YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.16 | 50.84 | 39.73 | 30.58 | 23.87 | 11.87 | 35.01 | f | ||||||
1971 | 14.29 | 19.44 | a | 23.10 | 34.70 | 45.29 | 45.83 | a | 53.06 | 52.55 | 40.96 | d | 32.03 | b | 28.23 | 8.08 | e | 33.13 | ||||||||
1972 | 7.26 | 18.86 | 29.23 | 29.23 | 43.73 | a | 48.59 | a | 51.71 | 53.77 | 38.33 | 29.45 | 31.60 | 14.00 | 32.98 | |||||||||||
1973 | 12.58 | 19.93 | 28.48 | 34.67 | 41.94 | 47.87 | 55.03 | 53.00 | 46.60 | 35.84 | 25.03 | 23.68 | 35.39 | |||||||||||||
1974 | 10.76 | b | 24.04 | 26.26 | 37.13 | 39.29 | 49.77 | 53.55 | 54.94 | 45.70 | 33.68 | 29.47 | 22.60 | a | 35.60 | |||||||||||
1975 | 11.03 | 14.59 | a | 24.97 | a | 33.00 | a | 41.17 | a | 47.30 | 57.45 | 51.81 | 45.44 | c | 36.03 | a | 23.52 | a | 20.93 | a | 33.94 | |||||
1976 | 18.14 | b | 21.52 | 25.03 | 34.90 | 41.06 | 45.33 | 53.45 | 53.03 | 46.83 | 32.77 | 23.83 | 18.48 | 34.53 | ||||||||||||
1977 | 12.16 | 24.86 | 29.03 | 37.28 | a | 40.68 | 52.17 | 53.39 | 57.65 | 42.40 | 32.32 | 24.23 | 16.23 | 35.20 | ||||||||||||
1978 | 19.06 | 24.85 | a | 30.26 | 36.63 | 40.57 | a | 49.57 | 55.35 | 52.39 | 43.88 | d | 31.48 | 19.67 | 8.48 | 34.35 | ||||||||||
1979 | 2.16 | 15.79 | 28.71 | 33.03 | 42.23 | 49.70 | 55.97 | 54.58 | 45.97 | 37.03 | 23.93 | 23.54 | g | 35.37 | a | |||||||||||
1980 | 6.10 | 24.03 | 26.48 | 37.60 | 45.00 | 45.93 | 51.68 | 47.77 | 43.53 | 33.68 | 27.81 | c | 20.20 | a | 34.15 | |||||||||||
1981 | 27.84 | 25.61 | 30.58 | 32.83 | 42.94 | 44.43 | 52.10 | 54.48 | 44.00 | 32.00 | a | 28.97 | 14.29 | 35.84 | ||||||||||||
1982 | 12.32 | 17.70 | a | 27.29 | 29.90 | 39.77 | a | 51.97 | 52.10 | 51.84 | 43.77 | 31.71 | 21.46 | b | 16.07 | b | 32.99 | |||||||||
1983 | 23.68 | c | 27.00 | b | 32.97 | b | 34.93 | 42.10 | 47.20 | 49.47 | a | 52.33 | a | 39.37 | 31.97 | a | 30.20 | 6.17 | b | 34.78 | ||||||
1984 | 16.42 | e | 24.88 | d | 31.28 | b | 33.18 | b | 36.50 | c | 47.69 | a | 51.55 | 50.83 | b | 39.37 | 30.33 | a | 25.07 | c | 3.74 | 32.57 | ||||
1985 | 13.52 | 9.07 | a | 23.34 | b | 33.67 | 41.90 | a | 48.13 | 56.10 | a | 50.74 | 41.60 | 33.07 | c | 10.96 | d | 9.19 | e | 30.94 | ||||||
1986 | 19.29 | c | 18.69 | b | 31.43 | a | 34.30 | 40.30 | a | 51.03 | 52.32 | 55.87 | 42.34 | a | 34.89 | c | 26.96 | b | 22.00 | b | 35.79 | |||||
1987 | 17.41 | b | 26.04 | b | 31.10 | a | 37.48 | a | 43.53 | a | 50.93 | a | 54.32 | 52.67 | d | 46.34 | a | 34.70 | a | 29.54 | b | 18.63 | d | 36.89 | ||
1988 | 13.82 | c | 19.70 | b | 27.60 | a | 36.34 | a | 41.32 | 49.30 | 53.13 | 51.23 | a | 43.45 | a | 36.18 | c | 26.57 | 18.23 | a | 34.74 | |||||
1989 | 15.65 | 14.11 | 25.79 | b | 36.69 | a | 41.69 | b | 50.67 | 52.52 | 51.70 | a | 44.59 | a | 33.27 | a | 29.40 | 25.87 | a | 35.16 | ||||||
1990 | 21.55 | b | 16.20 | c | 29.52 | b | 38.46 | b | 42.77 | 48.87 | 56.77 | 55.03 | a | 47.87 | 30.52 | 26.10 | 10.97 | b | 35.39 | |||||||
1991 | 12.97 | 29.33 | a | 27.43 | a | 33.73 | 41.97 | 44.64 | b | 53.48 | b | 54.63 | a | 45.00 | 29.97 | 26.21 | b | 23.70 | a | 35.26 | ||||||
1992 | 22.83 | a | 30.46 | c | 33.79 | b | 34.86 | a | 43.57 | a | 54.60 | 55.17 | a | 51.52 | 41.21 | b | 34.55 | b | 27.04 | c | 14.11 | c | 36.98 | |||
1993 | 12.38 | b | 16.26 | a | 27.79 | b | 33.48 | a | 46.13 | a | 46.83 | a | 49.31 | b | 50.00 | 42.47 | 33.84 | 16.04 | d | 17.93 | b | 32.71 | ||||
1994 | 20.71 | c | 19.33 | d | 28.77 | a | 37.43 | 43.45 | 46.00 | 54.52 | 52.37 | a | 45.97 | 32.45 | 20.07 | 16.13 | a | 34.77 | ||||||||
1995 | 17.82 | c | 21.64 | 25.97 | b | 33.62 | a | 42.55 | 46.93 | a | 52.13 | a | 45.40 | a | 44.61 | b | 31.13 | 25.43 | 19.81 | d | 33.92 | |||||
1996 | 13.23 | a | 18.23 | c | 25.57 | a | 33.50 | 37.00 | a | 44.45 | a | 52.16 | 50.55 | 40.87 | 32.43 | c | 21.58 | d | 10.28 | b | 31.65 | |||||
1997 | 11.78 | d | 17.37 | a | 25.68 | 32.67 | c | 41.42 | 47.21 | a | 51.26 | 53.41 | b | 46.14 | a | 34.45 | b | 29.53 | 21.41 | d | 34.36 | |||||
1998 | 16.90 | b | 28.96 | b | 30.56 | d | 34.45 | a | 45.48 | 49.03 | a | 58.29 | 53.57 | a | 47.80 | 33.10 | 31.00 | a | 19.71 | c | 37.40 | |||||
1999 | 22.93 | a | 23.54 | 27.50 | a | 31.83 | a | 39.23 | 45.04 | b | 50.97 | 54.90 | b | 42.62 | a | 33.00 | a | 33.69 | a | ----- | z | 36.84 | a | |||
2000 | ----- | z | 22.92 | p | 31.62 | g | 34.10 | t | 43.57 | a | 50.23 | h | 53.67 | d | 59.15 | r | ----- | z | ----- | z | ----- | z | ----- | z | 48.62 | j |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | 42.57 | a | 47.87 | 54.87 | 54.42 | 46.56 | c | 33.86 | q | 30.83 | r | 22.23 | a | 44.75 | f | |||
2002 | 22.55 | 22.61 | 25.62 | j | 36.77 | 41.52 | 50.59 | c | 54.87 | 51.42 | 44.60 | 30.90 | 28.22 | c | 29.55 | 37.60 | a | |||||||||
2003 | 25.84 | 22.89 | 30.10 | b | 37.03 | 42.20 | a | 49.30 | c | 54.45 | 55.03 | a | 45.37 | 39.50 | c | 22.41 | c | 19.84 | 37.00 | |||||||
2004 | 18.33 | a | 23.07 | b | 31.94 | 37.07 | 42.71 | c | 50.70 | 52.87 | a | 56.94 | 44.11 | b | 35.19 | j | 27.31 | d | 25.45 | 37.32 | a | |||||
2005 | 18.97 | a | 22.11 | 32.07 | b | 36.74 | c | 46.81 | 48.70 | 54.10 | b | 53.26 | 44.03 | 39.47 | a | 26.63 | c | 17.71 | 36.72 | |||||||
2006 | 25.39 | 19.78 | a | 30.90 | 38.07 | 43.52 | 48.60 | 57.16 | 51.29 | 46.30 | 35.86 | i | 26.30 | c | 18.81 | 36.92 | a | |||||||||
2007 | 12.77 | a | 26.58 | b | 31.87 | 35.33 | 42.58 | 48.68 | b | 57.84 | 52.87 | 45.60 | 35.38 | j | 26.77 | d | 16.87 | 36.16 | a | |||||||
2008 | 10.33 | a | 19.76 | 27.84 | 32.60 | 45.90 | a | 47.22 | c | 54.19 | 54.61 | 45.07 | 35.35 | 31.73 | ----- | z | 36.78 | a | ||||||||
2009 | 14.74 | 20.68 | 25.93 | a | 36.30 | 42.42 | 50.41 | a | 55.23 | 52.23 | 46.47 | 33.26 | 29.60 | 15.58 | 35.24 | |||||||||||
2010 | 28.39 | 30.75 | 32.16 | 36.40 | 41.10 | a | 46.00 | 51.74 | 51.97 | 47.37 | 38.35 | e | 24.57 | 22.97 | 37.65 | |||||||||||
2011 | 20.23 | 18.75 | 30.19 | 31.77 | 41.55 | 46.67 | 51.00 | 53.03 | 47.67 | 36.52 | 23.77 | 19.29 | 35.04 | |||||||||||||
2012 | 17.97 | 23.86 | 28.77 | 37.60 | 41.61 | 49.63 | 56.55 | 53.48 | 43.72 | a | 34.00 | 31.00 | 23.45 | 36.80 | ||||||||||||
2013 | 14.71 | 23.46 | 27.29 | 34.70 | 44.03 | a | 50.13 | 55.71 | 57.03 | a | 51.43 | b | 32.47 | a | 26.50 | 16.58 | 36.17 | |||||||||
2014 | 24.71 | 20.00 | 28.42 | 35.00 | a | 39.61 | 48.87 | 58.50 | a | 61.65 | 50.93 | 43.55 | 26.69 | d | 25.37 | a | 38.61 | |||||||||
2015 | 25.13 | 32.21 | 35.06 | 37.57 | 48.87 | 59.11 | b | 58.77 | 58.89 | c | 46.41 | c | 42.06 | 28.50 | 21.59 | b | 41.18 | |||||||||
2016 | 24.19 | 26.55 | 34.53 | a | 43.68 | b | 49.33 | a | 53.37 | ----- | z | 56.10 | a | 46.57 | 40.84 | 38.43 | 12.87 | 38.77 | a | |||||||
2017 | 15.84 | 19.46 | 30.77 | 37.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.98 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.04 | 21.88 | 28.94 | 35.24 | 42.49 | 48.73 | 53.98 | 53.25 | 44.59 | 34.16 | 26.34 | 17.70 | 35.16 | |||||||||||||
S.D. | 5.91 | 4.80 | 2.87 | 2.56 | 2.54 | 2.82 | 2.34 | 2.75 | 2.80 | 3.29 | 4.58 | 5.72 | 1.99 | |||||||||||||
SKEW | -0.09 | -0.03 | 0.06 | 0.30 | 0.40 | 1.14 | 0.23 | 0.26 | -0.09 | 1.09 | -0.66 | -0.43 | 0.47 | |||||||||||||
MAX | 28.39 | 32.21 | 35.06 | 43.68 | 49.33 | 59.11 | 58.77 | 61.65 | 51.43 | 43.55 | 38.43 | 29.55 | 41.18 | |||||||||||||
MIN | 2.16 | 9.07 | 23.10 | 29.23 | 36.50 | 44.43 | 49.31 | 45.40 | 38.33 | 29.45 | 10.96 | 3.74 | 30.94 | |||||||||||||
YRS | 45 | 45 | 44 | 45 | 46 | 45 | 46 | 46 | 46 | 42 | 45 | 43 | 36 |