YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1988 | ----- | z | ----- | z | ----- | z | ----- | z | 38.83 | a | 46.39 | b | 54.65 | k | 53.00 | e | 43.38 | d | 39.19 | 31.32 | e | 17.74 | d | 38.55 | e | |
1989 | 15.07 | d | 21.57 | 30.39 | c | 36.64 | b | 39.29 | c | 46.64 | e | 53.80 | a | 49.23 | 44.43 | 34.26 | 26.17 | 21.10 | b | 34.88 | ||||||
1990 | 19.13 | a | 15.43 | 28.42 | 35.48 | a | 38.23 | 47.29 | b | 52.69 | e | 50.03 | b | 46.28 | e | 37.27 | a | 25.55 | h | 15.62 | j | 37.02 | b | |||
1991 | 17.78 | h | 25.71 | d | 21.75 | c | 28.88 | e | ----- | z | 44.48 | a | 54.58 | 53.24 | f | 45.69 | d | 37.93 | d | 29.43 | g | 20.32 | f | 37.00 | e | |
1992 | 15.64 | c | 25.38 | c | 29.66 | b | 37.50 | d | 43.50 | a | 45.38 | d | 50.92 | e | 53.00 | g | 45.57 | b | 39.00 | c | 24.48 | e | 16.78 | d | 33.98 | a |
1993 | 15.62 | j | 18.54 | d | 28.53 | a | 33.19 | c | 41.16 | f | 43.36 | h | 49.77 | a | 49.46 | e | ----- | z | 33.12 | o | 23.30 | g | 19.17 | h | 35.90 | g |
1994 | 20.45 | b | 19.46 | b | 30.03 | b | 33.96 | b | 40.58 | 49.32 | e | 54.77 | e | 53.97 | a | 45.18 | b | 34.00 | 19.84 | e | 20.27 | a | 35.15 | |||
1995 | 22.57 | a | 24.50 | 26.00 | b | 31.43 | 36.46 | c | 42.41 | a | 51.57 | a | 51.71 | c | 46.07 | b | 36.33 | a | 31.81 | c | 24.43 | c | 35.44 | |||
1996 | 24.89 | c | 25.71 | a | 27.27 | a | 32.08 | d | 41.21 | c | 46.11 | b | 54.93 | a | 51.90 | b | 44.04 | b | 35.23 | 27.38 | a | 26.33 | d | 36.42 | ||
1997 | 19.25 | c | 22.30 | a | 30.55 | b | 31.54 | f | 42.13 | a | 47.11 | b | 50.14 | b | 51.03 | 45.44 | e | 34.37 | a | ----- | z | 18.27 | e | 36.06 | b | |
1998 | 21.63 | d | 18.82 | f | 24.92 | e | 29.17 | 34.82 | c | ----- | z | 52.97 | 53.61 | c | 46.52 | a | 33.27 | e | 29.54 | f | 18.52 | f | 37.11 | d | ||
1999 | 21.79 | b | 22.24 | c | ----- | z | 28.24 | e | 39.27 | a | 47.44 | c | 52.76 | b | 49.96 | c | 45.93 | a | 37.19 | 31.72 | a | 21.04 | c | 36.14 | a | |
2000 | 25.86 | b | 25.97 | 27.39 | 33.10 | 43.10 | 48.47 | 51.77 | a | 52.07 | b | 44.07 | a | 35.33 | a | 22.59 | c | 23.34 | b | 36.09 | ||||||
2001 | 16.55 | 18.89 | 29.17 | a | 30.70 | 43.93 | a | 50.57 | 52.90 | 53.97 | 48.18 | b | 39.55 | 29.61 | b | 21.11 | d | 36.26 | ||||||||
2002 | 19.63 | a | 23.36 | 24.07 | a | 33.24 | a | 37.80 | a | 48.96 | b | 56.07 | a | 50.90 | 45.43 | b | 33.74 | 28.23 | 21.81 | e | 35.27 | |||||
2003 | 21.10 | 21.78 | a | 28.03 | 30.11 | c | 39.13 | a | 49.00 | 55.45 | 52.83 | b | 46.22 | c | 39.38 | b | 25.10 | 21.83 | a | 35.83 | ||||||
2004 | 19.86 | c | 20.00 | a | 30.57 | c | 34.50 | d | 39.28 | f | 47.21 | a | 53.00 | c | 49.10 | 41.57 | b | 33.83 | b | 24.52 | a | 21.81 | 34.18 | a | ||
2005 | 17.03 | a | 22.54 | 24.94 | 29.36 | b | 40.30 | a | 44.20 | 56.32 | 52.35 | 42.03 | 36.21 | c | 29.59 | c | 25.48 | d | 35.03 | |||||||
2006 | 18.15 | d | 20.22 | e | 25.16 | f | 32.03 | 41.10 | 49.77 | 56.48 | 49.94 | 43.87 | 33.30 | a | 28.72 | e | 20.61 | 35.83 | a | |||||||
2007 | 15.33 | d | 24.35 | b | 30.77 | e | 33.97 | 40.55 | 47.82 | b | 56.97 | 53.67 | a | 44.72 | a | 35.46 | c | 30.74 | g | 21.36 | f | 38.36 | b | |||
2008 | 17.74 | d | 18.07 | a | 25.57 | c | 33.75 | b | 38.42 | 46.67 | 55.16 | 54.43 | a | 44.70 | 33.97 | b | 30.07 | a | 19.43 | a | 34.83 | |||||
2009 | 21.56 | d | 22.48 | c | 25.81 | 30.40 | 43.77 | 45.53 | 54.13 | 50.48 | 47.30 | 33.58 | 27.03 | 17.41 | d | 34.96 | ||||||||||
2010 | 20.58 | 23.00 | 25.19 | 28.33 | 33.94 | 48.43 | 54.07 | b | 51.06 | 44.30 | 38.55 | 27.00 | c | 26.92 | f | 35.86 | a | |||||||||
2011 | 18.62 | b | 19.25 | 27.04 | c | 30.73 | 34.40 | a | 44.74 | c | 51.80 | a | 53.60 | a | 49.73 | 37.87 | 26.63 | 17.67 | a | 34.34 | ||||||
2012 | 22.53 | a | 21.62 | 27.81 | 38.67 | 40.39 | 47.40 | 54.23 | a | 54.68 | 48.90 | 37.97 | 29.87 | 23.19 | 37.27 | |||||||||||
2013 | 13.81 | 20.57 | 30.19 | 33.67 | 40.06 | 49.90 | 55.26 | 51.06 | 44.73 | 31.29 | 28.40 | 19.00 | 34.83 | |||||||||||||
2014 | 22.68 | 27.11 | 28.10 | 33.57 | 40.32 | 48.57 | 55.37 | a | 51.23 | 47.40 | 38.87 | 30.37 | 25.13 | a | 37.39 | |||||||||||
2015 | 25.61 | 29.11 | 31.68 | 31.60 | 38.68 | 50.90 | 51.94 | 53.23 | 47.70 | 40.19 | 24.43 | 21.52 | 37.21 | |||||||||||||
2016 | 23.00 | 26.03 | 30.90 | 34.87 | 38.13 | 50.43 | 52.19 | 51.65 | 43.37 | 36.68 | 28.83 | 24.23 | 36.69 | |||||||||||||
2017 | 18.94 | 25.75 | 29.48 | 33.30 | 40.45 | 49.00 | 55.06 | 54.29 | 44.33 | 32.81 | 34.03 | 22.65 | 36.67 | |||||||||||||
2018 | 27.30 | a | 20.21 | 26.10 | 34.82 | b | 40.94 | 48.93 | 56.71 | 52.45 | 46.20 | 34.55 | 27.53 | 22.68 | 36.54 | |||||||||||
2019 | 23.23 | 18.93 | 25.81 | 35.17 | 36.74 | 46.43 | 52.87 | 53.19 | 44.47 | 30.94 | 27.47 | 24.48 | 34.98 | |||||||||||||
2020 | 25.48 | 23.17 | 26.00 | 33.27 | 40.45 | 45.67 | 52.74 | 53.19 | 46.60 | 35.74 | 26.67 | 22.03 | 35.92 | |||||||||||||
2021 | 21.74 | 20.54 | 25.16 | 32.40 | 39.47 | a | 51.13 | 56.87 | 52.97 | 46.80 | 34.13 | 31.55 | a | 22.58 | 36.28 | |||||||||||
2022 | 19.90 | a | 20.57 | 28.34 | b | 31.72 | e | 36.43 | c | 48.28 | a | 56.16 | 54.70 | d | 49.28 | a | 35.65 | 21.77 | d | 22.03 | a | 35.40 | ||||
2023 | 14.84 | 13.14 | 18.65 | 29.31 | a | 39.48 | 44.43 | 55.45 | 52.06 | 45.37 | 36.29 | 27.67 | 25.74 | 33.54 | ||||||||||||
2024 | 23.65 | 21.48 | 25.84 | 31.33 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.66 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.45 | 21.97 | 27.36 | 32.62 | 39.46 | 47.50 | 53.94 | 52.15 | 45.59 | 35.83 | 27.68 | 21.72 | 35.72 | |||||||||||||
S.D. | 3.46 | 3.33 | 2.81 | 2.59 | 2.51 | 2.13 | 1.97 | 1.65 | 1.87 | 2.42 | 3.19 | 2.60 | 0.99 | |||||||||||||
SKEW | -0.05 | -0.26 | -0.85 | 0.19 | -0.33 | -0.27 | -0.27 | -0.23 | 0.21 | 0.01 | -0.41 | -0.18 | -0.07 | |||||||||||||
MAX | 27.30 | 29.11 | 31.68 | 38.67 | 43.93 | 51.13 | 56.97 | 54.70 | 49.73 | 40.19 | 34.03 | 26.33 | 37.39 | |||||||||||||
MIN | 13.81 | 13.14 | 18.65 | 28.24 | 33.94 | 42.41 | 49.77 | 49.10 | 41.57 | 30.94 | 19.84 | 16.78 | 33.54 | |||||||||||||
YRS | 34 | 35 | 34 | 34 | 33 | 34 | 35 | 34 | 35 | 35 | 30 | 30 | 24 |