YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.84 | 57.30 | a | 50.77 | 32.60 | a | 22.10 | 3.74 | 37.56 | f | ||||
1949 | -4.48 | -6.50 | 16.58 | 33.27 | 42.45 | 52.10 | a | 57.77 | 57.23 | 42.07 | a | 35.39 | 26.00 | 1.29 | 29.43 | |||||||||||
1950 | -16.06 | -2.11 | 13.81 | 26.87 | 42.30 | a | 52.30 | 55.63 | a | 52.16 | 46.55 | a | 35.12 | g | ----- | z | ----- | z | 30.16 | c | ||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.94 | 42.93 | 36.52 | 24.70 | 7.87 | 33.59 | g | |||||
1963 | -8.29 | 2.43 | 21.23 | 32.43 | 42.42 | 56.63 | 58.29 | 56.35 | 48.33 | 41.77 | 22.60 | -1.10 | 31.09 | |||||||||||||
1964 | 4.90 | 10.28 | 8.71 | 32.73 | 43.90 | 50.93 | 59.90 | 52.35 | 41.83 | 33.19 | 16.53 | -4.52 | 29.23 | |||||||||||||
1965 | -8.97 | -0.75 | 6.55 | 31.93 | 43.00 | 51.53 | 58.71 | 54.61 | 38.33 | 35.65 | 16.20 | 14.10 | 28.41 | |||||||||||||
1966 | -13.74 | 0.68 | 24.45 | b | 29.60 | 40.23 | 52.13 | 60.48 | 52.32 | 43.50 | 31.39 | 13.97 | 3.75 | c | 28.23 | |||||||||||
1967 | 2.42 | -1.25 | 20.16 | 30.57 | 39.26 | 52.43 | 52.03 | a | 52.19 | 43.90 | 32.06 | 17.93 | 4.55 | 28.86 | ||||||||||||
1968 | -1.45 | 0.90 | 23.61 | 30.80 | 39.84 | 54.30 | 55.77 | 51.84 | 45.57 | 33.23 | 22.45 | a | 1.48 | 29.86 | ||||||||||||
1969 | -9.27 | a | 8.86 | 9.23 | 34.33 | 41.58 | 47.59 | a | 59.77 | 56.74 | 46.10 | 31.06 | 23.38 | a | 7.77 | a | 29.76 | |||||||||
1970 | -7.94 | 1.93 | 10.16 | 30.07 | 43.73 | a | 55.50 | 57.55 | 56.03 | 47.23 | 32.94 | 20.30 | 4.00 | 29.29 | ||||||||||||
1971 | -6.94 | 2.36 | 19.71 | 33.83 | 39.61 | 59.00 | 53.61 | 55.68 | 44.83 | 36.26 | 20.17 | a | 0.30 | a | 29.87 | |||||||||||
1972 | -9.34 | b | -1.36 | d | 18.80 | a | 33.07 | b | ----- | z | 51.50 | 53.29 | c | 54.42 | 41.68 | b | 27.23 | 17.69 | a | -6.40 | a | 25.51 | a | |||
1973 | 2.38 | e | 8.08 | b | 27.00 | 30.50 | 40.29 | 52.10 | 55.59 | b | 57.90 | a | 42.40 | 37.39 | 17.96 | e | -0.41 | b | 30.93 | |||||||
1974 | -5.07 | a | 1.36 | 15.77 | 30.76 | a | 40.10 | a | 48.33 | c | 57.70 | a | 50.33 | a | 39.05 | h | 31.39 | 19.73 | 5.30 | a | 26.88 | a | ||||
1975 | -1.57 | c | -3.58 | b | 7.61 | c | 25.47 | 43.57 | a | 52.87 | 59.68 | 52.42 | 38.00 | a | 33.96 | c | 17.23 | d | 5.10 | a | 27.56 | |||||
1976 | -2.48 | 11.46 | c | 9.93 | d | 30.77 | 38.74 | 50.40 | 50.84 | 51.97 | b | 38.59 | a | 21.60 | f | 7.00 | c | -4.19 | 25.73 | a | ||||||
1977 | -14.81 | 7.87 | e | 20.03 | b | 33.36 | b | 46.32 | 49.45 | a | 54.58 | 45.13 | 39.59 | a | 26.66 | b | 12.97 | -0.61 | 26.71 | |||||||
1978 | -16.55 | -6.07 | 13.29 | 31.90 | 43.33 | a | 50.70 | 54.83 | b | 49.45 | ----- | z | 26.65 | 5.72 | a | ----- | z | 25.33 | b | |||||||
1979 | -18.35 | -18.10 | g | 7.77 | a | 25.88 | d | 33.22 | h | 47.90 | ----- | z | 45.96 | f | 38.19 | i | 28.33 | v | 12.33 | c | 7.21 | b | 13.79 | f | ||
1980 | ----- | z | -11.00 | t | ----- | z | ----- | z | ----- | z | ----- | z | 55.04 | d | 53.45 | b | 41.70 | 30.96 | f | 24.43 | i | 5.39 | 38.89 | h | ||
1981 | 2.12 | g | 15.25 | l | 19.36 | c | 33.88 | d | 40.53 | a | 48.04 | b | 58.59 | d | 52.90 | j | 41.80 | 31.13 | a | 23.08 | e | -2.17 | a | 32.69 | c | |
1982 | -18.80 | f | -12.12 | k | ----- | z | 26.50 | b | 43.33 | a | 45.46 | b | ----- | z | 51.24 | b | 39.57 | b | 32.07 | c | 11.15 | d | 10.93 | a | 32.53 | d |
1983 | 4.96 | e | 11.76 | c | 19.82 | c | 26.90 | 33.03 | a | 49.84 | e | 57.90 | b | 52.81 | 40.16 | e | 32.31 | e | 23.47 | -11.23 | a | 28.48 | ||||
1984 | 0.21 | c | 15.38 | c | 11.00 | b | 30.47 | 38.57 | h | 50.83 | a | 53.23 | a | 49.63 | d | 34.18 | b | ----- | z | 18.32 | b | -0.61 | 26.26 | b | ||
1985 | -7.21 | c | -0.54 | b | 22.97 | b | 32.77 | 45.84 | 48.66 | a | 55.63 | a | 52.00 | 44.27 | 31.03 | b | 5.27 | -5.03 | a | 27.14 | ||||||
1986 | 4.52 | 0.46 | 25.18 | c | 31.21 | a | 43.30 | h | 54.57 | 58.77 | a | 51.00 | 45.10 | 33.10 | a | 12.17 | 11.57 | a | 29.78 | a | ||||||
1987 | 10.40 | a | 19.50 | 21.07 | b | 35.17 | a | 47.06 | 54.87 | 60.59 | b | 53.23 | a | 44.67 | 27.34 | b | 22.47 | 14.58 | 34.25 | |||||||
1988 | -4.56 | d | -1.97 | 18.68 | 26.75 | b | 48.40 | a | 59.60 | 59.55 | 55.57 | c | 43.50 | 27.87 | 17.93 | 6.45 | 29.82 | |||||||||
1989 | 3.17 | b | -7.52 | a | 12.17 | a | 31.10 | 42.37 | a | 50.50 | 60.87 | 56.40 | a | 42.67 | 29.29 | 14.10 | -6.20 | a | 27.41 | |||||||
1990 | 12.93 | a | 3.37 | a | 21.42 | 28.23 | 40.61 | 53.97 | a | 56.29 | 54.74 | 46.77 | 28.26 | 19.40 | -2.42 | 30.30 | ||||||||||
1991 | -4.19 | 12.29 | 19.68 | 34.03 | 48.58 | 58.17 | 57.68 | 57.35 | 44.00 | 27.35 | 12.87 | 9.30 | a | 31.43 | ||||||||||||
1992 | 8.35 | 16.90 | 23.39 | 29.23 | 43.84 | 49.79 | a | 51.90 | a | 50.84 | 40.86 | a | 29.71 | 21.37 | 1.55 | 30.64 | ||||||||||
1993 | -4.90 | -0.68 | 16.42 | 29.00 | a | 40.73 | a | 49.57 | 55.58 | 55.00 | a | 38.97 | 26.90 | a | 16.03 | 6.67 | a | 27.44 | ||||||||
1994 | -13.23 | a | -9.19 | a | 19.32 | 29.13 | 44.39 | 53.80 | 54.61 | 52.97 | 46.67 | 37.10 | 22.33 | 8.48 | 28.87 | |||||||||||
1995 | 2.52 | b | 5.68 | 15.57 | a | 27.93 | 41.81 | 56.43 | 58.13 | a | 58.53 | a | 42.17 | a | 32.34 | b | 13.80 | 5.77 | 30.06 | |||||||
1996 | -9.77 | 3.10 | 6.83 | b | 26.50 | 41.43 | a | 54.00 | 55.90 | 55.87 | 45.87 | 30.68 | c | 7.30 | -2.19 | 26.29 | ||||||||||
1997 | -8.65 | 3.46 | b | 11.35 | 25.03 | 38.97 | a | 55.50 | 59.90 | a | 54.33 | a | 47.40 | 33.06 | 16.23 | 16.06 | 29.39 | |||||||||
1998 | 2.35 | 19.36 | 15.77 | 34.83 | 46.19 | j | 51.62 | a | 58.58 | 57.90 | a | 48.20 | 35.60 | a | 22.67 | 10.55 | b | 32.49 | a | |||||||
1999 | -5.23 | a | 12.50 | 21.74 | 32.47 | 45.58 | 53.70 | 59.39 | 55.60 | a | 44.17 | 29.69 | b | 22.68 | b | 12.10 | 32.03 | |||||||||
2000 | 0.19 | 10.04 | a | 24.68 | 29.32 | b | 44.03 | 51.64 | b | 58.55 | b | 55.86 | b | 42.59 | a | 34.55 | b | 16.24 | a | -5.74 | 30.16 | |||||
2001 | 5.44 | d | -5.48 | c | 15.70 | a | 31.25 | b | 46.46 | e | 54.57 | 60.35 | 57.53 | a | 47.19 | c | 31.10 | b | 28.28 | a | 8.97 | b | 31.78 | |||
2002 | 5.64 | f | 11.50 | f | 6.19 | 28.00 | b | 35.93 | a | ----- | z | ----- | z | 55.61 | 46.70 | g | 24.68 | l | 19.93 | 9.34 | b | 25.84 | f | |||
2003 | -3.61 | c | -3.77 | b | 12.96 | d | 31.23 | 42.87 | a | 53.79 | f | 57.67 | g | 60.17 | h | 43.93 | a | 33.15 | d | ----- | z | ----- | z | 22.40 | e | |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.71 | x | 50.17 | 35.23 | 23.57 | 12.38 | b | 30.33 | h | |||
2005 | -3.63 | a | 8.07 | a | 17.30 | a | 35.41 | a | 41.82 | c | 58.80 | 60.87 | 57.06 | 49.73 | 35.43 | a | 23.60 | 11.48 | 33.00 | |||||||
2006 | 18.10 | a | 7.16 | c | 21.24 | b | 36.07 | a | 46.61 | 55.14 | b | 61.50 | a | 58.13 | 46.32 | b | 28.87 | 19.48 | a | 12.30 | a | 34.24 | ||||
2007 | -0.39 | -2.00 | b | 24.67 | d | 30.48 | a | 47.73 | a | 57.72 | a | 61.45 | 55.45 | 47.33 | 35.86 | j | 20.45 | a | -0.05 | j | 34.29 | b | ||||
2008 | -3.45 | b | -0.15 | b | 15.61 | c | 26.23 | 38.45 | 51.76 | a | 58.30 | d | 55.65 | 45.59 | a | 31.83 | b | 20.83 | a | -3.57 | c | 28.09 | ||||
2009 | -6.43 | c | 0.93 | a | 12.07 | b | 30.93 | c | 41.62 | b | 51.41 | a | 55.03 | a | 53.87 | 50.30 | c | 33.69 | e | 24.44 | c | 2.59 | b | 29.20 | ||
2010 | -1.25 | c | -3.44 | a | 24.10 | a | 35.38 | a | 45.26 | 55.72 | a | 60.12 | f | ----- | z | 43.41 | a | 35.71 | c | ----- | z | ----- | z | 29.36 | d | |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | 39.53 | l | 52.71 | i | 63.26 | l | 57.30 | h | ----- | z | 37.21 | g | 18.23 | 11.89 | c | 15.06 | j | |
2012 | 8.35 | 7.97 | 27.48 | b | 33.86 | a | 45.07 | c | 56.60 | 63.43 | a | 53.10 | 39.69 | a | 31.00 | 18.97 | 5.39 | 32.58 | ||||||||
2013 | 1.50 | a | 3.11 | 3.80 | a | 21.69 | a | 37.47 | p | 51.36 | p | ----- | z | 53.79 | l | ----- | z | ----- | z | ----- | z | ----- | z | 7.52 | h | |
2014 | -4.10 | j | -4.64 | c | 10.43 | c | 23.08 | f | 42.26 | d | 56.00 | c | 56.31 | b | 56.88 | e | 45.23 | 35.07 | b | 12.00 | a | ----- | z | 34.39 | c | |
2015 | 5.73 | i | ----- | z | ----- | z | ----- | z | 40.40 | a | ----- | z | ----- | z | ----- | z | 45.72 | a | 35.73 | a | ----- | z | 14.56 | d | 34.10 | h |
2016 | 11.00 | u | 14.00 | f | ----- | z | ----- | z | 45.30 | d | 55.44 | e | 58.28 | b | 56.19 | d | 47.90 | a | 36.23 | a | 28.11 | b | 4.27 | a | 41.46 | d |
2017 | 8.11 | d | 14.33 | a | 16.42 | e | 30.29 | f | 41.91 | i | 53.37 | 57.93 | b | 54.27 | a | 47.80 | 33.61 | 17.39 | b | 8.90 | b | 31.21 | b | |||
2018 | 1.75 | c | -4.04 | 15.62 | e | 23.88 | e | 47.63 | a | 59.69 | a | 58.96 | e | 52.77 | e | 46.35 | g | 27.89 | c | 14.36 | e | 11.71 | c | 28.20 | a | |
2019 | 4.62 | j | -10.70 | h | 9.93 | c | 30.85 | c | ----- | z | 54.63 | 60.28 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.92 | h | |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | 28.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.40 | k | |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -2.43 | 3.40 | 16.50 | 30.42 | 42.68 | 53.06 | 57.53 | 54.29 | 44.11 | 32.34 | 18.25 | 4.59 | 29.76 | |||||||||||||
S.D. | 7.89 | 7.25 | 6.08 | 3.24 | 3.21 | 3.33 | 2.76 | 2.71 | 3.53 | 3.33 | 5.35 | 6.55 | 1.99 | |||||||||||||
SKEW | 0.18 | 0.48 | -0.16 | -0.42 | -0.37 | 0.08 | -0.41 | -0.79 | -0.33 | 0.14 | -0.54 | -0.28 | 0.50 | |||||||||||||
MAX | 18.10 | 19.50 | 27.48 | 36.07 | 48.58 | 59.69 | 63.43 | 58.53 | 50.77 | 41.77 | 28.28 | 16.06 | 34.25 | |||||||||||||
MIN | -18.35 | -9.19 | 3.80 | 21.69 | 33.03 | 45.46 | 50.84 | 45.13 | 34.18 | 26.65 | 5.27 | -11.23 | 26.29 | |||||||||||||
YRS | 49 | 49 | 53 | 53 | 48 | 52 | 51 | 52 | 53 | 51 | 54 | 53 | 34 |