YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.62 | i | 31.32 | 17.40 | ----- | z | 24.36 | j | ||
1920 | ----- | z | ----- | z | 13.66 | b | 20.48 | e | 38.52 | d | 49.62 | a | 53.11 | l | 48.92 | e | 45.90 | 39.65 | n | ----- | z | ----- | z | 36.18 | f | |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | 40.40 | a | 50.92 | d | 59.69 | b | 49.90 | a | 46.86 | a | 32.90 | ----- | z | 9.08 | e | 41.39 | e | |
1922 | -5.78 | d | -9.36 | 14.54 | c | 28.73 | 47.84 | 50.14 | b | 49.11 | d | 51.77 | 41.45 | a | ----- | z | 30.66 | a | 2.38 | b | 27.41 | a | ||||
1923 | 0.83 | b | ----- | z | 2.67 | a | 26.32 | b | 38.19 | 52.15 | c | 56.00 | b | 44.75 | c | 45.88 | e | 31.46 | e | 23.62 | d | 10.62 | g | 32.19 | b | |
1924 | -14.12 | f | 4.97 | 12.84 | 27.50 | 32.52 | b | 44.53 | 49.58 | 48.77 | 39.93 | a | 36.55 | 17.83 | -8.10 | a | 27.90 | a | ||||||||
1925 | -5.50 | c | 3.12 | c | 15.32 | 31.07 | b | 34.31 | b | 50.28 | a | 52.53 | a | 53.71 | 45.00 | a | 25.10 | 16.31 | d | -0.55 | 26.72 | |||||
1926 | -3.77 | 1.42 | d | 6.64 | c | 24.23 | 40.34 | b | 42.41 | a | 50.35 | 51.38 | b | 44.39 | b | 32.43 | a | 17.50 | -0.03 | a | 25.61 | |||||
1927 | -6.10 | 4.69 | b | 21.24 | b | 30.14 | b | 38.72 | b | 47.77 | 51.06 | 44.03 | 48.69 | a | 31.94 | 19.47 | -8.07 | c | 26.97 | |||||||
1928 | 0.23 | a | 3.21 | 11.47 | a | 23.66 | a | 38.70 | a | 43.73 | 54.52 | 52.74 | 41.60 | 33.03 | 23.69 | a | 8.03 | b | 27.88 | |||||||
1929 | -17.19 | -10.12 | c | 17.97 | 29.90 | a | 36.06 | 46.13 | 53.68 | 51.32 | 41.77 | 31.35 | 15.97 | a | 4.65 | 25.12 | ||||||||||
1930 | -9.38 | b | 10.33 | a | 15.45 | 29.14 | b | 40.73 | a | 50.59 | c | 53.19 | 51.48 | b | 39.58 | d | 35.13 | 21.83 | 8.97 | 28.92 | ||||||
1931 | 11.65 | 14.59 | a | 18.39 | 27.56 | c | 38.50 | a | 54.17 | 55.79 | b | 50.77 | 46.97 | 38.48 | 25.65 | d | 19.13 | 33.47 | ||||||||
1932 | 8.70 | a | 1.38 | 6.53 | a | 27.37 | 40.19 | 51.07 | 55.00 | 51.94 | 38.73 | 30.13 | 16.34 | a | -1.34 | b | 27.17 | |||||||||
1933 | 7.00 | a | -8.57 | 16.65 | 26.37 | 41.77 | 55.97 | 57.55 | 48.87 | a | 47.50 | 29.26 | 18.14 | b | -1.71 | 28.23 | ||||||||||
1934 | 7.61 | -0.64 | 10.07 | a | 29.43 | 44.29 | 51.27 | 53.45 | 47.77 | 41.13 | 35.87 | a | 24.70 | -6.72 | b | 28.19 | ||||||||||
1935 | -7.67 | a | 12.19 | a | 15.61 | 26.79 | a | 36.27 | a | ----- | z | 62.17 | b | 55.33 | a | 42.03 | 31.57 | a | 16.46 | f | 6.80 | a | 28.11 | b | ||
1936 | -8.35 | -16.45 | 15.87 | a | 23.57 | 42.74 | 47.24 | a | 57.08 | g | 53.50 | a | 46.31 | a | 28.13 | 15.21 | a | 4.90 | 22.97 | a | ||||||
1937 | -12.65 | -0.43 | 9.13 | 29.93 | a | 41.68 | 48.37 | 54.41 | b | 57.48 | 43.10 | a | 29.83 | a | 19.67 | 0.61 | 26.76 | |||||||||
1938 | -2.77 | a | 6.19 | b | 21.03 | 29.17 | 38.84 | 49.20 | 55.71 | 55.68 | 43.19 | c | 36.55 | 19.57 | b | 5.55 | 29.83 | |||||||||
1939 | 2.84 | -11.00 | 10.55 | 24.24 | a | 43.06 | 52.63 | 55.83 | b | 53.39 | 43.97 | a | 34.35 | 19.97 | a | 15.52 | 28.78 | |||||||||
1940 | -5.08 | f | 4.93 | a | 7.65 | 25.29 | b | 37.58 | 47.97 | 55.00 | 54.65 | 48.67 | 38.00 | b | 16.89 | b | 9.74 | 31.49 | a | |||||||
1941 | 2.87 | 1.25 | 11.07 | a | 37.07 | a | 46.65 | 52.80 | 58.97 | 52.90 | a | 49.10 | a | 35.50 | a | ----- | z | ----- | z | 34.82 | b | |||||
1942 | ----- | z | 6.79 | i | 23.42 | e | 34.11 | c | 37.92 | f | 51.97 | a | 54.65 | 54.35 | 43.80 | 30.97 | 17.13 | 0.06 | 34.50 | c | ||||||
1943 | -8.11 | c | -0.12 | c | 5.17 | b | 27.10 | 39.87 | a | 53.67 | 58.26 | 54.20 | a | 39.57 | 30.16 | 16.41 | a | 5.90 | b | 26.84 | ||||||
1944 | 9.74 | 0.27 | c | 12.24 | b | 25.57 | 45.28 | b | 51.00 | b | 54.97 | b | 56.55 | 46.43 | 30.58 | 29.03 | a | 4.23 | 30.49 | |||||||
1945 | -4.23 | a | -1.61 | 20.55 | 28.67 | 34.66 | b | 47.03 | 55.45 | b | 55.00 | 45.20 | 28.64 | c | 21.07 | b | 0.83 | a | 27.60 | |||||||
1946 | 2.13 | a | -3.23 | b | 26.80 | a | 32.13 | 37.29 | 51.03 | 56.33 | a | 50.85 | d | 45.13 | 36.93 | a | 18.10 | 5.52 | d | 29.92 | ||||||
1947 | 2.67 | a | 2.48 | a | 14.74 | 27.61 | b | 37.27 | a | 49.70 | 54.90 | 60.13 | a | 47.24 | a | 44.52 | 17.39 | b | 4.97 | a | 30.30 | |||||
1948 | -14.64 | f | -2.15 | b | 10.55 | b | 34.53 | 38.90 | b | 49.57 | b | 58.00 | 54.06 | 45.86 | a | 31.94 | 24.48 | a | 3.23 | 31.73 | a | |||||
1949 | 1.26 | d | -1.61 | 14.97 | 29.76 | a | 44.29 | 55.21 | b | 59.87 | a | 56.32 | 43.34 | a | 36.93 | a | 25.10 | 6.30 | a | 30.98 | ||||||
1950 | -11.63 | a | -2.58 | b | 7.77 | 25.00 | 39.87 | a | 51.93 | ----- | z | 47.74 | 43.03 | a | 36.13 | 16.26 | c | -5.54 | c | 22.54 | a | |||||
1951 | -7.48 | 2.62 | d | 9.42 | 28.90 | 42.81 | 45.33 | 52.26 | 50.87 | 41.83 | 34.39 | 10.59 | a | 3.23 | 26.23 | |||||||||||
1952 | -5.74 | 5.75 | a | 9.71 | 28.56 | c | 35.58 | 52.27 | 56.50 | a | 49.73 | a | 42.69 | a | 22.35 | 17.53 | 12.73 | a | 27.31 | |||||||
1953 | -2.18 | c | -4.14 | 16.13 | a | 26.23 | 36.23 | 52.90 | 51.42 | 53.87 | 42.97 | 34.71 | 19.86 | a | 5.42 | 27.78 | ||||||||||
1954 | -9.52 | 11.50 | 11.26 | 28.03 | 33.84 | 52.03 | a | 54.32 | 48.55 | 44.30 | 31.55 | 22.41 | a | 8.42 | 28.06 | |||||||||||
1955 | -6.13 | -6.89 | 5.03 | 33.40 | 41.42 | 49.57 | 60.48 | 55.19 | 42.93 | 32.87 | 12.87 | -6.45 | 26.19 | |||||||||||||
1956 | -3.84 | -7.41 | 8.06 | 25.10 | 36.94 | 50.47 | 49.26 | 50.03 | 38.03 | 36.65 | 19.13 | 4.23 | 25.55 | |||||||||||||
1957 | -10.77 | -0.89 | 8.35 | 26.13 | 36.58 | 47.21 | a | 56.94 | 51.87 | 40.67 | 29.87 | a | 23.03 | 8.68 | 26.47 | |||||||||||
1958 | 5.97 | -5.07 | 15.06 | 26.77 | 34.81 | 41.97 | 50.81 | 48.13 | 45.52 | a | 33.27 | a | 22.60 | -1.13 | 26.56 | |||||||||||
1959 | -7.10 | -0.39 | 17.65 | 29.27 | 44.32 | 53.77 | 55.39 | 59.00 | 47.50 | 34.00 | 12.00 | 16.97 | 30.20 | |||||||||||||
1960 | 3.45 | 2.62 | 4.97 | 31.83 | 41.29 | 47.73 | 54.03 | 57.39 | 47.77 | 34.32 | 24.50 | 4.32 | 29.52 | |||||||||||||
1961 | -1.39 | 9.57 | 23.81 | 26.77 | 37.48 | 49.03 | 54.10 | 55.06 | 46.67 | 35.16 | 22.10 | 6.13 | 30.37 | |||||||||||||
1962 | -3.77 | 2.64 | 19.32 | 27.67 | 47.06 | 49.77 | 52.74 | 52.52 | 43.37 | 37.55 | 26.97 | 7.94 | 30.31 | |||||||||||||
1963 | -7.77 | a | -2.39 | 19.42 | 32.03 | 41.19 | 52.37 | 56.94 | 51.84 | 47.67 | 42.65 | 26.23 | -0.39 | 29.98 | ||||||||||||
1964 | 7.48 | 4.66 | 12.42 | 31.47 | 44.42 | 50.47 | 56.68 | 51.00 | 45.43 | 35.13 | 23.57 | -0.94 | 30.15 | |||||||||||||
1965 | -6.48 | -4.54 | 6.39 | 30.30 | 44.29 | 48.40 | 52.57 | a | 52.13 | 41.87 | 35.58 | 21.70 | 15.35 | 28.13 | ||||||||||||
1966 | -12.23 | 0.14 | 20.94 | 28.73 | 35.10 | a | 51.00 | 58.71 | 52.19 | 43.30 | 32.65 | 18.87 | 5.90 | 27.94 | ||||||||||||
1967 | 2.29 | -5.43 | 16.29 | 31.00 | 34.74 | 50.43 | 53.61 | 49.61 | 42.37 | 32.58 | 19.23 | 6.61 | 27.78 | |||||||||||||
1968 | -1.03 | -2.93 | 22.23 | 33.07 | 39.39 | 49.75 | b | 55.65 | 54.26 | 46.50 | 38.84 | 22.72 | a | 5.16 | 30.30 | |||||||||||
1969 | -1.52 | 5.46 | 11.03 | 32.37 | 42.77 | 44.48 | a | 54.61 | 55.03 | 46.67 | 33.77 | 20.72 | a | 11.55 | 29.75 | |||||||||||
1970 | -5.84 | -0.25 | 9.71 | 29.00 | a | 41.84 | 52.69 | a | 57.52 | 53.87 | 45.83 | 36.52 | 21.63 | 6.10 | 29.05 | |||||||||||
1971 | -7.35 | 3.04 | 13.45 | 29.03 | a | 37.29 | 54.20 | 51.67 | a | 49.58 | 46.80 | 41.00 | 23.10 | 7.00 | 29.07 | |||||||||||
1972 | -9.48 | -4.97 | 11.81 | 26.73 | 44.87 | 48.52 | a | 54.74 | 54.71 | 43.20 | 32.32 | 25.17 | 1.35 | 27.41 | ||||||||||||
1973 | 1.39 | 5.07 | 27.97 | 30.62 | a | 39.48 | 51.70 | 56.03 | 58.52 | 46.10 | 40.52 | 24.23 | 5.32 | 32.25 | ||||||||||||
1974 | -1.71 | 1.93 | 17.42 | 31.03 | 40.10 | 47.40 | 58.61 | 51.77 | 39.03 | 34.77 | 25.37 | 12.81 | 29.88 | |||||||||||||
1975 | 1.45 | 5.57 | 9.45 | 26.00 | 43.53 | a | 51.07 | 58.94 | 54.13 | 42.70 | 36.19 | 21.31 | a | 4.97 | 29.61 | |||||||||||
1976 | -5.39 | 12.03 | 14.87 | 31.59 | a | 38.55 | 52.03 | 55.10 | 53.39 | 41.33 | 27.19 | 11.97 | -6.19 | 27.21 | ||||||||||||
1977 | -12.03 | 6.48 | a | 24.55 | 34.47 | 47.87 | 51.43 | 58.06 | 49.17 | a | 47.77 | 33.68 | 21.07 | 5.68 | 30.68 | |||||||||||
1978 | -6.55 | -4.11 | 14.29 | 29.47 | 42.87 | 49.21 | a | 55.97 | 54.55 | 49.83 | 35.26 | 17.67 | -0.61 | 28.15 | ||||||||||||
1979 | -11.81 | -3.25 | 17.97 | 27.10 | 37.74 | 48.77 | 55.39 | 53.23 | 46.86 | a | 32.52 | 22.27 | 13.26 | 28.34 | ||||||||||||
1980 | 0.81 | ----- | z | 10.48 | 31.57 | 42.35 | 49.37 | 55.90 | 56.03 | 45.10 | 31.39 | 22.93 | 5.68 | 31.96 | a | |||||||||||
1981 | 2.00 | 10.32 | 20.87 | 32.37 | 38.81 | 51.30 | 56.84 | 56.29 | 43.97 | a | 34.19 | 26.27 | 7.74 | 31.75 | ||||||||||||
1982 | -13.35 | 0.89 | a | 14.00 | 28.30 | 44.90 | 45.03 | 57.71 | 52.81 | 46.43 | 38.06 | 19.43 | b | 13.84 | 29.00 | |||||||||||
1983 | 6.13 | 17.54 | 22.94 | 27.83 | 36.35 | 51.63 | 60.74 | 59.65 | 49.10 | 36.53 | a | 26.30 | -7.90 | 32.24 | ||||||||||||
1984 | -0.35 | 17.03 | 12.84 | 32.20 | 40.19 | 54.17 | 56.32 | 58.26 | 42.87 | 40.00 | a | 21.90 | 6.97 | 31.87 | ||||||||||||
1985 | -1.38 | b | 2.00 | 23.16 | 34.17 | 44.94 | 47.57 | 54.42 | 52.19 | 46.50 | 33.77 | 15.00 | -5.68 | 28.89 | ||||||||||||
1986 | 4.48 | 2.93 | 20.74 | 35.53 | 44.60 | a | 51.67 | 59.19 | 51.74 | 47.17 | a | 34.97 | a | 17.31 | a | 10.77 | 31.76 | |||||||||
1987 | 5.93 | a | 13.93 | 22.71 | 30.79 | b | 43.03 | 51.70 | 59.61 | 54.27 | a | 44.52 | a | 28.58 | 25.93 | 14.53 | a | 32.96 | ||||||||
1988 | -6.18 | c | -5.07 | a | 19.68 | 29.43 | 45.58 | 52.73 | 59.45 | 58.35 | 47.73 | 29.41 | b | 24.86 | a | 4.77 | 30.06 | |||||||||
1989 | 4.03 | -7.29 | 11.31 | b | 29.37 | 41.61 | 50.67 | 58.97 | 56.45 | 46.23 | 34.40 | a | 17.87 | -4.48 | 28.26 | |||||||||||
1990 | 11.65 | 4.67 | a | 21.16 | 33.27 | 39.00 | 54.20 | 55.87 | 55.68 | 48.17 | 32.55 | 24.40 | 5.13 | 32.14 | ||||||||||||
1991 | -2.63 | a | 7.86 | 20.42 | 34.23 | 49.06 | 56.07 | 57.65 | 57.07 | a | 46.27 | d | 33.48 | 17.33 | c | 9.15 | e | 32.16 | ||||||||
1992 | 8.90 | 15.93 | 21.06 | 31.33 | 45.23 | 49.70 | 51.81 | 52.61 | c | 46.00 | 33.13 | 25.27 | 14.73 | e | 32.97 | |||||||||||
1993 | -0.35 | 6.39 | 16.74 | 30.20 | 43.35 | 50.87 | 58.87 | 57.06 | 39.96 | b | 32.10 | 20.10 | 11.61 | 30.58 | ||||||||||||
1994 | -12.00 | -1.68 | 22.42 | 30.50 | 43.00 | 54.13 | 56.19 | 53.45 | 51.17 | 41.23 | 26.40 | 10.73 | a | 31.30 | ||||||||||||
1995 | 4.03 | 2.70 | a | 21.06 | 27.47 | 41.10 | 55.87 | 58.06 | 60.61 | 45.07 | 37.29 | 16.07 | 4.19 | 31.13 | ||||||||||||
1996 | -10.03 | 1.59 | 11.20 | a | 27.50 | 40.03 | 53.53 | 55.68 | 55.74 | d | 49.27 | 36.00 | 16.17 | 4.19 | 28.41 | |||||||||||
1997 | -2.26 | 7.93 | 18.55 | 29.77 | 38.19 | 52.89 | c | 57.68 | 53.48 | 49.77 | 37.84 | 20.77 | 18.29 | 31.91 | ||||||||||||
1998 | 9.52 | 22.82 | 22.68 | 34.53 | 46.39 | 52.40 | 57.29 | 57.61 | 50.23 | 40.23 | 27.38 | a | 10.65 | 35.98 | ||||||||||||
1999 | -0.87 | 13.93 | 21.61 | 33.53 | 46.81 | 53.97 | 60.84 | 56.65 | 51.21 | p | 34.00 | 28.27 | 12.20 | a | 32.81 | a | ||||||||||
2000 | 0.65 | 12.00 | a | 25.29 | 29.60 | 44.87 | 49.60 | 57.23 | 57.17 | a | 44.34 | a | 38.13 | 25.13 | -4.16 | 31.65 | ||||||||||
2001 | 7.93 | a | -3.18 | 15.45 | 34.57 | 45.94 | 54.47 | 58.29 | 58.23 | 45.83 | 35.03 | 32.87 | 17.32 | 33.56 | ||||||||||||
2002 | 10.81 | 15.48 | a | 10.32 | 30.87 | 38.48 | 54.97 | 60.94 | 56.87 | 46.81 | n | 31.81 | 21.83 | 15.35 | 31.61 | a | ||||||||||
2003 | 1.35 | 0.30 | r | 26.89 | v | 32.04 | g | 40.81 | 50.90 | 56.52 | 58.06 | 47.50 | 35.32 | 22.33 | 12.39 | 36.13 | c | |||||||||
2004 | -2.71 | 7.69 | 22.35 | 30.30 | 41.65 | 48.24 | a | 55.35 | 50.90 | 53.17 | 38.10 | 26.00 | 8.42 | 31.62 | ||||||||||||
2005 | -0.13 | 12.39 | 14.97 | 34.37 | 42.77 | 57.33 | 59.65 | 54.97 | 51.23 | 36.93 | a | 24.53 | 11.48 | 33.38 | ||||||||||||
2006 | 18.16 | 4.11 | 22.68 | 36.47 | 46.13 | 52.03 | 60.61 | 57.58 | 44.83 | 31.65 | 25.40 | 17.90 | 34.80 | |||||||||||||
2007 | 7.68 | -1.89 | a | 23.00 | 29.23 | 47.35 | 54.27 | 57.65 | 55.40 | a | 48.47 | 40.68 | 24.34 | a | 4.10 | 32.52 | ||||||||||
2008 | -0.39 | -0.07 | 13.39 | 29.72 | a | 37.71 | 50.57 | 55.73 | a | 53.52 | 48.03 | a | 35.63 | a | 23.14 | a | -1.41 | b | 28.80 | |||||||
2009 | -13.17 | a | 6.54 | 17.48 | 31.53 | 40.23 | 50.30 | 51.32 | 53.07 | a | 50.27 | 33.07 | a | 29.43 | 6.50 | a | 29.71 | |||||||||
2010 | -1.77 | a | 4.59 | a | 25.31 | b | 35.14 | a | 43.61 | 52.90 | ----- | z | 58.45 | 43.80 | 34.19 | 26.40 | e | 6.96 | c | 29.96 | a | |||||
2011 | 3.61 | 9.76 | c | 15.62 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 6.69 | j | |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -1.52 | 2.69 | 15.68 | 29.67 | 40.93 | 50.68 | 55.95 | 53.64 | 45.19 | 34.26 | 21.45 | 5.68 | 29.59 | |||||||||||||
S.D. | 7.08 | 7.25 | 5.86 | 3.22 | 3.77 | 3.04 | 2.90 | 3.36 | 3.11 | 3.74 | 4.42 | 6.59 | 2.32 | |||||||||||||
SKEW | 0.19 | 0.23 | -0.05 | -0.03 | 0.01 | -0.55 | -0.29 | -0.31 | -0.08 | -0.09 | -0.08 | -0.17 | 0.32 | |||||||||||||
MAX | 18.16 | 22.82 | 27.97 | 37.07 | 49.06 | 57.33 | 62.17 | 60.61 | 53.17 | 44.52 | 32.87 | 19.13 | 35.98 | |||||||||||||
MIN | -17.19 | -16.45 | 2.67 | 20.48 | 32.52 | 41.97 | 49.11 | 44.03 | 38.03 | 22.35 | 10.59 | -8.10 | 25.12 | |||||||||||||
YRS | 86 | 86 | 89 | 89 | 90 | 90 | 87 | 91 | 89 | 90 | 88 | 88 | 74 |