| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | 54.54 | g | 64.37 | 66.45 | 69.56 | 58.20 | 53.76 | 43.72 | 40.31 | 56.62 | ||||||||
| 1962 | 37.81 | 41.88 | d | 43.55 | a | 51.40 | 50.13 | a | ----- | z | ----- | z | ----- | z | 60.86 | l | 51.84 | 46.50 | 41.29 | 45.55 | ||||||
| 1963 | 34.16 | 47.93 | 44.40 | 46.55 | 54.27 | 58.35 | 61.13 | 64.84 | 63.77 | 53.87 | 45.65 | 39.11 | 51.17 | |||||||||||||
| 1964 | 40.63 | 41.14 | 43.34 | 47.10 | 51.21 | 57.85 | 63.92 | 62.90 | 59.02 | 53.79 | 41.53 | 38.63 | 50.09 | |||||||||||||
| 1965 | 38.94 | 42.62 | 46.40 | 50.38 | 51.06 | 57.92 | 64.74 | 65.32 | 59.45 | 54.00 | 46.57 | 36.27 | 51.14 | |||||||||||||
| 1966 | 39.27 | 40.71 | 43.45 | 50.07 | 54.02 | 58.85 | 62.94 | 64.94 | 61.72 | 51.92 | 46.12 | 43.16 | 51.43 | |||||||||||||
| 1967 | 42.19 | 41.89 | 41.87 | 44.12 | 53.82 | 62.10 | 65.95 | 69.97 | 64.40 | 51.87 | 46.30 | 39.84 | 52.03 | |||||||||||||
| 1968 | 39.08 | 47.09 | 46.35 | 46.87 | 52.92 | 59.22 | 64.77 | 62.34 | 59.43 | 50.10 | 44.67 | 36.84 | 50.81 | |||||||||||||
| 1969 | 32.92 | 38.18 | 45.03 | 47.38 | 56.58 | 63.45 | 63.16 | 61.90 | 60.32 | 49.87 | 44.85 | 40.52 | 50.35 | |||||||||||||
| 1970 | 40.08 | 44.52 | 44.95 | 45.02 | 52.97 | 62.12 | 64.37 | 63.24 | 56.97 | 50.45 | 45.13 | 38.00 | 50.65 | |||||||||||||
| 1971 | 38.39 | 40.41 | 40.50 | 46.33 | 53.39 | 54.88 | 64.79 | 66.60 | 57.67 | 49.26 | 43.02 | 37.53 | 49.40 | |||||||||||||
| 1972 | 37.10 | 41.47 | 46.40 | 44.15 | 55.61 | 59.23 | 66.23 | 66.60 | 57.67 | 51.84 | 44.52 | 34.52 | 50.44 | |||||||||||||
| 1973 | 36.58 | 43.20 | 43.53 | 48.67 | 54.98 | 59.00 | 64.31 | 61.50 | 60.82 | 50.81 | 41.93 | 42.73 | 50.67 | |||||||||||||
| 1974 | 35.94 | 39.59 | 43.79 | 47.35 | 51.16 | 60.00 | 63.50 | 66.00 | 65.95 | 53.63 | 45.65 | 42.05 | 51.22 | |||||||||||||
| 1975 | 41.50 | 39.64 | 42.24 | 44.40 | 53.10 | 57.65 | 64.31 | 61.84 | 62.57 | 50.63 | 42.92 | 41.85 | 50.22 | |||||||||||||
| 1976 | 40.42 | 40.72 | 42.35 | 46.20 | 53.32 | 56.17 | 62.87 | 62.61 | 61.70 | 52.92 | 46.77 | 37.60 | 50.30 | |||||||||||||
| 1977 | 36.94 | 44.16 | 42.45 | 49.93 | 50.35 | 60.00 | 62.63 | 68.53 | 58.32 | 52.21 | 42.65 | 42.58 | 50.90 | |||||||||||||
| 1978 | 40.35 | a | 44.30 | 48.05 | 48.22 | 51.34 | 61.38 | 65.37 | 64.74 | 58.08 | 53.77 | 39.15 | 34.76 | 50.79 | ||||||||||||
| 1979 | 30.50 | 40.62 | 47.02 | 49.22 | 55.24 | ----- | z | 65.15 | 64.16 | 62.42 | 55.34 | 42.33 | 42.84 | 50.44 | ||||||||||||
| 1980 | 36.24 | 42.14 | 43.95 | 49.73 | 53.00 | 55.45 | 64.48 | 62.11 | 60.22 | 52.95 | 45.90 | 41.40 | 50.63 | |||||||||||||
| 1981 | 41.44 | 41.38 | 45.81 | 49.23 | 52.63 | 57.48 | 63.82 | 67.39 | 60.78 | 51.35 | 45.48 | 41.90 | 51.56 | |||||||||||||
| 1982 | 36.11 | 40.54 | 43.55 | 45.10 | 53.89 | 61.55 | 62.81 | 64.44 | 61.22 | 52.71 | 41.41 | a | 39.31 | 50.22 | ||||||||||||
| 1983 | 41.73 | 45.05 | 47.26 | 49.05 | 55.74 | 58.17 | 61.89 | 64.55 | 58.22 | 51.69 | 46.32 | 34.69 | 51.20 | |||||||||||||
| 1984 | 40.52 | 43.31 | 47.90 | 46.98 | 52.35 | 56.72 | 64.58 | 64.08 | 59.88 | 49.16 | 43.95 | 36.27 | 50.48 | |||||||||||||
| 1985 | 35.95 | 39.41 | 43.29 | 50.80 | 54.06 | 60.15 | 68.11 | 63.77 | 57.27 | 51.45 | 36.70 | 34.66 | 49.64 | |||||||||||||
| 1986 | 42.21 | 42.84 | 49.31 | 47.90 | 54.10 | 63.22 | 61.81 | 69.05 | 57.88 | 54.00 | 46.32 | 39.03 | 52.30 | |||||||||||||
| 1987 | 39.00 | 43.27 | 45.76 | 51.57 | 56.40 | a | 61.92 | 63.11 | 66.29 | 62.35 | 57.97 | 45.40 | 37.35 | 52.53 | ||||||||||||
| 1988 | 37.19 | 42.82 | a | 44.79 | 49.78 | 52.44 | 57.98 | a | 65.00 | a | 64.52 | a | 61.48 | 56.58 | 44.72 | 37.45 | 51.23 | |||||||||
| 1989 | 39.69 | 34.18 | 43.68 | 53.52 | 54.06 | 61.28 | 61.85 | 62.85 | 63.32 | 52.02 | 45.00 | 37.94 | 50.78 | |||||||||||||
| 1990 | 41.06 | 38.48 | 46.53 | 52.00 | 52.71 | 59.30 | 67.42 | 66.50 | 64.05 | 50.40 | 44.20 | 32.61 | 51.27 | |||||||||||||
| 1991 | 38.35 | 47.12 | 43.06 | 48.05 | 51.34 | 56.05 | 65.74 | 66.02 | 64.37 | 54.42 | 44.98 | 40.42 | 51.66 | |||||||||||||
| 1992 | 42.24 | 48.52 | 51.58 | 53.15 | 59.42 | 62.77 | 66.35 | 67.39 | 60.07 | 54.71 | 50.73 | 42.03 | 54.91 | |||||||||||||
| 1993 | 37.37 | 40.80 | 49.13 | 50.83 | 59.15 | 59.78 | 60.81 | 64.79 | 62.17 | 55.31 | 38.60 | 38.98 | 51.48 | |||||||||||||
| 1994 | 41.87 | 40.12 | 48.16 | 49.90 | 57.39 | 59.83 | 68.16 | 67.26 | 65.83 | 52.05 | 40.27 | 41.00 | 52.65 | |||||||||||||
| 1995 | 42.98 | 46.41 | 46.50 | 49.80 | 57.66 | 61.72 | 68.66 | 66.19 | 65.78 | 53.35 | 50.82 | 41.92 | 54.32 | |||||||||||||
| 1996 | 40.13 | 41.34 | 46.02 | 50.75 | 52.15 | 59.52 | 69.56 | 67.94 | 59.68 | 52.23 | 44.28 | 41.56 | 52.10 | |||||||||||||
| 1997 | 40.21 | 42.09 | 45.37 | 49.07 | 59.37 | 59.97 | 66.23 | 68.27 | 63.43 | 53.21 | 48.77 | 39.79 | 52.98 | |||||||||||||
| 1998 | 43.02 | 44.71 | 48.03 | 50.32 | 54.37 | 61.77 | 69.21 | 68.60 | 65.70 | 53.76 | 47.47 | 40.23 | 53.93 | |||||||||||||
| 1999 | 41.90 | 42.36 | 44.56 | 48.77 | 54.02 | 60.15 | 66.95 | l | 68.05 | 63.93 | 53.90 | a | 48.57 | 42.71 | 51.72 | |||||||||||
| 2000 | 40.10 | 43.83 | 44.32 | 52.25 | 55.65 | 63.00 | 65.98 | 65.30 | i | 61.57 | 53.15 | 41.15 | 40.10 | 51.01 | ||||||||||||
| 2001 | 40.24 | 41.98 | 46.94 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.05 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.06 | 42.32 | 45.28 | 48.77 | 54.04 | 59.74 | 64.79 | 65.46 | 61.22 | 52.71 | 44.52 | 39.29 | 51.36 | |||||||||||||
| S.D. | 2.81 | 2.82 | 2.34 | 2.44 | 2.39 | 2.34 | 2.21 | 2.36 | 2.65 | 1.91 | 2.99 | 2.73 | 1.25 | |||||||||||||
| SKEW | -0.93 | -0.01 | 0.40 | -0.19 | 0.65 | -0.10 | 0.34 | 0.08 | 0.19 | 0.34 | -0.34 | -0.56 | 1.11 | |||||||||||||
| MAX | 43.02 | 48.52 | 51.58 | 53.52 | 59.42 | 64.37 | 69.56 | 69.97 | 65.95 | 57.97 | 50.82 | 43.16 | 54.91 | |||||||||||||
| MIN | 30.50 | 34.18 | 40.50 | 44.12 | 50.13 | 54.88 | 60.81 | 61.50 | 56.97 | 49.16 | 36.70 | 32.61 | 49.40 | |||||||||||||
| NO YRS | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 39 | 40 | 40 | 40 | 35 | |||||||||||||