YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | 11.33 | y | 22.25 | 33.50 | a | 43.05 | b | 47.85 | 57.18 | 63.50 | 61.69 | 58.02 | 42.72 | a | 38.58 | 22.79 | 44.65 | a | ||||||||
1950 | 25.89 | 29.36 | 34.15 | 41.72 | 46.40 | 58.75 | 63.32 | 60.84 | 52.12 | 51.19 | 37.32 | 31.95 | 44.42 | |||||||||||||
1951 | 25.50 | 29.41 | 33.94 | 39.95 | 49.73 | a | 56.90 | 66.53 | 62.31 | 55.00 | 43.98 | 32.52 | 24.42 | 43.35 | ||||||||||||
1952 | 26.15 | 25.33 | 27.37 | a | 41.85 | 50.00 | a | 59.62 | 63.97 | 63.11 | 56.72 | 48.21 | 28.83 | 23.34 | 42.87 | |||||||||||
1953 | 29.34 | 25.79 | 34.81 | b | 40.98 | a | 44.65 | 59.67 | 64.35 | 60.82 | a | 56.07 | 48.03 | a | 33.08 | 21.03 | 43.22 | |||||||||
1954 | 25.84 | 34.26 | a | 33.10 | 46.57 | 52.15 | 59.43 | 63.68 | 60.68 | 54.98 | a | 42.84 | 36.35 | 26.48 | 44.70 | |||||||||||
1955 | 19.92 | a | 20.57 | a | 32.82 | 39.53 | 52.45 | b | 59.35 | 61.45 | 62.65 | 57.63 | 46.94 | ----- | z | ----- | z | 45.33 | b | |||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | 52.38 | e | 61.43 | 62.31 | b | ----- | z | 56.32 | s | 47.23 | 32.43 | 25.87 | 46.94 | f | ||||
1957 | 29.00 | 36.39 | 35.16 | 39.63 | 46.66 | 57.78 | 63.98 | 61.47 | b | 54.67 | 46.06 | 31.24 | a | 31.68 | 44.48 | |||||||||||
1958 | 25.48 | 31.27 | 30.43 | a | 40.28 | 53.02 | 60.95 | 64.66 | 63.89 | 55.43 | 47.48 | 34.75 | 32.34 | 45.00 | ||||||||||||
1959 | 28.85 | 28.04 | 34.50 | 43.16 | a | 49.81 | 61.32 | 65.69 | 61.10 | 56.23 | 45.53 | 35.13 | 28.77 | 44.84 | ||||||||||||
1960 | 20.16 | 21.26 | 35.55 | 42.18 | 48.92 | 59.09 | h | 65.19 | 65.35 | 60.62 | 44.80 | i | 35.35 | 24.30 | a | 41.89 | b | |||||||||
1961 | 27.45 | 29.61 | 33.77 | a | 41.83 | 50.62 | g | 61.25 | 65.27 | 63.47 | a | 54.32 | 45.87 | 32.74 | a | 24.15 | a | 43.61 | a | |||||||
1962 | 23.52 | a | 30.57 | 27.42 | 44.97 | 48.84 | 58.27 | 63.19 | 62.40 | 56.92 | 48.34 | 39.02 | 27.38 | j | 45.77 | a | ||||||||||
1963 | 21.70 | a | 30.61 | a | 34.00 | 40.45 | a | 52.75 | g | 57.98 | 65.48 | 61.27 | 58.17 | 49.76 | 37.02 | 29.03 | 44.13 | a | ||||||||
1964 | 20.83 | h | 19.65 | b | 26.92 | 37.15 | 50.15 | 56.79 | b | 64.08 | 60.63 | 54.47 | 48.06 | 33.36 | a | 25.35 | 43.33 | a | ||||||||
1965 | 27.94 | 25.02 | a | 29.13 | a | 38.18 | 46.02 | 52.15 | 61.84 | 60.35 | 52.58 | 47.74 | 38.93 | 26.85 | a | 42.23 | ||||||||||
1966 | 21.13 | 22.15 | a | 35.16 | 42.65 | 52.00 | 58.45 | 65.76 | 63.50 | 55.75 | j | 45.32 | 40.02 | 29.17 | a | 43.21 | a | |||||||||
1967 | 24.34 | 30.84 | 39.31 | b | 40.50 | 47.82 | 55.45 | 64.74 | 60.94 | 54.60 | f | 45.95 | 39.64 | i | 21.68 | 43.16 | b | |||||||||
1968 | 23.23 | a | 31.89 | j | 32.15 | 37.53 | 47.48 | 59.37 | 61.71 | e | 56.98 | c | 53.77 | 46.97 | 33.18 | 22.94 | f | 45.24 | b | |||||||
1969 | 29.85 | a | 24.37 | a | 26.11 | 42.65 | 48.06 | e | 58.02 | f | 64.91 | c | 63.25 | e | 54.02 | f | 40.65 | h | 31.57 | c | 26.93 | j | 41.35 | d | ||
1970 | 21.83 | d | 33.07 | f | 28.97 | b | 33.43 | i | 48.02 | g | 57.05 | a | 64.35 | a | 62.74 | 54.17 | a | 39.77 | a | 35.58 | e | 26.81 | e | 43.47 | c | |
1971 | 23.93 | b | 26.77 | 33.59 | c | 39.35 | 46.27 | a | 56.95 | a | 64.85 | 61.10 | 52.98 | c | 41.27 | ----- | z | 23.75 | e | 42.80 | a | |||||
1972 | 25.47 | a | 29.52 | d | 41.45 | c | 41.47 | a | 48.15 | a | 56.73 | f | 64.66 | b | 61.22 | a | 53.86 | b | 45.45 | 26.73 | f | 21.16 | f | 45.69 | c | |
1973 | 20.91 | c | 24.59 | a | 29.63 | 33.60 | 47.55 | a | 57.45 | 62.58 | a | 61.88 | b | 54.56 | c | 45.40 | a | 33.67 | f | 25.84 | 42.18 | a | ||||
1974 | 21.00 | d | 22.52 | c | 37.13 | d | 38.48 | c | 51.24 | b | 62.10 | e | 62.40 | a | 59.72 | f | 54.58 | 46.88 | e | 33.91 | b | 22.31 | e | 41.14 | a | |
1975 | 22.14 | b | 22.81 | a | 30.50 | d | 35.26 | c | 45.18 | c | 55.68 | 62.04 | c | 60.48 | a | 54.47 | 44.37 | e | 32.07 | a | 25.00 | e | 40.83 | |||
1976 | 21.64 | c | 31.48 | c | 30.64 | b | 40.66 | b | 48.72 | a | 57.58 | 62.33 | b | 59.98 | 54.57 | a | 41.67 | e | 32.54 | d | 25.47 | b | 42.27 | |||
1977 | 20.31 | b | 26.20 | 28.64 | b | 41.62 | a | 46.43 | b | 59.87 | 62.97 | b | 63.03 | a | 56.91 | b | 46.59 | d | 34.56 | e | 30.83 | b | 43.16 | |||
1978 | 25.47 | a | 24.56 | a | 34.65 | 41.11 | b | 46.70 | a | 58.90 | a | 64.44 | e | 60.38 | c | 55.17 | 47.76 | 34.78 | a | 21.17 | b | 42.92 | ||||
1979 | 18.22 | a | 24.20 | a | 29.92 | a | 39.38 | 47.45 | a | 56.75 | 63.10 | b | 59.82 | 57.88 | b | 48.43 | b | 27.79 | b | 28.93 | d | 41.82 | ||||
1980 | 27.40 | b | 28.05 | a | 30.00 | a | 38.17 | 45.75 | a | 59.48 | 65.14 | b | 62.16 | 55.65 | 43.55 | b | 35.21 | b | 33.48 | c | 43.67 | |||||
1981 | 31.03 | a | 29.81 | b | 31.02 | c | 43.16 | b | 48.97 | 60.52 | c | 63.02 | c | 61.00 | a | 55.05 | 44.23 | c | 37.86 | a | 29.58 | a | 44.60 | |||
1982 | 22.58 | 25.48 | a | 31.84 | c | 39.87 | 46.97 | 55.32 | b | 61.88 | a | 61.83 | a | 56.23 | d | 41.56 | 32.03 | 23.50 | b | 41.59 | ||||||
1983 | 25.06 | d | 26.00 | b | 31.18 | a | 34.02 | b | 46.02 | 55.62 | 63.02 | 61.74 | 58.09 | a | 46.55 | b | 33.28 | a | 26.98 | b | 42.30 | |||||
1984 | 24.61 | 25.00 | 32.17 | b | 37.37 | 53.50 | 57.73 | 63.60 | 60.57 | b | 56.15 | 40.14 | c | 33.69 | a | 25.43 | b | 42.50 | ||||||||
1985 | 20.53 | a | 21.19 | a | 32.92 | 41.70 | 49.10 | a | 59.27 | 63.68 | a | 61.81 | b | 50.60 | 42.08 | 28.70 | b | 26.95 | c | 41.54 | ||||||
1986 | 32.21 | b | 29.43 | 35.80 | c | 38.03 | a | 46.07 | c | 57.10 | e | 60.61 | ----- | z | 52.33 | a | 43.48 | e | 34.23 | b | 26.82 | 41.47 | a | |||
1987 | 21.88 | e | 24.39 | a | 27.68 | c | 41.66 | b | 47.28 | a | 57.67 | c | 60.63 | a | 58.43 | a | 53.47 | 47.80 | a | 33.09 | a | 23.61 | 41.47 | |||
1988 | 21.08 | a | 27.39 | a | 30.87 | a | 38.92 | 47.02 | 58.13 | 62.32 | 61.55 | 52.47 | a | 49.37 | 31.31 | c | 22.58 | 41.92 | ||||||||
1989 | 21.52 | a | 28.04 | 36.84 | 44.20 | 50.65 | 57.67 | 65.15 | 60.58 | 55.20 | 43.60 | a | 33.02 | 24.44 | 43.41 | |||||||||||
1990 | 21.42 | a | 24.27 | 34.11 | 41.80 | 46.66 | 61.78 | 61.50 | a | 58.37 | a | 56.38 | b | 44.08 | a | 34.75 | b | 22.48 | e | 42.30 | ||||||
1991 | 20.59 | b | 31.55 | 29.71 | b | 39.28 | a | 48.02 | a | 55.10 | 62.29 | b | 61.35 | d | 54.88 | e | 47.76 | d | 30.35 | c | 23.75 | a | 42.05 | |||
1992 | 19.95 | 28.05 | 35.12 | a | 44.95 | a | 49.79 | 55.17 | c | 61.41 | b | 60.57 | c | 55.83 | a | 47.87 | d | 27.07 | a | 20.52 | c | 42.19 | ||||
1993 | 26.65 | 27.54 | 33.30 | a | 41.26 | c | 49.45 | a | 56.75 | 62.73 | a | 61.16 | 53.85 | 44.20 | a | 30.55 | a | 25.87 | a | 42.78 | ||||||
1994 | 26.24 | 25.21 | 36.02 | 39.45 | 48.90 | b | 62.17 | 64.52 | a | 64.22 | b | 55.40 | a | 41.75 | c | 28.12 | d | 28.09 | b | 43.34 | ||||||
1995 | 24.32 | 33.43 | 35.40 | 37.07 | a | 45.34 | 54.64 | a | 61.30 | c | 64.12 | c | 56.18 | 45.18 | a | 37.41 | a | 27.07 | a | 43.46 | ||||||
1996 | 25.10 | b | 33.30 | a | 32.26 | b | 42.36 | b | 53.58 | 61.55 | a | 65.22 | d | 62.90 | 53.17 | d | 43.77 | 34.23 | 28.07 | a | 44.63 | |||||
1997 | 23.47 | a | 26.25 | 35.42 | 37.80 | 51.19 | 56.09 | a | 61.93 | c | 60.87 | 58.40 | a | 44.05 | b | 33.50 | c | 22.28 | b | 42.60 | ||||||
1998 | 25.77 | a | 22.87 | b | 30.34 | 36.20 | 47.56 | 54.88 | 64.05 | b | 62.52 | a | 59.18 | b | 45.21 | b | 34.93 | b | 27.38 | a | 42.57 | |||||
1999 | 28.13 | 31.13 | b | 39.03 | 38.52 | b | 47.58 | e | 56.66 | a | 62.28 | f | 60.98 | c | 54.60 | 47.71 | 39.70 | b | 22.34 | 42.40 | a | |||||
2000 | 28.53 | b | 31.69 | 35.48 | b | 44.06 | c | 54.84 | c | 60.88 | d | 62.72 | d | 64.48 | d | 58.53 | 44.95 | c | 24.53 | a | 26.37 | a | 44.76 | |||
2001 | 20.98 | a | 24.87 | b | 34.55 | c | 40.92 | f | 51.96 | c | 59.27 | b | 64.82 | c | 61.71 | e | 58.41 | b | 47.48 | f | 33.90 | f | 22.21 | c | 44.31 | c |
2002 | 20.41 | b | ----- | z | 31.37 | e | 45.26 | c | 49.62 | a | 64.68 | k | 65.35 | d | 62.56 | e | 55.50 | a | 45.21 | c | 34.07 | i | 21.41 | d | 44.08 | c |
2003 | 28.27 | e | 23.83 | e | 28.91 | b | 36.75 | f | 49.27 | i | 59.46 | d | 68.41 | d | 63.66 | c | 56.91 | a | 50.90 | 32.78 | a | 24.43 | d | 43.76 | b | |
2004 | 22.45 | c | 21.29 | a | 38.30 | a | 39.52 | d | 50.88 | b | 58.56 | c | 62.54 | e | 60.91 | o | 55.17 | d | 43.88 | c | 30.17 | d | 26.38 | f | 42.27 | b |
2005 | 28.56 | d | 26.50 | c | 28.77 | e | 40.83 | g | 39.32 | t | 53.10 | d | 66.16 | c | 61.44 | e | 57.22 | c | 46.73 | 37.63 | c | 24.57 | b | 43.07 | b | |
2006 | 24.98 | a | 27.46 | d | 29.88 | e | 42.88 | b | 52.74 | b | 62.54 | c | 63.92 | e | 59.98 | c | 52.86 | b | 44.05 | c | 35.85 | d | 21.54 | f | 45.19 | a |
2007 | 20.39 | c | 24.96 | c | 34.54 | e | 40.11 | c | 49.52 | b | 61.48 | a | 66.35 | d | 63.95 | 58.60 | 47.98 | b | 41.83 | 24.95 | 44.56 | |||||
2008 | 22.40 | 27.91 | a | 35.03 | 42.02 | 48.21 | 59.72 | 65.38 | b | 65.42 | 56.87 | 47.55 | 38.36 | a | 28.38 | c | 44.77 | |||||||||
2009 | 29.39 | 32.23 | 38.88 | a | 40.80 | 53.23 | 56.52 | b | 66.82 | 64.35 | a | 56.26 | c | 43.93 | d | 38.93 | 23.81 | 45.43 | ||||||||
2010 | 26.70 | a | 26.52 | 32.59 | b | 42.02 | 49.05 | 61.37 | 66.90 | 63.42 | 60.75 | 48.97 | a | 33.88 | 34.54 | c | 45.56 | |||||||||
2011 | 26.38 | a | 27.21 | 39.98 | 44.07 | 48.47 | a | 61.83 | 67.71 | 66.03 | 58.43 | 47.13 | a | 36.30 | b | 27.55 | a | 45.93 | ||||||||
2012 | 32.38 | b | 30.50 | a | 36.82 | a | 46.67 | a | 54.81 | 65.88 | 65.94 | ----- | z | 58.36 | a | 48.80 | a | ----- | z | ----- | z | 48.91 | c | |||
2013 | 22.32 | ----- | z | ----- | z | 43.60 | 51.26 | 64.03 | 66.00 | 63.35 | 57.45 | 43.42 | a | 37.75 | 29.06 | 47.83 | b | |||||||||
2014 | 32.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.18 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.64 | 27.05 | 33.02 | 40.71 | 49.10 | 58.56 | 63.94 | 61.91 | 55.76 | 45.70 | 34.10 | 25.93 | 43.32 | |||||||||||||
S.D. | 3.53 | 3.73 | 3.45 | 2.80 | 2.55 | 2.65 | 1.76 | 1.74 | 2.13 | 2.57 | 3.51 | 3.28 | 1.32 | |||||||||||||
SKEW | 0.38 | 0.20 | 0.16 | -0.24 | 0.45 | 0.14 | 0.20 | -0.02 | 0.10 | -0.18 | -0.26 | 0.59 | 0.20 | |||||||||||||
MAX | 32.38 | 36.39 | 41.45 | 46.67 | 54.84 | 65.88 | 68.41 | 66.03 | 60.75 | 51.19 | 41.83 | 34.54 | 45.93 | |||||||||||||
MIN | 18.22 | 19.65 | 26.11 | 33.60 | 44.65 | 52.15 | 60.61 | 56.98 | 50.60 | 39.77 | 24.53 | 20.52 | 40.83 | |||||||||||||
YRS | 63 | 60 | 63 | 60 | 60 | 61 | 64 | 60 | 61 | 62 | 57 | 57 | 38 |