YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.29 | w | 67.52 | b | 63.17 | a | 57.23 | 46.71 | 36.77 | 31.03 | a | 50.40 | f | |||
1977 | 25.61 | 31.61 | 31.39 | 46.37 | 55.74 | 69.50 | 70.81 | 68.20 | a | 62.60 | 51.90 | 37.27 | 28.71 | 48.31 | ||||||||||||
1978 | 27.23 | 30.26 | a | 39.06 | 45.23 | 50.65 | 66.07 | 72.45 | 67.79 | b | 62.43 | 52.29 | 37.57 | 24.34 | b | 47.95 | ||||||||||
1979 | 21.07 | d | 30.25 | 34.65 | ----- | z | ----- | z | 64.50 | f | ----- | z | ----- | z | ----- | z | ----- | z | 32.00 | l | 37.42 | s | 28.66 | i | ||
1980 | ----- | z | ----- | z | ----- | z | 39.32 | k | 51.24 | j | ----- | z | ----- | z | 69.44 | o | ----- | z | 55.50 | o | 48.23 | q | ----- | z | ----- | z |
1981 | 37.82 | n | ----- | z | ----- | z | 52.16 | k | 52.84 | l | 70.27 | o | 72.27 | t | 70.23 | r | 63.72 | l | 49.97 | 42.73 | 33.63 | a | 42.11 | i | ||
1982 | 28.58 | 33.86 | 38.94 | 43.53 | 53.10 | a | ----- | z | ----- | z | 68.42 | 58.79 | b | 47.13 | 36.62 | a | 32.61 | c | 44.16 | b | ||||||
1983 | 34.52 | b | 34.39 | 35.82 | c | 37.90 | a | 49.00 | 62.13 | 72.10 | a | 70.72 | f | 64.62 | a | 52.97 | a | 37.17 | a | 25.17 | a | 45.98 | a | |||
1984 | 30.77 | a | 34.50 | a | 36.57 | a | 39.70 | c | 56.22 | d | 63.30 | c | 70.40 | a | 67.32 | 62.07 | c | 42.48 | f | 38.12 | d | 31.69 | b | 48.24 | a | |
1985 | 28.47 | a | 29.19 | a | 37.38 | e | 45.36 | b | 54.31 | b | 67.07 | a | 70.07 | a | 71.63 | a | 58.88 | e | 50.89 | c | 34.24 | a | 30.57 | a | 48.17 | |
1986 | 38.53 | a | 32.50 | 42.57 | a | 44.41 | a | 56.25 | c | 67.39 | b | 68.64 | c | 69.57 | c | 58.46 | b | 48.70 | d | 38.38 | a | 33.93 | b | 49.95 | ||
1987 | 30.38 | b | 35.19 | b | 38.56 | d | 48.75 | b | 56.03 | b | 68.67 | 72.52 | b | 66.87 | a | 62.97 | 55.03 | b | 39.78 | c | 27.96 | e | 50.23 | |||
1988 | 26.70 | d | 35.21 | 35.33 | g | 47.59 | c | 57.38 | e | 69.50 | b | 72.32 | 70.67 | d | 61.34 | a | 55.83 | a | 35.69 | a | 31.29 | 51.23 | a | |||
1989 | 32.89 | c | 32.11 | a | 43.13 | 47.78 | c | 58.52 | d | 64.37 | c | 73.13 | 67.65 | 64.48 | c | 50.70 | d | 41.04 | b | 29.39 | 50.43 | |||||
1990 | 31.83 | a | 34.32 | 39.35 | 46.47 | 54.03 | 70.93 | 69.97 | a | 68.90 | 65.83 | 51.19 | 40.37 | 28.80 | a | 50.17 | ||||||||||
1991 | 28.97 | 38.07 | 36.32 | c | 42.57 | 57.93 | a | 66.70 | 70.67 | a | 69.26 | 63.34 | a | 53.81 | 35.00 | 34.23 | 49.74 | |||||||||
1992 | 34.26 | 35.07 | 40.65 | 50.30 | 58.61 | 64.83 | 67.80 | a | 67.07 | b | 62.89 | b | 55.56 | d | 32.41 | a | 30.43 | c | 49.99 | |||||||
1993 | 33.69 | e | 31.92 | b | 39.93 | a | 43.70 | c | 55.25 | c | 66.21 | b | 71.38 | b | 68.25 | c | 61.96 | d | 49.07 | b | 34.28 | e | 30.67 | a | 48.86 | |
1994 | 31.00 | d | 32.15 | a | 43.35 | e | 46.04 | d | 58.64 | c | 72.18 | b | 73.17 | b | 71.69 | b | 63.07 | c | 49.24 | b | 35.59 | c | 36.58 | e | 51.06 | |
1995 | 30.32 | c | 38.73 | b | 39.62 | g | 41.88 | e | 48.48 | b | 63.14 | b | 69.37 | a | 73.31 | e | 61.64 | b | 51.14 | c | 41.21 | a | 34.57 | c | 50.35 | a |
1996 | 30.72 | f | 35.85 | b | 38.07 | b | 45.84 | e | 60.81 | e | 67.88 | f | 73.53 | l | 71.93 | b | 60.08 | d | 51.54 | e | 40.95 | h | 30.67 | g | 52.02 | e |
1997 | 31.68 | f | 33.11 | 43.16 | 39.47 | 54.84 | 66.37 | 71.45 | 67.74 | 64.48 | c | 49.90 | k | 34.35 | d | 31.17 | a | 50.61 | b | |||||||
1998 | 31.90 | a | 32.22 | a | 37.90 | 43.10 | 60.07 | b | 64.78 | c | 73.46 | c | 68.39 | 69.14 | b | 51.03 | b | 41.63 | 35.68 | 50.78 | ||||||
1999 | 32.18 | c | 36.00 | b | 43.87 | a | 42.10 | 53.61 | 66.46 | b | 72.00 | 69.13 | 61.47 | 56.79 | b | 50.55 | a | 34.26 | 51.54 | |||||||
2000 | 33.42 | 39.04 | a | 39.74 | 51.43 | 62.00 | c | 70.10 | 74.43 | a | 73.23 | e | 66.34 | a | 53.76 | b | 33.17 | a | 32.00 | 52.39 | ||||||
2001 | 32.43 | a | 35.00 | 38.70 | a | 49.18 | b | 59.60 | a | 71.50 | 74.47 | a | 69.97 | a | 65.96 | b | 54.00 | b | 43.97 | a | 33.50 | a | 52.36 | |||
2002 | 32.20 | a | 35.37 | a | 37.11 | c | 53.30 | 59.57 | a | 74.03 | 77.86 | b | 73.81 | 62.48 | c | 50.17 | b | 39.69 | a | 32.19 | 52.32 | |||||
2003 | 37.87 | 31.22 | a | 39.17 | a | 48.89 | c | 59.20 | a | 66.54 | b | 79.48 | 72.32 | 63.80 | 60.03 | 36.70 | 35.77 | a | 52.58 | |||||||
2004 | 33.61 | 33.21 | 46.14 | b | 47.23 | 60.23 | 67.93 | a | 71.73 | a | 69.32 | 62.63 | c | 51.23 | 38.33 | 32.63 | a | 51.19 | ||||||||
2005 | 34.68 | 34.25 | 36.07 | a | 48.31 | a | 58.10 | a | 65.62 | a | 75.80 | a | 68.07 | a | 65.50 | b | 53.03 | 40.71 | b | 29.23 | 50.78 | |||||
2006 | 32.48 | 33.08 | b | 37.20 | a | 52.17 | a | 60.13 | a | 70.80 | 71.90 | 68.00 | 55.57 | 47.63 | a | 39.77 | 32.87 | 50.13 | ||||||||
2007 | 31.52 | 32.81 | a | 42.50 | a | 48.24 | a | 56.87 | a | 69.83 | 73.94 | 71.00 | 63.67 | 54.97 | 44.24 | a | 26.71 | 51.36 | ||||||||
2008 | 25.31 | b | 31.25 | a | 34.96 | g | 43.93 | 54.77 | a | 67.73 | 73.67 | a | 69.94 | 63.87 | 53.58 | 41.27 | 29.57 | a | 50.44 | a | ||||||
2009 | 29.35 | 30.29 | 35.81 | 41.87 | 56.30 | a | 60.60 | 70.97 | 69.45 | 60.53 | 43.06 | 42.20 | 22.68 | 46.93 | ||||||||||||
2010 | 30.13 | 25.07 | 35.48 | 41.33 | 52.90 | 69.27 | 72.65 | 68.42 | 67.27 | 51.10 | 34.27 | 32.23 | 48.34 | |||||||||||||
2011 | 26.55 | 25.93 | 36.13 | 39.83 | 49.65 | 66.33 | 72.39 | 71.48 | 61.10 | 48.23 | 35.63 | 29.61 | 46.91 | |||||||||||||
2012 | 32.29 | 27.61 | a | 42.10 | 49.53 | 58.13 | 71.93 | 72.55 | 69.52 | 61.87 | 49.65 | 42.83 | 27.81 | 50.48 | ||||||||||||
2013 | 28.29 | 26.14 | 34.84 | 39.13 | 52.65 | 69.80 | 71.03 | 68.94 | 61.87 | 46.26 | 37.03 | 26.87 | 46.90 | |||||||||||||
2014 | 28.42 | 28.86 | 35.74 | 40.07 | 52.35 | 65.60 | 71.74 | 65.48 | 63.57 | 52.55 | 35.77 | 29.52 | 47.47 | |||||||||||||
2015 | 33.42 | 33.18 | 41.14 | b | 43.62 | a | 49.94 | 69.40 | 67.77 | 70.19 | 64.97 | 54.00 | 35.57 | 27.97 | 49.26 | |||||||||||
2016 | 28.87 | 34.28 | 36.29 | 42.30 | 52.87 | 71.80 | 72.45 | 65.68 | 62.73 | 54.74 | 43.20 | 29.00 | 49.52 | |||||||||||||
2017 | 26.87 | 34.39 | 42.48 | 43.70 | 53.10 | 69.57 | 72.10 | 67.74 | 62.57 | 51.00 | 44.73 | 33.42 | 50.14 | |||||||||||||
2018 | 34.52 | 29.57 | 36.97 | 45.60 | 60.65 | 70.73 | 74.58 | 70.84 | 65.93 | 46.65 | 32.97 | 28.32 | 49.78 | |||||||||||||
2019 | 29.71 | 26.96 | 34.58 | 44.14 | a | 47.16 | 63.97 | 73.00 | 72.00 | 66.57 | 45.87 | 38.87 | 30.19 | 47.75 | ||||||||||||
2020 | 28.61 | 28.55 | 36.58 | 42.90 | 58.81 | 67.23 | 71.84 | 74.32 | 62.87 | 54.81 | 40.80 | 30.81 | 49.84 | |||||||||||||
2021 | 30.16 | 27.46 | 35.45 | 44.13 | 53.90 | 70.90 | 73.52 | 69.77 | 66.97 | 50.16 | 43.53 | 34.29 | 50.02 | |||||||||||||
2022 | 33.35 | 29.18 | 36.10 | 42.47 | 55.06 | 67.87 | 72.00 | 70.29 | 67.53 | 50.68 | 34.73 | 28.52 | 48.98 | |||||||||||||
2023 | 27.10 | 30.21 | 30.97 | 41.87 | 56.77 | 65.73 | 79.23 | 72.65 | 66.37 | 54.03 | 42.50 | 34.94 | 50.20 | |||||||||||||
2024 | 29.68 | 33.66 | 35.74 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.02 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.68 | 32.24 | 38.22 | 44.85 | 55.69 | 67.72 | 72.33 | 69.53 | 63.12 | 51.42 | 38.74 | 30.83 | 49.80 | |||||||||||||
S.D. | 3.37 | 3.32 | 3.34 | 3.69 | 3.67 | 3.00 | 2.57 | 2.33 | 2.81 | 3.32 | 3.87 | 3.12 | 1.58 | |||||||||||||
SKEW | -0.17 | -0.20 | 0.26 | 0.30 | -0.43 | -0.17 | 0.74 | -0.11 | -0.34 | -0.08 | 0.56 | -0.37 | -0.18 | |||||||||||||
MAX | 38.53 | 39.04 | 46.14 | 53.30 | 62.00 | 74.03 | 79.48 | 74.32 | 69.14 | 60.03 | 50.55 | 36.58 | 52.58 | |||||||||||||
MIN | 21.07 | 25.07 | 30.97 | 37.90 | 47.16 | 60.60 | 67.52 | 63.17 | 55.57 | 43.06 | 32.41 | 22.68 | 46.90 | |||||||||||||
YRS | 44 | 46 | 43 | 44 | 44 | 42 | 43 | 44 | 45 | 44 | 45 | 45 | 36 |