YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1971 | ----- | z | ----- | z | ----- | z | ----- | z | 58.00 | t | 63.13 | 65.10 | 70.17 | b | 70.57 | 61.77 | 54.00 | 46.32 | 61.58 | e | ||||||
1972 | 46.42 | 52.48 | 54.97 | a | 56.00 | b | 62.42 | 67.03 | 71.50 | a | 71.35 | 69.73 | 63.94 | 55.48 | a | 45.80 | a | 59.76 | ||||||||
1973 | 47.43 | c | 57.61 | 54.48 | 61.23 | 63.35 | 67.43 | 68.81 | 68.45 | 70.55 | a | 62.84 | 51.36 | b | 51.58 | 60.43 | ||||||||||
1974 | 47.10 | 51.18 | 55.39 | 58.53 | 61.87 | 65.33 | 70.45 | 70.77 | 73.03 | 67.03 | 56.77 | 50.94 | 60.70 | |||||||||||||
1975 | 50.58 | 51.43 | 54.87 | 55.80 | 64.06 | 66.00 | a | 70.13 | 69.19 | 72.13 | 60.07 | b | 53.60 | 51.37 | a | 59.94 | ||||||||||
1976 | 51.29 | 50.79 | 54.48 | 58.17 | a | 64.19 | 66.30 | c | 71.90 | 69.81 | 73.17 | 66.65 | 59.77 | 52.29 | 61.57 | |||||||||||
1977 | 53.29 | 58.04 | a | 54.84 | 61.50 | 62.13 | 67.70 | 70.65 | 72.10 | 67.83 | 65.81 | 53.90 | 50.81 | 61.55 | ||||||||||||
1978 | 50.58 | 52.36 | 56.94 | 55.47 | 62.13 | 66.73 | 67.84 | 67.90 | 65.93 | 63.50 | a | 49.97 | 44.32 | 58.64 | ||||||||||||
1979 | 43.45 | 47.96 | 54.55 | 56.77 | 61.74 | 65.47 | 69.68 | 69.48 | 70.73 | 62.07 | a | 53.63 | 53.36 | c | 59.07 | |||||||||||
1980 | 48.13 | 54.10 | 52.90 | 58.21 | a | 60.97 | 63.80 | 67.97 | 65.52 | 66.13 | 63.74 | 55.53 | 52.84 | 59.15 | ||||||||||||
1981 | 55.39 | 54.14 | 54.87 | 57.80 | 61.73 | a | 65.63 | 67.16 | 67.03 | 66.57 | 59.63 | a | 53.31 | a | 51.03 | 59.53 | ||||||||||
1982 | 45.81 | 50.36 | 51.74 | 54.73 | 60.71 | 62.45 | a | 66.03 | 66.94 | 67.57 | 63.80 | a | 53.07 | a | 50.71 | 57.83 | ||||||||||
1983 | 53.48 | 54.59 | a | 57.26 | 61.17 | a | 64.23 | a | 66.82 | b | 69.77 | a | 70.90 | 70.45 | a | 63.32 | 54.14 | a | 48.52 | b | 61.22 | |||||
1984 | 52.97 | 55.38 | 57.77 | 57.63 | 62.32 | 63.50 | 67.23 | 70.52 | 69.72 | a | 59.90 | 53.34 | a | 48.06 | 59.86 | |||||||||||
1985 | 52.48 | 51.54 | b | 52.52 | 57.73 | 63.42 | 67.07 | b | 68.55 | 68.23 | 67.79 | a | 61.32 | 48.10 | a | 51.81 | 59.21 | |||||||||
1986 | 54.35 | 53.52 | a | 60.80 | a | 58.00 | a | 62.13 | a | 67.28 | a | 68.29 | c | 66.35 | 64.77 | 61.42 | 55.90 | 51.45 | 60.36 | |||||||
1987 | 51.97 | 55.07 | 57.97 | 62.03 | 64.97 | 66.37 | 66.74 | 68.84 | 67.36 | b | 66.48 | 56.43 | 48.96 | c | 61.10 | |||||||||||
1988 | 49.40 | a | 56.17 | 56.23 | a | 59.13 | 62.83 | a | 65.93 | 69.80 | a | 68.06 | 69.64 | b | 63.97 | 53.53 | 50.94 | 60.47 | ||||||||
1989 | 50.31 | b | 47.82 | 54.04 | c | 64.10 | 64.10 | b | 67.00 | c | 69.65 | 70.75 | c | 71.39 | b | 62.53 | a | 56.34 | a | 52.80 | a | 60.90 | ||||
1990 | 51.45 | b | 52.11 | a | 57.60 | a | 60.62 | a | 62.37 | d | 66.89 | b | 69.45 | b | 70.32 | 70.97 | a | 61.94 | 54.68 | b | 44.71 | c | 60.26 | |||
1991 | 51.16 | 58.50 | d | 55.07 | d | 57.38 | d | 60.62 | g | 64.96 | f | 70.59 | b | 70.48 | b | 76.52 | e | 68.09 | i | 56.50 | h | 51.11 | c | 61.35 | d | |
1992 | 53.20 | f | 59.82 | a | 61.07 | b | 63.69 | d | 68.86 | j | 69.80 | j | 71.93 | a | 73.18 | c | 69.26 | g | 64.93 | b | 54.17 | a | 48.27 | e | 62.13 | d |
1993 | 47.93 | d | 54.35 | b | 58.65 | e | 59.52 | c | 66.00 | 68.04 | d | 70.67 | d | 72.08 | g | 68.41 | a | 63.70 | d | 53.23 | d | 51.59 | d | 60.19 | a | |
1994 | 53.86 | b | 51.25 | 59.41 | b | 60.45 | h | 65.54 | e | 66.92 | e | 70.42 | e | 74.82 | c | 71.67 | f | 62.93 | d | 50.10 | i | 49.42 | g | 63.14 | d | |
1995 | 52.80 | a | 57.00 | b | 57.11 | c | 61.32 | e | 64.72 | m | 66.68 | k | 73.04 | h | 72.86 | q | 71.47 | m | 63.12 | g | 57.00 | e | 55.15 | r | 57.05 | g |
1996 | 50.38 | g | 55.76 | h | 59.88 | g | 58.18 | s | 63.50 | y | 68.86 | i | 71.22 | h | 73.33 | p | 71.18 | h | 62.82 | c | 56.78 | g | 52.16 | f | 62.82 | k |
1997 | 50.83 | g | 54.05 | f | 55.42 | e | 60.00 | e | 69.09 | i | 70.36 | p | 73.55 | k | 74.35 | n | 73.29 | i | 61.82 | c | 57.28 | l | 53.16 | l | 59.08 | i |
1998 | 52.59 | n | 53.55 | f | 57.86 | i | 60.57 | g | 63.29 | n | 67.33 | i | 69.39 | m | 74.91 | t | ----- | z | 63.89 | d | 54.12 | d | 47.83 | h | 59.00 | j |
1999 | 50.38 | g | 52.00 | n | 54.27 | e | 60.14 | p | 63.20 | p | 66.58 | d | 67.45 | b | 71.65 | k | 70.05 | k | 62.88 | f | 57.90 | i | 52.67 | m | 62.76 | i |
2000 | 49.55 | k | 54.21 | j | 54.91 | h | 62.62 | i | 62.61 | c | 69.14 | i | 69.75 | o | 70.06 | o | 71.10 | j | 63.54 | g | 54.00 | q | 52.58 | g | 62.61 | k |
2001 | 52.41 | d | 52.48 | g | 56.14 | c | 56.48 | e | 67.00 | i | 65.70 | j | 68.39 | h | 68.68 | i | 69.44 | l | 60.60 | f | 56.24 | e | 49.65 | e | 54.18 | g |
2002 | 49.17 | h | 54.40 | h | 54.54 | c | 59.23 | d | 62.00 | f | 66.32 | k | 71.04 | h | 70.29 | j | 69.11 | k | 61.04 | f | 58.75 | f | 53.24 | f | 56.88 | j |
2003 | 55.61 | h | 54.30 | e | 57.86 | j | 57.91 | h | 64.23 | e | 68.91 | g | 72.45 | i | 73.00 | j | 70.68 | e | 64.00 | k | 51.92 | f | 50.56 | d | 59.94 | h |
2004 | 51.44 | d | 54.42 | c | 58.83 | h | 65.33 | f | 64.91 | i | 67.71 | m | 74.56 | m | 73.28 | f | 69.60 | j | 61.63 | a | 54.58 | d | 52.20 | f | 55.52 | h |
2005 | 51.71 | g | 56.05 | g | 59.48 | j | 59.32 | h | 65.46 | g | 67.50 | l | 71.39 | h | 65.87 | a | 63.20 | 58.50 | k | 52.32 | b | 49.00 | a | 57.60 | h | |
2006 | 50.26 | 51.04 | 50.48 | d | 57.16 | k | ----- | z | 66.47 | ----- | z | 62.83 | a | 64.33 | 59.33 | a | 52.12 | d | 49.59 | d | 56.27 | c | ||||
2007 | 46.26 | d | 48.64 | c | 53.64 | f | 56.48 | g | 58.85 | e | 62.75 | f | 67.56 | f | 67.70 | h | 64.69 | a | 57.73 | e | 52.25 | b | 52.00 | d | 54.35 | e |
2008 | 44.54 | e | 49.15 | i | 50.00 | c | 52.41 | h | 58.08 | g | 59.81 | c | 64.53 | a | 64.77 | 63.08 | d | 59.03 | 54.97 | 45.10 | 56.20 | c | ||||
2009 | 49.87 | 51.04 | 49.52 | 54.03 | 58.26 | 62.10 | 64.00 | 66.03 | 66.57 | 58.71 | 53.20 | 45.74 | 56.59 | |||||||||||||
2010 | 51.52 | 52.36 | 52.84 | 53.60 | 56.32 | 60.93 | 62.29 | 62.65 | 64.43 | 59.58 | 49.47 | 48.71 | 56.22 | |||||||||||||
2011 | 49.03 | 47.14 | 50.42 | 51.77 | 56.67 | d | 63.33 | 65.97 | 67.10 | 67.20 | 60.55 | 51.33 | 47.42 | 56.49 | ||||||||||||
2012 | 49.47 | a | 49.72 | 49.32 | 55.41 | a | 59.10 | 62.00 | 64.19 | 65.26 | 62.93 | 59.45 | 53.63 | 47.03 | a | 56.46 | ||||||||||
2013 | 46.16 | 48.57 | 52.45 | 56.37 | 61.77 | 64.73 | 64.84 | 66.71 | 65.07 | 58.52 | 53.90 | 45.58 | 57.06 | |||||||||||||
2014 | 52.52 | 50.68 | 55.29 | 59.27 | 64.90 | 63.93 | 67.58 | 67.35 | 70.70 | 64.48 | 55.13 | 51.74 | 60.30 | |||||||||||||
2015 | 54.35 | 56.25 | 57.43 | a | 57.50 | 59.00 | 63.63 | 70.52 | 69.26 | 65.43 | 63.81 | 51.93 | 48.35 | 59.79 | ||||||||||||
2016 | 49.06 | 53.83 | 54.32 | 60.90 | a | 63.58 | 65.90 | 67.13 | 66.84 | 65.03 | 58.71 | 55.13 | 44.42 | 58.74 | ||||||||||||
2017 | 45.55 | 50.14 | 52.59 | b | 55.80 | 60.93 | d | 63.81 | c | 66.52 | 68.68 | 67.97 | 60.94 | 52.63 | 49.00 | 57.88 | ||||||||||
2018 | 51.48 | 48.00 | 51.61 | 57.50 | 60.03 | 64.56 | c | 65.70 | a | 66.39 | 65.23 | 60.74 | 54.73 | 49.52 | 57.96 | |||||||||||
2019 | 50.90 | 44.82 | 53.06 | 59.57 | b | 60.67 | a | 65.59 | a | 69.13 | 70.42 | 65.30 | 57.87 | 51.73 | 48.74 | 58.15 | ||||||||||
2020 | 49.26 | 49.28 | 49.58 | 56.50 | 62.10 | 64.70 | 66.61 | 69.03 | 68.37 | 59.45 | 51.23 | 49.55 | 57.97 | |||||||||||||
2021 | 49.32 | 47.93 | 49.97 | 56.67 | 59.68 | 65.80 | 65.77 | 66.81 | 66.63 | 57.58 | 54.62 | f | 43.55 | b | 57.25 | a | ||||||||||
2022 | 49.73 | a | 48.96 | a | 52.26 | 52.53 | 56.19 | 64.07 | 66.81 | 67.67 | d | 65.00 | 59.10 | 48.64 | b | 46.52 | 56.46 | |||||||||
2023 | 47.27 | a | 46.89 | a | 47.42 | 52.60 | 58.31 | b | 61.50 | 66.71 | 69.42 | 64.30 | 59.61 | 52.23 | 51.19 | 56.45 | ||||||||||
2024 | 49.94 | 50.07 | 51.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.37 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 50.04 | 52.08 | 54.25 | 57.86 | 61.70 | 65.06 | 67.95 | 68.40 | 67.79 | 61.75 | 53.61 | 49.15 | 59.03 | |||||||||||||
S.D. | 2.82 | 3.48 | 3.14 | 2.91 | 2.50 | 2.03 | 2.38 | 2.55 | 3.15 | 2.53 | 2.27 | 2.64 | 1.68 | |||||||||||||
SKEW | -0.33 | 0.22 | 0.05 | 0.00 | -0.53 | -0.70 | -0.24 | 0.01 | 0.52 | 0.23 | -0.13 | -0.47 | -0.28 | |||||||||||||
MAX | 55.39 | 59.82 | 61.07 | 64.10 | 66.00 | 68.04 | 71.93 | 74.82 | 76.52 | 67.03 | 59.77 | 53.36 | 61.57 | |||||||||||||
MIN | 43.45 | 44.82 | 47.42 | 51.77 | 56.19 | 59.81 | 62.29 | 62.65 | 62.93 | 57.58 | 48.10 | 43.55 | 56.22 | |||||||||||||
YRS | 44 | 44 | 46 | 41 | 39 | 40 | 41 | 41 | 42 | 45 | 44 | 44 | 33 |