YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.11 | m | 77.28 | a | 74.74 | 71.37 | 69.10 | 73.12 | h | |||
1979 | 66.84 | 66.71 | 67.81 | 68.60 | 70.87 | 72.77 | 75.06 | 76.90 | 77.13 | 75.81 | 73.47 | 72.00 | 72.00 | |||||||||||||
1980 | 69.19 | 69.07 | 70.65 | 71.73 | 73.16 | 73.53 | 74.84 | 75.77 | 76.60 | 76.33 | a | 74.08 | f | 73.03 | 73.08 | a | ||||||||||
1981 | 72.00 | 71.64 | 71.81 | 72.67 | 73.23 | 77.10 | 77.00 | 75.23 | 76.97 | 75.74 | 72.10 | 69.55 | 73.75 | |||||||||||||
1982 | 66.68 | 66.86 | 67.48 | 69.63 | 71.23 | 73.43 | ----- | z | 75.30 | a | 75.48 | a | 73.58 | 71.17 | 68.17 | a | 70.82 | a | ||||||||
1983 | 67.60 | a | 67.48 | a | 69.00 | 69.70 | 70.58 | 73.73 | 74.29 | 74.39 | 74.17 | a | 73.77 | 72.72 | a | 71.00 | 71.54 | |||||||||
1984 | 69.87 | 69.00 | 71.63 | a | 72.23 | 73.03 | a | 74.10 | 76.23 | 76.73 | a | 76.00 | 76.65 | 74.18 | b | 70.29 | 73.33 | |||||||||
1985 | 67.83 | a | 68.18 | 69.16 | 71.07 | 71.23 | 74.13 | 75.74 | 77.45 | b | 75.87 | 73.97 | b | 71.90 | 70.37 | a | 72.24 | |||||||||
1986 | 70.41 | b | 69.46 | 72.00 | 71.90 | 72.74 | 75.31 | a | 75.84 | 77.16 | 77.50 | 76.10 | a | 74.50 | 70.03 | 73.58 | ||||||||||
1987 | 68.97 | a | 66.82 | 68.53 | a | 68.73 | 68.23 | a | 73.37 | 74.97 | 76.23 | 76.66 | a | 74.30 | a | 73.03 | 71.65 | 71.79 | ||||||||
1988 | 68.93 | b | 70.24 | 70.48 | b | 70.93 | b | 72.81 | 74.77 | 75.65 | 75.48 | 75.60 | 74.42 | 72.60 | 69.67 | a | 72.63 | |||||||||
1989 | 68.84 | 68.57 | 69.16 | 69.80 | 71.39 | 72.97 | 74.39 | 74.45 | 74.03 | 73.19 | 71.27 | 67.68 | 71.31 | |||||||||||||
1990 | 68.06 | 66.75 | 67.19 | 70.33 | 72.35 | 73.07 | 74.00 | 76.26 | 76.00 | 74.87 | 71.77 | 68.84 | 71.62 | |||||||||||||
1991 | 68.67 | j | 69.26 | i | 67.55 | 70.50 | 71.68 | 72.90 | 74.84 | 76.00 | a | 75.67 | 75.19 | 73.83 | 69.42 | 72.76 | b | |||||||||
1992 | 68.16 | 67.62 | 68.48 | 70.93 | 72.77 | 74.43 | 74.10 | 75.42 | 75.33 | 74.39 | 72.50 | 70.32 | 72.04 | |||||||||||||
1993 | 64.65 | 66.50 | 68.61 | 70.90 | 72.16 | 73.63 | 75.00 | 76.58 | 75.17 | a | 74.26 | 72.33 | 69.42 | 71.60 | ||||||||||||
1994 | 68.39 | 68.68 | 69.81 | 70.60 | 72.00 | b | 73.19 | c | 75.24 | b | 76.47 | a | 76.07 | 74.13 | a | 72.26 | c | 68.96 | c | 72.15 | ||||||
1995 | 67.43 | c | 67.79 | 68.97 | a | 71.47 | 71.84 | 73.87 | 75.48 | 77.10 | a | 76.10 | 74.58 | 73.37 | 72.55 | b | 72.54 | |||||||||
1996 | 69.90 | 67.97 | 67.38 | b | 72.04 | b | 71.55 | 74.93 | 76.35 | 77.74 | 74.67 | 75.87 | 71.40 | 69.16 | 72.41 | |||||||||||
1997 | 71.16 | 69.22 | a | 69.48 | 70.93 | 71.48 | 73.90 | 75.80 | a | 77.39 | 75.43 | 75.13 | a | 72.48 | a | 69.52 | 72.66 | |||||||||
1998 | 68.39 | 69.37 | a | 69.90 | 69.97 | 69.94 | 71.47 | 75.48 | 76.52 | 75.37 | 74.26 | 71.50 | 69.46 | c | 71.80 | |||||||||||
1999 | 68.47 | a | 68.48 | a | 69.94 | 70.47 | 70.97 | 73.23 | 75.13 | 74.90 | 74.50 | 73.45 | 71.23 | 69.03 | 71.65 | |||||||||||
2000 | 67.52 | 69.62 | 70.61 | 70.93 | a | 72.90 | 75.17 | 75.61 | 76.68 | 75.33 | 74.77 | 71.53 | 70.32 | 72.58 | ||||||||||||
2001 | 70.61 | 69.38 | d | 70.03 | 71.17 | 71.32 | 73.63 | 75.26 | 77.26 | 76.00 | 75.42 | 72.47 | 70.16 | 72.73 | ||||||||||||
2002 | 68.10 | 68.07 | 69.19 | 70.41 | a | 71.26 | 73.77 | 75.52 | 75.81 | 74.80 | 74.81 | 72.13 | 70.97 | 72.07 | ||||||||||||
2003 | 68.13 | 68.61 | 71.52 | 71.37 | 74.13 | 74.17 | 76.13 | 76.97 | 76.13 | 75.32 | 73.43 | 69.74 | 72.97 | |||||||||||||
2004 | 68.97 | 70.24 | 69.19 | 70.40 | 72.16 | 74.57 | 75.61 | 77.48 | 77.30 | 76.13 | a | 72.00 | 70.61 | 72.89 | ||||||||||||
2005 | 69.26 | 68.75 | 68.58 | 70.80 | 73.13 | 74.10 | 75.52 | 76.48 | 76.97 | 74.06 | 71.93 | 70.29 | 72.49 | |||||||||||||
2006 | 70.45 | 67.75 | 69.03 | 69.63 | 69.84 | 73.50 | 75.58 | 75.97 | 74.87 | 73.80 | a | 72.07 | 69.74 | 71.85 | ||||||||||||
2007 | 68.74 | 67.89 | 69.52 | 70.37 | 72.06 | 73.90 | 75.26 | 74.90 | 74.47 | 75.13 | 72.00 | 69.00 | b | 71.94 | ||||||||||||
2008 | 66.71 | 67.34 | 69.06 | 70.20 | 70.65 | 73.60 | 75.10 | 74.52 | 73.40 | 73.10 | 70.83 | 68.77 | 71.11 | |||||||||||||
2009 | 66.97 | 66.96 | 66.68 | 68.17 | 70.19 | 73.90 | 74.48 | 76.19 | 75.60 | 75.10 | 72.50 | 70.10 | 71.40 | |||||||||||||
2010 | 69.19 | 68.00 | 69.03 | 69.70 | 71.55 | 73.33 | 74.26 | 74.35 | 74.33 | 74.00 | 72.07 | 69.97 | 71.65 | |||||||||||||
2011 | 67.77 | 68.14 | 69.74 | 69.70 | 71.45 | 72.10 | 73.58 | 74.68 | 74.23 | 72.87 | 70.93 | 69.35 | 71.21 | |||||||||||||
2012 | 69.81 | 68.29 | a | 68.77 | 69.53 | 71.35 | 71.53 | 72.65 | 74.48 | 72.17 | 73.19 | 71.83 | 70.45 | 71.17 | ||||||||||||
2013 | 68.58 | 68.75 | 67.71 | 69.93 | a | 71.10 | 72.66 | a | 74.42 | 74.94 | 75.70 | 73.23 | 71.81 | d | 70.14 | b | 71.58 | |||||||||
2014 | 67.35 | 69.29 | 68.84 | 70.63 | 71.10 | 73.72 | a | 75.23 | 76.42 | 75.69 | d | 74.26 | 71.93 | 70.17 | a | 72.05 | ||||||||||
2015 | 67.28 | b | 68.79 | 67.97 | 72.13 | 70.07 | b | 73.10 | 75.52 | 76.97 | 76.00 | a | 75.32 | 74.14 | a | 70.61 | 72.32 | |||||||||
2016 | 69.52 | 69.10 | 69.10 | 71.57 | 71.50 | a | 73.52 | a | 75.13 | a | 75.93 | a | 75.10 | 74.77 | 72.72 | a | 68.80 | a | 72.23 | |||||||
2017 | 67.87 | 68.16 | c | 70.00 | 70.60 | 71.77 | 72.93 | 75.19 | 75.87 | 75.70 | 73.57 | a | 70.86 | b | 68.10 | 71.72 | ||||||||||
2018 | 69.42 | 68.07 | 68.16 | 69.73 | 71.35 | 73.70 | 75.13 | 75.32 | 75.62 | a | 74.17 | a | 72.47 | 70.94 | 72.01 | |||||||||||
2019 | 68.74 | 66.50 | 67.39 | 71.39 | b | 71.63 | a | 74.31 | a | 76.35 | 76.29 | 77.17 | a | 75.55 | 74.38 | a | 71.74 | 72.62 | ||||||||
2020 | 70.20 | a | 68.52 | 69.13 | 70.03 | a | 72.61 | 73.63 | 75.03 | 75.97 | a | 75.90 | 74.71 | 73.34 | a | 72.11 | c | 72.60 | ||||||||
2021 | 70.78 | m | 68.22 | j | 68.63 | l | 70.67 | i | 71.70 | k | 74.57 | i | 75.30 | k | 76.10 | k | 75.40 | j | 74.79 | l | 73.18 | m | 68.79 | l | ----- | z |
2022 | 69.67 | m | 69.72 | j | 70.33 | j | 71.40 | j | 71.14 | j | 74.33 | i | 76.20 | k | 76.14 | j | 76.00 | i | 75.86 | j | 74.39 | l | 70.63 | l | ----- | z |
2023 | 69.35 | k | 69.26 | i | 69.23 | i | 70.74 | k | 71.09 | i | 72.95 | i | 76.10 | k | 77.27 | i | 75.79 | k | 75.64 | i | 74.37 | k | 71.42 | l | ----- | z |
2024 | 70.95 | k | 66.55 | i | 68.83 | m | 71.83 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 68.61 | 68.36 | 69.15 | 70.56 | 71.63 | 73.68 | 75.17 | 76.02 | 75.58 | 74.61 | 72.34 | 70.03 | 72.15 | |||||||||||||
S.D. | 1.39 | 1.11 | 1.27 | 0.99 | 1.10 | 0.98 | 0.80 | 0.97 | 1.11 | 0.95 | 0.97 | 1.17 | 0.64 | |||||||||||||
SKEW | -0.08 | 0.43 | 0.37 | -0.13 | -0.40 | 0.63 | -0.63 | -0.17 | -0.58 | 0.16 | 0.59 | 0.51 | 0.54 | |||||||||||||
MAX | 72.00 | 71.64 | 72.00 | 72.67 | 74.13 | 77.10 | 77.00 | 77.74 | 77.50 | 76.65 | 74.50 | 73.03 | 73.75 | |||||||||||||
MIN | 64.65 | 66.50 | 66.68 | 68.17 | 68.23 | 71.47 | 72.65 | 74.35 | 72.17 | 72.87 | 70.83 | 67.68 | 71.11 | |||||||||||||
YRS | 41 | 41 | 42 | 42 | 42 | 42 | 41 | 42 | 43 | 43 | 42 | 43 | 39 |