| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | 36.69 | 41.91 | 41.53 | 49.48 | 49.53 | 56.85 | 61.27 | 61.15 | 59.13 | 51.26 | 45.50 | 40.76 | 49.59 | |||||||||||||
| 1963 | 32.23 | 46.23 | 42.66 | 46.83 | 54.23 | 56.72 | 60.29 | 62.50 | 61.72 | 51.94 | 44.38 | 39.58 | 49.94 | |||||||||||||
| 1964 | 39.87 | 39.86 | 42.55 | 44.85 | 51.13 | ----- | z | ----- | z | 60.11 | 56.05 | 50.98 | 40.62 | 35.55 | 46.16 | |||||||||||
| 1965 | 39.40 | 41.80 | 44.35 | 48.38 | 50.84 | 57.52 | ----- | z | 64.61 | 57.38 | 55.05 | 47.28 | 38.39 | 49.55 | ||||||||||||
| 1966 | 38.87 | 40.79 | 44.31 | 51.10 | 54.66 | 58.03 | 61.98 | 62.94 | 61.73 | 52.00 | 46.05 | 42.94 | 51.28 | |||||||||||||
| 1967 | 41.65 | 42.39 | 41.79 | 45.57 | 54.52 | 63.77 | 63.98 | 68.92 | 63.68 | 53.08 | 45.05 | 39.52 | 51.99 | |||||||||||||
| 1968 | 39.32 | 45.64 | 47.85 | 47.98 | 54.71 | 59.27 | 65.58 | 62.03 | 59.68 | 50.40 | 44.80 | 36.52 | 51.15 | |||||||||||||
| 1969 | 31.37 | 38.55 | 45.21 | 48.87 | 57.55 | 64.53 | 62.77 | 60.52 | 59.47 | 50.42 | 45.12 | 41.15 | 50.46 | |||||||||||||
| 1970 | 39.32 | 44.75 | 45.21 | 46.23 | 54.26 | 61.58 | 64.21 | 64.42 | 56.67 | 50.16 | 44.25 | 38.10 | 50.76 | |||||||||||||
| 1971 | 38.69 | 41.18 | 41.10 | 47.72 | 55.08 | 55.55 | 64.69 | 66.47 | 56.98 | 49.66 | 44.32 | 37.16 | 49.88 | |||||||||||||
| 1972 | 35.52 | 40.81 | 46.56 | 45.20 | 57.47 | 59.02 | 64.34 | 64.98 | 56.05 | 49.11 | 44.08 | ----- | z | 51.19 | ||||||||||||
| 1973 | 36.95 | 41.73 | 44.76 | 48.25 | 55.34 | 58.43 | 64.02 | 59.23 | 59.72 | 50.90 | 41.30 | 42.53 | 50.26 | |||||||||||||
| 1974 | 36.26 | 40.98 | 45.05 | 48.83 | 52.19 | 60.68 | 63.05 | 64.45 | 62.90 | 52.15 | 46.15 | 42.08 | 51.23 | |||||||||||||
| 1975 | 39.19 | 40.80 | 42.24 | 44.93 | 54.68 | 58.12 | 65.37 | 61.90 | 60.72 | 51.26 | 43.82 | 39.92 | 50.25 | |||||||||||||
| 1976 | 40.73 | 40.10 | 42.39 | 47.98 | 55.48 | 57.48 | 63.61 | 62.15 | 61.47 | 51.53 | 44.52 | 40.02 | 50.62 | |||||||||||||
| 1977 | 36.23 | 44.84 | 42.87 | 51.12 | 51.60 | 62.03 | 62.37 | 69.10 | 57.80 | 51.16 | 42.52 | 41.18 | 51.07 | |||||||||||||
| 1978 | 42.21 | 45.45 | 48.35 | 49.53 | 53.13 | 62.80 | 65.89 | 64.82 | 58.08 | 53.24 | 38.52 | 35.23 | 51.44 | |||||||||||||
| 1979 | 31.10 | 40.23 | 47.69 | 50.33 | 55.88 | a | 59.85 | 66.11 | 63.73 | 62.43 | 55.11 | 43.00 | 43.71 | 51.60 | ||||||||||||
| 1980 | 34.34 | 42.76 | 45.06 | 51.98 | 54.30 | a | 57.63 | 65.00 | 62.77 | 60.05 | 53.18 | 46.07 | 43.37 | 51.38 | ||||||||||||
| 1981 | 41.89 | 43.43 | 48.45 | 50.00 | 55.05 | 58.28 | 64.93 | k | 68.50 | f | 60.65 | f | 50.32 | a | 45.98 | 40.59 | b | 48.22 | ||||||||
| 1982 | 37.03 | 40.71 | 44.77 | 47.02 | 55.18 | 64.00 | 62.86 | q | 63.64 | m | 60.42 | j | 54.24 | l | 40.87 | k | 39.25 | i | 48.12 | |||||||
| 1983 | 42.94 | 45.96 | 48.84 | 50.52 | 57.18 | i | 59.53 | 63.81 | 65.45 | 58.30 | 50.05 | 46.63 | 34.71 | 51.52 | ||||||||||||
| 1984 | 40.90 | 42.90 | 47.55 | 47.47 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.78 | ||||
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.00 | 35.58 | 34.35 | 39.65 | ||||
| 1986 | 41.95 | 42.46 | 49.15 | 48.72 | 55.52 | 62.48 | 60.85 | 67.27 | 58.60 | 54.73 | 45.05 | 39.21 | 52.17 | |||||||||||||
| 1987 | 39.23 | 44.25 | 47.61 | 52.57 | 56.60 | 60.58 | 63.50 | 64.29 | 61.27 | 53.63 | 46.72 | 37.89 | 52.34 | |||||||||||||
| 1988 | 38.78 | a | 43.80 | b | 45.94 | 51.12 | 55.32 | 58.78 | 63.21 | 62.11 | 58.17 | 55.79 | 45.08 | 40.44 | 51.54 | |||||||||||
| 1989 | 40.73 | 35.35 | a | 44.42 | 52.77 | 55.52 | 61.60 | 62.21 | 63.94 | 61.85 | d | 53.32 | 46.52 | 41.26 | 51.62 | |||||||||||
| 1990 | 41.56 | 39.66 | 48.26 | 53.37 | 55.34 | 61.45 | 67.61 | h | 67.34 | 64.42 | 50.53 | 45.05 | b | 33.29 | 50.93 | |||||||||||
| 1991 | 38.48 | 47.12 | 44.61 | 49.45 | 53.11 | 57.88 | 65.76 | 66.92 | 62.15 | 52.63 | 46.22 | 41.27 | 52.13 | |||||||||||||
| 1992 | 42.87 | 47.64 | 50.77 | 53.20 | 58.15 | 63.12 | b | 66.50 | 66.55 | 59.10 | 53.84 | 43.62 | b | 37.76 | 53.59 | |||||||||||
| 1993 | 35.23 | 40.26 | e | 47.27 | a | 50.72 | 60.90 | 60.90 | 61.66 | 64.74 | 60.48 | 54.87 | d | 39.43 | a | 39.64 | c | 51.34 | ||||||||
| 1994 | 43.73 | 39.33 | a | 49.06 | ----- | z | 56.58 | e | 58.77 | 65.97 | 64.37 | d | 62.70 | c | 50.33 | b | 40.24 | a | 40.16 | 51.93 | ||||||
| 1995 | 42.55 | 44.71 | 46.83 | b | 50.43 | 58.71 | 60.53 | 66.34 | 62.90 | 65.22 | 52.19 | 48.02 | 41.30 | c | 53.31 | |||||||||||
| 1996 | 40.66 | 42.00 | 47.89 | 52.75 | 54.29 | 60.28 | a | 67.23 | 66.42 | 58.20 | 51.60 | 44.30 | 40.31 | 52.16 | ||||||||||||
| 1997 | 40.71 | 42.59 | 46.21 | 50.15 | 59.47 | 61.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.10 | |||||||
| 1998 | ----- | z | 45.73 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.37 | 39.92 | 44.34 | ||||
| 1999 | 41.73 | 42.93 | 45.37 | 49.17 | 54.03 | 60.33 | 64.19 | 66.73 | 59.69 | f | 51.81 | 47.67 | 42.12 | a | 51.46 | |||||||||||
| 2000 | 39.68 | a | 43.62 | a | 46.11 | 54.20 | b | 58.24 | 64.47 | 66.82 | 65.50 | f | 61.82 | 52.53 | b | 43.80 | j | 40.15 | 52.76 | |||||||
| 2001 | 40.82 | c | 41.93 | 48.74 | 49.93 | 58.82 | a | 61.05 | b | 65.06 | g | 67.40 | ----- | z | 51.35 | 46.46 | e | 39.48 | c | 50.60 | ||||||
| 2002 | 40.65 | 43.62 | 43.94 | 52.30 | 56.50 | 64.85 | 68.85 | 68.06 | 62.08 | l | 51.63 | 46.30 | 42.56 | 52.66 | ||||||||||||
| 2003 | 45.15 | 43.05 | 49.06 | 51.30 | 57.69 | 60.08 | 64.50 | 64.50 | 60.78 | 55.04 | g | ----- | z | 40.62 | e | 53.67 | ||||||||||
| 2004 | 37.77 | 42.22 | 47.33 | e | 51.90 | 55.02 | f | 63.60 | i | 66.13 | ----- | z | 57.96 | f | 52.90 | ----- | z | ----- | z | 49.71 | ||||||
| 2005 | 40.21 | e | 41.81 | l | 48.66 | 50.73 | 57.23 | 58.33 | j | 62.85 | 63.82 | 56.13 | ----- | z | ----- | z | 37.73 | 52.17 | ||||||||
| 2006 | 42.77 | 39.55 | 44.35 | 48.78 | 54.61 | 60.27 | 63.58 | 63.02 | 58.92 | 49.06 | ----- | z | ----- | z | 52.49 | |||||||||||
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.57 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.25 | 42.46 | 45.88 | 49.66 | 55.34 | 60.27 | 64.24 | 64.40 | 59.99 | 51.92 | 44.42 | 39.55 | 51.32 | |||||||||||||
| S.D. | 3.21 | 2.49 | 2.46 | 2.40 | 2.40 | 2.36 | 1.95 | 2.44 | 2.43 | 1.77 | 2.72 | 2.55 | 1.00 | |||||||||||||
| SKEW | -0.81 | -0.14 | -0.17 | -0.27 | -0.10 | 0.19 | 0.04 | -0.02 | 0.16 | 0.38 | -1.38 | -0.68 | 0.30 | |||||||||||||
| MAX | 45.15 | 47.64 | 50.77 | 54.20 | 60.90 | 64.85 | 68.85 | 69.10 | 65.22 | 55.79 | 48.02 | 43.71 | 53.59 | |||||||||||||
| MIN | 31.10 | 35.35 | 41.10 | 44.85 | 49.53 | 55.55 | 60.29 | 59.23 | 56.05 | 49.00 | 35.58 | 33.29 | 49.59 | |||||||||||||
| NO YRS | 43 | 43 | 43 | 41 | 40 | 39 | 35 | 37 | 35 | 39 | 37 | 39 | 25 | |||||||||||||