| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1953 | ----- | z | 48.09 | e | 52.68 | 59.03 | 62.79 | b | 70.23 | 86.84 | 81.45 | 84.97 | 63.47 | a | 52.48 | a | 41.55 | b | 63.96 | |||||||
| 1954 | 40.45 | 50.36 | 53.84 | 63.20 | 73.87 | a | 69.97 | 83.52 | 76.61 | 73.97 | 63.87 | 52.00 | 41.45 | 61.92 | ||||||||||||
| 1955 | 38.81 | 43.22 | a | 49.06 | 50.87 | 66.03 | 78.83 | 80.48 | 88.43 | a | 77.77 | 63.37 | a | 45.72 | a | 42.60 | a | 60.43 | ||||||||
| 1956 | 41.48 | b | 40.93 | 50.10 | 63.52 | a | 71.90 | 74.55 | a | 88.42 | 84.06 | 80.73 | 60.16 | 51.64 | b | 42.55 | 62.50 | |||||||||
| 1957 | 37.48 | 49.32 | 51.32 | 62.46 | b | 69.71 | 79.00 | a | 83.16 | 81.47 | a | 84.53 | 59.48 | 48.43 | b | 42.16 | 62.38 | |||||||||
| 1958 | 43.97 | a | 52.04 | 52.13 | a | 58.55 | a | 78.35 | 74.87 | 89.71 | 90.58 | 76.83 | 70.39 | 51.17 | 48.74 | 65.61 | ||||||||||
| 1959 | 46.00 | b | 45.93 | 54.77 | 66.45 | a | 66.52 | 76.90 | 90.32 | 85.19 | 73.43 | 66.19 | 54.23 | 43.87 | 64.15 | |||||||||||
| 1960 | 41.45 | 47.62 | 56.65 | 59.87 | 64.94 | 83.17 | 91.48 | 83.94 | 84.13 | 66.81 | 50.26 | c | 43.42 | 64.48 | ||||||||||||
| 1961 | 49.06 | 48.79 | 50.26 | 63.70 | 67.81 | 84.87 | 90.00 | 92.16 | 76.80 | 64.13 | 48.90 | 41.71 | 64.85 | |||||||||||||
| 1962 | 42.06 | 47.04 | 51.42 | 67.80 | 62.77 | 78.33 | 87.90 | 83.19 | 82.27 | ----- | z | 52.67 | 47.76 | b | 63.93 | |||||||||||
| 1963 | 43.43 | a | 55.32 | 54.00 | 53.60 | 70.29 | 72.87 | 80.23 | 83.52 | 81.57 | 62.68 | 48.50 | 44.97 | 62.58 | ||||||||||||
| 1964 | 40.55 | 48.72 | 50.06 | 58.53 | 67.00 | 73.50 | 84.81 | 83.90 | 76.90 | 69.71 | 45.20 | 40.45 | 61.61 | |||||||||||||
| 1965 | 41.06 | 50.21 | 59.87 | 61.57 | 67.48 | 76.93 | 88.74 | 83.19 | 77.23 | 68.97 | 51.57 | 40.47 | a | 63.94 | ||||||||||||
| 1966 | 40.32 | 45.79 | 53.80 | a | 68.53 | 75.23 | 76.87 | 82.97 | 86.42 | 78.73 | 65.16 | 50.53 | 42.90 | 63.94 | ||||||||||||
| 1967 | 42.58 | 51.93 | 50.70 | a | 51.77 | 72.61 | 81.50 | 89.55 | 95.77 | 86.50 | 61.71 | 53.10 | 39.94 | 64.80 | ||||||||||||
| 1968 | 42.81 | 56.34 | 59.61 | 63.10 | 69.81 | 79.93 | 89.45 | 80.65 | 78.73 | 61.94 | 48.57 | 40.26 | 64.27 | |||||||||||||
| 1969 | 38.58 | 45.36 | 57.32 | 61.73 | 76.90 | 78.30 | 85.26 | 87.16 | 79.97 | 59.06 | 52.27 | 44.90 | 63.90 | |||||||||||||
| 1970 | 43.71 | 53.68 | 55.19 | 54.80 | 73.71 | 83.50 | 90.16 | 90.19 | 75.43 | 64.71 | 50.90 | 39.23 | 64.60 | |||||||||||||
| 1971 | 40.10 | 45.43 | 47.45 | 59.37 | 68.45 | 74.50 | 88.45 | 91.13 | 74.83 | 59.68 | 47.53 | 38.90 | 61.32 | |||||||||||||
| 1972 | 39.26 | 48.45 | 57.19 | 59.43 | 74.23 | 81.23 | 91.74 | 89.23 | 75.40 | 64.23 | 48.20 | 38.23 | 63.90 | |||||||||||||
| 1973 | 41.13 | 52.96 | 50.97 | 63.68 | b | 76.42 | 79.13 | 89.06 | 86.45 | 79.23 | 60.42 | 42.60 | 43.90 | 63.83 | ||||||||||||
| 1974 | 40.48 | 45.07 | 53.06 | 60.07 | 67.00 | 83.87 | 85.42 | 88.32 | 89.27 | 69.61 | 50.37 | 42.65 | 64.60 | |||||||||||||
| 1975 | 40.65 | 44.93 | 49.68 | 54.30 | 71.06 | 76.87 | 86.13 | 82.16 | 85.37 | 60.29 | 45.60 | 43.45 | 61.71 | |||||||||||||
| 1976 | 43.48 | 46.55 | 52.10 | 58.70 | 74.32 | 75.00 | 85.97 | 78.29 | 78.70 | 65.97 | 54.40 | 42.19 | 62.97 | |||||||||||||
| 1977 | 43.36 | c | 54.25 | 50.61 | 68.63 | 61.71 | 83.50 | 86.16 | 89.48 | 72.90 | 62.42 | 46.90 | 46.26 | 63.85 | ||||||||||||
| 1978 | 47.42 | 49.89 | 61.61 | 58.73 | 67.42 | 80.33 | 86.74 | 82.87 | 68.33 | 68.13 | 46.40 | 39.13 | 63.08 | |||||||||||||
| 1979 | 41.35 | 43.57 | 58.19 | 59.13 | 74.00 | 80.63 | 86.81 | 81.23 | 81.27 | 66.84 | 48.20 | 44.94 | 63.85 | |||||||||||||
| 1980 | 42.87 | 50.69 | 51.55 | 64.60 | 68.13 | 71.50 | 87.48 | 83.84 | 80.03 | 65.65 | 50.23 | 44.87 | 63.45 | |||||||||||||
| 1981 | 48.13 | 49.79 | 55.84 | 63.23 | 67.68 | 76.27 | 86.32 | 90.90 | 79.43 | 58.13 | 50.13 | 43.81 | 64.14 | |||||||||||||
| 1982 | 39.06 | 46.14 | 51.97 | 58.83 | 73.03 | 78.20 | 83.81 | 85.81 | 72.80 | 60.81 | 46.30 | 41.61 | 61.53 | |||||||||||||
| 1983 | 45.39 | 49.71 | 52.23 | 59.30 | 73.58 | 74.80 | 78.23 | 83.19 | 75.67 | 61.77 | 46.87 | 40.45 | 61.77 | |||||||||||||
| 1984 | 44.65 | 47.66 | 54.29 | 54.13 | 66.68 | 72.57 | 88.23 | 83.90 | 73.23 | 55.42 | 44.53 | 38.26 | 60.30 | |||||||||||||
| 1985 | 43.19 | 45.14 | 50.68 | 65.47 | ----- | z | 79.83 | 89.74 | 83.13 | 67.07 | 60.00 | 40.93 | 41.19 | 60.58 | ||||||||||||
| 1986 | 47.77 | 48.04 | 59.10 | 59.30 | 70.55 | 81.93 | 79.87 | 90.74 | 66.60 | 62.42 | 47.70 | 41.39 | 62.95 | |||||||||||||
| 1987 | 40.16 | 48.54 | 54.77 | 68.50 | 70.90 | 83.40 | 78.32 | 86.32 | 78.60 | 72.13 | 47.90 | 40.39 | 64.16 | |||||||||||||
| 1988 | 39.90 | 50.21 | 54.77 | 61.30 | 66.00 | 74.13 | 87.23 | 86.68 | 78.00 | 67.55 | 44.37 | 40.97 | 62.59 | |||||||||||||
| 1989 | 39.23 | 41.46 | 49.26 | 65.47 | 66.61 | 78.57 | 78.65 | 79.84 | 74.63 | 58.42 | 47.17 | 41.94 | 60.10 | |||||||||||||
| 1990 | 41.87 | 42.00 | 54.77 | 66.03 | 65.13 | 75.00 | 87.10 | 82.39 | 77.87 | 57.61 | 45.77 | 35.84 | 60.95 | |||||||||||||
| 1991 | 40.94 | 52.75 | 49.32 | 54.43 | 62.03 | 71.40 | 86.55 | 85.48 | 83.13 | 65.26 | 48.73 | 42.23 | 61.85 | |||||||||||||
| 1992 | 43.97 | 51.72 | 59.97 | 63.17 | 79.06 | 79.17 | 83.74 | 88.06 | 76.53 | 61.10 | 45.23 | 36.97 | 64.06 | |||||||||||||
| 1993 | 36.74 | 42.54 | 53.77 | 55.07 | 69.35 | 72.47 | 75.32 | 81.13 | 81.13 | 66.03 | 45.93 | 43.10 | 60.22 | |||||||||||||
| 1994 | 45.81 | 44.68 | 58.16 | 62.33 | 71.48 | 75.93 | 87.03 | 81.90 | 78.60 | 59.03 | 38.93 | 38.23 | 61.84 | |||||||||||||
| 1995 | 46.84 | 51.96 | 51.55 | 57.00 | 68.42 | 72.83 | 82.29 | 80.87 | 78.07 | 58.71 | 50.87 | 44.00 | 61.95 | |||||||||||||
| 1996 | 40.68 | 46.03 | 54.71 | 60.20 | 64.68 | 75.93 | 88.74 | 86.06 | 71.83 | 58.55 | 48.40 | 40.52 | 61.36 | |||||||||||||
| 1997 | 41.61 | 47.00 | 53.58 | 58.37 | 74.74 | 72.60 | 82.65 | 83.52 | 72.20 | 56.74 | 49.87 | 39.03 | 60.99 | |||||||||||||
| 1998 | 44.65 | 47.57 | 52.45 | 60.40 | 60.16 | 75.40 | 86.42 | 86.84 | 79.93 | 58.00 | 46.27 | 36.84 | 61.24 | |||||||||||||
| 1999 | 39.71 | 41.43 | 48.23 | 58.03 | 64.10 | 73.67 | 82.87 | 79.87 | 78.93 | 64.29 | 51.23 | 40.32 | 60.22 | |||||||||||||
| 2000 | 39.68 | 47.24 | 50.84 | 64.23 | 65.87 | 79.80 | 80.94 | 84.19 | 74.77 | 60.32 | 42.53 | 40.84 | 60.94 | |||||||||||||
| 2001 | 42.71 | 46.21 | 54.74 | 56.43 | 76.58 | 72.73 | 81.77 | 85.16 | 79.77 | 61.65 | 47.43 | 38.61 | 61.98 | |||||||||||||
| 2002 | 39.19 | 45.82 | 51.52 | 62.03 | 68.55 | 77.40 | 87.03 | 83.71 | 75.93 | 60.65 | 49.80 | 41.48 | 61.93 | |||||||||||||
| 2003 | 46.39 | 46.50 | 52.19 | 53.53 | 68.71 | 81.57 | 88.84 | 84.23 | 77.83 | 62.71 | 43.10 | 41.87 | 62.29 | |||||||||||||
| 2004 | 41.06 | 47.69 | 60.10 | 66.17 | 66.71 | 77.33 | 86.26 | 83.77 | 70.80 | 59.48 | 46.47 | 42.23 | 62.34 | |||||||||||||
| 2005 | 42.13 | 50.25 | 55.61 | 58.47 | 67.71 | 71.20 | 86.55 | 87.03 | 71.13 | 59.39 | 43.87 | 39.32 | 61.05 | |||||||||||||
| 2006 | 41.00 | 47.46 | 46.90 | 61.13 | 72.19 | 77.40 | 86.00 | 84.26 | 76.50 | 60.32 | ----- | z | 39.42 | 62.96 | ||||||||||||
| 2007 | 36.74 | 44.04 | 55.42 | 60.93 | 71.71 | 74.47 | 84.10 | 80.68 | 73.30 | 56.55 | 46.60 | 37.94 | 60.21 | |||||||||||||
| 2008 | 35.97 | 42.17 | 45.90 | 55.27 | 68.90 | 74.97 | 85.29 | 84.13 | 78.87 | 58.61 | 48.13 | 36.45 | 59.56 | |||||||||||||
| 2009 | 37.87 | 44.82 | 47.61 | 58.30 | 72.35 | 75.53 | 89.45 | 84.32 | 76.87 | 55.26 | 43.90 | 35.97 | 60.19 | |||||||||||||
| 2010 | 45.94 | 48.71 | 51.68 | 55.90 | 61.13 | 71.53 | 86.13 | 83.58 | 71.53 | 58.87 | 44.33 | 41.23 | 60.05 | |||||||||||||
| 2011 | 40.26 | 42.61 | 48.35 | 53.10 | 61.00 | 72.43 | 79.87 | 84.29 | 80.70 | 58.03 | 44.60 | 37.16 | 58.53 | |||||||||||||
| 2012 | 39.71 | 44.38 | 46.00 | 59.33 | 68.87 | 70.80 | 82.03 | 86.90 | 80.20 | 59.97 | a | 46.63 | 37.71 | 60.21 | ||||||||||||
| 2013 | 36.94 | 43.57 | 54.32 | 54.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.00 | z | 44.94 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.83 | 47.51 | 53.05 | 60.19 | 69.24 | 76.70 | 85.57 | 84.90 | 77.47 | 62.18 | 47.85 | 41.18 | 62.32 | |||||||||||||
| S.D. | 3.03 | 3.60 | 3.69 | 4.35 | 4.53 | 3.89 | 3.66 | 3.60 | 4.59 | 3.95 | 3.30 | 2.78 | 1.65 | |||||||||||||
| SKEW | 0.40 | 0.29 | 0.28 | 0.00 | 0.07 | 0.25 | -0.65 | 0.52 | -0.04 | 0.52 | -0.21 | 0.27 | -0.03 | |||||||||||||
| MAX | 49.06 | 56.34 | 61.61 | 68.63 | 79.06 | 84.87 | 91.74 | 95.77 | 89.27 | 72.13 | 54.40 | 48.74 | 65.61 | |||||||||||||
| MIN | 35.97 | 40.93 | 45.90 | 50.87 | 60.16 | 69.97 | 75.32 | 76.61 | 66.60 | 55.26 | 38.93 | 35.84 | 58.53 | |||||||||||||
| NO YRS | 60 | 61 | 61 | 60 | 59 | 60 | 60 | 60 | 60 | 59 | 59 | 60 | 56 | |||||||||||||