| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.18 | p | 68.21 | j | 65.15 | g | 60.10 | o | 45.29 | j | 33.56 | c | 32.58 | a | 33.07 | |
| 1957 | 16.58 | 29.43 | 35.40 | 43.19 | d | 54.71 | j | 59.89 | l | 60.60 | k | 61.05 | j | 61.22 | j | 43.28 | f | 37.02 | b | 34.65 | a | 32.71 | ||||
| 1958 | 31.57 | b | 38.73 | 35.13 | 41.70 | 58.66 | b | 61.57 | 69.50 | 69.23 | a | 56.75 | 51.02 | 35.07 | 35.02 | 48.66 | ||||||||||
| 1959 | 31.71 | 29.84 | 36.65 | 43.77 | 46.62 | b | 57.05 | 67.48 | 62.24 | 54.65 | d | 48.41 | b | 36.25 | 33.34 | 45.67 | ||||||||||
| 1960 | ----- | z | ----- | z | ----- | z | 43.27 | 47.18 | 58.28 | 70.20 | k | 60.52 | a | 58.67 | 49.31 | 35.52 | 28.61 | 47.67 | ||||||||
| 1961 | 31.34 | 36.54 | 37.24 | 42.90 | 49.69 | 63.65 | 67.92 | 70.98 | 54.34 | a | 45.95 | 33.57 | a | 29.15 | a | 46.94 | ||||||||||
| 1962 | 28.35 | a | 32.34 | 33.80 | a | 46.65 | 54.66 | 57.11 | b | ----- | z | 59.30 | a | 60.07 | 47.39 | h | 37.10 | i | 33.65 | 45.10 | ||||||
| 1963 | 25.02 | 39.54 | a | 37.47 | a | 39.73 | d | 49.93 | i | 56.22 | l | 58.36 | i | 63.66 | i | 62.61 | k | 49.14 | j | 36.88 | b | 28.85 | a | 34.58 | ||
| 1964 | 30.98 | 34.53 | 33.76 | 41.07 | 47.90 | k | 55.19 | i | 63.09 | h | 59.36 | i | 55.43 | i | 47.64 | j | 32.52 | a | 25.87 | a | 33.12 | |||||
| 1965 | 29.57 | a | 34.39 | 36.95 | 45.87 | g | 50.05 | k | 58.14 | h | 65.47 | k | 63.98 | i | 52.85 | j | 52.76 | l | 38.29 | f | 30.97 | a | 32.97 | |||
| 1966 | 30.05 | b | 31.89 | a | 36.60 | 44.61 | k | 54.48 | j | 55.32 | m | 62.16 | l | 65.64 | i | 58.34 | k | 47.52 | i | 37.98 | a | 33.93 | a | 34.09 | ||
| 1967 | 33.44 | 36.12 | 35.24 | 38.02 | b | 50.14 | i | 61.33 | j | 65.30 | p | 73.25 | s | 63.97 | m | 47.00 | l | 38.07 | i | ----- | z | 35.71 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 28.86 | 34.34 | 35.82 | 42.25 | 51.36 | 59.53 | 68.30 | 64.46 | 56.90 | 48.67 | 35.37 | 31.51 | 47.09 | |||||||||||||
| S.D. | 4.89 | 3.48 | 1.36 | 2.50 | 5.17 | 2.95 | 1.06 | 5.30 | 2.49 | 2.11 | 1.85 | 3.00 | 1.50 | |||||||||||||
| SKEW | -1.75 | 0.03 | -0.38 | -0.03 | 0.48 | 0.51 | 0.87 | 0.33 | 0.17 | -0.28 | -0.19 | -0.51 | 0.14 | |||||||||||||
| MAX | 33.44 | 39.54 | 37.47 | 46.65 | 58.66 | 63.65 | 69.50 | 70.98 | 60.07 | 51.02 | 37.98 | 35.02 | 48.66 | |||||||||||||
| MIN | 16.58 | 29.43 | 33.76 | 38.02 | 46.62 | 57.05 | 67.48 | 59.30 | 54.34 | 45.95 | 32.52 | 25.87 | 45.67 | |||||||||||||
| NO YRS | 10 | 10 | 10 | 9 | 5 | 5 | 3 | 5 | 5 | 4 | 9 | 11 | 3 | |||||||||||||