YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | 54.33 | y | 48.67 | 58.71 | 53.26 | 48.43 | 35.87 | 22.40 | 14.19 | 40.22 | e | |||||||
1952 | 18.65 | 16.72 | 17.03 | 32.57 | 39.45 | 48.87 | 53.26 | 53.13 | 46.73 | 39.65 | 22.37 | 13.45 | 33.49 | |||||||||||||
1953 | 18.06 | 13.19 | a | 25.52 | 30.80 | 35.42 | 50.80 | 54.43 | a | 51.35 | 48.20 | 36.94 | 26.97 | 13.84 | 33.79 | |||||||||||
1954 | 18.45 | 22.75 | 23.65 | 38.30 | 42.53 | a | 49.87 | 54.71 | 52.71 | 47.17 | 37.52 | 27.57 | 14.55 | 35.81 | ||||||||||||
1955 | 10.94 | 7.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.82 | m | 37.32 | 21.33 | 18.90 | 19.13 | g | |||||
1956 | 22.35 | 13.66 | 22.45 | 28.07 | 38.45 | 51.43 | 51.65 | 49.06 | 45.21 | a | 33.58 | 13.86 | a | 11.77 | 31.80 | |||||||||||
1957 | 20.52 | 27.11 | 25.27 | a | 29.93 | a | 38.57 | a | 49.14 | a | 54.13 | 52.43 | a | 44.77 | 36.94 | 20.83 | 18.48 | 34.84 | ||||||||
1958 | 13.81 | 23.04 | 21.83 | a | 28.43 | 42.43 | a | 50.43 | 54.69 | b | 55.52 | 47.93 | b | 37.10 | a | 24.30 | 20.84 | 35.03 | ||||||||
1959 | 16.70 | a | 17.74 | a | 20.42 | 32.00 | 40.20 | a | 53.33 | 55.63 | a | 52.84 | 43.57 | b | 34.39 | 23.17 | 19.30 | a | 34.11 | |||||||
1960 | 11.29 | 12.68 | a | 26.39 | 31.90 | 39.13 | 50.40 | 54.27 | a | 54.04 | c | 49.52 | a | 34.41 | b | 25.66 | a | 15.42 | 33.76 | |||||||
1961 | 12.43 | a | 19.19 | a | 25.77 | 30.00 | 40.27 | a | 51.10 | 54.20 | a | 52.13 | a | 41.83 | 33.37 | d | 22.31 | a | 10.36 | c | 32.75 | |||||
1962 | 10.31 | b | 19.60 | c | 18.52 | d | 32.30 | c | 36.22 | d | 45.63 | 53.52 | 52.79 | c | 48.63 | 36.40 | a | 27.87 | 18.00 | 33.32 | ||||||
1963 | 7.42 | 20.37 | a | 23.30 | a | 29.33 | 41.10 | 44.83 | 56.03 | 52.10 | 46.93 | 38.13 | 22.80 | 11.52 | 32.82 | |||||||||||
1964 | 8.10 | a | 8.41 | 13.61 | c | 22.92 | d | 37.52 | d | 45.81 | c | 54.39 | 52.90 | 45.90 | 36.05 | j | 23.17 | 16.39 | 29.92 | a | ||||||
1965 | 18.35 | 16.71 | 21.65 | 29.46 | d | 35.50 | i | 44.32 | h | 53.07 | d | 49.50 | e | 39.68 | b | ----- | z | 25.80 | 20.75 | c | 30.55 | c | ||||
1966 | 10.31 | e | 11.56 | c | 23.65 | h | 32.10 | i | 39.58 | l | 47.20 | e | 55.14 | c | 51.32 | 44.64 | e | 34.54 | e | 26.31 | d | 13.55 | b | 32.73 | c | |
1967 | 11.00 | g | 17.27 | f | 29.29 | g | 30.09 | g | 40.48 | h | 47.52 | e | 55.03 | 50.43 | a | 43.93 | 34.03 | 22.28 | a | 8.65 | 37.41 | e | ||||
1968 | 8.40 | a | 20.36 | a | 24.94 | 27.71 | b | 37.93 | c | 48.73 | 53.58 | 50.74 | 45.60 | 34.48 | b | 23.37 | 13.20 | f | 34.17 | a | ||||||
1969 | 18.45 | 18.59 | f | 22.61 | h | 32.10 | 42.30 | a | 46.48 | e | 55.37 | d | ----- | z | ----- | z | 30.45 | t | 23.80 | 21.03 | 34.22 | e | ||||
1970 | 17.83 | b | 25.15 | a | 22.13 | a | 23.48 | e | 40.43 | c | 49.17 | 54.86 | c | 55.87 | a | 44.36 | b | 27.93 | d | 25.36 | b | 15.93 | a | 33.54 | ||
1971 | 12.53 | a | 16.04 | a | 22.23 | 34.48 | i | 35.13 | h | 48.55 | a | 54.94 | 51.61 | 42.93 | a | 33.20 | a | 22.33 | 14.29 | 31.87 | b | |||||
1972 | 14.58 | 19.52 | 27.33 | a | 28.30 | 37.90 | 49.36 | b | 56.52 | 52.65 | 47.04 | b | 39.71 | 22.39 | b | 13.41 | b | 34.06 | ||||||||
1973 | 11.57 | a | 18.71 | 23.72 | b | 26.23 | 34.63 | a | 43.57 | 53.29 | 52.68 | 42.00 | 34.87 | 26.50 | 14.87 | 31.89 | ||||||||||
1974 | 12.35 | 11.93 | 27.30 | a | 28.72 | a | 38.28 | b | 49.60 | 53.86 | c | 53.63 | a | 47.23 | 38.10 | b | 25.67 | 14.13 | a | 33.40 | ||||||
1975 | 13.74 | 18.32 | 26.65 | 31.87 | 40.26 | 52.47 | 55.81 | 53.06 | 48.63 | 36.71 | 23.47 | 17.23 | 34.85 | |||||||||||||
1976 | 13.61 | 25.90 | 25.10 | 34.70 | 43.61 | 51.60 | 58.03 | a | 54.16 | 48.47 | ----- | z | ----- | z | 12.93 | p | 39.46 | c | ||||||||
1977 | ----- | z | ----- | z | 25.73 | i | 36.31 | a | 44.65 | e | 55.36 | e | 56.62 | b | 57.71 | ----- | z | 40.67 | d | 31.40 | ----- | z | 46.10 | e | ||
1978 | ----- | z | ----- | z | 36.22 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | 19.25 | 26.76 | b | 35.70 | 45.00 | ----- | z | 57.50 | g | 52.74 | h | 50.07 | b | 40.14 | b | ----- | z | 20.83 | a | 33.96 | e | |||
1980 | 22.88 | g | ----- | z | 23.74 | h | 32.07 | 37.71 | g | 55.07 | c | 55.08 | f | 53.71 | 50.42 | k | 33.32 | c | 27.79 | f | 22.79 | c | 39.39 | g | ||
1981 | 20.13 | a | 21.95 | f | ----- | z | 42.50 | p | 41.10 | b | 55.10 | 57.20 | p | 51.41 | i | 45.57 | ----- | z | 28.11 | c | 19.74 | d | 34.96 | f | ||
1982 | 6.88 | e | 14.28 | j | 23.87 | h | 28.75 | v | 28.57 | h | 44.29 | p | 45.00 | u | 51.09 | h | ----- | z | 27.00 | r | 21.04 | d | 15.52 | d | 14.48 | i |
1983 | 14.96 | f | 16.43 | e | 22.12 | g | 28.43 | w | 39.86 | i | 46.15 | c | 55.31 | b | 56.26 | 49.41 | a | 36.18 | c | 23.48 | i | 18.04 | e | 39.68 | e | |
1984 | 12.21 | c | 16.12 | d | 24.35 | e | 27.78 | g | 46.35 | e | 48.64 | h | 53.91 | h | 53.96 | d | 47.96 | b | 32.17 | h | 23.09 | h | 22.00 | j | 33.49 | f |
1985 | 13.67 | g | 14.89 | j | 25.91 | h | 34.64 | b | 38.60 | a | 51.56 | c | 53.30 | d | 55.79 | g | 43.90 | 35.79 | b | 25.14 | b | 17.42 | 37.54 | d | ||
1986 | 21.24 | b | 24.22 | a | 29.58 | 35.77 | 41.94 | ----- | z | 55.97 | b | 56.10 | 46.03 | 34.41 | d | 26.60 | 19.84 | 35.61 | a | |||||||
1987 | 14.19 | 20.00 | 23.29 | 34.50 | 42.06 | 53.70 | 57.45 | 54.55 | 46.17 | 40.50 | a | 23.90 | a | 14.77 | 35.42 | |||||||||||
1988 | 10.87 | 19.90 | 24.93 | a | 33.48 | a | 42.57 | a | 52.90 | a | 56.23 | 55.35 | 44.93 | a | 40.27 | a | 25.48 | a | 14.06 | 35.08 | ||||||
1989 | 11.97 | 20.86 | 31.53 | a | 40.20 | 45.63 | a | 52.53 | 59.10 | a | 54.35 | 50.97 | 37.00 | 26.83 | 16.94 | 37.33 | ||||||||||
1990 | 12.90 | 19.00 | 29.65 | 37.30 | 42.70 | a | 55.87 | 55.97 | a | 53.45 | 51.21 | a | 36.61 | 25.17 | a | 9.06 | 35.74 | |||||||||
1991 | 11.00 | 22.18 | 25.50 | c | 31.17 | 39.87 | 49.37 | 55.32 | 55.38 | b | 48.10 | 39.23 | 24.10 | 17.13 | 34.86 | |||||||||||
1992 | 12.90 | 24.00 | a | 29.87 | ----- | z | 43.71 | q | 50.70 | c | 55.55 | 52.93 | a | 48.41 | c | 41.33 | a | 20.80 | 11.52 | 34.80 | b | |||||
1993 | 21.58 | 24.22 | a | 26.81 | 32.53 | 40.97 | 51.03 | 57.73 | a | 54.29 | 47.48 | a | 35.93 | b | 22.03 | 16.52 | 35.93 | |||||||||
1994 | 17.90 | 18.41 | a | 30.00 | c | 32.90 | 42.30 | a | 56.93 | b | 59.16 | 57.29 | 48.76 | a | 36.52 | 23.62 | a | 20.63 | a | 37.03 | ||||||
1995 | 15.87 | 27.93 | 27.77 | a | 32.10 | 38.39 | 49.04 | b | 55.31 | b | 57.67 | a | 49.69 | a | 38.11 | c | 28.37 | 22.29 | 36.88 | |||||||
1996 | 18.20 | a | 23.86 | a | 25.32 | c | 31.30 | c | 48.38 | b | 53.31 | a | 58.63 | a | 57.16 | f | 46.40 | 35.73 | a | 25.63 | 19.03 | a | 35.07 | a | ||
1997 | 16.00 | 20.73 | b | 29.81 | 31.67 | 42.53 | a | 52.53 | 55.71 | 54.90 | a | 51.60 | 34.39 | 25.43 | 15.00 | 35.86 | ||||||||||
1998 | 20.72 | b | 20.19 | a | 26.81 | 29.80 | 43.55 | b | 50.29 | b | 57.00 | 55.38 | g | 52.15 | c | 36.74 | 27.85 | c | 18.64 | c | 34.89 | a | ||||
1999 | 22.94 | 22.48 | a | 30.81 | 29.47 | 38.77 | 49.10 | 56.72 | b | 54.39 | 46.63 | 36.65 | 26.70 | 14.57 | a | 35.77 | ||||||||||
2000 | ----- | z | 24.75 | a | ----- | z | ----- | z | 46.22 | d | 55.00 | b | 57.30 | a | 54.11 | d | 50.20 | 37.41 | b | 19.93 | a | ----- | z | 43.12 | d | |
2001 | 15.66 | b | 21.96 | 28.84 | 36.77 | 46.61 | 54.59 | c | 58.52 | f | 54.24 | b | 49.76 | a | 41.07 | a | 28.26 | c | 16.19 | d | 35.81 | a | ||||
2002 | 17.10 | a | 17.04 | 24.20 | a | ----- | z | 44.48 | 58.07 | 57.74 | d | 56.14 | b | 49.04 | c | 35.79 | c | 25.20 | 17.29 | 36.55 | a | |||||
2003 | 24.82 | c | 22.89 | 27.03 | 33.40 | 43.16 | 53.43 | b | 61.71 | 57.48 | d | 48.20 | e | 44.15 | d | 25.38 | d | 17.11 | c | 38.23 | ||||||
2004 | 17.36 | c | ----- | z | 32.86 | b | 34.63 | ----- | z | 53.71 | b | 56.85 | e | 54.63 | a | 48.88 | e | 37.73 | a | ----- | z | 17.32 | 39.33 | c | ||
2005 | 23.56 | d | 25.07 | ----- | z | ----- | z | 44.07 | c | 50.21 | b | 58.13 | 55.18 | c | 50.56 | e | ----- | z | 26.97 | a | 18.33 | a | 39.12 | c | ||
2006 | 17.69 | b | 19.80 | c | 26.52 | b | 35.81 | d | 46.96 | e | 52.63 | c | 57.89 | c | 54.93 | a | 43.12 | d | 35.26 | 25.27 | 14.93 | b | 35.90 | |||
2007 | 11.24 | f | 19.74 | a | 30.13 | 34.77 | 40.17 | b | 51.87 | 56.54 | e | 56.50 | a | 49.62 | a | 35.96 | c | 28.34 | a | 14.42 | 38.01 | a | ||||
2008 | ----- | z | 19.04 | b | 25.48 | 28.37 | 37.50 | a | 51.03 | 53.93 | d | 50.00 | b | 47.10 | a | 35.93 | a | 27.00 | ----- | z | 37.54 | b | ||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | 45.97 | a | ----- | z | ----- | z | 56.55 | b | ----- | z | ----- | z | ----- | z | ----- | z | 51.26 | j |
2010 | ----- | z | ----- | z | 22.82 | i | ----- | z | 37.17 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | 14.46 | d | 27.44 | o | 31.53 | o | 35.82 | t | ----- | z | 57.14 | j | 56.75 | s | ----- | z | ----- | z | ----- | z | ----- | z | 14.46 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.41 | 19.39 | 25.51 | 31.90 | 41.43 | 50.89 | 55.81 | 53.84 | 47.14 | 36.69 | 24.64 | 16.29 | 34.76 | |||||||||||||
S.D. | 4.53 | 4.58 | 3.84 | 3.63 | 3.25 | 3.17 | 1.94 | 2.10 | 2.71 | 2.72 | 2.88 | 3.27 | 1.62 | |||||||||||||
SKEW | 0.10 | -0.56 | -0.71 | -0.19 | 0.09 | -0.04 | 0.52 | -0.17 | -0.49 | -0.04 | -0.83 | -0.19 | 0.10 | |||||||||||||
MAX | 24.82 | 27.93 | 32.86 | 40.20 | 48.38 | 58.07 | 61.71 | 57.71 | 52.15 | 44.15 | 31.40 | 22.79 | 38.23 | |||||||||||||
MIN | 6.88 | 7.18 | 13.61 | 22.92 | 34.63 | 43.57 | 51.65 | 49.06 | 39.68 | 27.93 | 13.86 | 8.65 | 31.80 | |||||||||||||
YRS | 47 | 49 | 44 | 44 | 47 | 51 | 50 | 50 | 52 | 49 | 51 | 51 | 28 |