YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | 4.58 | d | ----- | z | 33.17 | a | 36.88 | w | ----- | z | ----- | z | 49.46 | g | 53.62 | n | 34.95 | i | ----- | z | -2.05 | l | 18.88 | j |
1928 | -1.31 | b | 0.30 | f | 11.97 | a | 23.67 | c | 40.17 | a | 44.44 | c | 55.15 | r | 50.20 | a | 39.48 | c | 28.17 | b | 19.44 | c | -11.71 | q | 28.47 | c |
1929 | -23.45 | -11.48 | a | 17.25 | c | 28.44 | c | 35.60 | f | 46.19 | d | 53.88 | e | 50.10 | b | 37.90 | a | 29.08 | f | 10.00 | f | 0.70 | a | 22.17 | c | |
1930 | -16.92 | f | 8.40 | c | 12.53 | a | 30.89 | c | 39.19 | d | 50.20 | e | 55.94 | o | 52.45 | b | 39.71 | b | 31.78 | d | 14.71 | b | 5.66 | b | 28.55 | b |
1931 | 4.00 | a | 12.25 | 14.97 | 28.24 | a | 37.63 | a | 52.26 | c | 53.81 | d | 50.66 | b | 45.34 | a | 34.41 | d | 17.79 | b | 8.55 | 29.99 | ||||
1932 | -3.89 | d | -3.26 | b | -1.62 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -8.20 | y | ----- | z | -3.57 | j |
1933 | ----- | z | -27.91 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.46 | q | ----- | z | -4.00 | x | -23.00 | y | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | -11.25 | o | 11.27 | f | 14.65 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | -28.73 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 59.62 | w | 57.23 | a | 43.52 | a | 31.80 | a | 9.93 | 12.90 | 31.08 | g | ||
1960 | -3.41 | b | 0.24 | 5.16 | 29.93 | 39.97 | 49.53 | 53.58 | 55.45 | 44.40 | 34.13 | 19.87 | -0.31 | b | 27.38 | |||||||||||
1961 | -6.48 | ----- | z | 24.35 | 25.27 | 37.58 | 49.76 | a | 53.45 | 52.52 | 43.44 | c | 35.94 | 20.57 | -1.21 | b | 30.47 | a | ||||||||
1962 | -12.72 | b | -5.32 | 15.20 | a | 28.13 | 44.77 | 54.57 | 56.16 | 55.16 | 43.23 | 37.16 | 26.87 | 4.20 | a | 28.95 | ||||||||||
1963 | -9.68 | -4.18 | 17.87 | 31.97 | 40.65 | 58.20 | 58.29 | 54.93 | a | 48.30 | 43.81 | 21.21 | a | -1.40 | a | 30.00 | ||||||||||
1964 | 2.65 | 4.34 | 6.17 | a | 31.83 | 44.74 | 51.80 | 60.81 | 52.42 | 43.33 | 34.29 | 21.43 | -4.19 | 29.14 | ||||||||||||
1965 | -12.90 | -5.89 | 0.87 | 33.90 | 43.29 | 51.60 | 55.35 | 53.19 | 40.43 | 34.44 | d | 17.87 | 12.45 | 27.05 | ||||||||||||
1966 | -18.30 | a | -5.39 | 19.23 | 29.23 | 39.42 | 52.33 | 60.03 | 53.42 | 45.93 | 32.97 | a | 14.87 | 0.48 | 27.02 | |||||||||||
1967 | -3.10 | -11.86 | 13.58 | 30.00 | 35.52 | 49.70 | 52.39 | 53.16 | 46.03 | 32.55 | 20.23 | 6.13 | 27.03 | |||||||||||||
1968 | -6.23 | -4.62 | 21.84 | 30.93 | 37.26 | 52.27 | 53.87 | 52.55 | 45.53 | 34.97 | 22.40 | 0.94 | 28.48 | |||||||||||||
1969 | -10.97 | 1.25 | 4.03 | 33.60 | 41.45 | 45.80 | 54.55 | 56.87 | 47.07 | 32.43 | a | 20.69 | a | 5.81 | 27.72 | |||||||||||
1970 | -10.81 | -5.29 | 3.94 | 28.63 | 42.16 | 55.63 | 58.03 | 52.84 | 46.37 | 35.26 | 18.63 | -2.40 | a | 26.92 | ||||||||||||
1971 | -15.80 | a | -1.21 | 14.16 | 31.03 | 38.90 | 55.10 | 52.03 | 53.06 | 45.17 | 38.45 | 20.63 | 2.76 | b | 27.86 | |||||||||||
1972 | -11.87 | -9.03 | 11.16 | 29.90 | 47.35 | 52.37 | 53.19 | 56.26 | 42.90 | 32.06 | 20.03 | -6.61 | 26.48 | |||||||||||||
1973 | 0.23 | 5.07 | 29.84 | 30.30 | 40.81 | 51.33 | 54.39 | 57.46 | g | 45.27 | 40.77 | 18.37 | 3.74 | 29.10 | a | |||||||||||
1974 | -10.23 | -2.25 | 12.06 | 30.63 | 41.39 | 51.20 | 60.10 | 52.90 | 40.13 | 34.68 | 22.67 | 11.19 | 28.71 | |||||||||||||
1975 | -1.81 | -1.11 | 6.45 | 29.07 | 44.94 | 52.97 | 60.32 | 55.52 | 41.07 | 37.90 | 22.47 | 4.71 | 29.37 | |||||||||||||
1976 | -5.39 | 10.24 | 10.81 | 33.97 | 39.55 | 55.47 | 54.00 | 56.71 | 44.40 | 26.32 | 12.70 | -6.93 | a | 27.65 | ||||||||||||
1977 | -15.16 | 4.61 | 22.13 | 34.57 | 54.19 | 52.13 | 57.68 | 48.42 | 48.47 | 34.45 | 15.50 | -2.77 | 29.52 | |||||||||||||
1978 | -10.97 | -9.61 | 10.87 | 32.13 | 46.68 | 50.73 | 56.61 | 54.97 | 49.93 | 34.06 | 11.63 | -6.48 | 26.71 | |||||||||||||
1979 | -16.84 | -12.29 | 10.70 | a | 25.73 | 37.71 | 50.30 | 57.35 | 52.55 | 44.68 | b | 32.90 | 18.57 | 12.48 | b | 26.15 | ||||||||||
1980 | -4.87 | -2.66 | 8.48 | 33.80 | 44.29 | 51.27 | 55.23 | 52.39 | 44.60 | 32.26 | 23.67 | 2.00 | 28.37 | |||||||||||||
1981 | 1.77 | 10.50 | 21.32 | 31.40 | 41.77 | 51.87 | 57.55 | 56.68 | 44.40 | 35.26 | 27.70 | 3.81 | 32.00 | |||||||||||||
1982 | -18.00 | 0.82 | 14.61 | 28.60 | 45.90 | 45.27 | 56.68 | 54.03 | 44.77 | 38.23 | 15.73 | 12.19 | 28.24 | |||||||||||||
1983 | 4.06 | 13.75 | 23.71 | 30.30 | 37.71 | 52.97 | 60.84 | 59.52 | 47.67 | 36.13 | 25.32 | b | -10.23 | 31.81 | ||||||||||||
1984 | -2.42 | 17.28 | 14.61 | 32.13 | 37.87 | 54.07 | 54.97 | 57.71 | 39.97 | 38.32 | 20.72 | a | -0.23 | a | 30.42 | |||||||||||
1985 | -5.90 | -2.25 | 23.27 | a | 33.90 | 46.39 | 48.46 | b | 53.90 | 52.65 | 43.73 | 33.72 | b | 6.33 | -9.81 | 27.03 | ||||||||||
1986 | 3.42 | 0.36 | 20.06 | 33.37 | 43.87 | 53.93 | 59.52 | 51.06 | 45.43 | 33.84 | 13.10 | 10.32 | 30.69 | |||||||||||||
1987 | 6.35 | 19.46 | 22.13 | a | 35.62 | a | 48.32 | 54.33 | 58.87 | 52.52 | 46.67 | 31.97 | 22.80 | 11.35 | 34.20 | |||||||||||
1988 | -5.90 | a | -4.55 | 19.48 | 28.33 | 49.77 | 56.57 | 57.45 | 56.55 | 44.40 | 30.77 | 19.00 | 2.63 | a | 29.54 | |||||||||||
1989 | -1.90 | -13.07 | 8.42 | 31.50 | 42.97 | b | 48.07 | 58.39 | 54.26 | 43.73 | 30.65 | 11.53 | -7.10 | 25.62 | ||||||||||||
1990 | 9.19 | 5.79 | 20.81 | 29.10 | 39.27 | a | 53.73 | 54.10 | 55.23 | 47.87 | 30.39 | 20.13 | -1.71 | 30.32 | ||||||||||||
1991 | -7.87 | 7.36 | 19.16 | 33.40 | 48.68 | 57.17 | 56.81 | 56.55 | 45.43 | 28.23 | 17.60 | 12.03 | 31.21 | |||||||||||||
1992 | 7.17 | a | 12.83 | 23.06 | 29.40 | 44.68 | 48.10 | 50.58 | 50.90 | 43.73 | 30.16 | 20.10 | a | -0.90 | 29.98 | |||||||||||
1993 | -4.87 | -2.18 | 13.10 | b | 29.33 | 42.23 | 50.87 | 55.52 | 55.06 | 41.10 | 30.29 | 16.62 | a | 4.59 | b | 27.64 | ||||||||||
1994 | -15.00 | -6.92 | b | 20.00 | 30.50 | 44.76 | b | 54.77 | 55.00 | 51.84 | 49.03 | 40.07 | b | 25.10 | a | 13.39 | 30.21 | |||||||||
1995 | -1.00 | -2.71 | 16.52 | 26.63 | 41.61 | 58.40 | 56.58 | 57.63 | a | 43.13 | 35.42 | 11.40 | 0.42 | 28.67 | ||||||||||||
1996 | -10.07 | d | 2.69 | c | 9.21 | b | 26.89 | b | 43.90 | b | 56.00 | a | 58.42 | 60.16 | 48.83 | a | 35.87 | 10.26 | c | 0.48 | d | 28.55 | ||||
1997 | -6.54 | c | 3.42 | b | 7.39 | 26.77 | 38.33 | a | 55.73 | 57.71 | 54.26 | 48.47 | 37.45 | 16.30 | 15.90 | 29.60 | ||||||||||
1998 | 2.50 | a | 24.11 | 16.81 | 34.13 | 47.47 | a | 49.41 | a | 57.94 | 56.74 | 48.93 | 34.10 | a | 22.00 | c | 9.44 | d | 33.63 | |||||||
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.97 | a | ----- | z | ----- | z | 32.97 | k |
2010 | 0.90 | -0.43 | 25.87 | 36.17 | a | 45.39 | 53.00 | 58.68 | 58.45 | 44.57 | 37.00 | 18.63 | 2.35 | 31.72 | ||||||||||||
2011 | -7.68 | 1.68 | 12.58 | 31.60 | 43.61 | 54.37 | 61.23 | 57.03 | 44.53 | 38.81 | 22.00 | 13.97 | 31.14 | |||||||||||||
2012 | 7.77 | 8.97 | 29.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.79 | b | ----- | z | ----- | z | ----- | z | 20.19 | h | |||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | 43.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.61 | k | |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.77 | 3.77 | k | |
2017 | 3.29 | 10.77 | b | 17.23 | 31.83 | 42.87 | 52.73 | 57.26 | 52.58 | 48.27 | 35.00 | a | 16.10 | a | 1.84 | 30.81 | ||||||||||
2018 | -1.52 | -7.88 | b | 17.38 | b | 22.20 | 47.42 | 55.73 | h | 58.29 | ----- | z | ----- | z | ----- | z | 13.25 | v | 9.90 | 20.83 | e | |||||
2019 | -5.24 | b | -8.89 | 7.20 | a | 29.78 | g | 38.19 | ----- | z | 58.86 | b | 53.45 | k | 50.46 | b | 33.93 | b | 17.20 | e | -0.60 | k | 23.96 | d | ||
2020 | 1.94 | -0.90 | 16.10 | 26.50 | 40.32 | 57.40 | 60.84 | 56.59 | d | 44.80 | 28.65 | 21.17 | f | 13.04 | h | 33.22 | b | |||||||||
2021 | 8.11 | d | -2.50 | d | 21.92 | f | 28.76 | a | 36.77 | 51.83 | 57.55 | ----- | z | ----- | z | 37.38 | g | 22.87 | 0.19 | 25.45 | d | |||||
2022 | -13.94 | -9.75 | 14.71 | 26.10 | 43.94 | 54.07 | 58.74 | 55.36 | q | 49.30 | 33.35 | 19.70 | 2.74 | 25.36 | a | |||||||||||
2023 | 3.94 | 0.79 | 5.87 | ----- | z | ----- | z | ----- | z | 56.17 | g | 56.58 | ----- | z | ----- | z | 23.50 | ----- | z | 18.13 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -4.84 | 0.64 | 15.11 | 30.26 | 42.49 | 52.25 | 56.68 | 54.39 | 44.72 | 34.17 | 18.69 | 3.27 | 29.11 | |||||||||||||
S.D. | 7.77 | 8.44 | 6.73 | 3.04 | 3.91 | 3.27 | 2.62 | 2.61 | 3.25 | 3.41 | 4.55 | 6.62 | 1.99 | |||||||||||||
SKEW | -0.18 | 0.63 | 0.05 | -0.35 | 0.49 | -0.34 | -0.18 | 0.03 | -0.61 | 0.24 | -0.51 | -0.00 | 0.50 | |||||||||||||
MAX | 9.19 | 24.11 | 29.84 | 36.17 | 54.19 | 58.40 | 61.23 | 60.16 | 50.46 | 43.81 | 27.70 | 15.90 | 34.20 | |||||||||||||
MIN | -23.45 | -13.07 | 0.87 | 22.20 | 35.52 | 44.44 | 50.58 | 48.42 | 34.79 | 26.32 | 6.33 | -10.23 | 25.62 | |||||||||||||
YRS | 53 | 53 | 52 | 51 | 51 | 49 | 49 | 48 | 51 | 50 | 50 | 50 | 41 |