| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1969 | ----- | z | ----- | z | ----- | z | 47.76 | i | 58.17 | b | 64.90 | 66.98 | b | 65.21 | e | 59.95 | a | 46.06 | 42.95 | b | 34.40 | e | 54.83 | |||
| 1970 | 32.42 | 38.16 | 41.48 | d | 42.15 | d | 55.23 | 65.62 | 69.74 | 68.76 | 56.17 | 46.24 | 38.30 | 33.06 | 48.94 | |||||||||||
| 1971 | 36.79 | 37.59 | 37.45 | 44.75 | 54.87 | 57.42 | 68.98 | a | 72.05 | 54.80 | 47.68 | a | 39.82 | 33.98 | 48.85 | |||||||||||
| 1972 | 32.73 | 36.64 | 45.02 | 43.28 | 55.80 | a | 61.75 | 68.24 | 68.02 | 55.47 | 47.82 | 41.27 | 26.40 | 48.54 | ||||||||||||
| 1973 | 29.13 | 36.34 | 41.56 | 46.97 | 54.89 | 60.57 | 69.32 | 65.94 | 58.95 | 48.63 | 36.47 | 37.29 | 48.84 | |||||||||||||
| 1974 | 24.88 | a | 38.38 | 40.85 | 45.53 | 51.18 | 64.48 | 65.19 | 67.66 | 61.10 | 49.00 | 40.03 | 36.32 | 48.72 | ||||||||||||
| 1975 | 34.98 | 32.89 | 37.97 | 41.83 | 53.16 | 58.28 | 69.69 | 63.85 | a | 59.77 | 48.44 | 38.68 | 36.85 | 48.03 | ||||||||||||
| 1976 | 35.52 | d | 35.59 | 39.11 | 44.47 | 51.95 | i | 56.88 | b | 69.06 | n | 63.92 | 61.75 | 49.53 | 41.37 | 34.90 | 46.30 | |||||||||
| 1977 | 28.24 | 38.11 | 40.68 | 50.97 | 49.44 | 65.05 | 66.97 | 71.66 | 56.07 | 48.90 | 36.63 | 34.21 | 48.91 | |||||||||||||
| 1978 | 31.63 | 37.30 | 43.74 | 46.03 | 51.24 | f | 61.73 | 67.42 | 65.40 | 56.53 | 50.19 | 32.90 | 29.29 | 47.47 | ||||||||||||
| 1979 | 15.94 | 34.93 | 42.87 | 47.02 | 56.82 | a | 61.96 | b | 69.20 | a | 67.23 | a | 62.86 | a | 52.71 | 35.30 | 36.53 | b | 48.61 | |||||||
| 1980 | 24.88 | b | 34.28 | 40.65 | 48.82 | b | 54.40 | 56.98 | c | 68.56 | 64.60 | a | 61.72 | a | 49.81 | 41.00 | 39.29 | 48.75 | ||||||||
| 1981 | 34.28 | a | 37.02 | 42.89 | 48.05 | b | 53.33 | b | 58.61 | b | 65.71 | b | 70.32 | c | 60.95 | 49.08 | 40.95 | 34.45 | 49.64 | |||||||
| 1982 | 33.71 | 35.29 | 40.55 | 43.93 | 54.10 | 63.33 | 67.02 | 67.71 | 58.00 | 47.95 | 35.57 | 32.42 | 48.30 | |||||||||||||
| 1983 | 38.11 | 39.16 | 43.77 | 46.10 | 56.26 | 58.80 | 63.21 | 67.82 | 56.13 | 50.42 | 41.28 | 23.66 | 48.73 | |||||||||||||
| 1984 | 35.16 | 37.98 | 43.81 | 44.07 | 50.69 | 57.55 | 69.24 | 67.73 | 57.32 | 45.97 | 37.65 | 30.42 | 48.13 | |||||||||||||
| 1985 | 27.69 | 34.64 | 40.02 | 49.90 | 54.02 | 62.18 | 73.43 | a | 65.52 | 53.55 | 48.71 | 27.20 | 20.05 | 46.41 | ||||||||||||
| 1986 | 34.77 | 36.86 | 45.98 | 45.42 | 55.47 | 65.70 | 64.21 | 72.00 | 55.32 | 51.34 | 41.71 | i | 31.76 | 50.80 | ||||||||||||
| 1987 | 31.63 | 37.45 | 43.00 | 52.00 | h | 58.15 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.00 | l | 37.86 | q | 42.56 | |||||
| 1988 | 30.82 | n | ----- | z | ----- | z | 49.82 | m | 53.88 | o | 56.17 | o | 71.53 | m | 68.36 | i | 62.08 | 57.05 | 42.18 | 34.65 | 48.99 | |||||
| 1989 | 37.10 | 26.07 | 40.31 | 50.38 | 55.10 | 63.52 | 67.02 | j | 65.23 | 60.53 | j | 50.98 | 43.35 | 35.03 | 46.71 | |||||||||||
| 1990 | 37.79 | 35.88 | 43.98 | 52.65 | 53.03 | 60.98 | 70.73 | 69.81 | j | 65.82 | j | 50.08 | 42.05 | k | 26.61 | 47.97 | ||||||||||
| 1991 | 33.62 | j | 44.11 | 40.52 | 47.52 | 52.05 | i | 57.77 | 70.90 | 71.65 | ----- | z | ----- | z | ----- | z | ----- | z | 55.41 | |||||||
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | 59.32 | 67.88 | 69.24 | 70.81 | 61.05 | 54.02 | 40.65 | 30.69 | 56.71 | |||||||||
| 1993 | 25.94 | 28.62 | 42.23 | 48.33 | 58.08 | 60.00 | 62.42 | 66.21 | 63.33 | 52.71 | 33.92 | 33.89 | 47.97 | |||||||||||||
| 1994 | 41.00 | 34.12 | 46.00 | 51.17 | 57.32 | 62.15 | 74.27 | 70.19 | 66.20 | 50.24 | 37.90 | 35.74 | 52.19 | |||||||||||||
| 1995 | 34.40 | 41.64 | 43.36 | i | 47.68 | 56.85 | 61.33 | 68.52 | 65.45 | 64.83 | 50.08 | 46.98 | 34.19 | 52.00 | ||||||||||||
| 1996 | 36.89 | 33.72 | 42.58 | 50.10 | 52.56 | 61.98 | 72.89 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.10 | ||||||||
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.33 | l | 68.19 | m | 71.32 | 61.78 | ----- | z | ----- | z | 34.31 | 55.80 | ||||
| 1998 | 35.11 | 38.41 | ----- | z | 46.30 | 52.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.06 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 32.43 | 36.20 | 41.96 | 46.94 | 54.83 | 61.44 | 68.42 | 67.85 | 59.40 | 49.75 | 38.80 | 32.71 | 48.72 | |||||||||||||
| S.D. | 5.48 | 3.56 | 2.27 | 2.90 | 2.51 | 3.06 | 2.97 | 2.71 | 3.43 | 2.51 | 4.15 | 4.42 | 1.15 | |||||||||||||
| SKEW | -1.16 | -0.74 | -0.05 | 0.11 | -0.22 | 0.17 | -0.08 | 0.22 | 0.09 | 0.94 | -0.75 | -1.26 | 1.24 | |||||||||||||
| MAX | 41.00 | 44.11 | 46.00 | 52.65 | 59.32 | 67.88 | 74.27 | 72.05 | 66.20 | 57.05 | 46.98 | 39.29 | 52.19 | |||||||||||||
| MIN | 15.94 | 26.07 | 37.45 | 41.83 | 49.44 | 56.88 | 62.42 | 63.85 | 53.55 | 45.97 | 27.20 | 20.05 | 46.41 | |||||||||||||
| NO YRS | 25 | 26 | 24 | 25 | 25 | 26 | 24 | 25 | 24 | 25 | 23 | 26 | 16 | |||||||||||||