| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.93 | q | 68.03 | 68.43 | 46.61 | 38.33 | 33.94 | 51.07 | ||||||
| 1952 | 30.90 | 37.31 | 36.71 | 52.13 | 54.74 | 57.60 | 72.10 | 70.55 | 70.53 | 66.87 | 43.57 | 36.00 | 52.42 | |||||||||||||
| 1953 | 40.97 | 40.25 | d | 40.94 | 44.07 | 48.06 | 51.57 | 69.71 | 67.19 | 68.03 | 56.06 | 45.40 | 39.29 | 50.96 | ||||||||||||
| 1954 | 34.35 | 45.42 | d | 39.33 | a | 45.17 | 55.57 | a | 53.17 | 64.77 | 59.32 | 60.34 | a | 53.00 | b | 48.27 | 37.47 | a | 49.68 | |||||||
| 1955 | 36.19 | 35.44 | a | 33.68 | 39.60 | 49.06 | 59.27 | 61.87 | 69.32 | 62.40 | 54.23 | 34.67 | 32.55 | 47.36 | ||||||||||||
| 1956 | 31.74 | 31.71 | a | 36.69 | b | 48.10 | 57.90 | 57.27 | 72.06 | 67.55 | 65.40 | e | 51.00 | 47.00 | a | 45.29 | 50.98 | |||||||||
| 1957 | 31.61 | 39.96 | 42.42 | 46.27 | 57.52 | 61.87 | 65.42 | 63.94 | 68.97 | 50.97 | 44.83 | 41.29 | 51.25 | |||||||||||||
| 1958 | 40.23 | 42.86 | 40.87 | 44.73 | 65.32 | 62.53 | 74.03 | 73.84 | 61.97 | 59.42 | 43.07 | 43.45 | 54.36 | |||||||||||||
| 1959 | 35.68 | 35.25 | 39.71 | 47.53 | 49.42 | 59.83 | 71.97 | 67.61 | 57.43 | 56.07 | a | 47.20 | 39.42 | 50.59 | ||||||||||||
| 1960 | 32.84 | 34.90 | 42.90 | 46.57 | 49.03 | 63.13 | 72.77 | 64.10 | 65.33 | 57.03 | 40.72 | a | 41.13 | 50.87 | ||||||||||||
| 1961 | 41.10 | 38.96 | 39.26 | 45.67 | 50.94 | 68.47 | 71.23 | 74.23 | 56.90 | 50.81 | 41.53 | 34.90 | 51.17 | |||||||||||||
| 1962 | 37.55 | 40.86 | 37.90 | 51.77 | 44.90 | 60.37 | 67.87 | 64.45 | 66.73 | 55.94 | 45.10 | 42.58 | 51.33 | |||||||||||||
| 1963 | 35.74 | 47.89 | 42.10 | 41.40 | 54.58 | 56.13 | 61.71 | 68.19 | 70.23 | 53.97 | 40.67 | 43.23 | 51.32 | |||||||||||||
| 1964 | 34.48 | 40.24 | 38.16 | 42.40 | 48.74 | 55.87 | ----- | z | 63.03 | 61.03 | 56.61 | 40.53 | 33.71 | 46.80 | ||||||||||||
| 1965 | 39.06 | 40.43 | 44.94 | 48.50 | 51.10 | 58.87 | 70.58 | 67.71 | 59.20 | 61.97 | 46.30 | 37.65 | 52.19 | |||||||||||||
| 1966 | 36.26 | 37.14 | 41.71 | 49.60 | 57.48 | 57.80 | 65.13 | 67.58 | 65.43 | 55.48 | 44.27 | 37.52 | 51.28 | |||||||||||||
| 1967 | 36.61 | 41.46 | 38.52 | 41.93 | 54.48 | 62.73 | 70.81 | 77.19 | 71.00 | 52.23 | 44.30 | 34.52 | 52.15 | |||||||||||||
| 1968 | 35.74 | 43.17 | 45.26 | 44.17 | 52.32 | 58.90 | 71.16 | 63.39 | 60.97 | 50.06 | 40.83 | 31.90 | 49.82 | |||||||||||||
| 1969 | 28.13 | 34.18 | 43.71 | 44.87 | 59.13 | 62.90 | 65.94 | 65.77 | 61.37 | 47.26 | 46.50 | 37.77 | 49.79 | |||||||||||||
| 1970 | 34.52 | 41.61 | 39.03 | 38.87 | 53.68 | 65.23 | 69.19 | 71.23 | 55.90 | 49.94 | 40.40 | 33.19 | 49.40 | |||||||||||||
| 1971 | 34.52 | 38.32 | 35.16 | 43.00 | 52.71 | 54.17 | 72.58 | 73.84 | 57.60 | 48.87 | 38.83 | 32.42 | 48.50 | |||||||||||||
| 1972 | 31.29 | 38.28 | 42.81 | 40.60 | 56.35 | 61.57 | 72.55 | 72.19 | 56.53 | 52.52 | 39.57 | 30.55 | 49.57 | |||||||||||||
| 1973 | 31.97 | 39.82 | 38.45 | 45.80 | 56.48 | 59.40 | 69.71 | 65.74 | 61.47 | 50.71 | 34.83 | 36.77 | 49.26 | |||||||||||||
| 1974 | 30.03 | 36.11 | 38.71 | 41.80 | 46.97 | 63.50 | 66.03 | 70.84 | 69.20 | 57.32 | 42.23 | 36.32 | 49.92 | |||||||||||||
| 1975 | 36.00 | 35.32 | 37.03 | 38.77 | 51.90 | 56.90 | 68.06 | 60.90 | 67.07 | 46.81 | 38.27 | 38.61 | 47.97 | |||||||||||||
| 1976 | 39.26 | 37.28 | 37.74 | 42.30 | 54.23 | 55.47 | 67.26 | 63.00 | 64.57 | 56.58 | 48.07 | 41.84 | 50.63 | |||||||||||||
| 1977 | 38.87 | 43.75 | 35.81 | 50.53 | 45.55 | 63.87 | 64.90 | 73.03 | 56.90 | 53.13 | 37.23 | 36.45 | 50.00 | |||||||||||||
| 1978 | 36.16 | 39.29 | 46.32 | 43.93 | 48.29 | 62.70 | 67.87 | 65.32 | 55.67 | 56.29 | 37.87 | 31.48 | 49.27 | |||||||||||||
| 1979 | 27.06 | 33.25 | 43.71 | 42.17 | 54.90 | 61.77 | 69.23 | 65.26 | 66.80 | 54.58 | 39.53 | 38.81 | 49.76 | |||||||||||||
| 1980 | 31.97 | 37.69 | 36.77 | 48.40 | 51.19 | 53.30 | 67.84 | 63.42 | 61.47 | 55.55 | 42.17 | 43.45 | 49.43 | |||||||||||||
| 1981 | 40.42 | 38.82 | 42.06 | 44.40 | 50.16 | 54.83 | 65.81 | 72.71 | 62.73 | 50.23 | 44.10 | 34.39 | 50.06 | |||||||||||||
| 1982 | 32.16 | 34.32 | 38.94 | 43.10 | 50.97 | 62.07 | 66.71 | 68.52 | 59.00 | 49.84 | 37.40 | 34.65 | 48.14 | |||||||||||||
| 1983 | 37.74 | 38.14 | 41.65 | 45.23 | 56.61 | 56.93 | 61.35 | 67.55 | 58.03 | 53.74 | 39.10 | 28.48 | 48.71 | |||||||||||||
| 1984 | 38.58 | 39.69 | 41.90 | 40.57 | 49.13 | 55.87 | 70.26 | 69.74 | 57.77 | 46.10 | 36.47 | 31.00 | 48.09 | |||||||||||||
| 1985 | 34.42 | 34.57 | 38.94 | 48.70 | 53.10 | 62.30 | 75.16 | 65.48 | 54.83 | 49.61 | 29.83 | 42.16 | 49.09 | |||||||||||||
| 1986 | 40.39 | 37.61 | 47.71 | 43.87 | 52.84 | 65.63 | 60.19 | 74.06 | 53.90 | 57.68 | 41.31 | a | 37.94 | 51.09 | ||||||||||||
| 1987 | 35.71 | 39.89 | 41.16 | 53.57 | 56.03 | 64.67 | 63.32 | 69.42 | 67.53 | 63.55 | 42.03 | 32.19 | 52.42 | |||||||||||||
| 1988 | 34.35 | 42.97 | 41.03 | 46.73 | 51.77 | 58.17 | 67.32 | 68.26 | 64.63 | 64.55 | 38.37 | 38.42 | 51.38 | |||||||||||||
| 1989 | 36.23 | 28.93 | 38.74 | 51.17 | 51.65 | 62.93 | 62.13 | 62.35 | 66.00 | 51.16 | 43.21 | a | 45.68 | 50.01 | ||||||||||||
| 1990 | 35.55 | 34.04 | 44.10 | 51.83 | 49.10 | 58.03 | 71.65 | 68.23 | 68.53 | 49.94 | 40.47 | 28.74 | 50.02 | |||||||||||||
| 1991 | 36.68 | 46.68 | 37.61 | 41.83 | 45.87 | 52.33 | 69.03 | 70.81 | 68.73 | 56.23 | 40.90 | 37.58 | 50.36 | |||||||||||||
| 1992 | 38.74 | 44.45 | 50.65 | 48.83 | 63.23 | 65.47 | 67.97 | 71.29 | 60.73 | 56.97 | 40.13 | 31.45 | 53.33 | |||||||||||||
| 1993 | 29.71 | 33.32 | 43.29 | 43.00 | 57.58 | 55.77 | 55.97 | 65.90 | 68.17 | 56.48 | 39.63 | 37.58 | 48.87 | |||||||||||||
| 1994 | 41.77 | 36.46 | 46.00 | 47.77 | 54.81 | 57.77 | 70.65 | 66.77 | 68.07 | 50.03 | 33.77 | 35.13 | 50.75 | |||||||||||||
| 1995 | 36.48 | 46.71 | 40.45 | 43.90 | 55.35 | 57.47 | 67.65 | 65.19 | 65.47 | 48.65 | 45.67 | 35.03 | 50.67 | |||||||||||||
| 1996 | 36.43 | a | 37.62 | 42.71 | 46.63 | 47.97 | 60.03 | 73.23 | 71.37 | a | 60.57 | 52.29 | 43.30 | 35.26 | 50.62 | |||||||||||
| 1997 | 36.39 | 37.75 | 40.03 | 43.17 | 57.84 | 57.80 | 66.43 | a | 70.68 | 63.27 | 50.58 | 43.90 | 36.77 | 50.38 | ||||||||||||
| 1998 | 36.87 | 37.68 | 41.81 | 45.73 | 47.61 | 58.23 | 71.19 | 73.52 | 68.20 | 51.45 | 40.20 | 32.90 | 50.45 | |||||||||||||
| 1999 | 35.97 | 33.39 | 38.16 | 42.57 | 48.26 | 56.27 | 68.16 | 69.19 | 66.03 | 56.42 | 45.90 | 37.65 | 49.83 | |||||||||||||
| 2000 | 32.58 | 38.59 | 39.68 | 50.52 | a | 50.90 | 63.47 | 64.81 | 67.74 | 60.47 | 51.48 | 37.03 | 35.90 | 49.43 | ||||||||||||
| 2001 | 37.81 | 36.43 | 42.65 | 41.83 | 58.35 | 56.80 | 65.71 | 70.10 | 66.97 | 52.00 | 42.97 | 33.58 | 50.43 | |||||||||||||
| 2002 | 33.61 | 38.79 | 35.87 | 44.23 | 50.68 | 62.10 | 71.29 | 68.81 | 65.63 | 52.19 | 45.93 | 36.81 | 50.50 | |||||||||||||
| 2003 | 40.74 | 38.36 | 40.19 | 42.23 | 50.81 | 64.17 | 72.68 | 71.39 | 67.23 | 56.26 | 36.13 | 34.61 | 51.23 | |||||||||||||
| 2004 | 35.16 | 36.52 | 45.65 | 51.27 | 52.87 | 60.43 | 70.84 | 69.45 | 57.53 | 52.87 | 42.20 | 39.55 | 51.19 | |||||||||||||
| 2005 | 36.74 | 41.04 | 45.35 | 44.33 | 53.35 | 54.07 | 69.06 | 71.58 | 60.77 | 52.77 | 41.90 | 34.61 | 50.47 | |||||||||||||
| 2006 | 36.68 | 33.82 | 36.90 | 46.77 | 56.19 | 60.97 | 71.68 | 69.03 | 64.77 | 52.35 | 37.73 | 36.19 | 50.26 | |||||||||||||
| 2007 | 34.65 | 36.50 | 45.10 | 44.67 | 54.06 | 58.30 | 70.52 | 66.00 | 58.73 | 48.03 | 43.63 | 32.03 | 49.35 | |||||||||||||
| 2008 | 32.19 | 39.03 | 36.52 | 39.53 | 50.23 | 58.50 | 69.71 | 69.00 | 64.63 | 52.29 | 43.90 | 32.58 | 49.01 | |||||||||||||
| 2009 | 36.00 | 37.46 | 33.30 | a | 43.80 | 55.71 | 60.17 | 73.42 | 68.55 | 66.87 | 47.10 | 39.40 | 32.32 | 49.51 | ||||||||||||
| 2010 | 38.52 | 39.93 | 41.94 | 41.60 | 46.26 | 54.37 | 67.97 | 68.13 | 59.43 | 53.55 | 36.67 | 34.35 | 48.56 | |||||||||||||
| 2011 | 37.13 | 32.93 | 36.06 | 37.86 | b | 44.65 | 54.07 | 61.90 | 69.52 | 66.83 | a | 51.29 | 37.50 | 37.42 | 47.26 | |||||||||||
| 2012 | 37.30 | a | 35.76 | 37.00 | 45.97 | 52.23 | 54.79 | f | 66.87 | 73.16 | 68.53 | 52.42 | 42.00 | 31.97 | 49.38 | |||||||||||
| 2013 | 37.39 | 34.64 | 37.86 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.63 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.68 | 38.24 | 40.44 | 45.05 | 52.60 | 59.27 | 68.25 | 68.41 | 63.31 | 53.35 | 41.21 | 36.27 | 50.22 | |||||||||||||
| S.D. | 3.22 | 3.80 | 3.54 | 3.69 | 4.29 | 3.79 | 3.88 | 3.60 | 4.58 | 4.27 | 3.79 | 3.96 | 1.36 | |||||||||||||
| SKEW | -0.41 | 0.37 | 0.38 | 0.34 | 0.41 | 0.08 | -0.74 | -0.12 | -0.24 | 0.88 | -0.35 | 0.41 | 0.35 | |||||||||||||
| MAX | 41.77 | 47.89 | 50.65 | 53.57 | 65.32 | 68.47 | 75.16 | 77.19 | 71.00 | 66.87 | 48.27 | 45.68 | 54.36 | |||||||||||||
| MIN | 27.06 | 28.93 | 33.30 | 37.86 | 44.65 | 51.57 | 55.97 | 59.32 | 53.90 | 46.10 | 29.83 | 28.48 | 47.26 | |||||||||||||
| NO YRS | 62 | 62 | 62 | 61 | 61 | 60 | 60 | 62 | 62 | 62 | 62 | 62 | 59 | |||||||||||||