YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.33 | s | 23.43 | 19.19 | 21.31 | j | ||
1952 | 16.03 | b | 23.28 | 25.97 | 30.10 | 37.68 | 41.37 | 51.06 | 46.65 | 39.90 | 31.58 | 13.25 | b | 20.84 | 31.48 | |||||||||||
1953 | 29.32 | 21.79 | 23.94 | 28.43 | 33.97 | 38.57 | 47.19 | 46.13 | 42.43 | 30.87 | 30.13 | 21.68 | 32.87 | |||||||||||||
1954 | 22.90 | a | 25.93 | 22.61 | 29.03 | 36.61 | 39.80 | 51.23 | 44.03 | 33.13 | 26.55 | 26.50 | 14.23 | a | 31.05 | |||||||||||
1955 | 14.58 | 16.75 | 23.81 | 28.20 | 33.74 | 43.30 | 48.32 | 48.55 | 38.87 | 27.06 | 21.57 | 23.58 | 30.69 | |||||||||||||
1956 | 23.81 | 17.93 | 26.74 | 29.50 | 40.16 | 41.10 | 49.16 | 43.71 | 37.77 | 31.87 | 18.03 | 16.68 | 31.37 | |||||||||||||
1957 | 8.97 | 25.00 | 27.39 | 28.80 | 38.06 | 44.17 | 47.03 | 41.90 | a | 38.93 | 32.74 | 21.67 | 24.58 | 31.60 | ||||||||||||
1958 | 21.70 | a | 29.86 | 23.19 | 29.00 | 37.35 | 42.53 | 48.39 | 48.74 | 34.77 | 28.19 | 22.55 | a | 25.55 | 32.65 | |||||||||||
1959 | 22.45 | 20.43 | 22.71 | 28.37 | 32.84 | 45.43 | 52.45 | 46.68 | 41.73 | 33.94 | 19.33 | 12.10 | 31.54 | |||||||||||||
1960 | 16.77 | 21.46 | a | 28.33 | a | 30.96 | d | 36.06 | 44.43 | 55.23 | 46.87 | a | 40.93 | 30.71 | 25.93 | 19.23 | 33.08 | |||||||||
1961 | 19.03 | 29.07 | 26.71 | 29.14 | a | 35.87 | 48.90 | 52.13 | 53.90 | 36.73 | 30.32 | ----- | z | ----- | z | 36.18 | b | |||||||||
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.33 | 22.48 | 23.91 | j | ||
1963 | 11.48 | 30.75 | 25.10 | 28.30 | 41.81 | 41.00 | 47.45 | 47.00 | 43.93 | 36.73 | a | 23.62 | v | 18.45 | 33.82 | a | ||||||||||
1964 | 19.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.68 | k | |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | 28.95 | i | 39.58 | 43.37 | 49.39 | 51.77 | 45.77 | 29.13 | 29.40 | 21.58 | 38.75 | d | ||||||||
1967 | 16.48 | 22.89 | 21.55 | 21.07 | 36.71 | c | 45.17 | 50.55 | 67.03 | 41.73 | 31.23 | 24.20 | e | 17.74 | 33.03 | |||||||||||
1968 | 18.61 | 25.69 | 27.55 | 23.93 | 34.48 | ----- | z | 59.90 | ----- | z | ----- | z | ----- | z | 28.68 | b | 21.61 | 30.06 | d | |||||||
1969 | ----- | z | ----- | z | ----- | z | 32.10 | 42.19 | 48.07 | 53.84 | 50.29 | 44.70 | 30.58 | 23.97 | 25.87 | 39.07 | c | |||||||||
1970 | 25.68 | 27.00 | 25.81 | 27.03 | a | 39.00 | 48.33 | 52.23 | 52.29 | 37.70 | 30.13 | 30.93 | 24.87 | a | 35.08 | |||||||||||
1971 | 26.42 | 23.64 | 25.13 | a | 31.10 | 39.23 | 46.00 | 53.94 | 56.48 | 39.57 | 31.61 | 27.83 | 18.61 | 34.96 | ||||||||||||
1972 | 17.94 | 26.86 | 33.58 | 33.07 | a | 41.61 | 49.80 | 54.29 | 53.26 | 42.10 | 35.94 | 28.33 | 15.13 | a | 35.99 | |||||||||||
1973 | 20.40 | a | 26.71 | 29.32 | 29.97 | ----- | z | 46.52 | e | 52.23 | 50.84 | 40.41 | a | ----- | z | 35.39 | l | 26.19 | d | 35.84 | c | |||||
1974 | 17.65 | 22.82 | 26.40 | a | 29.00 | 36.65 | 47.73 | 52.00 | i | 47.65 | 38.83 | 29.61 | 23.63 | 18.96 | f | 32.00 | b | |||||||||
1975 | 20.50 | g | 20.86 | 25.16 | 25.63 | 34.23 | 42.97 | 51.97 | 47.16 | 39.20 | 32.23 | e | 22.85 | d | 22.45 | 33.15 | a | |||||||||
1976 | 20.43 | a | 30.05 | i | 21.17 | a | 28.68 | e | 37.52 | 43.93 | a | 53.42 | 45.58 | 41.93 | 28.71 | 21.50 | 10.96 | g | 34.29 | b | ||||||
1977 | 10.95 | k | 23.64 | 24.84 | 31.47 | 37.84 | 49.87 | ----- | z | 50.00 | p | 42.10 | 31.32 | 26.57 | 27.55 | 32.80 | c | |||||||||
1978 | 27.23 | 28.11 | 29.79 | l | 32.63 | 36.45 | 43.41 | a | 49.63 | a | 47.23 | 38.55 | a | 30.84 | 20.67 | 13.92 | g | 35.47 | b | |||||||
1979 | 10.06 | 25.21 | 25.48 | d | 30.00 | 36.32 | 42.10 | 52.97 | 52.65 | 45.83 | f | 40.83 | b | 20.67 | 21.67 | d | 32.54 | a | ||||||||
1980 | 22.45 | 30.28 | 25.39 | 33.33 | 40.19 | 42.10 | 51.58 | 46.35 | 44.44 | e | 32.81 | 28.03 | 20.48 | 34.79 | ||||||||||||
1981 | 23.16 | 24.61 | 26.42 | 33.28 | a | 37.81 | 46.60 | 49.54 | c | 50.32 | 42.20 | 32.13 | a | 29.90 | 27.81 | 35.31 | ||||||||||
1982 | 20.38 | b | 22.89 | 27.23 | 25.83 | a | 32.61 | 44.13 | 50.52 | 51.42 | 41.37 | 32.39 | 21.63 | 21.67 | a | 32.67 | ||||||||||
1983 | 24.00 | 29.11 | 31.16 | 27.48 | a | 36.40 | a | 42.03 | 48.61 | 53.97 | 41.67 | 34.74 | 31.47 | 21.83 | b | 35.21 | ||||||||||
1984 | 10.06 | 23.26 | b | 29.71 | 29.00 | a | 40.61 | 42.73 | 52.13 | 52.71 | 38.63 | 32.65 | 28.35 | j | 15.54 | c | 33.37 | a | ||||||||
1985 | 15.90 | 20.11 | a | 23.30 | a | 33.10 | 37.65 | 47.43 | 56.58 | 47.77 | 37.37 | 30.26 | 20.17 | a | 14.42 | 32.01 | ||||||||||
1986 | 26.00 | 31.07 | 31.81 | 32.50 | 37.03 | 51.47 | 49.39 | 53.61 | 40.40 | 32.77 | 28.90 | a | 19.65 | 36.22 | ||||||||||||
1987 | 18.77 | 24.56 | a | 29.70 | a | 35.23 | ----- | z | 46.48 | a | 46.93 | a | 45.77 | 38.50 | p | 32.97 | 23.69 | d | 21.54 | c | 32.56 | b | ||||
1988 | 18.57 | c | 21.83 | 25.03 | 34.66 | a | 37.24 | b | 50.31 | a | 54.52 | 47.94 | 40.20 | 36.81 | 29.43 | 17.87 | 34.53 | |||||||||
1989 | 15.61 | 13.46 | 31.77 | 34.23 | 36.84 | 45.60 | 54.06 | 48.03 | 38.80 | 32.90 | 24.60 | 17.45 | 32.78 | |||||||||||||
1990 | 22.63 | a | 20.37 | a | 27.73 | a | 39.32 | b | 37.90 | 45.77 | 53.77 | 53.71 | 45.70 | 33.24 | b | 24.33 | 9.73 | a | 34.52 | |||||||
1991 | 18.03 | 27.21 | 28.71 | 32.67 | 36.39 | 42.70 | 53.81 | 53.97 | 44.40 | 38.39 | 31.60 | 19.84 | 35.64 | |||||||||||||
1992 | 24.42 | 27.76 | 29.58 | 36.57 | 42.68 | 49.40 | 51.68 | 54.55 | 43.33 | 37.84 | 25.57 | 20.35 | 36.98 | |||||||||||||
1993 | 13.24 | b | 19.23 | b | 35.03 | a | 35.17 | 43.59 | b | 43.07 | 45.40 | a | 48.43 | a | 41.43 | 37.39 | 18.43 | 23.13 | a | 33.63 | ||||||
1994 | 24.97 | 22.86 | 30.55 | 34.77 | 41.19 | 47.89 | b | 56.93 | a | 53.45 | 43.74 | c | 33.35 | 23.20 | 19.06 | 36.00 | ||||||||||
1995 | 27.60 | a | 28.50 | 29.29 | 31.41 | c | 38.77 | 44.47 | 52.64 | c | 47.87 | 43.77 | 32.61 | 32.10 | a | 27.16 | 36.35 | |||||||||
1996 | 26.84 | 25.14 | 28.97 | 34.45 | a | 39.74 | 46.30 | 55.13 | a | 51.26 | 41.37 | 34.60 | a | 30.27 | 28.33 | a | 36.87 | |||||||||
1997 | 23.71 | 22.35 | b | 30.13 | 31.59 | a | 41.55 | b | 47.67 | 50.63 | a | ----- | z | ----- | z | 34.42 | 27.97 | 17.74 | 32.78 | b | ||||||
1998 | 30.65 | 28.25 | 28.97 | 31.37 | 39.97 | 44.80 | 55.90 | 51.93 | d | 48.17 | a | 32.10 | a | 30.80 | 19.90 | a | 36.90 | |||||||||
1999 | 23.68 | 26.43 | 27.13 | 29.43 | 37.32 | 45.67 | 50.58 | 51.59 | b | 39.37 | 32.10 | b | 30.57 | 18.65 | 34.38 | |||||||||||
2000 | 25.10 | a | 30.00 | 26.27 | e | 35.10 | 40.84 | 47.10 | a | 52.61 | 52.87 | 40.30 | 33.19 | 22.60 | 22.73 | a | 35.73 | |||||||||
2001 | 17.67 | a | 21.33 | a | 30.56 | d | 29.25 | f | 45.12 | w | 46.10 | a | 51.52 | 53.80 | a | 43.19 | c | 36.97 | b | 26.43 | 25.58 | 35.31 | b | |||
2002 | 24.81 | 22.50 | 25.21 | b | 31.48 | a | 36.80 | a | 48.10 | a | 56.45 | 47.97 | a | 41.60 | 28.07 | c | 24.27 | 24.55 | b | 34.32 | ||||||
2003 | 29.45 | 20.73 | b | 32.13 | a | 31.17 | a | 39.10 | 47.59 | c | 57.84 | 53.80 | a | 44.93 | 37.97 | a | 24.43 | 28.00 | a | 37.26 | ||||||
2004 | 23.77 | 26.32 | a | 32.10 | 32.90 | a | 39.87 | a | 48.36 | b | 54.90 | 52.67 | a | 42.23 | 36.00 | a | 26.43 | b | 20.21 | l | 37.78 | a | ||||
2005 | 17.90 | 22.96 | b | 28.84 | 33.24 | a | 42.42 | 43.83 | 55.35 | 52.00 | 40.07 | 34.20 | a | 25.63 | 23.68 | 35.01 | ||||||||||
2006 | 27.65 | 20.29 | 27.52 | b | 34.11 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.39 | h | ||
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | 30.71 | w | 44.31 | r | 45.31 | d | 55.27 | e | 52.26 | h | 40.34 | a | 33.80 | a | 31.55 | a | 20.10 | 37.73 | f | |
2009 | 23.55 | b | 24.32 | 26.19 | d | 30.13 | 42.87 | 48.11 | b | 53.42 | 51.71 | 46.73 | 30.26 | 26.23 | 15.16 | 34.89 | ||||||||||
2010 | 28.87 | 27.25 | 25.83 | a | 28.86 | a | 35.16 | 44.50 | 51.53 | a | 50.80 | a | 41.70 | g | 40.00 | a | 27.00 | b | 27.55 | 35.21 | a | |||||
2011 | 21.90 | 24.54 | 30.76 | b | 31.07 | 35.83 | b | 43.57 | 51.23 | 53.55 | 44.97 | a | 41.60 | p | 25.07 | c | 15.77 | 34.39 | a | |||||||
2012 | 20.94 | 20.61 | a | 31.84 | 33.97 | 38.39 | 44.66 | a | 55.71 | 52.35 | 43.59 | a | 33.94 | 30.48 | c | 24.90 | 35.95 | |||||||||
2013 | 10.00 | 24.39 | 28.00 | 30.00 | b | 39.39 | 45.67 | 57.21 | c | 53.32 | 47.57 | b | 28.71 | 26.47 | 14.64 | i | 35.52 | a | ||||||||
2014 | 18.23 | 26.78 | a | 27.52 | b | 30.83 | 36.84 | 45.75 | b | 56.47 | l | 52.58 | 46.37 | 38.42 | 28.13 | 29.94 | 34.67 | a | ||||||||
2015 | 22.63 | a | 26.85 | a | 31.52 | 26.93 | b | 38.39 | h | 53.40 | 55.23 | 54.13 | 44.27 | 40.36 | c | 23.97 | 24.61 | 36.72 | a | |||||||
2016 | 21.52 | 24.97 | 31.77 | 34.37 | 38.06 | 45.59 | a | 47.24 | f | 46.45 | k | 40.77 | 39.26 | 30.50 | 16.30 | a | 32.31 | b | ||||||||
2017 | 17.42 | 29.39 | 34.29 | 34.63 | 38.00 | e | 43.40 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.75 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.86 | 24.45 | 27.77 | 31.01 | 38.13 | 45.46 | 52.37 | 50.59 | 41.55 | 33.16 | 25.67 | 21.12 | 34.26 | |||||||||||||
S.D. | 5.24 | 3.69 | 3.22 | 3.23 | 2.59 | 2.91 | 3.10 | 4.00 | 3.08 | 3.42 | 4.02 | 4.43 | 1.91 | |||||||||||||
SKEW | -0.38 | -0.37 | 0.12 | -0.32 | 0.08 | 0.18 | -0.03 | 0.89 | -0.15 | 0.41 | -0.50 | -0.19 | -0.28 | |||||||||||||
MAX | 30.65 | 31.07 | 35.03 | 39.32 | 43.59 | 53.40 | 59.90 | 67.03 | 48.17 | 40.83 | 32.10 | 29.94 | 37.26 | |||||||||||||
MIN | 8.97 | 13.46 | 21.17 | 21.07 | 32.61 | 38.57 | 45.40 | 41.90 | 33.13 | 26.55 | 13.25 | 9.73 | 30.69 | |||||||||||||
YRS | 58 | 58 | 58 | 59 | 56 | 59 | 56 | 55 | 55 | 57 | 58 | 56 | 36 |