YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | 23.10 | s | 28.41 | b | 32.97 | 39.13 | 43.70 | 48.26 | 47.42 | 44.47 | 37.16 | 19.50 | 25.58 | 36.66 | b | |||||||||
1953 | 34.14 | b | 26.96 | 27.90 | 30.57 | 37.00 | 40.40 | 45.90 | 48.00 | 43.63 | 35.00 | 33.10 | 28.97 | 35.96 | ||||||||||||
1954 | 25.65 | 28.32 | 22.90 | b | 31.07 | 37.06 | 41.63 | 44.87 | a | 44.61 | 40.33 | 30.58 | 30.63 | 18.43 | a | 33.01 | ||||||||||
1955 | 18.97 | 21.29 | 22.23 | 28.60 | 35.19 | 43.07 | 45.87 | 44.13 | 41.80 | 34.52 | 25.20 | 24.94 | 32.15 | |||||||||||||
1956 | 25.61 | 22.76 | 29.45 | 32.93 | 41.77 | 43.00 | 48.61 | 46.55 | 42.50 | 34.35 | 25.20 | 24.61 | 34.78 | |||||||||||||
1957 | 7.39 | 25.79 | 31.16 | 34.23 | 41.23 | 45.13 | 44.61 | 43.84 | 41.69 | a | 35.16 | 23.37 | 27.87 | 33.46 | ||||||||||||
1958 | 27.03 | 34.25 | 27.35 | 33.00 | 40.00 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.41 | h | ||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.33 | 48.32 | 48.61 | 42.20 | 33.55 | 32.39 | b | 28.71 | 40.02 | e | ||||||
1975 | 28.59 | b | 24.46 | 27.77 | 26.83 | a | 35.10 | 41.43 | 50.74 | 46.17 | b | 40.90 | 36.13 | 28.17 | 28.06 | 34.53 | ||||||||||
1976 | 24.67 | a | 23.18 | a | 25.45 | 30.30 | 36.97 | a | 39.87 | 49.30 | a | 49.65 | 43.87 | 31.93 | a | 32.23 | 20.48 | 33.99 | ||||||||
1977 | 17.35 | 25.61 | 26.06 | 32.47 | 35.58 | 47.17 | 48.48 | 53.58 | 41.40 | 34.42 | 25.90 | 28.81 | 34.74 | |||||||||||||
1978 | 26.68 | 30.18 | 30.84 | 33.40 | 35.94 | 45.37 | 49.58 | 48.55 | 41.30 | 32.35 | 18.53 | 19.26 | 34.33 | |||||||||||||
1979 | 6.63 | a | 26.79 | 29.74 | 33.83 | 39.26 | 45.10 | 49.84 | 49.13 | 44.90 | 39.26 | 28.20 | 28.74 | 35.12 | ||||||||||||
1980 | 18.84 | 28.89 | a | 28.57 | a | 34.43 | 39.16 | 43.20 | 49.48 | 44.77 | 42.97 | 34.94 | 30.87 | 28.68 | 35.40 | |||||||||||
1981 | 28.17 | a | 24.85 | b | 29.47 | a | 33.27 | 38.55 | 44.17 | 47.29 | 50.84 | 43.76 | a | 34.23 | 30.73 | 27.26 | 36.05 | |||||||||
1982 | 22.26 | d | 27.00 | b | 27.45 | b | 28.97 | 36.37 | a | 47.39 | b | 49.90 | 49.06 | 42.19 | c | 33.85 | e | 26.04 | e | 26.04 | e | 34.71 | ||||
1983 | 29.70 | a | 32.00 | f | 33.81 | e | 32.11 | c | 39.74 | 42.75 | b | 46.77 | a | 50.84 | 39.65 | d | 35.90 | k | 34.39 | g | 18.00 | g | 39.42 | d | ||
1984 | 24.77 | a | 27.89 | a | 31.59 | b | 32.32 | b | 37.13 | a | 42.14 | a | 48.97 | 49.40 | a | 40.41 | a | 34.29 | 30.69 | a | 22.03 | 35.14 | ||||
1985 | 21.19 | 22.36 | 26.13 | 35.20 | 37.77 | 44.43 | 52.83 | a | 47.07 | b | 38.93 | c | 33.66 | b | 18.28 | a | 14.40 | a | 32.69 | |||||||
1986 | 27.83 | a | 28.37 | a | 34.13 | 31.28 | a | 38.87 | 48.90 | a | 46.53 | a | 52.03 | a | 41.40 | 36.07 | b | 32.87 | 26.63 | a | 37.08 | |||||
1987 | 23.33 | a | 28.42 | d | 31.03 | b | 35.80 | j | 42.14 | c | 46.27 | d | 49.74 | d | 47.75 | c | 44.96 | e | 35.88 | f | 29.46 | d | 24.48 | f | 38.12 | c |
1988 | 23.92 | e | 25.76 | h | 28.08 | g | 35.43 | i | 38.04 | g | 45.48 | c | 50.46 | c | 47.17 | g | 43.41 | h | 41.09 | h | 32.81 | d | 23.08 | g | 38.17 | h |
1989 | 28.19 | j | 16.32 | 29.71 | j | 37.33 | i | 37.52 | j | 46.46 | f | 47.36 | f | 46.29 | g | 42.50 | f | 36.13 | h | 29.00 | f | 21.30 | h | 16.32 | k | |
1990 | 29.43 | h | 24.35 | h | 29.31 | e | 36.62 | i | 37.89 | d | 46.60 | e | 52.23 | a | 52.46 | e | 46.88 | e | 33.72 | m | 30.95 | k | 16.55 | i | 44.23 | f |
1991 | 23.27 | i | 32.04 | e | 29.44 | d | 31.46 | d | 36.93 | c | 43.17 | f | 50.79 | c | 53.08 | e | 45.81 | i | 34.81 | j | 33.00 | h | 28.96 | f | 38.96 | f |
1992 | 30.17 | h | 33.30 | f | 32.00 | b | 36.95 | i | 41.78 | d | 49.07 | 49.81 | d | 50.32 | f | 42.91 | h | 38.12 | g | 30.10 | i | 22.44 | d | 39.02 | g | |
1993 | 14.00 | i | 19.78 | e | 31.43 | h | 34.35 | g | 42.88 | e | 44.74 | c | 44.48 | d | 47.41 | d | 43.43 | g | 38.92 | g | 17.55 | h | 26.23 | e | 37.59 | f |
1994 | 27.42 | e | 24.33 | g | 29.89 | d | 34.13 | g | 41.44 | f | 44.70 | c | 51.55 | b | 48.97 | b | 47.83 | g | 33.35 | h | 25.43 | i | 26.38 | e | 38.15 | f |
1995 | 26.85 | e | 32.22 | e | 28.43 | h | 30.71 | i | 41.04 | c | 45.48 | a | 51.79 | c | 46.78 | h | 45.92 | f | 33.05 | j | 36.12 | f | 26.75 | c | 37.35 | f |
1996 | 27.07 | c | 21.73 | g | 30.53 | a | 36.39 | b | 37.00 | b | 42.52 | c | 53.24 | b | 50.87 | a | 42.00 | 36.77 | i | 30.07 | b | 26.72 | b | 37.64 | b | |
1997 | 23.97 | 27.56 | a | 30.32 | 32.12 | e | 43.22 | d | 43.27 | d | 49.96 | d | 52.24 | f | 46.30 | g | 36.96 | e | 33.41 | c | 23.64 | f | 35.64 | c | ||
1998 | 26.04 | e | 30.60 | h | 30.96 | g | 33.42 | f | 40.38 | b | 46.07 | b | 55.06 | 51.26 | d | 48.58 | f | 34.50 | g | 34.80 | e | 23.19 | e | 39.54 | e | |
1999 | 29.08 | g | 30.13 | e | 29.21 | c | 29.72 | e | 34.96 | e | 43.78 | c | 48.42 | e | 52.93 | c | 41.05 | i | 35.50 | g | 35.44 | e | 28.14 | c | 36.97 | c |
2000 | 24.32 | f | 30.88 | d | 28.35 | e | 35.00 | i | 40.96 | e | 46.14 | b | 49.18 | c | 49.07 | d | 44.50 | j | 37.14 | i | 26.32 | e | 24.97 | b | 36.98 | d |
2001 | 24.96 | g | 26.00 | d | 29.83 | h | 32.05 | i | 41.42 | g | 44.04 | e | 49.73 | e | 52.69 | e | 46.13 | g | 36.05 | i | 32.88 | d | 26.08 | f | 41.07 | g |
2002 | 25.77 | i | 25.82 | f | 25.56 | d | 31.68 | e | 37.58 | g | 47.86 | h | 51.52 | d | 48.00 | g | 44.91 | h | 31.56 | d | 28.00 | g | 29.96 | e | 34.05 | g |
2003 | 32.59 | d | 25.91 | f | 34.46 | g | 32.77 | d | 39.40 | f | 48.03 | 52.77 | 51.55 | 46.67 | 40.35 | 27.26 | c | 27.48 | b | 39.94 | c | |||||
2004 | 21.83 | b | 28.38 | 32.93 | c | 34.07 | a | 41.40 | a | 47.33 | 52.83 | a | 54.90 | a | 43.66 | a | 38.48 | 28.93 | a | 29.43 | a | 37.85 | ||||
2005 | 26.39 | 24.93 | 31.93 | a | 34.10 | a | 44.03 | 44.34 | a | 52.34 | b | 51.65 | 42.20 | 39.08 | e | 29.48 | a | 20.63 | a | 36.76 | ||||||
2006 | 31.84 | 23.76 | c | 29.90 | b | 35.27 | 42.17 | a | 49.17 | 54.33 | a | 49.69 | b | 43.83 | 33.63 | a | 31.57 | 24.52 | 37.47 | |||||||
2007 | 21.55 | 28.23 | b | 31.68 | 31.97 | a | 40.19 | 46.00 | 55.00 | 49.71 | c | 43.07 | 36.16 | 29.13 | 25.85 | d | 36.55 | |||||||||
2008 | 21.30 | a | 28.50 | a | 26.45 | 28.67 | c | 40.97 | a | 42.45 | a | 51.77 | 52.35 | 43.24 | a | 36.74 | 34.25 | j | 17.15 | k | 37.24 | b | ||||
2009 | 24.64 | c | 26.67 | p | 25.91 | i | 32.55 | h | 38.90 | k | 48.27 | d | 50.12 | w | ----- | z | ----- | z | 35.40 | p | 28.24 | e | 18.20 | a | 29.84 | h |
2010 | 31.48 | 28.63 | a | 24.93 | d | 30.11 | c | 35.50 | a | 42.15 | c | 47.94 | 46.19 | d | 44.31 | a | 37.60 | a | 29.53 | 25.80 | a | 35.35 | ||||
2011 | 26.50 | e | 22.65 | e | 30.04 | f | 28.20 | e | 33.69 | e | 41.30 | c | 45.54 | e | 49.04 | g | 44.54 | d | 35.48 | j | 26.50 | h | 19.45 | k | 34.63 | e |
2012 | 24.41 | n | 25.71 | o | 26.19 | o | 33.33 | r | 36.25 | k | 41.94 | m | 49.54 | e | 48.21 | l | 42.30 | g | 35.28 | f | 30.64 | e | 24.96 | h | 40.09 | j |
2013 | 18.81 | j | 24.22 | j | 28.24 | f | 30.25 | n | 39.04 | f | 45.19 | i | 50.40 | f | 51.44 | o | 46.91 | s | 32.47 | l | 26.13 | g | 15.18 | n | ----- | z |
2014 | 26.43 | q | 13.60 | w | 23.83 | y | 31.67 | x | 37.69 | r | 40.85 | j | 50.33 | m | 52.79 | q | 46.75 | r | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.48 | 26.59 | 28.97 | 32.01 | 38.86 | 44.69 | 49.68 | 49.35 | 42.79 | 35.26 | 28.88 | 25.18 | 35.10 | |||||||||||||
S.D. | 5.89 | 3.77 | 2.83 | 2.27 | 2.73 | 2.40 | 2.72 | 2.83 | 1.89 | 2.42 | 4.29 | 3.74 | 1.55 | |||||||||||||
SKEW | -1.34 | -0.47 | -0.41 | -0.34 | 0.03 | 0.06 | -0.04 | -0.18 | 0.15 | 0.22 | -0.97 | -1.08 | -0.06 | |||||||||||||
MAX | 34.14 | 34.25 | 34.13 | 36.39 | 44.03 | 49.17 | 55.06 | 54.90 | 46.88 | 40.35 | 35.44 | 29.96 | 37.85 | |||||||||||||
MIN | 6.63 | 16.32 | 22.23 | 26.83 | 33.69 | 39.87 | 44.48 | 43.84 | 38.93 | 30.58 | 18.28 | 14.40 | 32.15 | |||||||||||||
YRS | 34 | 33 | 35 | 32 | 36 | 41 | 43 | 36 | 30 | 27 | 34 | 34 | 21 |