| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.00 | e | ----- | z | 30.00 | ----- | z | |
| 1971 | 28.00 | d | 29.00 | a | 28.00 | w | 50.00 | b | 61.00 | a | 87.00 | j | 72.00 | x | 73.00 | a | 58.00 | b | 40.00 | a | 26.00 | b | ----- | z | ----- | z |
| 1972 | 30.00 | a | 16.00 | 22.00 | 39.00 | a | ----- | z | 82.00 | 87.00 | 77.00 | w | 65.00 | b | 44.00 | b | ----- | z | 25.00 | ----- | z | |||||
| 1973 | ----- | z | 24.00 | ----- | z | 47.00 | 68.00 | 80.00 | ----- | z | 72.00 | 68.00 | 40.00 | a | 20.00 | 32.00 | ----- | z | ||||||||
| 1974 | 33.00 | 4.00 | 37.00 | m | 49.00 | 76.00 | b | 79.00 | b | 84.00 | 79.00 | ----- | z | 31.00 | b | 30.00 | 5.00 | ----- | z | |||||||
| 1975 | 26.00 | 32.00 | 35.00 | 47.00 | ----- | z | 73.00 | 82.00 | a | 79.00 | 57.00 | 44.00 | 26.00 | b | 27.00 | ----- | z | |||||||||
| 1976 | 28.00 | 30.00 | 27.00 | 54.00 | 65.00 | 77.00 | 83.00 | 83.00 | 61.00 | 42.00 | 46.00 | 26.00 | a | 83.00 | a | |||||||||||
| 1977 | 31.00 | 39.00 | 27.00 | a | ----- | z | 67.00 | 71.00 | 86.00 | a | 87.00 | 65.00 | 44.00 | 20.00 | 32.00 | ----- | z | |||||||||
| 1978 | 28.00 | 33.00 | a | 32.00 | 50.00 | a | 68.00 | b | 71.00 | b | 79.00 | 78.00 | 73.00 | 33.00 | a | 32.00 | 29.00 | 79.00 | g | |||||||
| 1979 | 29.00 | 16.00 | 32.00 | c | 56.00 | 64.00 | 73.00 | a | 77.00 | 76.00 | a | 65.00 | 50.00 | 40.00 | 27.00 | a | 77.00 | f | ||||||||
| 1980 | 33.00 | 37.00 | a | 32.00 | a | 50.00 | a | 72.00 | 77.00 | 78.00 | 84.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||||
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.00 | x | 41.00 | h | 32.00 | 35.00 | b | ----- | z | |
| 2016 | 35.00 | 25.00 | v | ----- | z | ----- | z | 72.00 | r | ----- | z | ----- | z | ----- | z | 43.00 | v | 51.00 | 36.00 | b | 30.00 | a | ----- | z | ||
| 2017 | 32.00 | n | 26.00 | x | 26.00 | f | 48.00 | a | 70.00 | a | 79.00 | a | 85.00 | d | 77.00 | 64.00 | 45.00 | a | 27.00 | a | 35.00 | k | ----- | z | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.10 | 26.00 | 29.57 | 49.00 | 67.89 | 76.20 | 82.33 | 78.80 | 64.00 | 41.83 | 30.45 | 27.09 | 83.00 | |||||||||||||
| S.D. | 2.85 | 10.99 | 4.43 | 4.55 | 4.46 | 3.94 | 3.61 | 4.76 | 4.92 | 5.97 | 7.99 | 7.91 | 0.0 | |||||||||||||
| SKEW | 0.35 | -0.75 | -0.55 | -0.68 | 0.30 | -0.10 | -0.27 | 0.25 | 0.23 | -0.29 | 0.47 | -2.12 | 0.00 | |||||||||||||
| MAX | 35.00 | 39.00 | 35.00 | 56.00 | 76.00 | 82.00 | 87.00 | 87.00 | 73.00 | 51.00 | 46.00 | 35.00 | 83.00 | |||||||||||||
| MIN | 26.00 | 4.00 | 22.00 | 39.00 | 61.00 | 71.00 | 77.00 | 72.00 | 57.00 | 31.00 | 20.00 | 5.00 | 83.00 | |||||||||||||
| YRS | 10 | 10 | 7 | 10 | 9 | 10 | 9 | 10 | 9 | 12 | 11 | 11 | 1 | |||||||||||||