YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1985 | ----- | z | 12.62 | h | 26.38 | c | 38.66 | b | 47.63 | h | 54.58 | d | 60.32 | 58.82 | 47.62 | a | 40.50 | j | 25.52 | j | 17.41 | n | 47.73 | f | ||
1986 | 20.43 | d | 25.96 | b | 33.27 | a | 39.55 | h | 46.10 | k | 55.82 | 57.72 | b | 59.53 | 48.88 | 39.31 | g | 28.87 | k | 16.56 | n | 43.09 | e | |||
1987 | 17.76 | l | 23.47 | m | 26.73 | i | 36.53 | n | ----- | z | 55.60 | 59.66 | b | 57.21 | 49.58 | 44.12 | j | 24.36 | p | 19.67 | m | 55.51 | h | |||
1988 | 14.92 | l | 20.97 | m | 27.95 | k | 39.76 | m | 46.50 | o | 57.55 | a | ----- | z | 59.61 | 50.64 | a | 46.44 | o | 30.00 | o | 14.92 | g | 55.93 | i | |
1989 | 12.88 | f | 19.92 | d | 33.05 | 40.86 | h | 45.75 | k | 52.50 | a | 61.00 | 57.47 | a | 52.27 | 39.08 | f | 29.98 | b | 17.04 | d | 40.40 | d | |||
1990 | 17.46 | d | 23.30 | e | 32.00 | h | 40.75 | b | 45.93 | c | 56.77 | 59.62 | c | 58.23 | a | 54.69 | d | 40.60 | ----- | z | ----- | z | 44.15 | c | ||
1991 | ----- | z | ----- | z | ----- | z | 33.75 | h | 46.25 | e | 54.93 | a | 59.43 | b | 58.72 | a | 51.34 | a | 43.11 | i | 25.87 | d | 15.17 | h | 49.42 | f |
1992 | 15.67 | b | 22.55 | a | 31.54 | c | 41.77 | d | 49.25 | e | 53.05 | a | 56.90 | b | 57.25 | a | 51.35 | d | 42.42 | r | 19.18 | p | 16.36 | b | 39.57 | b |
1993 | 19.04 | c | 20.24 | c | 28.10 | a | 33.38 | a | 46.32 | 52.27 | d | 56.55 | b | 57.24 | d | 47.86 | e | 39.36 | c | 20.42 | d | 16.64 | c | 36.45 | ||
1994 | 17.76 | 19.02 | c | 30.40 | b | 37.43 | a | 47.47 | 54.69 | d | 59.55 | b | 58.50 | d | 49.95 | 39.57 | c | 23.09 | c | 18.37 | d | 37.98 | ||||
1995 | 17.53 | b | 25.92 | b | 28.38 | c | 32.90 | 41.26 | f | 50.48 | d | 55.05 | c | 58.54 | d | 50.57 | g | 34.33 | h | 28.64 | b | 17.45 | a | 34.99 | c | |
1996 | 14.95 | b | 20.54 | a | 25.47 | b | 33.95 | a | 47.54 | d | 53.17 | a | 58.82 | f | 56.73 | k | 46.90 | e | 38.13 | h | 27.15 | d | 17.04 | c | 31.86 | c |
1997 | 16.35 | 17.80 | 28.61 | 31.70 | c | 43.52 | b | 52.88 | e | 57.48 | k | 55.59 | b | 51.86 | b | 39.44 | f | 24.93 | a | 16.04 | c | 33.93 | b | |||
1998 | 19.26 | d | 21.94 | b | 26.76 | b | 35.18 | 46.97 | a | 49.98 | a | 61.00 | d | 57.48 | 53.53 | a | 39.13 | a | 29.11 | b | 18.82 | a | 38.26 | |||
1999 | 21.22 | b | 23.06 | c | 33.38 | a | 34.86 | a | 43.84 | 52.38 | 58.48 | b | 56.97 | a | 47.95 | a | 39.73 | 31.17 | a | 18.10 | b | 38.43 | ||||
2000 | 21.47 | a | 25.14 | a | 30.84 | b | 40.33 | a | 48.58 | a | 53.73 | b | 60.35 | a | 60.48 | 50.74 | a | 41.66 | 18.36 | a | 17.10 | 39.07 | ||||
2001 | 16.12 | b | 23.23 | d | 30.14 | b | 38.92 | 47.52 | 53.42 | e | 62.09 | c | 57.55 | a | 51.47 | a | 40.67 | a | 29.59 | a | 15.94 | 38.89 | ||||
2002 | 14.97 | a | 15.50 | b | 24.79 | c | 41.79 | a | 47.52 | e | 56.90 | a | 62.32 | 57.33 | b | 50.32 | b | 38.33 | a | 22.20 | c | 18.62 | a | 37.55 | ||
2003 | 23.92 | a | 20.16 | c | 28.39 | c | 37.69 | a | 46.39 | 52.35 | d | 61.90 | b | 59.72 | a | 48.14 | a | 44.38 | a | 26.93 | b | 20.28 | a | 39.19 | ||
2004 | 16.84 | b | 20.13 | c | 32.98 | c | 39.45 | 46.63 | 52.37 | 57.24 | 53.96 | c | 49.16 | a | 39.77 | a | 28.59 | a | 17.53 | b | 37.89 | |||||
2005 | 22.48 | 22.13 | b | 28.47 | 36.71 | b | 46.32 | 51.31 | c | 60.21 | 56.07 | b | 51.12 | b | 42.18 | c | ----- | z | ----- | z | 41.70 | b | ||||
2006 | ----- | z | ----- | z | 24.59 | t | 38.80 | t | ----- | z | 55.74 | a | 61.23 | 58.23 | 45.07 | a | 38.18 | a | 26.83 | a | 18.30 | a | 43.37 | e | ||
2007 | 13.08 | a | 22.35 | d | 31.48 | b | 38.66 | a | 46.03 | b | 54.32 | 62.27 | 60.66 | 51.02 | b | 39.29 | 28.75 | 16.23 | a | 38.68 | ||||||
2008 | 12.33 | b | 19.07 | a | 23.29 | 29.94 | c | 43.50 | c | 52.41 | c | 59.74 | d | 57.76 | b | 49.57 | 39.88 | c | 30.60 | f | 18.15 | a | 36.88 | a | ||
2009 | 17.76 | 23.43 | a | 28.81 | b | 33.91 | b | 47.66 | b | 51.00 | d | 57.70 | c | 55.18 | c | 50.43 | b | 37.34 | f | 28.70 | b | 13.58 | e | 37.10 | a | |
2010 | 17.07 | a | 17.73 | 27.42 | a | 36.50 | a | 43.08 | 54.64 | a | 60.16 | 57.09 | d | 51.17 | 41.87 | a | 23.35 | 22.70 | d | 37.73 | ||||||
2011 | 15.60 | a | 16.02 | 28.98 | b | 34.98 | a | 41.18 | 52.72 | a | 60.15 | 58.60 | 50.38 | 38.79 | 25.17 | 17.02 | 36.63 | |||||||||
2012 | 18.02 | 20.10 | 31.87 | a | 40.98 | 47.34 | b | ----- | z | 61.18 | 58.60 | 50.68 | 39.90 | 29.47 | 18.94 | 37.92 | a | |||||||||
2013 | 13.74 | 17.88 | 26.84 | 33.27 | 45.32 | 55.37 | 60.40 | 58.34 | 53.32 | 36.81 | 27.32 | 15.71 | 37.03 | |||||||||||||
2014 | 16.68 | 23.52 | 28.16 | 35.22 | 44.11 | 53.32 | 60.10 | 55.13 | 52.67 | 41.84 | 26.02 | 21.50 | 38.19 | |||||||||||||
2015 | 21.37 | 25.77 | 31.53 | 37.85 | 44.08 | 56.85 | 56.53 | 57.95 | 50.88 | 43.74 | 24.25 | 16.92 | 38.98 | |||||||||||||
2016 | 16.83 | b | 22.36 | 28.97 | 36.62 | 44.63 | 57.07 | 58.60 | 55.45 | 50.22 | 43.19 | 31.48 | 18.34 | 38.65 | ||||||||||||
2017 | 16.94 | 29.38 | 34.40 | 39.40 | 44.19 | 55.12 | 59.79 | 56.48 | 51.17 | 39.53 | 32.48 | 21.73 | 40.05 | |||||||||||||
2018 | 20.26 | 23.84 | 30.19 | 39.27 | 48.67 | a | 55.62 | a | 60.90 | 57.29 | 51.80 | 41.68 | 22.23 | 16.55 | b | 39.03 | ||||||||||
2019 | 16.27 | 20.55 | 34.74 | 43.05 | 45.87 | 54.78 | 62.66 | 61.06 | 52.93 | 33.31 | 26.82 | 16.98 | 39.09 | |||||||||||||
2020 | 18.48 | 18.57 | 31.58 | a | 36.14 | b | 48.63 | 53.63 | 56.55 | b | 60.19 | 50.16 | a | 39.95 | a | 28.03 | 15.93 | b | 38.15 | |||||||
2021 | 19.76 | 21.80 | a | 28.47 | a | 36.86 | e | 46.11 | 56.26 | e | 62.06 | d | 56.57 | a | 51.04 | c | 41.71 | 31.43 | c | 21.61 | 39.47 | |||||
2022 | 14.76 | 16.66 | 25.67 | d | 34.83 | c | 45.55 | 54.02 | 60.80 | a | 59.24 | 53.00 | 39.17 | e | 20.82 | h | 16.71 | b | 38.22 | a | ||||||
2023 | 19.19 | 17.37 | b | 23.56 | 34.00 | c | 47.48 | a | 51.32 | 59.66 | 58.69 | 50.40 | 40.74 | 28.23 | 21.23 | 37.66 | ||||||||||
2024 | 19.35 | 24.21 | 24.21 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.78 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.73 | 21.35 | 29.32 | 36.88 | 46.05 | 53.97 | 59.72 | 57.86 | 50.56 | 40.18 | 26.89 | 17.92 | 38.32 | |||||||||||||
S.D. | 2.68 | 3.18 | 2.99 | 3.17 | 1.89 | 1.96 | 1.91 | 1.62 | 1.94 | 2.19 | 3.41 | 2.08 | 0.91 | |||||||||||||
SKEW | 0.19 | 0.21 | -0.11 | -0.03 | -0.50 | -0.05 | -0.60 | -0.19 | -0.51 | -0.75 | -0.60 | 0.65 | -0.35 | |||||||||||||
MAX | 23.92 | 29.38 | 34.74 | 43.05 | 49.25 | 57.55 | 62.66 | 61.06 | 54.69 | 44.38 | 32.48 | 22.70 | 40.05 | |||||||||||||
MIN | 12.33 | 15.50 | 23.29 | 29.94 | 41.18 | 49.98 | 55.05 | 53.96 | 45.07 | 33.31 | 18.36 | 13.58 | 36.45 | |||||||||||||
YRS | 34 | 35 | 34 | 33 | 32 | 38 | 36 | 38 | 38 | 28 | 30 | 32 | 22 |