YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | 48.21 | 51.60 | a | 60.47 | a | 66.05 | c | 54.48 | a | 41.86 | b | 37.12 | 24.78 | d | 48.07 | d | ||
1982 | 7.36 | b | 20.42 | b | 27.00 | c | 34.24 | a | 46.43 | d | 55.02 | c | 61.25 | e | 62.58 | e | 52.80 | b | 43.60 | b | 25.96 | b | 24.90 | b | 38.46 | |
1983 | 30.14 | b | 33.57 | 32.68 | i | 39.27 | b | 48.77 | a | 55.88 | b | 61.09 | d | 65.94 | d | 50.76 | c | 46.05 | a | 32.09 | b | 5.66 | b | 42.66 | a | |
1984 | 27.82 | a | 34.16 | a | 32.98 | c | 39.82 | 46.52 | b | 55.06 | c | 64.25 | a | 65.05 | a | 46.98 | 41.07 | d | 30.14 | e | 13.47 | a | 41.44 | |||
1985 | 21.88 | a | 19.46 | b | 30.31 | e | 40.79 | d | 51.58 | 55.17 | c | 66.29 | 58.56 | 43.32 | 40.16 | 12.09 | a | 26.38 | a | 38.83 | ||||||
1986 | 34.66 | 20.83 | a | 40.12 | b | 40.56 | c | 49.66 | b | 60.66 | a | 59.10 | 64.00 | 45.52 | e | 47.33 | b | 27.55 | a | 29.83 | d | 43.32 | ||||
1987 | 26.86 | b | 31.84 | 32.37 | a | 46.12 | b | 52.76 | b | 60.46 | b | 60.78 | b | 55.83 | a | 55.98 | b | 47.33 | a | 39.35 | c | 26.75 | a | 44.70 | ||
1988 | 19.87 | a | 27.02 | c | 33.47 | b | 43.16 | b | 51.72 | b | 61.22 | a | 63.10 | 62.76 | f | 53.10 | e | 48.14 | c | 32.42 | 27.97 | a | 41.93 | a | ||
1989 | 24.90 | b | 12.76 | a | 29.67 | a | 39.69 | c | 47.57 | b | 56.09 | c | 63.45 | b | 58.76 | 53.57 | a | 44.02 | b | 32.81 | d | 27.13 | 40.87 | |||
1990 | 27.72 | b | 23.75 | 33.15 | a | 41.54 | b | 47.13 | d | 54.43 | a | 60.81 | e | 64.50 | d | 60.28 | e | 40.22 | b | 32.31 | a | 15.03 | b | 41.74 | ||
1991 | 18.88 | c | 35.23 | f | 30.40 | a | 40.08 | e | 47.63 | e | 53.84 | k | 63.95 | c | 65.75 | c | 55.22 | a | 41.48 | e | 30.89 | b | 32.22 | d | 42.65 | b |
1992 | 31.74 | 36.00 | e | 39.54 | c | 42.81 | c | 52.45 | c | 59.07 | b | 57.25 | c | 60.67 | e | 52.38 | e | 45.98 | c | 32.62 | b | 14.97 | a | 43.79 | ||
1993 | 17.26 | d | 21.75 | 35.38 | a | 42.55 | a | 53.91 | c | 54.86 | e | 54.55 | a | 57.60 | b | 52.28 | 43.45 | l | 27.67 | 31.50 | c | 40.85 | a | |||
1994 | 27.34 | b | 17.39 | a | 36.60 | 41.94 | e | 52.29 | b | 57.10 | e | 63.52 | g | 63.37 | e | 58.86 | b | 42.98 | 27.55 | 27.32 | 41.16 | a | ||||
1995 | 28.26 | 27.54 | c | 29.98 | c | 39.13 | c | 46.62 | b | 54.62 | d | 62.06 | g | 60.53 | m | 54.63 | c | 40.14 | c | 33.27 | d | 25.73 | 37.99 | b | ||
1996 | 13.87 | 27.68 | d | 27.12 | b | 43.64 | b | 44.98 | f | 57.24 | g | 64.68 | 64.17 | b | 50.18 | b | 41.79 | b | 21.00 | a | 14.40 | 36.85 | b | |||
1997 | 19.32 | 29.42 | b | 30.25 | a | 35.82 | 47.94 | 56.12 | a | 62.52 | 62.55 | b | 58.30 | b | 44.81 | e | 34.75 | 30.15 | a | 42.66 | ||||||
1998 | 20.65 | a | 32.02 | 30.92 | 42.20 | c | 52.04 | f | ----- | z | 68.09 | i | 62.70 | h | 58.16 | h | 46.24 | h | 33.09 | a | 21.88 | e | 30.13 | f | ||
1999 | 25.84 | c | 30.83 | d | 34.62 | g | 40.22 | c | 48.24 | f | 53.71 | a | 59.50 | c | 66.17 | g | 52.14 | b | 43.48 | f | 39.82 | b | 32.54 | h | 43.15 | e |
2000 | 23.71 | b | 28.41 | a | 34.60 | a | 44.05 | b | 50.07 | b | 56.60 | e | 65.84 | b | 65.90 | a | 52.64 | e | 45.71 | c | 28.52 | c | 23.71 | c | 43.31 | |
2001 | 30.78 | a | 20.18 | c | 34.52 | c | 39.52 | d | 52.96 | e | 56.45 | b | 64.96 | c | 67.70 | a | 59.21 | a | 43.61 | 38.45 | a | 26.74 | b | 44.59 | ||
2002 | 25.05 | a | 28.28 | a | 20.10 | 35.44 | d | 46.15 | e | 55.76 | a | 67.50 | e | 60.28 | f | 53.47 | o | 35.68 | l | 38.13 | k | 31.12 | j | 39.75 | e | |
2003 | 27.42 | l | 28.15 | k | 27.86 | q | 36.96 | f | ----- | z | ----- | z | 66.77 | 64.16 | 53.68 | ----- | z | ----- | z | 29.19 | m | 61.54 | i | |||
2004 | 21.17 | d | 31.62 | 38.45 | 43.88 | b | 45.89 | 54.32 | 64.14 | b | 61.47 | 52.43 | b | 42.56 | 35.53 | a | 28.12 | g | 44.68 | a | ||||||
2005 | 19.65 | 29.11 | 29.11 | v | 39.05 | b | 47.22 | d | 51.87 | c | 62.83 | g | 59.85 | 50.25 | f | 43.57 | c | 34.77 | 26.50 | u | 40.64 | d | ||||
2006 | 32.42 | m | 26.62 | g | 27.00 | q | 42.79 | p | 48.28 | v | 57.20 | g | 66.89 | i | 61.79 | l | ----- | z | 44.53 | o | 33.62 | q | 27.22 | v | ----- | z |
2007 | 25.00 | m | 22.16 | f | 37.05 | t | 37.31 | n | 49.88 | n | 57.77 | f | 70.69 | d | 60.93 | c | 55.06 | l | 42.92 | g | 29.78 | g | 23.36 | m | 65.81 | j |
2008 | 23.20 | u | ----- | z | 30.98 | f | 35.43 | p | 46.46 | e | 53.46 | d | ----- | z | ----- | z | ----- | z | 44.10 | e | 38.20 | b | 14.41 | i | 45.55 | h |
2009 | 20.48 | j | 26.10 | r | 26.82 | i | 34.85 | c | 47.61 | h | 51.79 | i | 62.15 | k | 58.70 | f | 57.22 | n | 36.57 | h | 35.18 | e | 13.02 | 27.68 | i | |
2010 | 24.10 | b | 27.52 | 35.05 | c | 36.37 | 38.56 | e | 49.04 | f | 55.98 | b | 53.07 | b | 46.27 | d | 45.29 | g | 24.50 | d | 23.17 | a | 36.46 | b | ||
2011 | 18.52 | c | ----- | z | 25.54 | c | 29.52 | a | 42.18 | a | 52.26 | e | 59.97 | b | 61.12 | a | 54.90 | 41.43 | a | 28.59 | c | 26.07 | a | 40.01 | a | |
2012 | 23.08 | 22.22 | 30.50 | b | 40.59 | a | 44.33 | a | 52.70 | 62.32 | 60.19 | 51.95 | j | 36.06 | 32.67 | 21.74 | 38.76 | a | ||||||||
2013 | 25.17 | a | 27.61 | 26.85 | 31.82 | 48.05 | 54.20 | 62.00 | 62.11 | 52.53 | 38.37 | 30.20 | 18.47 | 39.78 | ||||||||||||
2014 | 24.48 | 12.57 | 21.93 | a | 36.00 | ----- | z | 51.17 | 63.03 | 59.79 | 50.27 | 48.89 | 23.48 | b | 27.65 | 38.11 | a | |||||||||
2015 | 27.90 | 27.79 | 37.08 | 39.25 | 43.78 | d | 59.22 | n | 60.10 | 61.23 | 50.82 | 47.31 | ----- | z | ----- | z | 43.92 | c | ||||||||
2016 | ----- | z | ----- | z | ----- | z | 43.10 | e | 46.13 | a | 55.53 | l | 60.74 | 58.76 | 50.57 | 42.69 | r | 40.41 | b | 13.27 | 44.71 | e | ||||
2017 | 13.21 | e | 20.63 | a | 28.71 | e | ----- | z | ----- | z | ----- | z | 65.18 | c | 61.47 | 52.85 | ----- | z | ----- | z | ----- | z | 40.34 | f | ||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | 43.48 | 52.90 | i | ----- | z | ----- | z | ----- | z | ----- | z | 21.50 | e | 14.18 | 26.39 | i | ||
2023 | 27.32 | 22.18 | 16.60 | j | ----- | z | 54.12 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.75 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.50 | 25.67 | 31.58 | 39.58 | 47.81 | 55.38 | 62.41 | 61.83 | 52.65 | 43.41 | 31.08 | 22.43 | 41.96 | |||||||||||||
S.D. | 5.86 | 6.09 | 4.95 | 3.79 | 3.54 | 2.69 | 3.45 | 3.34 | 3.96 | 3.16 | 6.20 | 6.89 | 2.14 | |||||||||||||
SKEW | -0.63 | -0.44 | -0.34 | -0.77 | -0.31 | 0.63 | -0.04 | -0.50 | -0.26 | -0.21 | -0.89 | -0.65 | -0.34 | |||||||||||||
MAX | 34.66 | 36.00 | 40.12 | 46.12 | 53.91 | 61.22 | 70.69 | 67.70 | 60.28 | 48.89 | 40.41 | 32.22 | 44.70 | |||||||||||||
MIN | 7.36 | 12.57 | 20.10 | 29.52 | 38.56 | 51.17 | 54.55 | 53.07 | 43.32 | 36.06 | 12.09 | 5.66 | 38.46 | |||||||||||||
YRS | 31 | 29 | 27 | 31 | 29 | 26 | 30 | 29 | 29 | 26 | 32 | 28 | 12 |