| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.83 | 94.16 | 89.77 | a | 81.47 | 64.35 | 52.50 | 33.16 | 71.32 | e | ||||||
| 1967 | 41.97 | 47.57 | 53.74 | 54.50 | 68.81 | 74.14 | a | 92.84 | 92.00 | 79.67 | 67.77 | 53.97 | a | 37.39 | 63.70 | |||||||||||
| 1968 | 38.58 | 47.48 | 55.16 | 57.03 | 69.65 | 82.60 | 92.16 | 81.19 | 77.47 | 63.87 | 48.47 | 38.39 | 62.67 | |||||||||||||
| 1969 | 46.19 | 39.75 | 47.19 | 61.77 | 78.81 | 76.43 | 92.30 | a | 91.97 | 80.37 | 55.83 | a | 47.50 | ----- | z | 65.28 | a | |||||||||
| 1970 | ----- | z | 48.19 | l | 51.86 | c | 52.57 | p | 71.42 | 81.43 | 91.10 | 92.13 | 74.00 | a | ----- | z | ----- | z | ----- | z | 76.99 | f | ||||
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | 66.71 | 81.23 | 91.61 | 90.23 | 75.33 | 58.58 | 45.27 | 37.29 | 68.28 | d | ||||||||
| 1972 | 41.87 | 48.57 | a | 60.10 | 61.47 | 73.65 | 83.24 | i | 93.16 | 89.42 | 74.97 | 62.39 | 45.53 | 34.32 | 62.31 | a | ||||||||||
| 1973 | 32.26 | 40.57 | 46.03 | 57.13 | 74.19 | 83.55 | a | 89.45 | 90.35 | 77.20 | 66.42 | 48.30 | 42.00 | 62.29 | ||||||||||||
| 1974 | 39.13 | 43.46 | 56.00 | 57.64 | h | 74.55 | 89.13 | 92.47 | a | 90.06 | 81.53 | 64.16 | 51.85 | j | ----- | z | 70.06 | c | ||||||||
| 1975 | 40.29 | 44.11 | 49.06 | 51.63 | 68.10 | 79.00 | 92.70 | a | 88.10 | 79.89 | c | 60.21 | g | 45.70 | c | 44.10 | 62.06 | a | ||||||||
| 1976 | 42.13 | 45.72 | 48.42 | 58.37 | 74.94 | 82.88 | d | 93.03 | 85.32 | c | 77.20 | 62.13 | 53.24 | a | 41.71 | 63.76 | ||||||||||
| 1977 | 39.70 | h | 50.36 | n | 47.77 | 67.20 | 62.87 | 87.90 | 92.68 | 86.77 | 80.37 | 67.23 | 55.17 | 47.81 | 69.58 | b | ||||||||||
| 1978 | 42.13 | 46.71 | 56.35 | 60.57 | 69.84 | 83.50 | 93.58 | 89.39 | 78.03 | 68.55 | 45.43 | 35.68 | 64.15 | |||||||||||||
| 1979 | 30.16 | 42.68 | 51.03 | 61.90 | 73.61 | 85.47 | 94.03 | 88.70 | a | 83.97 | 68.65 | 43.10 | 43.83 | a | 63.93 | |||||||||||
| 1980 | 41.35 | 44.86 | 52.03 | 65.50 | 69.35 | 74.15 | q | 92.55 | 90.00 | 81.17 | 65.10 | ----- | z | 45.03 | 64.69 | b | ||||||||||
| 1981 | 36.16 | 49.00 | 54.29 | 66.03 | 70.77 | 84.87 | 94.03 | 94.94 | 82.90 | 62.65 | 55.14 | h | 49.32 | 67.72 | a | |||||||||||
| 1982 | 42.04 | e | 45.17 | e | 52.44 | f | 60.43 | g | 70.33 | d | 82.17 | g | 88.91 | i | 94.16 | f | 75.28 | e | 61.57 | h | 46.04 | d | 39.08 | e | 52.99 | f |
| 1983 | 43.46 | c | 45.76 | c | 53.79 | c | 53.75 | f | 71.04 | e | 80.40 | e | 92.15 | e | 85.17 | a | 76.96 | b | 63.03 | a | 47.59 | c | 39.67 | g | 65.94 | b |
| 1984 | 29.77 | a | 34.16 | d | 47.41 | b | 57.67 | c | 74.09 | h | 80.00 | d | 92.58 | e | 90.08 | g | 79.09 | g | 57.72 | f | 50.46 | d | 38.85 | d | 53.86 | d |
| 1985 | 33.12 | g | 40.36 | c | 50.93 | c | 69.96 | e | 77.88 | e | 89.92 | f | 94.26 | d | 93.15 | e | 73.81 | i | 62.08 | g | 43.54 | d | 28.97 | a | 62.38 | d |
| 1986 | 37.96 | d | 48.92 | c | 58.89 | c | 60.14 | b | 71.62 | e | 87.93 | a | 88.24 | b | 90.38 | b | 70.54 | b | 60.52 | ----- | z | ----- | z | 67.51 | b | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.94 | 77.97 | a | 64.48 | 45.50 | b | 39.64 | i | 68.47 | h | ||
| 1988 | 33.45 | 43.07 | 51.48 | b | 62.83 | f | 71.53 | a | 85.83 | 92.26 | 87.04 | g | 75.03 | 70.48 | 48.83 | 34.90 | 60.69 | b | ||||||||
| 1989 | 32.39 | 33.79 | 55.61 | 65.53 | 68.86 | b | 78.59 | c | 92.72 | b | 86.70 | a | 76.53 | 62.68 | 51.97 | a | 41.13 | a | 62.21 | |||||||
| 1990 | 43.10 | a | 40.59 | a | 53.13 | a | 64.73 | 68.33 | a | 84.92 | f | 90.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.06 | f | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.65 | 43.62 | 52.40 | 61.24 | 71.22 | 82.56 | 92.37 | 89.13 | 78.08 | 64.15 | 48.32 | 39.61 | 63.24 | |||||||||||||
| S.D. | 4.90 | 4.39 | 3.89 | 4.87 | 3.63 | 3.94 | 1.46 | 3.14 | 3.24 | 3.61 | 3.62 | 5.28 | 0.82 | |||||||||||||
| SKEW | -0.55 | -0.86 | 0.16 | -0.13 | 0.11 | -0.28 | -1.20 | -0.55 | -0.21 | -0.36 | 0.45 | 0.00 | -0.28 | |||||||||||||
| MAX | 46.19 | 49.00 | 60.10 | 69.96 | 78.81 | 89.13 | 94.26 | 94.94 | 83.97 | 70.48 | 55.17 | 49.32 | 64.15 | |||||||||||||
| MIN | 29.77 | 33.79 | 46.03 | 51.63 | 62.87 | 74.14 | 88.24 | 81.19 | 70.54 | 55.83 | 43.10 | 28.97 | 62.21 | |||||||||||||
| YRS | 19 | 20 | 21 | 17 | 22 | 19 | 23 | 21 | 22 | 19 | 19 | 18 | 7 | |||||||||||||