YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | 27.17 | r | 36.32 | 48.57 | 51.19 | 50.13 | 45.23 | 34.17 | b | 20.17 | 4.26 | 36.26 | d | |||||||
1968 | -2.52 | -0.41 | 23.32 | 30.72 | a | 37.97 | 50.30 | 53.16 | 51.03 | 44.70 | 31.90 | 19.83 | 1.00 | 28.42 | ||||||||||||
1969 | -10.58 | 4.36 | 4.52 | b | 32.40 | 41.58 | 45.27 | 54.61 | 54.77 | 44.83 | 29.61 | 21.70 | 8.06 | 27.59 | ||||||||||||
1970 | -6.61 | -0.26 | a | 7.71 | 30.17 | 41.19 | 55.33 | 54.23 | 51.00 | 41.77 | 30.77 | 16.17 | -3.10 | 26.53 | ||||||||||||
1971 | -11.27 | a | -0.86 | 10.84 | 28.47 | 37.42 | 53.07 | 51.06 | 52.03 | 43.67 | 36.55 | b | 21.96 | c | 1.42 | 27.03 | ||||||||||
1972 | -6.57 | a | -2.38 | 15.48 | 30.67 | 46.00 | 48.43 | 51.90 | 55.19 | 42.89 | c | 30.31 | b | 20.79 | b | -2.43 | a | 27.52 | ||||||||
1973 | 7.03 | a | 7.61 | 29.48 | 30.43 | 39.65 | 50.37 | 53.00 | 56.42 | 44.50 | 38.74 | 15.50 | b | 3.13 | 31.32 | |||||||||||
1974 | -7.55 | -0.21 | 11.19 | 30.13 | 38.79 | b | 48.60 | 55.74 | 45.74 | 36.53 | 32.10 | 17.90 | 7.13 | 26.34 | ||||||||||||
1975 | -1.13 | a | -3.40 | c | 5.54 | g | 25.67 | 38.90 | b | 48.80 | j | 55.41 | b | 49.77 | a | 39.00 | b | 34.16 | 19.14 | b | 4.58 | 26.21 | b | |||
1976 | -0.68 | 11.29 | a | 11.42 | 32.97 | a | 39.00 | 51.16 | e | 51.14 | c | 53.48 | 41.07 | a | 25.68 | c | 9.66 | a | -1.41 | b | 27.06 | |||||
1977 | -12.43 | c | 10.52 | a | 20.76 | b | 32.16 | e | 49.43 | a | 51.21 | a | 52.87 | a | 46.17 | g | 44.11 | c | 30.68 | f | 13.91 | h | -4.07 | b | 27.17 | c |
1978 | -12.07 | d | -6.32 | c | 12.15 | e | 31.65 | g | 43.41 | d | 48.89 | b | 51.76 | b | ----- | z | 45.40 | e | 32.57 | h | 9.46 | b | -4.90 | b | 20.87 | c |
1979 | -15.20 | a | -13.52 | a | 7.81 | 23.03 | 35.90 | 50.76 | a | 56.66 | b | 52.25 | c | 44.35 | d | 31.42 | e | 15.39 | g | 8.00 | h | 27.35 | b | |||
1980 | -5.00 | b | 1.21 | a | 12.43 | h | 32.29 | b | 41.83 | b | 50.41 | a | 54.62 | b | 50.33 | d | 42.00 | b | 28.28 | f | 24.72 | a | 5.67 | g | 32.49 | c |
1981 | 2.08 | e | 8.91 | f | 22.68 | 30.31 | d | 40.19 | d | 47.56 | c | 56.70 | d | 54.14 | b | 43.77 | d | 33.68 | c | 24.38 | a | 1.03 | a | 32.41 | a | |
1982 | -18.67 | a | -1.23 | b | 13.07 | a | 26.93 | a | 43.93 | b | 46.89 | c | 56.23 | a | 52.67 | a | 40.58 | f | 37.07 | a | 13.93 | b | 12.63 | a | 25.77 | a |
1983 | 10.47 | a | 14.44 | a | 21.94 | 27.83 | 36.85 | e | 49.31 | d | 59.80 | a | 58.83 | a | 42.17 | a | 32.58 | e | 23.97 | -10.40 | a | 30.65 | ||||
1984 | 1.88 | e | 16.28 | d | 15.81 | 31.29 | b | 39.67 | a | 51.73 | 54.84 | 55.50 | e | 36.88 | e | 32.03 | b | 15.38 | d | -1.52 | d | 29.15 | ||||
1985 | -4.72 | b | -1.92 | b | 22.37 | a | 30.55 | a | 46.06 | 45.54 | b | 53.14 | b | 50.67 | a | 41.30 | c | 30.32 | c | 5.04 | c | -6.00 | g | 28.94 | a | |
1986 | 6.59 | b | 0.23 | b | 24.24 | b | 30.43 | 42.59 | d | 52.26 | c | 55.94 | 50.11 | c | 43.28 | e | 33.20 | a | 9.74 | c | 9.43 | c | 29.84 | |||
1987 | 9.41 | b | 18.11 | 20.00 | 36.50 | 47.03 | a | 53.53 | 58.35 | 51.21 | b | 45.83 | 28.03 | 22.80 | 15.15 | e | 33.83 | |||||||||
1988 | -3.41 | b | -0.86 | a | 17.47 | a | 27.80 | 45.39 | 57.43 | b | 55.65 | 54.06 | 42.97 | 27.63 | a | 18.04 | d | 4.04 | c | 28.85 | ||||||
1989 | -2.07 | c | -7.56 | a | 11.39 | 29.30 | 40.50 | a | 47.21 | a | 58.20 | a | 54.74 | 44.60 | 30.90 | b | 13.68 | b | -3.52 | 26.45 | ||||||
1990 | 12.60 | a | 5.00 | 19.79 | c | 28.40 | 37.97 | b | 52.43 | 56.00 | c | 54.84 | f | 45.62 | a | 30.45 | b | 17.70 | 1.07 | d | 27.91 | a | ||||
1991 | -4.85 | d | 13.96 | b | 18.27 | a | 31.63 | 46.48 | 56.00 | a | 54.71 | 54.97 | b | 44.00 | 27.60 | a | 13.50 | b | 7.15 | e | 30.29 | |||||
1992 | 9.35 | 15.14 | 23.11 | d | 27.52 | c | 42.13 | a | 49.00 | b | 48.46 | e | 49.17 | g | 41.86 | a | 30.04 | g | 20.31 | a | -1.74 | 27.51 | b | |||
1993 | -4.79 | c | -0.57 | 15.35 | 29.46 | b | 41.26 | 47.96 | d | 54.13 | a | 54.03 | a | 38.86 | b | 28.15 | e | 16.54 | b | 5.55 | 27.16 | |||||
1994 | -12.14 | b | -6.70 | a | 21.81 | 29.88 | d | 43.81 | 53.61 | b | 52.87 | a | 51.07 | a | 46.80 | 36.59 | d | 21.92 | e | 8.34 | b | 28.99 | ||||
1995 | -1.31 | e | 2.26 | e | 15.07 | b | 27.14 | b | 39.68 | c | 54.97 | a | 56.40 | a | 56.89 | c | 42.04 | b | 32.88 | e | 13.63 | 4.77 | 28.70 | |||
1996 | -10.06 | 4.68 | a | 9.48 | 25.31 | a | 36.95 | i | 52.92 | d | 53.90 | b | 53.32 | c | 42.83 | l | 30.03 | b | 2.20 | e | -6.30 | a | 21.55 | b | ||
1997 | -10.10 | a | 2.73 | f | 11.62 | b | 24.25 | f | 37.96 | d | 54.74 | c | 57.30 | d | 50.39 | c | 44.07 | a | 33.19 | d | 16.73 | 15.87 | 31.18 | b | ||
1998 | 1.27 | a | 20.56 | a | 14.19 | 33.81 | c | 43.80 | f | 49.00 | f | 54.97 | b | 55.54 | e | 48.20 | e | 35.04 | c | 19.85 | c | 7.77 | e | 29.12 | b | |
1999 | -2.11 | c | 10.64 | c | 18.54 | e | 29.79 | f | 44.50 | e | 53.34 | a | 56.53 | a | 54.81 | 43.66 | a | 31.68 | c | 24.61 | b | 12.55 | b | 31.70 | a | |
2000 | 2.21 | g | 11.48 | b | 25.04 | g | 29.86 | i | 43.68 | f | 51.04 | b | 59.10 | a | 56.70 | a | 46.80 | e | 35.83 | a | 16.47 | m | -6.93 | d | 36.29 | e |
2001 | 7.44 | d | -3.61 | j | 17.68 | l | 31.32 | h | 44.00 | b | 54.32 | k | 58.91 | h | 55.61 | c | 43.86 | i | 31.05 | k | 25.25 | r | 10.57 | q | 35.68 | i |
2002 | 7.65 | n | 11.31 | l | 2.21 | q | 28.54 | q | 31.91 | i | 50.92 | r | 57.38 | o | 52.53 | n | 43.47 | k | 24.43 | j | 18.00 | t | 7.76 | n | ----- | z |
2003 | -3.17 | s | 2.00 | q | 18.62 | r | 32.14 | b | 43.29 | 52.53 | 57.00 | f | 57.52 | f | 43.04 | c | 33.46 | g | 12.04 | f | 10.93 | d | 36.39 | g | ||
2004 | -9.85 | e | 5.92 | c | 19.96 | d | 29.69 | d | 38.33 | a | 49.07 | 55.35 | 48.03 | 45.04 | c | 33.68 | c | 21.78 | c | 9.23 | 28.85 | |||||
2005 | -3.86 | c | 5.67 | g | 17.82 | i | 32.18 | m | 42.68 | c | 55.11 | b | 58.00 | j | 52.28 | b | 44.93 | c | 33.64 | i | 21.00 | r | 8.72 | m | 38.23 | g |
2006 | 19.46 | g | 1.56 | l | 21.00 | g | 36.85 | j | 44.52 | d | 53.82 | b | 58.52 | 55.00 | b | 43.60 | 28.04 | e | 17.23 | q | 11.29 | n | 47.25 | f | ||
2007 | 8.36 | q | -2.00 | h | 21.58 | e | 28.43 | b | 44.55 | b | 54.44 | e | 59.68 | f | 53.55 | b | 45.38 | a | 35.62 | e | 16.10 | j | -0.52 | f | 40.51 | e |
2008 | -2.54 | g | -6.26 | j | 11.71 | g | 25.40 | 38.44 | f | 49.88 | e | 55.61 | c | 54.79 | b | 44.43 | 32.60 | a | 22.68 | h | -6.13 | h | 43.79 | f | ||
2009 | -8.46 | c | 0.52 | a | 9.31 | e | 30.00 | b | 37.48 | 49.43 | 52.65 | 53.06 | 50.70 | 32.37 | a | 24.73 | -0.33 | a | 27.62 | |||||||
2010 | 1.81 | -1.63 | a | 23.80 | a | 35.21 | b | 43.58 | 52.89 | b | 57.57 | a | 56.42 | 45.07 | 35.31 | b | 18.00 | b | -0.05 | i | 33.46 | a | ||||
2011 | -4.46 | e | -1.88 | c | 7.96 | c | 30.23 | d | 40.52 | 53.70 | 60.74 | 57.97 | a | 47.43 | i | 37.60 | a | 19.48 | c | 13.77 | 28.69 | a | ||||
2012 | 9.03 | 9.26 | b | 27.48 | 31.22 | g | 43.14 | c | 54.67 | 62.13 | 53.13 | 41.67 | 32.32 | 18.27 | 5.88 | e | 32.45 | a | ||||||||
2013 | -2.12 | f | 3.87 | e | -1.50 | g | 14.22 | g | 41.79 | b | 54.00 | g | 56.91 | i | 55.77 | a | 49.39 | g | 39.64 | t | 15.09 | h | -7.65 | k | 33.81 | i |
2014 | -10.73 | i | -8.67 | j | 12.86 | j | 24.65 | g | 41.00 | c | 53.57 | i | 53.57 | j | 55.23 | i | 44.17 | g | 33.45 | i | 9.81 | n | 4.87 | h | 41.00 | k |
2015 | 3.40 | k | -7.20 | h | 18.55 | i | 28.00 | f | 41.41 | d | 54.62 | a | 59.90 | a | 53.90 | 48.70 | 34.93 | b | 24.60 | e | 11.57 | h | 45.44 | e | ||
2016 | 4.14 | c | 14.38 | 23.07 | b | 28.45 | a | 42.96 | d | 53.73 | d | 56.81 | e | 54.90 | 46.57 | 34.65 | 29.13 | 2.26 | 32.59 | |||||||
2017 | 2.90 | 9.36 | 15.45 | 29.50 | 40.97 | 51.47 | 58.42 | 52.03 | 45.63 | 33.45 | 15.21 | a | 6.68 | 30.09 | ||||||||||||
2018 | -2.37 | a | -6.21 | 15.45 | 21.87 | 45.97 | 56.60 | 56.32 | 52.29 | 42.03 | 27.10 | 9.90 | 11.06 | 27.50 | ||||||||||||
2019 | -4.06 | -13.25 | 7.29 | 29.80 | 36.87 | 51.27 | 58.52 | 53.00 | 48.33 | 29.00 | 16.00 | 3.74 | 26.38 | |||||||||||||
2020 | 0.65 | 4.62 | 16.81 | 24.55 | a | 39.52 | 53.73 | 59.87 | 56.16 | 42.93 | 27.26 | 17.40 | 10.58 | 29.51 | ||||||||||||
2021 | 13.42 | -6.86 | 19.32 | 24.43 | 37.32 | 54.77 | 59.87 | 54.42 | 46.70 | 36.97 | 21.07 | 3.10 | a | 30.38 | ||||||||||||
2022 | -8.13 | -9.93 | 14.73 | a | 23.33 | 41.32 | 51.90 | 57.10 | 55.00 | 45.37 | 31.94 | 12.13 | -4.30 | a | 25.87 | |||||||||||
2023 | 1.00 | -3.11 | -0.52 | 22.33 | 46.39 | 58.24 | a | 54.68 | 55.26 | 49.30 | 32.87 | 20.23 | 15.29 | 29.33 | ||||||||||||
2024 | 2.58 | 15.86 | 13.77 | 24.38 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 10.74 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -2.15 | 3.10 | 16.14 | 29.06 | 41.56 | 51.80 | 55.69 | 53.49 | 44.04 | 32.30 | 17.75 | 4.01 | 28.71 | |||||||||||||
S.D. | 7.59 | 8.50 | 6.38 | 3.29 | 3.19 | 3.02 | 2.86 | 2.57 | 2.83 | 3.13 | 5.51 | 6.58 | 1.96 | |||||||||||||
SKEW | 0.15 | 0.15 | -0.24 | -0.29 | 0.21 | -0.13 | -0.07 | -0.55 | -0.35 | -0.09 | -0.63 | -0.06 | 0.71 | |||||||||||||
MAX | 13.42 | 20.56 | 29.48 | 36.50 | 49.43 | 58.24 | 62.13 | 58.83 | 50.70 | 38.74 | 29.13 | 15.87 | 33.83 | |||||||||||||
MIN | -18.67 | -13.52 | -0.52 | 21.87 | 35.90 | 45.27 | 48.46 | 45.74 | 36.53 | 25.68 | 2.20 | -10.40 | 25.87 | |||||||||||||
YRS | 48 | 46 | 45 | 44 | 52 | 51 | 50 | 50 | 50 | 47 | 45 | 44 | 28 |