| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1963 | ----- | z | ----- | z | ----- | z | 46.63 | 58.52 | 62.72 | 65.92 | 68.24 | 66.78 | 54.68 | 44.72 | a | 39.68 | 56.43 | |||||||||
| 1964 | 38.35 | 40.53 | 43.40 | 48.28 | 53.44 | d | 62.12 | a | 69.32 | 66.87 | 59.47 | 55.92 | 41.03 | 39.92 | 51.56 | |||||||||||
| 1965 | 37.95 | 41.29 | ----- | z | 50.71 | b | 54.95 | 62.38 | 70.23 | 68.63 | e | ----- | z | ----- | z | ----- | z | 35.12 | b | 52.66 | ||||||
| 1966 | 38.42 | 39.57 | 45.24 | 51.80 | 58.10 | 62.32 | 66.29 | 68.24 | 63.03 | 53.84 | b | 45.78 | 40.23 | 52.74 | ||||||||||||
| 1967 | 40.10 | 42.38 | 43.39 | 43.87 | 57.90 | a | 65.77 | 71.39 | 73.95 | 67.72 | 53.76 | 45.27 | 35.44 | 53.41 | ||||||||||||
| 1968 | 38.05 | 47.09 | 48.18 | 49.35 | 56.63 | a | 65.05 | 70.94 | 67.21 | 64.40 | 53.16 | 45.10 | 38.47 | 53.63 | ||||||||||||
| 1969 | 36.02 | 39.64 | 45.34 | 49.42 | 61.37 | 65.28 | 67.95 | c | 66.66 | 64.57 | 50.74 | 43.77 | 40.40 | 52.60 | ||||||||||||
| 1970 | 42.06 | 44.94 | a | 46.67 | a | 45.13 | 57.82 | 66.68 | 71.19 | 68.98 | 61.07 | 53.81 | 46.77 | 38.29 | 53.62 | |||||||||||
| 1971 | 36.85 | 41.25 | 43.10 | a | 47.95 | 55.79 | 60.72 | 70.20 | c | 71.02 | 60.17 | 51.21 | 43.57 | 36.45 | 51.52 | |||||||||||
| 1972 | 37.65 | 43.71 | 50.42 | 48.77 | 58.82 | 65.42 | 72.29 | 70.53 | 61.60 | 53.32 | 45.00 | 35.74 | 53.61 | |||||||||||||
| 1973 | 39.00 | 45.36 | 43.95 | 51.18 | 61.39 | 66.03 | 72.19 | 69.03 | 64.22 | 52.40 | 44.12 | 43.73 | 54.38 | |||||||||||||
| 1974 | 36.61 | 40.41 | 45.68 | 49.82 | 56.34 | 66.80 | 69.21 | 70.87 | 68.35 | 55.19 | 45.98 | 39.33 | a | 53.72 | ||||||||||||
| 1975 | 38.38 | a | 41.57 | 43.16 | 45.20 | 58.00 | 62.97 | 69.94 | 65.58 | 66.50 | 52.08 | 42.60 | 40.66 | 52.22 | ||||||||||||
| 1976 | 40.47 | 41.41 | 43.61 | 48.32 | 58.10 | 61.30 | 70.27 | 65.78 | f | 64.28 | 55.47 | 46.22 | 34.44 | 51.26 | ||||||||||||
| 1977 | 36.18 | 45.71 | 43.74 | 54.02 | 53.13 | 68.12 | 70.27 | 74.45 | 62.50 | 53.42 | 43.85 | 42.77 | 54.01 | |||||||||||||
| 1978 | 42.65 | 44.23 | 50.85 | 49.43 | 56.26 | 65.05 | 69.81 | 68.81 | 58.92 | 56.76 | 40.77 | 35.31 | 53.24 | |||||||||||||
| 1979 | 36.18 | 41.88 | 49.52 | 50.50 | 58.06 | 63.85 | 69.45 | 67.24 | 65.92 | 57.50 | 42.22 | 40.48 | 53.57 | |||||||||||||
| 1980 | 38.87 | 45.36 | 43.77 | 51.63 | 55.89 | 59.65 | 69.95 | 66.47 | 64.32 | 56.31 | 45.33 | 40.73 | 53.19 | |||||||||||||
| 1981 | 42.69 | 44.02 | 47.52 | 53.37 | 57.50 | 65.02 | c | 69.73 | 72.44 | 65.43 | 52.47 | 45.98 | 42.89 | 54.92 | ||||||||||||
| 1982 | 36.32 | 41.46 | 44.31 | 47.98 | 56.97 | 65.62 | 68.74 | 69.42 | 60.63 | 54.56 | 42.77 | 39.53 | 52.36 | |||||||||||||
| 1983 | 41.13 | 43.84 | 47.40 | 48.18 | 59.10 | 62.15 | 65.95 | 69.76 | 61.35 | 55.45 | 44.58 | 39.77 | 53.22 | |||||||||||||
| 1984 | 40.42 | 43.50 | 48.47 | 49.37 | 57.63 | 61.45 | a | 70.92 | 68.53 | 62.28 | 51.02 | a | 44.20 | 36.69 | 52.87 | |||||||||||
| 1985 | 38.61 | 42.45 | 43.50 | 55.05 | 56.55 | 66.22 | 73.26 | 68.68 | 59.95 | 52.82 | 38.78 | 37.87 | 52.81 | |||||||||||||
| 1986 | 44.97 | 46.04 | 51.13 | 51.50 | 58.06 | 68.17 | 67.08 | 73.11 | 58.57 | 55.00 | 46.05 | 39.84 | 54.96 | |||||||||||||
| 1987 | 39.52 | 43.66 | 46.95 | 56.07 | 60.47 | 68.75 | 67.23 | 70.35 | 63.48 | 59.31 | 46.13 | 39.47 | 55.12 | |||||||||||||
| 1988 | 39.82 | 46.00 | 46.66 | 52.80 | 55.21 | 62.68 | 69.21 | 70.05 | 65.83 | 61.21 | 45.27 | 38.48 | 54.44 | |||||||||||||
| 1989 | 38.74 | 37.77 | 46.98 | 56.22 | 57.48 | 65.37 | 67.27 | 67.50 | 63.88 | 54.90 | 44.04 | b | 38.39 | 53.21 | ||||||||||||
| 1990 | 40.89 | 41.02 | 48.97 | 56.85 | 55.81 | 63.62 | 72.29 | 69.84 | 66.17 | 54.87 | 43.47 | 32.50 | 53.86 | |||||||||||||
| 1991 | 38.95 | 47.71 | 43.84 | 48.73 | 54.56 | ----- | z | 71.10 | a | 70.76 | 67.33 | 66.38 | z | 48.45 | 37.26 | 52.87 | ||||||||||
| 1992 | 40.98 | 47.53 | 51.05 | 56.32 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.98 | 37.58 | 46.41 | |||||||
| 1993 | 37.98 | 40.70 | 50.50 | 50.78 | 60.02 | 63.20 | 64.44 | 68.77 | 66.13 | 57.74 | 40.17 | 39.85 | 53.36 | |||||||||||||
| 1994 | 41.84 | 42.14 | 49.65 | 53.21 | i | 60.44 | 64.25 | 73.15 | 68.60 | 66.30 | 53.11 | 39.63 | 40.23 | 54.48 | ||||||||||||
| 1995 | 43.94 | 48.96 | 46.56 | 51.13 | 58.98 | 62.32 | 70.87 | 67.74 | 66.73 | 55.63 | 49.73 | 43.92 | 55.54 | |||||||||||||
| 1996 | 41.15 | 47.50 | 48.77 | 52.90 | 56.27 | 63.60 | 74.48 | 71.18 | 61.42 | 53.81 | 45.47 | ----- | z | 56.05 | ||||||||||||
| 1997 | 40.55 | 44.07 | 49.42 | 52.55 | 62.24 | 64.00 | 70.48 | 71.92 | 63.55 | 51.73 | 46.32 | 38.02 | 54.57 | |||||||||||||
| 1998 | 43.89 | 45.38 | x | 47.82 | q | 49.87 | 59.06 | v | 64.80 | y | 73.00 | z | 75.12 | k | 64.29 | r | 53.61 | v | ----- | z | 42.80 | z | 46.88 | |||
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.65 | 39.27 | 39.96 | |||
| 2001 | 40.02 | a | 41.02 | a | 48.39 | 48.38 | 64.10 | b | 63.93 | 70.85 | a | 71.42 | a | 66.17 | a | 55.87 | a | 46.32 | 40.53 | 54.75 | ||||||
| 2002 | 39.15 | 43.77 | 44.32 | 52.80 | 57.27 | 66.38 | 74.03 | 69.50 | 65.25 | 52.66 | 45.58 | 40.87 | 54.30 | |||||||||||||
| 2003 | 44.68 | 41.41 | 46.42 | 47.37 | 57.11 | 67.25 | 74.77 | 71.42 | 66.55 | 56.76 | 41.13 | c | 41.18 | 54.67 | ||||||||||||
| 2004 | 40.31 | 42.55 | 51.29 | 53.18 | 57.82 | 65.95 | 73.50 | e | 71.74 | 62.22 | 54.26 | 42.85 | 40.21 | 54.66 | ||||||||||||
| 2005 | 38.18 | f | 43.52 | 47.86 | b | 49.63 | 57.92 | 60.55 | a | 72.69 | 72.05 | 60.07 | 53.13 | 43.02 | 39.45 | 54.54 | ||||||||||
| 2006 | 40.56 | 42.11 | 41.94 | 49.65 | 60.42 | 67.18 | 74.77 | 69.37 | 64.72 | 53.66 | 45.85 | 40.05 | 54.19 | |||||||||||||
| 2007 | 35.97 | 42.09 | 48.71 | b | ----- | z | 59.11 | 64.20 | 71.11 | 68.08 | 60.48 | e | 50.53 | 44.60 | d | 36.56 | 52.86 | |||||||||
| 2008 | 34.82 | 40.28 | 42.82 | 46.15 | 57.60 | 61.62 | 69.77 | 69.20 | h | 64.42 | e | 52.53 | 44.95 | 34.98 | 49.99 | |||||||||||
| 2009 | 37.92 | f | 41.81 | g | 42.98 | e | 49.48 | e | 57.27 | c | 63.61 | c | 72.16 | b | 67.90 | 63.26 | e | 50.96 | f | 42.43 | 35.48 | e | 54.95 | |||
| 2010 | 43.53 | 44.22 | h | 46.29 | 46.67 | 53.74 | 62.12 | e | 72.19 | j | 68.96 | h | 63.74 | k | 55.86 | i | 43.73 | 40.78 | h | 49.35 | ||||||
| 2011 | 40.02 | g | 40.52 | g | 44.30 | f | 47.06 | d | 53.17 | e | 63.17 | d | 68.31 | 71.06 | d | 68.25 | 54.88 | e | 44.34 | e | 35.95 | c | 56.24 | |||
| 2012 | 40.20 | c | 42.50 | f | 44.00 | d | 51.66 | h | 59.54 | e | 61.90 | d | 71.98 | b | 74.05 | a | 68.95 | 57.97 | 48.33 | 42.92 | 56.98 | |||||
| 2013 | 39.32 | a | 43.83 | a | 50.16 | f | 56.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.50 | z | 41.57 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.66 | 43.15 | 46.52 | 50.27 | 57.67 | 64.14 | 70.38 | 69.72 | 63.94 | 54.42 | 44.30 | 38.85 | 53.66 | |||||||||||||
| S.D. | 2.47 | 2.52 | 2.76 | 3.12 | 2.34 | 2.21 | 2.44 | 2.14 | 2.77 | 2.30 | 2.29 | 2.58 | 1.00 | |||||||||||||
| SKEW | 0.25 | 0.36 | 0.16 | 0.29 | 0.24 | 0.14 | -0.28 | 0.36 | -0.19 | 0.67 | -0.29 | -0.22 | -0.29 | |||||||||||||
| MAX | 44.97 | 48.96 | 51.29 | 56.85 | 64.10 | 68.75 | 74.77 | 74.45 | 68.95 | 61.21 | 49.73 | 43.92 | 55.54 | |||||||||||||
| MIN | 34.82 | 37.77 | 41.94 | 43.87 | 53.13 | 59.65 | 64.44 | 65.58 | 58.57 | 50.53 | 38.78 | 32.50 | 51.52 | |||||||||||||
| NO YRS | 45 | 43 | 44 | 45 | 46 | 45 | 45 | 43 | 44 | 42 | 47 | 46 | 33 | |||||||||||||