| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.56 | 24.56 | ||
| 1955 | 18.79 | 17.45 | 20.81 | 28.15 | 41.47 | 53.75 | 59.69 | 67.50 | 53.10 | 43.32 | 23.58 | 23.50 | d | 37.59 | ||||||||||||
| 1956 | 21.85 | 17.81 | 26.74 | 37.20 | 46.76 | 51.50 | 64.56 | 60.63 | 56.28 | e | 38.03 | 32.37 | ----- | z | 41.25 | |||||||||||
| 1957 | 14.48 | 26.98 | 27.16 | 33.82 | 44.00 | 53.26 | a | 63.65 | a | 62.40 | 57.02 | 38.00 | 26.47 | 25.64 | c | 39.41 | ||||||||||
| 1958 | 25.66 | b | 27.71 | b | 24.22 | a | 30.98 | 52.52 | 53.02 | 61.89 | 66.11 | 51.48 | 47.23 | a | 29.79 | a | 29.97 | 41.71 | ||||||||
| 1959 | 22.90 | 22.09 | 25.66 | 37.97 | 38.98 | 57.15 | 67.11 | 61.05 | 46.60 | 41.76 | 33.00 | 27.81 | 40.17 | |||||||||||||
| 1960 | 17.81 | 18.12 | a | 30.61 | 35.47 | 41.34 | 57.40 | 70.60 | 59.00 | 57.75 | 42.16 | 28.50 | 27.18 | 40.49 | ||||||||||||
| 1961 | 25.79 | q | 25.84 | 27.53 | 33.32 | 44.55 | 61.83 | 66.77 | 68.03 | 45.63 | 39.58 | 27.43 | 19.66 | 41.83 | ||||||||||||
| 1962 | 20.10 | 23.21 | 23.56 | 39.45 | 40.53 | 53.67 | 61.13 | 60.40 | a | 55.95 | 44.69 | 32.03 | 30.16 | 40.41 | ||||||||||||
| 1963 | 17.56 | 31.82 | 26.52 | b | 29.29 | d | 45.52 | 47.11 | c | 60.63 | 65.08 | 58.15 | 46.48 | 30.58 | 26.66 | 40.45 | ||||||||||
| 1964 | 19.47 | 21.28 | ----- | z | 32.33 | 42.47 | 49.00 | 64.27 | 59.10 | 51.03 | 46.69 | 28.93 | c | 18.61 | h | 41.46 | ||||||||||
| 1965 | 25.34 | b | 24.59 | a | 24.35 | a | 35.88 | ----- | z | 51.80 | b | 62.75 | c | 58.45 | a | ----- | z | 50.43 | a | 35.13 | c | 25.80 | a | 39.45 | ||
| 1966 | 21.73 | e | 20.72 | a | 30.13 | d | ----- | z | 51.16 | 52.73 | 65.10 | 63.45 | 58.77 | 42.60 | b | 33.83 | 24.30 | f | 44.02 | |||||||
| 1967 | 21.80 | f | 25.59 | a | ----- | z | 27.33 | d | 46.18 | c | 53.67 | d | 66.81 | 69.89 | 60.36 | a | 41.18 | a | ----- | z | 20.55 | c | 45.73 | |||
| 1968 | 23.48 | f | 35.39 | k | 32.16 | 31.73 | 42.56 | ----- | z | 66.92 | a | ----- | z | 51.92 | 40.80 | c | 27.57 | 19.88 | k | 41.95 | ||||||
| 1969 | 15.03 | m | 18.54 | 23.96 | g | 36.17 | 49.53 | 53.47 | 64.24 | 66.17 | a | 57.02 | 34.81 | g | 36.36 | h | 27.73 | 46.61 | ||||||||
| 1970 | 21.81 | 30.13 | b | 24.06 | 26.60 | 43.92 | 55.98 | 64.40 | 67.66 | 48.12 | b | 40.81 | d | 29.66 | b | ----- | z | 41.20 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 20.63 | 23.46 | 26.42 | 33.05 | 44.77 | 53.69 | 64.41 | 63.66 | 53.95 | 42.92 | 29.92 | 25.77 | 40.03 | |||||||||||||
| S.D. | 3.26 | 4.56 | 3.18 | 4.01 | 3.92 | 3.51 | 2.84 | 3.79 | 4.64 | 3.57 | 3.16 | 3.29 | 1.27 | |||||||||||||
| SKEW | -0.11 | 0.25 | 0.22 | -0.13 | 0.58 | 0.41 | 0.26 | 0.08 | -0.47 | 0.50 | -0.18 | -0.55 | -0.87 | |||||||||||||
| MAX | 25.66 | 31.82 | 32.16 | 39.45 | 52.52 | 61.83 | 70.60 | 69.89 | 60.36 | 50.43 | 35.13 | 30.16 | 41.71 | |||||||||||||
| MIN | 14.48 | 17.45 | 20.81 | 26.60 | 38.98 | 47.11 | 59.69 | 58.45 | 45.63 | 38.00 | 23.58 | 19.66 | 37.59 | |||||||||||||
| NO YRS | 12 | 15 | 13 | 15 | 15 | 15 | 16 | 15 | 15 | 15 | 14 | 12 | 7 | |||||||||||||