.00 | 39.41 | e | 32.91 | d | 48.50 | b | 45.34 | c | 65.04 | c | 69.09 | c | 68.95 | 58.42 | 51.61 | i | 37.60 | e | 34.67 | a | 47.81 | ||||
| 1978 | 35.91 | d | 37.52 | 44.69 | 41.47 | 47.75 | a | 58.62 | a | 67.39 | 65.98 | g | 55.48 | d | 53.44 | 36.38 | j | 24.50 | h | 49.14 | ||||||
| 1979 | 24.19 | 32.75 | 39.89 | 43.45 | b | 53.48 | b | 61.12 | 69.55 | 65.79 | 62.58 | 53.00 | 32.86 | h | 36.29 | 49.28 | ||||||||||
| 1980 | 30.63 | 39.34 | 36.53 | a | 46.83 | c | 51.53 | 54.37 | 68.97 | 64.82 | 59.43 | a | 51.36 | f | 39.36 | i | 36.52 | f | 50.27 | |||||||
| 1981 | 34.46 | f | 34.61 | e | 37.54 | e | 44.85 | j | 50.19 | g | ----- | z | ----- | z | ----- | z | 59.81 | f | 43.64 | j | 41.60 | f | 34.10 | 35.41 | ||
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | 49.04 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.43 | ----- | z | 28.43 | ||
| 1983 | ----- | z | 37.41 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.41 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.10 | 35.75 | 38.12 | 43.21 | 51.87 | 58.97 | 68.09 | 65.91 | 59.17 | 49.32 | 38.15 | 32.73 | 47.61 | |||||||||||||
| S.D. | 3.29 | 3.05 | 3.73 | 3.56 | 2.94 | 2.84 | 2.03 | 3.43 | 3.41 | 3.76 | 4.18 | 3.53 | 0.00 | |||||||||||||
| SKEW | -0.84 | -0.31 | 0.29 | -0.04 | -0.78 | 0.55 | -0.02 | -0.24 | -0.27 | 0.36 | -1.77 | -1.06 | 0.00 | |||||||||||||
| MAX | 35.91 | 39.41 | 44.69 | 48.50 | 55.88 | 65.04 | 72.17 | 70.56 | 63.46 | 54.58 | 41.56 | 36.29 | 47.61 | |||||||||||||
| MIN | 24.19 | 29.86 | 32.91 | 37.00 | 45.34 | 54.37 | 64.63 | 60.27 | 54.20 | 45.13 | 28.43 | 25.68 | 47.61 | |||||||||||||
| NO YRS | 12 | 15 | 11 | 11 | 13 | 12 | 13 | 9 | 11 | 8 | 8 | 10 | 1 | |||||||||||||