YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.55 | 53.08 | 39.28 | 24.10 | a | 44.75 | h | |||
1969 | 26.93 | b | 25.75 | 33.00 | 50.38 | 61.53 | 64.10 | 75.47 | 75.32 | 65.55 | 45.16 | 39.00 | 33.26 | 49.62 | ||||||||||||
1970 | 28.52 | 37.70 | 38.24 | 43.03 | 59.11 | 67.47 | 75.35 | 75.40 | 60.57 | 48.11 | 39.70 | 28.26 | 50.12 | |||||||||||||
1971 | 27.77 | 33.39 | 37.61 | 47.97 | a | 55.26 | 67.57 | 74.24 | 75.35 | 59.70 | 49.56 | 35.80 | 24.65 | 49.07 | ||||||||||||
1972 | 27.81 | 35.60 | 47.39 | 48.27 | 59.65 | 68.38 | 76.63 | 73.89 | 63.85 | 52.30 | a | 34.73 | b | 21.98 | 50.87 | |||||||||||
1973 | 16.87 | 26.71 | 37.05 | 45.10 | 57.92 | 65.10 | 71.90 | 72.27 | 63.90 | 55.65 | a | 37.91 | b | 29.19 | 48.30 | |||||||||||
1974 | 18.53 | 23.21 | 42.11 | 45.03 | 61.55 | 74.22 | 77.98 | 73.53 | 68.85 | d | 60.73 | p | 40.07 | o | 31.31 | 51.63 | b | |||||||||
1975 | 24.92 | 31.57 | 41.79 | c | 43.36 | a | 53.53 | 60.35 | f | 72.29 | 70.97 | 63.83 | a | 52.13 | h | 28.04 | r | 28.70 | d | 47.88 | c | |||||
1976 | 25.45 | 36.17 | 36.86 | i | 46.73 | 58.05 | a | 65.57 | c | 75.97 | b | 70.34 | 64.00 | 50.44 | 44.54 | f | 27.95 | 52.07 | b | |||||||
1977 | 22.52 | a | 35.87 | a | 37.16 | 52.33 | 54.02 | a | 71.27 | 73.27 | 73.00 | a | 63.27 | ----- | z | ----- | z | 34.16 | 51.69 | b | ||||||
1978 | 25.20 | a | 27.34 | ----- | z | ----- | z | 59.00 | l | 69.02 | 76.05 | a | 72.74 | 62.93 | a | 54.74 | l | 39.38 | b | 19.85 | a | 49.06 | d | |||
1979 | 16.65 | 22.32 | c | 36.03 | 47.70 | 56.95 | 68.00 | 74.69 | 70.00 | e | 69.38 | 55.85 | a | 33.23 | 29.40 | a | 48.35 | |||||||||
1980 | 27.73 | a | 32.43 | 36.34 | 48.34 | b | 54.26 | 68.02 | 75.39 | 70.56 | 63.00 | 52.15 | 38.82 | 37.16 | 50.35 | |||||||||||
1981 | 35.17 | a | 35.29 | 39.52 | 54.25 | 56.19 | 71.73 | 75.50 | 73.35 | 66.57 | 48.50 | 40.52 | 30.92 | 52.29 | ||||||||||||
1982 | 21.32 | 27.96 | 39.50 | a | 46.47 | 56.71 | b | 65.72 | c | 72.83 | a | 73.50 | a | 61.57 | b | 47.66 | 34.88 | b | 28.72 | a | 48.07 | |||||
1983 | 29.21 | b | 32.48 | b | 40.66 | 43.16 | b | 54.63 | e | 65.37 | c | 71.69 | b | 73.55 | 64.97 | a | 51.98 | c | 36.60 | d | 24.30 | a | 49.05 | |||
1984 | 19.60 | b | 26.96 | a | 39.52 | f | 45.60 | d | 61.82 | a | 65.14 | b | 73.83 | a | 72.55 | b | 63.77 | b | 45.68 | a | 37.02 | b | 24.80 | d | 48.80 | a |
1985 | 23.05 | b | 25.67 | a | 38.98 | b | 51.72 | c | 59.13 | a | 71.43 | b | 75.23 | a | 73.05 | a | 58.66 | a | 50.22 | d | 33.64 | e | 29.40 | b | 49.18 | |
1986 | 34.75 | c | 39.83 | b | 47.93 | c | 48.88 | a | 57.09 | d | 72.04 | g | 71.84 | c | 73.11 | d | 59.95 | b | 49.54 | d | 40.59 | c | 32.34 | 50.53 | a | |
1987 | 26.62 | b | 34.46 | d | 38.92 | e | 53.41 | c | 58.17 | d | 70.44 | c | 71.06 | d | 70.34 | b | 65.25 | b | 56.19 | e | 38.50 | d | 28.06 | e | 50.95 | |
1988 | 22.52 | h | 31.38 | d | 38.07 | d | 50.94 | f | 56.96 | h | 70.28 | 76.18 | 71.27 | r | 55.86 | p | 57.19 | d | 36.05 | a | 26.48 | e | 47.95 | e | ||
1989 | 17.76 | n | 27.16 | f | 45.20 | d | 53.70 | e | 58.23 | c | 64.16 | h | 75.62 | s | 67.68 | q | 65.11 | c | 55.81 | o | 40.07 | i | 31.90 | 50.83 | g | |
1990 | 27.80 | a | 32.46 | e | 44.30 | i | 52.52 | 56.41 | h | 66.78 | g | 74.26 | h | 71.15 | h | 65.56 | e | 49.71 | l | 37.00 | l | 22.62 | j | 44.58 | h | |
1991 | 21.04 | g | 36.00 | h | 37.19 | g | 44.75 | j | 57.61 | i | 66.89 | k | 70.26 | n | 73.12 | j | 64.74 | i | 53.95 | i | 36.41 | m | ----- | z | ----- | z |
1992 | 21.69 | 35.57 | a | 45.13 | 56.62 | e | 62.15 | 67.67 | 71.57 | b | 72.48 | h | 65.59 | g | 55.33 | k | 36.47 | 23.33 | m | 49.61 | d | |||||
1993 | 24.46 | h | 30.37 | i | 43.14 | j | 48.79 | k | 60.33 | k | 66.08 | 70.84 | 70.22 | f | 63.05 | 51.93 | j | 32.18 | b | 28.21 | b | 52.07 | g | |||
1994 | 32.24 | 29.39 | 46.05 | a | 46.53 | m | 61.24 | l | 71.19 | l | 76.34 | o | 75.08 | g | 66.29 | m | 47.69 | o | 33.00 | j | 28.00 | t | 35.89 | i | ||
1995 | 29.39 | m | 39.40 | m | 43.67 | k | 46.96 | p | 53.89 | m | 67.00 | r | 72.53 | o | 74.15 | n | 66.36 | s | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.47 | 31.28 | 40.33 | 48.79 | 57.80 | 68.13 | 74.08 | 72.78 | 63.73 | 51.13 | 37.07 | 28.48 | 49.69 | |||||||||||||
S.D. | 5.14 | 4.81 | 4.13 | 3.99 | 2.68 | 2.72 | 2.06 | 1.69 | 2.64 | 3.64 | 2.53 | 4.04 | 1.27 | |||||||||||||
SKEW | 0.05 | -0.21 | 0.43 | 0.24 | 0.09 | 0.49 | -0.06 | -0.16 | 0.16 | 0.12 | -0.35 | -0.08 | 0.55 | |||||||||||||
MAX | 35.17 | 39.83 | 47.93 | 56.62 | 62.15 | 74.22 | 77.98 | 75.40 | 69.38 | 57.19 | 40.59 | 37.16 | 52.29 | |||||||||||||
MIN | 16.65 | 22.32 | 33.00 | 43.03 | 53.53 | 64.10 | 70.84 | 70.00 | 58.66 | 45.16 | 32.18 | 19.85 | 48.07 | |||||||||||||
YRS | 22 | 23 | 20 | 21 | 20 | 20 | 22 | 19 | 23 | 17 | 19 | 23 | 12 |