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 | 21.56 | f | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | 51.70 | 69.84 | 74.13 | 85.48 | 76.84 | 67.17 | 58.03 | 42.20 | 22.16 | 60.84 | c | |||||||||
1965 | 19.03 | 21.68 | 29.35 | 48.90 | 67.07 | a | 70.80 | 75.71 | 76.68 | 58.90 | 58.65 | 38.77 | 31.06 | 49.72 | ||||||||||||
1966 | 12.84 | 25.50 | 39.55 | 46.23 | 64.32 | 77.13 | 83.32 | 75.54 | c | 69.23 | 56.53 | a | 37.50 | 24.48 | 51.02 | |||||||||||
1967 | 23.03 | 19.50 | 38.23 | 50.67 | 60.74 | 71.73 | 79.52 | 77.55 | 72.00 | 56.39 | 37.47 | 28.26 | 51.26 | |||||||||||||
1968 | 22.48 | 24.69 | 47.13 | 54.70 | 61.19 | 72.17 | a | 79.45 | 78.17 | a | 69.63 | 59.94 | 39.10 | a | 23.55 | 52.68 | ||||||||||
1969 | 18.32 | 27.14 | 34.68 | 53.73 | 67.35 | 68.87 | 78.52 | 83.87 | 69.60 | 51.81 | 39.00 | 28.06 | 51.75 | |||||||||||||
1970 | 15.77 | 25.36 | 34.90 | 48.69 | a | 58.90 | 77.40 | 84.80 | a | 81.42 | 69.97 | 57.74 | 37.20 | 24.42 | 51.38 | |||||||||||
1971 | 14.39 | 25.46 | 35.39 | 53.10 | 65.58 | 77.50 | 77.48 | 77.29 | 70.50 | 60.03 | 37.87 | 25.71 | 51.69 | |||||||||||||
1972 | 15.16 | 20.17 | 30.74 | 46.17 | 68.06 | 75.97 | 76.84 | 77.19 | 66.60 | 52.52 | 35.63 | 19.13 | 48.68 | |||||||||||||
1973 | 26.55 | 29.21 | 42.84 | 52.47 | 61.52 | 74.90 | a | 80.94 | 80.43 | a | 67.43 | 61.74 | 38.63 | 24.74 | 53.45 | |||||||||||
1974 | 20.77 | a | 26.11 | a | 34.74 | 54.83 | 61.45 | 76.20 | 85.60 | a | 75.84 | 64.63 | 58.48 | 40.87 | 31.26 | 52.57 | ||||||||||
1975 | 23.58 | 27.50 | 33.65 | 44.60 | 70.23 | 73.30 | 84.16 | 78.39 | 66.20 | 60.26 | 43.43 | 24.19 | 52.46 | |||||||||||||
1976 | 19.74 | 35.79 | a | 36.16 | 59.28 | a | 68.16 | 78.40 | 84.03 | 82.90 | 72.93 | 51.90 | 34.93 | 18.10 | 53.53 | |||||||||||
1977 | 11.90 | 30.89 | 42.97 | a | 59.14 | a | 71.97 | 76.40 | 83.26 | 74.13 | 66.47 | 58.16 | 39.70 | 22.19 | 53.10 | |||||||||||
1978 | 17.87 | 23.41 | a | 40.48 | 51.03 | 70.90 | 75.60 | 77.13 | 77.35 | 70.80 | 59.29 | 39.13 | 22.29 | 52.11 | ||||||||||||
1979 | 11.42 | 18.04 | 33.43 | a | 45.73 | 61.03 | 75.57 | 79.90 | 73.81 | 70.10 | 53.29 | 37.93 | 33.10 | 49.45 | ||||||||||||
1980 | 21.84 | 25.83 | 34.53 | a | 57.47 | 71.23 | 75.27 | 84.13 | 77.55 | b | 66.03 | 51.45 | 41.60 | 25.19 | 52.68 | |||||||||||
1981 | 27.32 | 29.00 | 43.28 | b | 53.30 | 66.77 | 72.77 | 80.32 | 77.81 | 64.17 | 45.67 | a | 39.27 | ----- | z | 54.52 | a | |||||||||
1982 | 5.73 | e | 16.78 | a | 27.59 | b | 42.33 | 57.40 | a | 62.90 | 70.30 | a | 69.26 | 68.62 | a | 58.10 | a | 36.38 | a | 29.23 | a | 45.38 | ||||
1983 | 25.06 | 30.89 | 34.97 | 48.03 | 61.37 | a | 72.97 | 83.27 | a | 83.29 | 69.80 | 55.23 | 39.40 | 15.70 | a | 51.66 | ||||||||||
1984 | 24.03 | b | 35.31 | 31.45 | 53.27 | 64.97 | 73.93 | a | 80.19 | 81.13 | 67.10 | 57.19 | 41.50 | 27.86 | b | 53.16 | ||||||||||
1985 | 21.10 | a | 24.30 | a | 42.61 | 56.33 | 68.77 | 71.97 | 79.61 | 73.32 | 66.93 | 57.55 | 31.80 | 17.68 | 51.00 | |||||||||||
1986 | 25.13 | 25.07 | 41.39 | 54.77 | 66.97 | a | 75.13 | 77.65 | 75.16 | 65.10 | 58.55 | 38.14 | a | 30.86 | b | 52.83 | ||||||||||
1987 | 30.33 | a | 40.74 | a | 46.45 | 67.27 | 70.27 | a | 82.63 | 85.45 | 80.03 | 73.00 | a | 54.77 | 46.20 | 31.94 | 59.09 | |||||||||
1988 | 20.90 | a | 24.14 | 39.55 | 58.87 | 76.10 | 84.54 | b | 90.07 | a | 80.26 | 71.10 | a | 54.13 | 40.18 | b | 28.63 | a | 55.70 | |||||||
1989 | 31.70 | a | 19.04 | b | 34.39 | 51.72 | a | 67.72 | b | 75.10 | 83.76 | b | 79.74 | 73.03 | a | 60.10 | b | 32.23 | 14.16 | 51.89 | ||||||
1990 | 29.90 | a | 30.07 | a | 38.03 | 55.03 | a | 62.32 | 77.07 | a | 77.55 | 77.10 | 69.00 | 54.84 | 43.50 | 23.97 | 53.20 | |||||||||
1991 | 18.16 | 32.39 | 37.29 | 54.73 | 66.00 | 72.63 | 75.29 | 79.61 | 65.23 | 52.53 | a | 29.83 | 26.35 | 50.84 | ||||||||||||
1992 | 25.55 | 30.21 | a | 36.26 | 46.21 | a | 70.03 | 69.93 | 72.03 | 71.94 | 66.69 | a | 53.47 | a | 33.10 | 25.71 | 50.09 | |||||||||
1993 | 21.87 | 24.79 | 37.16 | 47.79 | a | 61.58 | 66.59 | a | 73.58 | 76.55 | 60.63 | 53.50 | a | 33.53 | 24.87 | 48.54 | ||||||||||
1994 | 8.58 | 18.96 | 40.39 | c | 52.83 | a | 68.03 | 74.93 | b | 75.30 | a | 73.68 | 68.62 | a | 57.16 | 42.90 | a | 30.25 | c | 50.97 | ||||||
1995 | 21.55 | 23.27 | b | 37.71 | 44.93 | a | 64.04 | c | 74.27 | 77.97 | 77.00 | 67.00 | 53.50 | a | 29.10 | a | 20.06 | 49.20 | ||||||||
1996 | 12.93 | b | 21.79 | 29.94 | 47.11 | c | 61.52 | 71.96 | c | 74.43 | a | 78.30 | a | 66.63 | 56.10 | 30.33 | 19.52 | 47.55 | ||||||||
1997 | 18.10 | a | 31.85 | b | 39.67 | a | 54.17 | 63.90 | u | 78.05 | k | 76.40 | a | 73.86 | b | 69.57 | 56.23 | 33.57 | 25.71 | j | 50.38 | c | ||||
1998 | 23.32 | f | 38.31 | b | 37.38 | b | 57.59 | c | 71.52 | j | ----- | z | 79.14 | c | 79.93 | b | 73.00 | 58.73 | a | 40.97 | 30.52 | 55.06 | c | |||
1999 | 19.16 | 35.26 | a | 42.87 | a | 53.62 | a | 66.21 | c | 72.88 | f | 81.71 | c | 75.97 | a | 67.50 | 55.10 | b | 53.45 | s | 30.20 | a | 52.76 | b | ||
2000 | 22.76 | b | 36.10 | h | 45.79 | c | 50.57 | b | 67.71 | c | 69.59 | m | 75.97 | b | 77.00 | a | 67.97 | 61.59 | b | 36.32 | b | 13.03 | a | 51.87 | b | |
2001 | 26.93 | a | 20.24 | g | 36.47 | a | 50.72 | a | 64.48 | b | 72.21 | f | 79.23 | 80.21 | b | 67.32 | b | 55.50 | c | ----- | z | 31.80 | a | 54.74 | c | |
2002 | 29.13 | a | 34.00 | c | 31.00 | b | 49.43 | b | 61.63 | a | 77.13 | g | 82.04 | d | 75.88 | g | 70.33 | f | 48.86 | c | 38.14 | b | 31.52 | b | 45.08 | c |
2003 | 22.19 | 24.54 | d | 38.48 | b | 52.43 | b | 64.77 | 78.38 | n | 80.58 | l | 82.81 | d | 70.03 | a | 58.41 | b | 38.60 | 32.33 | a | 48.46 | b | |||
2004 | 16.32 | 32.44 | b | 40.55 | b | 55.45 | a | 60.79 | b | 73.17 | f | 77.68 | c | 72.92 | e | 72.97 | a | 57.26 | 46.24 | a | 27.10 | a | 50.88 | a | ||
2005 | 20.77 | 32.88 | b | 38.55 | b | ----- | z | 59.28 | f | 76.58 | k | 81.93 | a | 78.57 | c | 74.53 | 59.61 | c | 44.41 | a | 27.35 | 50.96 | c | |||
2006 | 34.65 | 27.36 | c | 42.25 | c | 58.14 | a | 66.64 | c | 77.91 | h | 89.15 | d | 79.65 | e | 69.03 | a | 54.00 | b | 43.34 | a | 34.45 | 54.42 | a | ||
2007 | 25.12 | e | 20.52 | a | 43.97 | 52.58 | f | 70.67 | d | 78.08 | d | 82.26 | 79.38 | b | 71.96 | b | 59.86 | b | 39.68 | b | 24.07 | a | 54.14 | a | ||
2008 | 21.88 | e | 28.56 | m | 37.08 | e | 49.04 | c | 64.23 | e | ----- | z | 78.04 | g | 78.97 | 68.96 | b | 55.89 | c | 38.07 | c | 19.67 | a | 48.20 | c | |
2009 | ----- | z | 28.96 | a | 37.24 | b | ----- | z | 67.48 | b | 72.28 | e | 75.52 | 73.52 | j | 74.27 | 47.71 | 47.35 | d | 22.61 | c | 52.60 | c | |||
2010 | 21.97 | b | 30.41 | a | 51.18 | c | 59.10 | a | 67.81 | d | 72.04 | c | 81.37 | a | 79.21 | b | 63.80 | 59.81 | 40.37 | c | 22.39 | c | 54.12 | |||
2011 | 16.22 | d | 27.14 | ----- | z | 50.83 | a | 60.52 | d | 69.00 | c | 83.34 | b | 78.97 | a | 68.45 | a | 60.77 | 43.28 | a | 31.10 | 53.60 | a | |||
2012 | 27.48 | 33.67 | b | 52.14 | b | 54.67 | 66.97 | a | 78.11 | c | 84.23 | a | 80.03 | 71.60 | e | 53.79 | c | 40.39 | b | 28.73 | a | 55.98 | ||||
2013 | ----- | z | 25.29 | 35.18 | c | 42.71 | b | ----- | z | ----- | z | 78.58 | e | 79.83 | b | 70.50 | d | 52.32 | 36.33 | 13.77 | a | 48.28 | c | |||
2014 | 11.07 | b | 15.64 | 29.58 | 42.80 | 62.15 | d | 71.54 | f | 76.14 | c | 73.57 | a | 67.41 | a | 53.43 | c | 27.79 | b | 27.33 | d | 44.26 | a | |||
2015 | 21.03 | a | 14.56 | a | 43.18 | c | 52.44 | c | 63.11 | c | 72.71 | b | ----- | z | 75.28 | b | 70.66 | a | 56.25 | c | 44.90 | 31.43 | a | 49.60 | a | |
2016 | 21.16 | ----- | z | ----- | z | 46.80 | ----- | z | 75.90 | j | 78.29 | c | 77.81 | d | 69.12 | f | 57.00 | ----- | z | ----- | z | 56.21 | g | |||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | 60.00 | b | 74.59 | h | 76.37 | d | ----- | z | ----- | z | 55.90 | a | 35.21 | b | ----- | z | 56.87 | h |
2018 | 20.87 | a | ----- | z | 36.54 | e | ----- | z | ----- | z | 74.91 | h | 78.35 | k | 79.50 | u | ----- | z | ----- | z | ----- | z | ----- | z | 28.70 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.83 | 26.79 | 38.16 | 51.87 | 65.48 | 74.18 | 79.93 | 77.71 | 68.64 | 56.05 | 38.50 | 25.48 | 51.78 | |||||||||||||
S.D. | 6.00 | 5.99 | 5.34 | 5.08 | 4.00 | 3.95 | 4.17 | 3.04 | 3.20 | 3.46 | 4.48 | 5.41 | 2.55 | |||||||||||||
SKEW | -0.20 | 0.07 | 0.40 | 0.28 | 0.18 | -0.12 | 0.14 | -0.32 | -0.56 | -0.71 | -0.34 | -0.54 | 0.21 | |||||||||||||
MAX | 34.65 | 40.74 | 52.14 | 67.27 | 76.10 | 84.54 | 90.07 | 83.87 | 74.53 | 61.74 | 47.35 | 34.45 | 59.09 | |||||||||||||
MIN | 5.73 | 14.56 | 27.59 | 42.33 | 57.40 | 62.90 | 70.30 | 69.26 | 58.90 | 45.67 | 27.79 | 13.03 | 45.38 | |||||||||||||
YRS | 50 | 48 | 51 | 50 | 49 | 39 | 51 | 51 | 51 | 54 | 51 | 50 | 33 |