YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.43 | c | 62.57 | 54.23 | 47.83 | 40.23 | a | 53.86 | g | |||
1977 | 35.90 | b | 45.84 | 45.11 | 53.02 | 53.66 | 63.32 | 65.13 | 71.34 | 60.67 | 53.81 | 44.15 | 42.73 | 52.89 | ||||||||||||
1978 | 41.65 | ----- | z | 49.92 | a | 51.62 | 55.45 | a | 65.58 | 68.67 | a | 67.20 | a | 61.17 | 56.34 | 40.73 | 36.15 | 54.04 | a | |||||||
1979 | 31.55 | 41.00 | a | 50.03 | a | 51.72 | c | 59.19 | 63.22 | 69.08 | 67.32 | ----- | z | ----- | z | 44.83 | 44.32 | 52.23 | b | |||||||
1980 | 34.93 | a | 42.79 | a | 45.58 | f | 51.96 | c | 54.56 | d | 58.18 | h | 68.75 | k | 64.41 | b | 62.91 | b | 55.46 | g | 46.83 | a | 42.50 | f | 51.20 | e |
1981 | 44.09 | h | 43.24 | i | 48.69 | e | 52.48 | a | 56.22 | a | 60.48 | d | 64.50 | h | 71.96 | h | 64.02 | a | 52.50 | c | 47.76 | g | 41.89 | h | 55.73 | f |
1982 | 38.19 | d | 42.57 | e | 45.53 | a | 47.81 | c | 57.23 | e | 66.56 | e | 64.89 | d | 66.34 | c | 62.57 | b | 54.52 | a | 42.88 | a | 41.50 | g | 53.55 | a |
1983 | 42.48 | h | 46.35 | b | 50.38 | e | 52.15 | c | 59.12 | b | 61.30 | c | 64.98 | a | 67.80 | d | 59.95 | a | 52.64 | b | 47.35 | c | 35.79 | c | 54.35 | a |
1984 | 40.91 | d | 44.78 | d | 50.06 | e | 48.89 | b | 55.73 | g | 60.48 | d | 68.19 | b | 68.02 | f | 62.75 | f | 51.98 | b | 45.25 | 37.08 | a | 49.74 | c | |
1985 | 36.62 | b | 39.94 | a | 46.03 | a | 53.60 | a | 57.57 | d | 64.36 | b | 72.27 | c | 68.10 | f | 60.16 | e | 52.11 | c | 36.64 | e | 34.30 | f | 51.93 | b |
1986 | 43.35 | d | 45.27 | b | 53.46 | d | 50.42 | f | 58.38 | e | 66.42 | d | 65.30 | f | 71.80 | c | ----- | z | 55.90 | e | 46.52 | b | 40.69 | d | 53.53 | c |
1987 | 39.23 | e | 45.47 | j | 50.09 | c | 55.24 | i | 60.80 | a | 66.24 | c | 66.65 | d | 70.65 | e | 66.23 | b | 59.06 | d | 48.81 | c | 40.09 | d | 56.79 | b |
1988 | 39.41 | d | 44.97 | j | 48.79 | e | 53.33 | g | 56.72 | f | 63.38 | f | 69.61 | c | 69.44 | f | 64.88 | e | 59.45 | i | 46.78 | e | 41.39 | d | 51.81 | f |
1989 | 41.95 | c | 35.29 | d | 45.04 | e | 55.75 | f | 58.46 | h | 65.32 | h | 66.10 | f | 66.40 | g | 67.71 | f | 55.40 | b | 48.48 | f | 41.52 | g | 44.42 | h |
1990 | 43.00 | e | 41.87 | b | 50.45 | 55.56 | e | 56.72 | d | 63.59 | b | 71.76 | d | 70.12 | e | 67.95 | h | 52.23 | g | 46.75 | b | 33.44 | d | 53.33 | b | |
1991 | 40.09 | b | 47.94 | d | 46.34 | c | 51.60 | e | 55.62 | c | 61.68 | h | 69.77 | e | 69.69 | d | 69.15 | f | 57.77 | i | 48.64 | e | 41.50 | b | 52.35 | c |
1992 | 43.73 | g | 48.58 | j | 53.43 | d | 56.44 | d | 64.62 | f | 68.06 | f | 71.19 | e | 70.24 | f | 63.00 | k | 57.23 | g | 46.20 | j | 39.38 | e | 55.11 | h |
1993 | 37.42 | e | 41.83 | d | 49.31 | e | 52.04 | d | 62.02 | c | 62.31 | d | 63.96 | d | 68.64 | c | 66.48 | c | 57.19 | b | 39.67 | c | 39.78 | d | 53.39 | |
1994 | 43.90 | k | 38.33 | d | 50.60 | e | 54.67 | c | 61.50 | d | 63.31 | f | 71.93 | a | 69.57 | a | 67.26 | c | 52.41 | d | 41.07 | c | 41.56 | d | 54.89 | b |
1995 | 43.34 | b | 47.00 | a | 48.38 | f | 52.20 | b | 61.40 | b | 65.29 | b | 71.32 | f | 67.70 | h | 68.44 | d | 54.85 | g | 49.54 | e | 41.56 | g | 55.32 | e |
1996 | 40.41 | b | 39.44 | d | 48.56 | 53.52 | b | 56.41 | b | 64.63 | g | 73.59 | b | 71.98 | d | 62.16 | b | 53.39 | c | 45.23 | b | 41.83 | e | 53.32 | a | |
1997 | 41.00 | a | 45.31 | d | 46.76 | d | 51.58 | d | 62.43 | d | 62.83 | g | 69.12 | g | 72.32 | c | 65.23 | o | 54.29 | g | 48.33 | c | 40.11 | c | 50.98 | d |
1998 | 43.21 | b | 46.48 | d | 49.85 | e | 53.75 | b | 55.48 | i | 64.80 | c | 70.48 | h | 71.98 | d | 68.77 | h | 55.35 | h | 46.89 | g | 40.17 | g | 55.01 | f |
1999 | 42.23 | c | 43.10 | b | 45.89 | c | 53.24 | e | 53.63 | e | 60.66 | h | 68.23 | e | 71.80 | f | 68.50 | j | 56.35 | h | 46.52 | g | 41.48 | c | 49.69 | e |
2000 | 38.29 | b | 43.02 | d | 44.38 | e | 54.42 | d | 55.96 | g | 64.75 | d | 68.28 | d | 69.79 | e | 65.48 | d | 53.77 | i | 43.30 | e | 38.94 | d | 53.07 | b |
2001 | 40.79 | b | 42.27 | b | 47.23 | a | 50.54 | c | 61.24 | j | 61.15 | d | 66.46 | f | 69.02 | c | 64.50 | i | 54.35 | g | 46.82 | h | 41.85 | h | 51.83 | f |
2002 | 40.61 | l | 44.67 | j | 47.43 | q | 50.17 | c | 56.79 | g | 63.35 | d | 69.75 | g | 68.79 | g | 64.68 | m | 55.39 | i | 45.48 | d | 41.36 | f | 53.00 | i |
2003 | 44.58 | e | 43.66 | c | 48.07 | i | 50.27 | 56.50 | e | 66.35 | d | 72.00 | c | 70.10 | f | 65.02 | f | 58.57 | h | 44.57 | p | 40.71 | e | 53.44 | e | |
2004 | 37.83 | m | 45.32 | o | 50.19 | e | 55.72 | e | 57.45 | i | 65.12 | f | 72.04 | g | 70.24 | d | 60.17 | l | 55.52 | i | 41.97 | k | 41.27 | i | 58.72 | i |
2005 | 38.85 | k | 42.65 | h | 49.80 | d | 51.71 | i | 61.16 | f | 61.00 | g | 70.00 | e | 70.86 | i | 61.22 | l | 55.53 | n | 43.50 | 38.52 | d | 50.45 | h | |
2006 | 44.66 | f | 40.80 | f | 46.22 | d | 54.19 | d | ----- | z | 65.74 | k | 67.97 | a | 66.56 | 62.80 | b | 51.31 | g | 43.18 | h | 37.27 | e | 55.84 | f | |
2007 | 35.12 | k | 41.83 | h | 46.29 | l | 46.61 | k | 55.06 | d | 59.66 | b | 68.17 | a | 64.54 | c | 59.52 | c | 51.02 | d | 43.13 | c | 38.17 | h | 57.30 | e |
2008 | 36.20 | a | 42.02 | b | 41.19 | d | 45.19 | d | 55.81 | g | 58.58 | e | 66.61 | i | 66.23 | 62.72 | 57.38 | w | 47.02 | f | 35.98 | e | 48.51 | d | ||
2009 | 36.97 | 39.41 | a | 41.52 | e | 47.09 | b | 56.50 | b | 60.62 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.02 | f | |
2010 | ----- | z | ----- | z | ----- | z | 48.33 | a | 52.75 | a | 56.96 | e | 64.13 | e | 67.25 | e | 60.92 | 52.83 | a | 42.83 | 40.40 | 54.05 | c | |||
2011 | 39.47 | 37.22 | c | 43.95 | 44.45 | a | 51.80 | c | 58.41 | b | 62.93 | b | 65.84 | f | 65.33 | f | 50.95 | c | 42.59 | b | 37.19 | e | 46.90 | b | ||
2012 | 38.56 | d | 40.96 | e | 42.50 | d | 49.08 | d | 54.81 | e | 58.45 | i | 65.28 | h | 67.05 | i | 63.05 | k | 52.62 | g | 46.62 | b | 40.26 | d | 44.68 | e |
2013 | 34.87 | e | 41.68 | f | 45.52 | e | 49.48 | e | 56.36 | f | 62.82 | m | 67.31 | m | 68.18 | l | 60.16 | k | 50.97 | p | 42.73 | d | 33.85 | d | 41.29 | g |
2014 | 38.43 | i | 37.98 | h | 46.50 | l | 49.02 | j | 56.73 | p | 60.35 | q | 67.50 | s | 71.82 | n | 65.40 | 55.80 | u | 44.64 | h | 43.95 | j | 65.40 | k | |
2015 | 41.73 | g | 48.50 | k | 49.87 | p | 49.24 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 39.41 | 42.55 | 47.64 | 51.51 | 57.06 | 62.77 | 68.41 | 68.66 | 63.31 | 53.90 | 44.74 | 39.26 | 53.14 | |||||||||||||
S.D. | 3.16 | 3.18 | 3.15 | 2.94 | 3.01 | 2.85 | 3.01 | 2.52 | 2.60 | 2.25 | 3.09 | 2.70 | 0.35 | |||||||||||||
SKEW | -0.46 | -0.32 | -0.24 | -0.59 | 0.28 | -0.35 | -0.17 | -0.22 | 0.33 | 0.72 | -0.60 | -0.51 | 0.00 | |||||||||||||
MAX | 44.58 | 47.94 | 53.46 | 56.44 | 62.43 | 66.56 | 73.59 | 72.32 | 68.44 | 59.06 | 49.54 | 44.32 | 53.39 | |||||||||||||
MIN | 31.55 | 35.29 | 41.19 | 44.45 | 51.80 | 56.96 | 62.93 | 64.41 | 59.52 | 50.95 | 36.64 | 33.44 | 52.89 | |||||||||||||
YRS | 27 | 25 | 31 | 31 | 24 | 23 | 23 | 23 | 20 | 17 | 27 | 26 | 2 |