YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.77 | 40.70 | 36.31 | b | 20.60 | -3.68 | 28.94 | g | ||||
1935 | -14.47 | a | 12.32 | 13.81 | 27.20 | 38.65 | 45.87 | 61.33 | a | 52.06 | 40.30 | 30.74 | 5.20 | 0.29 | 26.11 | |||||||||||
1936 | -19.29 | -23.54 | a | 13.03 | a | 22.17 | a | 39.93 | a | 46.07 | 55.33 | a | 44.45 | 38.50 | 19.77 | 12.89 | k | 1.68 | 21.65 | a | ||||||
1937 | -19.74 | -4.19 | b | 11.55 | 29.34 | a | 44.17 | a | 56.12 | m | 57.93 | a | 56.38 | e | 42.13 | 29.20 | a | ----- | z | ----- | z | 27.42 | c | |||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.21 | b | ----- | z | ----- | z | ----- | z | ----- | z | 10.74 | c | 3.10 | b | 21.69 | i |
1939 | -5.77 | -17.23 | b | 8.95 | j | 25.87 | g | 42.33 | a | 47.28 | a | 57.29 | 54.37 | a | 43.63 | c | 28.93 | a | 22.64 | e | 13.93 | c | 28.74 | b | ||
1940 | -7.63 | d | 3.89 | b | 4.73 | e | 27.03 | a | 41.97 | a | 48.45 | a | 56.84 | 56.32 | 48.28 | a | 40.00 | a | 15.36 | b | 7.62 | b | 28.57 | |||
1941 | -2.61 | c | -2.78 | e | 11.48 | f | 32.50 | b | 44.73 | a | 54.83 | 59.52 | 55.48 | 45.53 | 32.10 | 19.74 | c | 7.39 | 31.49 | a | ||||||
1942 | 5.06 | -3.42 | b | 18.50 | a | 34.29 | b | 38.26 | 50.20 | 55.03 | 54.19 | 42.07 | a | 33.26 | 12.50 | -5.81 | 27.84 | |||||||||
1943 | -14.90 | a | -1.61 | 4.10 | 30.47 | 39.13 | 50.53 | 60.06 | 54.68 | 41.97 | 32.58 | 19.38 | a | 5.03 | a | 26.79 | ||||||||||
1944 | 6.58 | -5.08 | c | 4.65 | 28.23 | 44.56 | d | 52.90 | a | 55.97 | 55.26 | 47.47 | 33.45 | 25.72 | a | 2.66 | b | 29.36 | ||||||||
1945 | -0.20 | a | -3.76 | c | 21.80 | a | 27.37 | 34.97 | a | 48.00 | 54.23 | 45.26 | 36.69 | a | 29.77 | 10.92 | d | -3.16 | 25.16 | |||||||
1946 | -9.10 | b | -8.00 | 18.03 | ----- | z | 40.58 | 49.80 | 56.32 | 52.39 | 42.79 | a | 30.29 | 12.57 | -5.13 | a | 25.50 | a | ||||||||
1947 | -1.69 | b | -3.96 | a | 14.47 | a | 29.07 | 35.97 | 47.13 | 51.26 | 52.35 | 39.10 | 36.42 | 12.89 | b | -3.87 | a | 25.76 | ||||||||
1948 | -8.76 | b | -10.00 | 6.23 | a | 28.10 | 41.60 | a | 48.45 | a | 55.94 | 55.55 | 49.03 | 34.29 | 19.60 | -1.26 | 26.56 | |||||||||
1949 | -8.71 | -13.18 | 8.23 | 32.63 | 41.23 | 51.63 | 55.63 | a | 54.87 | 40.13 | 32.64 | c | 23.41 | a | -2.20 | a | 26.36 | |||||||||
1950 | -20.48 | -7.11 | a | 7.48 | 22.43 | 41.10 | a | 49.21 | a | 55.58 | 50.23 | a | 43.48 | c | 34.90 | a | 11.10 | -2.70 | a | 23.77 | ||||||
1951 | -7.93 | a | 0.07 | 3.58 | e | 26.35 | m | 42.87 | a | 46.86 | a | 52.43 | a | 51.90 | a | 41.97 | a | 31.03 | 11.56 | c | ----- | z | 27.43 | b | ||
1952 | ----- | z | ----- | z | ----- | z | 44.42 | r | 41.29 | 53.79 | a | 54.81 | 53.45 | 45.77 | 29.68 | 21.54 | b | 9.52 | 38.73 | d | ||||||
1953 | -1.45 | 2.57 | 16.23 | 26.67 | 41.39 | 51.62 | a | 55.42 | 55.70 | a | 44.27 | 39.13 | 25.89 | b | 5.97 | 30.28 | ||||||||||
1954 | -13.84 | 18.00 | a | 14.97 | 26.43 | 38.03 | 51.90 | 57.61 | 52.97 | 45.66 | a | 33.77 | 24.90 | 12.37 | a | 30.23 | ||||||||||
1955 | -4.00 | -4.57 | 1.26 | 37.03 | 45.87 | 53.40 | 60.03 | 57.29 | 42.73 | 34.57 | a | 8.79 | a | -8.57 | a | 26.99 | ||||||||||
1956 | -6.67 | a | -6.14 | 6.16 | 23.13 | 38.87 | a | 55.90 | a | 54.52 | 53.87 | 40.70 | 34.81 | 20.07 | a | 1.67 | a | 26.41 | ||||||||
1957 | ----- | z | 0.61 | 14.55 | 29.72 | a | 40.81 | 48.23 | 59.42 | 55.61 | 43.80 | 35.52 | 19.17 | a | 8.20 | a | 32.33 | a | ||||||||
1958 | 6.13 | 0.04 | 17.83 | b | 31.27 | 41.35 | 46.62 | a | 53.90 | 52.71 | 44.87 | 34.61 | 16.90 | -5.61 | 28.38 | |||||||||||
1959 | -11.35 | -5.82 | 16.52 | 28.77 | 40.32 | 52.43 | 56.55 | 56.42 | 44.03 | 29.10 | 11.30 | 15.39 | 27.80 | |||||||||||||
1960 | -4.58 | -0.34 | 6.19 | 29.41 | a | 40.97 | 50.31 | a | 56.58 | 56.77 | 47.53 | 34.61 | 20.07 | -1.19 | 28.03 | |||||||||||
1961 | -3.94 | 5.54 | 21.39 | 25.53 | 38.84 | 53.52 | e | 56.42 | 56.61 | 43.03 | 34.21 | b | 18.13 | -3.13 | 28.85 | |||||||||||
1962 | -8.81 | -7.18 | 11.10 | 25.00 | 42.77 | 55.28 | a | 55.26 | 55.06 | 42.20 | 38.33 | a | 23.43 | 4.65 | 28.09 | |||||||||||
1963 | -8.90 | -1.57 | 15.55 | 29.93 | 38.55 | 57.83 | 59.90 | 56.29 | 47.13 | 43.26 | 21.07 | -2.29 | 29.73 | |||||||||||||
1964 | 2.29 | 5.66 | 5.45 | 31.57 | 43.77 | 47.93 | 58.29 | 50.35 | 40.90 | 33.35 | 19.57 | -5.52 | 27.80 | |||||||||||||
1965 | -10.19 | -4.11 | a | 4.39 | 31.70 | 41.00 | 50.77 | 54.29 | 52.42 | 37.37 | 36.52 | 14.63 | 8.32 | 26.42 | ||||||||||||
1966 | -19.39 | -8.75 | 17.19 | 27.27 | 37.45 | 50.57 | 58.97 | 53.03 | 44.43 | 31.81 | 11.37 | -1.26 | 25.22 | |||||||||||||
1967 | -3.48 | -12.21 | 12.10 | 25.83 | 35.81 | 50.67 | 53.35 | 50.71 | 46.47 | 33.52 | 20.03 | 5.52 | 26.53 | |||||||||||||
1968 | -6.23 | -3.72 | 19.97 | 29.83 | 38.58 | 50.87 | 54.10 | 52.16 | 45.97 | 33.74 | 21.83 | 1.73 | a | 28.24 | ||||||||||||
1969 | -11.39 | 2.21 | 6.32 | 32.53 | 40.61 | 45.00 | 55.35 | 57.13 | 45.63 | 30.26 | 19.73 | 6.35 | 27.48 | |||||||||||||
1970 | -9.00 | -4.50 | 0.90 | 27.57 | 39.39 | 55.73 | 58.06 | 53.32 | 46.10 | 33.74 | 19.10 | -3.60 | a | 26.40 | ||||||||||||
1971 | -12.71 | 2.36 | 13.68 | 29.60 | 39.71 | 54.73 | 52.55 | 54.42 | 45.40 | 36.52 | 17.97 | -0.16 | 27.84 | |||||||||||||
1972 | -10.55 | -5.93 | 13.42 | 29.90 | a | 47.03 | 52.37 | 53.00 | 55.45 | 42.73 | 30.97 | 17.63 | -4.19 | 26.82 | ||||||||||||
1973 | 3.84 | 3.61 | 27.93 | a | 28.60 | 41.42 | 53.40 | 55.26 | 57.65 | 45.43 | 40.26 | 15.03 | -0.10 | 31.03 | ||||||||||||
1974 | -12.17 | b | -3.36 | 8.03 | 29.53 | 40.81 | 51.60 | 60.35 | 51.83 | a | 40.43 | 33.74 | 20.53 | 11.39 | 27.73 | |||||||||||
1975 | -0.90 | -3.14 | 8.03 | 28.33 | 42.26 | 52.07 | 59.00 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.11 | f | ||||||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.47 | n | 55.35 | 45.50 | 28.87 | 15.90 | -5.94 | 27.94 | g | |||||
1977 | -9.13 | 8.89 | a | 22.06 | 34.00 | 53.52 | 54.71 | w | 54.61 | 45.97 | 46.03 | 33.30 | a | 14.20 | -4.06 | 27.22 | a | |||||||||
1978 | -14.90 | -8.48 | a | 10.87 | 29.53 | 43.70 | a | 48.47 | 54.61 | 50.23 | 46.53 | 32.13 | 7.33 | -7.77 | 24.35 | |||||||||||
1979 | -20.23 | -15.68 | 4.52 | 20.30 | 36.16 | 49.80 | 58.06 | 48.45 | 43.93 | 29.81 | 17.80 | 8.55 | 23.46 | |||||||||||||
1980 | -8.13 | -2.86 | 6.68 | 32.73 | 44.55 | 49.10 | 54.97 | 49.45 | 40.77 | 31.19 | 23.10 | -1.03 | a | 26.71 | ||||||||||||
1981 | 0.00 | 8.33 | a | 21.39 | 29.93 | 38.65 | 49.87 | 55.48 | 55.19 | 41.37 | 33.13 | 26.57 | 1.48 | 30.12 | ||||||||||||
1982 | -20.90 | -2.19 | a | 12.55 | 26.57 | 43.26 | 45.07 | 55.57 | a | 50.26 | 41.23 | 34.13 | a | 14.97 | a | 9.19 | 25.81 | |||||||||
1983 | 5.17 | a | 8.29 | 17.84 | 28.90 | 34.30 | a | 49.03 | 57.97 | a | 57.35 | 43.47 | 32.10 | 22.90 | a | -11.26 | 28.84 | |||||||||
1984 | -2.77 | 14.24 | 10.26 | 32.37 | 37.03 | 51.90 | 53.81 | 54.74 | 38.67 | 32.87 | 15.03 | -5.03 | 27.76 | |||||||||||||
1985 | -7.23 | -7.21 | 21.42 | 31.40 | 41.71 | 44.63 | 52.00 | 49.53 | a | 39.73 | 29.32 | 1.80 | -9.40 | a | 23.98 | |||||||||||
1986 | 0.26 | -2.21 | 17.77 | 30.07 | 42.65 | 50.57 | 56.90 | 49.65 | 41.53 | 31.77 | 7.62 | a | 7.23 | 27.82 | ||||||||||||
1987 | 4.90 | 13.29 | 14.42 | 35.13 | 43.71 | 52.97 | a | 56.29 | 50.19 | 44.31 | a | 27.00 | a | 22.70 | 11.26 | 31.35 | ||||||||||
1988 | -7.94 | -4.04 | a | 16.39 | 26.33 | 43.35 | 56.93 | 56.68 | 55.58 | 43.60 | 27.58 | 16.40 | 1.48 | 27.70 | ||||||||||||
1989 | -6.16 | -12.14 | 4.23 | 26.72 | a | 43.03 | a | 50.33 | 59.39 | 54.45 | 41.87 | 28.94 | 10.27 | -8.42 | 24.38 | |||||||||||
1990 | 5.90 | a | -2.93 | 16.90 | 28.47 | 37.52 | 52.70 | 54.39 | 54.06 | 43.63 | 28.45 | 15.60 | -3.65 | 27.59 | ||||||||||||
1991 | -9.58 | 8.11 | 15.61 | 31.60 | 46.81 | 55.87 | 56.45 | 55.65 | 42.90 | 26.52 | 11.70 | 5.16 | 28.90 | |||||||||||||
1992 | 2.20 | a | 5.59 | 20.00 | 28.07 | 41.97 | 48.97 | 50.87 | 50.48 | 39.41 | a | 28.03 | 18.40 | -4.97 | 27.42 | |||||||||||
1993 | -9.81 | -2.14 | 15.28 | b | 29.11 | b | 40.13 | 49.70 | 54.42 | 54.43 | a | 39.60 | 27.53 | a | 14.50 | 3.68 | 26.37 | |||||||||
1994 | -16.86 | b | -11.89 | a | 21.11 | c | 27.70 | 40.77 | 53.50 | 54.29 | 50.94 | 46.10 | 37.84 | 18.71 | b | 4.87 | 27.26 | |||||||||
1995 | -4.13 | a | -0.81 | a | 14.06 | 24.67 | 39.23 | 56.50 | 55.77 | 54.03 | 42.17 | 32.87 | 7.07 | a | -2.84 | 26.55 | ||||||||||
1996 | -15.63 | a | -3.38 | 3.90 | 22.07 | a | 38.74 | 53.33 | 56.06 | 53.94 | 43.90 | 32.50 | a | 3.13 | -5.77 | 23.57 | ||||||||||
1997 | -12.39 | -3.32 | 4.68 | 22.72 | a | ----- | z | 54.07 | ----- | z | 52.68 | 45.33 | 31.32 | ----- | z | 16.77 | 23.54 | c | ||||||||
1998 | -2.94 | 16.25 | 13.17 | a | 33.13 | 42.84 | 49.77 | 54.97 | 53.94 | 45.13 | 33.35 | 18.63 | 3.74 | 30.17 | ||||||||||||
1999 | -9.52 | 7.86 | 18.52 | 30.63 | 43.61 | 49.73 | 54.97 | 50.84 | 41.87 | 28.58 | 21.80 | 8.40 | a | 28.94 | ||||||||||||
2000 | -6.77 | 7.55 | 21.45 | 25.07 | b | 39.10 | b | 47.67 | 55.19 | 52.31 | b | 41.13 | 31.10 | 15.50 | -13.57 | a | 26.31 | |||||||||
2001 | 0.32 | -10.64 | 12.97 | b | 30.30 | 43.77 | 50.60 | 55.00 | a | 53.32 | 41.21 | a | 30.23 | 24.70 | 7.00 | a | 28.23 | |||||||||
2002 | 2.40 | a | 8.07 | 3.65 | 25.47 | 33.42 | 53.70 | 57.90 | 53.48 | 45.43 | 24.00 | 15.77 | 10.03 | 27.78 | ||||||||||||
2003 | -2.19 | -9.21 | 7.19 | 29.41 | a | 42.71 | 52.50 | 57.10 | 56.71 | 44.60 | 34.19 | 11.47 | 9.16 | 27.80 | ||||||||||||
2004 | -12.35 | 1.72 | 13.55 | 29.77 | 36.16 | 48.97 | 54.48 | 47.87 | 47.57 | 33.13 | 23.07 | a | 1.52 | 27.12 | ||||||||||||
2005 | -12.13 | 0.57 | 9.19 | 34.97 | 40.68 | 55.03 | 56.68 | 52.45 | 45.67 | 34.61 | 21.67 | 10.58 | 29.16 | |||||||||||||
2006 | 13.13 | -5.89 | 12.90 | 36.33 | 43.00 | 53.87 | 57.55 | 53.00 | 44.07 | 30.87 | 16.47 | 8.35 | 30.30 | |||||||||||||
2007 | -2.29 | -7.46 | 15.00 | 28.77 | 42.97 | 53.77 | 58.29 | 51.00 | 43.03 | a | 35.71 | 18.87 | -5.80 | a | 27.65 | |||||||||||
2008 | -6.71 | -8.21 | 10.84 | 27.40 | 35.90 | 50.00 | 55.32 | 53.13 | 45.37 | 34.23 | 20.57 | -8.57 | a | 25.77 | ||||||||||||
2009 | -11.84 | -2.64 | 8.90 | 29.97 | 37.58 | 50.13 | 52.63 | a | 52.65 | 51.03 | 32.29 | 25.03 | -1.45 | 27.02 | ||||||||||||
2010 | -0.45 | -4.00 | 22.45 | 36.40 | 44.55 | 53.31 | a | 57.68 | 55.87 | 43.90 | 36.65 | 18.80 | 1.26 | 30.53 | ||||||||||||
2011 | -6.48 | -1.11 | 11.00 | 30.97 | 41.13 | 52.17 | 58.77 | a | 56.11 | c | 46.50 | 35.84 | 19.17 | 10.84 | 29.57 | |||||||||||
2012 | 6.42 | 7.00 | 24.26 | 31.53 | 42.81 | 53.03 | a | 60.87 | 52.74 | 40.93 | 33.32 | 15.47 | 0.94 | 30.78 | ||||||||||||
2013 | -4.00 | -2.04 | 2.16 | 17.90 | 40.74 | 54.53 | 57.03 | 54.71 | 47.37 | 32.84 | 14.73 | -10.03 | 25.50 | |||||||||||||
2014 | -12.52 | -10.36 | 3.80 | a | 24.00 | d | 41.13 | 53.47 | 54.74 | 55.65 | 44.79 | a | 35.31 | b | 10.13 | 6.33 | d | 25.54 | ||||||||
2015 | 1.67 | a | -10.39 | 18.13 | 29.53 | 40.62 | b | 53.70 | 59.52 | 53.45 | b | 49.37 | 35.13 | 24.40 | 11.41 | d | 30.54 | |||||||||
2016 | 0.30 | a | 9.62 | 22.73 | a | 26.79 | b | 43.56 | f | 53.50 | 57.81 | 55.03 | b | 48.07 | 35.06 | 31.55 | a | 2.48 | 31.18 | a | ||||||
2017 | 1.97 | a | 5.92 | b | 11.33 | a | 30.60 | 41.33 | a | 53.40 | 57.23 | 51.77 | 46.97 | 34.41 | b | 13.80 | 3.42 | 29.35 | ||||||||
2018 | 1.03 | -5.18 | 15.16 | 21.80 | 45.38 | b | 56.87 | 57.23 | 54.29 | 42.50 | 27.86 | b | 10.67 | 7.06 | 27.89 | |||||||||||
2019 | -6.81 | -14.14 | 8.45 | 29.57 | 35.48 | 51.17 | 57.45 | 52.52 | 47.60 | 31.84 | 16.38 | a | 3.10 | 26.05 | ||||||||||||
2020 | 0.63 | a | -0.75 | a | 15.33 | a | 24.60 | 39.97 | 54.33 | 59.52 | 54.61 | 43.07 | 27.90 | a | 16.28 | a | 10.48 | 28.83 | ||||||||
2021 | 6.97 | -7.68 | 17.32 | 25.27 | 37.48 | 55.50 | 58.87 | 53.71 | 48.72 | a | 39.43 | a | 21.00 | 3.43 | a | 30.00 | ||||||||||
2022 | -10.77 | -11.86 | 10.00 | a | 24.37 | 42.42 | 53.83 | 58.48 | 55.06 | 45.63 | 33.45 | 16.73 | -0.55 | 26.40 | ||||||||||||
2023 | 0.06 | -5.00 | -0.32 | 22.73 | 46.45 | b | 57.43 | b | 53.71 | 53.84 | 49.27 | 35.39 | 21.70 | 14.68 | 29.16 | |||||||||||
2024 | 2.84 | 15.07 | 12.68 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 10.20 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -5.75 | -1.93 | 12.51 | 28.57 | 40.95 | 51.51 | 56.26 | 53.30 | 43.85 | 32.68 | 17.12 | 1.88 | 27.59 | |||||||||||||
S.D. | 7.43 | 7.93 | 6.34 | 3.74 | 3.24 | 3.05 | 2.26 | 2.68 | 2.93 | 3.64 | 5.59 | 6.83 | 1.87 | |||||||||||||
SKEW | 0.01 | 0.30 | 0.02 | -0.21 | 0.40 | -0.17 | 0.03 | -0.96 | -0.05 | -0.23 | -0.35 | 0.03 | -0.12 | |||||||||||||
MAX | 13.13 | 18.00 | 27.93 | 37.03 | 53.52 | 57.83 | 61.33 | 57.65 | 51.03 | 43.26 | 31.55 | 16.77 | 31.35 | |||||||||||||
MIN | -20.90 | -23.54 | -0.32 | 17.90 | 33.42 | 44.63 | 50.87 | 44.45 | 36.69 | 19.77 | 1.80 | -13.57 | 23.46 | |||||||||||||
YRS | 86 | 87 | 85 | 83 | 85 | 86 | 85 | 88 | 88 | 88 | 86 | 87 | 75 |