YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | 31.85 | s | 39.64 | b | 49.77 | 54.29 | 58.27 | 67.56 | 65.87 | 62.55 | 53.90 | 31.43 | 32.45 | 51.57 | b | |||||||||
1953 | 41.96 | c | 38.09 | 40.72 | b | 43.75 | 50.15 | 53.75 | 65.26 | 64.10 | 61.60 | 49.53 | 43.48 | 37.68 | 49.17 | |||||||||||
1954 | 33.68 | 39.88 | 37.28 | b | 46.50 | 53.65 | 56.28 | 63.87 | a | 60.47 | 55.98 | 45.71 | 42.87 | 30.66 | b | 47.23 | ||||||||||
1955 | 30.62 | a | 34.00 | 36.39 | 41.34 | b | 50.39 | 59.97 | 62.42 | a | 64.95 | a | 58.38 | a | 49.27 | 36.50 | 33.58 | 46.48 | ||||||||
1956 | 33.84 | 31.60 | 43.17 | b | 50.38 | 56.52 | 58.59 | a | 67.76 | 64.69 | 60.28 | 47.77 | a | 36.55 | 36.42 | a | 48.96 | |||||||||
1957 | 18.27 | c | 36.89 | 40.58 | 47.73 | 55.61 | 61.52 | 63.65 | a | 61.60 | 60.88 | a | 46.45 | a | 37.13 | 38.16 | 47.37 | |||||||||
1958 | 36.43 | b | 43.48 | 38.87 | 45.67 | 57.52 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.11 | 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 | 64.43 | 66.02 | 67.13 | 62.03 | 49.65 | 41.59 | b | 37.05 | a | 55.41 | e | |||||
1975 | 36.72 | b | 33.79 | 37.89 | 39.78 | a | 51.08 | 57.40 | 68.52 | 63.10 | b | 60.02 | 48.31 | 39.08 | 36.66 | 47.70 | ||||||||||
1976 | 34.95 | a | 34.39 | a | 37.68 | 42.60 | 52.40 | a | 55.77 | 66.02 | a | 63.15 | 60.75 | 49.30 | a | 41.13 | 32.89 | 47.58 | ||||||||
1977 | 27.11 | 37.48 | 38.55 | 49.22 | 48.31 | 63.72 | 65.56 | 70.71 | 56.07 | 48.47 | 37.23 | 35.10 | 48.13 | |||||||||||||
1978 | 32.90 | 38.41 | 43.55 | 44.83 | 49.53 | 60.67 | 66.60 | 64.50 | 55.30 | 49.94 | 30.33 | 30.03 | 47.22 | |||||||||||||
1979 | 15.48 | a | 34.61 | 42.66 | 44.98 | 54.39 | 61.25 | 67.13 | 64.66 | 62.03 | 51.23 | 35.20 | 38.29 | 47.66 | ||||||||||||
1980 | 27.89 | 36.02 | a | 39.52 | a | 47.52 | 52.82 | 56.23 | 66.85 | 62.56 | 59.28 | a | 49.16 | 40.48 | 37.60 | 47.99 | ||||||||||
1981 | 33.45 | a | 35.06 | b | 41.05 | a | 46.02 | 51.58 | 57.80 | 63.94 | 69.29 | 59.47 | a | 47.29 | 41.30 | 35.06 | 48.44 | |||||||||
1982 | 30.54 | d | 35.46 | c | 39.41 | b | 42.55 | 51.50 | a | 61.54 | b | 65.18 | 65.79 | 56.17 | c | 46.16 | f | 35.30 | e | 33.04 | e | 46.95 | a | |||
1983 | 37.63 | a | 39.39 | f | 43.42 | e | 44.28 | c | 54.34 | 56.80 | b | 61.10 | a | 67.40 | 55.71 | d | 49.58 | k | 43.43 | g | 23.81 | g | 52.59 | d | ||
1984 | 33.65 | a | 37.21 | a | 42.88 | b | 43.23 | b | 50.53 | a | 56.38 | a | 67.03 | 66.87 | a | 55.90 | a | 45.79 | 38.61 | c | 30.23 | 47.36 | ||||
1985 | 27.68 | 33.41 | 39.03 | 50.18 | 53.98 | 61.83 | 72.25 | a | 64.29 | b | 53.30 | c | 47.50 | b | 27.10 | a | 21.22 | a | 45.98 | |||||||
1986 | 34.93 | a | 36.20 | a | 45.60 | 44.97 | a | 53.98 | 66.05 | a | 63.00 | a | 70.72 | a | 54.55 | 50.81 | b | 40.53 | 32.13 | a | 49.46 | |||||
1987 | 31.37 | a | 36.67 | d | 41.84 | b | 51.77 | j | 56.98 | d | 63.88 | d | 65.72 | d | 66.29 | c | 62.90 | e | 52.44 | f | 39.54 | d | 31.54 | f | 51.69 | c |
1988 | 31.46 | e | 38.48 | i | 41.15 | g | 47.62 | i | 52.77 | g | 60.07 | c | 68.32 | c | 66.58 | g | 60.39 | h | 56.65 | h | 40.56 | d | 32.35 | g | 50.10 | h |
1989 | 36.69 | j | 25.50 | 40.92 | k | 51.26 | i | 51.31 | j | 62.52 | f | 65.10 | f | 62.88 | g | 59.00 | f | 48.78 | h | 40.85 | f | 31.89 | h | 25.50 | k | |
1990 | 37.00 | h | 35.80 | h | 42.73 | e | 51.71 | i | 51.91 | d | 62.00 | e | 70.37 | a | 68.69 | e | 64.42 | e | 46.75 | m | 41.95 | k | 26.57 | i | 60.02 | f |
1991 | 33.43 | i | 43.00 | e | 40.35 | d | 45.17 | d | 50.55 | c | 57.48 | f | 68.88 | c | 70.96 | e | 63.52 | i | 49.21 | j | 41.23 | h | 35.08 | f | 53.15 | f |
1992 | 37.70 | h | 41.67 | f | 45.60 | b | 49.79 | i | 59.15 | d | 66.37 | 66.72 | d | 69.22 | f | 58.14 | h | 51.81 | g | 39.14 | i | 29.83 | e | 53.53 | g | |
1993 | 21.57 | i | 28.15 | e | 41.96 | h | 46.00 | g | 57.58 | e | 58.57 | c | 59.35 | d | 63.91 | d | 61.07 | g | 52.54 | g | 30.18 | h | 33.00 | e | 50.09 | f |
1994 | 37.81 | e | 34.05 | g | 43.80 | d | 47.30 | g | 56.74 | f | 60.15 | c | 71.12 | b | 67.60 | b | 64.26 | g | 47.35 | h | 35.14 | i | 35.88 | e | 52.73 | f |
1995 | 32.71 | e | 42.13 | e | 40.68 | i | 43.29 | i | 55.14 | c | 59.41 | a | 67.39 | c | 63.74 | h | 62.65 | f | 46.38 | j | 44.98 | f | 33.57 | c | 48.39 | f |
1996 | 35.21 | c | 31.09 | g | 41.85 | a | 48.98 | b | 51.16 | b | 59.70 | c | 71.31 | b | 69.28 | a | 57.62 | 49.52 | i | 39.96 | b | 34.86 | b | 50.99 | b | |
1997 | 33.11 | 36.37 | a | 43.05 | 45.00 | e | 58.91 | d | 58.83 | d | 66.59 | d | 69.36 | f | 60.65 | g | 49.37 | e | 41.80 | c | 32.58 | g | 48.11 | c | ||
1998 | 35.33 | e | 39.10 | h | 42.50 | g | 46.31 | f | 51.76 | b | 61.34 | b | 72.74 | 69.96 | d | 65.10 | f | 47.21 | g | 41.98 | e | 31.81 | e | 52.13 | e | |
1999 | 37.90 | g | 39.27 | f | 40.16 | c | 42.88 | e | 49.94 | e | 58.80 | c | 66.62 | e | 69.45 | c | 58.38 | i | 49.58 | g | 44.70 | e | 35.32 | c | 50.98 | d |
2000 | 30.74 | f | 37.48 | d | 40.96 | e | 50.19 | i | 54.28 | f | 62.96 | b | 66.73 | c | 67.87 | d | 59.17 | j | 47.73 | i | 34.02 | e | 31.71 | b | 48.82 | e |
2001 | 32.24 | h | 34.38 | d | 42.43 | h | 43.88 | i | 57.65 | g | 59.38 | e | 66.44 | e | 70.92 | e | 62.41 | g | 51.02 | i | 41.19 | d | 33.26 | f | 54.46 | g |
2002 | 33.48 | i | 37.61 | f | 38.39 | d | 46.64 | e | 51.79 | g | 64.00 | h | 69.98 | d | 65.90 | g | 61.43 | h | 46.17 | d | 39.41 | g | 36.25 | e | 47.49 | g |
2003 | 38.39 | d | 36.89 | f | 45.17 | g | 45.04 | d | 52.82 | f | 64.32 | 72.24 | 68.95 | 63.42 | 53.71 | 35.59 | c | 34.55 | b | 52.91 | c | |||||
2004 | 28.09 | b | 37.00 | 45.73 | c | 48.79 | a | 54.93 | a | 62.77 | 70.32 | a | 70.87 | a | 58.78 | a | 51.18 | 39.38 | a | 37.33 | b | 50.43 | ||||
2005 | 34.03 | 36.09 | 44.25 | a | 46.84 | a | 56.74 | 59.05 | a | 70.74 | b | 70.23 | 58.67 | 51.63 | e | 37.67 | a | 27.83 | a | 49.48 | ||||||
2006 | 39.65 | 34.40 | c | 40.17 | b | 48.08 | 56.87 | a | 63.90 | 72.95 | a | 67.76 | b | 61.10 | 48.92 | a | 41.34 | b | 32.73 | 50.65 | ||||||
2007 | 29.87 | 37.54 | b | 45.82 | 46.19 | a | 56.21 | 61.95 | 72.71 | 67.27 | c | 59.35 | 47.82 | 38.73 | 34.81 | d | 49.86 | |||||||||
2008 | 31.15 | a | 38.75 | a | 39.61 | 43.17 | c | 54.43 | a | 58.76 | a | 69.58 | 68.74 | 60.48 | a | 49.87 | 44.33 | j | 29.55 | k | 51.45 | b | ||||
2009 | 33.00 | c | 35.12 | p | 37.61 | i | 46.66 | h | 52.27 | k | 63.17 | d | 70.00 | w | ----- | z | ----- | z | 47.50 | p | 39.80 | e | 27.88 | a | 40.96 | h |
2010 | 38.82 | 38.78 | a | 40.67 | d | 43.56 | c | 49.10 | a | 56.72 | c | 66.74 | 64.33 | d | 59.28 | a | 50.50 | a | 38.60 | 32.73 | a | 48.32 | ||||
2011 | 36.42 | e | 33.35 | e | 40.92 | f | 41.46 | e | 48.42 | e | 57.33 | c | 63.38 | e | 69.12 | g | 63.98 | d | 50.10 | j | 39.39 | h | 32.70 | k | 49.19 | e |
2012 | 34.62 | n | 36.61 | o | 40.16 | o | 50.08 | r | 53.17 | k | 56.65 | m | 68.27 | e | 69.00 | l | 61.59 | g | 48.94 | f | 40.68 | e | 33.02 | h | 54.47 | j |
2013 | 28.12 | j | 36.78 | j | 41.26 | f | 46.97 | n | 54.20 | f | 62.17 | i | 71.66 | f | 69.50 | o | 65.82 | s | 47.86 | m | 37.13 | g | 26.35 | n | ----- | z |
2014 | 36.18 | q | 22.90 | w | 42.00 | y | 45.92 | x | 55.65 | r | 58.75 | j | 70.81 | m | 70.86 | q | 62.83 | r | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.77 | 36.11 | 41.23 | 45.53 | 53.28 | 60.19 | 67.32 | 66.80 | 59.34 | 49.20 | 38.57 | 33.48 | 48.27 | |||||||||||||
S.D. | 5.38 | 3.67 | 2.57 | 2.74 | 2.99 | 2.98 | 3.22 | 2.92 | 2.96 | 2.14 | 3.80 | 3.57 | 1.27 | |||||||||||||
SKEW | -1.35 | -0.53 | 0.18 | 0.02 | 0.17 | 0.12 | -0.14 | -0.25 | -0.21 | 0.35 | -1.13 | -1.21 | 0.25 | |||||||||||||
MAX | 41.96 | 43.48 | 45.82 | 50.38 | 59.15 | 66.37 | 72.95 | 70.96 | 64.42 | 53.90 | 44.70 | 38.29 | 50.65 | |||||||||||||
MIN | 15.48 | 25.50 | 36.39 | 39.78 | 48.31 | 53.75 | 59.35 | 60.47 | 53.30 | 45.71 | 27.10 | 21.22 | 45.98 | |||||||||||||
YRS | 34 | 32 | 35 | 32 | 35 | 41 | 43 | 36 | 30 | 26 | 34 | 34 | 20 |