YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1984 | ----- | z | ----- | z | ----- | z | ----- | z | 40.71 | 54.23 | d | 56.24 | b | 57.90 | a | 41.57 | b | 37.93 | c | 17.53 | -1.90 | 38.03 | d | |||
1985 | -5.48 | f | -1.89 | 23.85 | d | 32.59 | a | 46.71 | 48.74 | c | 54.41 | b | 52.97 | b | 43.75 | b | 30.00 | 3.39 | b | -9.07 | c | 29.59 | a | |||
1986 | 1.04 | c | 0.89 | 19.70 | d | 32.64 | b | 43.96 | c | 53.73 | d | 58.97 | b | 52.39 | c | 46.55 | a | 32.38 | b | 11.56 | c | 10.36 | c | 30.35 | ||
1987 | 9.41 | b | 18.73 | b | 21.94 | 33.90 | a | 46.83 | a | 54.67 | 60.36 | c | 52.90 | a | ----- | z | 27.86 | c | 23.41 | a | 14.06 | 33.10 | a | |||
1988 | -9.58 | g | -4.62 | e | 22.38 | e | 27.45 | a | 48.67 | d | 57.68 | b | 60.07 | b | 55.87 | a | 44.45 | a | 28.97 | a | 19.57 | b | 7.26 | d | 33.43 | a |
1989 | -3.39 | -9.86 | 11.07 | a | 31.27 | 43.67 | a | 51.10 | 61.03 | 56.32 | 43.60 | 30.16 | 12.79 | a | -5.83 | b | 26.83 | |||||||||
1990 | 12.35 | 2.71 | 21.19 | 27.53 | 39.81 | 52.86 | b | 56.84 | 55.65 | 47.87 | 29.81 | 19.30 | -0.27 | a | 30.47 | |||||||||||
1991 | -6.03 | 9.81 | a | 19.52 | 32.90 | 47.77 | 58.63 | 57.13 | 57.55 | 45.45 | a | 29.35 | 12.30 | 8.93 | b | 31.11 | ||||||||||
1992 | 4.79 | b | 14.22 | b | 23.93 | b | 28.27 | 41.54 | e | 49.21 | a | 52.79 | c | 51.00 | 42.32 | b | 30.13 | a | 20.87 | 2.10 | a | 30.10 | ||||
1993 | -6.43 | a | -2.08 | b | 14.29 | 29.33 | 41.03 | a | 49.23 | d | 55.75 | c | 56.23 | 39.27 | 27.87 | 13.63 | 4.53 | a | 26.89 | |||||||
1994 | -16.07 | b | -11.31 | b | 18.61 | 30.37 | 43.00 | b | 54.10 | a | 55.50 | a | 52.90 | 47.66 | a | 38.37 | a | 23.04 | b | 10.07 | a | 28.85 | ||||
1995 | 0.68 | 2.62 | b | 19.33 | a | 28.57 | 41.48 | b | 57.96 | b | 57.14 | b | 56.89 | c | 41.52 | e | 34.40 | a | 13.22 | c | 3.79 | b | 29.80 | |||
1996 | -9.70 | a | 4.52 | d | 11.33 | g | 28.07 | a | 39.62 | b | 53.67 | f | 55.45 | b | 53.88 | e | 46.60 | 33.14 | c | 8.78 | c | -3.04 | f | 28.93 | c | |
1997 | -11.07 | b | -0.54 | d | 8.83 | b | 27.17 | 38.84 | 54.77 | 58.24 | b | 53.81 | 46.87 | 36.04 | d | 16.72 | a | 15.17 | b | 28.74 | ||||||
1998 | 2.96 | g | 19.00 | a | 19.07 | c | 32.54 | f | 48.64 | c | 51.59 | a | 58.58 | 57.45 | b | 46.81 | c | 37.42 | g | 22.68 | e | 9.64 | c | 37.05 | c | |
1999 | -3.38 | b | 12.70 | e | 21.50 | c | 34.58 | d | 46.18 | c | 54.17 | 60.14 | c | 55.86 | c | 49.30 | 32.26 | d | 23.41 | a | 11.55 | b | 33.19 | |||
2000 | -1.37 | a | 8.92 | c | 26.52 | 29.38 | a | 44.83 | b | 52.34 | a | 59.43 | a | 56.73 | a | 44.04 | f | 36.03 | b | 19.17 | a | -6.50 | a | 29.59 | a | |
2001 | 4.94 | -6.14 | 15.10 | b | 34.17 | 46.77 | 55.21 | a | 59.77 | a | 57.86 | c | 45.79 | b | 32.16 | 28.61 | b | 11.65 | 32.16 | |||||||
2002 | 8.00 | 12.50 | 9.26 | 28.39 | b | 36.66 | b | 56.18 | b | 61.77 | a | 55.68 | 48.60 | 29.63 | a | 19.80 | 10.32 | 31.40 | ||||||||
2003 | 1.23 | a | -2.59 | a | 12.55 | 31.86 | b | 42.90 | b | 54.93 | c | 57.76 | b | 58.87 | 43.69 | a | 35.32 | 15.80 | 11.43 | c | 30.31 | |||||
2004 | -7.80 | a | 1.54 | a | 20.93 | a | 29.93 | 40.90 | 50.86 | b | 56.40 | a | 50.52 | 49.48 | a | 35.10 | 23.97 | a | 10.87 | 30.22 | ||||||
2005 | -5.37 | a | 7.56 | a | 17.55 | 34.90 | 43.16 | 58.75 | b | 60.19 | 55.45 | i | 48.00 | m | 36.94 | 23.17 | a | 9.97 | a | 28.68 | b | |||||
2006 | 14.32 | -0.50 | 17.58 | 37.20 | 46.35 | 55.77 | 60.13 | 56.23 | 46.34 | a | 30.89 | c | 19.07 | a | 13.42 | 33.07 | ||||||||||
2007 | 1.32 | ----- | z | 20.52 | 30.77 | 46.65 | 58.74 | c | 60.90 | 54.61 | 47.43 | 38.61 | 21.46 | b | ----- | z | 38.10 | b | ||||||||
2008 | -5.60 | a | -6.50 | c | 12.13 | 29.13 | 39.39 | 52.53 | 57.52 | 56.65 | ----- | z | 34.94 | 23.85 | c | -6.00 | 26.18 | a | ||||||||
2009 | -11.07 | b | 1.46 | 11.03 | a | 30.63 | 39.74 | 52.07 | 55.00 | a | 54.35 | 50.93 | b | 33.61 | 27.07 | 1.93 | a | 28.90 | ||||||||
2010 | -0.10 | a | -2.07 | a | 25.45 | 36.28 | a | 45.47 | a | 55.60 | 60.47 | a | 59.42 | 45.00 | b | 37.06 | 19.90 | a | 1.42 | 31.99 | ||||||
2011 | -5.73 | a | 0.25 | 6.68 | 33.63 | 43.00 | 54.19 | c | 58.73 | a | ----- | z | 46.46 | b | 38.45 | 21.48 | a | 13.16 | 28.21 | a | ||||||
2012 | 7.48 | 8.97 | ----- | z | 34.33 | 46.57 | a | 56.73 | 63.48 | 54.19 | 41.38 | a | 33.16 | 19.77 | 5.81 | 33.81 | a | |||||||||
2013 | 0.74 | 0.57 | 4.77 | 24.30 | 43.45 | 51.00 | s | 58.65 | 57.26 | 50.33 | 34.94 | 17.07 | -4.65 | 26.13 | a | |||||||||||
2014 | -8.19 | -6.93 | 12.16 | 27.87 | 44.23 | 56.50 | 56.97 | 58.19 | 46.03 | 34.58 | 11.73 | 11.16 | 28.69 | |||||||||||||
2015 | 4.20 | a | -6.82 | 18.84 | 30.23 | 42.65 | 54.71 | f | 60.10 | 55.40 | k | 50.73 | 35.60 | a | 23.73 | 14.45 | 27.37 | b | ||||||||
2016 | 3.19 | 13.76 | 25.29 | 30.53 | 46.16 | 56.83 | 60.06 | 56.81 | 48.70 | 35.61 | 30.13 | 6.16 | 34.44 | |||||||||||||
2017 | 4.52 | 13.25 | 16.42 | 31.33 | 43.65 | 54.17 | 58.00 | 53.58 | 48.03 | 33.29 | 17.56 | e | 4.45 | 31.52 | ||||||||||||
2018 | -0.06 | -6.25 | 16.19 | 22.10 | 46.71 | 59.03 | 58.74 | 54.00 | 45.93 | 28.81 | 14.03 | 10.61 | 29.15 | |||||||||||||
2019 | -3.19 | -11.79 | 6.61 | 31.67 | 38.35 | 55.13 | 60.45 | 54.97 | 50.03 | 32.58 | 18.00 | 3.45 | 28.02 | |||||||||||||
2020 | 1.42 | 0.79 | 17.10 | 26.93 | 40.94 | 58.27 | 62.00 | 58.29 | 44.87 | 27.65 | 20.13 | 11.32 | 30.81 | |||||||||||||
2021 | 10.03 | -4.07 | 21.35 | 28.20 | 40.39 | 57.20 | 60.84 | 56.81 | 48.60 | 39.39 | 23.23 | 4.71 | 32.22 | |||||||||||||
2022 | -9.42 | -6.21 | 15.55 | 27.63 | 43.42 | 56.97 | 60.35 | 56.81 | 47.37 | 32.65 | 16.60 | 0.90 | 28.55 | |||||||||||||
2023 | 1.44 | d | -3.04 | 0.10 | 24.27 | 47.61 | 60.80 | 56.23 | 57.84 | 50.83 | 35.97 | 20.97 | 19.03 | 31.00 | ||||||||||||
2024 | 6.81 | 19.52 | 18.35 | 32.05 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.89 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.43 | 2.08 | 16.66 | 30.27 | 43.46 | 54.90 | 58.56 | 55.65 | 46.39 | 33.38 | 18.96 | 6.30 | 30.34 | |||||||||||||
S.D. | 7.13 | 8.65 | 6.19 | 3.35 | 3.12 | 2.98 | 2.33 | 2.18 | 2.93 | 3.35 | 5.40 | 6.89 | 1.90 | |||||||||||||
SKEW | -0.00 | 0.48 | -0.67 | -0.12 | -0.15 | -0.27 | -0.33 | -0.50 | -0.44 | -0.06 | -0.50 | -0.54 | 0.09 | |||||||||||||
MAX | 14.32 | 19.52 | 26.52 | 37.20 | 48.67 | 60.80 | 63.48 | 59.42 | 50.93 | 39.39 | 30.13 | 19.03 | 34.44 | |||||||||||||
MIN | -16.07 | -11.79 | 0.10 | 22.10 | 36.66 | 48.74 | 52.79 | 50.52 | 39.27 | 27.65 | 3.39 | -9.07 | 26.83 | |||||||||||||
YRS | 37 | 39 | 38 | 38 | 40 | 37 | 40 | 37 | 36 | 39 | 40 | 38 | 26 |