| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1950 | ----- | z | ----- | z | ----- | z | 47.20 | t | 53.13 | 60.29 | a | 65.82 | 67.58 | 61.65 | 53.53 | a | 47.17 | 47.24 | 57.05 | |||||||
| 1951 | 39.82 | 42.41 | 40.76 | 52.14 | a | 54.76 | 62.15 | 65.35 | 63.82 | 61.88 | 52.65 | 45.88 | 37.98 | 51.63 | ||||||||||||
| 1952 | 37.87 | 42.36 | 42.02 | 49.62 | 53.95 | 56.27 | 64.48 | 64.00 | 62.40 | 56.21 | 38.57 | 40.40 | 50.68 | |||||||||||||
| 1953 | 44.05 | 42.46 | 42.97 | 47.93 | a | 51.40 | 55.20 | 63.66 | 63.89 | 61.27 | 53.33 | a | 50.12 | 42.55 | 51.57 | |||||||||||
| 1954 | 40.88 | a | 44.52 | a | 42.08 | 49.12 | 54.34 | 55.45 | 60.75 | a | 59.52 | 57.17 | a | 49.90 | 48.40 | 39.42 | 50.13 | |||||||||
| 1955 | 37.92 | 38.05 | 39.89 | 43.10 | 51.79 | 59.68 | 61.15 | 62.95 | 59.27 | 53.02 | 43.52 | 42.34 | 49.39 | |||||||||||||
| 1956 | 41.52 | 36.17 | 43.19 | 49.47 | 55.81 | 57.62 | 65.27 | 63.53 | 60.67 | a | 51.21 | 43.05 | a | 40.71 | 50.69 | |||||||||||
| 1957 | 32.40 | 41.41 | 46.42 | 50.37 | 56.44 | 60.73 | 62.68 | a | 62.38 | a | 63.32 | 51.52 | 42.77 | 42.24 | 51.06 | |||||||||||
| 1958 | 42.35 | 48.73 | 43.74 | 48.45 | 59.06 | 61.47 | 68.47 | 68.06 | 60.50 | 53.71 | 46.03 | 46.44 | 53.92 | |||||||||||||
| 1959 | 43.44 | 40.86 | 44.98 | 50.40 | 51.65 | 60.07 | 65.85 | 63.89 | 58.33 | 53.48 | 44.72 | 40.56 | 51.52 | |||||||||||||
| 1960 | 38.79 | 41.79 | 46.48 | 49.63 | 51.92 | 60.25 | 66.19 | 62.42 | 59.92 | 52.70 | a | 44.73 | 39.92 | 51.23 | ||||||||||||
| 1961 | 42.94 | 46.79 | 45.58 | 49.07 | 53.87 | 62.60 | 65.39 | 67.68 | 57.05 | 51.81 | 41.97 | 41.11 | 52.15 | |||||||||||||
| 1962 | 36.31 | 41.61 | 43.00 | 51.45 | 50.53 | 58.67 | 63.81 | 63.32 | 61.40 | 51.97 | 47.05 | 41.35 | 50.87 | |||||||||||||
| 1963 | 33.02 | 48.59 | 44.63 | 45.92 | 54.10 | 58.15 | 60.24 | 63.55 | 63.75 | 53.31 | 46.35 | 41.06 | 51.05 | |||||||||||||
| 1964 | 41.16 | 40.03 | 42.69 | 46.08 | 50.74 | 57.05 | 63.26 | 62.55 | 57.82 | 53.77 | 42.47 | 40.74 | 49.86 | |||||||||||||
| 1965 | 40.39 | 43.04 | 44.92 | 50.37 | 51.13 | 57.72 | 65.03 | 64.94 | 58.13 | 55.34 | 48.23 | 38.92 | 51.51 | |||||||||||||
| 1966 | 40.00 | 40.55 | 44.47 | 50.32 | 53.48 | 59.45 | 63.13 | 64.21 | 62.28 | 52.34 | 45.67 | 43.21 | 51.59 | |||||||||||||
| 1967 | 41.68 | 42.80 | 43.58 | 44.90 | 53.73 | 61.82 | 66.45 | 69.39 | 64.20 | 53.15 | 46.50 | 38.94 | 52.26 | |||||||||||||
| 1968 | 40.47 | 47.29 | 47.50 | 47.05 | 53.42 | 60.23 | 65.13 | 63.35 | 59.93 | 50.98 | 45.88 | a | 39.71 | 51.75 | ||||||||||||
| 1969 | 36.02 | 39.07 | 45.23 | 48.05 | 56.84 | 61.35 | 62.60 | 61.95 | 60.18 | 50.18 | 44.75 | 42.92 | 50.76 | |||||||||||||
| 1970 | 41.98 | 44.66 | 45.45 | 44.88 | 53.39 | 62.43 | 65.63 | 63.94 | 56.75 | 50.29 | 45.27 | 39.73 | 51.20 | |||||||||||||
| 1971 | 38.79 | 41.77 | 41.79 | 46.57 | 53.97 | 56.87 | 64.68 | 66.81 | 58.07 | 49.40 | 43.07 | 38.29 | 50.01 | |||||||||||||
| 1972 | 38.31 | 43.47 | 47.56 | 45.87 | 55.15 | 59.22 | 66.74 | 66.44 | 57.20 | 50.50 | 45.88 | 35.23 | 50.96 | |||||||||||||
| 1973 | 38.47 | 44.04 | 43.35 | a | 48.72 | 55.92 | 60.10 | 65.40 | 62.45 | 60.65 | 51.68 | 43.50 | 43.74 | 51.50 | ||||||||||||
| 1974 | 36.16 | 40.41 | 45.03 | 47.77 | 52.27 | 59.93 | 64.35 | 65.76 | 64.00 | 52.50 | 46.52 | 42.15 | 51.40 | |||||||||||||
| 1975 | 42.21 | 41.62 | 42.55 | 43.93 | 52.85 | a | 58.38 | 65.24 | 61.68 | 62.08 | 52.53 | 43.03 | 42.05 | 50.68 | ||||||||||||
| 1976 | 41.13 | 40.84 | 42.02 | 46.17 | 53.61 | 55.50 | 64.05 | 63.05 | 61.62 | 53.11 | 47.15 | 37.94 | 50.52 | |||||||||||||
| 1977 | 38.19 | 44.75 | 42.56 | 49.23 | 50.35 | 60.05 | 63.00 | 69.10 | 58.67 | 52.84 | 44.32 | 43.21 | 51.36 | |||||||||||||
| 1978 | 42.26 | 42.08 | p | 51.36 | m | 48.10 | 51.26 | 60.97 | 63.66 | 63.81 | 57.63 | 53.65 | 40.02 | 35.94 | 51.73 | |||||||||||
| 1979 | 31.03 | 41.11 | a | 47.60 | a | 48.50 | a | 54.89 | 60.34 | a | 65.67 | a | 63.84 | 62.88 | 56.10 | 42.05 | 42.69 | 51.39 | ||||||||
| 1980 | 37.10 | 44.26 | 44.29 | 50.53 | a | 52.58 | 55.98 | 63.74 | 61.63 | 59.65 | 54.23 | 46.62 | 42.94 | 51.13 | ||||||||||||
| 1981 | 41.85 | 43.43 | 45.81 | 48.70 | 53.37 | 58.75 | 63.05 | b | 66.77 | 61.35 | 51.18 | 46.68 | 42.58 | 51.96 | ||||||||||||
| 1982 | 36.98 | 41.11 | 44.29 | 45.32 | 53.13 | 60.68 | 63.03 | 64.32 | 59.22 | 53.21 | 42.17 | 40.02 | 50.29 | |||||||||||||
| 1983 | 42.56 | 45.55 | 47.40 | 47.72 | 54.97 | 57.28 | 61.60 | 64.19 | 57.83 | 52.42 | 46.05 | 36.66 | 51.19 | |||||||||||||
| 1984 | 40.45 | 43.29 | 47.40 | 46.37 | 53.26 | 56.92 | 64.18 | 63.85 | 59.03 | 49.84 | 43.53 | 37.52 | 50.47 | |||||||||||||
| 1985 | 35.82 | 38.79 | 41.56 | 51.37 | 53.97 | 61.15 | 68.61 | 64.34 | 57.02 | 50.90 | 37.23 | 34.27 | 49.59 | |||||||||||||
| 1986 | 42.73 | 43.87 | a | 49.61 | 48.00 | 54.61 | 63.68 | 62.27 | 68.90 | 57.52 | 53.89 | 45.87 | 38.90 | 52.49 | ||||||||||||
| 1987 | 38.42 | 43.00 | 46.27 | 52.75 | 57.18 | 62.27 | 62.15 | 64.29 | 60.23 | 55.18 | 45.40 | 38.29 | 52.12 | |||||||||||||
| 1988 | 38.42 | 42.55 | a | 44.56 | 49.18 | 52.05 | 58.28 | 64.76 | 63.52 | 59.67 | 55.87 | 44.40 | 38.42 | 50.97 | ||||||||||||
| 1989 | 39.27 | 33.04 | 43.69 | 53.43 | 53.82 | 60.15 | 62.06 | 62.00 | 61.08 | 51.10 | 44.35 | 38.31 | 50.19 | |||||||||||||
| 1990 | 40.60 | 38.88 | 47.68 | 52.25 | 53.00 | 59.02 | 67.39 | 66.68 | 62.93 | 51.13 | 44.77 | 32.31 | 51.38 | |||||||||||||
| 1991 | 37.11 | 47.41 | 42.66 | 47.22 | 51.24 | 56.92 | 66.71 | 67.13 | 63.40 | 53.97 | 46.82 | 39.89 | 51.71 | |||||||||||||
| 1992 | 42.35 | 47.34 | 49.32 | 53.30 | 59.58 | 63.92 | 66.71 | 67.18 | 61.07 | 54.10 | 45.15 | 39.68 | 54.14 | |||||||||||||
| 1993 | 36.95 | 38.84 | 49.21 | 50.43 | 57.90 | 60.30 | 61.79 | 65.34 | 62.53 | 55.98 | 38.97 | 39.95 | 51.52 | |||||||||||||
| 1994 | 43.76 | 42.30 | 48.92 | 53.48 | 58.44 | 59.53 | 68.10 | 65.89 | 64.73 | 52.40 | 41.37 | 42.50 | 53.45 | |||||||||||||
| 1995 | 43.90 | 47.82 | 47.27 | 49.52 | 57.06 | 61.38 | 68.69 | 63.73 | 64.65 | 52.68 | a | 50.03 | 43.39 | 54.18 | ||||||||||||
| 1996 | 41.47 | 44.38 | a | 47.90 | a | 52.95 | 53.74 | 60.72 | 69.27 | 67.40 | 59.07 | a | 53.23 | 47.38 | a | 43.55 | a | 53.42 | ||||||||
| 1997 | 40.73 | a | 43.09 | 47.76 | 49.72 | 60.45 | 60.22 | 65.76 | b | 67.79 | 62.78 | 52.58 | 47.88 | 38.82 | 53.13 | |||||||||||
| 1998 | 45.81 | 45.57 | 46.55 | 51.40 | 53.77 | 61.20 | 70.81 | 68.27 | 63.60 | 53.39 | 47.92 | 38.74 | 53.92 | |||||||||||||
| 1999 | 41.98 | 43.16 | 44.16 | 48.73 | 52.74 | 59.02 | 64.06 | 67.97 | 61.90 | 53.84 | 50.13 | 41.97 | 52.47 | |||||||||||||
| 2000 | 40.18 | 44.86 | 44.61 | 53.47 | 56.50 | 62.47 | 64.82 | 64.73 | a | 61.55 | 53.19 | 42.07 | 41.67 | a | 52.51 | |||||||||||
| 2001 | 41.16 | 40.41 | 46.32 | 48.08 | 58.27 | 58.50 | 65.79 | 67.94 | 62.88 | 53.56 | 49.00 | 42.00 | 52.83 | |||||||||||||
| 2002 | 41.84 | 44.64 | 45.29 | 50.18 | 53.74 | 61.12 | 67.03 | l | 66.69 | 62.82 | 52.18 | 49.10 | 45.21 | 52.07 | ||||||||||||
| 2003 | 48.23 | 44.84 | 49.95 | 50.02 | 56.73 | 64.32 | 70.32 | 69.48 | 64.82 | 57.44 | 44.68 | 44.03 | 55.40 | |||||||||||||
| 2004 | 43.32 | 45.55 | 50.74 | 52.38 | 54.16 | 61.62 | 69.18 | 68.40 | 61.21 | a | 53.92 | 44.43 | 42.60 | 53.96 | ||||||||||||
| 2005 | 41.55 | 41.79 | b | 50.47 | 50.23 | 57.68 | ----- | z | 68.05 | 67.87 | 59.95 | 55.05 | 43.78 | 39.42 | 52.35 | |||||||||||
| 2006 | 44.02 | 41.50 | 44.40 | 50.00 | 55.81 | 62.43 | 68.16 | 63.95 | 59.87 | 50.81 | 45.27 | 40.48 | 52.22 | |||||||||||||
| 2007 | 37.30 | a | 42.34 | 48.60 | 49.00 | 54.05 | 59.20 | 67.15 | 64.21 | 59.30 | 50.44 | 42.43 | 39.63 | 51.14 | ||||||||||||
| 2008 | 36.50 | a | 41.17 | 42.26 | 45.13 | 55.08 | 56.70 | 65.15 | 66.32 | 59.92 | 52.00 | 47.08 | 37.19 | 50.38 | ||||||||||||
| 2009 | 38.27 | 41.09 | 41.92 | 46.55 | 55.18 | 60.42 | 67.56 | 65.03 | 61.45 | 49.98 | 44.20 | 33.71 | 50.45 | |||||||||||||
| 2010 | 44.27 | 44.48 | 44.52 | 46.82 | 50.95 | 57.08 | 63.97 | 64.37 | 60.42 | 52.81 | 44.32 | 42.73 | c | 51.39 | ||||||||||||
| 2011 | 40.94 | 39.46 | 44.47 | 45.17 | 49.46 | g | 57.63 | d | 62.90 | 65.89 | 65.18 | 54.65 | 44.42 | 36.65 | a | 50.67 | ||||||||||
| 2012 | 40.31 | 40.90 | 41.47 | 49.05 | 52.74 | 56.67 | 62.95 | 65.40 | 60.47 | 52.21 | 46.78 | 40.53 | 50.79 | |||||||||||||
| 2013 | 36.42 | 40.65 | d | 45.47 | 54.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.84 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.03 | 42.62 | 45.14 | 48.90 | 54.25 | 59.61 | 65.06 | 65.10 | 60.79 | 52.79 | 45.00 | 40.37 | 51.61 | |||||||||||||
| S.D. | 3.17 | 2.93 | 2.59 | 2.52 | 2.34 | 2.20 | 2.39 | 2.26 | 2.23 | 1.74 | 2.69 | 2.88 | 1.26 | |||||||||||||
| SKEW | -0.38 | -0.30 | 0.27 | -0.08 | 0.60 | -0.09 | 0.30 | 0.13 | 0.01 | 0.27 | -0.47 | -0.35 | 0.83 | |||||||||||||
| MAX | 48.23 | 48.73 | 50.74 | 53.48 | 60.45 | 64.32 | 70.81 | 69.48 | 65.18 | 57.44 | 50.13 | 47.24 | 55.40 | |||||||||||||
| MIN | 31.03 | 33.04 | 39.89 | 43.10 | 50.35 | 55.20 | 60.24 | 59.52 | 56.75 | 49.40 | 37.23 | 32.31 | 49.39 | |||||||||||||
| NO YRS | 63 | 62 | 62 | 62 | 62 | 62 | 62 | 63 | 63 | 63 | 63 | 63 | 58 | |||||||||||||