YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | 6.29 | 16.19 | 19.80 | 30.58 | 40.97 | a | 47.68 | 48.42 | 36.24 | a | 26.55 | ----- | z | 5.43 | a | 27.81 | b | |||||||
1971 | 6.23 | 12.93 | 14.10 | 22.90 | 28.90 | 38.60 | 46.48 | 48.48 | 35.30 | 28.16 | 15.67 | 1.32 | 24.92 | |||||||||||||
1972 | -8.23 | 1.24 | ----- | z | 25.83 | 29.40 | a | 42.67 | 46.10 | 45.84 | 39.80 | 35.97 | 17.63 | ----- | z | 27.63 | b | |||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9.87 | 9.87 | k | |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.97 | ----- | z | 21.97 | k | |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.63 | ----- | z | ----- | z | ----- | z | 38.63 | k | |
1980 | ----- | z | 4.24 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.24 | k | |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | -3.82 | 16.73 | a | 29.37 | 33.97 | 41.40 | 48.26 | 45.61 | 37.87 | 25.87 | 15.27 | 4.03 | 26.78 | a | ||||||||||
1990 | -0.89 | c | 5.25 | 21.84 | 29.73 | 32.77 | a | 39.13 | 49.16 | 43.61 | 41.53 | 27.35 | 19.24 | a | 0.26 | 25.75 | ||||||||||
1991 | -6.42 | 3.21 | 17.00 | 23.23 | 31.84 | 41.11 | b | 46.03 | a | 46.26 | 38.55 | a | 28.03 | 14.28 | e | 1.93 | a | 23.76 | ||||||||
1992 | -2.26 | 10.00 | 20.84 | 28.97 | 37.31 | e | 41.83 | 45.13 | 45.45 | 37.57 | 30.47 | a | 14.17 | 1.00 | b | 25.87 | ||||||||||
1993 | 0.84 | 6.08 | b | 10.75 | c | 24.23 | 35.16 | 38.11 | b | 42.19 | 44.27 | a | 33.90 | 26.84 | 12.13 | -0.34 | b | 22.85 | ||||||||
1994 | -4.45 | -3.32 | 18.24 | b | 26.04 | b | 34.45 | 41.69 | a | 45.24 | b | 48.29 | 39.11 | c | 28.45 | 17.71 | b | 5.11 | c | 24.71 | ||||||
1995 | 3.65 | 14.43 | 18.50 | e | 23.50 | b | 32.48 | b | 38.30 | 42.97 | 47.94 | 38.47 | 24.77 | 18.90 | 12.17 | b | 26.34 | |||||||||
1996 | 1.39 | 3.61 | a | 15.55 | 24.83 | 34.42 | 41.27 | 48.13 | 45.68 | 37.88 | d | 27.58 | 19.36 | e | 6.23 | 25.49 | ||||||||||
1997 | 3.43 | a | -2.38 | b | 11.13 | a | 25.85 | c | 34.41 | b | 39.89 | c | 43.42 | 46.37 | a | 41.07 | a | 25.16 | f | 17.00 | b | 2.10 | b | 23.85 | a | |
1998 | 0.86 | c | 7.81 | a | 14.67 | a | 22.66 | a | 30.40 | a | 37.50 | 50.32 | 46.03 | 42.17 | 30.26 | 19.37 | 8.34 | b | 25.87 | |||||||
1999 | 8.75 | c | 9.81 | a | 21.61 | 25.30 | 31.72 | b | 38.33 | 50.00 | 48.81 | 37.57 | 23.74 | d | 15.40 | 3.94 | 26.25 | |||||||||
2000 | 8.07 | a | 7.86 | 19.33 | a | 26.97 | a | 34.87 | a | 42.27 | 47.97 | 48.77 | 39.77 | 30.10 | a | 9.61 | b | 4.10 | b | 26.64 | ||||||
2001 | -7.55 | 3.57 | 20.54 | c | 26.48 | a | 35.97 | b | 39.45 | a | 47.60 | a | 47.24 | b | 37.45 | a | 28.43 | a | 19.63 | -1.42 | 24.78 | |||||
2002 | -0.28 | b | ----- | z | 10.53 | a | 25.64 | b | 30.77 | ----- | z | 48.40 | a | 44.03 | a | 39.00 | b | 26.00 | c | 14.35 | j | 3.75 | c | 25.32 | c | |
2003 | -2.65 | k | 4.67 | d | 18.81 | d | 24.58 | f | 33.08 | f | 40.42 | d | 52.00 | n | 49.20 | a | 37.65 | d | 29.93 | b | 20.07 | a | 9.21 | c | 26.25 | d |
2004 | -8.07 | b | -0.50 | a | 20.37 | a | 30.25 | b | 34.48 | 39.07 | a | 46.67 | j | 42.88 | e | 37.00 | b | 28.75 | c | 21.45 | a | 1.65 | 22.48 | a | ||
2005 | 6.13 | 6.27 | b | 17.07 | c | 22.33 | i | 35.16 | l | 38.86 | a | 45.77 | 46.32 | 39.12 | e | 31.91 | i | 19.70 | -2.71 | 24.06 | c | |||||
2006 | -5.68 | -6.57 | 15.55 | 24.83 | a | 32.45 | 39.83 | 50.00 | 48.45 | 35.28 | a | 29.67 | a | 16.40 | 10.48 | b | 24.22 | |||||||||
2007 | -3.61 | 11.93 | 18.87 | 27.07 | 33.45 | 40.23 | 50.52 | 50.23 | 40.33 | 27.94 | 16.17 | a | 2.97 | a | 26.34 | |||||||||||
2008 | -11.81 | -1.52 | d | 4.03 | 21.07 | 31.19 | 38.31 | a | 46.74 | 46.65 | 36.69 | a | 27.24 | b | 20.80 | 9.20 | a | 22.38 | ||||||||
2009 | 3.69 | b | 8.67 | a | 18.11 | c | 25.47 | 38.97 | 41.00 | 44.87 | 41.77 | 37.34 | a | 26.10 | 14.77 | -1.77 | a | 24.92 | ||||||||
2010 | -2.25 | c | 1.22 | e | 8.73 | a | 25.12 | d | 30.87 | a | 39.93 | 47.84 | 46.63 | a | 35.77 | 30.77 | 14.07 | a | 17.46 | e | 24.68 | |||||
2011 | -3.46 | c | 0.04 | d | 16.28 | b | 25.21 | a | 30.06 | 38.10 | 48.40 | a | 47.45 | 38.67 | 27.00 | a | 14.57 | g | 3.46 | g | 26.77 | b | ||||
2012 | 2.57 | c | 3.93 | 13.33 | g | 26.00 | b | 31.93 | a | ----- | z | 48.42 | 46.54 | c | 36.38 | f | 25.97 | 13.63 | 4.06 | 22.56 | c | |||||
2013 | -11.71 | -5.25 | 11.73 | a | 23.77 | 31.61 | 38.77 | 50.84 | 46.77 | 41.60 | 25.26 | 18.15 | d | -2.77 | 22.40 | |||||||||||
2014 | -0.48 | 7.75 | 15.42 | 23.93 | 31.84 | 37.00 | 46.90 | 45.32 | 40.47 | 29.19 | 15.67 | 11.00 | 25.33 | |||||||||||||
2015 | -1.61 | 11.46 | 17.17 | a | 23.03 | 34.10 | 40.83 | 46.32 | 46.26 | 38.54 | d | 33.33 | d | 17.59 | a | 5.58 | 26.05 | |||||||||
2016 | -5.39 | -2.00 | d | 20.23 | 25.27 | ----- | z | 40.20 | 44.26 | 44.90 | a | 37.07 | a | 28.16 | ----- | z | 3.86 | c | 23.66 | b | ||||||
2017 | ----- | z | 13.54 | 18.68 | 24.33 | 30.48 | 39.43 | 47.58 | 44.39 | 37.70 | 27.65 | h | 22.19 | d | 9.03 | 28.74 | b | |||||||||
2018 | 4.55 | 13.07 | 16.84 | 26.62 | a | 32.03 | 40.73 | 49.00 | 44.81 | 37.77 | 28.32 | 9.07 | -2.35 | 25.04 | ||||||||||||
2019 | -4.45 | -5.46 | 14.55 | 25.93 | 30.55 | 38.63 | 45.45 | 44.61 | 37.30 | 19.29 | 13.40 | 3.33 | a | 21.93 | ||||||||||||
2020 | -0.35 | 3.79 | 19.77 | 24.30 | 32.39 | 41.03 | 46.23 | 45.97 | 36.00 | 26.10 | a | 17.93 | 0.13 | 24.44 | ||||||||||||
2021 | -1.55 | 7.04 | 16.10 | 24.23 | 32.42 | 41.13 | 50.13 | 44.42 | 38.00 | 28.10 | 17.60 | 8.42 | 25.50 | |||||||||||||
2022 | -1.13 | -0.50 | 13.23 | 23.87 | 32.10 | 43.70 | 53.45 | i | 49.19 | 39.90 | 26.90 | 9.80 | 7.74 | 22.25 | a | |||||||||||
2023 | -1.13 | -8.07 | 7.58 | 20.73 | 34.35 | 37.83 | 49.23 | 49.52 | 37.97 | 26.87 | 15.40 | 11.77 | 23.50 | |||||||||||||
2024 | 5.03 | 7.76 | 22.15 | d | 22.17 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 11.65 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -1.07 | 4.05 | 16.18 | 25.07 | 32.71 | 39.93 | 47.25 | 46.40 | 38.21 | 27.81 | 16.61 | 4.71 | 24.80 | |||||||||||||
S.D. | 5.21 | 6.03 | 4.20 | 2.32 | 2.22 | 1.58 | 2.22 | 1.97 | 1.85 | 2.78 | 3.37 | 4.80 | 1.34 | |||||||||||||
SKEW | -0.13 | -0.17 | -0.92 | 0.15 | 0.71 | 0.22 | -0.36 | -0.09 | 0.10 | 0.05 | -0.46 | 0.42 | -0.70 | |||||||||||||
MAX | 8.75 | 14.43 | 22.15 | 30.25 | 38.97 | 43.70 | 50.84 | 50.23 | 42.17 | 35.97 | 22.19 | 17.46 | 26.64 | |||||||||||||
MIN | -11.81 | -8.07 | 4.03 | 19.80 | 28.90 | 37.00 | 42.19 | 41.77 | 33.90 | 19.29 | 9.07 | -2.77 | 21.93 | |||||||||||||
YRS | 35 | 39 | 37 | 36 | 35 | 36 | 35 | 38 | 38 | 35 | 35 | 37 | 25 |