YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1964 | ----- | z | ----- | z | 45.26 | 54.75 | b | 61.77 | 71.75 | 79.02 | a | 79.04 | c | 67.57 | a | 64.18 | a | 43.65 | 39.11 | 60.61 | b | |||||
1965 | 43.02 | 44.04 | 46.47 | 53.33 | 61.27 | 67.73 | 76.53 | 75.63 | a | 64.00 | c | 63.53 | a | 50.46 | c | 39.50 | b | 57.13 | ||||||||
1966 | 37.89 | c | 39.54 | 51.13 | 59.05 | a | 67.18 | a | 73.78 | 78.55 | 79.61 | 71.78 | 61.56 | 50.38 | 42.10 | a | 59.38 | |||||||||
1967 | 40.71 | 45.52 | b | 50.04 | e | 48.32 | 63.50 | 69.90 | 82.32 | a | 80.57 | a | 72.20 | 62.12 | b | 51.18 | 35.32 | a | 58.47 | |||||||
1968 | 39.98 | 50.16 | 50.82 | a | 55.07 | 64.89 | d | 74.30 | 79.45 | 73.62 | a | 70.98 | 60.95 | 48.98 | 35.90 | 58.76 | ||||||||||
1969 | 42.88 | a | 41.23 | 46.97 | 56.50 | 66.44 | 70.92 | 79.35 | a | 80.87 | a | 71.55 | 55.08 | a | 49.21 | a | 41.45 | a | 58.54 | |||||||
1970 | 40.32 | 47.93 | 48.44 | 50.68 | 66.71 | b | 73.60 | a | 80.62 | a | 79.27 | a | 67.17 | a | 56.98 | a | 48.93 | a | 38.58 | 58.27 | ||||||
1971 | 39.77 | 44.88 | 48.34 | 54.62 | 59.97 | 71.97 | 81.12 | a | 80.60 | 69.47 | a | 56.23 | 45.95 | a | 35.87 | a | 57.40 | |||||||||
1972 | 36.71 | 44.29 | 56.05 | 57.30 | 65.37 | 74.55 | 81.15 | a | 76.72 | a | 68.55 | 57.50 | a | 44.10 | 35.67 | a | 58.16 | |||||||||
1973 | 36.42 | 44.18 | 44.76 | 54.85 | 67.82 | 74.12 | 81.07 | c | 77.77 | 68.75 | 59.63 | a | 44.93 | 40.48 | 57.90 | |||||||||||
1974 | 34.38 | a | 41.77 | 51.80 | a | 55.50 | 68.69 | 75.42 | 80.05 | a | 76.86 | b | 73.17 | 61.72 | b | 48.69 | c | 38.76 | 58.90 | |||||||
1975 | 39.95 | 42.82 | 45.45 | 49.75 | 62.72 | b | 73.22 | 80.19 | 77.15 | h | 72.48 | 57.92 | a | 46.28 | 43.31 | 55.83 | a | |||||||||
1976 | 41.84 | 46.33 | 47.68 | 54.14 | b | 66.83 | a | 71.14 | b | 80.80 | a | 75.10 | b | 71.76 | a | 60.04 | g | 50.67 | 40.22 | a | 58.77 | a | ||||
1977 | 38.90 | j | 48.33 | j | ----- | z | ----- | z | 61.11 | m | 76.50 | t | 78.94 | n | 82.63 | h | 68.13 | g | 63.60 | k | 51.80 | t | ----- | z | ----- | z |
1978 | ----- | z | 45.42 | i | 53.48 | h | 54.91 | a | 63.42 | g | 74.52 | a | 79.08 | g | 78.02 | a | 71.22 | c | 64.71 | 50.93 | o | ----- | z | 68.68 | g | |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.96 | c | 80.07 | b | 75.82 | c | 74.52 | 63.36 | b | 46.14 | a | 43.28 | b | 65.59 | e | |
1980 | 43.35 | 48.68 | a | 47.21 | ----- | z | 61.98 | c | 72.28 | 82.36 | c | 78.90 | 73.10 | 60.73 | a | 50.00 | 47.53 | 60.56 | a | |||||||
1981 | 45.33 | b | 47.13 | a | 50.22 | a | 60.83 | 66.47 | 80.03 | 83.27 | 82.03 | 74.48 | b | 59.20 | a | 52.57 | 43.44 | 62.08 | ||||||||
1982 | 37.94 | 45.24 | c | 47.86 | c | 56.00 | f | 64.63 | d | 71.71 | f | 77.64 | f | 77.36 | j | 66.80 | h | 54.29 | g | 43.27 | b | 38.35 | d | 46.21 | f | |
1983 | 41.48 | b | 45.50 | d | 48.56 | g | 50.17 | g | 62.50 | g | 71.14 | e | 78.64 | f | 76.29 | g | 74.45 | i | 60.34 | f | 47.36 | e | 40.82 | a | 49.26 | g |
1984 | 42.58 | 43.14 | 51.02 | e | 55.45 | h | 72.17 | e | 74.90 | d | 82.88 | j | 79.06 | e | 74.29 | f | 54.63 | e | 46.55 | 36.71 | 55.64 | c | ||||
1985 | 39.43 | b | 40.31 | d | 48.31 | d | 62.30 | c | 67.92 | f | 78.86 | b | 84.80 | d | 78.92 | 67.02 | h | 61.30 | d | 44.63 | c | 43.50 | 58.24 | b | ||
1986 | 47.39 | c | 48.73 | b | 56.96 | c | 58.78 | e | 68.72 | d | 78.76 | c | 79.13 | e | 83.41 | b | 66.42 | d | 59.52 | f | 49.29 | a | 40.95 | a | 61.69 | a |
1987 | 37.77 | 45.44 | c | 48.59 | c | 63.06 | e | 68.72 | f | 78.14 | e | 79.04 | d | 80.82 | c | 73.81 | f | 65.65 | e | 47.69 | a | 37.53 | b | 58.37 | b | |
1988 | 37.33 | b | 47.28 | d | 50.42 | e | 58.29 | b | 65.83 | b | 76.76 | c | 84.15 | d | 82.09 | h | 71.42 | d | 67.39 | c | 47.39 | g | 39.19 | b | 59.81 | b |
1989 | 37.00 | c | 42.04 | e | 55.30 | c | 65.27 | b | 66.02 | e | 75.96 | b | 83.28 | a | 77.60 | b | 70.15 | j | 58.46 | g | 50.36 | h | 42.54 | c | 60.56 | c |
1990 | 38.84 | f | 40.79 | d | 52.50 | b | 61.32 | b | 65.58 | e | 77.72 | e | 82.79 | g | 77.07 | i | 74.50 | i | 59.21 | s | 48.83 | 30.52 | i | 57.79 | f | |
1991 | 39.84 | 49.18 | c | 45.83 | g | 55.78 | e | 62.28 | f | 74.12 | j | 82.23 | g | 79.47 | 74.02 | e | 63.29 | g | 48.58 | f | 40.88 | g | 59.66 | g | ||
1992 | 38.52 | c | 47.80 | d | 50.75 | g | 61.50 | d | 69.93 | c | 74.57 | b | 79.19 | d | 81.95 | k | 73.44 | c | 63.52 | c | 46.34 | k | 35.00 | c | 60.39 | c |
1993 | 38.13 | d | 42.17 | b | 52.37 | a | 57.44 | d | 66.50 | f | 72.98 | 79.00 | h | 78.88 | c | 70.40 | f | 59.30 | d | 44.40 | 38.48 | d | 53.79 | c | ||
1994 | 41.11 | c | 40.32 | f | 55.55 | i | 58.63 | k | 66.30 | f | 79.00 | b | 82.92 | g | 82.22 | d | 72.70 | c | 58.22 | d | 40.52 | h | 38.44 | n | 66.65 | g |
1995 | 40.54 | e | 51.18 | f | 48.52 | d | 53.12 | d | 60.45 | c | 70.71 | d | 80.32 | f | 81.57 | b | 74.48 | 60.54 | c | 52.29 | f | 43.38 | f | 61.24 | d | |
1996 | 41.98 | g | 46.54 | e | 50.71 | e | 58.25 | f | 68.82 | c | 77.19 | i | 85.21 | g | 82.20 | i | 70.89 | b | 58.34 | 48.48 | d | 39.88 | a | 54.81 | e | |
1997 | 38.29 | b | 46.24 | g | 54.02 | f | 56.44 | c | 71.67 | d | 74.92 | 78.67 | g | 80.82 | c | 73.19 | c | 58.90 | a | 50.07 | b | 39.14 | b | 60.38 | c | |
1998 | 41.53 | o | 41.19 | d | 48.00 | j | 51.29 | d | 58.60 | g | 68.33 | o | 81.71 | n | 82.44 | n | 74.97 | o | 57.39 | q | 46.32 | s | 41.36 | x | 46.24 | j |
1999 | 42.85 | r | 43.70 | r | 53.09 | n | 53.50 | k | 62.94 | o | ----- | z | 79.78 | m | 78.07 | j | 73.69 | q | 65.09 | t | ----- | z | 40.47 | o | ----- | z |
2000 | 41.73 | p | 46.50 | q | 50.36 | q | 63.12 | q | 69.44 | d | 79.55 | h | 79.86 | m | 81.48 | j | 71.98 | h | 58.78 | m | 42.44 | u | ----- | z | 69.44 | k |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.50 | x | 80.00 | m | 80.73 | p | 75.03 | o | 65.75 | s | 50.09 | n | 37.94 | n | ----- | z |
2002 | 37.88 | n | 44.85 | k | 47.79 | s | 63.15 | q | 66.75 | u | 79.34 | n | 85.47 | k | 80.13 | l | 73.23 | q | 58.56 | o | 48.82 | e | 38.58 | l | 48.82 | k |
2003 | 45.94 | d | 43.04 | b | 50.80 | c | 55.00 | f | 65.56 | f | 77.83 | g | 85.98 | a | 81.02 | c | 74.58 | 65.98 | a | 45.32 | b | 39.74 | 59.16 | c | ||
2004 | 39.82 | 40.33 | 58.07 | c | 59.73 | b | 65.94 | d | 76.07 | 81.21 | 79.47 | a | 71.35 | c | 59.53 | b | 46.72 | 41.47 | 59.98 | |||||||
2005 | 44.16 | b | 45.52 | 50.13 | 54.84 | a | 67.77 | c | 74.07 | g | 83.91 | b | 79.83 | k | 70.46 | d | 61.76 | f | 51.70 | b | 40.70 | k | 58.56 | d | ||
2006 | 41.15 | g | 46.47 | j | 45.59 | d | 54.70 | t | 72.82 | i | 82.02 | f | 86.06 | 80.85 | 72.22 | a | 60.15 | 49.37 | 40.48 | 62.10 | e | |||||
2007 | 39.03 | ----- | z | 56.56 | 61.60 | 70.40 | a | 78.58 | 86.64 | b | 83.26 | 74.92 | 61.55 | 54.73 | 39.87 | 64.29 | a | |||||||||
2008 | 40.25 | a | 46.14 | 53.63 | 59.07 | 65.04 | s | 82.96 | p | 85.13 | 83.87 | 75.28 | 63.44 | 55.00 | 40.23 | 60.20 | b | |||||||||
2009 | 44.60 | 46.00 | 52.11 | 58.63 | 74.97 | 74.55 | a | 85.62 | a | 81.77 | 76.90 | 57.76 | 50.08 | 38.20 | d | 61.77 | ||||||||||
2010 | 42.13 | 45.32 | 50.10 | 55.37 | 62.03 | 76.80 | 85.26 | ----- | z | ----- | z | 61.76 | 46.07 | 42.53 | 56.74 | b | ||||||||||
2011 | 39.11 | h | 41.73 | 50.06 | 56.60 | e | 60.28 | h | 73.28 | 80.63 | a | 80.84 | 74.03 | 60.73 | 44.48 | 39.10 | 60.15 | b | ||||||||
2012 | 41.74 | 44.24 | 50.16 | 59.40 | 69.18 | 77.52 | 78.53 | 82.02 | 74.40 | 62.03 | 50.78 | 40.15 | a | 60.85 | ||||||||||||
2013 | 38.08 | 43.19 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.08 | k | |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | 46.29 | b | 51.50 | a | 53.27 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.90 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.58 | 44.80 | 50.29 | 56.84 | 66.41 | 74.62 | 81.70 | 79.60 | 71.87 | 60.75 | 48.26 | 39.85 | 59.11 | |||||||||||||
S.D. | 3.00 | 2.98 | 3.37 | 3.87 | 3.57 | 2.92 | 2.69 | 2.46 | 2.82 | 3.04 | 2.95 | 2.67 | 1.53 | |||||||||||||
SKEW | 0.38 | 0.17 | 0.53 | -0.06 | 0.14 | -0.14 | 0.30 | -0.46 | -0.82 | 0.06 | 0.25 | 0.34 | 0.76 | |||||||||||||
MAX | 47.39 | 51.50 | 58.07 | 65.27 | 74.97 | 80.03 | 86.64 | 83.87 | 76.90 | 67.39 | 55.00 | 47.53 | 62.08 | |||||||||||||
MIN | 34.38 | 39.54 | 44.76 | 48.32 | 59.97 | 67.73 | 76.53 | 73.62 | 64.00 | 54.63 | 43.27 | 35.00 | 57.13 | |||||||||||||
YRS | 38 | 37 | 36 | 35 | 32 | 36 | 32 | 34 | 34 | 35 | 37 | 37 | 14 |