| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1962 | ----- | z | ----- | z | 45.46 | h | 52.82 | 53.26 | 61.88 | 69.90 | a | 65.74 | 63.68 | 51.95 | 46.52 | 40.35 | 56.23 | |||||||||
| 1963 | 34.39 | 49.16 | 44.65 | a | 47.43 | 57.90 | 62.13 | 65.10 | 66.25 | c | 64.98 | 53.97 | 44.80 | 39.18 | 52.50 | |||||||||||
| 1964 | 38.89 | 40.81 | 44.42 | 48.53 | 54.45 | 61.62 | 68.40 | 66.91 | b | 60.55 | b | 55.66 | 42.62 | 41.31 | 52.01 | |||||||||||
| 1965 | 38.13 | 42.09 | 46.73 | a | 51.52 | 55.55 | 63.13 | 69.65 | a | 67.60 | a | 60.34 | a | 55.55 | a | 45.87 | 37.21 | 52.78 | ||||||||
| 1966 | 40.34 | 41.12 | 46.47 | 54.07 | 59.34 | 62.73 | 66.27 | 69.18 | 63.26 | a | 53.63 | a | 45.60 | d | 40.84 | 53.57 | ||||||||||
| 1967 | 39.47 | a | 42.87 | a | 43.28 | a | 44.23 | b | 57.60 | 65.87 | 71.34 | 73.13 | 65.40 | 53.73 | 45.75 | b | 37.35 | 53.33 | ||||||||
| 1968 | 38.00 | 47.74 | 47.92 | a | 50.20 | 56.22 | a | 67.09 | h | 71.18 | 66.31 | 62.23 | 52.71 | 45.27 | b | 38.82 | 52.42 | |||||||||
| 1969 | 35.74 | 38.75 | 45.03 | 49.23 | 61.23 | 64.92 | 69.27 | 66.95 | 63.58 | 49.60 | 43.55 | 40.71 | 52.38 | |||||||||||||
| 1970 | 42.56 | 44.61 | 46.50 | 45.18 | 58.27 | 66.85 | 71.79 | 67.97 | 59.65 | 51.61 | 46.13 | 38.19 | 53.28 | |||||||||||||
| 1971 | 36.97 | 41.14 | 43.05 | 47.37 | 55.92 | 60.52 | 70.08 | 69.56 | 60.02 | 50.29 | 43.17 | 36.31 | 51.20 | |||||||||||||
| 1972 | 37.00 | 42.28 | 49.85 | a | 48.98 | 58.74 | 66.17 | 73.18 | a | 69.56 | f | ----- | z | ----- | z | 43.09 | n | 35.08 | 51.41 | |||||||
| 1973 | 38.84 | 44.75 | 43.31 | 51.28 | 59.83 | a | 63.85 | 69.60 | 67.06 | 63.02 | 51.53 | 43.73 | 43.15 | 53.33 | ||||||||||||
| 1974 | 37.73 | 40.75 | 45.82 | 49.12 | 55.21 | 65.78 | 67.26 | 69.85 | 66.90 | 53.42 | 45.43 | 41.52 | 53.23 | |||||||||||||
| 1975 | 40.40 | 41.29 | 43.81 | 45.07 | 57.45 | 62.85 | 68.69 | 66.55 | 66.22 | 51.90 | 42.88 | 41.48 | 52.38 | |||||||||||||
| 1976 | 40.98 | 41.79 | 43.77 | 47.42 | 56.05 | 60.28 | 68.15 | 65.55 | 64.20 | 54.90 | 47.07 | 35.79 | 52.16 | |||||||||||||
| 1977 | 36.89 | 45.32 | 43.71 | 52.43 | 51.15 | 67.87 | 67.69 | 71.47 | 61.88 | 54.53 | 44.77 | 43.65 | 53.45 | |||||||||||||
| 1978 | 43.29 | 45.14 | 50.97 | 47.98 | 55.55 | 63.13 | 69.37 | 67.69 | 58.92 | 56.79 | 42.07 | 36.31 | 53.10 | |||||||||||||
| 1979 | 37.21 | 41.48 | 49.32 | 49.48 | 58.05 | 62.88 | 68.06 | 66.15 | 64.92 | 57.71 | 42.67 | 41.56 | 53.29 | |||||||||||||
| 1980 | 40.34 | 45.88 | 44.61 | 51.03 | 55.11 | 58.55 | 69.39 | 67.35 | 63.60 | 55.68 | 45.73 | 41.16 | 53.20 | |||||||||||||
| 1981 | 42.40 | 43.41 | 46.82 | 52.37 | 56.11 | 63.52 | 69.40 | 70.29 | 63.12 | 52.69 | 45.90 | 44.19 | 54.19 | |||||||||||||
| 1982 | 36.74 | 42.59 | 43.35 | 46.30 | 57.81 | 64.40 | 67.21 | 67.06 | 61.37 | 54.02 | 43.43 | 40.39 | 52.06 | |||||||||||||
| 1983 | 40.00 | 43.91 | 47.19 | 47.78 | 58.10 | 61.02 | 64.42 | 68.48 | 62.07 | 55.39 | 45.77 | 40.76 | 52.91 | |||||||||||||
| 1984 | 40.82 | 43.41 | 48.11 | 48.12 | 56.05 | 61.47 | 72.05 | 68.24 | 61.95 | 51.32 | a | 43.67 | 37.47 | 52.72 | ||||||||||||
| 1985 | 38.31 | 43.50 | 43.35 | 53.88 | 54.92 | 65.88 | 71.95 | 66.92 | 59.67 | 53.29 | 39.35 | 37.10 | 52.34 | |||||||||||||
| 1986 | 44.27 | 47.05 | 51.42 | 50.27 | 56.85 | 66.28 | 67.98 | 73.39 | 59.65 | 55.52 | 47.18 | 40.35 | 55.02 | |||||||||||||
| 1987 | 39.58 | 43.91 | 46.63 | 54.68 | 59.45 | 67.10 | 66.16 | 71.40 | 62.12 | 58.03 | 47.12 | 39.69 | 54.66 | |||||||||||||
| 1988 | 39.92 | 45.53 | 46.69 | 52.20 | 54.63 | 62.15 | 71.87 | 71.10 | 65.37 | 59.19 | 45.55 | 38.55 | 54.40 | |||||||||||||
| 1989 | 39.19 | 37.43 | 46.05 | 55.32 | 56.61 | 64.40 | 65.95 | 68.98 | 64.27 | 53.47 | 45.13 | 38.76 | 52.96 | |||||||||||||
| 1990 | 41.56 | 40.75 | 48.58 | 55.83 | 55.87 | 62.18 | 72.45 | 69.58 | 65.73 | 54.56 | 44.20 | 33.34 | 53.72 | |||||||||||||
| 1991 | 38.55 | 47.98 | 43.92 | 48.82 | 53.84 | 62.17 | 73.31 | 69.82 | 68.67 | 57.84 | 48.58 | 38.90 | 54.37 | |||||||||||||
| 1992 | 41.42 | 47.45 | 51.08 | 54.07 | 63.77 | 66.62 | 71.10 | 71.55 | 64.62 | 56.53 | 45.68 | 38.66 | 56.05 | |||||||||||||
| 1993 | 36.98 | 40.16 | 50.50 | 48.78 | 57.48 | 61.75 | 66.00 | 68.45 | 65.45 | 57.31 | 40.83 | 39.15 | 52.74 | |||||||||||||
| 1994 | 42.65 | 43.36 | 49.73 | 52.58 | 59.27 | 62.35 | 73.53 | 67.34 | 65.85 | 53.61 | 39.75 | 39.90 | 54.16 | |||||||||||||
| 1995 | 44.05 | 48.68 | 45.47 | 49.70 | 57.87 | 61.83 | 69.89 | 67.82 | 66.38 | 56.18 | 50.82 | 45.26 | 55.33 | |||||||||||||
| 1996 | 41.74 | 46.45 | 48.06 | 51.88 | 55.52 | 64.08 | 74.74 | 71.18 | 63.22 | 55.05 | 47.27 | 42.52 | 55.14 | |||||||||||||
| 1997 | 40.37 | 44.23 | 47.81 | 51.63 | 61.47 | 62.60 | 71.44 | 70.13 | 64.13 | 54.05 | 47.72 | 38.13 | 54.48 | |||||||||||||
| 1998 | 43.81 | 42.25 | 47.16 | 50.93 | 53.73 | 64.03 | 72.95 | 73.06 | 67.83 | 52.82 | 45.85 | 38.52 | 54.41 | |||||||||||||
| 1999 | 40.27 | 40.75 | 43.97 | 50.37 | 56.32 | 63.25 | 69.34 | 69.77 | 66.60 | 56.31 | 49.42 | 39.26 | 53.80 | |||||||||||||
| 2000 | 40.13 | 45.50 | 46.02 | 54.28 | 57.47 | 67.37 | 69.89 | 70.32 | 65.60 | 54.98 | 41.97 | 40.05 | 54.46 | |||||||||||||
| 2001 | 40.00 | 42.52 | 49.05 | 48.55 | 62.95 | 63.07 | 71.73 | 71.03 | 66.53 | 56.39 | 46.77 | 41.45 | 55.00 | |||||||||||||
| 2002 | 41.65 | 46.39 | 45.73 | 54.17 | 57.23 | 66.23 | 74.29 | 69.69 | 65.58 | 54.29 | 46.50 | 42.37 | 55.34 | |||||||||||||
| 2003 | 48.16 | 43.75 | 49.23 | 47.15 | 57.82 | 68.03 | 74.40 | 71.73 | 68.65 | 58.35 | 44.40 | 42.74 | 56.20 | |||||||||||||
| 2004 | 41.71 | 44.36 | 51.56 | 54.40 | 58.29 | 66.28 | 73.13 | 73.06 | 64.08 | 55.53 | 45.30 | 44.10 | 55.98 | |||||||||||||
| 2005 | 38.52 | 44.88 | 50.21 | 50.52 | 59.10 | 62.17 | 73.87 | 73.60 | 63.25 | 55.15 | 43.85 | 41.26 | 54.70 | |||||||||||||
| 2006 | 43.18 | 44.62 | 42.18 | 51.82 | 60.11 | 68.23 | 75.35 | 71.73 | 65.17 | 53.88 | a | 46.97 | 40.34 | 55.30 | ||||||||||||
| 2007 | 37.05 | 42.21 | 51.20 | u | 52.07 | 60.58 | 65.13 | 74.89 | 72.22 | a | 65.35 | 53.44 | 46.72 | 40.18 | 55.44 | |||||||||||
| 2008 | 38.48 | 43.48 | 45.74 | 49.78 | 60.98 | h | 66.98 | 74.47 | 72.73 | 68.92 | 54.92 | 47.94 | m | 36.87 | h | 57.28 | ||||||||||
| 2009 | 38.82 | 42.11 | 45.84 | 52.92 | 61.84 | 66.33 | 73.82 | 69.97 | 65.98 | ----- | z | 43.60 | 35.74 | 54.27 | ||||||||||||
| 2010 | 45.02 | 46.05 | 47.55 | 50.48 | 54.35 | e | 64.25 | 74.98 | 72.32 | 65.47 | 55.98 | 45.48 | 42.34 | 55.36 | ||||||||||||
| 2011 | 40.90 | 41.10 | b | 45.71 | c | 49.29 | a | 54.53 | 64.37 | 71.42 | g | 73.15 | 69.00 | 55.40 | a | 44.22 | 36.19 | 52.17 | ||||||||
| 2012 | 40.08 | 42.55 | 43.69 | 52.35 | 59.35 | 63.33 | a | 71.95 | b | 72.97 | b | 66.98 | b | 56.19 | 47.75 | 39.24 | 54.70 | |||||||||
| 2013 | 36.34 | 42.21 | 46.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.84 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.00 | 43.56 | 46.57 | 50.52 | 57.32 | 64.00 | 70.58 | 69.61 | 64.24 | 54.63 | 45.11 | 39.74 | 53.81 | |||||||||||||
| S.D. | 2.65 | 2.52 | 2.52 | 2.77 | 2.58 | 2.27 | 2.90 | 2.39 | 2.59 | 2.09 | 2.27 | 2.55 | 1.23 | |||||||||||||
| SKEW | 0.51 | 0.16 | 0.31 | -0.17 | 0.28 | 0.07 | -0.19 | 0.04 | -0.19 | -0.15 | -0.27 | -0.16 | 0.12 | |||||||||||||
| MAX | 48.16 | 49.16 | 51.56 | 55.83 | 63.77 | 68.23 | 75.35 | 73.60 | 69.00 | 59.19 | 50.82 | 45.26 | 56.20 | |||||||||||||
| MIN | 34.39 | 37.43 | 42.18 | 44.23 | 51.15 | 58.55 | 64.42 | 65.55 | 58.92 | 49.60 | 39.35 | 33.34 | 51.20 | |||||||||||||
| NO YRS | 51 | 51 | 50 | 51 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 50 | 44 | |||||||||||||