| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.88 | n | 87.71 | 81.76 | a | 66.45 | 48.03 | 39.29 | 64.65 | |||||
| 1949 | 24.39 | 36.43 | 49.74 | 66.03 | 70.13 | 79.47 | 89.00 | 87.55 | 82.13 | 62.42 | 63.57 | 41.87 | 62.73 | |||||||||||||
| 1950 | 38.97 | 49.75 | 55.06 | 65.60 | 70.84 | 82.50 | 87.55 | 88.42 | 78.10 | 74.03 | 58.90 | 50.84 | 66.71 | |||||||||||||
| 1951 | 41.53 | a | 47.18 | 51.45 | 62.40 | 70.32 | 81.80 | 91.16 | 84.87 | 83.40 | 64.16 | 50.07 | 38.32 | 63.89 | ||||||||||||
| 1952 | 38.61 | 44.03 | 44.13 | 62.33 | 74.45 | 81.40 | 88.42 | 89.55 | 82.20 | 77.10 | 47.80 | 43.00 | 64.42 | |||||||||||||
| 1953 | 51.06 | 46.75 | 56.45 | 61.50 | 64.23 | 83.50 | 90.16 | 85.87 | 84.53 | 65.81 | 56.80 | 39.74 | 65.53 | |||||||||||||
| 1954 | 44.65 | 50.29 | 50.42 | 69.17 | 76.71 | 81.00 | 90.23 | 86.32 | 79.67 | 69.97 | 57.13 | 43.19 | 66.56 | |||||||||||||
| 1955 | 36.87 | 36.82 | 51.77 | 59.47 | 70.26 | 81.43 | 87.52 | 85.94 | 81.63 | 71.39 | 52.97 | 48.32 | 63.70 | |||||||||||||
| 1956 | 48.81 | 40.83 | 56.58 | 61.17 | 73.87 | 86.77 | 88.19 | 86.16 | 85.03 | 67.32 | 51.50 | 45.23 | 65.95 | |||||||||||||
| 1957 | 38.48 | 50.68 | 53.55 | 57.83 | 65.94 | 84.00 | 88.50 | a | 85.45 | 81.13 | 61.84 | 43.83 | 49.23 | 63.37 | ||||||||||||
| 1958 | 43.26 | 51.07 | 45.90 | 59.37 | 77.55 | 85.07 | 89.68 | 91.26 | 78.53 | 70.42 | 52.90 | 54.42 | 66.62 | |||||||||||||
| 1959 | 47.23 | 42.96 | 56.06 | 67.43 | 70.23 | 87.07 | 93.10 | 86.87 | 76.13 | 69.32 | 55.73 | 45.06 | 66.43 | |||||||||||||
| 1960 | 37.23 | 41.69 | 58.23 | a | 64.40 | 73.87 | 87.70 | 93.52 | 89.87 | 82.73 | 64.77 | 53.77 | 41.90 | 65.81 | ||||||||||||
| 1961 | 46.58 | 48.50 | 51.10 | 62.33 | 72.61 | 88.67 | 91.16 | 85.58 | 73.30 | 65.35 | 48.97 | 41.10 | 64.60 | |||||||||||||
| 1962 | 38.39 | 44.54 | 46.87 | 68.43 | 68.23 | 81.57 | 87.65 | 88.84 | 82.30 | 67.77 | 57.87 | 47.39 | 64.99 | |||||||||||||
| 1963 | 38.42 | 53.00 | 52.29 | 57.33 | 76.00 | 78.10 | 90.77 | 84.68 | 81.67 | 70.52 | 52.17 | 43.55 | 64.87 | |||||||||||||
| 1964 | 40.84 | 42.21 | 46.29 | 56.70 | 68.55 | 79.43 | 90.55 | 85.45 | 77.27 | 73.58 | 47.90 | 42.61 | 62.61 | |||||||||||||
| 1965 | 44.06 | 42.96 | 50.10 | 58.83 | 66.74 | 76.77 | 86.35 | 86.71 | 72.87 | 73.35 | 55.07 | 42.26 | 63.01 | |||||||||||||
| 1966 | 41.00 | 40.57 | 57.42 | 65.20 | 77.10 | 83.87 | 90.39 | 89.58 | 81.43 | 67.35 | 57.17 | 41.03 | 66.01 | |||||||||||||
| 1967 | 40.52 | 50.32 | 57.45 | 54.83 | 70.03 | 77.20 | 89.29 | 88.87 | 77.37 | 69.90 | 57.47 | 32.94 | 63.85 | |||||||||||||
| 1968 | 38.39 | 51.62 | 55.58 | 57.47 | 71.58 | 84.50 | 86.42 | 79.00 | 76.63 | 65.13 | 51.17 | 39.48 | 63.08 | |||||||||||||
| 1969 | 45.81 | 41.96 | 47.23 | 62.47 | 75.39 | 78.27 | 88.03 | 89.84 | 81.23 | 60.00 | 52.87 | 46.81 | 64.16 | |||||||||||||
| 1970 | 44.90 | 52.54 | 51.10 | 56.80 | 74.90 | 83.03 | 88.61 | 88.16 | 76.77 | 64.61 | 55.50 | 44.42 | 65.11 | |||||||||||||
| 1971 | 45.68 | 45.68 | 52.81 | 61.00 | 64.29 | 82.00 | 90.39 | 85.16 | 76.80 | 61.90 | 49.03 | 37.65 | 62.70 | |||||||||||||
| 1972 | 46.23 | 55.62 | 64.42 | 63.90 | 75.16 | 82.73 | 91.87 | 84.71 | 74.03 | 58.00 | 43.10 | 34.48 | 64.52 | |||||||||||||
| 1973 | 31.45 | 41.79 | 43.65 | 54.60 | 70.35 | 81.80 | 91.13 | 89.58 | 78.67 | 67.06 | 50.63 | 42.42 | 61.93 | |||||||||||||
| 1974 | 35.71 | 42.96 | 56.97 | 59.83 | 75.74 | 88.53 | 89.00 | 89.23 | 82.93 | 66.77 | 54.83 | 42.77 | 65.44 | |||||||||||||
| 1975 | 42.35 | 44.21 | 49.29 | 53.43 | 68.45 | 82.43 | 91.23 | 88.90 | 82.63 | 69.03 | 54.00 | 46.26 | 64.35 | |||||||||||||
| 1976 | 47.42 | 51.52 | 53.61 | 63.27 | 78.87 | 86.23 | 92.90 | 89.71 | 81.03 | 68.32 | 59.77 | 51.32 | 68.66 | |||||||||||||
| 1977 | 44.61 | 54.50 | 50.77 | 68.07 | 67.10 | 86.90 | 89.39 | 88.61 | 80.10 | 72.26 | 58.33 | 51.90 | 67.71 | |||||||||||||
| 1978 | 43.97 | 48.25 | 58.39 | 60.80 | 69.03 | 85.63 | 92.16 | 89.10 | 77.53 | 71.23 | 47.17 | 37.74 | 65.08 | |||||||||||||
| 1979 | 34.10 | 41.68 | 51.94 | 62.63 | 71.90 | 85.00 | 92.71 | 86.65 | 86.97 | 72.26 | 49.70 | 49.00 | 65.38 | |||||||||||||
| 1980 | 44.16 | 50.76 | 49.10 | 62.97 | 67.23 | 85.07 | 92.39 | 88.74 | 79.97 | 66.94 | 56.20 | 53.42 | 66.41 | |||||||||||||
| 1981 | 46.90 | 53.39 | 52.58 | 67.03 | 71.35 | 88.97 | 94.06 | 90.29 | 81.17 | 62.84 | 57.47 | 52.68 | 68.23 | |||||||||||||
| 1982 | 40.16 | 46.82 | 52.90 | 62.17 | 71.52 | 82.33 | 88.10 | 87.39 | 76.80 | 64.10 | 51.23 | 39.03 | 63.55 | |||||||||||||
| 1983 | 46.94 | 50.46 | 53.03 | 55.73 | 69.87 | 81.63 | 89.26 | 85.87 | 81.93 | 68.19 | 51.90 | 44.42 | 64.94 | |||||||||||||
| 1984 | 38.52 | 45.31 | 53.10 | 58.03 | 80.87 | 84.07 | 90.61 | 88.26 | 82.03 | 59.10 | 52.97 | 40.00 | 64.41 | |||||||||||||
| 1985 | 39.23 | 44.29 | 52.32 | 67.43 | 74.74 | 88.23 | 91.32 | 89.84 | 74.33 | 64.84 | 46.90 | 41.39 | 64.57 | |||||||||||||
| 1986 | 51.39 | 49.54 | 58.52 | 61.00 | 73.16 | 86.70 | 86.81 | 87.68 | 70.77 | 61.77 | 51.90 | 44.48 | 65.31 | |||||||||||||
| 1987 | 38.35 | 44.93 | 49.58 | 67.20 | 71.39 | 86.63 | 86.84 | 86.58 | 81.07 | 69.52 | 49.37 | 38.29 | 64.15 | |||||||||||||
| 1988 | 37.94 | 47.10 | 52.16 | 61.67 | 69.77 | 85.97 | 92.35 | 87.29 | 78.57 | 75.48 | 52.03 | 40.19 | 65.04 | |||||||||||||
| 1989 | 34.71 | 41.11 | 60.61 | 70.27 | 73.10 | 83.33 | 93.13 | 85.87 | 80.53 | 66.58 | 56.00 | 47.06 | 66.03 | |||||||||||||
| 1990 | 44.13 | 41.04 | 56.10 | 64.80 | 70.90 | 86.07 | 90.00 | 86.06 | 80.43 | 68.23 | 53.00 | 34.71 | 64.62 | |||||||||||||
| 1991 | 38.35 | 51.07 | 48.45 | 59.73 | 67.32 | 80.23 | 89.84 | 87.81 | 79.50 | 68.32 | 48.43 | 41.48 | 63.38 | |||||||||||||
| 1992 | 42.19 | 49.10 | 53.87 | 68.90 | 73.26 | 82.13 | 86.77 | 87.42 | 80.67 | 70.03 | 48.00 | 38.03 | 65.03 | |||||||||||||
| 1993 | 41.16 | 41.54 | 57.16 | 62.50 | 74.13 | 79.77 | 87.77 | 87.29 | 81.50 | 65.81 | 50.33 | 43.77 | 64.39 | |||||||||||||
| 1994 | 49.42 | 45.21 | 59.61 | 62.80 | 74.06 | 89.47 | 93.35 | 90.94 | 82.00 | 64.74 | 43.40 | 42.26 | 66.44 | |||||||||||||
| 1995 | 43.03 | 58.89 | 53.74 | 58.47 | 65.84 | 76.73 | 89.52 | 90.03 | 82.73 | 70.90 | 62.87 | 47.81 | 66.71 | |||||||||||||
| 1996 | 47.26 | 53.00 | 57.81 | 64.70 | 76.19 | 88.17 | 92.61 | 90.84 | 78.23 | 64.84 | 53.57 | 46.00 | 67.77 | |||||||||||||
| 1997 | 40.81 | 45.25 | 62.71 | 58.57 | 77.77 | 82.30 | 89.39 | 88.39 | 79.03 | 68.42 | 56.60 | 42.81 | 66.00 | |||||||||||||
| 1998 | 48.61 | 45.11 | 55.16 | 58.50 | 69.45 | 77.70 | 89.97 | 89.29 | 77.73 | 62.48 | 51.93 | 41.29 | 63.94 | |||||||||||||
| 1999 | 47.55 | 49.18 | 59.29 | 55.13 | 70.94 | 81.87 | 86.55 | 85.55 | 78.53 | 72.39 | 62.07 | 44.06 | 66.09 | |||||||||||||
| 2000 | 45.42 | 47.31 | 54.19 | 68.40 | 77.61 | 85.47 | 90.35 | 87.19 | 80.63 | 62.32 | 40.63 | 45.77 | 65.44 | |||||||||||||
| 2001 | 39.26 | 43.46 | 55.58 | 61.23 | 77.61 | 86.07 | 89.35 | 89.00 | 83.30 | 70.65 | 53.70 | 37.39 | 65.55 | |||||||||||||
| 2002 | 41.16 | 49.25 | 52.71 | 67.20 | 74.29 | 87.60 | 93.26 | 88.81 | 77.10 | 62.13 | 51.27 | 41.94 | 65.56 | |||||||||||||
| 2003 | 52.58 | 43.25 | 53.65 | 58.97 | 74.03 | 84.57 | 94.90 | 88.48 | 81.63 | 74.74 | 48.83 | 42.84 | 66.54 | |||||||||||||
| 2004 | 37.68 | 40.31 | 64.10 | 63.03 | 75.03 | 85.00 | 89.13 | 85.65 | 77.50 | 62.23 | 46.80 | 42.74 | 64.10 | |||||||||||||
| 2005 | 45.10 | 45.25 | 52.77 | 60.10 | 71.32 | 78.17 | 92.16 | 84.74 | 79.57 | 66.94 | 55.60 | 46.19 | 64.83 | |||||||||||||
| 2006 | 44.68 | 49.93 | 48.16 | 64.00 | 77.32 | 88.03 | 90.25 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.02 | |||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.21 | 46.63 | 53.54 | 61.99 | 72.25 | 83.56 | 90.12 | 87.58 | 79.76 | 67.31 | 52.56 | 43.37 | 65.07 | |||||||||||||
| S.D. | 5.17 | 4.75 | 4.56 | 4.15 | 3.83 | 3.42 | 2.17 | 2.12 | 3.12 | 4.27 | 4.84 | 4.69 | 1.44 | |||||||||||||
| SKEW | -0.57 | 0.16 | 0.15 | 0.04 | -0.06 | -0.24 | 0.14 | -1.03 | -0.56 | 0.06 | -0.03 | 0.29 | 0.19 | |||||||||||||
| MAX | 52.58 | 58.89 | 64.42 | 70.27 | 80.87 | 89.47 | 94.90 | 91.26 | 86.97 | 77.10 | 63.57 | 54.42 | 68.66 | |||||||||||||
| MIN | 24.39 | 36.43 | 43.65 | 53.43 | 64.23 | 76.73 | 86.35 | 79.00 | 70.77 | 58.00 | 40.63 | 32.94 | 61.93 | |||||||||||||
| NO YRS | 58 | 58 | 58 | 58 | 58 | 58 | 57 | 58 | 58 | 58 | 58 | 58 | 57 | |||||||||||||