YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.69 | 63.84 | b | 56.82 | 43.71 | b | 37.38 | a | 31.24 | 49.95 | f | |||
1982 | 18.58 | 27.39 | 35.31 | 41.62 | b | 49.47 | 55.47 | 63.44 | 64.27 | a | 55.65 | 41.48 | a | 31.30 | 23.83 | b | 42.32 | |||||||||
1983 | 25.10 | 32.59 | a | 36.62 | a | 37.12 | b | 48.52 | 57.28 | a | 64.02 | a | 63.98 | 58.68 | 46.68 | 36.97 | a | 29.72 | b | 44.77 | ||||||
1984 | 24.58 | a | 27.71 | a | 34.77 | 38.75 | b | 55.68 | 56.00 | x | 66.11 | m | 64.48 | a | 57.32 | 40.62 | c | 35.21 | p | 25.00 | f | 42.99 | d | |||
1985 | 20.11 | d | 23.50 | a | 33.87 | d | 44.90 | a | 52.00 | 60.66 | b | ----- | z | 64.83 | p | 52.33 | 44.89 | 31.37 | 23.50 | a | 38.71 | b | ||||
1986 | 30.73 | a | 31.48 | 39.97 | 42.61 | b | 51.02 | 61.38 | 64.08 | 66.45 | 51.97 | a | 43.37 | 35.28 | a | 26.18 | a | 45.38 | ||||||||
1987 | 21.76 | 28.18 | 32.66 | 45.48 | 51.22 | a | 60.65 | 62.84 | 62.77 | 54.98 | a | 48.26 | 32.98 | a | 21.60 | a | 43.62 | |||||||||
1988 | 20.17 | a | 29.38 | 33.13 | 44.86 | h | 50.08 | 62.78 | 67.16 | 64.77 | 53.92 | 49.98 | 33.71 | a | 22.97 | 44.37 | a | |||||||||
1989 | 12.42 | 23.11 | 40.11 | 48.40 | 51.69 | 58.23 | 67.48 | 62.40 | a | 55.20 | 45.32 | 34.88 | 24.23 | 43.62 | ||||||||||||
1990 | 24.52 | a | 27.18 | 39.06 | 46.52 | 50.05 | 61.47 | 67.15 | 63.98 | 60.38 | 47.17 | m | 32.88 | i | 17.13 | 45.74 | b | |||||||||
1991 | 17.52 | 31.84 | 32.62 | c | 39.68 | 48.02 | b | 57.80 | 65.85 | 64.90 | 57.12 | 46.45 | b | 32.48 | 25.78 | a | 43.34 | |||||||||
1992 | 21.55 | 34.02 | 38.23 | 48.67 | 53.97 | 59.07 | 63.98 | 64.10 | ----- | z | 48.66 | b | 29.77 | 20.24 | b | 43.84 | a | |||||||||
1993 | 25.97 | 27.82 | 37.53 | 43.22 | 52.53 | 57.72 | a | 63.15 | 62.68 | 54.98 | 45.34 | 30.57 | b | 24.77 | 43.86 | |||||||||||
1994 | 27.06 | 26.32 | 38.61 | 43.17 | 52.77 | 64.05 | 67.76 | 67.44 | 58.12 | a | 44.02 | a | 27.00 | 26.71 | 45.25 | |||||||||||
1995 | 27.11 | 37.54 | 38.37 | 40.52 | 47.60 | 55.25 | 63.60 | 66.06 | 58.15 | 44.57 | b | 38.28 | 29.02 | 45.51 | ||||||||||||
1996 | 27.08 | a | 33.93 | 36.81 | 42.90 | 53.45 | 61.25 | 68.32 | 65.08 | a | 54.92 | 43.87 | a | 35.22 | 27.34 | 45.85 | ||||||||||
1997 | 24.21 | 27.25 | 38.66 | 40.08 | 53.57 | a | 60.33 | 64.42 | 64.19 | 59.18 | 45.03 | a | 36.59 | a | 24.74 | 44.86 | ||||||||||
1998 | 29.74 | 28.20 | a | 35.61 | 40.60 | 49.92 | 55.48 | 68.35 | 66.65 | 57.65 | 44.29 | 35.57 | 24.53 | 44.72 | ||||||||||||
1999 | 29.85 | 32.89 | 39.69 | 38.18 | 49.29 | 59.00 | a | 67.19 | 63.68 | 55.72 | 46.87 | 37.93 | b | 26.87 | 45.60 | |||||||||||
2000 | 28.54 | c | 35.14 | 36.21 | b | 47.28 | 54.43 | a | 63.13 | 66.74 | 66.71 | 57.00 | b | 46.45 | a | 27.85 | 30.15 | 46.64 | ||||||||
2001 | 23.84 | 31.19 | a | 36.35 | a | 42.70 | b | 56.87 | a | 60.94 | d | 66.27 | a | 66.94 | d | 59.30 | b | 48.18 | 38.19 | c | 22.02 | g | 48.25 | a | ||
2002 | 22.37 | d | 25.98 | c | 31.31 | b | 46.74 | a | 50.82 | a | 60.78 | a | 68.15 | a | 64.48 | a | 56.47 | a | 43.22 | a | 31.66 | b | ----- | z | 45.63 | a |
2003 | 28.84 | 28.12 | 33.92 | f | 39.90 | 52.74 | 62.50 | 69.39 | 65.80 | a | 55.68 | 51.35 | 34.25 | 27.09 | b | 46.88 | a | |||||||||
2004 | 18.82 | 24.88 | 42.02 | 46.57 | 54.29 | 62.48 | 66.23 | 64.38 | a | 55.09 | a | 44.03 | a | 33.19 | a | 27.46 | d | 44.95 | ||||||||
2005 | 31.47 | b | 33.57 | a | 36.29 | 40.69 | c | 51.69 | 55.05 | a | ----- | z | 62.23 | a | 54.29 | b | 46.48 | d | 35.84 | b | 26.56 | f | 44.76 | b | ||
2006 | ----- | z | 28.25 | ----- | z | 44.16 | a | 52.20 | c | 60.67 | a | 67.20 | c | 63.08 | a | 51.32 | 44.65 | a | 36.14 | a | 19.12 | e | 46.68 | b | ||
2007 | 15.70 | d | 31.37 | e | 38.82 | c | 44.39 | g | 52.13 | a | 58.83 | 67.68 | 65.25 | a | 55.62 | a | 43.60 | a | 36.79 | a | 22.29 | b | 44.37 | a | ||
2008 | 17.63 | d | ----- | z | 34.48 | a | 38.17 | d | 48.05 | b | 57.60 | a | 65.66 | 64.28 | a | 55.43 | 45.52 | 37.69 | a | 22.04 | e | 44.23 | a | |||
2009 | 24.22 | d | 30.44 | d | 34.35 | d | ----- | z | 54.76 | f | 55.79 | d | 66.18 | 62.59 | b | 56.77 | b | 40.24 | h | 35.87 | d | 14.84 | f | 45.77 | d | |
2010 | 18.33 | h | 23.18 | h | 32.64 | c | 35.14 | w | 44.44 | f | ----- | z | 64.76 | f | 62.38 | b | 55.32 | e | 46.14 | c | 30.93 | c | 32.63 | l | 45.48 | g |
2011 | 23.15 | g | 25.70 | h | 36.67 | b | 41.33 | a | 44.34 | f | 56.39 | h | 64.29 | b | 65.06 | 56.45 | 45.57 | b | 32.98 | c | 22.81 | e | 45.65 | d | ||
2012 | 28.84 | l | 28.19 | h | 37.16 | f | 44.48 | a | 52.27 | t | 64.33 | 66.77 | 67.33 | m | ----- | z | ----- | z | ----- | z | ----- | z | 58.53 | i | ||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.92 | ----- | z | ----- | z | ----- | z | ----- | z | 35.32 | b | 17.66 | b | 37.96 | i | |
2014 | 26.30 | c | 32.48 | a | 34.54 | e | 42.74 | a | 42.93 | x | 61.39 | p | 68.00 | 61.43 | b | 57.85 | 47.90 | 32.08 | e | ----- | z | 44.81 | c | |||
2015 | 31.15 | ----- | z | 37.85 | 39.93 | c | 49.78 | f | 62.58 | d | 62.82 | q | 64.93 | j | 59.23 | f | 49.46 | d | ----- | z | ----- | z | 44.19 | g | ||
2016 | 17.57 | p | 26.89 | g | 38.60 | g | 39.68 | p | 49.37 | a | 62.73 | 65.34 | 62.05 | 54.25 | 48.23 | 37.18 | 23.47 | 50.33 | d | |||||||
2017 | 24.06 | 35.45 | 40.65 | 42.97 | 50.87 | 62.45 | 67.74 | 64.37 | 54.42 | 44.52 | 40.02 | 28.26 | 46.31 | |||||||||||||
2018 | 30.02 | 27.93 | 36.08 | 45.40 | 51.21 | 63.33 | 68.15 | 65.79 | 58.02 | 44.34 | 32.35 | 20.92 | 45.29 | |||||||||||||
2019 | 21.56 | 22.70 | a | 36.89 | 44.20 | 45.19 | 57.05 | 64.29 | 63.95 | 57.35 | 38.16 | 34.83 | a | 25.70 | a | 42.66 | ||||||||||
2020 | 25.71 | 28.00 | 37.06 | 42.52 | 53.27 | 58.63 | 64.11 | 66.37 | 55.85 | 47.15 | 33.90 | 22.03 | 44.55 | |||||||||||||
2021 | 23.03 | 28.38 | 33.61 | 42.27 | 50.23 | 63.86 | a | 68.76 | 63.32 | 58.70 | 43.69 | 38.32 | 27.35 | 45.13 | ||||||||||||
2022 | 24.61 | 25.02 | 35.19 | 42.06 | c | 51.02 | ----- | z | 67.81 | 65.63 | 59.98 | a | 45.05 | 28.02 | 23.65 | 42.55 | a | |||||||||
2023 | 22.26 | 24.25 | 29.94 | 39.30 | 51.48 | 55.65 | 67.06 | 63.92 | 55.87 | 45.79 | 34.13 | 28.48 | 43.18 | |||||||||||||
2024 | 26.61 | d | 31.84 | 35.94 | 38.06 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.46 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.18 | 29.31 | 36.28 | 42.66 | 51.33 | 59.92 | 66.25 | 64.40 | 56.26 | 45.46 | 34.23 | 24.67 | 44.64 | |||||||||||||
S.D. | 4.54 | 3.73 | 2.72 | 2.98 | 2.40 | 2.81 | 1.81 | 1.50 | 2.09 | 2.53 | 3.15 | 3.47 | 1.17 | |||||||||||||
SKEW | -0.45 | 0.17 | -0.14 | 0.21 | -0.10 | -0.27 | -0.34 | 0.09 | -0.22 | -0.22 | -0.45 | -0.24 | -0.35 | |||||||||||||
MAX | 31.47 | 37.54 | 42.02 | 48.67 | 56.87 | 64.33 | 69.39 | 67.44 | 60.38 | 51.35 | 40.02 | 31.24 | 46.64 | |||||||||||||
MIN | 12.42 | 22.70 | 29.94 | 37.13 | 45.19 | 55.05 | 62.84 | 61.43 | 51.32 | 38.16 | 27.00 | 17.13 | 42.32 | |||||||||||||
YRS | 37 | 36 | 38 | 36 | 35 | 37 | 37 | 39 | 39 | 39 | 39 | 34 | 21 |