YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1989 | ----- | z | ----- | z | ----- | z | ----- | z | 42.00 | 46.93 | a | 56.97 | 50.50 | l | 44.29 | k | 33.60 | b | 21.50 | a | 10.21 | c | 35.20 | f | ||
1990 | 10.28 | h | 14.78 | a | 25.02 | 35.74 | a | 41.45 | a | 52.47 | 55.15 | 52.89 | 50.63 | 34.97 | 23.85 | 8.77 | 35.97 | a | ||||||||
1991 | 10.87 | 15.50 | 21.47 | a | 29.27 | 42.60 | 51.25 | 54.32 | 53.53 | 46.20 | 35.50 | 19.93 | 9.50 | 32.49 | ||||||||||||
1992 | 8.93 | a | 15.36 | a | 25.18 | 36.68 | 44.90 | e | 48.97 | 52.48 | ----- | z | 45.55 | 37.45 | b | 16.64 | e | 10.20 | d | 31.12 | a | |||||
1993 | 12.81 | b | 15.89 | e | 25.44 | g | 30.36 | b | 43.45 | 48.98 | a | 53.60 | a | 52.29 | 43.30 | 34.77 | c | 16.25 | b | 9.48 | h | 35.17 | b | |||
1994 | 13.12 | g | 12.43 | f | 24.57 | j | 32.48 | c | 45.79 | c | 53.11 | c | 53.95 | c | 54.95 | b | 45.33 | 36.87 | a | 20.96 | d | 13.36 | i | 42.93 | d | |
1995 | 13.19 | d | 23.85 | a | 26.40 | 32.45 | a | 42.02 | f | 49.36 | b | ----- | z | 57.13 | a | 47.62 | a | 36.15 | 28.20 | 15.63 | 33.00 | b | ||||
1996 | 13.65 | a | 17.34 | 22.82 | 33.59 | b | 47.67 | e | 52.29 | a | 57.21 | 54.00 | 45.58 | 36.10 | 23.38 | i | 18.50 | 36.25 | a | |||||||
1997 | 14.72 | a | 14.52 | 27.11 | 29.74 | c | 45.50 | y | 51.83 | g | 55.65 | a | 54.40 | 50.70 | c | 37.40 | 22.16 | b | 11.24 | 31.77 | b | |||||
1998 | 16.22 | a | 17.62 | 24.58 | 32.29 | i | 44.96 | f | 49.07 | 57.90 | 55.50 | s | 50.98 | d | 38.07 | b | 27.60 | 18.17 | a | 33.36 | c | |||||
1999 | 18.40 | a | 20.94 | a | 30.24 | d | 31.76 | e | 46.69 | r | 49.55 | b | 57.65 | 55.93 | a | 46.20 | 36.97 | 30.08 | 15.35 | 35.73 | a | |||||
2000 | 17.80 | a | 21.38 | 25.40 | 38.79 | a | 48.02 | k | 52.57 | 57.42 | a | 56.82 | 49.43 | 38.72 | d | 15.74 | a | 12.21 | 35.12 | a | ||||||
2001 | 11.24 | 19.80 | 27.50 | a | 37.06 | e | 45.41 | d | 53.05 | 58.60 | a | 55.63 | 48.34 | a | 39.11 | 28.82 | 12.56 | 36.43 | ||||||||
2002 | 12.21 | 11.61 | a | 21.65 | 39.70 | 43.09 | b | 54.38 | 58.87 | a | 54.42 | 48.23 | 35.71 | 20.58 | 14.61 | 34.59 | ||||||||||
2003 | 21.35 | a | 17.26 | a | 27.40 | a | 34.37 | 44.71 | 50.28 | 58.56 | 57.22 | b | 47.27 | 43.37 | 25.83 | 17.02 | 37.05 | |||||||||
2004 | 15.19 | 15.83 | b | 32.16 | 38.47 | 45.35 | a | 50.55 | a | 55.44 | 52.32 | 47.45 | 39.48 | 27.12 | 15.42 | 36.23 | ||||||||||
2005 | 19.95 | a | 19.29 | 24.24 | b | 35.16 | b | 44.98 | c | 50.55 | 57.26 | 54.42 | a | 49.22 | a | 39.88 | b | 25.10 | a | 13.94 | 36.17 | |||||
2006 | 14.40 | 14.69 | a | 23.45 | 38.52 | c | 46.10 | b | 53.67 | d | 58.94 | 55.68 | 43.65 | c | 35.26 | b | 24.47 | 16.57 | c | 35.45 | ||||||
2007 | 9.37 | a | 19.41 | 29.00 | 37.47 | a | 43.43 | d | 53.05 | 58.52 | g | 57.77 | 49.27 | 39.89 | 28.53 | 13.94 | 34.65 | a | ||||||||
2008 | 9.85 | 17.37 | b | 19.18 | 29.98 | 41.54 | g | 50.52 | b | 56.67 | e | 54.37 | 46.55 | a | 38.42 | 28.82 | 16.13 | 33.44 | a | |||||||
2009 | 18.61 | 20.37 | a | 26.47 | 33.34 | a | 46.83 | a | 50.09 | b | 55.68 | 53.39 | 48.28 | 35.06 | 27.38 | 10.79 | 35.53 | |||||||||
2010 | 14.32 | 14.52 | 26.18 | 35.48 | 42.05 | 53.12 | 58.29 | 56.42 | 49.05 | 41.40 | 23.12 | 22.60 | 36.38 | |||||||||||||
2011 | 13.90 | 13.20 | 27.03 | 34.89 | b | 43.24 | 51.45 | 58.31 | b | 56.50 | d | 47.69 | c | 36.70 | d | 24.26 | c | 14.72 | d | 35.16 | ||||||
2012 | 17.07 | d | 17.64 | a | 31.71 | 39.78 | a | 45.63 | 55.71 | a | 58.73 | a | 57.58 | g | 48.89 | l | 38.64 | b | 29.37 | 14.21 | c | 34.85 | b | |||
2013 | 8.85 | 13.96 | 24.55 | c | 32.52 | 42.89 | d | 53.54 | b | 58.42 | a | 55.58 | 50.45 | b | 36.60 | a | 26.02 | c | 13.40 | b | 34.73 | |||||
2014 | 14.84 | c | 19.25 | f | 24.43 | a | 33.30 | b | 44.02 | a | 51.29 | a | 58.34 | f | 53.67 | b | 50.85 | c | 40.12 | f | 24.23 | h | 17.42 | a | 36.23 | d |
2015 | 20.77 | c | 23.76 | e | 30.62 | a | 36.57 | a | 42.81 | b | 55.62 | a | 56.23 | c | 55.73 | a | 49.55 | b | 41.37 | a | 21.85 | d | 13.44 | d | 37.36 | |
2016 | 13.14 | f | 19.24 | b | 25.67 | d | 36.37 | 43.17 | h | 56.16 | b | 57.62 | b | 53.74 | 48.06 | d | 40.98 | g | 32.23 | d | 16.14 | f | 41.14 | d | ||
2017 | 13.56 | e | 26.75 | d | 33.48 | a | 37.21 | a | 43.43 | a | 53.91 | b | 58.97 | a | 53.76 | 48.54 | b | 37.89 | c | 32.57 | b | 19.84 | b | 38.33 | ||
2018 | 17.95 | b | 21.91 | a | 26.27 | a | 38.07 | b | 47.17 | e | 54.71 | a | 58.73 | c | 55.29 | b | 49.57 | b | 38.88 | a | 21.34 | e | 10.50 | h | 39.08 | a |
2019 | 13.54 | g | 14.83 | d | 23.91 | d | 36.59 | b | 41.30 | h | 51.02 | c | 58.25 | c | 57.37 | 51.15 | c | 31.13 | a | 24.84 | b | 13.08 | e | 36.22 | b | |
2020 | 15.09 | d | 14.80 | d | 28.02 | j | ----- | z | 49.33 | s | 53.40 | j | 57.66 | c | 56.63 | l | 47.76 | e | 38.50 | g | 26.77 | h | 12.34 | i | 33.83 | h |
2021 | 13.43 | c | 18.42 | d | 22.54 | g | 32.63 | g | 44.05 | j | 55.63 | c | 59.73 | e | 56.52 | e | 51.76 | g | 39.33 | e | 33.17 | d | 21.57 | k | 39.46 | e |
2022 | 7.65 | n | 13.07 | f | 23.57 | i | 33.75 | j | 44.17 | k | 53.42 | f | 59.43 | j | 56.45 | b | 51.75 | 37.21 | 20.85 | 14.17 | a | 36.08 | g | |||
2023 | 15.18 | 14.21 | d | 19.89 | 32.11 | b | 46.63 | 49.98 | a | 57.92 | 56.56 | 49.43 | 38.40 | 27.57 | 16.60 | 35.37 | ||||||||||
2024 | 14.71 | 18.86 | a | 27.56 | f | 35.70 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.78 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 14.61 | 17.65 | 25.97 | 34.93 | 44.40 | 51.96 | 57.13 | 55.16 | 48.24 | 37.51 | 24.90 | 14.49 | 35.80 | |||||||||||||
S.D. | 3.37 | 3.48 | 3.47 | 3.06 | 1.77 | 2.34 | 1.81 | 1.56 | 2.15 | 2.45 | 4.61 | 3.19 | 1.41 | |||||||||||||
SKEW | 0.14 | 0.65 | 0.25 | -0.23 | 0.17 | 0.04 | -0.94 | -0.16 | -0.49 | -0.07 | -0.18 | 0.32 | -0.50 | |||||||||||||
MAX | 21.35 | 26.75 | 33.48 | 39.78 | 47.67 | 56.16 | 59.73 | 57.77 | 51.75 | 43.37 | 33.17 | 22.60 | 38.33 | |||||||||||||
MIN | 8.85 | 11.61 | 19.18 | 29.27 | 41.45 | 46.93 | 52.48 | 52.29 | 43.30 | 31.13 | 15.74 | 8.77 | 32.49 | |||||||||||||
YRS | 30 | 32 | 29 | 30 | 24 | 32 | 31 | 30 | 32 | 32 | 32 | 29 | 14 |