YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1980 | ----- | z | ----- | z | 29.71 | g | 35.23 | 46.50 | c | 56.83 | a | 61.32 | f | 58.12 | g | 53.41 | a | 36.33 | a | 28.15 | d | 27.38 | b | 40.55 | e | |
1981 | 25.27 | a | 25.82 | 33.00 | f | 42.69 | d | 48.10 | a | 56.14 | b | 59.76 | b | 57.83 | b | 51.31 | d | 40.86 | c | 30.30 | c | 26.36 | f | 43.81 | b | |
1982 | 24.33 | d | 24.12 | b | 31.23 | e | 39.14 | h | 45.84 | 53.77 | 60.22 | d | 59.38 | g | 52.29 | b | 37.93 | c | 31.35 | d | 24.00 | d | 38.51 | b | ||
1983 | 23.54 | c | 27.85 | a | 33.17 | b | 33.29 | f | 40.64 | c | 50.07 | c | 56.79 | g | 57.71 | j | 54.00 | f | 44.55 | b | 37.52 | i | 21.07 | d | 34.41 | e |
1984 | 23.72 | f | 22.32 | g | 29.50 | c | 33.64 | e | 48.90 | a | 56.46 | d | 58.25 | c | 58.34 | b | 47.26 | g | 39.44 | d | 32.45 | j | 25.38 | j | 46.36 | e |
1985 | 21.74 | d | 23.73 | b | 32.83 | b | 40.53 | 47.97 | 54.97 | 58.48 | b | 58.68 | c | 51.56 | c | 42.86 | b | 33.14 | b | 22.63 | a | 40.76 | ||||
1986 | 24.94 | 28.92 | b | 34.65 | 41.37 | 47.37 | a | 55.32 | b | 58.39 | 60.06 | 51.67 | 41.86 | b | 30.31 | a | 25.43 | a | 41.69 | |||||||
1987 | 22.53 | a | 26.50 | b | 29.00 | 35.00 | 46.10 | b | 52.47 | 56.41 | b | 58.10 | a | 49.47 | 42.43 | c | 28.60 | 23.68 | 39.19 | |||||||
1988 | 23.10 | a | 27.54 | a | 28.42 | 36.77 | 45.61 | c | 54.90 | a | 58.68 | c | 59.80 | a | 48.72 | a | 42.50 | a | 32.92 | d | 22.15 | d | 40.09 | |||
1989 | 23.65 | 26.61 | 33.48 | 40.70 | 48.63 | a | 55.17 | a | 60.23 | e | 59.72 | b | 50.26 | c | 39.17 | b | 30.72 | a | 19.97 | 40.69 | ||||||
1990 | 22.13 | 24.21 | 33.16 | 41.10 | a | 48.77 | a | 60.63 | 60.71 | 56.30 | d | 53.89 | b | 39.10 | a | 32.46 | b | 21.79 | c | 41.19 | ||||||
1991 | 23.64 | c | 29.18 | 33.18 | c | 40.62 | d | 45.74 | 53.81 | c | 59.29 | c | 58.71 | 50.79 | a | 39.20 | a | 30.50 | 25.93 | c | 40.88 | |||||
1992 | 23.68 | 27.83 | 31.83 | a | 39.47 | 47.70 | a | 52.24 | a | 57.83 | a | 57.77 | e | 50.52 | c | 42.69 | b | 27.79 | b | 24.23 | e | 40.30 | ||||
1993 | 28.45 | b | 28.56 | a | 32.30 | a | 39.73 | 46.38 | b | 53.70 | c | 60.97 | b | 58.63 | a | 48.31 | a | 38.93 | b | 27.77 | 23.74 | d | 40.62 | |||
1994 | 23.10 | a | 26.00 | 32.97 | b | 37.76 | a | 48.10 | a | 58.11 | b | 60.67 | a | 60.73 | a | 51.74 | c | 41.77 | a | 34.43 | b | 29.28 | f | 43.22 | a | |
1995 | 29.55 | 35.26 | e | 36.97 | a | 34.64 | p | 49.97 | a | 54.54 | f | 58.47 | a | 61.06 | 52.48 | a | 39.45 | 34.75 | b | 26.57 | a | 42.45 | b | |||
1996 | 23.89 | d | 31.14 | 29.14 | b | 40.52 | a | 53.83 | b | 60.31 | a | 61.16 | 58.24 | b | 50.37 | c | 40.72 | b | 31.62 | a | 25.14 | c | 42.17 | |||
1997 | 24.29 | 25.11 | 31.67 | a | 36.77 | 48.83 | a | 54.20 | 58.66 | b | 59.24 | b | 54.76 | a | 39.76 | b | 27.67 | c | 20.42 | 40.11 | ||||||
1998 | 26.90 | a | 28.22 | a | 30.77 | a | 34.43 | b | 46.47 | a | 55.00 | a | 61.77 | a | 57.70 | a | 53.17 | a | 42.50 | c | 34.61 | b | 24.90 | b | 41.37 | |
1999 | 28.14 | c | 26.96 | a | 32.93 | a | 38.38 | a | 47.90 | 53.86 | a | 60.00 | c | 58.90 | b | 51.74 | c | 38.21 | c | 30.68 | b | 22.77 | 40.87 | |||
2000 | 24.97 | b | 29.89 | a | 32.10 | 41.59 | a | 50.96 | e | 58.07 | 60.62 | b | 57.41 | i | 51.50 | b | 42.46 | c | 27.03 | a | 23.42 | 40.24 | a | |||
2001 | 23.00 | a | 27.32 | 33.37 | a | 40.66 | a | 50.73 | a | 57.81 | c | 62.10 | b | 58.36 | c | 51.79 | f | 43.00 | a | 35.86 | b | 23.45 | b | 41.42 | a | |
2002 | 27.60 | a | 25.52 | c | 28.70 | d | 44.68 | e | 47.74 | d | 58.04 | c | 60.66 | b | 59.83 | g | 53.17 | a | 41.56 | d | 30.79 | b | 27.93 | b | 40.58 | a |
2003 | 27.67 | d | 30.11 | 34.24 | b | 40.04 | b | 48.38 | e | 53.11 | l | 61.42 | g | 56.00 | y | 53.83 | a | 47.00 | c | 33.44 | c | 25.47 | a | 37.80 | c | |
2004 | 27.73 | a | 25.17 | k | 36.76 | f | 41.15 | c | 49.76 | b | 55.69 | a | 59.17 | b | 56.70 | d | 50.47 | 43.38 | b | 32.43 | 25.03 | 44.15 | b | |||
2005 | 29.35 | 32.18 | 32.55 | 38.20 | 48.10 | 53.07 | 59.06 | 58.52 | 52.47 | 43.06 | 30.83 | 24.94 | 41.86 | |||||||||||||
2006 | 26.06 | 27.04 | 36.14 | x | 41.20 | 50.06 | m | 56.83 | a | 61.82 | n | ----- | z | ----- | z | 42.08 | g | 31.70 | 25.79 | b | 34.77 | f | ||||
2007 | 22.55 | 29.00 | 33.96 | f | 35.83 | 46.57 | a | 52.08 | e | 59.17 | s | 59.20 | f | 55.30 | t | ----- | z | ----- | z | ----- | z | 37.21 | g | |||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.42 | 26.42 | k | |
2009 | 27.71 | 29.14 | 36.29 | 40.87 | 51.17 | a | 56.80 | 61.45 | 58.77 | 52.23 | 41.03 | 33.27 | 24.77 | 42.79 | ||||||||||||
2010 | 24.00 | 26.61 | 32.10 | 42.07 | 47.61 | 58.03 | 61.35 | 60.35 | 54.80 | 44.74 | 30.40 | 31.19 | 42.77 | |||||||||||||
2011 | 24.48 | 22.82 | 35.29 | 44.33 | 46.77 | 56.73 | 62.03 | 64.29 | 54.53 | 41.06 | 33.47 | 24.07 | a | 42.49 | ||||||||||||
2012 | 27.68 | 26.72 | 36.03 | 43.87 | 50.97 | 58.50 | 61.29 | 60.81 | 52.30 | 42.19 | 34.80 | 26.39 | 43.46 | |||||||||||||
2013 | 24.19 | 27.29 | 35.87 | 40.43 | 48.37 | a | 61.33 | 61.45 | 60.16 | 55.17 | 40.03 | 32.50 | 24.32 | 42.59 | ||||||||||||
2014 | 25.94 | 30.82 | 34.45 | 40.76 | a | 46.16 | 58.37 | 61.13 | 60.35 | 56.27 | 44.19 | 30.70 | 28.84 | 43.16 | ||||||||||||
2015 | 25.23 | 29.25 | 36.68 | 40.47 | 47.19 | 57.23 | 62.10 | 61.16 | 56.53 | 47.32 | 32.27 | 25.52 | 43.41 | |||||||||||||
2016 | 27.00 | 29.86 | 35.35 | 40.50 | 45.45 | 57.50 | 62.19 | 58.42 | 54.50 | 47.00 | 37.37 | 26.61 | 43.48 | |||||||||||||
2017 | 28.94 | 34.82 | 38.13 | 42.07 | 47.26 | 57.80 | 61.03 | 59.58 | 52.77 | 42.29 | 37.20 | 28.61 | 44.21 | |||||||||||||
2018 | 23.42 | 28.43 | 34.81 | 38.20 | 52.87 | 58.57 | 62.71 | 60.26 | 52.90 | 45.19 | 31.10 | 27.16 | 42.97 | |||||||||||||
2019 | 28.84 | 27.71 | 33.55 | 44.31 | q | 48.39 | 57.03 | ----- | z | 63.58 | l | ----- | z | ----- | z | ----- | z | ----- | z | 39.10 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.38 | 28.00 | 33.14 | 39.76 | 47.99 | 56.15 | 60.25 | 59.25 | 52.42 | 41.83 | 31.80 | 24.91 | 41.80 | |||||||||||||
S.D. | 2.29 | 2.73 | 2.47 | 2.73 | 2.32 | 2.53 | 1.52 | 1.56 | 2.00 | 2.60 | 2.61 | 2.41 | 1.34 | |||||||||||||
SKEW | 0.31 | 0.64 | -0.15 | -0.52 | -0.10 | -0.20 | -0.51 | 0.87 | 0.05 | 0.25 | 0.17 | 0.17 | -0.04 | |||||||||||||
MAX | 29.55 | 35.26 | 38.13 | 44.68 | 53.83 | 61.33 | 62.71 | 64.29 | 56.53 | 47.32 | 37.37 | 31.19 | 44.21 | |||||||||||||
MIN | 21.74 | 22.82 | 28.42 | 33.64 | 40.64 | 50.07 | 56.41 | 56.30 | 48.31 | 36.33 | 27.03 | 19.97 | 39.19 | |||||||||||||
YRS | 37 | 36 | 34 | 35 | 38 | 37 | 33 | 30 | 33 | 36 | 35 | 35 | 24 |