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 | 2.71 | g | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | 28.03 | 41.39 | 44.50 | 51.50 | a | 49.90 | 43.33 | 35.33 | a | 22.57 | -2.16 | 34.93 | c | |||||||
1965 | -8.10 | -6.32 | 4.57 | a | 27.70 | 37.55 | 43.21 | a | 48.39 | 50.16 | 40.13 | 33.77 | 19.77 | 14.65 | 25.46 | |||||||||||
1966 | -13.65 | 0.43 | 17.65 | 26.47 | 32.52 | 46.10 | 55.74 | 51.13 | 42.77 | 33.10 | b | 17.73 | 4.94 | 26.24 | ||||||||||||
1967 | 0.97 | -7.43 | 15.81 | 27.03 | 31.32 | 46.20 | 53.06 | 49.39 | 43.37 | 33.74 | 18.80 | 8.94 | 26.77 | |||||||||||||
1968 | -0.23 | -1.72 | 20.81 | 30.57 | 35.71 | 46.03 | 53.52 | 49.50 | a | 48.30 | 39.00 | 23.43 | 3.68 | 29.05 | ||||||||||||
1969 | -3.00 | 2.93 | 10.77 | 28.30 | 37.23 | 41.00 | 51.03 | 54.84 | 46.40 | 34.23 | 21.37 | 12.35 | 28.12 | |||||||||||||
1970 | -6.42 | -0.89 | a | 7.13 | 28.97 | 37.58 | 47.47 | 55.80 | a | 53.19 | 46.50 | 35.65 | 21.60 | 4.26 | 27.57 | |||||||||||
1971 | -9.61 | 1.96 | 12.10 | 26.63 | 34.03 | 48.20 | 50.39 | 48.80 | a | 46.87 | 40.19 | 23.59 | a | 5.16 | 27.36 | |||||||||||
1972 | -10.39 | -4.10 | 8.42 | 24.63 | 37.61 | 43.97 | 51.03 | 52.52 | 42.69 | a | 32.94 | 24.93 | 1.29 | 25.46 | ||||||||||||
1973 | 3.39 | 4.89 | 25.26 | 27.67 | 35.42 | 47.10 | 53.52 | 56.37 | a | 44.00 | 40.94 | 23.30 | 4.23 | 30.51 | ||||||||||||
1974 | -1.00 | -1.85 | a | 14.97 | 27.30 | 35.23 | 47.40 | 55.74 | 50.58 | 40.33 | 33.06 | 26.03 | 14.70 | a | 28.54 | |||||||||||
1975 | 1.16 | 4.93 | 9.65 | 22.47 | 39.10 | 46.83 | 58.35 | 52.00 | 41.63 | 35.84 | 21.34 | a | 2.42 | 27.98 | ||||||||||||
1976 | -5.23 | 12.34 | 14.52 | 29.37 | 32.70 | a | 49.10 | 52.87 | 50.81 | 41.57 | 26.13 | 13.30 | -5.13 | 26.03 | ||||||||||||
1977 | -11.10 | 7.29 | 23.87 | 30.34 | a | 42.42 | 47.53 | 54.97 | 48.58 | 46.17 | 34.65 | 20.57 | 5.94 | 29.27 | ||||||||||||
1978 | -5.45 | -3.89 | a | 14.77 | 27.80 | 38.39 | 47.37 | 53.58 | 53.35 | 48.70 | 35.94 | 18.97 | -0.03 | 27.46 | ||||||||||||
1979 | -11.68 | -8.61 | 15.60 | a | 25.93 | 34.97 | 45.00 | 53.19 | 50.84 | 46.07 | 32.42 | 21.90 | 13.94 | 26.63 | ||||||||||||
1980 | 0.58 | 1.86 | 9.65 | 28.77 | 39.00 | 46.53 | 53.74 | 54.00 | a | 44.93 | 31.30 | a | 23.57 | 4.39 | 28.19 | |||||||||||
1981 | 1.87 | 7.96 | 19.63 | a | 31.20 | 36.29 | 47.33 | 54.35 | 54.03 | 40.93 | a | 32.13 | a | 25.33 | ----- | z | 31.92 | a | ||||||||
1982 | -19.07 | d | -5.00 | b | 3.71 | g | 22.65 | g | 37.23 | e | 39.07 | b | 51.28 | f | 46.45 | b | 45.00 | 37.42 | 17.27 | 12.48 | 23.43 | c | ||||
1983 | 4.77 | a | 15.11 | 21.83 | a | 25.37 | 31.00 | a | 42.55 | a | 53.65 | 55.68 | 47.00 | 34.16 | 23.32 | b | -9.86 | c | 28.71 | |||||||
1984 | -3.26 | 16.10 | 9.83 | a | 28.07 | 36.30 | a | 44.83 | 51.77 | 53.06 | 37.66 | a | 35.39 | 16.83 | 2.87 | 27.46 | ||||||||||
1985 | -4.40 | a | -2.96 | 16.48 | 30.38 | a | 37.16 | 39.00 | 48.00 | 46.45 | 40.20 | 29.68 | 9.63 | c | -10.77 | a | 23.24 | |||||||||
1986 | -2.87 | -0.29 | 16.48 | 28.13 | 34.17 | a | 43.73 | 52.10 | 48.10 | 42.50 | 30.97 | a | 14.80 | 8.68 | 26.37 | |||||||||||
1987 | 8.62 | e | 13.43 | 19.03 | 25.60 | 36.65 | 44.67 | 52.13 | a | 47.29 | 39.27 | 25.87 | 18.97 | 8.74 | 28.35 | |||||||||||
1988 | -10.21 | b | -10.62 | 10.58 | 20.57 | 31.97 | 41.14 | a | 46.10 | 48.13 | 36.33 | 20.77 | 14.53 | -4.29 | 20.42 | |||||||||||
1989 | -3.50 | a | -13.78 | a | 7.23 | a | 24.30 | 32.70 | a | 43.37 | 53.14 | b | 50.90 | 41.45 | a | 30.30 | a | 13.03 | a | -8.52 | b | 22.55 | ||||
1990 | 5.73 | a | 2.32 | 15.00 | 26.77 | 31.90 | 45.72 | a | 52.23 | 52.06 | 45.30 | 30.74 | 22.60 | 4.23 | 27.88 | |||||||||||
1991 | -3.90 | 7.96 | 16.81 | 28.60 | 40.55 | 47.17 | 53.61 | 54.38 | e | 44.33 | 31.52 | 14.03 | 5.90 | 28.41 | ||||||||||||
1992 | 4.77 | 13.52 | 17.58 | 26.21 | b | 39.61 | 43.70 | 48.90 | a | 49.74 | 44.41 | a | 31.53 | a | 23.13 | 8.52 | 29.30 | |||||||||
1993 | 1.16 | 3.64 | 14.90 | a | 25.34 | a | 36.90 | 44.31 | a | 53.06 | 55.10 | 40.20 | 28.40 | a | 17.53 | 10.65 | 27.60 | |||||||||
1994 | -14.23 | -4.39 | 19.89 | c | 29.59 | c | 36.94 | 48.07 | a | 52.79 | b | 51.52 | 48.03 | a | 39.00 | 23.93 | 11.17 | b | 28.53 | |||||||
1995 | 4.84 | 0.70 | a | 19.32 | 24.41 | a | 36.93 | c | 48.37 | 53.48 | 56.19 | 43.80 | 36.33 | a | 13.03 | a | 2.13 | 28.30 | ||||||||
1996 | -14.07 | a | 0.43 | a | 8.65 | 24.07 | c | 33.39 | 45.81 | c | 50.87 | 54.35 | 46.20 | 33.67 | a | 14.40 | 2.77 | a | 25.05 | |||||||
1997 | -0.48 | 10.77 | b | 24.27 | a | 32.20 | 28.90 | u | 48.47 | k | 51.84 | 50.88 | e | 48.13 | 34.74 | 16.86 | b | 7.90 | u | 29.91 | c | |||||
1998 | 7.04 | f | 21.85 | b | 19.77 | e | 29.23 | d | 39.05 | j | ----- | z | 54.25 | c | 54.93 | b | 46.53 | 35.63 | a | 25.40 | 9.32 | 32.99 | c | |||
1999 | -2.03 | 11.63 | a | 18.30 | a | 29.59 | a | 39.50 | c | 48.43 | g | 56.71 | c | 53.97 | a | 45.45 | a | 32.00 | b | 22.38 | v | 9.89 | d | 29.50 | b | |
2000 | -3.12 | e | 14.19 | m | 22.55 | i | 25.91 | h | 37.93 | d | 44.06 | l | 52.50 | c | 53.77 | a | 42.50 | 35.60 | a | 24.04 | b | -6.84 | 29.55 | d | ||
2001 | 5.60 | a | -5.29 | g | 12.47 | a | 30.03 | a | 39.62 | b | 48.88 | f | 52.65 | 53.79 | b | 42.61 | b | 33.38 | b | ----- | z | 14.33 | a | 31.61 | c | |
2002 | 9.57 | a | 11.44 | c | 6.59 | b | 28.43 | b | 33.24 | b | 49.35 | g | 58.48 | d | 54.17 | g | 47.72 | e | 32.07 | c | 19.18 | b | 15.90 | b | 26.26 | b |
2003 | 2.45 | 0.25 | d | 15.17 | b | 28.10 | a | 36.87 | 46.47 | o | 56.26 | l | 58.56 | d | 47.67 | c | 34.38 | b | 22.67 | 13.17 | a | 25.93 | b | |||
2004 | -3.35 | 10.86 | a | 21.76 | b | 29.62 | a | 36.38 | b | 46.60 | e | 52.54 | c | 50.76 | f | 51.63 | 38.42 | 27.52 | a | 7.57 | a | 29.05 | a | |||
2005 | -2.52 | 12.23 | b | 12.79 | b | ----- | z | 37.92 | f | 50.16 | k | 57.40 | a | 53.89 | c | 50.37 | 37.93 | d | 24.48 | a | 15.35 | 29.10 | c | |||
2006 | 20.10 | a | 3.96 | c | 20.07 | b | 33.62 | a | 42.46 | c | 50.23 | h | 60.64 | c | 55.54 | e | 44.45 | a | 30.41 | b | 24.48 | a | 19.29 | 32.28 | a | |
2007 | 5.88 | e | -0.41 | a | 20.94 | 25.88 | e | 41.67 | d | 49.41 | c | 54.90 | 54.54 | c | 47.11 | b | 39.97 | b | 24.71 | b | 6.93 | b | 30.96 | |||
2008 | 3.40 | f | 1.25 | m | 9.67 | g | 28.89 | b | 33.40 | f | ----- | z | 51.40 | f | 50.68 | 45.89 | b | 33.71 | c | 21.21 | b | -3.60 | a | 29.47 | f | |
2009 | ----- | z | 5.11 | a | 16.93 | a | ----- | z | 35.17 | b | 43.88 | e | 50.23 | 48.86 | j | 48.97 | 32.45 | 27.81 | d | 3.74 | d | 29.37 | c | |||
2010 | -0.53 | a | 0.37 | a | 24.82 | c | 29.69 | a | 36.00 | e | 48.37 | c | 57.50 | a | 57.86 | b | 42.27 | 34.55 | 21.33 | c | 3.89 | d | 29.68 | |||
2011 | -3.07 | c | 3.61 | ----- | z | 29.72 | a | 33.93 | d | 44.81 | c | 57.10 | b | 55.30 | a | 43.31 | a | 36.45 | 23.59 | a | 12.77 | 30.68 | a | |||
2012 | 9.39 | 16.63 | b | 28.00 | b | 29.73 | 41.73 | a | 50.37 | c | 59.53 | a | 52.55 | 39.88 | e | 31.25 | c | 21.57 | b | 8.80 | a | 32.45 | ||||
2013 | ----- | z | 4.14 | 9.71 | c | 24.11 | b | ----- | z | ----- | z | 52.17 | g | 54.10 | b | 46.46 | d | 35.39 | 19.07 | -6.50 | a | 23.31 | d | |||
2014 | -10.41 | b | -7.48 | a | 5.81 | 24.04 | b | 36.59 | d | 44.74 | g | 52.00 | c | 53.13 | a | 45.72 | a | 32.11 | c | 12.29 | b | 15.52 | d | 23.57 | a | |
2015 | 5.10 | b | -7.00 | c | 18.04 | c | 26.70 | c | 35.35 | e | 46.04 | b | ----- | z | 51.86 | b | 49.21 | a | 34.30 | d | 27.17 | 20.40 | a | 27.92 | a | |
2016 | 3.39 | ----- | z | ----- | z | 27.57 | ----- | z | 48.45 | j | 55.75 | c | 55.33 | d | 49.75 | f | 37.45 | ----- | z | ----- | z | 35.90 | g | |||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | 37.34 | b | 43.52 | g | 52.07 | d | ----- | z | ----- | z | 37.23 | a | 17.96 | b | ----- | z | 36.15 | h |
2018 | -0.03 | a | ----- | z | 12.42 | e | ----- | z | ----- | z | 47.00 | h | 52.60 | k | 49.70 | u | ----- | z | ----- | z | ----- | z | ----- | z | 6.19 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -1.79 | 3.00 | 15.55 | 27.63 | 36.58 | 45.55 | 53.44 | 52.40 | 44.47 | 33.81 | 20.52 | 5.96 | 27.45 | |||||||||||||
S.D. | 7.41 | 7.96 | 5.65 | 2.53 | 2.95 | 2.62 | 2.93 | 2.87 | 3.30 | 3.69 | 4.40 | 7.59 | 2.37 | |||||||||||||
SKEW | 0.11 | 0.19 | 0.02 | -0.34 | 0.12 | -0.67 | 0.17 | -0.18 | -0.22 | -0.79 | -0.52 | -0.37 | -0.82 | |||||||||||||
MAX | 20.10 | 21.85 | 28.00 | 33.62 | 42.46 | 50.37 | 60.64 | 58.56 | 51.63 | 40.94 | 27.81 | 20.40 | 32.45 | |||||||||||||
MIN | -19.07 | -13.78 | 4.57 | 20.57 | 31.00 | 39.00 | 46.10 | 46.45 | 36.33 | 20.77 | 9.63 | -10.77 | 20.42 | |||||||||||||
YRS | 49 | 48 | 48 | 49 | 48 | 40 | 49 | 50 | 52 | 54 | 51 | 50 | 33 |