YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.61 | l | 64.40 | 59.37 | 41.19 | 32.52 | 23.55 | 44.21 | g | |||||
1953 | 17.42 | 16.54 | 28.35 | 36.92 | 50.62 | a | 63.38 | b | 66.65 | 68.45 | 57.90 | 53.93 | a | 36.85 | 20.61 | 43.13 | ||||||||||
1954 | 10.76 | 27.95 | 23.66 | 41.18 | 46.55 | 64.32 | 66.79 | 63.32 | 54.73 | 44.21 | 34.08 | 22.35 | 41.66 | |||||||||||||
1955 | 13.76 | 14.36 | 21.27 | 47.77 | 56.35 | 63.10 | 71.24 | 69.24 | 57.88 | 48.90 | 25.28 | 13.48 | 41.89 | |||||||||||||
1956 | 16.97 | 16.69 | 24.24 | 37.83 | c | 52.82 | f | 65.32 | 62.44 | 63.98 | 54.14 | a | 53.88 | a | 31.70 | 20.48 | 40.70 | a | ||||||||
1957 | 7.27 | 16.20 | 24.79 | 42.20 | 52.23 | 61.18 | 68.29 | 65.35 | 55.60 | 46.77 | 31.53 | 20.92 | 41.03 | |||||||||||||
1958 | 19.44 | 12.75 | 27.24 | 43.33 | 52.73 | 58.45 | b | 65.15 | 64.73 | 59.02 | 48.42 | 32.93 | 11.15 | 41.28 | ||||||||||||
1959 | 6.23 | 13.02 | 27.56 | 40.48 | 55.21 | 64.48 | 68.61 | 68.06 | 58.55 | 42.68 | 22.80 | 26.32 | 41.17 | |||||||||||||
1960 | 14.73 | 17.50 | a | 18.74 | 44.73 | f | 50.50 | 60.47 | 65.98 | 67.23 | 58.27 | 47.94 | 34.92 | 15.55 | 41.07 | a | ||||||||||
1961 | 12.00 | 23.48 | 30.26 | 38.45 | 50.27 | 62.70 | 65.85 | 68.11 | 57.82 | 48.35 | 32.53 | 17.31 | 42.26 | |||||||||||||
1962 | 8.84 | 11.46 | 28.06 | 37.85 | 55.56 | 60.41 | a | 64.48 | 65.58 | 55.12 | a | 48.47 | a | 34.78 | 17.50 | 40.68 | ||||||||||
1963 | 4.13 | 8.80 | 29.02 | 42.85 | 51.13 | 64.10 | 69.13 | 63.31 | 58.80 | 57.52 | 36.67 | 12.02 | 41.46 | |||||||||||||
1964 | 22.00 | 20.28 | 23.40 | 40.97 | 58.60 | 61.63 | 68.87 | a | 62.39 | 55.22 | 46.66 | 33.77 | 12.65 | a | 42.20 | |||||||||||
1965 | 8.69 | 8.48 | b | 15.67 | y | 40.02 | c | 57.21 | b | 61.55 | a | 64.65 | 64.44 | 52.47 | 48.39 | 31.64 | a | 25.47 | 42.09 | a | ||||||
1966 | 6.30 | a | 17.07 | a | 32.63 | 39.15 | 49.60 | 65.88 | 71.24 | 63.98 | a | 56.85 | 46.50 | 30.60 | 18.65 | 41.54 | ||||||||||
1967 | 15.85 | 8.98 | 28.65 | 40.88 | 46.76 | 60.48 | 64.62 | a | 63.58 | 58.48 | 44.73 | 29.08 | 21.03 | 40.26 | ||||||||||||
1968 | 12.89 | 12.83 | 34.61 | 43.03 | 49.63 | 59.12 | 66.55 | 64.53 | 58.60 | 49.58 | 31.87 | 17.02 | 41.69 | |||||||||||||
1969 | 13.23 | 17.16 | 22.16 | 41.88 | 52.71 | 54.41 | a | 64.37 | 68.35 | a | 57.63 | 43.81 | 32.22 | a | 21.27 | 40.77 | ||||||||||
1970 | 6.85 | 12.80 | 22.52 | 42.12 | a | 48.58 | a | 62.45 | a | 69.53 | 66.66 | 57.53 | 48.87 | 31.33 | 17.24 | 40.54 | ||||||||||
1971 | 6.02 | 14.36 | 24.02 | 40.02 | 48.52 | 64.72 | 63.76 | 62.08 | a | 58.45 | a | 51.63 | 32.17 | 18.85 | 40.38 | |||||||||||
1972 | 5.21 | c | 8.66 | 20.00 | 34.75 | 55.95 | 59.15 | 64.03 | 63.47 | a | 53.20 | 42.66 | 30.83 | 13.60 | a | 37.63 | ||||||||||
1973 | 18.65 | 18.00 | a | 34.53 | 39.40 | a | 47.95 | a | 63.00 | 66.16 | 67.76 | 55.32 | 51.55 | 31.93 | 17.29 | 42.63 | ||||||||||
1974 | 12.38 | a | 13.63 | a | 27.26 | 40.02 | 50.89 | 57.59 | h | 70.17 | a | 63.52 | 50.98 | b | 47.53 | a | 34.92 | 25.84 | 39.74 | a | ||||||
1975 | 15.90 | 18.79 | 25.03 | 35.18 | 56.87 | 63.30 | 68.65 | h | 65.42 | g | 53.16 | a | 49.61 | 36.43 | 17.68 | 37.20 | b | |||||||||
1976 | 11.60 | 25.86 | 28.08 | 45.30 | 51.13 | 65.30 | 66.98 | 68.03 | 56.53 | ----- | z | ----- | z | ----- | z | 46.54 | c | |||||||||
1977 | 2.92 | 20.05 | 35.19 | 45.98 | 62.47 | 61.73 | 67.11 | q | 60.53 | a | 56.27 | 46.24 | 33.42 | 17.30 | a | 40.19 | a | |||||||||
1978 | 8.53 | 12.20 | 26.71 | 38.45 | a | 54.95 | 61.03 | 65.39 | 65.18 | a | 60.21 | b | 48.06 | 30.73 | 13.94 | 40.45 | ||||||||||
1979 | 3.08 | 8.68 | 27.77 | 38.88 | 48.10 | 59.87 | 66.83 | a | 63.03 | 59.03 | 43.37 | a | 32.57 | 25.08 | 39.69 | |||||||||||
1980 | 13.34 | 11.50 | g | 23.87 | a | 43.83 | c | 56.53 | 60.98 | 68.74 | 66.71 | 56.16 | a | 43.55 | a | 34.52 | a | 16.85 | 44.10 | a | ||||||
1981 | 16.10 | 21.50 | 31.19 | 44.02 | 51.92 | 62.18 | 67.26 | 66.93 | a | 55.54 | b | 43.87 | 38.14 | a | 21.56 | 43.35 | ||||||||||
1982 | 2.98 | b | 14.84 | c | 28.77 | 40.50 | b | 57.06 | e | 56.19 | c | 68.26 | 62.81 | b | 55.94 | c | 48.37 | e | 31.89 | c | 25.90 | b | 41.13 | |||
1983 | 20.52 | c | 26.79 | 31.18 | 37.39 | b | 49.03 | b | 61.04 | f | 73.25 | c | 71.53 | a | 60.37 | c | 46.88 | a | 34.33 | d | 8.33 | d | 41.78 | a | ||
1984 | 10.69 | d | 27.69 | c | 20.89 | c | 43.30 | b | 50.52 | a | 63.05 | a | 65.65 | a | 67.33 | d | 54.32 | b | 50.98 | e | 36.35 | d | 20.12 | a | 42.57 | |
1985 | 15.40 | e | 15.55 | 34.83 | a | 45.28 | a | 54.73 | e | 59.27 | b | 63.41 | d | 62.55 | a | 57.17 | d | 47.38 | b | 27.20 | g | 8.13 | d | 42.15 | a | |
1986 | 15.85 | h | 15.59 | e | 32.81 | d | 46.33 | d | 51.89 | c | 60.20 | b | 68.04 | e | 60.29 | j | 54.62 | i | 47.44 | d | 33.21 | i | 26.21 | g | 46.04 | e |
1987 | 24.02 | 30.83 | d | 35.88 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.42 | j | |
1988 | 9.39 | 9.33 | 26.43 | a | 41.28 | a | 59.26 | b | 65.53 | 70.42 | a | 66.95 | a | 57.53 | 40.00 | 31.72 | a | 16.74 | 41.22 | |||||||
1989 | 18.97 | 7.68 | 21.32 | 38.58 | 52.35 | 59.10 | 67.85 | 66.06 | 57.23 | 46.81 | 25.79 | a | 5.74 | 38.96 | ||||||||||||
1990 | 22.35 | 18.57 | 31.00 | 44.14 | a | 48.82 | 62.43 | 62.42 | 62.52 | 55.42 | 42.74 | 34.93 | 16.73 | 41.84 | ||||||||||||
1991 | 9.19 | 21.29 | 28.85 | 45.38 | 57.08 | 63.62 | 66.13 | 66.84 | 55.25 | 42.92 | 25.45 | 19.15 | 41.76 | |||||||||||||
1992 | 17.87 | 22.29 | 26.18 | 37.48 | 55.68 | 58.50 | a | 60.19 | 61.50 | b | 55.22 | 43.04 | c | 28.72 | 18.53 | 40.43 | ||||||||||
1993 | 13.63 | 14.84 | 25.13 | a | 36.00 | a | 51.75 | a | 58.57 | a | 65.89 | 66.17 | a | 50.40 | 41.08 | a | 26.84 | a | 22.52 | e | 39.40 | |||||
1994 | 2.12 | c | 7.98 | b | 28.02 | a | 39.10 | 51.43 | c | 62.57 | 64.59 | b | 62.45 | a | 59.36 | b | 48.16 | 34.40 | 23.94 | 40.34 | ||||||
1995 | 14.94 | 14.14 | 28.83 | a | 35.55 | a | 50.96 | c | 64.41 | a | 66.60 | a | 68.63 | a | 54.33 | c | 45.50 | a | 21.05 | 13.48 | b | 39.87 | ||||
1996 | 5.64 | c | 10.60 | 18.12 | a | 32.03 | a | 47.79 | 61.02 | a | 62.77 | a | 65.94 | 57.14 | a | 45.82 | 24.95 | 15.78 | a | 37.30 | ||||||
1997 | 8.52 | 16.66 | 24.37 | a | 37.86 | b | 45.11 | 64.82 | 64.98 | 61.32 | 57.41 | b | 46.15 | a | 27.43 | 25.11 | 39.98 | |||||||||
1998 | 17.66 | 30.73 | 25.95 | 42.88 | a | 56.45 | 60.10 | a | 67.11 | 67.14 | b | 60.84 | a | 47.27 | 34.65 | 22.42 | a | 44.43 | ||||||||
1999 | 9.69 | 23.46 | 27.06 | 41.47 | 55.00 | a | 62.38 | 69.40 | 64.00 | 57.05 | 42.67 | b | 37.85 | 21.40 | 42.62 | |||||||||||
2000 | 12.90 | b | 24.67 | c | 34.16 | 34.60 | t | 53.66 | 57.29 | a | 63.37 | a | 65.15 | a | 55.05 | 49.92 | 32.28 | a | 7.34 | 41.44 | a | |||||
2001 | 17.87 | 9.21 | 23.10 | 41.62 | a | 54.52 | 61.63 | 64.60 | a | 66.61 | 53.72 | 43.26 | 40.20 | 23.89 | 41.69 | |||||||||||
2002 | 17.52 | 21.20 | 15.88 | a | 36.03 | 45.84 | 60.35 | 67.32 | 62.66 | 56.83 | 36.74 | 27.53 | 19.52 | 38.95 | ||||||||||||
2003 | 7.77 | 7.12 | 21.60 | 34.57 | 49.19 | 57.98 | 64.11 | 66.18 | 56.77 | 43.47 | 27.87 | 20.48 | 38.09 | |||||||||||||
2004 | 4.84 | 16.43 | 27.65 | 36.53 | 47.34 | 56.47 | 61.73 | a | 57.37 | 60.72 | 46.06 | 33.23 | 16.70 | c | 38.76 | |||||||||||
2005 | 8.37 | 19.20 | 21.00 | 43.40 | 45.69 | m | ----- | z | ----- | z | 63.71 | 59.07 | 47.63 | e | 32.00 | 16.31 | 34.52 | c | ||||||||
2006 | 22.39 | 10.23 | 23.71 | 44.27 | 51.55 | 60.14 | a | 69.66 | 64.23 | 52.80 | 38.53 | a | 32.64 | b | 23.15 | 41.11 | ||||||||||
2007 | 14.58 | a | 3.68 | c | 29.50 | a | 36.73 | 54.84 | 64.07 | a | 66.10 | 64.50 | 56.31 | a | 46.03 | a | 28.00 | 13.37 | a | 39.81 | ||||||
2008 | 13.71 | b | 9.31 | b | 18.03 | 34.78 | 46.08 | 58.05 | a | 63.55 | 62.08 | 55.52 | 42.76 | 27.30 | b | 8.78 | b | 36.66 | ||||||||
2009 | 1.35 | a | 14.94 | b | 23.84 | 37.00 | b | 49.13 | a | 57.53 | a | 59.00 | 60.92 | 59.71 | a | 38.13 | 36.30 | 12.08 | a | 37.49 | ||||||
2010 | 12.08 | 11.81 | a | 32.48 | c | 43.47 | 53.36 | b | 58.73 | 66.98 | 65.97 | 51.75 | r | 46.60 | 34.03 | 17.05 | a | 40.23 | a | |||||||
2011 | 9.84 | 16.12 | 24.45 | 40.60 | 49.53 | a | 60.02 | 70.96 | c | 66.78 | a | 56.35 | 49.81 | b | 34.43 | a | 24.53 | a | 41.95 | |||||||
2012 | 19.35 | 24.70 | d | 42.09 | b | 39.88 | b | 56.10 | b | 64.81 | c | 70.94 | d | 64.40 | a | 55.89 | b | 43.03 | 32.62 | a | 22.85 | a | 44.72 | |||
2013 | 15.36 | b | 13.48 | 20.10 | 30.72 | c | 49.76 | b | 60.21 | f | 65.48 | a | 65.82 | a | 58.87 | 45.93 | b | 28.82 | b | 8.73 | c | 36.64 | a | |||
2014 | 3.68 | 6.92 | b | 16.43 | b | 34.95 | a | 51.68 | 61.57 | b | 65.43 | b | 63.95 | a | 57.25 | f | 44.10 | b | 22.92 | 20.97 | a | 35.69 | a | |||
2015 | 13.13 | 5.06 | a | 29.05 | a | 39.77 | b | 52.95 | b | 60.02 | c | 67.42 | 64.71 | b | 64.79 | f | 44.89 | c | 38.69 | a | 28.36 | b | 40.37 | a | ||
2016 | 14.63 | 19.67 | 32.83 | b | 38.71 | a | 52.45 | a | 61.36 | a | 67.85 | a | 67.60 | 60.48 | ----- | z | ----- | z | ----- | z | 46.18 | c | ||||
2017 | ----- | z | ----- | z | ----- | z | 41.29 | a | 47.33 | a | 62.00 | c | 65.13 | h | 60.08 | g | 59.13 | c | 45.41 | h | 27.52 | 12.11 | 41.56 | f | ||
2018 | 11.86 | b | 10.73 | 23.64 | f | 31.57 | j | 57.34 | b | 62.57 | i | 66.21 | e | 64.66 | c | 54.92 | l | 39.52 | e | 22.32 | 22.35 | 36.88 | d | |||
2019 | 9.93 | a | 6.89 | e | 23.36 | t | 30.56 | v | 46.38 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.07 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.09 | 15.67 | 26.56 | 40.03 | 52.09 | 61.31 | 66.42 | 64.98 | 56.74 | 46.01 | 31.58 | 18.18 | 40.82 | |||||||||||||
S.D. | 5.61 | 6.44 | 5.15 | 3.62 | 3.80 | 2.58 | 2.80 | 2.48 | 2.36 | 3.87 | 4.23 | 5.31 | 1.77 | |||||||||||||
SKEW | 0.03 | 0.45 | 0.26 | -0.19 | 0.29 | -0.29 | -0.06 | -0.17 | -0.45 | 0.16 | -0.51 | -0.38 | -0.28 | |||||||||||||
MAX | 24.02 | 30.83 | 42.09 | 47.77 | 62.47 | 65.88 | 73.25 | 71.53 | 60.84 | 57.52 | 40.20 | 28.36 | 44.72 | |||||||||||||
MIN | 1.35 | 3.68 | 15.88 | 30.72 | 45.11 | 54.41 | 59.00 | 57.37 | 50.40 | 36.74 | 21.05 | 5.74 | 36.66 | |||||||||||||
YRS | 65 | 65 | 62 | 62 | 64 | 60 | 61 | 63 | 61 | 63 | 62 | 63 | 45 |