YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1989 | ----- | z | ----- | z | ----- | z | ----- | z | 24.10 | 27.76 | a | 35.29 | 30.53 | l | 23.63 | k | 14.73 | a | 6.28 | a | -3.45 | b | 17.45 | f | ||
1990 | -7.30 | h | -2.04 | a | 10.81 | 22.45 | a | 24.47 | a | 30.70 | 36.77 | 32.16 | 31.63 | 19.03 | 8.57 | -6.42 | 18.92 | a | ||||||||
1991 | -2.97 | -2.71 | 7.53 | a | 14.60 | 24.00 | 31.80 | 34.29 | 34.55 | 26.57 | 16.32 | 7.00 | -8.39 | 15.22 | ||||||||||||
1992 | -8.70 | a | -1.66 | 10.65 | 19.93 | 27.00 | e | 30.53 | 33.19 | ----- | z | 26.97 | 20.68 | 4.36 | b | -6.07 | a | 14.26 | a | |||||||
1993 | -1.74 | 2.58 | d | 11.73 | a | 17.28 | a | 27.29 | 29.67 | 31.71 | 32.87 | 23.77 | 19.36 | c | -0.90 | -6.32 | f | 17.60 | a | |||||||
1994 | -1.85 | e | -4.39 | e | 7.67 | g | 16.50 | b | 25.46 | c | 31.61 | b | 32.41 | b | 33.90 | b | 23.77 | 19.65 | 2.41 | c | -6.32 | i | 17.95 | b | ||
1995 | -3.93 | c | 8.36 | 10.10 | 18.14 | a | 29.32 | f | 31.45 | a | ----- | z | 37.19 | 30.43 | 17.90 | 14.23 | -0.48 | 16.34 | b | |||||||
1996 | -0.55 | -1.41 | 6.61 | 18.21 | b | 29.81 | e | 32.55 | a | 36.74 | 32.68 | 28.43 | 17.16 | 9.57 | i | 5.87 | 18.74 | a | ||||||||
1997 | -0.03 | a | -4.82 | 8.48 | 14.93 | c | 28.17 | y | 33.17 | g | 36.06 | 36.68 | 33.38 | a | 19.61 | 7.80 | -7.13 | 14.50 | b | |||||||
1998 | -0.23 | 1.79 | 8.77 | 18.38 | i | 24.48 | f | 30.37 | 39.42 | 38.67 | s | 30.58 | d | 21.61 | 13.13 | 1.87 | a | 16.37 | c | |||||||
1999 | 4.67 | a | 3.43 | 11.20 | a | 16.36 | e | 28.23 | r | 30.07 | 40.26 | 39.58 | 27.53 | 14.71 | 9.53 | -0.84 | 17.86 | a | ||||||||
2000 | 4.00 | a | 3.90 | 9.84 | 21.45 | a | 27.52 | j | 32.23 | 37.45 | 38.03 | 29.63 | 19.41 | d | -0.03 | a | -5.23 | 17.33 | a | |||||||
2001 | -8.68 | 3.61 | 14.43 | a | 20.96 | e | 28.00 | d | 31.83 | 40.42 | 37.68 | 28.17 | 21.10 | 12.30 | -5.35 | 18.71 | ||||||||||
2002 | -5.35 | -8.37 | a | 4.16 | 22.30 | 23.60 | a | 31.93 | 38.06 | 34.10 | 30.67 | 20.06 | 4.27 | -1.61 | 16.15 | |||||||||||
2003 | 7.26 | 3.04 | 13.90 | a | 18.20 | 27.10 | 32.50 | 36.48 | 39.53 | a | 28.13 | 23.19 | 13.93 | 0.71 | 20.33 | |||||||||||
2004 | -0.84 | -1.56 | b | 15.10 | 23.63 | 26.55 | 32.43 | 37.00 | 33.90 | 29.60 | 24.45 | 13.33 | -0.42 | 19.43 | ||||||||||||
2005 | 4.13 | 2.61 | 9.63 | a | 18.79 | b | 25.79 | c | 32.47 | 35.81 | 36.13 | a | 29.28 | a | 22.77 | a | 10.47 | 0.39 | 19.02 | |||||||
2006 | -1.68 | -3.33 | a | 7.19 | 19.74 | c | 27.34 | b | 31.54 | d | 40.23 | 37.23 | 25.78 | c | 19.10 | a | 7.70 | 0.31 | b | 17.60 | ||||||
2007 | -10.10 | a | 3.82 | 12.35 | 21.28 | a | 25.93 | d | 31.57 | 38.88 | g | 39.94 | 30.93 | 21.81 | 9.30 | 1.45 | 17.12 | a | ||||||||
2008 | -5.13 | 2.36 | a | 1.52 | 12.83 | 24.56 | f | 29.38 | a | 35.96 | d | 35.19 | 26.38 | a | 20.06 | 14.33 | 2.29 | 15.93 | a | |||||||
2009 | 5.58 | 3.52 | a | 8.97 | 17.53 | 30.57 | a | 34.57 | b | 35.45 | 32.48 | 29.20 | 20.55 | 8.33 | -3.74 | 18.58 | ||||||||||
2010 | -3.74 | -0.96 | 8.61 | 19.83 | 25.77 | 32.30 | 39.45 | 37.55 | 25.33 | 25.16 | 8.03 | 10.81 | 19.01 | |||||||||||||
2011 | -0.68 | -3.71 | 11.23 | 21.25 | b | 28.65 | 30.40 | 40.28 | b | 35.97 | b | 28.00 | b | 21.26 | d | 8.74 | c | -2.59 | d | 18.23 | ||||||
2012 | -1.26 | d | 1.36 | a | 12.90 | 21.34 | a | 25.48 | 32.90 | a | 40.83 | a | 37.88 | g | 30.21 | k | 21.45 | b | 11.83 | -1.21 | b | 16.56 | b | |||
2013 | -9.29 | -2.89 | 8.76 | b | 17.57 | 26.52 | d | 31.36 | b | 40.47 | a | 37.42 | 34.96 | b | 20.00 | a | 10.04 | c | -1.86 | b | 17.75 | |||||
2014 | -0.50 | c | 6.27 | f | 6.33 | a | 18.36 | b | 27.83 | a | 30.93 | a | 38.28 | f | 36.93 | b | 31.37 | c | 22.48 | f | 7.77 | h | 4.57 | a | 19.48 | d |
2015 | 6.57 | c | 8.30 | e | 13.30 | a | 20.62 | a | 29.10 | b | 36.00 | a | 39.25 | c | 36.57 | a | 29.39 | b | 24.53 | a | 4.92 | d | -1.30 | d | 20.61 | |
2016 | -2.20 | f | 1.52 | b | 9.41 | d | 22.73 | 26.57 | h | 35.71 | b | 38.00 | b | 36.10 | 27.96 | d | 22.83 | g | 15.46 | d | 0.76 | f | 23.36 | d | ||
2017 | -0.30 | d | 13.17 | d | 17.43 | a | 21.45 | a | 26.77 | a | 33.00 | b | 40.20 | a | 35.03 | 29.54 | b | 18.86 | c | 17.61 | b | 3.93 | b | 21.39 | ||
2018 | 0.72 | b | 8.59 | a | 10.77 | a | 23.54 | b | 27.81 | e | 33.07 | a | 38.00 | c | 34.79 | b | 28.07 | b | 24.63 | a | 7.64 | e | -6.87 | h | 21.60 | a |
2019 | -2.67 | g | -2.92 | d | 7.93 | d | 21.71 | b | 26.74 | h | 33.07 | c | 39.11 | c | 38.42 | 31.63 | c | 12.57 | a | 9.89 | b | -1.31 | e | 19.01 | b | |
2020 | 1.15 | d | -2.00 | d | 12.33 | j | ----- | z | 27.83 | s | 33.55 | j | 38.11 | c | 35.58 | l | 27.77 | d | 18.96 | g | 10.09 | h | -4.23 | i | 16.26 | h |
2021 | -2.46 | c | 7.00 | d | 6.64 | f | 16.83 | g | 27.64 | i | 35.44 | c | 41.50 | e | 36.69 | e | 30.78 | g | 21.96 | e | 18.62 | d | 4.75 | k | 22.68 | e |
2022 | -15.18 | n | -5.95 | f | 4.86 | i | 18.55 | j | 25.45 | k | 33.54 | f | 41.10 | j | 39.28 | b | 32.10 | 19.61 | 4.07 | -0.47 | a | 18.92 | g | |||
2023 | 2.65 | -0.88 | d | 6.87 | 17.29 | b | 28.52 | 33.69 | a | 38.39 | 38.61 | 30.53 | 20.29 | 12.00 | 1.19 | 19.10 | ||||||||||
2024 | 2.35 | 4.25 | a | 15.68 | f | 25.05 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.30 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -1.00 | 1.20 | 9.88 | 19.36 | 26.81 | 32.03 | 37.63 | 36.24 | 28.98 | 20.11 | 9.22 | -0.84 | 18.65 | |||||||||||||
S.D. | 4.53 | 4.63 | 3.30 | 2.74 | 1.82 | 1.81 | 2.56 | 2.23 | 2.56 | 2.91 | 4.69 | 4.14 | 1.65 | |||||||||||||
SKEW | -0.23 | 0.42 | -0.10 | -0.43 | 0.08 | 0.25 | -0.59 | -0.19 | -0.02 | -0.51 | -0.14 | 0.52 | -0.44 | |||||||||||||
MAX | 7.26 | 13.17 | 17.43 | 23.63 | 30.57 | 36.00 | 41.50 | 39.94 | 34.96 | 25.16 | 18.62 | 10.81 | 21.39 | |||||||||||||
MIN | -10.10 | -8.37 | 1.52 | 12.83 | 23.60 | 27.76 | 31.71 | 32.16 | 23.77 | 12.57 | -0.90 | -8.39 | 15.22 | |||||||||||||
YRS | 31 | 33 | 30 | 30 | 24 | 32 | 31 | 30 | 32 | 32 | 32 | 29 | 14 |