| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1949 | 17.63 | 22.84 | 29.18 | a | 39.54 | d | 42.65 | a | 53.55 | 58.47 | 55.81 | 54.48 | a | 43.53 | 40.13 | 27.82 | 40.47 | |||||||||
| 1950 | 20.50 | 29.57 | 29.50 | 37.27 | 41.68 | 48.63 | 60.39 | 58.18 | 51.68 | 44.32 | 39.40 | 34.53 | 41.30 | |||||||||||||
| 1951 | 25.52 | 27.39 | 30.44 | 39.10 | 42.55 | a | 54.24 | a | 59.40 | 57.62 | b | 56.88 | 41.16 | 33.52 | 23.79 | 40.97 | ||||||||||
| 1952 | 20.21 | 26.36 | 24.68 | 37.97 | 42.65 | 45.00 | e | ----- | z | ----- | z | ----- | z | 50.22 | a | 30.72 | 26.81 | 33.84 | c | |||||||
| 1953 | 30.55 | b | 29.25 | 30.06 | 34.03 | 35.03 | 43.54 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.74 | f | ||||
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1959 | 28.58 | 25.04 | 34.42 | 40.10 | 39.74 | 54.12 | 62.08 | 57.63 | 50.45 | 47.29 | 40.17 | a | 31.69 | 42.61 | ||||||||||||
| 1960 | 23.53 | 25.21 | a | 32.61 | 35.13 | 40.15 | 56.78 | 62.15 | 58.55 | c | 56.25 | 44.58 | 30.93 | 27.77 | 41.14 | |||||||||||
| 1961 | 30.92 | 29.43 | 28.42 | 35.95 | 39.92 | 56.55 | 60.44 | 58.85 | a | 50.78 | 43.39 | 32.83 | 26.42 | 41.16 | ||||||||||||
| 1962 | 26.89 | 26.12 | 24.73 | 39.42 | 38.47 | 51.68 | 57.92 | 57.35 | 55.30 | 44.65 | 36.75 | 32.87 | 41.01 | |||||||||||||
| 1963 | 28.56 | 35.98 | 28.84 | 27.27 | 42.35 | 47.65 | 55.05 | 55.50 | 54.33 | 44.98 | a | 31.28 | 30.76 | 40.21 | ||||||||||||
| 1964 | 24.43 | a | 27.29 | a | 27.85 | a | 33.93 | 38.59 | b | 47.93 | 58.40 | 58.02 | 50.15 | 49.55 | 28.39 | c | ----- | z | 40.41 | a | ||||||
| 1965 | 26.81 | 29.57 | 31.03 | 34.83 | 39.66 | 49.19 | a | 57.69 | 56.06 | 48.15 | 49.05 | 33.57 | 25.29 | 40.08 | ||||||||||||
| 1966 | 24.10 | a | 21.98 | 30.92 | 40.91 | a | 49.81 | b | 52.75 | 57.85 | 61.53 | 54.72 | 47.40 | 35.50 | a | 28.50 | c | 42.17 | ||||||||
| 1967 | 29.73 | a | 31.61 | a | 29.53 | b | 23.82 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.67 | h |
| 1968 | 26.77 | g | 32.50 | h | 33.35 | 37.48 | a | 42.82 | 55.03 | 61.89 | 54.60 | 54.17 | 44.68 | 34.70 | 23.45 | a | 44.22 | b | ||||||||
| 1969 | 27.66 | 22.84 | 30.21 | 36.20 | 45.63 | 48.26 | a | 59.60 | 59.90 | 55.45 | 40.29 | 37.63 | 31.11 | 41.23 | ||||||||||||
| 1970 | 28.58 | a | 32.86 | 32.89 | 32.82 | 45.02 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.43 | g | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 25.89 | 27.71 | 29.92 | 35.63 | 41.67 | 50.99 | 59.33 | 57.66 | 53.29 | 45.36 | 34.68 | 28.52 | 41.12 | |||||||||||||
| S.D. | 3.91 | 3.84 | 2.67 | 4.51 | 3.41 | 4.14 | 2.07 | 1.89 | 2.72 | 2.99 | 3.75 | 3.46 | 0.76 | |||||||||||||
| SKEW | -0.66 | 0.40 | -0.40 | -1.30 | 0.46 | -0.23 | -0.28 | 0.29 | -0.49 | 0.10 | 0.08 | 0.15 | 0.54 | |||||||||||||
| MAX | 30.92 | 35.98 | 34.42 | 40.91 | 49.81 | 56.78 | 62.15 | 61.53 | 56.88 | 50.22 | 40.17 | 34.53 | 42.61 | |||||||||||||
| MIN | 17.63 | 21.98 | 24.68 | 23.82 | 35.03 | 43.54 | 55.05 | 54.60 | 48.15 | 40.29 | 28.39 | 23.45 | 40.08 | |||||||||||||
| YRS | 16 | 16 | 17 | 17 | 16 | 15 | 13 | 13 | 13 | 14 | 14 | 13 | 11 | |||||||||||||