YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | 53.23 | 56.34 | 56.57 | 65.65 | 68.82 | 72.82 | a | 70.55 | 71.47 | 61.29 | 56.27 | 46.77 | 61.80 | a | ||||||||||
1971 | 46.61 | 49.95 | 53.21 | 55.62 | 60.58 | 67.70 | 72.00 | 73.53 | 70.72 | a | 60.08 | 52.57 | 44.53 | 58.93 | ||||||||||||
1972 | 42.94 | 52.66 | 59.16 | 58.77 | 65.15 | 69.77 | 72.87 | 72.08 | 66.62 | 62.37 | 51.88 | 43.74 | 59.83 | |||||||||||||
1973 | 47.10 | 52.50 | 52.85 | 60.78 | 66.66 | 73.12 | 72.23 | 70.10 | a | 68.87 | 63.27 | 54.18 | 49.56 | 60.94 | ||||||||||||
1974 | 48.76 | 49.64 | 55.24 | 57.29 | a | 63.58 | 70.35 | 73.21 | 71.66 | 69.77 | 64.31 | 53.07 | 47.98 | 60.41 | ||||||||||||
1975 | 45.87 | 51.48 | 53.97 | a | 53.58 | 64.89 | 68.13 | 70.12 | a | 70.81 | 68.79 | a | 60.69 | e | 52.57 | 49.08 | a | 59.17 | ||||||||
1976 | 48.10 | a | 51.57 | a | 54.15 | 57.07 | b | 64.37 | 66.88 | e | 74.20 | u | 70.78 | a | 69.55 | 64.71 | b | 56.95 | a | 46.58 | 59.16 | a | ||||
1977 | 44.00 | 52.79 | b | 52.82 | f | 62.23 | 60.94 | 70.04 | b | 72.21 | 71.77 | 66.63 | c | 62.19 | 54.48 | a | 49.73 | c | 60.64 | a | ||||||
1978 | 50.40 | 52.11 | a | 57.64 | b | 57.02 | 66.29 | 67.98 | b | 71.37 | 72.12 | b | 70.52 | 65.32 | 51.83 | 42.85 | 60.46 | |||||||||
1979 | 45.87 | 49.57 | 55.27 | 57.95 | b | 65.52 | b | 70.43 | b | 72.47 | 72.79 | 74.45 | 65.13 | 52.98 | 48.89 | 60.94 | ||||||||||
1980 | 48.97 | a | 53.62 | 55.53 | a | 60.20 | 62.79 | 68.05 | 72.55 | 70.24 | 69.63 | 64.82 | 56.47 | 48.19 | 60.92 | |||||||||||
1981 | 48.82 | 53.96 | 54.77 | a | 62.57 | 66.66 | 77.13 | 72.81 | 72.05 | 69.98 | 60.94 | 56.82 | 51.39 | 62.32 | ||||||||||||
1982 | 43.69 | b | 51.77 | 53.77 | c | 58.43 | c | 65.04 | c | 65.57 | a | 71.78 | b | 71.85 | a | 69.85 | 64.07 | a | 50.38 | a | 48.05 | a | 59.52 | |||
1983 | 45.32 | c | 52.66 | 55.57 | c | 57.93 | a | 63.97 | 70.02 | 72.26 | 72.34 | 71.55 | a | 63.53 | 52.07 | c | 49.27 | a | 60.54 | |||||||
1984 | 45.13 | 49.02 | 56.18 | 57.43 | 66.19 | 67.30 | 74.50 | a | 74.95 | 74.87 | 61.27 | 52.23 | b | 44.35 | 60.29 | |||||||||||
1985 | 42.18 | 51.22 | a | 51.35 | 62.05 | b | 62.45 | a | 73.28 | a | 73.26 | 69.98 | 65.23 | 59.85 | 49.70 | b | 42.50 | 58.59 | ||||||||
1986 | 50.66 | 54.93 | a | 58.34 | 59.98 | 64.98 | a | 69.18 | b | 70.52 | b | 69.90 | 64.40 | 61.55 | 55.48 | a | 45.74 | 60.47 | ||||||||
1987 | 46.03 | 51.59 | a | 55.16 | 62.80 | b | 67.79 | 69.74 | a | 68.79 | 69.42 | 66.98 | 62.65 | 52.05 | a | 47.35 | a | 60.03 | ||||||||
1988 | 47.70 | d | 52.97 | 58.48 | b | 59.93 | 62.89 | 70.66 | a | 75.02 | 71.68 | a | 69.26 | a | 63.37 | 54.87 | 48.68 | c | 61.29 | |||||||
1989 | 45.40 | 47.34 | 55.62 | b | 62.70 | 64.82 | 69.28 | a | 73.52 | 69.42 | 66.77 | 61.60 | 54.08 | 45.17 | b | 59.64 | ||||||||||
1990 | 47.10 | 47.71 | 54.89 | 61.47 | 63.23 | 69.30 | 71.21 | 72.24 | 70.68 | 63.87 | a | 53.05 | 42.00 | 59.73 | ||||||||||||
1991 | 46.21 | 53.45 | 50.60 | a | 56.98 | 61.92 | 66.67 | 70.58 | 69.08 | 68.23 | 66.60 | 56.03 | a | 47.27 | 59.47 | |||||||||||
1992 | 44.23 | a | 53.71 | 56.26 | 62.27 | 68.21 | 67.97 | 71.21 | 73.42 | 69.87 | 65.63 | 54.97 | 45.45 | 61.10 | ||||||||||||
1993 | 45.40 | 49.36 | 56.89 | 58.55 | 63.79 | 72.73 | b | 72.08 | 71.65 | a | 68.62 | 64.37 | 53.08 | 45.94 | 60.20 | |||||||||||
1994 | 48.11 | 49.21 | 56.84 | 59.91 | a | 63.40 | 69.25 | 69.56 | 72.06 | 69.17 | 62.13 | 48.47 | 45.17 | a | 59.44 | |||||||||||
1995 | 51.80 | a | 52.94 | a | 53.61 | 57.78 | 61.45 | 67.55 | a | 72.40 | 72.18 | 70.17 | 64.48 | 59.10 | 52.52 | a | 61.33 | |||||||||
1996 | 49.23 | a | 52.80 | a | 56.08 | a | 60.34 | a | 66.02 | 71.10 | 74.97 | 73.02 | 68.58 | 63.60 | a | 55.91 | a | 51.55 | 61.93 | |||||||
1997 | 48.86 | b | 53.29 | 57.78 | a | 62.52 | 70.97 | 70.76 | a | 73.19 | 72.55 | 73.08 | 63.06 | 56.53 | a | 47.77 | a | 62.53 | ||||||||
1998 | 50.03 | b | 50.76 | a | 54.97 | 57.18 | 59.02 | 66.33 | 72.15 | 74.13 | 69.68 | 61.87 | 54.00 | 44.73 | c | 59.57 | ||||||||||
1999 | 46.28 | b | 49.12 | b | 51.60 | 57.67 | 61.22 | a | 67.18 | 68.66 | 70.00 | 68.62 | 64.60 | 56.37 | 48.87 | 59.18 | ||||||||||
2000 | 50.78 | a | 52.28 | 55.52 | a | 60.48 | 64.65 | 69.25 | 69.42 | 71.43 | a | 70.42 | 61.31 | 50.25 | 48.90 | 60.39 | ||||||||||
2001 | 46.48 | 49.59 | a | 58.18 | 56.75 | 70.35 | 72.27 | 69.92 | 71.00 | a | 67.77 | 63.85 | 55.63 | 49.00 | 60.90 | |||||||||||
2002 | 46.16 | 51.32 | 53.44 | 58.12 | 63.00 | 70.10 | a | 71.68 | 70.26 | 70.16 | a | 61.97 | a | 55.50 | 50.71 | 60.20 | ||||||||||
2003 | 51.02 | a | 51.12 | 56.87 | 55.25 | 63.29 | 69.69 | a | 74.29 | 71.97 | 70.60 | 65.15 | 51.53 | 48.78 | b | 60.80 | ||||||||||
2004 | 47.48 | 50.50 | 60.26 | 61.12 | a | 64.85 | 69.59 | a | 70.79 | 71.60 | a | 70.13 | 60.08 | a | 51.15 | 46.47 | 60.34 | |||||||||
2005 | 44.29 | c | 50.85 | a | 55.32 | a | 55.88 | 62.23 | 65.63 | 72.02 | 69.24 | 63.47 | 59.81 | 53.00 | 49.93 | c | 58.47 | |||||||||
2006 | 49.47 | a | 51.92 | d | 52.21 | c | 57.52 | b | 64.23 | a | 69.92 | 74.94 | 68.97 | 65.48 | 59.70 | a | 52.67 | 45.02 | b | 59.34 | ||||||
2007 | 43.97 | 50.17 | b | 56.66 | b | 58.90 | 64.65 | 69.73 | 72.28 | a | 71.92 | 65.83 | 59.95 | 55.00 | 46.45 | 59.63 | ||||||||||
2008 | 46.38 | b | 50.21 | 54.23 | 57.78 | 64.47 | 69.93 | 70.95 | 71.03 | b | 67.48 | 60.73 | 53.47 | 42.11 | 59.06 | |||||||||||
2009 | 45.72 | a | 47.59 | 52.03 | 56.02 | 62.60 | 65.03 | 67.60 | 69.20 | c | 71.33 | 60.73 | 52.85 | 44.90 | a | 57.97 | ||||||||||
2010 | 47.35 | 51.31 | a | 53.05 | 54.67 | 59.58 | 69.40 | 68.42 | 67.05 | 67.97 | 60.78 | a | 51.47 | 48.32 | 58.28 | |||||||||||
2011 | 44.40 | a | 46.71 | 51.50 | b | 57.02 | b | 60.31 | 65.48 | 69.39 | 68.11 | 67.53 | 60.05 | 49.20 | 44.47 | 57.01 | ||||||||||
2012 | 46.29 | 49.38 | 52.77 | 59.33 | 65.32 | 69.10 | a | 70.89 | 70.61 | 66.13 | 61.98 | 54.70 | o | 47.37 | 59.93 | a | ||||||||||
2013 | 44.53 | 49.46 | 55.24 | 61.62 | 66.10 | 70.25 | 70.71 | 69.53 | 66.82 | 57.82 | 52.52 | 42.58 | 58.93 | |||||||||||||
2014 | 49.02 | 52.00 | 55.97 | 58.38 | 65.23 | 66.80 | 68.48 | a | 67.32 | 66.03 | 61.11 | 51.98 | 48.81 | 59.26 | ||||||||||||
2015 | 48.70 | a | 54.89 | 57.82 | 59.40 | 61.32 | 69.97 | 72.27 | 70.50 | 70.64 | a | 65.58 | 50.53 | 46.11 | 60.65 | |||||||||||
2016 | 47.98 | 53.05 | 54.74 | 59.18 | 63.68 | 69.24 | a | 69.97 | 67.31 | 66.42 | 59.90 | 53.37 | 44.15 | 59.08 | ||||||||||||
2017 | 44.82 | 49.91 | 53.81 | 56.58 | 63.24 | 68.32 | 71.68 | 69.95 | 69.43 | 60.89 | 52.63 | 45.87 | 58.93 | |||||||||||||
2018 | 46.98 | 49.67 | a | 49.71 | 56.57 | 61.45 | 68.17 | 71.06 | 68.68 | 63.97 | 61.61 | ----- | z | 46.38 | a | 58.57 | a | |||||||||
2019 | 47.03 | 45.91 | 54.27 | 62.30 | 61.68 | 71.23 | 73.15 | 73.60 | ----- | z | ----- | z | ----- | z | ----- | z | 61.15 | d | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 46.93 | 51.10 | 55.01 | 58.77 | 64.05 | 69.23 | 71.64 | 70.95 | 68.78 | 62.37 | 53.43 | 46.90 | 59.95 | |||||||||||||
S.D. | 2.26 | 2.08 | 2.28 | 2.35 | 2.47 | 2.22 | 1.78 | 1.77 | 2.46 | 2.02 | 2.29 | 2.58 | 1.13 | |||||||||||||
SKEW | 0.15 | -0.38 | -0.08 | 0.12 | 0.45 | 0.75 | -0.17 | -0.18 | 0.06 | 0.12 | 0.11 | -0.02 | -0.01 | |||||||||||||
MAX | 51.80 | 54.93 | 60.26 | 62.80 | 70.97 | 77.13 | 75.02 | 74.95 | 74.87 | 66.60 | 59.10 | 52.52 | 62.53 | |||||||||||||
MIN | 42.18 | 45.91 | 49.71 | 53.58 | 59.02 | 65.03 | 67.60 | 67.05 | 63.47 | 57.82 | 48.47 | 42.00 | 57.01 | |||||||||||||
YRS | 49 | 50 | 49 | 50 | 50 | 50 | 49 | 50 | 49 | 49 | 47 | 49 | 44 |