| 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 | 54.78 | j | 43.68 | 43.68 | ||
| 1950 | 40.15 | 46.71 | 47.70 | a | 49.57 | 52.00 | 56.55 | 59.11 | 59.61 | 57.28 | 56.81 | 53.72 | 51.58 | 52.57 | ||||||||||||
| 1951 | 45.37 | 47.45 | 45.90 | 50.22 | 54.35 | 56.30 | 58.11 | c | 57.42 | 57.67 | 56.06 | 51.13 | 44.95 | 52.08 | ||||||||||||
| 1952 | 42.92 | 46.78 | 45.29 | 49.98 | 53.82 | 55.53 | 59.00 | 57.79 | 57.93 | 56.00 | 48.87 | 45.85 | 51.65 | |||||||||||||
| 1953 | 50.08 | 47.95 | h | 47.10 | 49.68 | 52.48 | 56.07 | 58.85 | 60.53 | 60.83 | 55.58 | 52.83 | 47.87 | 53.81 | ||||||||||||
| 1954 | 45.95 | 49.50 | 47.84 | 51.80 | 53.63 | a | 55.88 | 58.03 | 58.85 | 58.72 | 55.37 | 52.75 | 46.32 | a | 52.89 | |||||||||||
| 1955 | 43.87 | 44.36 | 46.97 | 46.72 | 52.50 | 56.70 | 57.65 | 56.73 | 57.20 | 54.08 | 49.42 | 48.71 | c | 51.24 | ||||||||||||
| 1956 | 47.32 | 43.78 | 47.66 | 51.17 | 54.71 | 57.17 | 58.82 | 59.85 | 57.88 | 53.82 | 49.75 | 45.71 | 52.30 | |||||||||||||
| 1957 | 42.02 | 48.82 | 49.30 | a | 51.42 | 55.08 | 58.63 | 59.40 | 59.93 | a | 60.55 | 55.97 | 49.83 | 47.97 | 53.24 | |||||||||||
| 1958 | 49.23 | 52.00 | 47.13 | 51.23 | 56.48 | 60.60 | 60.56 | 60.74 | 61.57 | 55.71 | 52.27 | 51.48 | 54.92 | |||||||||||||
| 1959 | 48.23 | 46.54 | 49.06 | 51.80 | 52.90 | a | 57.36 | a | 59.00 | 58.48 | 58.98 | 57.32 | 50.55 | 46.05 | 53.02 | |||||||||||
| 1960 | 46.61 | 47.24 | 49.63 | 50.75 | 53.47 | 59.70 | 57.95 | 59.06 | 56.27 | 55.05 | 49.85 | 47.40 | 52.75 | |||||||||||||
| 1961 | 48.85 | 49.45 | 48.40 | 50.47 | 53.13 | 58.65 | 58.66 | 60.06 | 58.30 | 54.35 | 48.95 | 46.10 | 52.95 | |||||||||||||
| 1962 | 44.85 | 47.25 | 47.60 | 51.25 | 52.16 | 55.10 | 57.60 | 60.00 | 58.88 | 55.53 | a | 52.78 | 48.94 | 52.66 | ||||||||||||
| 1963 | 43.27 | 54.36 | 47.55 | 49.57 | 54.50 | 57.00 | 59.61 | 59.37 | 60.77 | 56.81 | d | 51.58 | 48.67 | b | 53.59 | |||||||||||
| 1964 | 45.24 | 47.00 | 46.02 | 48.80 | 52.31 | 56.90 | 59.69 | 60.39 | 58.17 | 57.05 | 49.13 | ----- | z | 52.79 | ||||||||||||
| 1965 | ----- | z | 46.07 | m | 48.34 | 51.25 | 51.87 | a | 54.55 | 57.24 | 61.48 | 55.86 | b | 57.38 | a | 53.95 | 44.45 | 53.64 | ||||||||
| 1966 | 45.40 | 45.61 | 47.82 | 52.57 | 52.82 | 56.77 | 57.87 | 58.66 | 60.55 | 55.26 | 51.70 | 48.29 | 52.78 | |||||||||||||
| 1967 | 46.07 | b | 47.16 | 46.48 | 46.13 | 53.42 | 56.62 | 59.35 | 59.26 | 60.62 | e | 57.21 | 52.92 | 44.08 | 52.44 | |||||||||||
| 1968 | 45.44 | 52.26 | 50.21 | 49.17 | 53.35 | 57.30 | 58.82 | 61.18 | 59.63 | 54.23 | 50.57 | 44.53 | 53.06 | |||||||||||||
| 1969 | 42.26 | 44.55 | 48.18 | 49.28 | 55.66 | 58.17 | 58.57 | a | 58.08 | 58.27 | 55.56 | 51.70 | 49.02 | 52.44 | ||||||||||||
| 1970 | 49.58 | 51.68 | 49.76 | 46.98 | a | 54.24 | 56.77 | 57.87 | a | 57.60 | 57.42 | 53.02 | 52.38 | 44.76 | 52.67 | |||||||||||
| 1971 | 44.98 | 46.36 | 46.40 | 47.30 | 51.95 | 55.48 | 57.78 | a | 61.32 | 58.27 | 51.31 | 48.92 | 43.03 | 51.09 | ||||||||||||
| 1972 | 43.23 | a | 48.09 | 50.56 | 48.67 | 52.48 | 56.33 | a | 59.26 | 59.84 | 56.43 | 55.38 | a | 50.27 | 42.58 | 51.93 | ||||||||||
| 1973 | 44.65 | a | 49.23 | 45.98 | 51.36 | a | 53.08 | 57.10 | 57.55 | a | 56.63 | 58.88 | 52.89 | 48.80 | 48.76 | 52.08 | ||||||||||
| 1974 | 44.40 | a | 44.73 | 49.15 | 49.72 | 51.23 | 55.70 | 58.94 | 59.10 | 56.65 | 53.71 | 50.48 | 45.77 | 51.63 | ||||||||||||
| 1975 | 45.52 | 45.93 | 46.61 | 45.77 | 52.74 | 56.67 | 59.30 | a | 57.83 | a | 56.72 | 53.11 | 47.38 | 47.69 | 51.27 | |||||||||||
| 1976 | 46.60 | 45.24 | 45.37 | 47.82 | b | 52.61 | 55.38 | 59.44 | 59.39 | 58.58 | 55.44 | 52.58 | 45.69 | 52.01 | ||||||||||||
| 1977 | 46.19 | b | 49.98 | 45.81 | 49.71 | b | 51.88 | a | 57.42 | 58.03 | 60.34 | 58.67 | 55.00 | 49.75 | 50.10 | 52.74 | ||||||||||
| 1978 | 50.65 | a | 49.70 | 53.32 | 51.07 | 55.45 | 57.80 | 59.85 | 60.08 | 59.47 | 57.21 | 47.43 | 42.76 | 53.73 | ||||||||||||
| 1979 | 44.34 | 46.71 | 50.18 | 50.83 | 55.30 | a | 56.57 | 60.63 | 61.15 | 63.28 | 57.87 | 50.53 | 49.06 | 53.87 | ||||||||||||
| 1980 | 47.34 | 52.47 | 47.83 | a | 52.73 | 53.18 | 56.52 | 60.08 | 58.24 | 58.77 | 55.95 | 51.28 | 50.10 | 53.71 | ||||||||||||
| 1981 | 51.55 | 49.80 | 49.77 | 51.40 | 54.32 | 58.55 | 58.45 | 59.42 | 58.47 | 54.29 | 52.50 | 49.90 | 54.04 | |||||||||||||
| 1982 | 43.82 | 47.66 | 47.55 | 49.37 | 54.03 | 56.33 | 58.85 | 59.56 | 58.70 | 56.61 | 49.70 | 47.81 | 52.50 | |||||||||||||
| 1983 | 48.95 | 51.21 | 51.48 | 50.15 | 54.45 | 58.00 | 60.37 | 61.85 | 61.32 | 56.98 | 50.95 | 47.79 | 54.46 | |||||||||||||
| 1984 | 48.60 | 48.97 | 51.60 | 49.73 | 53.71 | 56.58 | 59.77 | 60.56 | 58.90 | 53.97 | 49.97 | 45.11 | 53.12 | |||||||||||||
| 1985 | 46.29 | 47.36 | 45.97 | 51.98 | 53.18 | 58.90 | 60.37 | 59.69 | 57.62 | 55.03 | 45.53 | 46.77 | 52.39 | |||||||||||||
| 1986 | 51.66 | 51.02 | 52.56 | 49.90 | 53.06 | 59.20 | 58.98 | 58.79 | 57.03 | 55.32 | 51.95 | 48.42 | 53.99 | |||||||||||||
| 1987 | 47.21 | 49.79 | 50.65 | 52.20 | 56.55 | a | 57.55 | 58.47 | k | 59.13 | 56.75 | 57.19 | 52.37 | 46.73 | 53.28 | |||||||||||
| 1988 | 47.58 | 49.38 | 48.60 | 51.67 | 53.89 | 57.38 | 61.00 | 59.21 | 58.17 | 56.27 | 51.75 | 47.00 | 53.49 | |||||||||||||
| 1989 | 45.29 | 42.89 | 50.34 | 55.27 | 55.89 | 59.47 | 60.21 | 61.44 | 58.37 | 55.23 | 52.83 | 48.84 | 53.84 | |||||||||||||
| 1990 | 47.71 | 45.30 | ----- | z | 53.82 | 55.77 | 58.67 | 62.11 | 62.02 | 62.53 | 55.34 | 49.53 | 41.02 | 53.98 | ||||||||||||
| 1991 | 46.19 | 52.07 | 47.21 | 50.38 | 53.06 | 56.42 | 60.48 | 61.42 | 60.18 | 58.08 | 52.62 | 47.69 | 53.82 | |||||||||||||
| 1992 | 48.79 | 52.81 | k | 52.90 | 55.07 | 57.23 | 58.95 | 61.21 | 59.73 | 58.47 | 57.55 | 50.42 | 44.89 | 55.02 | ||||||||||||
| 1993 | 45.37 | 47.43 | 52.71 | 51.70 | 56.79 | 58.15 | 59.79 | 59.82 | 56.08 | 55.47 | 46.85 | 45.98 | 53.01 | |||||||||||||
| 1994 | 47.40 | 45.20 | 48.84 | 50.87 | 54.00 | 55.53 | 58.27 | 59.85 | 58.25 | 52.95 | 43.52 | 43.81 | 51.54 | |||||||||||||
| 1995 | 49.08 | 49.93 | 48.00 | 49.30 | 53.44 | 55.47 | 60.84 | 58.39 | 59.23 | 54.52 | 52.40 | 49.55 | 53.34 | |||||||||||||
| 1996 | 46.40 | 49.62 | 48.97 | 50.92 | 52.74 | 55.60 | 58.37 | 57.74 | 55.72 | 54.18 | 49.33 | a | 47.48 | 52.26 | ||||||||||||
| 1997 | 45.77 | 46.39 | 48.26 | 50.35 | 56.79 | 57.25 | 59.26 | 60.47 | 61.23 | 54.18 | 51.70 | 45.02 | 53.06 | |||||||||||||
| 1998 | 48.18 | 46.98 | 48.44 | 48.42 | 51.98 | 56.42 | 58.63 | 58.42 | 57.08 | 53.32 | 48.75 | 42.23 | 51.57 | |||||||||||||
| 1999 | 44.82 | 44.52 | 45.13 | 48.13 | 50.73 | 56.05 | 58.13 | 61.39 | 58.00 | 54.21 | c | 53.70 | 46.40 | 51.77 | ||||||||||||
| 2000 | 47.18 | 50.57 | 48.39 | 53.12 | 55.02 | 59.30 | 59.71 | 59.31 | 61.07 | 54.34 | 47.62 | 48.47 | 53.67 | |||||||||||||
| 2001 | 46.39 | 46.46 | 50.32 | 48.82 | 56.05 | 56.77 | 58.53 | 60.16 | 57.63 | 55.82 | 51.17 | 47.44 | 52.96 | |||||||||||||
| 2002 | 46.37 | 49.46 | 47.40 | 51.83 | 52.77 | 57.55 | 60.60 | 57.76 | 57.45 | 51.89 | 51.05 | 47.77 | a | 52.66 | ||||||||||||
| 2003 | 48.33 | b | 40.11 | 41.48 | 40.20 | 43.41 | c | 48.28 | 48.79 | 50.44 | 49.93 | 48.15 | 41.64 | a | 41.50 | 45.19 | ||||||||||
| 2004 | ----- | z | 38.94 | t | ----- | z | 53.82 | 54.97 | b | 57.15 | 60.52 | 62.56 | 58.22 | 55.23 | 48.47 | 46.88 | e | 55.31 | ||||||||
| 2005 | 46.45 | 48.89 | 51.47 | ----- | z | ----- | z | ----- | z | 62.08 | g | 60.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | 48.94 | ||||
| 2006 | ----- | z | 46.73 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.09 | i | 48.75 | ----- | z | 48.75 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.41 | 47.92 | 48.39 | 50.24 | 53.61 | 56.96 | 59.00 | 59.42 | 58.46 | 55.13 | 50.34 | 46.66 | 52.62 | |||||||||||||
| S.D. | 2.37 | 2.76 | 2.26 | 2.43 | 2.08 | 1.76 | 1.78 | 1.83 | 2.05 | 1.79 | 2.40 | 2.43 | 1.40 | |||||||||||||
| SKEW | -0.02 | -0.15 | -0.02 | -1.17 | -1.88 | -1.88 | -3.37 | -2.05 | -0.84 | -1.12 | -1.26 | -0.29 | -3.07 | |||||||||||||
| MAX | 51.66 | 54.36 | 53.32 | 55.27 | 57.23 | 60.60 | 62.11 | 62.56 | 63.28 | 58.08 | 53.95 | 51.58 | 54.92 | |||||||||||||
| MIN | 40.15 | 40.11 | 41.48 | 40.20 | 43.41 | 48.28 | 48.79 | 50.44 | 49.93 | 48.15 | 41.64 | 41.02 | 45.19 | |||||||||||||
| NO YRS | 54 | 52 | 54 | 55 | 55 | 55 | 54 | 55 | 55 | 55 | 56 | 55 | 48 | |||||||||||||