YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.05 | l | 52.40 | a | 38.43 | 32.07 | a | 24.60 | 16.48 | b | 32.80 | g | ||
1987 | 11.37 | d | 15.82 | 19.42 | 31.60 | 38.03 | 46.86 | b | 49.84 | 48.55 | 42.76 | a | 36.76 | b | 23.43 | 12.25 | c | 31.39 | ||||||||
1988 | 10.67 | a | 17.97 | 19.47 | a | 29.66 | a | 34.50 | c | 47.67 | 53.52 | 50.73 | a | 40.11 | b | 37.41 | d | 22.00 | 13.03 | a | 31.39 | |||||
1989 | 8.50 | a | 13.25 | 26.67 | a | 34.24 | a | 36.14 | c | 43.67 | 53.35 | 48.61 | 42.54 | b | 31.30 | a | 25.97 | a | 18.47 | a | 31.89 | |||||
1990 | 13.65 | 15.89 | a | 26.60 | a | 33.15 | c | 35.80 | a | 44.52 | a | 51.41 | b | 50.58 | 47.14 | b | 31.73 | a | 23.61 | b | 7.82 | c | 31.82 | |||
1991 | 8.20 | a | 20.89 | 19.39 | 25.63 | 34.07 | a | 43.48 | a | 51.27 | a | 51.26 | 42.53 | 35.32 | 20.70 | 13.68 | 30.54 | |||||||||
1992 | 14.00 | a | 19.17 | 25.71 | 35.21 | b | 40.48 | 44.33 | 49.50 | a | 51.27 | a | 42.97 | 37.38 | b | 18.04 | d | 9.32 | c | 32.28 | ||||||
1993 | 14.83 | a | 16.33 | a | 25.97 | a | 28.17 | a | 38.87 | 42.00 | 49.03 | 48.93 | b | 40.07 | a | 32.97 | b | 17.41 | a | 14.26 | 30.74 | |||||
1994 | 18.45 | 13.14 | 26.32 | 31.20 | 38.10 | a | 49.07 | a | 53.77 | a | 54.53 | a | 45.73 | d | 33.00 | d | 15.24 | e | 14.31 | b | 32.74 | |||||
1995 | 16.03 | 26.88 | d | 24.68 | 27.55 | a | 34.53 | a | 41.23 | 49.52 | b | 52.17 | b | 43.48 | a | 30.74 | 26.97 | a | 19.90 | 32.81 | ||||||
1996 | 16.50 | a | 21.34 | 23.87 | 29.25 | b | 39.48 | 46.33 | 54.29 | 51.93 | a | 41.57 | 30.03 | b | 22.64 | b | 15.97 | a | 32.77 | |||||||
1997 | 15.92 | e | 15.00 | a | 25.03 | 25.38 | d | 39.17 | a | 46.70 | 49.60 | a | 51.30 | a | 44.28 | a | 32.20 | a | 23.33 | 13.68 | 31.80 | |||||
1998 | 17.41 | b | 16.64 | c | 20.13 | a | 27.43 | 34.84 | 40.25 | b | 53.71 | 51.10 | a | 44.53 | 32.45 | 23.26 | c | 15.80 | a | 31.46 | ||||||
1999 | 20.67 | a | 17.48 | c | 26.52 | d | 25.32 | e | 34.83 | a | 42.18 | b | 52.97 | 48.93 | b | 40.96 | d | 33.79 | b | 25.60 | 16.28 | f | 33.57 | a | ||
2000 | 19.86 | c | 21.72 | d | 21.84 | 32.68 | b | 39.73 | e | 46.61 | b | 52.79 | b | 53.15 | d | 43.08 | d | 31.50 | a | 15.34 | a | 18.87 | a | 33.10 | ||
2001 | 13.43 | c | 17.19 | b | 25.97 | a | 23.82 | b | 31.48 | 36.03 | 38.69 | e | 45.04 | c | 39.21 | b | 34.83 | b | 24.31 | a | 11.10 | a | 28.43 | |||
2002 | 11.90 | 12.46 | d | 14.45 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.20 | y | 28.60 | p | 22.17 | a | 14.33 | a | 15.22 | h | |
2003 | 20.95 | l | 16.19 | a | 23.71 | c | 27.12 | e | 38.75 | c | 44.80 | 56.07 | a | 51.28 | b | 40.31 | d | 36.18 | c | 19.59 | c | 14.21 | b | 33.47 | a | |
2004 | 10.57 | a | 10.95 | i | 29.04 | e | 30.79 | b | 37.20 | a | 44.10 | a | 50.50 | s | 49.26 | 40.97 | 33.16 | f | 23.43 | 13.33 | y | 33.17 | d | |||
2005 | 20.68 | 19.14 | 23.45 | 30.67 | 40.74 | 42.60 | 54.77 | 50.06 | 42.87 | 34.55 | 26.47 | 17.00 | 33.58 | |||||||||||||
2006 | 15.97 | 16.67 | g | 20.06 | 30.70 | 38.90 | 47.93 | ----- | z | 49.94 | 39.83 | 32.74 | 23.17 | f | 15.77 | 32.43 | c | |||||||||
2007 | 10.79 | c | 21.86 | 24.84 | 32.53 | 38.48 | 48.03 | a | 56.03 | 53.61 | 42.47 | 31.65 | 24.87 | 12.90 | 33.17 | |||||||||||
2008 | 9.97 | 17.32 | a | 22.19 | 25.80 | 33.58 | 40.58 | k | 54.06 | 53.13 | 42.30 | 33.52 | 28.23 | 15.13 | 30.48 | a | ||||||||||
2009 | 18.68 | 18.86 | 23.06 | 28.77 | 39.65 | 43.37 | 54.29 | 49.65 | 45.27 | 28.61 | 22.57 | 9.81 | 31.88 | |||||||||||||
2010 | 15.00 | 16.54 | 21.48 | 28.27 | 33.35 | 46.00 | 53.42 | 49.00 | g | 43.70 | 35.29 | 20.47 | 20.71 | 30.38 | a | |||||||||||
2011 | 15.58 | 14.30 | a | 24.00 | 25.80 | 32.08 | e | 42.73 | 51.55 | 52.32 | 43.33 | 31.87 | 20.13 | 14.00 | 30.64 | |||||||||||
2012 | 17.03 | 14.90 | 24.81 | 30.07 | 37.29 | 47.43 | 53.35 | 52.97 | 43.23 | 35.52 | 25.83 | 13.33 | j | 34.77 | a | |||||||||||
2013 | 10.35 | 13.93 | 24.35 | 27.48 | a | 38.81 | 48.70 | 55.71 | 52.03 | 42.73 | 30.29 | 23.57 | 13.94 | 31.82 | ||||||||||||
2014 | 20.00 | 22.93 | 23.16 | 29.41 | a | 36.32 | 44.40 | 55.06 | 48.87 | 45.87 | 34.61 | 22.30 | 17.94 | 33.41 | ||||||||||||
2015 | 20.39 | 23.29 | 26.74 | 27.33 | 36.39 | 50.37 | 50.13 | 51.10 | 45.90 | 37.23 | 17.97 | 15.73 | a | 33.55 | ||||||||||||
2016 | 15.43 | a | 21.10 | 25.03 | ----- | z | 35.52 | 49.33 | 53.71 | 50.00 | 43.70 | 37.10 | 25.43 | 13.77 | 33.65 | a | ||||||||||
2017 | 15.81 | 25.11 | 30.42 | 28.47 | 36.32 | 49.60 | 54.77 | 51.55 | 41.33 | ----- | z | 26.50 | 19.68 | 34.51 | a | |||||||||||
2018 | 19.65 | 15.68 | 22.48 | 28.47 | ----- | z | 48.77 | 56.94 | 52.61 | 45.13 | 30.90 | 20.30 | 15.68 | 32.42 | a | |||||||||||
2019 | 15.74 | 12.50 | 23.58 | 32.90 | 33.81 | 42.87 | 53.00 | 53.52 | 43.73 | 23.16 | 25.67 | 13.97 | 31.20 | |||||||||||||
2020 | 16.32 | 14.00 | 24.29 | 28.83 | 39.06 | 45.03 | 53.45 | 55.74 | 42.60 | 32.94 | 21.67 | 15.03 | 32.41 | |||||||||||||
2021 | 14.55 | 16.96 | 19.39 | 27.50 | 37.00 | 50.60 | 57.32 | 53.00 | 46.50 | 33.19 | 28.37 | 18.61 | 33.58 | |||||||||||||
2022 | 14.39 | 14.11 | 23.81 | 30.37 | 36.19 | 48.73 | 56.16 | 57.16 | 50.38 | i | 33.65 | 18.23 | 16.97 | 31.80 | a | |||||||||||
2023 | 12.94 | 11.61 | 17.26 | 26.43 | 39.61 | 43.63 | 56.00 | 47.19 | 44.07 | 33.60 | a | 24.63 | 14.14 | x | 32.45 | a | ||||||||||
2024 | 19.52 | 17.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.67 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.15 | 17.48 | 23.74 | 29.09 | 36.83 | 45.43 | 52.91 | 51.26 | 42.92 | 33.14 | 22.73 | 15.00 | 32.02 | |||||||||||||
S.D. | 3.54 | 3.74 | 2.88 | 2.75 | 2.46 | 3.23 | 3.39 | 2.35 | 2.10 | 2.86 | 3.36 | 2.98 | 1.22 | |||||||||||||
SKEW | -0.18 | 0.63 | -0.15 | 0.30 | -0.34 | -0.53 | -2.20 | -0.05 | -0.09 | -1.01 | -0.49 | -0.24 | -0.92 | |||||||||||||
MAX | 20.68 | 26.88 | 30.42 | 35.21 | 40.74 | 50.60 | 57.32 | 57.16 | 47.14 | 37.41 | 28.37 | 20.71 | 33.58 | |||||||||||||
MIN | 8.20 | 11.61 | 17.26 | 23.82 | 31.48 | 36.03 | 38.69 | 45.04 | 38.43 | 23.16 | 15.24 | 7.82 | 28.43 | |||||||||||||
YRS | 37 | 36 | 36 | 35 | 35 | 35 | 34 | 36 | 36 | 35 | 37 | 34 | 24 |