YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.70 | 60.73 | 61.47 | 59.20 | 53.97 | a | 51.63 | 43.93 | a | 55.52 | e | |||||
1984 | 46.73 | 48.34 | a | 50.73 | a | 48.58 | 53.10 | 55.60 | 58.61 | 60.92 | 59.36 | a | 53.20 | a | 49.33 | 42.23 | 52.23 | |||||||||
1985 | 43.52 | 44.48 | b | 44.53 | 50.05 | 52.56 | 56.72 | a | 60.45 | a | 58.95 | 56.40 | 53.63 | a | 42.60 | 43.19 | 50.59 | |||||||||
1986 | 48.89 | 48.46 | 51.68 | 48.80 | 52.62 | b | 58.43 | 58.90 | a | 59.38 | a | 57.05 | 55.28 | a | 51.23 | 46.79 | 53.13 | |||||||||
1987 | 45.81 | 47.82 | 49.38 | a | 51.47 | 55.48 | 57.00 | 58.68 | a | 59.33 | a | 58.07 | 57.02 | a | 51.65 | 43.68 | a | 52.95 | ||||||||
1988 | 45.15 | 47.26 | 47.52 | 50.65 | 52.90 | a | 56.48 | a | 59.84 | c | 58.85 | 57.70 | b | 57.60 | 50.42 | 45.50 | 52.49 | |||||||||
1989 | 44.18 | 40.56 | a | 47.42 | 53.45 | a | 53.11 | 57.05 | b | 59.52 | 61.00 | 58.83 | 54.62 | a | 50.53 | 46.42 | 52.22 | |||||||||
1990 | 46.71 | 44.75 | 49.47 | 51.77 | 53.38 | a | 58.02 | 61.40 | 62.48 | 62.03 | 54.05 | a | 49.62 | a | 39.45 | b | 52.76 | |||||||||
1991 | 44.16 | b | 52.19 | a | 46.05 | 48.82 | 51.47 | 55.26 | a | 60.92 | 60.61 | 61.72 | 56.68 | 51.72 | a | 45.93 | a | 52.96 | ||||||||
1992 | 47.58 | a | 52.60 | 52.63 | 54.53 | a | 56.80 | a | 59.65 | 61.40 | 61.41 | b | 57.91 | a | 56.68 | a | 49.68 | 44.53 | 54.62 | |||||||
1993 | 41.82 | a | 45.63 | a | 51.06 | 51.57 | 57.11 | 58.90 | 59.71 | b | 61.09 | b | 58.06 | d | 56.28 | a | 45.67 | a | 45.21 | 52.68 | ||||||
1994 | 47.83 | a | 44.57 | a | 50.05 | 51.77 | 55.33 | b | 57.20 | 59.81 | 62.52 | 61.03 | 53.85 | a | 44.86 | a | 46.13 | 52.91 | ||||||||
1995 | 48.57 | a | 50.26 | a | 48.35 | 50.05 | 54.35 | 57.79 | a | 62.47 | 60.74 | d | 62.69 | i | 55.75 | i | 54.05 | h | 48.93 | j | 54.07 | d | ||||
1996 | 46.41 | h | 47.90 | e | 49.07 | j | 51.48 | h | 52.15 | h | 57.40 | j | 60.35 | h | 60.55 | i | 59.31 | i | 55.55 | i | 50.50 | i | 48.52 | i | 47.90 | k |
1997 | 45.38 | f | 46.97 | i | 48.09 | i | 50.07 | h | 58.43 | h | 58.17 | i | 62.09 | h | 64.55 | j | 63.14 | h | 55.62 | j | 53.16 | k | 45.96 | f | ----- | z |
1998 | 48.62 | f | 48.77 | h | 48.00 | j | 49.17 | i | 53.12 | k | 56.12 | i | ----- | z | 61.57 | j | 59.70 | h | 56.00 | h | 50.25 | j | 43.59 | i | ----- | z |
1999 | 45.39 | i | 43.70 | f | 43.72 | b | 46.16 | a | 49.13 | 54.73 | 57.05 | 60.40 | 56.17 | a | 52.00 | 51.12 | a | 45.71 | b | 51.62 | b | |||||
2000 | 44.60 | f | 47.61 | j | 44.97 | m | 51.77 | j | 53.83 | h | 57.82 | k | 60.10 | k | 60.45 | i | 60.86 | i | 54.43 | j | 47.62 | j | 47.25 | k | ----- | z |
2001 | 46.33 | h | 45.08 | j | 48.55 | i | 48.32 | k | 53.76 | h | 56.30 | j | 58.47 | l | 60.78 | h | 58.74 | k | 54.00 | i | 51.80 | j | 46.02 | j | ----- | z |
2002 | 45.28 | h | 46.73 | h | 45.93 | j | 49.43 | h | 50.87 | h | 56.97 | l | 60.86 | j | 59.70 | k | 60.00 | j | 53.30 | i | 52.45 | k | 48.74 | j | ----- | z |
2003 | 50.91 | h | 46.24 | i | 49.98 | j | 50.10 | j | 54.55 | j | 58.13 | k | 60.79 | j | 62.12 | k | 60.14 | l | 56.89 | i | 46.82 | m | 46.71 | l | ----- | z |
2004 | 47.52 | j | 48.00 | i | 50.25 | i | 53.09 | h | 55.10 | k | 58.26 | i | 61.86 | i | 63.33 | j | 59.83 | j | 56.19 | j | 48.92 | j | 48.08 | k | ----- | z |
2005 | 46.74 | j | 51.03 | k | 50.85 | h | 51.02 | i | 55.62 | k | 57.91 | h | 62.39 | l | 60.02 | i | 57.08 | j | 56.25 | m | 49.18 | k | 46.00 | k | ----- | z |
2006 | 48.31 | j | 44.85 | h | 46.57 | i | 51.08 | l | 54.02 | j | 58.91 | h | 60.48 | j | 58.78 | h | 59.90 | j | 54.45 | j | 48.69 | i | 45.89 | l | ----- | z |
2007 | 42.93 | p | 46.20 | h | 47.66 | i | 49.67 | i | 53.36 | i | 56.34 | h | 61.45 | k | 62.41 | h | 56.65 | j | 54.13 | h | 48.80 | j | 44.25 | m | ----- | z |
2008 | 41.95 | l | 45.62 | h | 45.62 | j | 46.39 | h | 51.95 | k | 53.83 | i | 58.80 | h | 61.02 | j | 57.16 | h | 53.33 | k | 52.20 | j | 42.61 | h | ----- | z |
2009 | 45.55 | j | 46.52 | h | 45.41 | i | 48.16 | h | 52.58 | k | 58.14 | i | 60.61 | h | 61.60 | j | 61.50 | i | 54.16 | i | 50.07 | i | 42.00 | j | ----- | z |
2010 | 49.80 | k | 49.34 | i | 48.20 | h | 48.30 | h | 51.21 | j | 55.93 | h | 57.87 | h | 60.61 | i | 61.20 | h | 55.71 | j | 48.83 | i | 47.43 | h | ----- | z |
2011 | 46.02 | j | 43.77 | h | 47.48 | h | 46.27 | j | 51.05 | i | 56.43 | i | 59.85 | k | 61.52 | h | 60.93 | h | 55.27 | k | 48.20 | h | 44.09 | i | ----- | z |
2012 | 45.66 | l | 45.90 | h | 44.23 | i | 50.50 | i | 51.57 | h | 57.05 | i | 59.50 | i | 60.11 | h | 57.35 | j | 55.09 | h | 51.55 | i | 44.74 | n | ----- | z |
2013 | 44.02 | j | 45.28 | j | 47.06 | m | 50.95 | k | 53.78 | m | 57.97 | m | 59.36 | m | 62.06 | n | 61.38 | n | 52.61 | l | 50.03 | o | 39.62 | o | ----- | z |
2014 | 47.00 | l | 47.19 | l | 49.82 | n | 51.19 | l | 57.15 | n | 57.21 | m | 62.68 | n | 62.34 | o | 61.88 | m | 59.28 | m | 51.50 | o | 48.91 | o | ----- | z |
2015 | 49.81 | o | 51.09 | l | 50.56 | m | 49.47 | l | 54.17 | p | 58.47 | m | 63.33 | m | 62.35 | n | 58.38 | m | 59.12 | n | 49.19 | n | 47.67 | m | ----- | z |
2016 | 48.16 | o | 50.03 | l | 48.21 | l | 53.79 | p | 55.97 | n | 58.03 | l | 61.00 | p | 60.58 | m | 59.81 | n | 56.24 | n | 52.53 | m | 41.75 | o | ----- | z |
2017 | 43.37 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 45.91 | 47.29 | 48.66 | 50.59 | 53.64 | 57.18 | 59.96 | 60.65 | 58.73 | 54.99 | 49.24 | 44.52 | 52.69 | |||||||||||||
S.D. | 2.19 | 3.34 | 2.73 | 2.21 | 2.18 | 1.38 | 1.40 | 1.18 | 1.90 | 1.73 | 2.95 | 2.04 | 0.95 | |||||||||||||
SKEW | -0.32 | -0.17 | -0.41 | -0.14 | -0.17 | -0.10 | -0.22 | -0.07 | 0.49 | -0.01 | -1.21 | -1.19 | -0.25 | |||||||||||||
MAX | 48.89 | 52.60 | 52.63 | 54.53 | 57.11 | 59.65 | 62.47 | 62.52 | 62.03 | 57.60 | 51.72 | 46.79 | 54.62 | |||||||||||||
MIN | 41.82 | 40.56 | 43.72 | 46.16 | 49.13 | 54.73 | 57.05 | 58.85 | 56.17 | 52.00 | 42.60 | 39.45 | 50.59 | |||||||||||||
YRS | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 11 |