YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.79 | q | 49.87 | 34.97 | 22.83 | 5.77 | 28.36 | h | ||||
1961 | 0.35 | 12.75 | 24.33 | a | 27.23 | 40.65 | 53.70 | 56.77 | 58.48 | 43.62 | i | 35.13 | 23.07 | 4.71 | 30.65 | a | ||||||||||
1962 | -3.03 | 1.64 | 19.03 | a | 29.33 | 49.48 | 54.20 | 56.58 | 56.94 | 44.93 | 38.48 | 26.93 | 8.32 | 31.90 | ||||||||||||
1963 | -7.16 | 0.75 | 24.10 | 35.40 | 44.00 | 57.53 | 60.39 | 56.65 | 50.47 | 43.35 | 24.93 | -1.13 | 32.44 | |||||||||||||
1964 | 6.45 | 9.38 | 10.32 | 34.03 | 47.32 | 54.40 | 60.97 | 53.94 | 46.97 | 35.90 | 22.40 | 0.52 | 31.88 | |||||||||||||
1965 | -6.94 | -2.93 | 5.52 | 33.60 | 46.90 | 54.45 | a | 58.06 | 55.29 | 42.53 | 37.74 | 21.60 | 16.42 | 30.19 | ||||||||||||
1966 | -11.23 | 2.37 | a | 24.39 | 29.70 | 39.61 | 55.00 | 61.42 | 54.90 | 45.83 | 34.26 | 17.30 | 5.19 | 29.90 | ||||||||||||
1967 | 0.94 | -8.43 | 16.61 | 32.20 | 37.48 | 53.10 | 55.84 | 52.97 | 46.10 | 35.39 | 21.87 | 10.00 | 29.51 | |||||||||||||
1968 | -0.03 | 0.24 | 24.74 | 34.90 | 41.58 | 54.90 | 58.19 | 56.26 | 47.93 | 39.06 | 24.80 | 5.35 | 32.33 | |||||||||||||
1969 | -5.13 | 6.89 | 11.06 | 35.57 | 46.87 | 48.60 | 58.32 | 57.42 | 47.73 | 35.16 | 22.80 | 10.57 | a | 31.32 | ||||||||||||
1970 | -6.58 | 0.71 | 10.71 | 30.67 | 43.45 | 57.40 | 59.39 | 56.55 | 47.47 | 36.39 | 20.77 | 4.48 | 30.12 | |||||||||||||
1971 | -7.74 | 3.57 | 15.32 | 31.48 | a | 39.55 | 56.50 | 52.65 | 54.32 | 49.13 | 40.74 | 23.17 | 5.58 | 30.36 | ||||||||||||
1972 | -7.16 | -2.97 | 16.26 | 31.00 | 48.77 | 52.90 | 57.13 | 57.94 | 45.40 | 32.65 | 23.37 | -2.16 | 29.43 | |||||||||||||
1973 | 4.35 | 7.89 | 28.52 | 32.13 | 42.32 | 54.30 | 57.90 | 59.39 | 45.90 | 40.39 | 21.50 | 5.23 | 33.32 | |||||||||||||
1974 | -1.61 | 1.39 | 16.97 | 33.13 | 41.29 | 53.13 | 61.81 | 53.45 | 41.23 | 36.10 | 23.63 | 13.10 | 31.14 | |||||||||||||
1975 | 0.23 | 2.07 | 9.45 | 27.67 | 45.84 | 54.03 | 60.58 | 56.87 | 43.97 | 37.16 | 21.47 | 7.06 | 30.53 | |||||||||||||
1976 | -5.06 | 11.97 | 17.48 | 36.93 | 42.48 | 56.57 | 58.94 | 58.58 | 45.77 | 29.65 | 13.77 | -2.55 | 30.38 | |||||||||||||
1977 | -12.87 | 9.46 | 25.43 | a | 39.30 | 53.48 | 55.60 | 61.29 | 54.39 | 50.23 | 35.94 | 21.40 | 4.00 | 33.14 | ||||||||||||
1978 | -6.42 | -1.39 | 16.42 | 32.27 | 47.65 | 54.00 | 60.03 | 58.35 | 53.00 | 36.03 | 18.70 | 1.06 | 30.81 | |||||||||||||
1979 | -10.74 | -4.96 | 17.45 | 29.33 | 40.39 | 53.10 | 58.70 | a | 56.26 | 49.23 | 35.35 | 22.13 | 15.16 | 30.12 | ||||||||||||
1980 | 1.97 | 3.76 | 12.77 | 34.73 | 46.61 | 53.93 | 59.94 | 58.10 | 47.70 | 33.48 | 25.73 | 8.87 | 32.30 | |||||||||||||
1981 | 4.84 | 11.21 | 24.23 | 36.40 | 44.06 | 54.37 | 60.48 | 58.77 | a | 47.23 | 37.03 | 27.20 | 6.81 | 34.39 | ||||||||||||
1982 | -13.10 | 3.75 | 17.10 | 30.87 | 49.32 | 48.83 | 60.84 | 57.29 | 49.07 | 38.45 | 17.90 | 14.27 | a | 31.22 | ||||||||||||
1983 | 6.52 | 16.96 | 24.71 | 30.30 | 41.06 | 54.50 | 64.16 | 63.84 | 50.37 | 38.52 | 27.27 | -8.29 | 34.16 | |||||||||||||
1984 | 1.42 | 19.59 | 14.93 | a | 33.53 | 43.65 | 56.53 | 59.03 | 60.71 | 42.32 | b | 39.23 | 21.73 | 3.77 | 33.04 | |||||||||||
1985 | -3.35 | 1.61 | 23.97 | 34.93 | a | 48.10 | 49.27 | 56.81 | 52.10 | 45.77 | 30.74 | 9.17 | -8.91 | h | 31.74 | a | ||||||||||
1986 | 4.55 | 1.68 | 20.20 | a | 34.07 | 44.20 | a | 54.33 | 60.90 | 53.74 | 47.41 | a | 36.61 | 15.07 | 12.26 | 32.09 | ||||||||||
1987 | 9.83 | a | 19.04 | 24.84 | 37.07 | 49.90 | a | 56.69 | a | 63.00 | 55.16 | 48.30 | 32.23 | 26.60 | 14.32 | 36.41 | ||||||||||
1988 | -5.06 | -0.72 | 21.48 | 31.30 | 50.03 | b | 59.30 | 61.77 | 58.71 | 47.90 | 30.43 | a | 20.50 | 5.90 | a | 31.80 | ||||||||||
1989 | 5.68 | -6.75 | 15.16 | 31.13 | 43.97 | 53.64 | b | 62.00 | 57.52 | 47.60 | 35.32 | 15.67 | -2.83 | b | 29.84 | |||||||||||
1990 | 12.52 | 9.14 | 22.52 | 32.52 | a | 41.93 | a | 56.52 | a | 56.35 | 56.71 | 49.50 | 32.03 | 23.34 | a | 3.03 | a | 33.01 | ||||||||
1991 | -1.71 | 11.59 | a | 20.80 | a | 34.22 | c | 50.19 | 60.67 | 59.74 | 59.06 | 47.10 | a | 32.68 | 13.79 | a | 8.58 | 33.06 | ||||||||
1992 | 8.20 | a | 16.86 | 21.74 | 29.83 | 45.21 | b | 51.90 | 52.35 | 51.74 | 45.56 | e | 31.70 | a | 23.24 | a | 8.76 | b | 32.26 | |||||||
1993 | 0.77 | e | 5.67 | a | 17.70 | a | 31.62 | a | 46.32 | 53.13 | 59.38 | b | 59.00 | 42.67 | 33.23 | 20.24 | a | 9.29 | 31.58 | |||||||
1994 | -10.55 | b | -1.37 | a | 22.26 | 32.13 | 47.45 | 56.67 | 58.21 | b | 56.81 | 52.20 | 40.39 | 26.03 | a | 12.10 | 32.69 | |||||||||
1995 | 4.30 | a | 4.04 | b | 21.97 | 29.60 | 43.45 | 59.37 | 60.29 | 62.84 | 47.70 | 37.77 | 16.77 | 7.53 | a | 32.97 | ||||||||||
1996 | -6.58 | 4.11 | b | 11.94 | 27.83 | 43.94 | 56.97 | 57.23 | 58.48 | 50.30 | 37.03 | 16.04 | b | 3.77 | a | 30.09 | ||||||||||
1997 | -3.45 | 7.00 | a | 16.74 | 29.87 | 40.29 | 58.33 | 61.13 | 57.87 | 52.13 | 38.71 | 19.71 | b | 19.03 | 33.11 | |||||||||||
1998 | 7.59 | b | 24.22 | a | 21.72 | b | 35.17 | a | 49.94 | 54.87 | 61.06 | 60.29 | 51.90 | 38.38 | b | 26.43 | 12.16 | 36.98 | ||||||||
1999 | 0.50 | a | 15.82 | 22.03 | 34.90 | 46.70 | a | 55.83 | a | 62.00 | 57.97 | 47.67 | 34.17 | b | 26.43 | 12.13 | 34.68 | |||||||||
2000 | 2.37 | a | 13.86 | 27.16 | 31.23 | 46.03 | 50.97 | 59.19 | 58.13 | 44.50 | 40.32 | 22.20 | -6.35 | 32.47 | ||||||||||||
2001 | 7.77 | -6.74 | a | 14.65 | 33.60 | 47.48 | 56.47 | 59.73 | a | 56.87 | a | 45.90 | a | 33.71 | c | 28.87 | g | 13.50 | c | 32.99 | a | |||||
2002 | 12.96 | c | 13.35 | e | 6.87 | h | 27.68 | h | 38.04 | h | 57.17 | g | 61.54 | g | 59.15 | k | 51.80 | e | 28.75 | g | 20.42 | d | 12.92 | f | 24.63 | h |
2003 | -0.33 | m | 0.62 | d | 14.71 | g | 30.77 | h | 42.46 | e | 55.12 | f | 58.81 | d | 57.96 | d | 44.00 | e | 34.36 | i | 17.26 | g | 11.35 | e | 35.87 | f |
2004 | -7.57 | j | 3.76 | h | 22.12 | f | ----- | z | 40.88 | f | 51.16 | e | 54.96 | e | 49.80 | f | 49.65 | d | 35.61 | 25.33 | ----- | z | 43.34 | g | ||
2005 | -4.57 | j | 8.79 | d | ----- | z | ----- | z | 44.29 | 58.64 | b | 60.26 | d | 53.21 | c | 49.96 | g | 36.85 | e | 21.93 | c | 8.20 | a | 36.52 | d | |
2006 | ----- | z | 1.50 | f | 22.80 | f | 38.13 | g | 47.00 | b | 53.59 | a | 61.16 | 57.23 | a | 43.87 | 28.34 | b | 18.21 | a | 15.73 | i | 44.20 | e | ||
2007 | 4.85 | e | -2.13 | e | 21.32 | 30.76 | a | 47.77 | a | 57.80 | 61.00 | 57.23 | 48.17 | 40.35 | 22.07 | 1.65 | 32.57 | |||||||||
2008 | -3.13 | -0.34 | 12.71 | 30.43 | 41.94 | 54.07 | 57.48 | 54.03 | 48.07 | 35.32 | 22.60 | -2.97 | 29.18 | |||||||||||||
2009 | -13.70 | a | 3.07 | 14.39 | 31.83 | 39.71 | 52.37 | 55.45 | 54.06 | 49.20 | 33.61 | 28.87 | 6.55 | 29.62 | ||||||||||||
2010 | 0.29 | 1.21 | 25.81 | 38.60 | 45.52 | 54.13 | 56.87 | 59.73 | a | 45.90 | 36.58 | 21.87 | 4.74 | 32.60 | ||||||||||||
2011 | -3.29 | 1.96 | 12.48 | 32.67 | 45.42 | 54.87 | 64.52 | 59.61 | 46.53 | 39.39 | 22.10 | a | ----- | z | 34.21 | a | ||||||||||
2012 | 12.50 | y | 13.07 | a | 31.29 | 35.97 | a | 49.19 | 57.41 | a | 65.10 | 55.32 | 43.43 | 33.26 | 22.83 | 8.71 | 37.78 | a | ||||||||
2013 | 1.61 | 2.64 | 8.94 | 24.57 | 44.42 | 55.73 | 61.00 | 57.65 | 49.77 | 36.58 | 18.23 | -3.35 | 29.82 | |||||||||||||
2014 | -10.67 | a | -9.46 | 9.60 | a | 28.33 | 44.71 | 57.27 | 57.61 | 59.45 | 48.13 | 35.19 | 12.70 | 13.77 | 28.89 | |||||||||||
2015 | 6.74 | -3.39 | 18.52 | 31.27 | 44.23 | 55.73 | 59.35 | 56.87 | 54.17 | 37.86 | i | ----- | z | ----- | z | 35.94 | c | |||||||||
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.57 | b | 38.13 | a | 30.93 | 7.68 | 32.08 | h | ||
2017 | 5.00 | 14.46 | 17.77 | 35.17 | 44.35 | 54.97 | 59.42 | 54.74 | 50.80 | 37.35 | 19.90 | 6.26 | 33.35 | |||||||||||||
2018 | 1.03 | -5.79 | 17.50 | a | 21.03 | a | 50.39 | 59.23 | 60.87 | 59.04 | h | 49.64 | e | 33.32 | 15.70 | 12.87 | 28.71 | a | ||||||||
2019 | -4.26 | -8.50 | 11.23 | 32.43 | 41.26 | 56.30 | 62.32 | 56.77 | 51.70 | 35.39 | 20.93 | 8.81 | 30.37 | |||||||||||||
2020 | 5.65 | 2.00 | 22.32 | 28.70 | 43.45 | 57.33 | 60.94 | 58.87 | 46.29 | b | 30.55 | 24.83 | 13.10 | 32.84 | ||||||||||||
2021 | 10.06 | -2.14 | 25.58 | 32.57 | 43.68 | 58.57 | 60.55 | 59.19 | 49.17 | 42.23 | 25.60 | 11.19 | 34.69 | |||||||||||||
2022 | -8.29 | -5.29 | 17.16 | 28.76 | a | 48.68 | 57.07 | 61.19 | 58.10 | u | ----- | z | ----- | z | ----- | z | ----- | z | 28.47 | e | ||||||
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.21 | p | 23.84 | 23.84 | k | |
2024 | 9.90 | 20.10 | 20.90 | 34.22 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.97 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.52 | 4.48 | 18.64 | 32.07 | 45.04 | 55.13 | 59.49 | 57.06 | 47.77 | 35.93 | 21.60 | 7.15 | 31.89 | |||||||||||||
S.D. | 6.92 | 8.00 | 5.65 | 3.30 | 3.39 | 2.56 | 2.53 | 2.45 | 2.86 | 3.17 | 4.21 | 6.29 | 1.84 | |||||||||||||
SKEW | -0.05 | 0.43 | -0.13 | -0.50 | 0.08 | -0.38 | -0.50 | 0.07 | -0.10 | -0.09 | -0.55 | -0.17 | 0.56 | |||||||||||||
MAX | 12.96 | 24.22 | 31.29 | 39.30 | 53.48 | 60.67 | 65.10 | 63.84 | 54.17 | 43.35 | 30.93 | 23.84 | 36.98 | |||||||||||||
MIN | -13.70 | -9.46 | 5.52 | 21.03 | 37.48 | 48.60 | 52.35 | 51.74 | 41.23 | 28.34 | 9.17 | -8.29 | 28.89 | |||||||||||||
YRS | 57 | 60 | 57 | 56 | 59 | 59 | 60 | 57 | 60 | 59 | 59 | 57 | 48 |