YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1964 | ----- | z | ----- | z | 30.48 | 39.14 | b | 45.87 | 55.90 | 62.06 | 63.21 | c | 48.21 | a | 44.93 | a | 28.43 | 26.00 | 44.43 | b | ||||||
1965 | 27.97 | 26.71 | 30.48 | 41.00 | 45.68 | 51.73 | 59.32 | 58.97 | a | 45.18 | b | 43.47 | a | 37.00 | b | 28.00 | b | 41.29 | ||||||||
1966 | 23.59 | b | 26.07 | 33.65 | 40.00 | a | 49.80 | a | 56.27 | 60.74 | 61.68 | 54.40 | 44.48 | 35.43 | 29.52 | 42.97 | ||||||||||
1967 | 27.52 | 29.67 | a | 34.31 | e | 34.67 | 47.35 | 53.93 | 66.68 | 65.00 | a | 56.93 | 43.19 | 35.77 | 23.37 | a | 43.20 | |||||||||
1968 | 25.97 | 36.66 | 35.60 | a | 39.90 | 48.97 | b | 55.70 | 63.74 | 58.00 | a | 53.50 | 45.03 | 34.80 | 22.71 | 43.38 | ||||||||||
1969 | 32.23 | 30.75 | 33.29 | 39.53 | 49.13 | 54.63 | 63.17 | a | 64.27 | a | 53.50 | 38.58 | 33.00 | 26.47 | a | 43.21 | ||||||||||
1970 | 26.26 | 33.29 | 33.84 | 33.50 | 49.43 | a | 56.43 | 64.87 | 63.57 | a | 48.30 | 39.97 | 33.67 | 26.81 | 42.49 | |||||||||||
1971 | 24.97 | 29.29 | 30.23 | 38.20 | 45.90 | 54.37 | 63.87 | a | 66.81 | 51.63 | 39.97 | 30.87 | 24.13 | 41.68 | ||||||||||||
1972 | 24.13 | 28.66 | 39.16 | 41.13 | 47.65 | 58.37 | 63.70 | a | 61.35 | 53.20 | 46.10 | 32.33 | 23.10 | 43.24 | ||||||||||||
1973 | 24.90 | 34.14 | 33.55 | 39.77 | 51.65 | 56.87 | 63.79 | c | 60.94 | 50.27 | 41.81 | 30.03 | 27.42 | 42.93 | ||||||||||||
1974 | 24.48 | 26.54 | 37.35 | 39.30 | 51.87 | 58.33 | 64.60 | a | 58.93 | b | 55.07 | 47.58 | 35.74 | c | 27.06 | 43.91 | ||||||||||
1975 | 25.87 | 29.50 | 33.26 | 36.17 | 45.83 | a | 56.87 | 64.61 | 59.74 | h | 55.50 | 40.23 | 30.10 | 28.71 | 40.60 | a | ||||||||||
1976 | 25.42 | 33.17 | 33.35 | 39.93 | b | 50.70 | a | 52.39 | b | 64.17 | a | 57.52 | b | 55.00 | a | 44.42 | g | 31.93 | 22.87 | a | 42.40 | a | ||||
1977 | 24.25 | g | 29.39 | j | ----- | z | ----- | z | 45.37 | l | 61.20 | t | 59.53 | n | 67.30 | h | 47.17 | g | 44.65 | k | 30.70 | t | ----- | z | ----- | z |
1978 | ----- | z | 32.14 | f | 39.12 | g | 40.34 | a | 45.88 | e | 56.48 | a | 59.83 | g | 58.57 | a | 53.30 | c | 46.23 | 38.20 | o | ----- | z | 50.13 | f | |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.30 | c | 60.62 | b | 59.42 | 54.07 | 44.71 | 30.17 | 27.10 | 47.20 | e | |||||
1980 | 32.45 | 36.34 | 33.58 | ----- | z | 48.10 | b | 53.37 | 64.30 | a | 60.55 | 55.37 | 42.84 | 33.27 | 31.48 | 44.70 | a | |||||||||
1981 | 30.65 | 31.75 | 37.42 | 45.30 | 51.87 | 62.60 | 65.97 | 64.13 | 57.07 | b | 43.97 | 38.23 | 28.48 | 46.45 | ||||||||||||
1982 | 25.13 | 30.29 | 34.83 | a | 40.00 | 48.70 | a | 54.13 | 61.45 | 62.19 | 53.83 | 39.10 | 30.67 | 27.27 | a | 42.30 | ||||||||||
1983 | 29.61 | 34.54 | 36.77 | 36.90 | 46.29 | 55.07 | 63.35 | 63.93 | a | 59.53 | 45.19 | 34.67 | 28.55 | 44.53 | ||||||||||||
1984 | 28.29 | 27.41 | 33.84 | 37.87 | 52.81 | 58.20 | 67.03 | b | 64.61 | 57.00 | 40.00 | 32.20 | 26.68 | 43.83 | ||||||||||||
1985 | 27.48 | 28.25 | 34.39 | 44.67 | 51.06 | 60.63 | 67.52 | 59.45 | 51.57 | 44.42 | 31.52 | a | 29.84 | 44.23 | ||||||||||||
1986 | 32.42 | 35.54 | 41.52 | 42.30 | 50.97 | 60.23 | 61.61 | 66.61 | 50.43 | 43.19 | 34.27 | 27.84 | 45.58 | |||||||||||||
1987 | 25.81 | 31.54 | 34.03 | 45.77 | 52.87 | 60.77 | 60.97 | 63.13 | 56.37 | 48.68 | 35.93 | 26.74 | 45.22 | |||||||||||||
1988 | 26.06 | 31.72 | 33.45 | b | 43.00 | 47.94 | 60.37 | 65.81 | 64.09 | h | 51.40 | 47.84 | 33.60 | 25.55 | b | 42.43 | a | |||||||||
1989 | 22.93 | c | 26.04 | c | 38.45 | b | 48.39 | b | 50.15 | e | 57.61 | b | 64.97 | a | 59.38 | b | 51.10 | j | 40.92 | g | 32.55 | h | 25.54 | c | 43.72 | c |
1990 | 25.16 | f | 26.12 | d | 36.93 | b | 46.00 | b | 49.58 | e | 59.92 | e | 65.75 | g | 60.17 | h | 56.38 | i | 40.33 | s | 32.80 | 15.86 | i | 41.89 | f | |
1991 | 26.16 | 31.88 | b | 33.04 | g | 39.93 | c | 45.88 | f | 57.55 | j | 64.92 | g | 62.42 | 57.96 | e | 47.00 | g | 34.00 | f | 28.79 | g | 43.67 | g | ||
1992 | 26.75 | c | 36.28 | d | 38.83 | g | 45.00 | d | 53.54 | c | 56.96 | b | 62.63 | d | 64.78 | h | 54.74 | c | 46.68 | c | 32.63 | k | 23.39 | c | 45.11 | c |
1993 | 28.56 | d | 32.27 | b | 38.60 | a | 41.78 | c | 49.20 | f | 56.90 | 60.43 | h | 60.96 | c | 50.60 | e | 42.11 | d | 29.17 | 23.63 | d | 40.46 | b | ||
1994 | 25.36 | c | 27.36 | f | 39.32 | i | 41.43 | i | 49.70 | d | 60.32 | b | 65.04 | g | 64.07 | d | 54.04 | c | 41.46 | c | 27.43 | g | 25.67 | m | 49.16 | f |
1995 | 32.38 | e | 35.22 | e | 36.04 | d | 38.00 | d | 46.46 | c | 54.23 | d | 61.68 | f | 63.45 | b | 55.60 | 41.68 | c | 34.29 | f | 28.76 | f | 44.78 | c | |
1996 | 25.96 | g | 32.29 | e | 34.58 | e | 40.92 | f | 51.39 | c | 57.90 | i | 67.42 | g | 62.82 | i | 53.32 | b | 41.13 | 35.38 | d | 28.27 | a | 39.48 | e | |
1997 | 26.72 | b | 31.90 | g | 35.32 | f | 40.04 | c | 54.52 | d | 57.90 | 60.96 | g | 63.64 | c | 58.85 | c | 41.33 | a | 35.18 | b | 26.59 | b | 44.97 | c | |
1998 | 28.62 | o | 30.92 | d | 34.81 | j | 37.23 | d | 43.29 | g | 50.20 | o | 64.94 | n | 64.41 | n | 59.20 | o | 39.93 | q | 30.91 | s | 23.00 | w | 34.07 | j |
1999 | 25.85 | r | 28.60 | r | 35.65 | n | 37.89 | k | 45.00 | o | ----- | z | 63.11 | m | 60.38 | j | 54.15 | q | 43.64 | t | ----- | z | 22.75 | o | ----- | z |
2000 | 25.00 | p | 31.25 | q | 35.71 | q | 42.69 | q | 51.56 | d | 61.65 | g | 59.61 | m | 64.57 | j | 53.41 | h | 43.50 | m | 29.00 | u | ----- | z | 51.56 | k |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.67 | x | 60.83 | m | 61.80 | p | 55.80 | o | 46.75 | s | 34.88 | n | 24.47 | n | ----- | z |
2002 | 23.18 | n | 27.00 | k | 27.25 | s | 43.15 | q | 46.10 | u | 60.44 | n | 68.10 | k | 60.79 | l | 52.46 | q | 40.00 | o | 32.40 | e | 24.95 | l | 32.40 | k |
2003 | 30.22 | d | 29.92 | b | 36.62 | b | 40.12 | f | 48.20 | f | 59.96 | g | 68.27 | a | 64.93 | c | 55.93 | 47.00 | a | 32.82 | b | 27.29 | 43.67 | c | ||
2004 | 26.68 | 29.41 | 42.29 | c | 44.54 | b | 48.56 | d | 58.53 | 64.06 | 62.80 | a | 52.70 | c | 44.93 | b | 34.73 | 29.29 | 44.88 | |||||||
2005 | 34.31 | b | 35.25 | 35.58 | 39.31 | a | 50.46 | c | 56.74 | g | 65.55 | b | 64.30 | k | 52.19 | d | 45.68 | f | 35.96 | b | 25.55 | k | 43.58 | d | ||
2006 | 26.58 | g | 27.94 | j | 32.21 | c | 39.20 | t | 55.14 | i | 63.58 | f | 70.48 | 63.52 | 55.34 | a | 45.45 | 33.17 | 27.45 | 46.80 | e | |||||
2007 | 24.74 | ----- | z | 39.94 | 46.00 | 53.42 | 60.30 | 69.59 | b | 67.29 | 58.67 | 44.81 | 38.07 | 29.13 | 48.36 | a | ||||||||||
2008 | 29.13 | a | 33.34 | 37.90 | 42.90 | 49.42 | s | 63.86 | p | 68.39 | 66.26 | 57.20 | 46.03 | 40.60 | 28.74 | 45.05 | b | |||||||||
2009 | 31.74 | 34.68 | 36.81 | 43.40 | 59.26 | 59.93 | a | 68.70 | a | 64.13 | 58.73 | 42.16 | 33.43 | 26.81 | d | 46.65 | ||||||||||
2010 | 30.87 | 34.25 | 36.45 | 40.30 | 46.77 | 59.43 | 68.45 | ----- | z | ----- | z | 47.58 | 31.50 | 32.06 | 42.77 | b | ||||||||||
2011 | 26.54 | g | 26.93 | 35.87 | 40.16 | e | 44.39 | h | 55.57 | 63.97 | a | 62.19 | 56.10 | 43.81 | 28.83 | 24.19 | 43.76 | b | ||||||||
2012 | 26.29 | 30.52 | 34.45 | 43.60 | 52.00 | 58.70 | 65.03 | 67.74 | 57.20 | 45.32 | 34.57 | 28.60 | a | 45.34 | ||||||||||||
2013 | 25.06 | 28.88 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.06 | k | |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | 32.60 | a | 36.11 | a | 39.10 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.36 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.68 | 31.40 | 35.44 | 40.92 | 49.83 | 57.14 | 64.69 | 62.66 | 54.25 | 43.76 | 33.48 | 26.94 | 43.87 | |||||||||||||
S.D. | 3.02 | 3.28 | 2.82 | 3.32 | 2.96 | 2.65 | 2.71 | 2.72 | 3.17 | 2.64 | 2.73 | 2.34 | 1.48 | |||||||||||||
SKEW | 0.57 | -0.09 | 0.38 | 0.09 | 0.72 | -0.06 | 0.21 | -0.10 | -0.65 | -0.15 | 0.27 | -0.12 | 0.24 | |||||||||||||
MAX | 34.31 | 36.66 | 42.29 | 48.39 | 59.26 | 62.60 | 70.48 | 67.74 | 59.53 | 48.68 | 40.60 | 32.06 | 46.65 | |||||||||||||
MIN | 22.93 | 26.04 | 30.23 | 33.50 | 45.68 | 51.73 | 59.32 | 57.52 | 45.18 | 38.58 | 28.43 | 22.71 | 41.29 | |||||||||||||
YRS | 38 | 38 | 37 | 38 | 37 | 37 | 35 | 36 | 40 | 38 | 38 | 37 | 20 |