| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.10 | 57.52 | 57.20 | 54.16 | 48.21 | b | 44.32 | 53.09 | ||||||
| 1949 | 40.27 | a | 43.43 | 46.13 | 51.03 | 53.30 | a | 58.55 | a | 60.52 | b | 59.81 | 59.93 | 54.06 | 52.13 | 44.90 | 52.01 | |||||||||
| 1950 | 41.74 | 45.18 | 46.97 | 51.33 | 52.67 | a | 54.66 | a | 62.13 | 59.29 | 57.20 | 53.94 | 51.17 | 49.42 | 52.14 | |||||||||||
| 1951 | 45.90 | 45.07 | 46.55 | 51.62 | a | 52.16 | 56.73 | 60.26 | 60.03 | 59.47 | 56.61 | 51.50 | d | 46.71 | 52.72 | |||||||||||
| 1952 | 44.03 | 47.24 | 46.39 | 50.13 | 53.52 | 53.93 | 56.58 | 60.34 | b | 59.21 | a | 55.94 | 49.40 | 45.74 | 51.87 | |||||||||||
| 1953 | 48.61 | 46.57 | 45.87 | 49.50 | 51.03 | a | 54.33 | 61.10 | a | 59.21 | c | 57.57 | 55.13 | 51.40 | 46.00 | a | 52.19 | |||||||||
| 1954 | 45.00 | 48.04 | 47.03 | 49.57 | 53.03 | 55.67 | 63.06 | 61.94 | 57.30 | 53.35 | 51.53 | 46.30 | a | 52.65 | ||||||||||||
| 1955 | 42.74 | 43.07 | 47.10 | a | 48.75 | f | 50.27 | a | 54.76 | e | 57.77 | 60.55 | 58.50 | 52.48 | 48.10 | a | 47.23 | 51.14 | ||||||||
| 1956 | 44.55 | 41.17 | 44.48 | 47.10 | 51.55 | 53.27 | 58.03 | 57.90 | 56.17 | 52.35 | 47.90 | 44.84 | 49.94 | |||||||||||||
| 1957 | 42.94 | 46.89 | 46.39 | 47.67 | 51.23 | 55.67 | 57.39 | 59.61 | 55.97 | 53.26 | 47.27 | 45.97 | 50.85 | |||||||||||||
| 1958 | 45.74 | 48.46 | 44.74 | 49.00 | 51.71 | 55.00 | 57.58 | 60.74 | 58.03 | 57.13 | 47.70 | 48.29 | 52.01 | |||||||||||||
| 1959 | 48.35 | 46.71 | 50.48 | 53.50 | 54.74 | 59.40 | 64.29 | 63.42 | 62.13 | 58.26 | 52.97 | 49.61 | 55.32 | |||||||||||||
| 1960 | 44.90 | 46.10 | 49.68 | 51.27 | 54.13 | 57.13 | 60.74 | 61.58 | 61.53 | 56.23 | 49.77 | 45.39 | 53.20 | |||||||||||||
| 1961 | 48.35 | 48.54 | 49.61 | 50.90 | 52.93 | a | 56.60 | 61.48 | 62.32 | 58.13 | 56.29 | 49.87 | 45.10 | 53.34 | ||||||||||||
| 1962 | 45.90 | 47.38 | b | 46.06 | ----- | z | 51.70 | d | 55.83 | 57.55 | b | 59.77 | 57.60 | 54.48 | 51.93 | 47.97 | 52.38 | |||||||||
| 1963 | 45.84 | 50.04 | 47.10 | 49.17 | 55.03 | 56.73 | 58.23 | 61.42 | 64.31 | a | 59.26 | 51.57 | 46.97 | 53.80 | ||||||||||||
| 1964 | 45.32 | 45.17 | 47.03 | 49.37 | 50.84 | 54.97 | 60.32 | 65.71 | 63.67 | 62.59 | b | 52.00 | 51.71 | 54.06 | ||||||||||||
| 1965 | 48.71 | 48.00 | 51.90 | 53.30 | 56.03 | 57.30 | 60.50 | a | ----- | z | 61.47 | 61.00 | ----- | z | 49.35 | 54.76 | ||||||||||
| 1966 | 47.77 | a | 48.46 | 52.35 | 56.90 | ----- | z | 60.60 | 61.74 | 65.32 | 62.67 | 60.29 | 54.80 | 50.87 | 56.53 | |||||||||||
| 1967 | 49.45 | 49.54 | b | 52.42 | 49.70 | 57.10 | 60.13 | 66.55 | 69.77 | 67.87 | 60.39 | 58.97 | a | 50.59 | b | 57.71 | ||||||||||
| 1968 | ----- | z | 50.86 | ----- | z | 56.42 | d | 59.24 | b | 60.37 | 63.19 | 62.71 | 61.53 | 56.74 | 54.63 | 47.55 | 57.33 | |||||||||
| 1969 | 51.97 | 48.14 | 49.16 | 55.63 | 56.87 | 61.00 | ----- | z | 64.65 | 61.73 | 55.45 | ----- | z | 48.45 | 55.31 | |||||||||||
| 1970 | 51.19 | 53.07 | 41.71 | 49.30 | 50.87 | 51.87 | 56.71 | 54.42 | 49.80 | 49.39 | 44.03 | 40.55 | 49.41 | |||||||||||||
| 1971 | 39.68 | 42.39 | 45.32 | 47.03 | 50.87 | 52.67 | 59.19 | 63.29 | 60.23 | 50.77 | 47.50 | 42.10 | 50.09 | |||||||||||||
| 1972 | 42.03 | 45.41 | 49.26 | 48.37 | 53.10 | 58.07 | 60.77 | 61.81 | 58.40 | 56.10 | 48.83 | 44.42 | 52.21 | |||||||||||||
| 1973 | 43.65 | 47.50 | 45.65 | 46.50 | 51.45 | 53.70 | ----- | z | 59.16 | 58.37 | 52.19 | 48.23 | 47.39 | 50.34 | ||||||||||||
| 1974 | 44.55 | 45.29 | 47.32 | 47.97 | 51.71 | 55.97 | 59.03 | 59.58 | 59.93 | a | 54.90 | 49.90 | 44.26 | 51.70 | ||||||||||||
| 1975 | 43.10 | 44.46 | 46.72 | f | 46.12 | v | 51.19 | 54.80 | 57.06 | 58.00 | 59.97 | 54.00 | 49.40 | 43.74 | 51.57 | |||||||||||
| 1976 | 44.58 | 47.03 | 46.61 | 47.57 | 53.48 | 57.20 | 61.10 | 60.16 | 62.13 | 58.68 | 53.47 | 49.58 | 53.47 | |||||||||||||
| 1977 | 48.65 | 49.82 | 48.63 | a | 53.73 | 55.06 | 56.77 | 58.87 | 63.35 | 61.10 | 58.10 | 53.97 | 54.58 | 55.22 | ||||||||||||
| 1978 | 52.94 | 50.89 | 54.58 | 54.37 | 58.32 | 62.00 | 62.32 | 62.71 | 61.63 | 59.58 | 49.97 | 45.13 | 56.20 | |||||||||||||
| 1979 | 47.71 | 45.86 | 50.42 | 52.07 | 57.03 | a | 60.20 | 60.19 | 62.19 | 62.28 | a | 57.90 | b | 52.17 | 49.61 | 54.80 | ||||||||||
| 1980 | 52.29 | 52.28 | 49.94 | 53.90 | 55.87 | 57.37 | 62.93 | a | 61.86 | c | ----- | z | ----- | z | ----- | z | 49.94 | 55.15 | ||||||||
| 1981 | 51.58 | 51.96 | 52.16 | 54.10 | 57.32 | 62.13 | 63.45 | 64.48 | 62.13 | 58.61 | 55.83 | 51.16 | 57.08 | |||||||||||||
| 1982 | 48.77 | 51.64 | 51.32 | 52.77 | 54.77 | 54.93 | 58.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.31 | ||||||||
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1985 | ----- | z | ----- | z | 46.55 | 52.33 | 54.45 | 57.70 | 63.81 | 62.00 | 60.90 | 60.48 | 51.83 | 50.13 | 56.02 | |||||||||||
| 1986 | 53.10 | 51.50 | 52.90 | 54.07 | 56.29 | 58.83 | 60.26 | 62.48 | 58.53 | 57.48 | 55.33 | 51.48 | 56.02 | |||||||||||||
| 1987 | 48.13 | 50.36 | 51.35 | 53.37 | 56.35 | 58.47 | 58.65 | 61.03 | 61.03 | 60.71 | ----- | z | 44.17 | m | 55.94 | |||||||||||
| 1988 | 47.45 | 48.86 | 50.61 | 51.77 | 52.81 | 55.00 | 62.16 | 61.97 | 59.80 | 58.35 | 51.47 | 47.81 | 54.00 | |||||||||||||
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | ----- | z | ----- | z | 9999.00 | |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2006 | ----- | z | ----- | z | ----- | z | 49.86 | b | 56.03 | 59.14 | a | 61.63 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.01 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.60 | 47.63 | 48.38 | 51.17 | 53.84 | 56.91 | 60.31 | 61.41 | 59.88 | 56.40 | 51.02 | 47.44 | 53.23 | |||||||||||||
| S.D. | 3.53 | 2.90 | 2.88 | 2.76 | 2.42 | 2.60 | 2.43 | 2.70 | 2.99 | 3.11 | 2.98 | 2.96 | 2.15 | |||||||||||||
| SKEW | 0.09 | -0.13 | 0.13 | 0.21 | 0.39 | 0.23 | 0.37 | 0.40 | -0.51 | -0.13 | 0.29 | 0.02 | 0.28 | |||||||||||||
| MAX | 53.10 | 53.07 | 54.58 | 56.90 | 59.24 | 62.13 | 66.55 | 69.77 | 67.87 | 62.59 | 58.97 | 54.58 | 57.71 | |||||||||||||
| MIN | 39.68 | 41.17 | 41.71 | 46.50 | 50.27 | 51.87 | 56.58 | 54.42 | 49.80 | 49.39 | 44.03 | 40.55 | 49.41 | |||||||||||||
| NO YRS | 36 | 37 | 36 | 36 | 38 | 39 | 37 | 37 | 37 | 37 | 34 | 37 | 26 | |||||||||||||