| 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.13 | 37.97 | 33.65 | 37.91 | ||||
| 1990 | 36.16 | 32.64 | 38.10 | 43.30 | 44.71 | 50.37 | 55.16 | 56.48 | 50.90 | 40.13 | 36.77 | 25.61 | 42.53 | |||||||||||||
| 1991 | 29.13 | 39.00 | 34.97 | 39.13 | 42.45 | 47.67 | 54.87 | 53.65 | 47.90 | 40.06 | 40.07 | 34.48 | 41.95 | |||||||||||||
| 1992 | 34.87 | 36.76 | 38.16 | 42.57 | ----- | z | 52.27 | 53.94 | 50.81 | 45.53 | 42.39 | 38.13 | 33.26 | 42.61 | ||||||||||||
| 1993 | 29.06 | 27.57 | 41.81 | 43.07 | 47.74 | 50.50 | 53.23 | 54.29 | 49.07 | 45.71 | 33.00 | 35.45 | 42.54 | |||||||||||||
| 1994 | 36.94 | 34.50 | 37.52 | 43.10 | 47.74 | 49.50 | 56.19 | 53.00 | 51.27 | 42.35 | 36.37 | 37.61 | 43.84 | |||||||||||||
| 1995 | 38.81 | 41.18 | 38.45 | 40.17 | 45.74 | 50.37 | 56.77 | 51.23 | 53.90 | 44.45 | 45.10 | 40.26 | 45.54 | |||||||||||||
| 1996 | 38.19 | 37.55 | 37.68 | 41.00 | 43.87 | 49.43 | 56.97 | 53.55 | 47.67 | 44.97 | 41.50 | 37.90 | 44.19 | |||||||||||||
| 1997 | 34.81 | 36.14 | 37.77 | 41.03 | 48.26 | 51.43 | 55.13 | 55.16 | 50.33 | 44.06 | 41.33 | 33.65 | 44.09 | |||||||||||||
| 1998 | 38.74 | 36.96 | 37.84 | 39.67 | 46.13 | 50.53 | 56.87 | 54.16 | 49.63 | 42.35 | 40.69 | a | 31.97 | 43.80 | ||||||||||||
| 1999 | 35.90 | 35.18 | 36.35 | 37.97 | 41.06 | 47.20 | 51.65 | 54.68 | 45.27 | 39.68 | 42.93 | 36.74 | 42.05 | |||||||||||||
| 2000 | 35.87 | 40.17 | 35.61 | 41.13 | 46.68 | 52.63 | 54.42 | 53.26 | 49.63 | 43.10 | a | 35.14 | a | 35.74 | 43.62 | |||||||||||
| 2001 | 33.29 | 32.79 | 37.16 | 38.50 | 44.32 | 48.93 | 53.65 | 53.84 | 49.33 | 42.65 | 41.20 | 36.52 | 42.68 | |||||||||||||
| 2002 | 37.23 | 35.07 | 33.58 | 40.20 | 43.52 | 50.87 | 56.26 | 53.10 | 48.50 | 38.26 | 35.73 | 38.55 | 42.57 | |||||||||||||
| 2003 | 40.45 | 34.36 | 40.29 | 40.17 | 44.23 | 51.37 | 55.13 | 55.58 | 50.30 | 46.16 | 39.13 | ----- | z | 45.20 | ||||||||||||
| 2004 | 38.13 | 37.34 | 39.13 | 40.53 | 48.06 | 52.20 | 55.77 | 57.26 | 51.03 | 45.74 | 39.20 | 38.58 | 45.25 | |||||||||||||
| 2005 | 35.03 | 34.82 | 39.81 | 40.73 | 49.00 | 51.30 | 56.06 | 55.77 | 47.17 | 45.97 | 39.77 | 36.81 | 44.35 | |||||||||||||
| 2006 | 37.81 | 32.39 | 36.77 | 41.13 | 46.90 | 54.80 | 57.26 | 53.23 | 48.83 | 40.87 | 40.17 | 35.81 | 43.83 | |||||||||||||
| 2007 | 30.77 | 36.79 | 38.84 | 40.30 | 44.94 | 49.97 | 58.52 | 54.58 | 48.20 | 43.19 | 38.17 | 36.29 | 43.38 | |||||||||||||
| 2008 | 32.03 | 34.90 | 35.71 | 36.43 | 46.29 | 47.30 | 55.61 | 54.61 | 47.30 | 42.68 | 43.03 | 33.45 | 42.45 | |||||||||||||
| 2009 | 34.00 | 34.64 | 35.71 | 37.97 | 45.29 | 54.03 | 57.39 | 54.71 | 49.73 | 43.06 | 37.60 | 31.03 | 42.93 | |||||||||||||
| 2010 | 40.77 | 38.64 | 36.39 | 38.90 | 43.23 | 50.13 | 54.32 | 54.06 | 51.87 | 44.84 | 39.70 | 37.29 | 44.18 | |||||||||||||
| 2011 | 36.10 | 32.25 | 38.97 | 37.97 | 43.16 | 49.77 | 53.45 | 54.84 | 50.87 | 45.13 | 38.40 | 31.84 | 42.73 | |||||||||||||
| 2012 | 34.58 | 34.72 | 36.03 | 42.97 | 44.00 | 48.83 | 54.45 | 55.39 | 48.80 | 43.13 | 42.00 | 36.87 | 43.48 | |||||||||||||
| 2013 | 32.23 | 36.11 | 38.39 | 49.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.00 | z | 35.57 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.45 | 35.52 | 37.54 | 40.34 | 45.33 | 50.50 | 55.35 | 54.23 | 49.26 | 43.04 | 39.30 | 35.19 | 43.43 | |||||||||||||
| S.D. | 3.20 | 2.90 | 1.84 | 1.88 | 2.10 | 1.92 | 1.61 | 1.48 | 2.00 | 2.15 | 2.78 | 3.16 | 0.98 | |||||||||||||
| SKEW | -0.40 | -0.44 | 0.09 | -0.09 | -0.03 | 0.30 | -0.20 | -0.36 | 0.01 | -0.41 | -0.15 | -1.13 | 0.46 | |||||||||||||
| MAX | 40.77 | 41.18 | 41.81 | 43.30 | 49.00 | 54.80 | 58.52 | 57.26 | 53.90 | 46.16 | 45.10 | 40.26 | 45.54 | |||||||||||||
| MIN | 29.06 | 27.57 | 33.58 | 36.43 | 41.06 | 47.20 | 51.65 | 50.81 | 45.27 | 38.26 | 33.00 | 25.61 | 41.95 | |||||||||||||
| NO YRS | 24 | 24 | 24 | 23 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 21 | |||||||||||||