YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9.61 | 9.61 | k | |
1916 | -13.32 | -11.24 | d | 8.15 | e | 21.82 | b | 37.14 | c | 44.00 | c | 57.20 | a | 49.43 | a | 39.40 | 30.50 | c | 16.48 | a | -5.90 | a | 22.81 | |||
1917 | -14.57 | a | -15.42 | b | 8.52 | 24.73 | 29.16 | 41.29 | b | 54.42 | 46.45 | 43.10 | 15.04 | f | 24.10 | -9.00 | 21.16 | a | ||||||||
1918 | -14.90 | a | ----- | z | 18.63 | a | ----- | z | 39.10 | 52.15 | d | 54.83 | a | 46.61 | 35.37 | 33.35 | 24.41 | a | 13.19 | 30.28 | b | |||||
1919 | 4.71 | -1.86 | 10.29 | 29.37 | 37.13 | 54.67 | 56.53 | a | ----- | z | ----- | z | 26.00 | ----- | z | ----- | z | 27.10 | d | |||||||
1920 | ----- | z | ----- | z | 23.39 | m | 22.47 | 40.74 | 54.23 | 51.03 | b | 47.74 | 46.97 | 38.81 | 17.60 | 9.81 | 36.60 | c | ||||||||
1921 | 2.39 | 5.79 | 13.45 | 30.63 | 40.32 | 53.43 | 57.65 | 47.29 | 44.73 | 33.43 | a | 12.77 | ----- | z | 31.08 | a | ||||||||||
1922 | -5.37 | a | -5.78 | a | 13.52 | 29.73 | 47.55 | 51.20 | 54.57 | a | 51.43 | a | 41.57 | 33.13 | 27.40 | -1.06 | 28.16 | |||||||||
1923 | -3.87 | -12.21 | -2.90 | b | 26.07 | a | 37.48 | 52.33 | 55.23 | a | 43.26 | 42.23 | 29.84 | 24.43 | 12.57 | a | 25.37 | |||||||||
1924 | -12.97 | 2.72 | 13.58 | 28.80 | 31.58 | 42.60 | 50.33 | a | 49.03 | 38.73 | 37.52 | 16.55 | a | -9.17 | b | 24.11 | ||||||||||
1925 | -4.66 | b | 3.54 | 14.68 | 30.43 | 33.77 | 49.97 | 51.23 | 53.03 | 44.60 | 25.10 | 17.50 | 1.35 | 26.71 | ||||||||||||
1926 | -0.06 | 3.39 | 6.87 | 23.33 | 39.61 | 45.07 | 52.37 | a | 52.10 | 40.60 | 31.77 | 13.33 | -0.55 | 25.65 | ||||||||||||
1927 | -2.80 | a | 2.96 | 16.97 | 29.90 | 38.19 | 45.00 | 49.94 | 44.77 | 48.13 | 33.00 | 14.27 | -8.52 | 25.98 | ||||||||||||
1928 | -3.68 | 2.34 | 8.58 | 24.43 | 37.26 | 42.40 | 49.55 | 43.79 | c | 37.03 | 29.19 | 20.50 | 6.58 | 24.83 | ||||||||||||
1929 | -17.74 | -8.54 | 16.52 | 25.97 | 33.61 | 43.40 | 49.74 | 47.87 | 39.33 | 30.68 | 13.47 | 0.74 | 22.92 | |||||||||||||
1930 | -14.90 | 2.85 | b | 14.39 | 27.03 | 37.32 | 51.30 | 51.35 | 43.87 | 38.70 | 29.97 | 18.97 | a | 6.60 | a | 25.62 | ||||||||||
1931 | 4.23 | a | 13.18 | 14.55 | 25.67 | 33.61 | 47.03 | a | 51.35 | 47.65 | 44.60 | 35.74 | 22.97 | a | 13.71 | 29.52 | ||||||||||
1932 | 3.58 | -3.00 | 3.48 | 24.73 | 39.16 | 48.87 | 51.45 | 49.76 | b | 39.10 | 28.83 | a | 12.00 | a | -2.29 | 24.64 | ||||||||||
1933 | -0.83 | a | -9.21 | 10.52 | 25.30 | 38.35 | 54.40 | 54.58 | 47.55 | 45.45 | a | 28.03 | 14.21 | a | -5.37 | a | 25.25 | |||||||||
1934 | 2.73 | a | -7.29 | 5.87 | 28.63 | 41.29 | 48.90 | a | 49.68 | 43.71 | 39.30 | 34.03 | 24.57 | -6.34 | b | 25.42 | ||||||||||
1935 | -12.32 | 5.96 | 15.13 | a | 24.73 | 34.55 | 45.43 | 57.58 | 53.87 | 38.97 | 32.65 | 10.63 | 5.61 | c | 26.07 | |||||||||||
1936 | -11.55 | -17.83 | 15.35 | 21.66 | a | 41.90 | a | 43.43 | 53.71 | 50.42 | 43.80 | 26.74 | 13.37 | 3.77 | 23.73 | |||||||||||
1937 | -15.68 | -4.00 | a | 6.87 | a | 27.17 | a | 40.19 | 46.53 | 58.43 | a | 69.79 | b | 49.89 | l | 27.52 | 18.24 | a | -0.97 | 24.92 | a | |||||
1938 | -3.97 | 3.82 | 20.00 | 27.50 | 39.42 | 48.47 | 52.58 | 53.30 | a | 43.37 | 36.33 | a | 16.45 | a | 0.42 | 28.14 | ||||||||||
1939 | -1.42 | -12.04 | 4.81 | 24.90 | 39.32 | 50.67 | 52.13 | 50.87 | 42.03 | a | 31.94 | 20.63 | 14.07 | a | 26.49 | |||||||||||
1940 | -8.87 | 3.31 | 4.58 | 25.13 | 36.45 | 44.62 | a | 50.61 | 51.29 | 43.57 | 34.81 | 13.83 | 3.60 | a | 25.24 | |||||||||||
1941 | -2.26 | -1.29 | 9.52 | 34.93 | 42.19 | 49.33 | 53.74 | 49.81 | 46.70 | 33.32 | 21.86 | a | 9.06 | 28.91 | ||||||||||||
1942 | 2.53 | a | -2.25 | 17.97 | 30.97 | 34.90 | 47.10 | 48.60 | a | 50.55 | 39.77 | 28.13 | 15.30 | -2.48 | 25.92 | |||||||||||
1943 | -10.68 | -4.79 | 0.58 | 24.10 | 35.65 | 47.83 | a | 53.74 | 51.26 | 38.43 | 29.87 | 13.63 | 2.35 | 23.50 | ||||||||||||
1944 | 9.29 | -2.50 | a | 10.74 | 22.87 | 41.42 | 48.77 | 53.23 | 54.52 | 44.67 | 31.71 | 28.97 | 4.81 | 29.04 | ||||||||||||
1945 | -1.65 | -1.18 | 20.87 | 26.60 | 31.58 | 43.20 | 52.00 | 51.81 | 43.43 | 28.47 | a | 18.97 | -1.03 | 26.09 | ||||||||||||
1946 | -2.16 | -6.18 | 21.97 | 29.70 | 36.06 | 47.27 | 52.94 | 48.03 | 41.47 | 32.65 | 16.47 | 2.13 | 26.69 | |||||||||||||
1947 | 0.03 | -6.54 | 8.23 | 25.40 | 34.61 | 45.20 | 53.03 | 56.65 | 41.57 | 39.84 | 12.60 | 1.03 | 25.97 | |||||||||||||
1948 | -10.65 | -8.48 | 7.06 | 30.40 | 35.32 | 46.63 | 52.90 | 49.29 | 41.70 | 30.00 | 21.28 | a | 0.94 | 24.70 | ||||||||||||
1949 | -1.93 | a | -7.46 | 8.77 | a | 28.53 | 37.32 | 51.77 | 55.71 | 53.97 | 40.07 | 34.35 | 21.90 | 0.81 | 26.98 | |||||||||||
1950 | -12.13 | -0.57 | 6.60 | a | 21.73 | 36.29 | 47.70 | 48.03 | 45.71 | 42.92 | f | ----- | z | 10.96 | b | -7.28 | b | 19.71 | b | |||||||
1951 | -12.74 | h | 6.14 | g | 8.83 | h | 27.17 | a | 40.19 | j | 45.54 | b | 50.55 | 48.78 | h | 39.67 | 31.84 | 10.93 | a | -1.11 | d | 29.23 | e | |||
1952 | -7.29 | c | 7.71 | a | 8.36 | f | 28.58 | d | 35.45 | 50.43 | b | 52.31 | b | 48.36 | c | 42.39 | b | 26.82 | i | ----- | z | ----- | z | 32.24 | d | |
1953 | -4.08 | f | -0.33 | g | 15.93 | b | 25.17 | a | 36.69 | b | 50.37 | 53.70 | a | 55.23 | 44.17 | 36.32 | 22.57 | 2.94 | 34.31 | b | ||||||
1954 | -9.13 | 11.18 | 7.00 | 25.83 | 34.77 | 50.13 | 51.84 | 49.32 | 44.67 | 31.90 | 23.83 | 10.10 | 27.62 | |||||||||||||
1955 | -3.58 | -5.82 | -0.10 | 34.43 | 41.77 | 50.23 | 58.87 | 58.72 | b | 42.77 | 33.03 | b | 10.53 | -6.10 | a | 26.23 | ||||||||||
1956 | -1.90 | -7.83 | 6.10 | 23.97 | 35.48 | 50.00 | 47.87 | 49.35 | n | 39.45 | a | 37.55 | 20.80 | 1.19 | 22.97 | a | ||||||||||
1957 | -12.69 | b | -2.96 | b | 4.90 | a | 28.20 | 37.03 | a | 47.07 | 55.94 | 51.16 | 40.30 | 31.90 | 21.87 | 5.90 | 25.72 | |||||||||
1958 | 4.58 | -3.32 | 16.52 | 27.53 | 35.39 | c | 41.33 | 51.39 | 49.77 | 45.70 | 34.03 | 19.34 | a | -7.94 | 26.19 | |||||||||||
1959 | -13.42 | -7.21 | 12.50 | a | 25.73 | 41.23 | a | 48.50 | 53.73 | a | 55.26 | 44.60 | 32.39 | 8.97 | 12.97 | 26.27 | ||||||||||
1960 | -1.45 | -0.86 | 3.23 | a | 28.27 | 37.70 | a | 46.13 | 52.13 | a | 55.50 | c | 44.70 | 33.45 | 22.93 | 1.23 | 26.91 | |||||||||
1961 | -6.00 | 8.79 | 21.58 | 25.10 | 35.39 | 47.30 | 53.26 | 52.58 | 44.43 | 35.61 | 20.70 | 3.48 | b | 28.52 | ||||||||||||
1962 | -8.26 | -1.61 | 17.87 | 25.52 | a | 41.23 | 46.38 | a | 50.00 | 50.42 | 41.37 | 35.06 | 25.37 | 3.55 | 27.24 | |||||||||||
1963 | -9.77 | -4.74 | a | 15.97 | a | 28.00 | 37.87 | 50.03 | 55.10 | 49.00 | 44.90 | 40.87 | 25.23 | -3.14 | b | 27.44 | ||||||||||
1964 | 5.00 | 1.31 | 8.10 | 28.13 | 43.42 | 47.45 | a | 54.29 | 48.16 | 42.80 | 31.26 | 21.93 | -3.52 | 27.36 | ||||||||||||
1965 | -11.19 | -10.07 | 2.68 | 29.30 | 42.07 | a | 46.10 | 51.68 | 48.83 | b | 38.87 | 35.33 | a | 19.18 | b | 13.66 | b | 25.53 | ||||||||
1966 | -14.61 | -2.56 | a | 18.77 | 27.47 | 34.94 | 49.43 | 55.55 | 50.35 | 41.67 | 30.87 | 16.29 | b | 0.84 | 25.75 | |||||||||||
1967 | -1.39 | -11.79 | 13.87 | 26.37 | 32.77 | 48.50 | 50.84 | 46.90 | 40.23 | 30.93 | b | 17.17 | 7.61 | 25.17 | ||||||||||||
1968 | -2.35 | -2.97 | 20.23 | 28.60 | 37.81 | 47.23 | 53.19 | 50.06 | 43.48 | a | 36.90 | 21.97 | a | 2.90 | 28.09 | |||||||||||
1969 | -5.03 | 2.00 | 7.42 | 29.86 | a | 39.10 | 42.43 | 51.52 | 53.32 | 44.60 | 31.35 | 20.13 | 9.47 | a | 27.18 | |||||||||||
1970 | -7.16 | -2.32 | 4.13 | a | 27.33 | 38.61 | 50.57 | 54.87 | 52.00 | 44.23 | 36.48 | b | 19.33 | 0.26 | 26.53 | |||||||||||
1971 | -11.45 | 1.32 | 4.40 | f | 26.37 | 34.48 | 50.63 | 49.74 | 48.45 | 43.73 | 37.87 | 20.23 | 2.29 | 27.61 | a | |||||||||||
1972 | -12.77 | -6.69 | 8.29 | 24.80 | 43.23 | 45.47 | 52.23 | 51.43 | a | 40.66 | a | 30.73 | a | 21.13 | -0.94 | 24.80 | ||||||||||
1973 | 0.55 | 2.43 | 25.61 | 29.10 | 37.48 | ----- | z | ----- | z | 57.28 | f | 40.69 | a | 37.48 | 19.47 | 1.94 | 21.64 | c | ||||||||
1974 | -5.58 | -6.61 | 13.48 | 27.43 | 35.84 | 45.47 | 57.26 | 50.45 | 38.03 | 33.55 | 23.97 | ----- | z | 28.48 | a | |||||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | 39.16 | 49.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.13 | j | ||
1976 | ----- | z | ----- | z | ----- | z | ----- | z | 33.47 | a | 47.83 | a | 50.57 | a | 48.88 | f | 39.10 | a | 23.45 | 10.10 | a | -9.10 | 27.92 | e | ||
1977 | -13.84 | 5.11 | a | 21.42 | 31.37 | 44.71 | 47.33 | 52.45 | 45.26 | 42.67 | 32.32 | 18.10 | 2.83 | a | 27.48 | |||||||||||
1978 | -9.11 | c | -5.39 | 10.68 | 27.45 | a | 39.97 | 46.34 | a | 52.10 | 51.29 | 46.86 | b | 32.81 | 15.00 | a | ----- | z | 28.00 | a | ||||||
1979 | -14.65 | -7.93 | a | 14.13 | 24.87 | 35.10 | a | 44.41 | h | 51.93 | b | 47.90 | 43.48 | a | 30.68 | 18.23 | 10.90 | 23.15 | a | |||||||
1980 | -2.42 | 0.48 | 7.68 | 30.62 | a | 40.00 | a | 47.34 | a | 53.26 | 51.94 | 40.97 | 29.29 | 20.53 | -0.03 | a | 26.64 | |||||||||
1981 | -1.00 | ----- | z | 19.19 | 29.93 | o | 34.41 | b | 48.10 | 51.13 | a | 51.32 | 40.32 | b | 30.55 | b | 25.90 | 5.19 | 30.51 | b | ||||||
1982 | -17.94 | 0.04 | a | 11.61 | 18.33 | o | 42.33 | a | 40.97 | 52.77 | 48.11 | c | 44.20 | 36.50 | c | 14.04 | b | 11.77 | 25.86 | a | ||||||
1983 | 3.32 | 11.33 | a | 22.29 | q | 25.07 | 32.94 | 46.57 | 54.74 | 52.52 | 44.47 | 33.33 | d | 23.15 | d | -10.50 | a | 28.81 | a | |||||||
1984 | -3.93 | a | 14.83 | 7.23 | 30.37 | ----- | z | 49.27 | 48.97 | 51.86 | b | 38.38 | f | 36.50 | e | 16.32 | e | 3.42 | 25.48 | b | ||||||
1985 | -3.97 | a | -2.81 | a | 21.63 | d | 31.44 | c | 40.00 | l | 41.33 | c | 45.65 | 45.06 | 38.57 | 25.53 | a | 4.41 | a | -13.74 | 21.19 | a | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -5.75 | -2.01 | 11.62 | 27.15 | 37.63 | 47.60 | 52.70 | 50.27 | 42.11 | 32.50 | 18.36 | 1.86 | 26.20 | |||||||||||||
S.D. | 6.59 | 6.78 | 6.29 | 2.84 | 3.44 | 3.28 | 2.64 | 4.11 | 2.71 | 3.61 | 5.01 | 6.68 | 1.53 | |||||||||||||
SKEW | 0.03 | 0.25 | 0.04 | 0.30 | 0.24 | -0.04 | 0.14 | 1.62 | -0.08 | -0.08 | -0.30 | -0.06 | -0.05 | |||||||||||||
MAX | 9.29 | 14.83 | 25.61 | 34.93 | 47.55 | 54.67 | 58.87 | 69.79 | 48.13 | 40.87 | 28.97 | 14.07 | 29.52 | |||||||||||||
MIN | -17.94 | -17.83 | -2.90 | 21.66 | 29.16 | 40.97 | 45.65 | 43.26 | 35.37 | 23.45 | 4.41 | -13.74 | 22.81 | |||||||||||||
YRS | 65 | 63 | 63 | 65 | 67 | 68 | 68 | 64 | 65 | 66 | 67 | 65 | 47 |