| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.72 | 47.24 | b | 36.70 | c | 27.88 | b | 41.14 | ||
| 1960 | 23.15 | 27.59 | a | 37.44 | 40.92 | 45.31 | 61.24 | a | 68.66 | 61.98 | a | 59.46 | b | 44.94 | 33.54 | e | 30.71 | 44.58 | ||||||||
| 1961 | 32.03 | 33.61 | 34.42 | a | 40.28 | 46.76 | 63.81 | a | 67.75 | c | 67.06 | d | 51.94 | f | 44.84 | 32.57 | c | 28.34 | 44.68 | |||||||
| 1962 | 20.05 | b | 28.21 | 30.10 | 45.95 | 45.47 | 59.39 | c | 64.43 | b | 61.94 | 58.79 | d | 46.82 | 37.62 | d | 34.50 | d | 44.44 | |||||||
| 1963 | 25.55 | b | 39.50 | 33.13 | a | 35.27 | 51.40 | e | 53.52 | 60.02 | b | 61.97 | b | 59.10 | 49.23 | c | 36.79 | b | 31.10 | 44.71 | ||||||
| 1964 | 26.37 | 26.03 | 30.82 | a | 39.39 | b | 46.13 | e | 52.65 | c | 65.05 | a | 60.71 | c | 52.09 | c | 50.05 | 30.79 | b | 30.26 | 42.53 | |||||
| 1965 | 27.63 | 31.57 | 35.08 | 42.37 | d | 45.92 | a | 56.00 | 62.83 | d | 60.21 | 50.26 | c | 49.65 | 37.81 | a | 28.77 | e | 44.01 | |||||||
| 1966 | 27.48 | 26.00 | 34.23 | 43.97 | 53.94 | d | 56.08 | 63.28 | d | 66.28 | a | 56.37 | 44.64 | b | 37.27 | 29.97 | b | 44.96 | ||||||||
| 1967 | 29.69 | b | 33.09 | a | 34.15 | d | 32.93 | a | 48.13 | d | 55.18 | 67.81 | 69.19 | 64.50 | n | 45.44 | 38.08 | 20.87 | d | 43.14 | ||||||
| 1968 | 26.29 | ----- | z | 37.68 | 39.27 | 47.44 | 57.92 | 68.63 | 58.48 | 54.68 | 45.55 | 34.47 | 29.06 | 45.41 | ||||||||||||
| 1969 | 28.71 | 25.93 | 29.37 | 41.52 | 52.73 | 59.37 | k | 65.76 | 64.79 | 57.48 | 40.08 | 37.00 | 31.29 | 43.15 | ||||||||||||
| 1970 | 29.53 | 36.12 | 34.03 | 35.27 | 49.09 | b | 59.08 | 66.32 | 64.95 | 51.54 | d | 42.63 | 37.47 | 23.60 | 44.14 | |||||||||||
| 1971 | 30.31 | 31.61 | 30.29 | 38.50 | 45.60 | 53.32 | 64.16 | 67.90 | 51.23 | 40.02 | 35.34 | a | 23.06 | 42.61 | ||||||||||||
| 1972 | 24.27 | 30.84 | 39.42 | 38.63 | 51.03 | a | 59.57 | 66.21 | 65.21 | 52.67 | 44.74 | 31.73 | 23.74 | b | 44.01 | |||||||||||
| 1973 | 24.74 | 30.25 | 32.18 | 41.38 | 53.39 | 57.65 | 67.53 | 63.44 | 55.23 | 43.79 | 36.31 | f | 32.68 | 45.66 | ||||||||||||
| 1974 | 24.71 | c | 28.43 | 33.08 | 37.70 | 48.48 | 62.00 | 64.60 | 64.56 | g | 59.13 | 44.77 | a | 37.13 | k | 26.15 | a | 42.91 | ||||||||
| 1975 | 25.18 | f | 27.17 | h | 29.38 | a | 32.02 | a | 43.53 | k | 50.55 | t | 66.33 | a | 61.03 | k | 57.68 | b | 40.42 | f | ----- | z | 27.59 | o | 46.35 | |
| 1976 | 28.13 | a | 29.41 | 27.83 | b | 39.00 | p | 50.22 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.90 | ||
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.10 | j | 31.60 | 29.61 | h | 31.60 | ||
| 1980 | 28.19 | 36.45 | 33.69 | m | 38.75 | 49.80 | f | 51.38 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.69 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.87 | 30.92 | 33.09 | 39.07 | 48.81 | 57.25 | 65.59 | 63.87 | 55.23 | 45.28 | 35.25 | 28.25 | 44.00 | |||||||||||||
| S.D. | 2.96 | 4.04 | 3.23 | 3.69 | 2.97 | 3.66 | 2.34 | 3.14 | 3.28 | 2.93 | 2.58 | 3.81 | 0.87 | |||||||||||||
| SKEW | -0.45 | 0.56 | 0.26 | -0.23 | 0.40 | 0.08 | -0.68 | 0.03 | -0.07 | -0.11 | -0.53 | -0.41 | -0.79 | |||||||||||||
| MAX | 32.03 | 39.50 | 39.42 | 45.95 | 53.94 | 63.81 | 68.66 | 69.19 | 59.46 | 50.05 | 38.08 | 34.50 | 44.96 | |||||||||||||
| MIN | 20.05 | 25.93 | 27.83 | 32.02 | 45.31 | 51.38 | 60.02 | 58.48 | 50.26 | 40.02 | 30.79 | 20.87 | 42.53 | |||||||||||||
| NO YRS | 17 | 16 | 17 | 17 | 16 | 15 | 16 | 14 | 15 | 16 | 15 | 16 | 9 | |||||||||||||