YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1972 | 48.43 | a | 41.19 | c | 47.35 | 55.66 | a | 61.41 | b | 68.04 | b | 69.37 | a | 71.23 | a | 68.89 | c | 56.67 | a | 49.13 | 46.58 | 57.00 | ||||
1973 | 41.63 | d | 38.14 | 54.60 | a | 54.41 | a | 59.93 | d | 68.67 | 72.37 | a | 70.17 | a | 70.40 | 57.37 | a | 52.77 | 37.90 | a | 56.53 | |||||
1974 | 56.87 | 40.75 | 51.61 | 52.63 | 64.00 | 66.33 | 70.45 | 70.42 | 69.13 | 51.48 | b | 44.48 | a | 40.07 | a | 56.52 | ||||||||||
1975 | 42.79 | c | 47.54 | 49.03 | 53.41 | a | 65.89 | c | 69.63 | 70.71 | c | 71.35 | 66.33 | 58.87 | a | 49.00 | 39.48 | 57.00 | ||||||||
1976 | 34.16 | 43.38 | 53.26 | 54.70 | 60.90 | b | 67.21 | a | 71.61 | 70.43 | a | 66.70 | 50.81 | 41.53 | 37.48 | 54.35 | ||||||||||
1977 | 30.90 | 36.61 | 51.87 | a | 54.45 | a | 60.16 | 69.00 | 71.42 | 72.07 | a | 70.59 | a | 52.13 | a | 50.97 | 39.00 | 54.93 | ||||||||
1978 | 33.83 | a | 33.70 | a | 44.35 | 53.77 | 61.97 | 70.90 | a | 72.58 | 70.84 | 68.90 | 54.53 | a | 51.83 | a | 41.23 | 54.87 | ||||||||
1979 | 34.42 | 39.50 | 43.90 | 57.93 | 61.00 | b | 67.33 | 72.10 | a | 70.33 | a | 69.67 | 54.47 | a | 48.00 | a | 39.36 | c | 54.83 | |||||||
1980 | 42.90 | 37.69 | ----- | z | 54.63 | 63.73 | e | 68.77 | 73.20 | a | 71.48 | 70.30 | 55.00 | 46.57 | 37.42 | 56.52 | a | |||||||||
1981 | 30.35 | 41.36 | 44.32 | 57.30 | 57.70 | a | 72.13 | 73.07 | a | 71.68 | 63.70 | 55.61 | 46.10 | 39.48 | 54.40 | |||||||||||
1982 | 36.48 | h | 44.52 | c | 52.46 | c | 55.89 | b | 61.52 | d | 69.90 | 71.77 | a | 71.61 | c | 64.97 | 56.21 | c | 51.55 | a | 45.41 | d | 58.71 | a | ||
1983 | 34.92 | e | 40.36 | f | 45.19 | e | 50.00 | c | 60.12 | f | 67.80 | 71.50 | c | 71.70 | a | 64.57 | b | 58.88 | f | 46.32 | b | 37.14 | i | 56.50 | d | |
1984 | 36.38 | e | 40.21 | e | 45.61 | h | 54.65 | d | 61.75 | c | 65.34 | a | 70.47 | a | 71.41 | d | 65.07 | c | 60.50 | c | 47.68 | h | 52.60 | k | 58.42 | c |
1985 | 34.80 | a | 43.32 | 52.65 | 54.90 | 63.55 | 71.17 | 72.39 | 73.03 | 67.47 | 65.04 | c | 57.79 | a | 38.81 | 57.91 | ||||||||||
1986 | 38.81 | d | 47.92 | b | 46.86 | b | 50.50 | 61.80 | a | 70.83 | 72.48 | 71.81 | e | 70.62 | a | 61.00 | c | 58.62 | a | 46.19 | 58.12 | |||||
1987 | 40.33 | a | 44.19 | a | 49.21 | c | 50.93 | 64.94 | 70.32 | b | 72.40 | a | 73.80 | a | 68.52 | a | 48.25 | c | 49.24 | a | 45.77 | 56.49 | ||||
1988 | 38.43 | a | 38.04 | a | 46.03 | a | 57.37 | 58.45 | 67.76 | a | 71.71 | c | 72.58 | 71.21 | a | 53.84 | 51.50 | 39.90 | 55.57 | |||||||
1989 | 48.47 | a | 45.88 | b | 51.93 | a | 54.07 | 63.16 | 70.17 | 72.61 | 72.27 | a | 68.30 | 56.14 | b | 46.93 | 34.37 | a | 57.02 | |||||||
1990 | 42.97 | 49.89 | 49.10 | 51.70 | c | 62.61 | 69.83 | a | 72.07 | a | 71.62 | b | 66.07 | a | 56.27 | a | 45.70 | 44.79 | b | 56.88 | ||||||
1991 | 45.30 | a | 46.62 | b | 48.96 | f | 60.21 | a | 67.69 | b | 69.24 | a | 73.13 | 72.13 | 67.77 | 55.68 | 41.24 | a | 45.63 | a | 58.60 | a | ||||
1992 | 37.85 | e | 43.68 | a | 47.50 | a | 52.30 | 58.23 | 69.57 | 72.10 | 70.48 | 68.28 | a | 54.35 | 50.83 | a | 44.71 | c | 55.82 | |||||||
1993 | 48.68 | 40.40 | c | 45.00 | b | 48.00 | a | 58.32 | 68.53 | 71.61 | 71.55 | 68.03 | 56.60 | a | 45.93 | b | 36.67 | g | 56.61 | a | ||||||
1994 | 35.57 | c | 44.27 | b | 49.81 | e | 55.38 | f | 61.17 | b | 71.25 | b | 71.50 | a | 70.00 | 67.44 | e | 60.00 | b | 52.56 | e | 43.83 | b | 57.04 | a | |
1995 | 37.35 | 42.96 | 51.03 | a | 53.86 | a | 63.87 | 66.97 | 71.68 | 72.81 | 68.40 | 59.10 | a | 44.20 | 40.06 | 56.03 | ||||||||||
1996 | 36.03 | 41.14 | 45.48 | b | 50.79 | a | 62.13 | 67.53 | 72.35 | 70.48 | 67.76 | a | 55.50 | a | 46.43 | 41.74 | 54.78 | |||||||||
1997 | 41.90 | 45.63 | a | 55.52 | 52.93 | 59.90 | 67.93 | 72.03 | 69.83 | a | 63.61 | b | 54.26 | 42.73 | 36.87 | a | 55.26 | |||||||||
1998 | 39.00 | 39.93 | 42.23 | a | 49.90 | a | 61.81 | 69.10 | 70.93 | a | 68.61 | 68.20 | 56.20 | a | 50.97 | 45.68 | 55.21 | |||||||||
1999 | 38.81 | ----- | z | 41.90 | 55.37 | 57.87 | a | 65.83 | 68.35 | 72.55 | 65.97 | a | 58.26 | 45.36 | b | 38.84 | 55.37 | a | ||||||||
2000 | 40.59 | b | 40.57 | a | 48.77 | a | 50.41 | a | 63.74 | 68.83 | 71.94 | 70.42 | 66.00 | 52.97 | b | 47.31 | a | 38.10 | a | 54.97 | ||||||
2001 | 35.55 | 48.59 | a | 47.61 | 53.37 | 60.55 | 69.00 | 72.57 | a | 71.10 | 65.20 | 54.77 | 51.83 | 46.32 | 56.37 | |||||||||||
2002 | 42.40 | a | 38.43 | 47.03 | 61.33 | 62.70 | a | 70.23 | 70.65 | 72.45 | 73.93 | a | ----- | z | ----- | z | ----- | z | 59.91 | c | ||||||
2003 | ----- | z | 47.07 | a | 58.00 | b | 59.59 | c | 70.84 | 73.93 | 74.23 | a | 74.39 | 68.96 | c | 60.54 | c | 51.60 | e | 40.28 | f | 63.92 | b | |||
2004 | 41.17 | a | 43.96 | a | 52.52 | b | 54.56 | c | 65.17 | b | 72.14 | b | 74.17 | b | 73.58 | 71.20 | 66.15 | d | 55.15 | c | 42.72 | b | 59.37 | |||
2005 | 45.90 | a | 49.28 | c | 48.78 | d | 53.39 | b | 63.38 | e | 72.87 | 76.10 | b | 75.53 | a | 72.45 | a | 60.60 | a | 52.28 | a | 41.84 | l | 60.96 | a | |
2006 | 46.77 | a | 43.81 | a | 49.87 | a | 61.73 | 66.39 | 71.97 | 74.10 | 76.00 | 70.03 | 59.03 | 46.88 | d | 47.13 | a | 59.48 | ||||||||
2007 | 44.42 | 41.37 | a | 52.31 | b | 54.60 | 64.48 | b | 72.10 | 74.97 | a | 76.84 | 72.27 | 63.32 | 47.20 | 49.93 | c | 59.48 | ||||||||
2008 | 40.93 | b | 43.71 | a | 47.45 | 57.83 | 65.65 | 73.00 | 74.55 | 74.23 | 71.07 | 65.07 | p | 47.20 | 48.63 | a | 58.57 | a | ||||||||
2009 | 43.61 | 40.71 | d | 52.42 | 57.20 | 67.65 | 75.57 | 73.97 | 73.29 | 72.10 | 61.94 | 50.00 | 43.61 | 59.34 | ||||||||||||
2010 | 36.97 | 36.64 | 44.36 | i | 58.57 | 69.48 | 74.90 | 76.89 | d | 77.26 | 72.10 | 59.10 | b | 49.67 | 34.00 | 58.69 | a | |||||||||
2011 | 38.08 | f | 44.71 | 52.71 | 59.13 | 62.65 | 74.47 | 75.06 | 76.35 | 69.03 | a | 56.19 | 50.00 | 46.97 | 60.66 | a | ||||||||||
2012 | 46.68 | 50.14 | 58.52 | 59.83 | 67.84 | 71.47 | 74.35 | 73.87 | 69.77 | 60.29 | 47.07 | 47.23 | 60.59 | |||||||||||||
2013 | 49.58 | 46.50 | 44.73 | a | 58.27 | 62.74 | 73.90 | 73.42 | 74.29 | 71.93 | 66.55 | k | 47.50 | 46.68 | 59.05 | a | ||||||||||
2014 | 32.16 | 44.61 | 46.71 | 56.57 | 65.10 | 72.73 | 73.68 | 75.65 | 71.77 | 60.68 | 43.23 | 47.45 | 57.53 | |||||||||||||
2015 | 41.77 | 38.29 | 55.06 | 64.93 | 67.81 | 74.23 | 75.45 | i | 74.65 | 70.23 | 61.84 | 57.40 | 54.65 | 60.08 | a | |||||||||||
2016 | 41.10 | 44.66 | 54.71 | 58.93 | 65.55 | 72.80 | 76.65 | 75.16 | 72.93 | 62.97 | 49.70 | 49.32 | 60.37 | |||||||||||||
2017 | 50.10 | 49.57 | 50.84 | 59.10 | 65.00 | 72.40 | 75.81 | 75.48 | 68.70 | 63.00 | 53.10 | 45.65 | 60.73 | |||||||||||||
2018 | 37.19 | 56.24 | c | 51.03 | 52.40 | 67.06 | 73.04 | f | 75.23 | 73.52 | 73.80 | 64.16 | l | 49.03 | 48.81 | 58.43 | b | |||||||||
2019 | 43.58 | 49.96 | 48.87 | 57.27 | 68.42 | 74.97 | 75.16 | 76.38 | e | 75.07 | 67.58 | 49.83 | 49.61 | 61.39 | ||||||||||||
2020 | 47.74 | d | 50.48 | 60.83 | a | 60.00 | 65.83 | a | 74.34 | a | 75.45 | 75.74 | 72.07 | 65.84 | 58.90 | 43.29 | 62.54 | |||||||||
2021 | 46.13 | 46.68 | 55.68 | 55.77 | d | 65.68 | 73.50 | 75.61 | 74.13 | 70.67 | c | 65.42 | 48.43 | 53.74 | 60.95 | |||||||||||
2022 | 42.10 | 46.79 | 53.13 | 58.97 | 68.94 | 74.77 | 76.10 | 74.69 | b | 70.93 | 57.58 | 54.83 | 47.45 | 60.52 | ||||||||||||
2023 | 48.42 | 52.61 | 52.10 | a | 61.59 | m | 65.77 | 69.08 | r | 76.63 | a | 77.44 | d | 71.07 | 60.00 | b | 53.78 | u | ----- | z | 63.01 | d | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.16 | 43.88 | 50.04 | 55.52 | 63.61 | 70.62 | 73.04 | 72.90 | 69.23 | 58.17 | 49.32 | 43.60 | 57.45 | |||||||||||||
S.D. | 5.67 | 4.62 | 4.28 | 3.56 | 3.20 | 2.70 | 1.97 | 2.21 | 2.71 | 4.32 | 4.16 | 4.86 | 2.36 | |||||||||||||
SKEW | 0.27 | 0.22 | 0.24 | 0.20 | 0.10 | 0.05 | 0.13 | 0.33 | -0.17 | 0.15 | 0.39 | 0.04 | 0.48 | |||||||||||||
MAX | 56.87 | 56.24 | 60.83 | 64.93 | 70.84 | 75.57 | 76.89 | 77.44 | 75.07 | 67.58 | 58.90 | 54.65 | 62.54 | |||||||||||||
MIN | 30.35 | 33.70 | 41.90 | 48.00 | 57.70 | 65.34 | 68.35 | 68.61 | 63.61 | 48.25 | 41.24 | 34.00 | 54.35 | |||||||||||||
YRS | 49 | 50 | 48 | 50 | 51 | 50 | 51 | 52 | 52 | 47 | 49 | 45 | 34 |