YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 11.97 | k | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | 39.87 | 55.61 | 59.32 | 68.33 | a | 63.37 | 55.25 | 46.87 | a | 32.38 | 10.00 | 47.89 | c | |||||||
1965 | 5.47 | 7.68 | 16.77 | a | 38.30 | 52.37 | a | 56.84 | a | 62.05 | 63.42 | 49.52 | 46.21 | 29.27 | 22.85 | 37.56 | ||||||||||
1966 | -0.40 | 12.96 | 28.60 | 36.35 | 48.42 | 61.62 | 69.53 | 63.62 | c | 56.00 | 44.80 | c | 27.62 | 14.71 | 38.65 | |||||||||||
1967 | 12.00 | 6.04 | 27.02 | 38.85 | 46.03 | 58.97 | 66.29 | 63.47 | 57.68 | 45.06 | 28.13 | 18.60 | 39.01 | |||||||||||||
1968 | 11.13 | 11.48 | 33.97 | 42.63 | 48.45 | 59.14 | a | 66.48 | 63.83 | a | 58.97 | 49.47 | 31.19 | a | 13.61 | 40.86 | ||||||||||
1969 | 7.66 | 15.04 | 22.73 | 41.02 | 52.29 | 54.93 | 64.77 | 69.35 | 58.00 | 43.02 | 30.18 | 20.21 | 39.93 | |||||||||||||
1970 | 4.68 | 12.44 | a | 21.02 | 38.66 | a | 48.24 | 62.43 | 70.30 | a | 67.31 | 58.23 | 46.69 | 29.40 | 14.34 | 39.48 | ||||||||||
1971 | 2.39 | 13.71 | 23.74 | 39.87 | 49.81 | 62.85 | 63.94 | 62.97 | a | 58.68 | 50.11 | 30.84 | a | 15.44 | 39.53 | |||||||||||
1972 | 2.39 | 8.03 | 19.58 | 35.40 | 52.84 | 59.97 | 63.94 | 64.85 | 54.79 | a | 42.73 | 30.28 | 10.21 | 37.08 | ||||||||||||
1973 | 14.97 | 17.05 | 34.05 | 40.07 | 48.47 | 61.09 | a | 67.23 | 68.40 | a | 55.72 | 51.34 | 30.97 | 14.48 | 41.99 | |||||||||||
1974 | 10.00 | a | 12.13 | a | 24.85 | 41.07 | 48.34 | 61.80 | 70.77 | a | 63.21 | 52.48 | 45.77 | 33.45 | 23.12 | a | 40.58 | |||||||||
1975 | 12.37 | 16.21 | 21.65 | 33.53 | 54.66 | 60.07 | 71.26 | 65.19 | 53.92 | 48.05 | 32.57 | a | 13.31 | 40.23 | ||||||||||||
1976 | 7.26 | 24.16 | a | 25.34 | 44.16 | a | 50.43 | a | 63.75 | 68.45 | 66.85 | 57.25 | 39.02 | 24.12 | 6.48 | 39.77 | ||||||||||
1977 | 0.40 | 19.09 | 33.33 | a | 44.74 | a | 57.19 | 61.97 | 69.11 | 61.35 | 56.32 | 46.40 | 30.13 | 14.06 | 41.18 | |||||||||||
1978 | 6.21 | 9.62 | b | 27.63 | 39.42 | 54.65 | 61.48 | 65.35 | 65.35 | 59.75 | 47.61 | 29.05 | 11.13 | 39.77 | ||||||||||||
1979 | -0.13 | 4.71 | 24.47 | b | 35.83 | 48.00 | 60.28 | 66.55 | 62.32 | 58.08 | 42.85 | 29.92 | 23.52 | 38.03 | ||||||||||||
1980 | 11.21 | 13.84 | 21.92 | a | 43.12 | 55.11 | 60.90 | 68.94 | 65.86 | c | 55.48 | 41.48 | a | 32.58 | 14.79 | 40.44 | ||||||||||
1981 | 14.60 | 18.48 | 30.95 | c | 42.25 | 51.53 | 60.05 | 67.34 | 65.92 | 52.79 | a | 38.90 | a | 32.30 | ----- | z | 43.19 | a | ||||||||
1982 | -5.57 | i | 6.44 | c | 14.16 | i | 32.72 | g | 48.00 | f | 51.05 | b | 61.15 | g | 57.66 | b | 56.72 | a | 47.90 | a | 27.17 | a | 20.93 | a | 38.27 | e |
1983 | 15.13 | a | 23.00 | 28.28 | a | 36.70 | 46.18 | a | 57.84 | a | 68.47 | a | 69.48 | 58.40 | 44.69 | 31.38 | b | 3.67 | d | 40.27 | ||||||
1984 | 11.34 | b | 25.71 | 20.72 | a | 40.67 | 50.35 | a | 59.41 | a | 65.98 | 67.10 | 52.07 | a | 46.29 | 29.17 | 15.72 | b | 40.38 | |||||||
1985 | 9.28 | b | 10.98 | a | 29.55 | 43.28 | a | 52.97 | 55.48 | 63.81 | 59.89 | 53.57 | 43.61 | 20.94 | c | 3.33 | a | 37.22 | ||||||||
1986 | 11.13 | 12.39 | 28.94 | 41.45 | 50.57 | a | 59.43 | 64.87 | 61.63 | 53.80 | 44.57 | a | 26.22 | a | 19.67 | b | 39.56 | |||||||||
1987 | 20.54 | f | 27.19 | a | 32.74 | 46.43 | 53.48 | a | 63.65 | 68.82 | a | 63.66 | 55.91 | a | 40.32 | 32.58 | 20.34 | 45.92 | a | |||||||
1988 | 5.28 | b | 6.76 | 25.06 | 39.72 | 54.03 | 62.91 | c | 67.95 | a | 64.19 | 53.71 | a | 37.45 | 27.23 | b | 12.52 | a | 38.07 | |||||||
1989 | 14.64 | b | 3.40 | c | 21.05 | a | 37.90 | a | 49.89 | c | 59.23 | 68.63 | d | 65.32 | 57.24 | a | 45.10 | b | 22.53 | a | 2.43 | b | 37.28 | |||
1990 | 17.83 | b | 16.26 | a | 26.52 | 40.88 | a | 47.11 | 61.40 | a | 64.89 | 64.58 | 57.15 | 42.79 | 33.05 | 14.10 | 40.55 | |||||||||
1991 | 7.13 | 20.18 | 27.05 | 41.67 | 53.27 | 59.90 | 64.45 | 66.87 | e | 54.78 | 42.20 | a | 21.93 | 16.13 | 39.63 | |||||||||||
1992 | 15.16 | 21.98 | a | 26.92 | 36.23 | b | 54.82 | 56.82 | 60.42 | a | 60.84 | 55.55 | a | 42.50 | a | 28.12 | 17.11 | 39.71 | ||||||||
1993 | 11.52 | 14.21 | 26.08 | a | 36.57 | a | 49.24 | 55.45 | a | 63.32 | 65.82 | 50.42 | 40.95 | a | 25.53 | 17.76 | 38.07 | |||||||||
1994 | -2.82 | 7.29 | 30.14 | c | 40.98 | c | 52.48 | 61.59 | b | 63.98 | b | 62.60 | 58.33 | a | 48.08 | 33.33 | a | 20.59 | c | 39.71 | ||||||
1995 | 13.19 | 11.73 | b | 28.52 | 34.67 | a | 50.48 | c | 61.32 | 65.73 | 66.60 | 55.40 | 44.92 | a | 21.07 | a | 11.10 | 38.73 | ||||||||
1996 | -0.45 | b | 11.12 | a | 19.29 | 35.59 | c | 47.45 | 58.89 | c | 62.72 | a | 66.02 | a | 56.42 | 44.68 | a | 22.37 | 11.10 | a | 36.27 | |||||
1997 | 9.10 | a | 21.31 | b | 31.97 | a | 43.18 | 46.40 | u | 63.26 | k | 64.12 | a | 62.69 | e | 58.85 | 45.48 | 25.04 | b | 16.85 | u | 40.19 | c | |||
1998 | 15.18 | f | 30.08 | b | 29.15 | e | 43.54 | d | 55.29 | j | ----- | z | 66.70 | c | 67.43 | b | 59.77 | 47.18 | a | 33.18 | 19.92 | 44.11 | c | |||
1999 | 8.56 | 23.44 | a | 30.58 | a | 41.60 | a | 52.86 | c | 60.43 | g | 69.21 | c | 64.97 | a | 56.36 | a | 43.55 | b | 36.06 | v | 19.44 | d | 41.06 | b | |
2000 | 9.10 | e | 24.47 | m | 34.68 | i | 36.39 | h | 52.87 | d | 57.03 | m | 64.07 | c | 65.38 | a | 55.23 | 48.74 | b | 30.18 | b | 3.10 | a | 41.08 | d | |
2001 | 16.27 | a | 7.48 | g | 24.47 | a | 40.38 | a | 52.05 | b | 60.54 | f | 65.94 | 67.00 | b | 54.96 | b | 44.46 | c | ----- | z | 23.07 | a | 43.18 | c | |
2002 | 19.35 | a | 22.72 | c | 18.79 | b | 38.93 | b | 47.14 | b | 63.24 | g | 70.26 | d | 65.02 | g | 58.90 | f | 40.46 | c | 28.66 | b | 23.71 | b | 34.45 | c |
2003 | 12.32 | 12.40 | d | 26.83 | b | 40.12 | b | 50.82 | 62.57 | o | 68.42 | l | 70.69 | d | 58.65 | c | 46.40 | b | 30.63 | 22.75 | a | 37.16 | b | |||
2004 | 6.48 | 21.63 | b | 31.16 | b | 42.53 | a | 48.59 | b | 59.85 | f | 65.11 | c | 61.56 | f | 62.28 | a | 47.84 | 36.88 | a | 17.33 | a | 37.98 | b | ||
2005 | 9.13 | 22.56 | b | 25.67 | b | ----- | z | 48.60 | f | 63.37 | k | 69.67 | a | 66.23 | c | 62.45 | 48.57 | d | 34.45 | a | 21.35 | 40.01 | c | |||
2006 | 27.38 | a | 15.66 | c | 31.45 | c | 45.88 | a | 54.55 | c | 64.07 | h | 74.85 | d | 67.60 | e | 56.74 | a | 42.21 | b | 33.91 | a | 26.87 | 43.37 | a | |
2007 | 15.50 | e | 10.06 | a | 32.45 | 39.04 | f | 56.17 | d | 63.46 | d | 68.58 | 67.04 | c | 59.54 | b | 49.91 | b | 32.20 | b | 15.59 | b | 42.77 | a | ||
2008 | 12.34 | f | 14.91 | m | 23.15 | g | 38.98 | c | 49.24 | f | ----- | z | 64.83 | g | 64.82 | 57.43 | b | 45.04 | d | 29.63 | c | 8.03 | a | 40.66 | f | |
2009 | ----- | z | 17.04 | a | 26.88 | b | ----- | z | 51.33 | b | 58.08 | e | 62.87 | 61.19 | j | 61.62 | 40.08 | 37.58 | d | 13.13 | d | 40.96 | c | |||
2010 | 11.12 | b | 15.39 | a | 38.00 | c | 44.40 | a | 51.46 | e | 60.20 | c | 69.43 | a | 68.53 | b | 53.03 | 47.18 | 30.85 | c | 13.04 | d | 41.89 | |||
2011 | 6.81 | d | 15.38 | ----- | z | 40.28 | a | 47.22 | d | 56.91 | c | 70.22 | b | 67.13 | a | 55.88 | a | 48.61 | 33.43 | a | 21.94 | 42.16 | a | |||
2012 | 18.44 | 25.15 | b | 40.07 | b | 42.20 | 54.35 | a | 64.24 | c | 71.88 | a | 66.29 | 55.74 | e | 42.52 | c | 30.98 | b | 18.77 | a | 44.22 | ||||
2013 | ----- | z | 14.71 | 22.45 | c | 33.41 | b | ----- | z | ----- | z | 65.10 | g | 66.97 | b | 58.48 | d | 43.85 | 27.70 | 3.63 | a | 33.90 | d | |||
2014 | 0.33 | b | 4.02 | a | 17.69 | 33.55 | b | 49.37 | d | 58.13 | g | 64.07 | c | 63.35 | a | 56.57 | a | 42.77 | c | 20.04 | b | 21.43 | d | 33.93 | a | |
2015 | 13.05 | b | 3.42 | c | 30.61 | c | 39.57 | c | 49.15 | e | 59.38 | b | ----- | z | 63.30 | c | 59.93 | a | 45.06 | d | 36.03 | 25.95 | b | 38.68 | a | |
2016 | 12.27 | ----- | z | ----- | z | 37.18 | ----- | z | 62.17 | j | 67.02 | c | 66.57 | d | 59.44 | f | 47.23 | ----- | z | ----- | z | 46.06 | g | |||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | 48.67 | b | 59.05 | h | 64.22 | d | ----- | z | ----- | z | 46.57 | a | 26.59 | b | ----- | z | 46.51 | h |
2018 | 10.42 | a | ----- | z | 24.48 | e | ----- | z | ----- | z | 60.95 | h | 65.47 | k | 64.60 | u | ----- | z | ----- | z | ----- | z | ----- | z | 17.45 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 9.71 | 14.92 | 26.90 | 39.87 | 51.09 | 59.85 | 66.79 | 65.10 | 56.51 | 44.93 | 29.51 | 15.73 | 39.54 | |||||||||||||
S.D. | 6.04 | 6.77 | 5.15 | 3.25 | 2.88 | 2.76 | 2.94 | 2.55 | 2.74 | 3.09 | 4.11 | 6.27 | 1.66 | |||||||||||||
SKEW | 0.11 | 0.19 | 0.19 | -0.19 | 0.14 | -0.89 | 0.26 | -0.39 | -0.16 | -0.26 | -0.52 | -0.46 | 0.37 | |||||||||||||
MAX | 27.38 | 30.08 | 40.07 | 46.43 | 57.19 | 64.24 | 74.85 | 70.69 | 62.45 | 51.34 | 37.58 | 26.87 | 44.22 | |||||||||||||
MIN | -2.82 | 3.40 | 16.77 | 33.41 | 46.03 | 51.05 | 60.42 | 57.66 | 49.52 | 37.45 | 20.04 | 2.43 | 36.27 | |||||||||||||
YRS | 47 | 48 | 48 | 48 | 47 | 39 | 49 | 50 | 51 | 54 | 51 | 50 | 31 |