| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | 33.44 | f | 38.10 | 41.56 | f | 43.10 | j | 40.63 | 33.58 | e | 27.73 | h | 26.68 | f | 37.44 | |||
| 1963 | 13.89 | c | 30.14 | 26.24 | b | 28.50 | 38.26 | 40.40 | 42.16 | 45.32 | 45.38 | a | 35.50 | a | 28.80 | 23.21 | b | 33.15 | ||||||||
| 1964 | 18.65 | 15.55 | 22.13 | a | 25.40 | 29.84 | f | 41.43 | 46.48 | ----- | z | 35.53 | 32.13 | a | 24.55 | a | 21.58 | e | 28.34 | |||||||
| 1965 | 22.35 | 24.84 | c | 23.17 | b | 31.86 | a | 32.64 | c | 41.66 | a | 46.48 | 46.29 | 33.53 | 33.81 | 28.19 | d | 20.59 | d | 32.12 | ||||||
| 1966 | 19.04 | g | 16.55 | h | 24.04 | d | 28.37 | c | 35.26 | 40.96 | e | 44.32 | 44.52 | 41.52 | c | 31.08 | e | 30.12 | n | 23.04 | d | 34.79 | ||||
| 1967 | 21.96 | e | 23.27 | b | 25.48 | f | 25.63 | c | 33.45 | b | 42.12 | d | 46.94 | 48.39 | 42.53 | 32.00 | b | 25.82 | b | 16.68 | c | 32.62 | ||||
| 1968 | 19.86 | c | 28.14 | a | 26.57 | a | 25.37 | 34.29 | 41.90 | 47.13 | 44.26 | 38.37 | 30.69 | b | 28.97 | 17.77 | e | 31.94 | ||||||||
| 1969 | 18.16 | 18.56 | a | 20.57 | a | 28.80 | 36.81 | 44.57 | 44.48 | 42.65 | 40.50 | 29.23 | 25.69 | d | 23.00 | j | 31.82 | |||||||||
| 1970 | 24.88 | e | 25.04 | 24.29 | 24.10 | a | 33.74 | 46.31 | a | 47.77 | 45.29 | 34.77 | 29.77 | 29.74 | c | 17.15 | d | 31.91 | ||||||||
| 1971 | 19.35 | 20.48 | a | 21.87 | 28.21 | a | 35.77 | 39.79 | b | 47.26 | 50.52 | 35.13 | 29.52 | 25.54 | f | 16.72 | f | 32.79 | ||||||||
| 1972 | 16.52 | f | 21.50 | c | 29.41 | d | 27.92 | d | 36.27 | a | 42.17 | a | 45.35 | 46.52 | 34.93 | 29.77 | 28.90 | 14.20 | f | 34.27 | ||||||
| 1973 | 15.60 | f | 26.14 | 25.04 | c | 26.73 | 35.32 | 40.37 | 44.81 | 43.94 | 39.20 | 31.61 | 28.03 | 27.10 | b | 33.48 | ||||||||||
| 1974 | 11.52 | b | 22.54 | 25.59 | b | 28.65 | d | 32.71 | 43.07 | a | 44.87 | 44.87 | ----- | z | ----- | z | ----- | z | ----- | z | 31.73 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 18.96 | 23.29 | 24.45 | 27.46 | 34.96 | 41.76 | 45.67 | 45.69 | 38.50 | 31.56 | 27.63 | 20.89 | 32.28 | |||||||||||||
| S.D. | 4.16 | 4.22 | 2.51 | 2.11 | 1.78 | 2.09 | 1.62 | 2.20 | 3.73 | 1.96 | 1.81 | 3.60 | 0.59 | |||||||||||||
| SKEW | -0.49 | -0.18 | 0.33 | 0.30 | 0.30 | 0.54 | -0.65 | 0.93 | 0.28 | 0.60 | -0.60 | 0.35 | 1.06 | |||||||||||||
| MAX | 24.88 | 30.14 | 29.41 | 31.86 | 38.26 | 46.31 | 47.77 | 50.52 | 45.38 | 35.50 | 29.74 | 27.10 | 33.15 | |||||||||||||
| MIN | 11.52 | 15.55 | 20.57 | 24.10 | 32.64 | 38.10 | 42.16 | 42.65 | 33.53 | 29.23 | 24.55 | 16.68 | 31.91 | |||||||||||||
| NO YRS | 9 | 11 | 11 | 12 | 11 | 13 | 12 | 11 | 12 | 12 | 9 | 8 | 4 | |||||||||||||