| 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 | 45.25 | j | 35.90 | 35.90 | ||
| 1950 | 34.19 | 38.93 | 40.19 | 39.90 | 41.81 | 49.70 | 49.68 | 52.00 | 48.80 | 49.35 | 45.27 | 45.90 | 44.64 | |||||||||||||
| 1951 | 38.87 | 39.50 | 36.00 | 43.30 | 45.58 | 47.90 | 51.54 | c | 50.10 | 50.53 | 47.39 | 42.87 | 37.74 | 44.28 | ||||||||||||
| 1952 | 37.16 | 38.72 | 37.52 | 42.33 | 44.90 | 48.47 | 52.10 | 50.94 | 49.60 | 48.29 | 37.90 | 40.52 | 44.04 | |||||||||||||
| 1953 | 44.19 | 38.95 | h | 38.55 | 42.13 | 44.45 | 47.03 | 50.68 | 53.71 | 53.43 | 45.16 | 46.37 | 40.39 | 46.01 | ||||||||||||
| 1954 | 39.55 | 40.43 | 39.26 | 43.30 | 44.90 | 48.27 | 51.03 | 51.74 | 50.17 | 45.13 | 44.93 | 38.63 | a | 44.78 | ||||||||||||
| 1955 | 35.68 | 35.29 | 37.52 | 38.93 | 43.19 | 47.50 | 50.42 | 49.81 | 48.20 | 46.55 | 42.47 | 42.89 | c | 43.20 | ||||||||||||
| 1956 | 41.68 | 35.41 | 39.48 | 43.67 | 46.58 | 48.03 | 50.77 | 51.16 | 48.20 | 44.52 | 39.43 | 36.42 | 43.78 | |||||||||||||
| 1957 | 34.00 | 41.57 | 43.40 | a | 42.87 | 47.87 | 50.33 | 51.84 | 52.17 | a | 51.70 | 47.00 | 39.97 | 40.94 | 45.30 | |||||||||||
| 1958 | 41.48 | 45.11 | 38.16 | 42.60 | 48.45 | 52.67 | 54.71 | 53.61 | 49.47 | 46.90 | 45.03 | 43.97 | 46.85 | |||||||||||||
| 1959 | 41.00 | 38.07 | 39.90 | 42.67 | 43.57 | a | 49.23 | 50.45 | 49.90 | 49.47 | 47.45 | 39.47 | 36.16 | 43.95 | ||||||||||||
| 1960 | 39.42 | 38.21 | 43.19 | 42.83 | 45.94 | 48.97 | 49.94 | 49.74 | 48.23 | 46.19 | 41.90 | 38.29 | 44.40 | |||||||||||||
| 1961 | 38.97 | 41.61 | 40.77 | 40.87 | 46.03 | 50.53 | 50.87 | 53.26 | 47.87 | 45.26 | 40.97 | 38.74 | 44.65 | |||||||||||||
| 1962 | 34.55 | 40.00 | 40.45 | 43.17 | 43.68 | 45.43 | 48.58 | 53.26 | 52.40 | 46.67 | a | 45.57 | 39.94 | 44.47 | ||||||||||||
| 1963 | 31.87 | 46.93 | 39.03 | 42.27 | 47.26 | 47.97 | 50.19 | 51.84 | 52.53 | 48.85 | d | 44.10 | 40.13 | a | 45.25 | |||||||||||
| 1964 | 38.00 | 35.17 | 37.68 | 40.00 | 44.48 | 49.37 | 52.42 | 51.84 | 47.10 | 48.29 | 41.53 | ----- | z | 44.17 | ||||||||||||
| 1965 | ----- | z | 37.60 | m | 39.45 | 44.37 | 43.83 | a | 47.47 | 50.55 | 55.00 | 47.32 | b | 48.53 | a | 47.07 | 36.45 | 46.00 | ||||||||
| 1966 | 37.71 | 37.50 | 41.13 | 44.13 | 44.26 | 47.80 | 51.00 | 51.23 | 51.63 | 47.35 | 44.73 | 40.87 | 44.95 | |||||||||||||
| 1967 | 38.62 | b | 37.68 | 38.71 | 38.20 | 45.29 | 50.10 | 52.65 | 52.68 | 52.67 | c | 47.32 | 44.57 | 35.29 | 44.48 | |||||||||||
| 1968 | 37.00 | 45.14 | 41.77 | 39.40 | 45.58 | 49.23 | 52.16 | 53.87 | 51.50 | 46.16 | 43.37 | 37.77 | 45.25 | |||||||||||||
| 1969 | 36.03 | 37.11 | 37.81 | 41.27 | 48.16 | 52.50 | 51.17 | a | 49.97 | 50.43 | 45.35 | 40.77 | 41.19 | 44.31 | ||||||||||||
| 1970 | 43.10 | 40.54 | 40.16 | 37.66 | a | 45.03 | 50.13 | 51.30 | a | 50.74 | 46.10 | 44.00 | 45.13 | 37.77 | 44.31 | |||||||||||
| 1971 | 36.87 | 37.57 | 38.77 | 39.87 | 44.45 | 49.00 | 51.13 | a | 54.94 | 49.60 | 42.23 | 40.77 | 35.55 | 43.40 | ||||||||||||
| 1972 | 35.53 | a | 40.59 | 43.10 | 39.63 | 45.39 | 49.07 | a | 52.94 | 51.68 | 47.77 | 44.83 | a | 41.77 | 34.84 | 43.93 | ||||||||||
| 1973 | 36.63 | a | 39.75 | 37.13 | 39.97 | a | 45.45 | 48.13 | 49.13 | 49.58 | 50.00 | 43.81 | 43.43 | 41.94 | 43.75 | |||||||||||
| 1974 | 35.17 | a | 36.32 | 41.68 | 41.07 | 42.29 | 47.50 | 50.81 | 51.26 | 48.23 | 40.81 | 39.87 | 38.23 | 42.77 | ||||||||||||
| 1975 | 35.90 | 37.82 | 38.00 | 36.37 | 43.03 | 47.70 | 52.37 | a | 50.23 | a | 49.97 | 45.03 | 38.87 | 39.71 | 42.92 | |||||||||||
| 1976 | 38.00 | 36.83 | 36.48 | 39.11 | b | 43.39 | 46.17 | 52.06 | 53.35 | 50.43 | 45.97 | 43.50 | 33.74 | 43.25 | ||||||||||||
| 1977 | 34.23 | a | 40.07 | 36.35 | 40.14 | b | 43.87 | a | 50.20 | 49.94 | 55.00 | 52.03 | 47.77 | 42.33 | 43.39 | 44.61 | ||||||||||
| 1978 | 43.70 | a | 42.71 | 44.42 | 42.67 | 45.35 | 51.13 | 52.45 | 52.19 | 50.97 | 48.00 | 37.37 | 32.97 | 45.33 | ||||||||||||
| 1979 | 35.16 | 40.89 | 42.55 | 42.67 | 46.23 | a | 47.63 | 53.13 | 53.48 | 54.13 | 51.16 | 42.13 | 39.81 | 45.75 | ||||||||||||
| 1980 | 38.55 | 44.31 | 39.13 | a | 43.67 | 45.77 | 49.10 | 52.74 | 50.19 | 50.13 | 46.29 | 42.77 | 41.26 | 45.33 | ||||||||||||
| 1981 | 42.77 | 40.68 | 41.13 | 43.63 | 46.77 | 50.17 | 50.58 | 52.65 | 50.37 | 45.84 | 44.83 | 44.42 | 46.15 | |||||||||||||
| 1982 | 35.35 | 38.61 | 39.35 | 39.90 | 43.39 | 50.20 | 52.32 | 52.61 | 48.77 | 46.71 | 41.17 | 39.65 | 44.00 | |||||||||||||
| 1983 | 40.84 | 45.21 | 44.48 | 40.87 | 46.71 | 49.53 | 53.32 | 54.81 | 51.63 | 48.84 | 44.40 | 42.61 | 46.94 | |||||||||||||
| 1984 | 39.10 | 40.62 | 42.97 | 41.13 | 45.16 | 48.40 | 50.84 | 53.29 | 47.77 | 45.94 | 43.13 | 36.55 | 44.57 | |||||||||||||
| 1985 | 35.52 | 37.29 | 37.65 | 44.33 | 44.71 | 50.30 | 53.10 | 52.39 | 50.10 | 46.06 | 38.77 | 37.06 | 43.94 | |||||||||||||
| 1986 | 43.87 | 45.04 | 44.52 | 42.53 | 45.48 | 52.47 | 51.48 | 52.65 | 49.27 | 47.52 | 42.70 | 39.23 | 46.40 | |||||||||||||
| 1987 | 38.39 | 40.00 | 41.90 | 44.00 | 48.94 | 50.67 | 52.10 | k | 51.84 | 49.37 | 48.84 | 43.90 | 39.13 | 45.18 | ||||||||||||
| 1988 | 39.87 | 39.55 | 38.97 | 44.60 | 46.00 | 50.73 | 52.77 | 52.74 | 49.33 | 50.58 | 45.57 | 38.23 | 45.75 | |||||||||||||
| 1989 | 37.35 | 34.79 | 44.32 | 46.77 | 48.52 | 52.17 | 53.45 | 54.32 | 50.40 | 45.97 | 43.07 | 38.19 | 45.78 | |||||||||||||
| 1990 | 40.81 | 37.79 | ----- | z | 47.10 | 47.39 | 51.43 | 55.42 | 56.29 | 54.93 | 45.61 | 40.77 | 32.16 | 46.34 | ||||||||||||
| 1991 | 37.32 | 43.32 | 39.16 | 42.87 | 46.55 | 48.87 | 53.74 | 55.94 | 52.07 | 47.65 | 44.57 | 37.94 | 45.83 | |||||||||||||
| 1992 | 39.97 | 42.89 | k | 44.61 | 46.60 | 48.58 | 51.83 | 55.03 | 52.68 | 49.30 | 47.55 | 42.17 | 37.26 | 46.87 | ||||||||||||
| 1993 | 37.84 | 38.96 | 47.39 | 45.47 | 49.03 | 49.17 | 50.39 | 52.65 | 48.20 | 46.26 | 35.13 | 36.45 | 44.74 | |||||||||||||
| 1994 | 37.97 | 37.18 | 38.13 | 42.93 | 47.13 | 48.10 | 50.03 | 51.32 | 49.57 | 42.52 | 35.70 | 36.74 | 43.11 | |||||||||||||
| 1995 | 43.68 | 41.93 | 40.00 | 40.70 | 47.00 | 48.00 | 53.84 | 49.55 | 51.90 | 44.16 | 45.80 | 43.06 | 45.80 | |||||||||||||
| 1996 | 40.16 | 42.31 | 38.94 | 43.50 | 44.10 | 47.73 | 51.48 | 50.77 | 47.30 | 45.19 | 41.52 | a | 41.48 | 44.54 | ||||||||||||
| 1997 | 37.77 | 36.93 | 40.23 | 42.77 | 48.35 | 49.63 | 51.90 | 53.26 | 52.47 | 45.87 | 44.67 | 35.48 | 44.94 | |||||||||||||
| 1998 | 43.39 | 41.00 | 40.94 | 40.50 | 45.81 | 50.23 | 53.19 | 52.35 | 49.40 | 42.19 | 42.67 | 35.29 | 44.75 | |||||||||||||
| 1999 | 36.94 | 38.50 | 37.55 | 37.97 | 43.68 | 48.43 | 51.90 | 55.48 | 48.50 | 44.32 | 46.60 | 38.00 | 43.99 | |||||||||||||
| 2000 | 40.42 | 44.14 | 39.45 | 45.53 | 47.77 | 51.00 | 54.42 | 52.52 | 51.67 | 45.84 | 39.50 | 39.42 | 45.97 | |||||||||||||
| 2001 | 36.39 | 37.54 | 42.45 | 41.57 | 46.65 | 49.17 | 52.65 | 54.55 | 50.60 | 46.61 | 44.13 | 40.87 | 45.26 | |||||||||||||
| 2002 | 39.03 | 40.43 | 38.13 | 43.93 | 44.45 | 50.83 | 53.81 | 49.52 | 47.43 | 40.39 | 40.47 | 39.70 | a | 44.01 | ||||||||||||
| 2003 | 40.83 | a | 29.89 | 34.35 | 34.20 | 33.90 | a | 39.17 | 40.90 | 40.97 | 38.23 | 37.84 | 33.31 | a | 35.87 | 36.62 | ||||||||||
| 2004 | ----- | z | 33.00 | s | ----- | z | 43.87 | 45.72 | b | 48.83 | 50.84 | 53.84 | 47.60 | 45.23 | 36.40 | 37.58 | e | 45.54 | ||||||||
| 2005 | 37.39 | 36.29 | 41.03 | ----- | z | ----- | z | ----- | z | 52.64 | f | 48.25 | w | ----- | z | ----- | z | ----- | z | ----- | z | 38.24 | ||||
| 2006 | ----- | z | 36.18 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.00 | i | 41.37 | ----- | z | 41.37 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.44 | 39.57 | 40.10 | 41.97 | 45.42 | 49.12 | 51.63 | 52.17 | 49.76 | 46.02 | 42.12 | 38.72 | 44.52 | |||||||||||||
| S.D. | 2.89 | 3.23 | 2.62 | 2.56 | 2.36 | 2.09 | 2.11 | 2.33 | 2.48 | 2.42 | 3.01 | 2.92 | 1.53 | |||||||||||||
| SKEW | 0.21 | -0.01 | 0.47 | -0.49 | -1.97 | -1.80 | -2.24 | -1.86 | -1.56 | -0.86 | -0.79 | 0.16 | -2.78 | |||||||||||||
| MAX | 44.19 | 46.93 | 47.39 | 47.10 | 49.03 | 52.67 | 55.42 | 56.29 | 54.93 | 51.16 | 47.07 | 45.90 | 46.94 | |||||||||||||
| MIN | 31.87 | 29.89 | 34.35 | 34.20 | 33.90 | 39.17 | 40.90 | 40.97 | 38.23 | 37.84 | 33.31 | 32.16 | 36.62 | |||||||||||||
| NO YRS | 54 | 52 | 54 | 55 | 55 | 55 | 54 | 55 | 55 | 55 | 56 | 55 | 48 | |||||||||||||