YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | 40.29 | 36.47 | 41.82 | 52.52 | 58.74 | 57.40 | 49.02 | a | 49.47 | 35.42 | 29.00 | 45.01 | b | |||||||||
1979 | 30.00 | 31.54 | 37.98 | b | 38.13 | 46.03 | 52.63 | 56.82 | 55.89 | 55.30 | 48.92 | a | 39.82 | 38.05 | 44.26 | |||||||||||
1980 | 30.47 | 37.76 | 33.71 | 40.93 | 43.82 | 45.33 | 56.06 | 56.26 | 51.85 | 49.02 | 40.25 | 40.55 | a | 43.83 | ||||||||||||
1981 | 41.40 | 36.78 | a | 36.45 | 38.40 | 42.73 | 47.02 | 55.55 | 61.11 | 53.53 | 45.13 | 39.15 | 34.28 | a | 44.29 | |||||||||||
1982 | 30.82 | a | 31.26 | a | 33.65 | a | 35.09 | a | 43.30 | d | 54.24 | c | 54.95 | b | 57.82 | a | 51.90 | a | 45.73 | 35.38 | a | 33.53 | a | 42.30 | ||
1983 | 37.85 | 35.91 | 37.00 | a | 39.30 | 48.62 | b | 46.50 | b | 51.81 | 56.76 | 49.39 | b | 46.35 | a | 36.36 | a | 27.90 | 42.81 | |||||||
1984 | 38.03 | 35.26 | b | 37.82 | a | 35.55 | 40.97 | a | 47.43 | b | 57.53 | a | 56.60 | a | 50.40 | d | 40.76 | 35.98 | b | 30.10 | a | 42.20 | ||||
1985 | 38.40 | a | 31.44 | a | 33.92 | a | 40.75 | 44.53 | 52.18 | b | 63.53 | a | 57.02 | a | 48.78 | a | 43.65 | a | 29.05 | 38.10 | e | 43.45 | ||||
1986 | 37.88 | c | 34.89 | a | 40.87 | a | 36.07 | b | 44.16 | 54.34 | b | 52.00 | a | 64.06 | 48.22 | a | 51.11 | 40.15 | c | 37.19 | 45.08 | |||||
1987 | 33.32 | 36.54 | 36.53 | b | 44.02 | d | 47.93 | a | 54.34 | b | 53.46 | e | 59.14 | c | 57.42 | d | 55.16 | b | 40.84 | a | 32.95 | c | 45.97 | |||
1988 | 33.48 | f | 38.57 | b | 35.90 | 39.27 | 42.12 | a | 48.57 | a | 58.30 | c | 56.12 | a | 53.76 | a | 53.55 | a | 36.72 | a | 36.50 | 45.40 | a | |||
1989 | 32.43 | b | 25.20 | a | 32.58 | 44.93 | a | 44.29 | 52.55 | a | 51.72 | a | 54.18 | 56.48 | 45.03 | 42.21 | a | 41.24 | 43.57 | |||||||
1990 | 36.58 | a | 31.59 | a | 38.10 | 43.97 | a | 41.25 | a | 48.37 | 59.77 | 58.58 | 57.14 | a | 43.00 | b | 37.57 | 27.87 | a | 43.65 | ||||||
1991 | ----- | z | 42.78 | a | 32.42 | 37.55 | a | 40.56 | 46.14 | b | 58.37 | 59.14 | b | 57.95 | 49.23 | a | 39.72 | 37.60 | 45.59 | a | ||||||
1992 | 37.19 | 42.14 | 43.92 | a | 42.03 | 52.72 | a | 54.73 | 57.63 | 61.67 | a | 52.91 | b | 47.45 | 39.31 | a | 30.73 | 46.87 | ||||||||
1993 | 29.03 | b | 32.00 | 39.08 | 36.93 | a | 47.27 | 47.63 | 49.23 | a | 56.42 | a | 57.55 | a | 50.92 | 36.67 | 36.44 | 43.26 | ||||||||
1994 | 39.65 | 33.57 | 38.97 | 40.86 | a | 46.66 | 47.77 | 60.17 | a | 55.63 | a | 56.64 | b | 44.24 | 31.18 | 31.88 | b | 43.94 | ||||||||
1995 | 36.16 | 39.80 | 34.97 | 37.50 | 48.30 | c | 51.88 | d | 58.47 | 55.13 | 57.38 | 45.92 | a | 43.50 | b | 38.62 | a | 45.64 | ||||||||
1996 | 35.39 | 38.79 | 38.58 | a | 41.16 | a | 42.34 | 49.98 | 62.00 | 59.10 | 51.52 | 45.15 | a | 40.47 | a | 34.69 | 44.93 | |||||||||
1997 | 34.60 | a | 35.50 | 35.66 | b | 38.21 | a | 50.32 | a | 49.37 | 57.03 | 60.50 | 57.21 | b | 46.72 | a | 42.69 | a | 38.35 | 45.51 | ||||||
1998 | 36.53 | 34.96 | 38.42 | 41.58 | 44.05 | a | 52.23 | 60.85 | a | 60.26 | 58.27 | 45.79 | 36.62 | a | 31.81 | 45.11 | ||||||||||
1999 | 35.24 | 30.95 | 31.55 | 36.62 | 40.48 | a | 47.73 | 55.56 | 58.08 | 55.62 | 48.08 | 40.42 | 41.48 | 43.48 | ||||||||||||
2000 | 33.85 | 38.86 | 37.85 | 46.34 | b | 45.98 | 53.17 | 55.85 | a | 58.83 | m | 55.03 | l | 45.22 | m | 37.19 | l | 39.22 | m | 44.56 | e | |||||
2001 | 36.02 | b | 33.58 | c | 38.02 | g | 36.56 | f | 49.62 | g | 49.32 | e | 58.12 | g | 59.16 | c | 56.88 | 46.53 | 39.83 | 33.58 | 44.36 | d | ||||
2002 | 31.89 | c | 34.21 | g | 32.80 | f | 39.57 | c | 42.65 | d | 54.17 | f | 60.64 | j | 59.87 | h | 57.14 | a | 47.69 | 44.65 | c | 35.36 | m | 43.93 | f | |
2003 | 43.23 | 36.00 | c | 36.65 | e | 35.15 | d | 45.59 | d | 57.09 | h | 61.37 | e | 60.66 | c | 57.48 | d | 49.28 | a | 34.00 | 36.25 | k | 45.94 | b | ||
2004 | 35.84 | b | 35.28 | b | 40.55 | a | 43.30 | b | 46.82 | n | 52.39 | b | 61.63 | 61.67 | a | 52.27 | 48.69 | 40.97 | a | 37.83 | e | 46.40 | a | |||
2005 | 36.17 | g | 39.24 | c | 39.77 | a | 39.16 | a | 46.92 | 49.40 | f | 58.62 | f | 62.26 | d | 53.91 | b | 45.53 | a | 38.50 | f | 36.95 | b | 45.47 | d | |
2006 | 35.98 | c | 35.18 | f | 30.71 | c | 39.35 | d | 47.45 | c | 53.11 | g | 61.85 | n | 60.25 | e | 58.23 | b | 46.89 | c | 36.95 | h | 36.19 | e | 44.38 | d |
2007 | 33.98 | h | 36.00 | e | 39.28 | b | 38.21 | a | 46.64 | c | 50.40 | i | 57.58 | m | 57.31 | b | 55.22 | l | 44.93 | p | 39.53 | a | 30.07 | d | 41.01 | e |
2008 | 29.00 | x | ----- | z | 33.79 | s | 31.92 | r | 43.19 | r | 45.92 | r | 60.48 | k | 58.18 | c | 57.18 | 46.90 | 42.85 | 31.81 | 47.38 | g | ||||
2009 | 40.68 | 35.50 | 31.44 | 38.33 | 47.76 | 52.77 | 64.15 | 59.52 | 57.28 | 44.34 | 37.07 | 32.63 | a | 45.12 | ||||||||||||
2010 | 37.97 | 37.27 | 36.24 | 36.20 | 40.98 | 47.41 | b | 60.02 | 60.26 | 52.22 | 46.77 | 35.88 | 33.19 | 43.70 | ||||||||||||
2011 | 36.68 | 30.93 | 32.37 | 33.38 | 39.71 | 47.88 | 54.48 | 60.26 | 59.97 | 45.00 | 35.53 | 36.90 | 42.76 | |||||||||||||
2012 | 34.92 | 33.72 | 31.73 | 39.45 | 44.60 | 47.22 | 57.63 | 62.18 | 58.83 | 46.84 | 39.13 | 31.23 | 43.96 | |||||||||||||
2013 | 35.39 | 33.48 | 36.76 | 40.62 | 47.29 | 52.25 | 62.65 | 59.77 | 54.75 | 49.21 | g | 41.72 | 34.84 | 45.41 | a | |||||||||||
2014 | 44.11 | 33.32 | 39.40 | 40.72 | 49.05 | a | 51.68 | 63.98 | 64.65 | 59.28 | 50.50 | 38.84 | a | 36.32 | 47.66 | |||||||||||
2015 | 42.97 | 41.20 | 43.02 | 39.77 | 49.76 | 60.05 | 63.15 | 62.05 | 52.38 | 51.84 | 37.25 | 33.19 | 48.05 | |||||||||||||
2016 | 34.45 | 38.88 | 36.40 | 46.92 | 48.55 | 54.12 | 56.24 | 62.15 | 52.90 | 43.63 | 40.75 | 29.18 | 45.35 | |||||||||||||
2017 | 30.58 | 32.23 | 34.42 | 36.25 | 48.24 | ----- | z | 61.44 | g | 66.86 | c | ----- | z | ----- | z | ----- | z | ----- | z | 41.43 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.05 | 35.35 | 36.62 | 39.42 | 45.28 | 50.66 | 57.90 | 59.32 | 54.84 | 47.24 | 38.54 | 34.52 | 44.49 | |||||||||||||
S.D. | 3.79 | 3.67 | 3.29 | 3.17 | 3.22 | 3.31 | 3.84 | 2.81 | 3.27 | 3.02 | 3.31 | 3.72 | 1.52 | |||||||||||||
SKEW | 0.21 | -0.17 | 0.05 | 0.51 | 0.10 | 0.48 | -0.23 | 0.45 | -0.45 | 0.50 | -0.68 | -0.02 | 0.68 | |||||||||||||
MAX | 44.11 | 42.78 | 43.92 | 46.92 | 52.72 | 60.05 | 64.15 | 66.86 | 59.97 | 55.16 | 44.65 | 41.48 | 48.05 | |||||||||||||
MIN | 29.03 | 25.20 | 30.71 | 33.38 | 39.71 | 45.33 | 49.23 | 54.18 | 48.22 | 40.76 | 29.05 | 27.87 | 42.20 | |||||||||||||
YRS | 34 | 36 | 37 | 38 | 37 | 33 | 33 | 38 | 37 | 36 | 36 | 36 | 26 |