YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.47 | o | 57.05 | 45.59 | b | 34.37 | 23.55 | b | 40.14 | h | ||
1972 | 25.65 | a | 31.97 | 40.85 | a | 43.28 | 51.25 | c | 60.97 | a | 68.44 | 65.21 | 57.57 | 50.23 | g | 30.80 | 23.42 | l | 47.60 | b | ||||||
1973 | 19.27 | ----- | z | ----- | z | ----- | z | ----- | z | 60.38 | j | 65.00 | 65.42 | 55.88 | a | 48.12 | b | 29.88 | n | 26.39 | c | 46.68 | f | |||
1974 | 23.53 | 23.54 | 39.56 | 41.34 | e | 54.97 | p | 64.43 | 65.89 | d | 63.98 | 56.47 | a | 49.10 | b | 34.95 | a | 23.34 | 44.19 | a | ||||||
1975 | 19.21 | 21.98 | 31.56 | 39.05 | b | 47.40 | a | 57.76 | k | 66.21 | 64.81 | 57.21 | d | 46.92 | 33.88 | a | 27.59 | c | 41.44 | a | ||||||
1976 | 22.00 | i | 34.84 | a | 34.43 | a | 41.98 | a | 52.65 | n | 61.54 | b | 67.32 | a | 64.79 | 57.98 | b | 44.28 | a | 34.14 | a | 26.50 | e | 46.78 | b | |
1977 | 19.60 | 29.20 | f | 34.56 | d | 46.03 | a | 51.98 | b | 64.88 | 67.71 | e | 67.37 | 59.00 | c | 48.86 | f | 36.62 | i | 29.89 | d | 49.00 | c | |||
1978 | 25.91 | c | 26.48 | b | 38.50 | b | 44.15 | d | 48.98 | a | 62.22 | a | 68.46 | g | 64.22 | a | 58.90 | 50.45 | b | 37.52 | a | 21.81 | e | 43.56 | a | |
1979 | 19.04 | d | 25.43 | a | 34.36 | b | 43.50 | n | 51.43 | a | 59.93 | a | 67.71 | e | 64.56 | 61.45 | 50.11 | 29.45 | 29.94 | f | 46.35 | b | ||||
1980 | 29.63 | d | 32.59 | f | 34.10 | b | 36.27 | s | 50.87 | a | 62.21 | b | 69.38 | c | 65.85 | 59.18 | 42.60 | k | 35.65 | d | 34.82 | c | 49.08 | c | ||
1981 | 30.56 | 31.89 | 34.89 | 47.16 | b | 51.78 | b | 64.65 | 67.96 | f | 65.72 | a | 59.59 | c | 46.25 | a | 38.02 | a | 29.55 | l | 47.05 | b | ||||
1982 | 20.80 | d | 27.40 | b | 35.47 | a | 40.06 | v | 50.48 | 59.60 | a | 67.12 | a | 66.64 | b | 59.28 | a | 44.93 | a | 34.61 | g | 25.29 | g | 47.97 | c | |
1983 | 27.06 | 28.77 | d | 36.12 | g | 38.11 | c | 48.24 | b | 58.72 | 66.25 | a | 66.63 | 61.00 | c | 48.53 | a | 33.14 | e | 26.11 | c | 45.69 | a | |||
1984 | 22.47 | a | 26.93 | 34.83 | d | 41.12 | 56.69 | e | 61.07 | a | 68.26 | b | 66.24 | 60.44 | d | 38.40 | k | 34.46 | c | 30.85 | 45.76 | a | ||||
1985 | 26.03 | 22.19 | g | 36.87 | a | 45.69 | c | 52.69 | b | 63.33 | 68.00 | b | 67.47 | n | 54.80 | c | 48.48 | f | 36.04 | b | 28.30 | c | 45.75 | c | ||
1986 | 33.72 | d | 33.42 | c | 40.52 | 44.23 | 50.72 | d | 62.84 | b | 65.71 | 67.45 | a | 57.05 | b | 45.89 | h | 36.17 | c | 28.25 | k | 49.18 | b | |||
1987 | 25.37 | 29.89 | 33.79 | g | 44.58 | e | 50.90 | 62.25 | 66.18 | 64.17 | a | 58.17 | r | 49.17 | d | 33.30 | e | 25.88 | k | 47.31 | c | |||||
1988 | 17.20 | i | 33.50 | w | 37.59 | b | 46.40 | 54.29 | 64.87 | 68.27 | 65.40 | 58.20 | 53.00 | 35.52 | a | 27.70 | a | 51.12 | b | |||||||
1989 | 25.13 | 31.14 | 44.05 | 51.90 | 58.35 | 65.00 | 69.35 | 65.60 | 62.27 | 48.90 | 38.65 | 28.94 | 49.11 | |||||||||||||
1990 | 26.37 | 30.62 | 40.24 | 48.33 | 53.58 | g | 68.48 | f | 68.18 | l | 64.02 | b | 62.07 | a | 49.11 | c | 39.82 | m | 22.88 | c | 42.95 | d | ||||
1991 | 24.50 | 34.75 | 36.08 | 46.20 | 55.82 | 64.00 | 68.40 | 67.27 | 59.85 | f | 51.94 | 33.78 | a | 29.08 | a | 46.53 | a | |||||||||
1992 | 25.78 | a | 32.96 | a | 40.35 | a | 50.62 | 55.39 | h | 63.40 | 67.30 | a | 65.13 | 61.32 | 52.63 | a | 31.05 | a | 27.19 | b | 47.07 | a | ||||
1993 | 30.65 | a | ----- | z | ----- | z | ----- | z | ----- | z | 63.85 | 70.53 | 66.63 | 59.95 | a | 47.48 | 34.20 | 29.58 | 50.36 | d | ||||||
1994 | 29.88 | a | 30.94 | b | 41.85 | a | 47.89 | b | 56.06 | 68.82 | 70.95 | a | 69.85 | 60.86 | l | 47.74 | 35.21 | b | 31.18 | f | 49.92 | b | ||||
1995 | 28.69 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.58 | 68.79 | 58.05 | 45.15 | 37.05 | a | 28.98 | 47.61 | e | ||||||
1996 | 24.48 | 32.63 | b | 34.52 | d | 45.77 | j | 59.31 | b | 66.68 | 70.72 | d | 68.10 | b | 55.76 | a | 51.57 | q | 35.75 | h | 27.82 | a | 48.89 | c | ||
1997 | 25.77 | 31.33 | b | 40.60 | a | 41.78 | g | 53.90 | b | 62.68 | b | 68.67 | d | 66.03 | a | 62.03 | a | 46.10 | b | 34.73 | 25.57 | d | 47.04 | a | ||
1998 | 28.00 | c | 27.90 | c | 35.60 | b | 39.04 | g | 52.69 | b | 60.74 | a | 69.40 | a | 66.54 | e | 62.60 | a | 47.32 | c | 38.04 | f | 29.74 | b | 48.05 | b |
1999 | 30.32 | c | 33.54 | a | 41.03 | a | 40.98 | 51.31 | b | 61.18 | b | 67.30 | a | 63.98 | b | 57.55 | 48.69 | 40.68 | e | 26.37 | 46.91 | |||||
2000 | 29.50 | 34.71 | 36.60 | a | 44.32 | e | 57.55 | a | 70.80 | g | ----- | z | 69.58 | e | 62.33 | a | 48.00 | c | 30.55 | b | 30.55 | c | 44.37 | b | ||
2001 | 25.53 | b | 31.88 | 38.36 | c | 46.64 | b | 57.23 | a | 66.64 | b | 71.21 | 67.91 | b | 63.17 | 50.27 | e | 39.36 | b | 26.13 | d | 48.69 | ||||
2002 | 26.69 | g | 28.04 | a | 36.06 | 50.05 | 56.13 | d | 69.42 | d | 71.65 | a | 66.25 | e | 57.36 | e | 47.02 | a | 36.63 | d | 28.13 | 49.70 | a | |||
2003 | 34.69 | b | 32.08 | b | 37.55 | a | 45.29 | a | 56.60 | e | 64.19 | l | 74.38 | a | 69.22 | d | 60.46 | d | 53.55 | b | 36.34 | a | 30.74 | d | 48.26 | a |
2004 | 29.45 | c | 27.93 | a | 45.19 | d | 45.69 | a | 55.62 | a | 65.89 | c | 68.70 | c | 66.93 | b | 58.33 | d | 46.29 | b | 34.38 | e | 26.56 | d | 47.58 | |
2005 | 32.57 | b | 32.90 | c | 35.23 | a | 42.89 | b | 53.20 | f | 61.89 | c | 70.85 | a | 65.23 | c | 60.71 | b | 48.72 | a | 37.30 | c | 25.57 | c | 46.71 | a |
2006 | 27.38 | f | 29.94 | c | 36.96 | c | 46.75 | d | 56.98 | b | 66.56 | f | 70.46 | h | 65.69 | b | 52.66 | b | 46.21 | c | 36.66 | b | 25.52 | f | 46.48 | d |
2007 | 21.89 | c | 28.96 | e | 39.78 | d | ----- | z | 52.38 | f | 63.05 | h | 69.30 | c | 68.10 | a | 59.69 | d | 48.02 | g | 39.05 | a | 21.92 | e | 43.59 | d |
2008 | 20.45 | a | 26.40 | 36.14 | b | 41.87 | c | 50.94 | e | 63.97 | a | 68.26 | b | 68.20 | d | 58.95 | a | 48.07 | c | 38.19 | d | 26.63 | e | 45.67 | ||
2009 | 26.80 | d | 32.41 | f | 36.78 | b | 41.95 | b | ----- | z | 60.46 | d | 70.95 | c | 67.27 | g | 59.33 | a | 48.87 | l | ----- | z | 18.39 | q | 49.38 | f |
2010 | 22.08 | e | 25.23 | f | 33.34 | f | 44.07 | a | 52.02 | b | 66.89 | c | 72.02 | c | 66.32 | c | 61.69 | a | 49.35 | e | 31.53 | a | 30.05 | k | 51.77 | c |
2011 | 22.10 | e | 27.09 | e | 40.18 | a | 44.02 | d | 51.00 | c | 64.95 | h | 70.90 | g | 69.79 | b | 58.30 | e | 45.79 | b | 34.94 | d | 23.62 | c | 41.68 | b |
2012 | 27.72 | d | 28.62 | a | 33.94 | o | 54.42 | x | 57.70 | d | 69.60 | f | 70.05 | b | 71.08 | a | 62.41 | a | 50.07 | d | ----- | z | 27.95 | b | 49.45 | d |
2013 | 22.00 | d | ----- | z | ----- | z | 45.35 | f | 53.75 | e | ----- | z | 70.93 | b | 67.19 | b | 59.50 | d | 43.21 | c | 35.93 | b | 21.70 | d | 46.78 | d |
2014 | 26.30 | a | 33.50 | f | 37.62 | e | 43.31 | d | 53.76 | f | ----- | z | 69.96 | f | 65.22 | d | 64.58 | d | 49.68 | f | 35.21 | a | 28.27 | c | 42.93 | e |
2015 | 28.48 | c | 33.98 | d | 42.00 | b | 43.87 | 49.75 | a | 64.90 | d | 66.72 | a | 67.47 | a | 62.28 | a | 50.95 | a | 34.91 | b | 23.41 | c | 47.39 | ||
2016 | 22.25 | a | 12.90 | x | ----- | z | ----- | z | 51.84 | c | 68.84 | b | 70.78 | d | 63.50 | b | 58.82 | e | 51.44 | 38.50 | a | 28.50 | 50.50 | c | ||
2017 | 27.40 | e | 35.10 | b | 41.46 | e | 43.29 | a | 50.86 | c | 66.98 | e | 68.67 | g | 66.80 | i | 59.55 | b | 47.96 | h | 41.28 | c | 30.04 | c | 44.00 | c |
2018 | 27.81 | m | 29.70 | f | 36.40 | a | 47.02 | a | 57.08 | a | 67.06 | e | 70.86 | c | 68.11 | c | 62.30 | g | 46.97 | a | 32.65 | 25.14 | b | 50.14 | c | |
2019 | 25.32 | f | 27.24 | a | 39.07 | b | 46.11 | c | 48.23 | c | 62.70 | b | 70.55 | c | 69.55 | c | 61.40 | d | 42.45 | c | 33.00 | a | 26.85 | 47.92 | a | |
2020 | 24.16 | b | 30.29 | 39.42 | a | 46.23 | 57.84 | b | 65.97 | a | 70.89 | 72.28 | a | 60.70 | c | 50.29 | c | 39.06 | c | 23.58 | 48.39 | |||||
2021 | 25.12 | b | 27.76 | a | 35.91 | c | 45.93 | a | 54.93 | c | 67.91 | c | 70.00 | c | 67.53 | 62.77 | 46.02 | d | 39.67 | c | 30.18 | a | 47.81 | |||
2022 | 25.77 | a | ----- | z | 35.20 | k | 44.89 | c | 56.19 | b | 65.58 | d | 69.76 | d | 66.54 | c | 62.25 | j | 46.56 | d | 30.38 | a | 26.64 | b | 48.03 | c |
2023 | 22.28 | a | 25.50 | f | 33.69 | e | 42.19 | i | 54.23 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.74 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.74 | 30.03 | 37.78 | 44.82 | 53.45 | 63.97 | 68.94 | 66.71 | 59.52 | 48.12 | 35.42 | 27.03 | 47.69 | |||||||||||||
S.D. | 3.86 | 3.27 | 3.01 | 2.94 | 3.19 | 2.73 | 2.04 | 1.98 | 2.43 | 2.57 | 2.85 | 2.86 | 1.09 | |||||||||||||
SKEW | 0.19 | -0.35 | 0.36 | 0.09 | 0.02 | 0.14 | 0.16 | 0.65 | -0.37 | 0.07 | -0.06 | 0.05 | -0.55 | |||||||||||||
MAX | 34.69 | 35.10 | 45.19 | 51.90 | 59.31 | 69.42 | 74.38 | 72.28 | 64.58 | 53.55 | 41.28 | 34.82 | 49.11 | |||||||||||||
MIN | 19.04 | 21.98 | 31.56 | 38.11 | 47.40 | 58.72 | 65.00 | 63.50 | 52.66 | 42.45 | 29.45 | 21.70 | 45.67 | |||||||||||||
YRS | 46 | 37 | 42 | 38 | 41 | 39 | 43 | 48 | 47 | 41 | 44 | 42 | 8 |