| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.80 | t | 63.65 | 42.03 | 40.26 | 48.65 | ||||
| 1961 | 44.13 | 41.86 | 43.39 | 53.93 | 57.61 | 76.50 | 81.23 | 81.19 | 66.43 | 59.74 | 44.87 | 36.58 | 57.29 | |||||||||||||
| 1962 | 38.48 | 42.25 | 42.77 | 57.43 | 54.16 | 70.43 | 78.19 | 74.94 | 74.60 | ----- | z | 47.03 | 42.94 | 56.66 | ||||||||||||
| 1963 | 40.81 | 48.25 | 44.55 | 44.57 | 61.52 | 65.40 | 72.19 | 75.48 | 74.57 | 58.39 | 42.63 | 41.00 | 55.78 | |||||||||||||
| 1964 | 35.55 | 44.76 | 43.06 | 50.76 | a | 56.71 | 64.07 | 76.90 | 76.84 | 69.47 | 66.39 | 41.90 | 35.52 | 55.16 | ||||||||||||
| 1965 | 37.37 | a | 44.54 | 49.39 | 51.07 | 57.81 | 66.80 | 78.48 | 74.10 | 69.03 | 66.87 | 44.83 | 35.90 | 56.35 | ||||||||||||
| 1966 | 36.23 | 40.57 | 47.13 | 58.60 | 66.81 | 66.87 | 74.39 | 79.84 | 72.67 | 62.16 | 45.40 | 38.13 | 57.40 | |||||||||||||
| 1967 | 38.48 | 47.04 | 43.71 | 42.40 | 62.84 | 69.53 | 81.58 | 84.90 | 78.70 | 59.94 | 50.23 | 33.35 | 57.73 | |||||||||||||
| 1968 | 38.10 | 46.96 | a | 50.06 | 53.10 | 59.74 | 70.67 | 82.71 | 72.00 | 73.37 | 59.55 | 42.43 | 32.77 | 56.79 | ||||||||||||
| 1969 | 32.94 | 36.71 | 46.26 | 51.23 | 67.06 | 68.77 | 77.84 | 78.35 | 73.43 | 53.52 | 51.13 | 39.45 | 56.39 | |||||||||||||
| 1970 | 37.55 | 47.00 | 46.74 | 46.83 | 62.55 | 73.17 | 82.06 | 82.35 | 68.60 | 59.65 | 44.27 | 32.90 | 56.97 | |||||||||||||
| 1971 | 37.65 | 42.50 | 42.13 | 48.63 | 57.71 | 65.33 | 80.35 | 82.87 | 68.80 | 55.10 | 43.20 | 32.26 | 54.71 | |||||||||||||
| 1972 | 34.81 | 42.28 | 50.84 | 49.53 | 64.81 | 72.23 | 81.87 | 79.77 | 67.00 | 59.90 | 41.40 | 31.61 | 56.34 | |||||||||||||
| 1973 | 36.29 | 43.75 | 43.45 | 54.27 | 67.13 | 71.90 | 80.94 | 79.13 | 71.93 | 58.00 | 38.83 | 37.42 | 56.92 | |||||||||||||
| 1974 | 33.52 | 40.46 | 44.71 | 48.23 | 60.10 | 75.13 | 76.45 | 79.19 | 80.10 | 63.42 | 45.73 | 36.52 | 56.96 | |||||||||||||
| 1975 | 36.71 | 37.61 | 40.74 | 43.63 | 60.26 | 67.77 | 77.42 | 74.23 | 77.93 | 53.35 | 41.03 | 38.29 | 54.08 | |||||||||||||
| 1976 | 39.61 | 41.28 | 44.06 | 47.50 | 64.77 | 66.43 | 77.26 | 69.61 | 71.93 | 65.13 | 52.17 | 43.19 | 56.91 | |||||||||||||
| 1977 | 38.39 | 49.11 | 41.77 | 58.53 | 51.81 | 74.07 | 77.45 | 80.74 | 67.97 | 60.52 | 42.00 | 37.87 | 56.69 | |||||||||||||
| 1978 | 41.10 | 45.29 | 53.35 | 49.47 | 58.81 | 69.70 | 78.58 | 76.26 | 64.10 | 68.29 | 43.63 | 33.16 | 56.81 | |||||||||||||
| 1979 | 34.84 | 38.43 | 49.52 | 51.37 | 64.45 | 72.00 | 79.61 | 74.71 | 75.73 | 61.74 | 42.93 | 39.94 | 57.11 | |||||||||||||
| 1980 | 38.23 | 44.14 | 43.97 | 54.23 | 59.58 | ----- | z | 80.13 | 76.74 | 72.70 | 63.55 | 46.87 | 41.81 | 56.54 | ||||||||||||
| 1981 | 42.97 | 43.61 | 47.35 | 54.47 | 60.45 | 70.53 | 78.90 | 83.94 | 74.30 | 56.03 | 45.93 | 38.00 | 58.04 | |||||||||||||
| 1982 | 33.52 | 40.04 | 42.81 | 49.63 | 63.90 | 69.10 | 76.35 | 78.87 | 67.47 | 56.16 | 40.63 | 33.42 | 54.33 | |||||||||||||
| 1983 | 37.68 | 38.54 | 42.45 | 46.80 | 63.16 | 65.47 | 71.19 | 77.10 | 69.43 | 60.90 | 38.43 | 33.29 | 53.70 | |||||||||||||
| 1984 | 38.58 | 40.48 | 47.71 | 47.67 | 60.19 | 66.83 | 81.13 | 79.19 | 70.03 | 50.13 | 36.97 | 32.29 | 54.27 | |||||||||||||
| 1985 | 38.35 | 39.32 | 43.65 | 57.67 | 61.84 | 73.83 | 83.19 | 75.87 | 64.67 | 58.48 | 36.50 | 37.84 | 55.93 | |||||||||||||
| 1986 | 41.16 | 42.25 | 53.00 | 53.70 | 62.29 | 76.33 | 75.90 | 84.74 | 64.03 | 62.13 | 46.07 | 37.13 | 58.23 | |||||||||||||
| 1987 | 34.39 | 41.39 | 44.55 | 63.30 | 65.68 | 75.83 | a | 74.07 | a | 81.16 | 76.55 | a | 71.19 | 44.87 | 33.55 | 58.88 | ||||||||||
| 1988 | 35.68 | 47.59 | 49.10 | 56.90 | 59.23 | 68.30 | 83.03 | 82.93 | a | 75.60 | 72.29 | 40.07 | 36.68 | 58.95 | ||||||||||||
| 1989 | 33.94 | 35.21 | 43.19 | 58.50 | 59.52 | 73.20 | 77.19 | 74.90 | 71.70 | 57.87 | 47.07 | 42.32 | 56.22 | |||||||||||||
| 1990 | 36.97 | b | 39.46 | 50.06 | 61.47 | 58.68 | 69.87 | 81.55 | 78.42 | 76.40 | 60.10 | 41.87 | 30.58 | 57.12 | ||||||||||||
| 1991 | 39.61 | 48.89 | 41.45 | 48.30 | 55.13 | 65.53 | 80.68 | ----- | z | 81.20 | 66.26 | 44.90 | 36.48 | 55.31 | ||||||||||||
| 1992 | 38.23 | 46.03 | 53.13 | 57.90 | 72.61 | 73.69 | d | 77.84 | 83.94 | 74.90 | 64.10 | 42.27 | 32.86 | j | 62.24 | |||||||||||
| 1993 | 32.45 | 37.29 | 48.16 | 48.83 | 62.84 | 66.73 | 72.42 | 77.35 | 75.80 | 61.68 | 43.30 | 35.94 | 55.23 | |||||||||||||
| 1994 | 38.71 | 38.25 | 53.06 | 56.30 | 63.77 | 70.87 | 84.61 | 80.74 | 76.17 | 58.90 | 33.47 | 34.29 | 57.43 | |||||||||||||
| 1995 | 36.97 | 48.79 | 44.00 | 49.67 | 61.23 | 66.20 | 76.29 | 77.32 | 75.90 | 61.90 | 49.70 | 38.06 | 57.17 | |||||||||||||
| 1996 | 35.94 | 41.24 | 48.55 | 54.23 | 59.48 | 70.93 | 83.90 | 82.84 | 70.47 | 58.19 | 44.50 | 35.29 | 57.13 | |||||||||||||
| 1997 | 36.29 | 40.82 | 49.39 | 51.13 | 68.23 | 67.53 | 77.16 | 79.71 | 71.20 | 56.71 | 43.87 | 34.35 | 56.37 | |||||||||||||
| 1998 | 37.00 | 36.32 | 45.13 | 50.73 | 50.45 | 68.63 | 82.45 | 83.00 | 76.93 | 56.90 | 38.27 | 32.52 | 54.86 | |||||||||||||
| 1999 | 36.58 | 35.54 | 42.35 | 49.27 | 59.52 | 68.80 | 79.00 | 76.90 | 76.23 | 66.11 | c | 46.70 | 37.03 | 56.17 | ||||||||||||
| 2000 | 35.42 | 40.34 | 44.45 | 57.33 | 60.94 | 74.23 | 77.13 | 81.84 | 71.47 | 57.35 | 39.20 | 38.71 | 56.53 | |||||||||||||
| 2001 | 37.06 | 37.93 | 48.03 | 49.10 | 70.81 | 69.57 | 79.87 | 82.97 | 75.23 | 63.81 | 43.87 | 34.35 | 57.72 | |||||||||||||
| 2002 | 34.23 | 42.57 | 44.52 | 55.43 | 60.90 | 73.57 | 84.68 | 79.97 | 76.13 | 61.39 | 47.43 | 38.06 | 58.24 | |||||||||||||
| 2003 | 41.26 | 40.39 | 46.45 | 45.70 | 61.26 | 75.67 | i | 86.00 | 80.42 | 76.17 | 65.29 | 38.90 | 36.26 | 56.19 | ||||||||||||
| 2004 | 36.13 | 39.17 | 52.55 | 56.93 | 60.35 | 71.67 | 81.84 | f | 79.33 | j | 69.07 | 56.77 | 44.23 | 38.90 | 52.58 | |||||||||||
| 2005 | 37.65 | 44.82 | 49.65 | 50.33 | 59.84 | 63.53 | 81.81 | 83.58 | 72.30 | 60.10 | 45.00 | 37.35 | 57.16 | |||||||||||||
| 2006 | 36.90 | 42.29 | 38.90 | 50.23 | 64.68 | 71.87 | 84.13 | 79.81 | 70.57 | 59.06 | ----- | z | 37.06 | 57.77 | ||||||||||||
| 2007 | 37.26 | 43.00 | 51.52 | 53.87 | 66.35 | 71.70 | 81.68 | 79.81 | 70.77 | 53.13 | 46.53 | 33.65 | 57.44 | |||||||||||||
| 2008 | 33.97 | 41.55 | 45.23 | 49.53 | 60.52 | 68.83 | 82.10 | 81.26 | 75.83 | 59.13 | 46.27 | 36.32 | 56.71 | |||||||||||||
| 2009 | 39.52 | 41.25 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.38 | |||
| 2010 | ----- | z | ----- | z | 44.87 | 44.97 | 51.52 | 63.83 | 79.19 | 76.39 | 69.00 | 59.55 | 40.43 | 35.32 | 56.51 | |||||||||||
| 2011 | 38.32 | 37.21 | 39.61 | 43.57 | 51.90 | 62.50 | 72.29 | 78.35 | 75.53 | 56.19 | 38.87 | 40.23 | 52.88 | |||||||||||||
| 2012 | 38.29 | 38.72 | 39.71 | 50.83 | a | 59.97 | 63.97 | 75.84 | 81.77 | 77.03 | 59.10 | 44.33 | 35.26 | 55.40 | ||||||||||||
| 2013 | 35.45 | 39.50 | 46.90 | 44.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.00 | z | 40.62 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.25 | 41.82 | 46.02 | 51.76 | 61.05 | 69.60 | 79.14 | 79.15 | 72.69 | 60.50 | 43.43 | 36.50 | 56.48 | |||||||||||||
| S.D. | 2.46 | 3.64 | 3.81 | 4.81 | 4.60 | 3.64 | 3.51 | 3.43 | 4.09 | 4.47 | 3.77 | 3.04 | 1.36 | |||||||||||||
| SKEW | 0.42 | 0.32 | 0.29 | 0.23 | -0.08 | 0.02 | -0.30 | -0.45 | -0.24 | 0.37 | -0.11 | 0.27 | -0.64 | |||||||||||||
| MAX | 44.13 | 49.11 | 53.35 | 63.30 | 72.61 | 76.50 | 86.00 | 84.90 | 81.20 | 72.29 | 52.17 | 43.19 | 58.95 | |||||||||||||
| MIN | 32.45 | 35.21 | 38.90 | 42.40 | 50.45 | 62.50 | 71.19 | 69.61 | 64.03 | 50.13 | 33.47 | 30.58 | 52.88 | |||||||||||||
| NO YRS | 52 | 52 | 52 | 51 | 51 | 49 | 50 | 49 | 51 | 51 | 51 | 51 | 43 | |||||||||||||