YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1921 | 0.81 | 5.67 | a | 10.48 | 28.67 | 41.55 | 56.93 | 58.68 | 52.32 | 46.60 | 35.42 | 11.60 | 7.06 | 29.65 | ||||||||||||
1922 | -6.55 | -10.61 | 18.61 | 32.43 | 46.90 | 52.83 | 53.35 | 56.68 | 47.27 | 33.00 | 25.57 | -2.06 | 28.95 | |||||||||||||
1923 | -3.74 | -7.93 | 1.29 | 27.67 | 42.00 | 55.10 | 58.97 | 49.32 | 46.30 | 32.23 | 26.43 | 11.06 | 28.23 | |||||||||||||
1924 | -11.35 | 5.72 | 16.29 | 28.10 | 34.48 | 47.50 | 54.03 | 51.06 | 43.37 | 38.94 | 15.83 | -10.55 | 26.12 | |||||||||||||
1925 | -3.71 | 3.07 | 14.90 | 34.90 | 38.42 | 50.60 | 53.19 | 53.35 | 45.50 | 25.23 | 17.13 | 6.71 | 28.28 | |||||||||||||
1926 | 3.29 | 10.79 | 11.10 | 26.10 | 43.32 | 45.83 | 54.32 | 51.84 | 39.67 | 30.71 | 12.47 | -2.35 | 27.26 | |||||||||||||
1927 | -2.10 | 1.29 | 21.23 | 31.20 | 39.26 | 50.43 | 53.81 | 49.87 | 43.83 | 34.29 | 10.43 | -9.68 | 26.99 | |||||||||||||
1928 | 2.13 | 7.62 | 11.74 | 22.27 | 42.58 | 46.77 | 55.39 | 50.94 | 39.80 | 29.13 | 19.77 | 10.94 | 28.25 | |||||||||||||
1929 | -17.29 | -7.93 | 18.71 | 28.53 | 34.23 | 47.93 | 54.84 | 52.19 | 41.03 | 33.65 | 13.23 | -0.06 | 24.92 | |||||||||||||
1930 | -13.97 | 9.36 | 14.29 | 35.00 | 39.13 | 52.47 | 57.23 | 55.74 | 42.53 | 31.45 | 16.90 | 8.39 | 29.04 | |||||||||||||
1931 | 7.65 | 17.36 | 14.52 | 29.47 | 38.23 | 54.43 | 56.90 | 54.00 | 48.20 | 37.10 | 21.53 | 12.58 | 32.66 | |||||||||||||
1932 | -1.58 | -0.07 | 7.77 | 32.13 | 42.87 | 56.63 | 56.10 | 54.48 | 43.03 | 28.81 | 15.20 | 1.55 | 28.08 | |||||||||||||
1933 | 0.39 | -3.79 | 16.45 | 29.57 | 43.74 | 57.00 | 57.81 | 54.45 | 47.23 | 26.68 | 15.67 | -6.52 | 28.22 | |||||||||||||
1934 | 0.63 | a | 5.04 | 12.06 | 30.17 | 46.42 | 51.67 | 56.29 | 52.23 | 39.53 | 37.16 | 23.57 | 1.35 | 29.68 | ||||||||||||
1935 | -12.06 | 12.39 | 14.35 | 29.17 | 39.61 | 48.83 | 62.40 | a | 52.84 | 42.73 | 29.19 | 4.07 | -0.13 | 26.95 | ||||||||||||
1936 | -19.55 | -23.62 | 14.55 | 23.03 | 44.97 | 50.87 | 63.55 | 55.26 | 45.73 | 26.45 | 15.23 | 3.77 | 25.02 | |||||||||||||
1937 | -19.32 | -4.36 | 13.03 | 29.27 | 43.57 | a | 51.10 | 58.58 | 58.10 | 43.53 | 33.00 | 13.37 | -1.42 | 26.54 | ||||||||||||
1938 | -4.13 | -3.54 | 22.94 | 29.27 | 40.77 | 50.67 | 56.94 | 54.74 | 46.60 | 38.00 | 11.37 | 7.58 | 29.27 | |||||||||||||
1939 | 0.03 | -15.00 | 10.55 | 27.83 | 46.26 | 49.53 | 58.87 | 54.90 | 43.57 | 30.68 | 21.80 | 15.84 | 28.74 | |||||||||||||
1940 | -7.65 | 5.34 | 7.32 | 27.90 | 40.87 | 48.60 | 57.45 | 56.06 | 47.86 | a | 39.13 | 15.13 | 6.74 | 28.73 | ||||||||||||
1941 | -1.65 | -1.50 | 11.23 | 34.77 | 46.77 | 54.53 | 58.06 | 54.71 | 45.03 | 33.45 | 20.67 | 11.52 | 30.63 | |||||||||||||
1942 | 6.87 | 2.64 | 21.52 | 33.87 | 38.81 | 50.57 | 54.68 | 54.00 | 41.70 | 34.45 | 15.70 | -3.61 | 29.27 | |||||||||||||
1943 | -13.61 | 0.48 | a | 7.00 | 30.80 | 38.65 | 49.97 | 59.74 | 54.19 | 42.37 | 34.48 | 19.87 | 7.26 | 27.60 | ||||||||||||
1944 | 8.74 | -1.28 | 5.52 | 28.37 | 46.16 | 51.87 | 55.65 | 54.94 | 46.03 | 34.45 | 22.27 | 4.71 | 29.78 | |||||||||||||
1945 | 2.71 | 2.00 | a | 23.48 | 27.63 | 35.26 | 47.23 | 55.32 | 53.97 | 42.33 | 31.06 | 12.53 | -3.97 | 27.46 | ||||||||||||
1946 | -4.35 | -5.39 | 23.00 | 35.33 | 39.84 | 50.97 | 57.94 | 51.68 | 44.67 | 31.16 | 13.23 | 2.61 | 28.39 | |||||||||||||
1947 | 2.58 | -2.86 | 13.26 | 29.00 | 36.48 | 49.13 | 58.45 | 58.77 | 43.10 | 40.06 | 14.53 | 0.87 | 28.62 | |||||||||||||
1948 | -5.48 | -5.79 | 4.87 | 28.07 | 43.23 | 51.90 | 58.10 | 55.35 | 49.17 | 34.32 | 19.83 | -0.90 | 27.72 | |||||||||||||
1949 | -8.52 | -11.82 | 8.45 | 34.03 | 42.10 | 51.97 | 56.29 | 57.33 | a | 42.17 | 32.65 | 24.87 | -2.68 | 27.24 | ||||||||||||
1950 | -21.23 | -6.29 | 8.52 | 24.00 | 40.26 | 49.73 | 55.00 | 51.29 | 46.60 | 34.90 | 10.43 | -2.03 | 24.27 | |||||||||||||
1951 | -9.39 | -0.68 | 2.71 | 28.17 | 44.03 | 47.80 | 54.35 | 53.55 | 42.90 | 30.94 | 9.37 | -3.19 | 25.05 | |||||||||||||
1952 | -8.00 | 8.93 | 11.48 | 34.83 | 41.17 | a | 52.50 | 55.39 | 53.94 | 45.43 | 28.74 | 20.30 | 7.87 | 29.38 | ||||||||||||
1953 | -0.19 | 7.11 | 14.84 | 25.70 | 42.32 | 52.10 | 55.74 | 57.61 | 44.27 | 38.77 | 25.67 | 7.00 | 30.91 | |||||||||||||
1954 | -15.13 | 17.82 | 13.61 | 26.90 | 36.97 | 51.70 | 58.55 | 53.77 | 44.57 | 33.23 | 24.57 | 13.03 | 29.97 | |||||||||||||
1955 | -1.29 | -3.46 | 3.45 | 36.27 | 44.10 | 51.90 | 59.81 | 56.94 | 42.13 | 33.23 | 5.07 | -6.77 | 26.78 | |||||||||||||
1956 | -7.06 | -5.48 | 6.48 | 23.23 | 40.48 | 56.83 | 55.16 | 53.19 | 40.70 | 34.90 | 19.93 | 5.58 | 27.00 | |||||||||||||
1957 | -8.45 | -0.43 | 15.52 | 29.47 | 42.19 | 48.87 | 60.19 | 55.45 | 42.67 | 34.71 | 19.90 | 10.00 | 29.17 | |||||||||||||
1958 | 6.19 | -0.79 | 18.94 | 31.03 | 41.74 | 46.40 | 54.42 | 54.39 | 44.23 | 33.81 | 17.80 | -0.97 | 28.93 | |||||||||||||
1959 | -9.16 | -4.71 | 21.19 | 28.00 | 38.81 | 53.63 | 55.87 | 55.29 | 43.10 | 28.90 | 10.33 | 15.65 | 28.08 | |||||||||||||
1960 | -6.00 | -1.76 | 3.65 | 29.83 | 41.90 | 50.93 | 56.87 | 55.45 | 45.07 | 33.23 | 18.10 | -0.68 | 27.22 | |||||||||||||
1961 | -2.65 | 5.93 | 21.97 | 25.83 | 37.97 | 53.20 | 56.68 | 57.23 | 42.13 | 34.10 | 16.90 | -4.39 | 28.74 | |||||||||||||
1962 | -7.19 | -6.46 | 10.74 | 28.87 | 42.81 | 53.83 | 54.48 | 55.23 | 41.57 | 35.68 | 23.80 | 4.23 | 28.13 | |||||||||||||
1963 | -8.19 | -1.75 | 16.77 | 29.45 | a | 39.68 | 55.40 | ----- | z | 54.23 | 45.03 | 40.19 | 18.17 | -3.87 | 25.92 | a | ||||||||||
1964 | 1.26 | 4.07 | 3.90 | 31.53 | 42.19 | 49.87 | 58.00 | 50.65 | 40.23 | 33.81 | 18.53 | -7.06 | 27.25 | |||||||||||||
1965 | -11.13 | -3.04 | 5.58 | 31.57 | 40.58 | 51.10 | 55.65 | 52.39 | 37.33 | 35.48 | 15.73 | 10.35 | 26.80 | |||||||||||||
1966 | -17.13 | -5.29 | 20.00 | 26.97 | 39.26 | 52.63 | 60.23 | 53.65 | 44.30 | 32.74 | 11.70 | 0.84 | 26.66 | |||||||||||||
1967 | -1.90 | -8.93 | 14.10 | 26.77 | 36.97 | 49.97 | 53.77 | 50.97 | 46.10 | 33.10 | 19.90 | 5.23 | 27.17 | |||||||||||||
1968 | -4.35 | -0.90 | 21.26 | 29.87 | 38.81 | 51.00 | 54.52 | 52.42 | 45.63 | 33.23 | 22.07 | 0.42 | 28.66 | |||||||||||||
1969 | -12.03 | 3.82 | 5.13 | 33.27 | 42.29 | 46.17 | 56.84 | 57.77 | 46.57 | 31.29 | 21.30 | 7.90 | 28.36 | |||||||||||||
1970 | -7.35 | -1.46 | 5.45 | 29.93 | 40.55 | 56.93 | 58.06 | 54.84 | 45.10 | 33.26 | 18.40 | -3.03 | 27.56 | |||||||||||||
1971 | -12.03 | 1.39 | 12.71 | 30.50 | 40.87 | 54.77 | 54.23 | 55.35 | 45.40 | 36.10 | 18.60 | 0.84 | 28.23 | |||||||||||||
1972 | -9.26 | -5.62 | 13.35 | 29.53 | 46.65 | 53.53 | 53.71 | 56.71 | 42.80 | 29.87 | 17.63 | -4.68 | 27.02 | |||||||||||||
1973 | 4.87 | 6.54 | 27.65 | 28.97 | ----- | z | 53.20 | 55.32 | 58.39 | 44.21 | a | ----- | z | 14.20 | 0.87 | 29.42 | b | |||||||||
1974 | -9.97 | -2.89 | 8.19 | 30.03 | 41.13 | 53.33 | 61.45 | 52.58 | 41.20 | 34.19 | 19.86 | a | 11.23 | 28.36 | ||||||||||||
1975 | -0.94 | -1.21 | 8.80 | a | 27.50 | 44.39 | 53.57 | 62.19 | 54.77 | 43.47 | 36.52 | 24.70 | c | 3.23 | a | 29.75 | ||||||||||
1976 | -3.32 | 8.10 | 10.29 | 32.63 | 41.84 | 55.96 | c | 55.71 | 55.48 | b | 42.90 | a | 25.71 | 13.43 | b | 1.65 | 28.36 | |||||||||
1977 | -13.53 | a | 5.96 | a | 21.84 | 31.73 | 50.47 | a | 52.97 | a | 58.00 | 48.97 | ----- | z | ----- | z | ----- | z | ----- | z | 32.05 | d | ||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | 6.41 | d | 24.64 | b | 38.68 | 53.20 | 60.71 | 54.33 | d | ----- | z | 34.21 | c | 17.10 | 11.25 | c | 33.39 | c | ||||
1980 | -6.73 | e | 1.25 | a | 7.43 | c | 33.59 | a | 47.14 | b | 52.72 | a | 58.81 | 52.55 | 45.87 | ----- | z | 25.76 | a | 2.08 | e | 29.13 | a | |||
1981 | 2.11 | c | 11.57 | e | 23.29 | 31.93 | a | 42.42 | 50.53 | 57.26 | 57.58 | 45.73 | 35.47 | a | 27.57 | 2.89 | c | 32.36 | ||||||||
1982 | -19.00 | c | -0.96 | d | 13.69 | b | 27.45 | a | 45.32 | 47.79 | a | 58.81 | 54.87 | 44.20 | 36.47 | a | 15.89 | b | 11.97 | b | 28.04 | |||||
1983 | 6.92 | f | 12.96 | a | 19.57 | a | 27.73 | 37.13 | 52.30 | 61.39 | 60.45 | 44.93 | a | 34.74 | 22.28 | a | -10.17 | b | 33.03 | a | ||||||
1984 | -0.36 | c | 15.93 | a | 13.35 | 32.13 | 39.71 | 52.77 | 56.39 | 57.77 | a | 39.03 | 33.74 | 16.24 | a | -2.93 | c | 29.48 | ||||||||
1985 | -2.67 | d | -2.17 | d | 22.90 | 31.90 | 46.32 | 47.72 | a | 54.55 | 52.65 | 43.23 | 34.17 | a | 8.10 | a | -2.70 | d | 27.83 | |||||||
1986 | 8.58 | e | 1.65 | b | 23.06 | 31.57 | 44.87 | 53.83 | 58.19 | 53.81 | 46.43 | 35.53 | a | 11.81 | c | 10.62 | b | 31.66 | ||||||||
1987 | 11.55 | 18.07 | 17.79 | c | 37.07 | 47.55 | b | 56.67 | 59.94 | 54.10 | 47.43 | 30.31 | b | 25.20 | 14.10 | 34.98 | ||||||||||
1988 | -6.40 | f | -0.57 | a | 17.86 | c | 29.45 | a | 48.26 | 59.57 | 57.68 | 56.81 | 45.47 | 30.90 | 19.83 | a | 3.72 | f | 36.52 | b | ||||||
1989 | 0.15 | e | -8.88 | c | 9.03 | 31.17 | 45.39 | 51.86 | a | 61.48 | 57.13 | 46.27 | 32.69 | b | 15.92 | d | -5.33 | d | 28.07 | |||||||
1990 | 11.63 | d | 4.68 | c | 19.86 | c | 29.59 | a | 40.94 | 54.83 | 58.58 | 57.39 | 48.57 | 33.16 | 19.59 | a | 0.77 | 31.63 | ||||||||
1991 | -1.55 | 15.15 | a | 19.71 | 34.43 | 48.39 | 58.00 | 58.35 | 57.55 | 46.63 | 30.47 | a | 14.46 | b | 10.29 | 32.66 | ||||||||||
1992 | 7.97 | 13.14 | 23.81 | 30.79 | a | 45.90 | a | 51.60 | 52.71 | 52.77 | 42.42 | k | 27.61 | m | 21.22 | g | -2.39 | h | 34.84 | d | ||||||
1993 | -5.48 | j | -3.12 | k | 16.21 | l | 28.16 | k | 40.29 | j | 49.44 | l | 54.40 | k | 55.19 | j | 42.37 | k | 29.10 | j | 15.50 | l | 5.62 | j | ----- | z |
1994 | -16.00 | k | -9.55 | h | 21.00 | i | 28.44 | n | 42.19 | o | 54.91 | h | 54.77 | e | 52.94 | n | 47.94 | m | 38.40 | k | 21.71 | i | 8.52 | j | 54.77 | k |
1995 | -1.29 | j | 2.27 | f | 19.26 | l | 26.86 | p | 38.80 | p | 57.55 | j | 57.17 | m | 56.42 | l | 44.06 | n | 34.14 | i | 12.12 | m | 1.15 | k | ----- | z |
1996 | -11.83 | h | 3.88 | l | 7.00 | i | 24.63 | k | 41.67 | m | 55.00 | m | 57.56 | f | 57.86 | j | 47.91 | g | 33.46 | g | 6.38 | f | -5.05 | i | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.89 | b | ----- | z | 18.38 | a | 18.10 | a | 29.12 | i |
1998 | 0.30 | a | 20.11 | 14.81 | 36.13 | 46.84 | 52.07 | 59.71 | 60.23 | 50.30 | 36.94 | 20.87 | 7.90 | a | 33.85 | |||||||||||
1999 | -3.71 | 11.50 | 19.10 | 32.33 | 45.90 | a | 54.03 | 59.97 | 56.42 | 45.60 | 33.65 | 25.87 | 11.87 | 32.71 | ||||||||||||
2000 | 1.52 | 11.67 | b | 23.62 | b | 30.47 | 44.90 | b | 51.03 | 59.84 | 58.77 | e | 46.47 | 37.10 | a | 15.73 | -9.67 | a | 30.95 | |||||||
2001 | 4.86 | b | -4.39 | 15.74 | 32.40 | 45.94 | 53.53 | 60.29 | 59.71 | 47.93 | 33.19 | 27.63 | 9.43 | a | 32.19 | |||||||||||
2002 | 6.26 | 12.22 | a | 6.40 | a | 27.66 | a | 36.58 | 56.30 | 61.93 | a | 56.26 | 49.47 | 27.50 | a | 18.97 | 10.81 | 30.86 | ||||||||
2003 | -1.17 | b | -6.04 | 10.16 | 32.00 | 43.68 | 54.13 | 59.30 | a | 59.18 | c | 47.17 | a | 36.00 | a | 12.34 | a | 11.07 | a | 29.82 | ||||||
2004 | -8.93 | b | 5.07 | b | 16.03 | 29.93 | 39.65 | 50.40 | 57.65 | 49.91 | h | 50.23 | 35.35 | 24.07 | 7.17 | a | 27.87 | a | ||||||||
2005 | -5.45 | 6.00 | 15.26 | 35.63 | 42.65 | 57.23 | 59.13 | 55.94 | 49.13 | 36.81 | 22.87 | 11.55 | 32.23 | |||||||||||||
2006 | 17.74 | -0.36 | 17.37 | a | 36.73 | 46.53 | a | 56.00 | 61.13 | a | 57.68 | 46.77 | 31.19 | 17.17 | 12.23 | 33.35 | ||||||||||
2007 | 2.24 | b | ----- | z | 19.10 | 29.43 | 45.13 | 56.73 | 62.19 | 55.03 | a | 47.41 | a | 37.66 | b | 19.30 | 0.74 | 34.09 | a | |||||||
2008 | -4.55 | -4.69 | 13.52 | 27.77 | 38.65 | 51.17 | 57.52 | 57.87 | 47.90 | 36.90 | ----- | z | ----- | z | 32.20 | b | ||||||||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.26 | c | -0.56 | o | 18.26 | k |
2011 | -4.48 | f | -1.71 | 6.61 | 29.50 | 42.19 | 54.03 | 61.77 | 58.06 | 48.93 | 38.90 | 22.00 | 13.42 | 33.97 | a | |||||||||||
2012 | 7.65 | 8.68 | a | 27.19 | 33.50 | 44.58 | 55.03 | 64.29 | 56.61 | 46.37 | 33.23 | 19.28 | a | ----- | z | 36.04 | a | |||||||||
2013 | -0.52 | b | 3.21 | 7.75 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.35 | j | |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.80 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -3.55 | 1.63 | 14.06 | 30.16 | 42.15 | 52.25 | 57.59 | 54.93 | 44.81 | 33.54 | 17.94 | 3.67 | 28.86 | |||||||||||||
S.D. | 7.92 | 8.07 | 6.35 | 3.20 | 3.50 | 3.02 | 2.67 | 2.54 | 2.80 | 3.26 | 5.09 | 7.01 | 2.18 | |||||||||||||
SKEW | -0.02 | 0.04 | 0.03 | 0.01 | -0.05 | 0.00 | 0.30 | -0.08 | -0.18 | -0.35 | -0.27 | -0.08 | 0.59 | |||||||||||||
MAX | 17.74 | 20.11 | 27.65 | 37.07 | 50.47 | 59.57 | 64.29 | 60.45 | 50.89 | 40.19 | 27.63 | 18.10 | 34.98 | |||||||||||||
MIN | -21.23 | -23.62 | 1.29 | 22.27 | 34.23 | 45.83 | 52.71 | 48.97 | 37.33 | 25.23 | 4.07 | -10.55 | 24.27 | |||||||||||||
YRS | 81 | 83 | 84 | 84 | 83 | 84 | 84 | 83 | 82 | 80 | 83 | 80 | 71 |