| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.50 | h | 9999.00 | |
| 1952 | 39.65 | 43.09 | 44.67 | b | 51.88 | i | 55.76 | 58.95 | 66.90 | 66.25 | a | 64.18 | b | 57.12 | a | 37.74 | a | 41.37 | a | 52.33 | ||||||
| 1953 | 46.07 | b | 42.80 | 44.03 | a | 48.19 | a | 53.56 | 56.27 | 64.22 | b | 65.23 | a | 62.17 | 53.73 | a | 48.38 | 43.45 | b | 52.34 | ||||||
| 1954 | 40.03 | a | 42.67 | b | 43.29 | b | 49.23 | 56.18 | 57.53 | 61.47 | 62.26 | 59.10 | 52.00 | b | 49.20 | 39.87 | 51.07 | |||||||||
| 1955 | 38.32 | 39.83 | a | 41.34 | 45.72 | 52.60 | b | 60.00 | 61.63 | 64.53 | 60.82 | 53.00 | b | 43.60 | d | 40.71 | 50.17 | |||||||||
| 1956 | 41.48 | 36.28 | b | 43.77 | a | 52.02 | a | 58.50 | 58.55 | 67.24 | d | 65.08 | 61.43 | a | 52.23 | a | 41.07 | b | 40.05 | a | 51.48 | |||||
| 1957 | 32.60 | 42.81 | a | 47.05 | a | 51.75 | 57.53 | a | 60.50 | 63.39 | 63.03 | a | 65.78 | 54.13 | 43.80 | 45.27 | a | 52.30 | ||||||||
| 1958 | 43.44 | 50.38 | 45.63 | 51.58 | 60.68 | 64.67 | 70.94 | 69.45 | 61.78 | 55.37 | 46.63 | 45.87 | 55.53 | |||||||||||||
| 1959 | 43.47 | 43.46 | 47.21 | 51.13 | 53.62 | a | 61.47 | 67.94 | 65.27 | 58.13 | 54.19 | 44.02 | 40.73 | 52.55 | ||||||||||||
| 1960 | 37.31 | 42.64 | 46.00 | 51.22 | 53.47 | 62.15 | 68.02 | a | 63.92 | 61.08 | 53.84 | 45.57 | 39.61 | 52.07 | ||||||||||||
| 1961 | 43.97 | 47.09 | 47.15 | 50.57 | 55.69 | 64.75 | 67.29 | 69.52 | 58.90 | 52.50 | a | 42.30 | 41.23 | 53.41 | ||||||||||||
| 1962 | 37.37 | 42.02 | 44.03 | 52.28 | 51.77 | 59.68 | 64.98 | 64.23 | 61.67 | 52.10 | 46.95 | 41.24 | 51.53 | |||||||||||||
| 1963 | 33.68 | 49.11 | 45.06 | 48.05 | 56.77 | 60.57 | 62.58 | 66.06 | 66.00 | 55.40 | 47.80 | 41.55 | 52.72 | |||||||||||||
| 1964 | 42.19 | 41.34 | 44.92 | 48.15 | 53.18 | 59.53 | 65.27 | 64.53 | 59.18 | 54.82 | 42.78 | 40.13 | 51.34 | |||||||||||||
| 1965 | 41.15 | 43.89 | 47.65 | 52.12 | 53.27 | 61.07 | 66.94 | 62.21 | 60.32 | 56.56 | 49.17 | 39.10 | 52.79 | |||||||||||||
| 1966 | 41.00 | 41.95 | 45.68 | 52.12 | 55.81 | 62.07 | 65.23 | 66.29 | 63.32 | 53.58 | 47.27 | 45.24 | 53.29 | |||||||||||||
| 1967 | 44.53 | 44.59 | 44.69 | 46.43 | 55.71 | 64.52 | 67.66 | 71.82 | 65.13 | 54.45 | 46.42 | 41.16 | 53.93 | |||||||||||||
| 1968 | 39.94 | 48.10 | 49.11 | 48.18 | 55.05 | 61.58 | 66.79 | 64.45 | 60.97 | 52.11 | 46.67 | 38.85 | 52.65 | |||||||||||||
| 1969 | 35.31 | 40.57 | 46.74 | 50.03 | 58.44 | 64.20 | 64.06 | 63.13 | 61.88 | 51.23 | 44.80 | 42.68 | 51.92 | |||||||||||||
| 1970 | 41.39 | 45.80 | 47.76 | 46.70 | 55.55 | 63.38 | 66.55 | 65.00 | 58.37 | 52.02 | 46.47 | 40.11 | 52.42 | |||||||||||||
| 1971 | 39.56 | 41.02 | 43.68 | 49.00 | 56.15 | 57.87 | 66.24 | 67.94 | 58.55 | 50.81 | 44.17 | 39.26 | 51.19 | |||||||||||||
| 1972 | 37.74 | 44.02 | 49.66 | b | 46.42 | 57.42 | 60.20 | 67.98 | 68.35 | 58.38 | 51.58 | 47.52 | 36.16 | 52.12 | ||||||||||||
| 1973 | 38.35 | 45.34 | 45.69 | 49.93 | 57.19 | 60.93 | 66.94 | 62.77 | 61.60 | 51.97 | 43.60 | 43.66 | 52.33 | |||||||||||||
| 1974 | 37.55 | 41.12 | 47.15 | 49.88 | 53.65 | 62.15 | 64.68 | 67.27 | 66.63 | 54.47 | 47.53 | 44.39 | 53.04 | |||||||||||||
| 1975 | 42.73 | 43.61 | 44.66 | 46.20 | 55.91 | b | 59.97 | 66.34 | 63.19 | 63.05 | 52.15 | 44.95 | 43.21 | 52.16 | ||||||||||||
| 1976 | 41.73 | 41.36 | 43.94 | 49.10 | 55.84 | 57.63 | 65.15 | 64.71 | 62.38 | 53.15 | 46.03 | 38.21 | 51.60 | |||||||||||||
| 1977 | 38.05 | 44.66 | 44.56 | 52.32 | 52.03 | 62.82 | 65.10 | 70.32 | 59.63 | 54.08 | 44.93 | 43.77 | 52.69 | |||||||||||||
| 1978 | 42.94 | 46.12 | 49.43 | a | 49.68 | 54.69 | 64.55 | a | 67.35 | 67.61 | 59.37 | 54.68 | 40.29 | a | 36.50 | 52.77 | ||||||||||
| 1979 | 31.60 | 41.82 | 48.44 | 50.00 | 55.44 | ----- | z | 66.78 | a | 64.61 | 62.83 | 56.71 | 43.97 | 44.00 | 51.47 | |||||||||||
| 1980 | 36.35 | 43.83 | 45.32 | 51.98 | 53.56 | 57.42 | 64.84 | 62.39 | 61.20 | 54.05 | 47.52 | 42.94 | 51.78 | |||||||||||||
| 1981 | 40.95 | a | 42.98 | 47.08 | 50.52 | 55.31 | 59.27 | 63.81 | 67.27 | 62.72 | j | 50.38 | o | 46.25 | 43.19 | g | 52.60 | |||||||||
| 1982 | 23.86 | x | 44.62 | p | 44.66 | 47.05 | 55.08 | 62.55 | b | 64.31 | 65.11 | 61.05 | 53.48 | 42.50 | 40.69 | 53.65 | ||||||||||
| 1983 | 42.89 | 46.05 | 48.85 | 49.77 | 56.87 | 58.68 | 62.27 | ----- | z | 58.47 | 51.61 | 47.90 | 36.13 | 50.86 | ||||||||||||
| 1984 | 41.39 | 44.59 | 49.19 | 48.13 | 53.21 | 57.48 | 64.31 | 65.26 | 60.15 | 49.95 | 44.37 | 36.94 | 51.25 | |||||||||||||
| 1985 | 33.98 | 38.59 | 43.90 | 51.90 | 55.97 | 61.85 | 69.52 | 65.02 | 58.85 | 52.71 | 37.55 | 33.55 | 50.28 | |||||||||||||
| 1986 | 43.19 | 44.02 | 51.11 | 48.72 | 55.53 | 64.45 | 62.89 | 69.05 | 58.45 | 54.34 | 46.82 | 39.92 | 53.21 | |||||||||||||
| 1987 | 39.50 | 44.84 | 48.06 | 53.03 | 58.79 | 63.27 | 64.44 | 66.27 | 62.82 | 56.92 | 47.55 | 39.08 | 53.71 | |||||||||||||
| 1988 | 38.97 | 42.40 | 46.15 | 50.95 | 53.97 | 60.03 | 66.10 | 64.85 | 61.40 | 56.65 | 47.12 | 39.55 | 52.34 | |||||||||||||
| 1989 | 41.06 | 35.20 | 45.27 | 53.98 | 55.81 | 62.77 | 63.47 | 64.03 | 63.30 | 52.37 | 46.42 | d | 39.16 | 51.90 | ||||||||||||
| 1990 | ----- | z | ----- | z | 47.74 | b | 53.48 | 54.68 | a | 60.72 | 67.97 | 67.60 | 64.40 | 51.71 | 46.88 | 33.48 | 54.87 | |||||||||
| 1991 | ----- | z | 47.46 | 44.69 | 49.27 | 52.81 | ----- | z | 66.68 | ----- | z | ----- | z | 54.45 | 47.60 | 41.08 | a | 50.51 | ||||||||
| 1992 | 43.37 | 47.22 | 50.06 | 54.13 | 59.71 | 65.03 | 67.40 | 67.48 | 60.88 | 55.31 | 45.82 | 39.26 | 54.64 | |||||||||||||
| 1993 | 35.37 | 38.66 | 48.68 | 50.98 | 58.68 | 59.88 | 62.08 | 65.98 | 63.10 | 56.55 | 38.80 | 38.65 | 51.45 | |||||||||||||
| 1994 | 42.69 | 40.91 | 48.94 | 52.27 | 58.05 | 60.05 | 68.02 | 66.32 | 64.83 | 52.58 | 40.80 | 42.13 | 53.13 | |||||||||||||
| 1995 | 43.50 | 46.21 | 47.52 | 49.47 | 57.60 | 60.95 | 68.24 | 64.77 | 64.90 | 52.61 | 50.62 | 42.65 | 54.09 | |||||||||||||
| 1996 | 42.23 | 41.95 | 47.47 | 52.32 | 53.37 | 60.90 | 70.13 | 67.44 | 59.92 | 52.23 | 45.53 | 42.37 | 52.99 | |||||||||||||
| 1997 | 40.82 | 42.52 | 46.44 | 49.63 | 61.31 | 62.32 | 67.24 | 70.13 | 64.35 | 52.24 | 48.85 | 39.85 | 53.81 | |||||||||||||
| 1998 | 44.73 | 46.25 | 47.60 | 50.67 | 54.82 | 61.67 | 69.47 | 67.32 | 63.78 | 52.97 | 47.52 | 39.73 | a | 53.88 | ||||||||||||
| 1999 | 41.31 | 43.41 | 44.55 | a | 49.40 | 53.35 | 59.92 | 64.90 | 67.15 | 62.66 | b | 54.39 | 49.20 | 41.84 | 52.67 | |||||||||||
| 2000 | 40.07 | a | 43.78 | 44.50 | 52.05 | 56.11 | 63.58 | 66.10 | 65.26 | 61.92 | 53.37 | 41.38 | a | 40.38 | a | 52.37 | ||||||||||
| 2001 | 40.26 | 41.14 | 46.50 | 48.71 | a | 57.27 | 59.32 | 65.31 | 66.98 | 62.63 | 53.08 | 48.12 | a | 41.47 | 52.57 | |||||||||||
| 2002 | 41.00 | 42.95 | 43.40 | 51.02 | 54.05 | 62.22 | 68.44 | 66.26 | 62.80 | 52.47 | 46.53 | 43.47 | 52.88 | |||||||||||||
| 2003 | 45.11 | 43.77 | 48.47 | 49.43 | 55.84 | 64.08 | 69.40 | 67.24 | 64.27 | 57.15 | 42.73 | 42.18 | 54.14 | |||||||||||||
| 2004 | 39.97 | 44.31 | 49.44 | 53.77 | 58.35 | 63.47 | 69.63 | 69.40 | 61.15 | 55.89 | 44.85 | 43.06 | 54.44 | |||||||||||||
| 2005 | 41.94 | 42.12 | 50.05 | 51.43 | 60.16 | 61.37 | 69.23 | 69.37 | 61.17 | 56.05 | 44.08 | 39.97 | 53.91 | |||||||||||||
| 2006 | 44.74 | 41.55 | 46.26 | 53.05 | ----- | z | 64.40 | 70.31 | 67.73 | 63.70 | 52.95 | 47.65 | 40.92 | 53.93 | ||||||||||||
| 2007 | 38.66 | 45.50 | 50.79 | 51.77 | 57.29 | 62.85 | 71.05 | 68.65 | 62.57 | 51.08 | 42.98 | 40.34 | 53.63 | |||||||||||||
| 2008 | 36.10 | 42.34 | 43.08 | 46.47 | 56.06 | 57.95 | 65.62 | a | 66.18 | 60.78 | 51.56 | 47.95 | 37.39 | 50.96 | ||||||||||||
| 2009 | 38.18 | 41.00 | 43.23 | 49.02 | 55.97 | 62.57 | 69.40 | 66.23 | 62.57 | 51.48 | 45.58 | 35.03 | 51.69 | |||||||||||||
| 2010 | 45.31 | 45.80 | 46.23 | 48.90 | 53.27 | 58.65 | 65.06 | 66.19 | 61.62 | 52.95 | 44.68 | 43.50 | 52.68 | |||||||||||||
| 2011 | 40.56 | 39.41 | 45.47 | 46.22 | 51.82 | 59.68 | 63.65 | ----- | z | 64.73 | 65.62 | g | 43.72 | 36.81 | 49.21 | |||||||||||
| 2012 | 40.16 | 42.22 | 43.03 | 51.42 | 54.81 | 58.79 | b | 65.72 | a | 67.44 | 62.50 | 54.55 | 47.88 | 42.11 | 52.55 | |||||||||||
| 2013 | 35.35 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.35 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.22 | 43.23 | 46.34 | 50.15 | 55.68 | 61.11 | 66.27 | 66.20 | 61.86 | 53.55 | 45.37 | 40.55 | 52.58 | |||||||||||||
| S.D. | 3.28 | 2.82 | 2.24 | 2.15 | 2.21 | 2.25 | 2.37 | 2.18 | 2.15 | 1.78 | 2.84 | 2.72 | 1.10 | |||||||||||||
| SKEW | -0.57 | -0.15 | 0.16 | -0.25 | 0.40 | -0.06 | 0.00 | 0.24 | 0.08 | 0.40 | -0.83 | -0.50 | 0.22 | |||||||||||||
| MAX | 46.07 | 50.38 | 51.11 | 54.13 | 61.31 | 65.03 | 71.05 | 71.82 | 66.63 | 57.15 | 50.62 | 45.87 | 55.53 | |||||||||||||
| MIN | 31.60 | 35.20 | 41.34 | 45.72 | 51.77 | 56.27 | 61.47 | 62.21 | 58.13 | 49.95 | 37.55 | 33.48 | 50.17 | |||||||||||||
| NO YRS | 59 | 59 | 61 | 60 | 60 | 59 | 61 | 58 | 59 | 59 | 61 | 60 | 52 | |||||||||||||