| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | 19.16 | 24.55 | 26.42 | 46.00 | 52.45 | 61.23 | 66.03 | 63.74 | 57.31 | a | 43.63 | a | 27.33 | 27.48 | 42.95 | |||||||||||
| 1949 | 17.42 | 27.57 | 34.00 | 42.07 | a | 51.39 | 59.13 | 65.00 | 61.97 | 56.43 | 42.90 | 35.00 | a | 24.50 | a | 43.12 | ||||||||||
| 1950 | 26.48 | 30.04 | a | 30.73 | a | 40.59 | a | 50.34 | b | 61.13 | 63.00 | a | 59.97 | b | 55.66 | a | 49.29 | 29.47 | 23.90 | 43.38 | ||||||
| 1951 | 21.19 | 26.57 | 30.68 | 38.10 | 51.03 | 58.70 | 68.10 | 65.45 | 54.57 | 44.03 | 28.47 | 25.71 | 42.72 | |||||||||||||
| 1952 | 28.68 | 28.10 | 31.65 | 41.93 | 50.87 | 65.23 | 64.39 | 65.29 | 55.50 | 41.26 | 27.73 | 23.23 | 43.65 | |||||||||||||
| 1953 | 29.06 | 24.00 | 35.84 | 38.07 | 47.84 | 65.80 | 65.97 | 63.74 | 55.07 | 46.13 | a | 33.70 | 21.94 | 43.93 | ||||||||||||
| 1954 | 25.97 | 31.96 | a | 30.94 | 45.77 | 50.77 | 62.63 | 68.03 | 65.13 | 60.90 | a | 46.58 | ----- | z | ----- | z | 48.87 | |||||||||
| 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 | 28.16 | 40.90 | 52.13 | 57.30 | 64.03 | 63.23 | 56.73 | 45.26 | 33.07 | 26.03 | 46.68 | |||||||||||
| 1963 | 11.81 | 26.00 | 32.90 | 44.00 | 52.77 | 60.37 | 66.35 | 64.13 | 58.43 | 48.97 | 33.50 | 19.03 | 43.19 | |||||||||||||
| 1964 | 21.77 | 19.28 | 28.29 | 40.50 | 52.58 | 60.70 | 66.81 | 63.87 | 57.97 | 44.94 | 32.93 | 26.06 | 42.97 | |||||||||||||
| 1965 | 26.94 | 20.82 | 25.68 | 43.20 | 50.74 | 58.77 | 66.00 | 61.81 | 54.03 | 43.00 | 37.83 | 29.10 | 43.16 | |||||||||||||
| 1966 | 16.71 | 22.50 | 34.23 | 41.33 | 50.97 | 61.17 | 69.32 | 61.32 | 55.67 | 41.77 | 35.77 | 20.94 | 42.64 | |||||||||||||
| 1967 | 24.39 | 24.64 | 37.48 | 46.97 | 49.16 | 60.20 | 65.10 | 60.71 | 55.80 | 44.45 | 32.90 | 22.77 | 43.71 | |||||||||||||
| 1968 | 26.13 | 26.48 | 33.58 | 39.77 | 49.97 | 60.73 | 64.16 | 63.45 | 54.67 | 46.94 | 33.37 | 25.03 | 43.69 | |||||||||||||
| 1969 | 29.16 | 29.46 | 27.16 | 45.87 | 52.74 | 59.23 | 68.10 | 66.81 | 58.23 | 42.94 | 31.30 | 26.52 | 44.79 | |||||||||||||
| 1970 | 21.06 | 29.82 | 29.13 | 40.13 | 52.29 | 59.67 | 66.13 | 64.68 | 54.70 | 40.10 | 33.77 | 29.10 | 43.38 | |||||||||||||
| 1971 | 24.00 | 26.00 | 31.74 | 42.13 | 49.87 | 61.27 | 64.65 | 60.90 | 55.13 | 43.87 | 34.40 | 28.26 | 43.52 | |||||||||||||
| 1972 | 21.29 | 26.14 | 36.58 | 43.17 | 51.39 | 61.53 | 63.23 | 62.13 | 55.73 | 44.87 | 27.87 | 22.61 | 43.04 | |||||||||||||
| 1973 | 21.03 | 27.29 | 34.16 | 36.17 | 48.19 | 58.67 | 63.97 | 63.68 | 53.93 | 44.52 | 34.40 | 23.90 | 42.49 | |||||||||||||
| 1974 | 23.32 | 27.25 | 37.32 | 43.13 | 55.71 | 60.87 | 65.45 | 62.32 | 52.73 | 47.74 | 34.00 | 24.16 | 44.50 | |||||||||||||
| 1975 | 24.32 | 24.82 | 32.55 | 39.70 | 48.32 | 58.97 | 63.35 | 63.90 | 53.73 | 44.94 | 30.27 | 26.45 | 42.61 | |||||||||||||
| 1976 | 22.16 | 33.10 | 33.52 | 45.20 | 49.48 | 60.47 | 63.90 | 63.71 | 56.33 | 39.03 | 26.30 | 22.23 | 42.95 | |||||||||||||
| 1977 | 17.39 | 27.54 | 31.94 | 44.97 | 54.39 | 63.77 | 66.71 | 65.90 | 58.13 | 45.52 | 32.90 | 27.19 | 44.69 | |||||||||||||
| 1978 | 20.61 | 24.29 | 34.35 | 44.37 | 51.03 | 62.23 | 67.74 | 63.71 | 57.70 | 46.00 | 37.50 | 20.26 | 44.15 | |||||||||||||
| 1979 | 16.71 | 26.32 | 35.03 | 42.63 | 51.19 | 59.77 | 65.10 | 62.16 | 56.77 | 45.39 | 28.67 | 24.77 | 42.88 | |||||||||||||
| 1980 | 24.39 | 26.79 | 31.77 | 39.43 | 51.16 | 65.77 | 70.52 | 64.29 | 57.20 | 42.68 | 32.17 | 29.45 | 44.63 | |||||||||||||
| 1981 | 26.97 | 28.32 | 36.68 | 48.30 | 51.97 | 63.97 | 68.00 | 63.68 | 57.40 | 46.68 | 38.13 | 27.71 | 46.48 | |||||||||||||
| 1982 | 24.97 | 25.93 | 35.06 | 43.03 | 51.42 | 59.30 | 65.48 | ----- | z | 58.73 | ----- | z | ----- | z | ----- | z | 45.49 | |||||||||
| 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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2011 | 18.13 | 19.31 | b | 33.65 | 40.74 | k | 48.00 | 64.34 | a | 69.00 | d | 69.07 | a | 56.24 | a | 44.29 | 33.50 | 22.52 | 43.46 | |||||||
| 2012 | 27.00 | a | 26.37 | b | 36.81 | d | 46.69 | a | 54.77 | 66.27 | 69.74 | 66.87 | 57.87 | 45.55 | 37.10 | 28.77 | 46.98 | |||||||||
| 2013 | 25.13 | 29.18 | 35.84 | 44.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.00 | z | 30.05 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 22.78 | 26.35 | 32.71 | 42.56 | 51.17 | 61.31 | 66.11 | 63.71 | 56.31 | 44.59 | 32.62 | 24.99 | 43.70 | |||||||||||||
| S.D. | 4.26 | 3.20 | 3.27 | 2.97 | 1.90 | 2.41 | 2.05 | 2.00 | 1.79 | 2.36 | 3.31 | 2.85 | 1.12 | |||||||||||||
| SKEW | -0.53 | -0.34 | -0.50 | -0.07 | 0.28 | 0.66 | 0.41 | 0.45 | 0.24 | -0.24 | -0.23 | -0.18 | 1.54 | |||||||||||||
| MAX | 29.16 | 33.10 | 37.48 | 48.30 | 55.71 | 66.27 | 70.52 | 69.07 | 60.90 | 49.29 | 38.13 | 29.45 | 46.98 | |||||||||||||
| MIN | 11.81 | 19.28 | 25.68 | 36.17 | 47.84 | 57.30 | 63.00 | 59.97 | 52.73 | 39.03 | 26.30 | 19.03 | 42.49 | |||||||||||||
| NO YRS | 30 | 30 | 31 | 29 | 30 | 30 | 30 | 29 | 30 | 29 | 28 | 28 | 26 | |||||||||||||