| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.13 | a | 46.87 | 40.26 | 48.75 | |||
| 1977 | 32.55 | 45.57 | 39.81 | 60.00 | 56.16 | 73.87 | 77.74 | 80.29 | 63.67 | 55.66 | b | 40.00 | 35.81 | 55.09 | ||||||||||||
| 1978 | 37.32 | 40.21 | 51.00 | 52.43 | 56.58 | 70.07 | 76.16 | 74.39 | 65.60 | 61.61 | 37.70 | 28.26 | 54.28 | |||||||||||||
| 1979 | 24.13 | 36.32 | 47.61 | 50.83 | 63.19 | 72.03 | 80.90 | 80.00 | 75.33 | 59.48 | 39.77 | 40.26 | 55.82 | |||||||||||||
| 1980 | 31.20 | a | 40.17 | 42.19 | 58.27 | 59.41 | b | 64.33 | 76.35 | 73.84 | 70.63 | 60.00 | 43.73 | 41.87 | 55.17 | |||||||||||
| 1981 | 40.71 | 41.18 | 49.90 | 53.90 | a | 57.97 | 65.10 | 76.42 | 83.94 | 72.37 | 53.90 | a | 46.10 | 35.94 | 56.45 | |||||||||||
| 1982 | 31.87 | 34.79 | 43.42 | 48.90 | 60.32 | 69.87 | 74.84 | 78.87 | 68.00 | 54.42 | 38.30 | 33.61 | 53.10 | |||||||||||||
| 1983 | 40.26 | 43.46 | 48.35 | 51.97 | 63.23 | 67.47 | 73.00 | 81.68 | 65.30 | 58.13 | 42.73 | 26.00 | 55.13 | |||||||||||||
| 1984 | 34.19 | 40.21 | 45.32 | 49.90 | 58.74 | 65.90 | 80.03 | 80.29 | 66.53 | 50.65 | 41.47 | 30.61 | 53.65 | |||||||||||||
| 1985 | 30.35 | 32.96 | 42.81 | 56.90 | a | 64.10 | 71.10 | 85.55 | 73.52 | 60.20 | 53.45 | 28.97 | 33.48 | 52.78 | ||||||||||||
| 1986 | 41.10 | 39.79 | 51.19 | 52.47 | 62.87 | 76.07 | 73.58 | 83.39 | 60.30 | 59.19 | 40.53 | 36.26 | 56.39 | |||||||||||||
| 1987 | 33.65 | 41.61 | 46.84 | 62.83 | 64.84 | 73.80 | 74.68 | 77.32 | 76.03 | 65.32 | 44.63 | 34.94 | 58.04 | |||||||||||||
| 1988 | 32.84 | 43.17 | 45.71 | 58.07 | 60.52 | 69.47 | 78.39 | 80.45 | 71.20 | 66.90 | 40.20 | 35.06 | 56.83 | |||||||||||||
| 1989 | 33.81 | 29.46 | 43.35 | 57.43 | 60.00 | 71.33 | 79.26 | 73.19 | 71.33 | 55.81 | 45.13 | 39.52 | 54.97 | |||||||||||||
| 1990 | 37.23 | 37.32 | 48.71 | 57.47 | 58.81 | 67.57 | 80.19 | 78.10 | 79.10 | 54.29 | 43.50 | 26.84 | 55.76 | |||||||||||||
| 1991 | 32.84 | 47.54 | 43.68 | 51.80 | 56.87 | 63.40 | 78.00 | 83.19 | 74.43 | 59.06 | 36.44 | n | 38.23 | 57.19 | ||||||||||||
| 1992 | 38.13 | 48.03 | 54.71 | 57.30 | 69.35 | 75.33 | 74.81 | 81.06 | 70.20 | 60.61 | 38.60 | 32.48 | 58.39 | |||||||||||||
| 1993 | 30.87 | 35.32 | 47.87 | 51.87 | 68.35 | 67.93 | 66.29 | 73.97 | 70.70 | 59.94 | 39.63 | 37.52 | 54.19 | |||||||||||||
| 1994 | 40.55 | 38.79 | 51.29 | 56.80 | 64.81 | 69.67 | 82.84 | 83.42 | 75.30 | 55.81 | 35.67 | 36.00 | 57.58 | |||||||||||||
| 1995 | 37.61 | 44.57 | 46.00 | 51.67 | 61.94 | 66.30 | 75.71 | 75.65 | 71.93 | 51.71 | 47.30 | 36.19 | 55.55 | |||||||||||||
| 1996 | 35.00 | 39.31 | 47.10 | 54.93 | 56.35 | 70.47 | 82.29 | 80.94 | 66.03 | 55.61 | 43.57 | 35.94 | 55.63 | |||||||||||||
| 1997 | 35.06 | 37.57 | 46.42 | 50.00 | 65.94 | 66.57 | 74.61 | 81.10 | 72.03 | 54.58 | 46.27 | 36.19 | 55.53 | |||||||||||||
| 1998 | 38.55 | 42.75 | 47.42 | 53.60 | 61.45 | 66.70 | 82.65 | 83.58 | 75.80 | 55.39 | 42.33 | 33.39 | 56.97 | |||||||||||||
| 1999 | 37.61 | 38.04 | 46.35 | 51.13 | 58.71 | 66.17 | 77.35 | 80.94 | 70.57 | 60.26 | 51.07 | 35.48 | 56.14 | |||||||||||||
| 2000 | 35.16 | 41.52 | 46.87 | 58.07 | 60.19 | 70.27 | 79.16 | 81.00 | 66.87 | 55.74 | 36.27 | 34.90 | 55.50 | |||||||||||||
| 2001 | 35.61 | 37.00 | 47.94 | 50.40 | 66.58 | 66.33 | 77.00 | 83.58 | 76.47 | 56.94 | 47.10 | 34.77 | 56.64 | |||||||||||||
| 2002 | 34.35 | 38.93 | 40.90 | 53.20 | 60.61 | 70.03 | 82.58 | 76.55 | 71.57 | 54.58 | 46.80 | 38.97 | 55.76 | |||||||||||||
| 2003 | 41.87 | 37.25 | 46.35 | 51.67 | 61.06 | 72.03 | 85.55 | 83.65 | 73.63 | 62.71 | 37.83 | 36.42 | 57.50 | |||||||||||||
| 2004 | 35.23 | 38.83 | 53.55 | 58.17 | 59.58 | 70.37 | 80.97 | 78.16 | 66.37 | 56.74 | 42.80 | 40.00 | 56.73 | |||||||||||||
| 2005 | 39.10 | 43.82 | 50.03 | 54.17 | 62.32 | 66.37 | 81.45 | 82.29 | 69.27 | 58.19 | 41.80 | 35.23 | 57.00 | |||||||||||||
| 2006 | 40.26 | 37.29 | 43.90 | 54.37 | 66.03 | 71.20 | 84.77 | 80.10 | 72.00 | 55.77 | 42.90 | 37.32 | 57.16 | |||||||||||||
| 2007 | 31.94 | 40.32 | 51.90 | 54.57 | 64.45 | 70.03 | 87.23 | 80.23 | 69.60 | 55.97 | 43.70 | 33.32 | 56.94 | |||||||||||||
| 2008 | 32.97 | 39.48 | 42.32 | 49.17 | 61.84 | 68.20 | 80.97 | 80.19 | 71.67 | 58.00 | 47.53 | 31.52 | 55.32 | |||||||||||||
| 2009 | 36.71 | 41.50 | 40.71 | 53.33 | ----- | z | 70.13 | 81.77 | 79.74 | 76.60 | 51.55 | 44.33 | 30.32 | 55.16 | ||||||||||||
| 2010 | 39.52 | 41.86 | 49.55 | 42.00 | z | 58.50 | e | 65.83 | 78.58 | 78.06 | ----- | z | ----- | z | ----- | z | 37.10 | 56.12 | ||||||||
| 2011 | 36.41 | d | 35.27 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.84 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.62 | 39.75 | 46.80 | 54.17 | 61.57 | 69.16 | 78.87 | 79.61 | 70.50 | 57.27 | 42.28 | 35.14 | 55.87 | |||||||||||||
| S.D. | 3.81 | 3.91 | 3.70 | 3.44 | 3.45 | 3.09 | 4.29 | 3.21 | 4.59 | 3.66 | 4.35 | 3.69 | 1.36 | |||||||||||||
| SKEW | -0.56 | -0.13 | 0.08 | 0.48 | 0.39 | 0.28 | -0.41 | -0.59 | -0.43 | 0.58 | -0.69 | -0.63 | -0.38 | |||||||||||||
| MAX | 41.87 | 48.03 | 54.71 | 62.83 | 69.35 | 76.07 | 87.23 | 83.94 | 79.10 | 66.90 | 51.07 | 41.87 | 58.39 | |||||||||||||
| MIN | 24.13 | 29.46 | 39.81 | 48.90 | 56.16 | 63.40 | 66.29 | 73.19 | 60.20 | 50.65 | 28.97 | 26.00 | 52.78 | |||||||||||||
| NO YRS | 35 | 35 | 34 | 33 | 33 | 34 | 34 | 34 | 33 | 34 | 33 | 35 | 31 | |||||||||||||