YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.82 | n | 64.97 | a | 57.29 | b | 37.74 | d | 25.78 | c | 11.82 | 39.52 | g | |
1906 | 7.55 | 4.07 | a | 17.89 | d | 45.38 | 47.85 | 60.09 | b | 63.73 | 63.45 | 59.74 | a | 40.62 | b | ----- | z | ----- | z | 41.04 | b | |||||
1907 | ----- | z | ----- | z | ----- | z | ----- | z | 41.25 | a | 58.87 | 62.52 | d | 59.03 | b | 48.81 | a | 40.27 | c | ----- | z | 13.22 | d | 46.28 | e | |
1908 | 11.53 | a | ----- | z | ----- | z | ----- | z | 51.40 | j | 62.37 | d | ----- | z | 59.33 | a | 58.67 | a | 42.48 | f | 27.39 | b | ----- | z | 43.86 | g |
1909 | 2.25 | i | 2.75 | h | 14.97 | m | ----- | z | 41.42 | s | 60.50 | 65.25 | e | ----- | z | 56.46 | f | 42.52 | f | ----- | z | 5.22 | a | 43.66 | i | |
1910 | 8.73 | 2.29 | 39.55 | 43.87 | 46.40 | e | 65.47 | 64.34 | c | 60.57 | a | 52.34 | a | 45.53 | ----- | z | 6.30 | h | 42.91 | b | ||||||
1911 | -7.48 | 1.81 | a | 23.42 | 37.90 | 50.77 | 62.54 | g | 59.83 | b | 59.57 | a | 51.00 | d | 38.10 | g | 12.22 | e | 9.92 | a | 29.90 | b | ||||
1912 | -14.44 | 3.62 | 9.91 | b | 38.77 | b | 49.45 | b | 58.73 | h | ----- | z | 58.68 | 49.22 | a | 38.84 | f | 27.35 | j | 10.10 | j | 27.89 | e | |||
1913 | ----- | z | 0.39 | 9.18 | 43.88 | a | 47.10 | 61.66 | b | 61.47 | 63.79 | b | 53.14 | i | 34.69 | 31.41 | c | 17.97 | 37.15 | b | ||||||
1914 | 6.11 | -8.98 | 19.47 | 33.78 | a | 52.39 | 58.40 | a | 68.89 | 61.47 | 57.93 | 48.69 | 19.20 | h | -0.10 | a | 36.19 | a | ||||||||
1915 | -0.90 | a | 12.86 | 21.27 | 44.34 | a | 48.98 | a | 51.50 | 58.19 | 61.53 | a | 53.23 | b | 41.42 | 23.47 | a | 10.53 | l | 37.81 | a | |||||
1916 | -14.15 | a | -3.81 | m | 16.86 | f | 33.00 | c | 49.22 | a | 56.45 | a | 70.55 | 64.58 | 52.35 | 35.87 | 26.18 | 3.48 | h | 41.56 | c | |||||
1917 | -7.95 | b | -7.52 | 17.70 | d | 32.48 | a | 50.13 | 57.88 | a | 64.16 | l | 62.37 | a | ----- | z | ----- | z | ----- | z | -0.55 | b | 25.57 | d | ||
1918 | -7.48 | b | 4.59 | a | 33.60 | a | 39.00 | 48.18 | a | 62.29 | b | 61.85 | 62.08 | 49.75 | n | 44.75 | a | 25.95 | 12.40 | a | 35.20 | a | ||||
1919 | 11.45 | a | 3.55 | f | 6.81 | o | 38.40 | 55.22 | b | 64.03 | 68.47 | 64.44 | e | 54.10 | a | 31.72 | a | 12.30 | 1.68 | 40.18 | b | |||||
1920 | -4.77 | a | 6.14 | a | 15.62 | a | 30.20 | 52.77 | 60.92 | 66.74 | 69.06 | 60.33 | 48.33 | a | 31.50 | t | 10.50 | d | 37.81 | a | ||||||
1921 | 8.58 | 12.20 | a | 19.48 | c | 26.79 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.42 | i | |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | -11.64 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -11.64 | k |
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 | 67.35 | 66.86 | c | 66.81 | b | 54.18 | e | 33.26 | d | 18.41 | h | 4.28 | d | 48.79 | f | |
1933 | 3.84 | 4.50 | i | 22.35 | 38.95 | a | 55.17 | a | 69.17 | 70.68 | 70.48 | 60.33 | a | 36.84 | 21.30 | -0.05 | c | 40.82 | a | |||||||
1934 | 7.79 | 10.11 | 21.45 | 40.38 | 61.13 | 61.50 | c | 69.71 | 65.00 | 50.65 | 46.23 | 30.62 | 9.04 | c | 39.47 | |||||||||||
1935 | -5.33 | b | 17.94 | a | 20.32 | 36.19 | c | 49.68 | 59.52 | a | 72.32 | a | 63.86 | c | 53.41 | a | 43.02 | a | 13.03 | 7.50 | 35.95 | |||||
1936 | -11.48 | d | -15.64 | 19.84 | 32.22 | 61.53 | a | 63.20 | 78.24 | 69.85 | 59.75 | 39.12 | a | 23.10 | 9.59 | b | 35.78 | |||||||||
1937 | -13.47 | a | 0.75 | 18.52 | 36.80 | 54.40 | 60.98 | a | 68.35 | 69.58 | a | 54.26 | a | 40.07 | a | 21.13 | 5.13 | 34.71 | ||||||||
1938 | 0.73 | a | 2.84 | 29.83 | a | 38.25 | 49.69 | 60.59 | a | 66.72 | a | 66.66 | 58.91 | b | 47.95 | a | 18.39 | c | 11.47 | b | 37.67 | |||||
1939 | 4.84 | f | -7.67 | a | 16.58 | 37.73 | 56.05 | 56.69 | a | 70.52 | f | 67.79 | b | 56.72 | 36.88 | b | ----- | z | 26.66 | b | 38.60 | c | ||||
1940 | 0.02 | c | 11.08 | d | 15.24 | 35.47 | a | 52.53 | 60.00 | f | 70.36 | b | 67.00 | f | 62.34 | b | ----- | z | 19.63 | 11.18 | 30.87 | c | ||||
1941 | 4.97 | a | 6.06 | b | 16.94 | 39.41 | a | 55.74 | 62.17 | 67.91 | b | 63.97 | 52.07 | 40.10 | 22.92 | 15.60 | 37.32 | |||||||||
1942 | 12.83 | a | 6.85 | a | 24.02 | b | 39.52 | 46.19 | 57.65 | 62.62 | a | 62.60 | 51.30 | 45.66 | 21.52 | b | 5.04 | d | 36.32 | |||||||
1943 | -7.93 | a | 9.38 | c | 12.34 | c | 39.18 | 46.68 | a | 57.40 | 67.10 | a | 63.18 | 52.62 | 46.44 | 25.93 | 18.86 | c | 35.93 | |||||||
1944 | 17.03 | a | 5.57 | g | 14.43 | c | 39.25 | 56.63 | 59.97 | 64.90 | b | 62.90 | a | 54.78 | a | 46.32 | 26.58 | 11.93 | d | 41.34 | a | |||||
1945 | 5.12 | b | 9.52 | b | 30.07 | c | 34.50 | 45.20 | a | 55.92 | 65.13 | 63.85 | a | 52.66 | b | 41.40 | 17.45 | b | 8.42 | m | 38.26 | a | ||||
1946 | 2.75 | a | 0.71 | n | 30.41 | b | 44.70 | 49.70 | a | 59.55 | a | 67.08 | 62.47 | b | 55.59 | a | 37.26 | b | 23.00 | d | 12.18 | k | 43.25 | b | ||
1947 | 8.52 | d | 2.12 | c | 15.61 | d | 35.10 | d | 45.50 | b | 57.66 | a | 68.45 | 70.23 | a | 50.93 | h | 48.38 | a | 21.69 | d | 7.36 | b | 34.60 | a | |
1948 | 3.02 | b | 3.04 | e | 13.71 | e | 35.23 | b | 52.66 | c | 59.22 | a | 66.84 | 65.82 | c | 62.81 | a | ----- | z | 25.87 | 3.62 | g | 38.82 | b | ||
1949 | -1.89 | ----- | z | ----- | z | ----- | z | 53.90 | 62.35 | 67.79 | 69.50 | a | 54.24 | g | 41.52 | 31.72 | 2.67 | h | 46.41 | e | ||||||
1950 | -16.27 | c | 2.23 | 13.52 | h | 29.84 | a | 46.85 | 59.52 | 63.97 | a | 61.03 | a | 56.33 | 43.58 | 18.21 | b | 3.24 | 33.50 | a | ||||||
1951 | -2.47 | 5.86 | 10.66 | 36.63 | 55.17 | b | 57.78 | a | 65.57 | a | 60.72 | b | 49.83 | 37.62 | a | 17.58 | 2.58 | 33.13 | ||||||||
1952 | -1.05 | a | 15.23 | a | 17.82 | 47.60 | a | 52.27 | 61.86 | a | 65.70 | a | 64.16 | 57.42 | 40.05 | a | 27.45 | 14.45 | 38.58 | |||||||
1953 | 6.00 | a | 10.13 | b | 22.57 | b | 33.65 | 50.85 | 60.55 | a | 65.02 | a | 66.94 | 53.35 | 50.08 | a | 33.22 | c | 13.72 | b | 38.84 | |||||
1954 | -7.45 | 22.59 | e | 20.30 | a | 34.82 | 46.13 | 59.95 | a | 66.72 | b | 62.25 | c | 51.73 | 41.65 | a | 31.80 | 19.00 | b | 37.46 | ||||||
1955 | ----- | z | 2.69 | b | 9.55 | b | 45.59 | c | 54.13 | 61.83 | d | 68.58 | 67.60 | 52.73 | 43.30 | a | 12.50 | a | 0.10 | 38.05 | a | |||||
1956 | 0.69 | -3.50 | l | 13.03 | 27.63 | d | 50.47 | a | 65.57 | c | 63.15 | 63.84 | 50.65 | c | 45.97 | 27.88 | f | 10.66 | 39.17 | b | ||||||
1957 | -2.27 | 7.57 | 22.71 | 38.65 | 53.93 | d | 57.74 | a | 69.37 | 63.19 | 51.11 | b | 42.29 | 25.58 | 15.33 | a | 37.10 | |||||||||
1958 | 13.29 | 3.10 | b | 25.77 | 41.63 | 53.55 | 56.41 | c | 63.40 | a | 62.31 | b | 53.54 | d | 44.31 | 22.74 | a | 3.85 | 36.99 | |||||||
1959 | -4.56 | 2.40 | c | 25.19 | 38.90 | a | 49.73 | c | 63.48 | a | 66.42 | 65.76 | b | 53.57 | b | 33.81 | d | 15.27 | b | 19.03 | 35.75 | |||||
1960 | 0.95 | 6.53 | 11.00 | 36.50 | 52.12 | e | 60.70 | b | 68.42 | 65.90 | 56.50 | c | 42.90 | a | 23.88 | 7.58 | 36.08 | |||||||||
1961 | 2.63 | 12.17 | a | 24.87 | 34.47 | 50.09 | b | 64.95 | 65.87 | 68.98 | b | 52.30 | e | 43.65 | 25.20 | 1.97 | a | 37.26 | ||||||||
1962 | -0.55 | -0.34 | 16.06 | 35.62 | 50.40 | a | 64.54 | r | 63.31 | 64.53 | 52.35 | 44.84 | 31.12 | m | 11.05 | b | 33.73 | b | ||||||||
1963 | -2.61 | 5.61 | 25.94 | 38.90 | 49.71 | 63.93 | 67.79 | ----- | z | 58.28 | 53.26 | 27.88 | 1.64 | b | 35.48 | a | ||||||||||
1964 | 8.26 | 13.83 | 12.06 | 39.72 | a | 53.64 | b | 58.55 | 67.00 | 61.14 | b | 51.52 | 43.71 | 23.67 | -2.26 | 35.90 | ||||||||||
1965 | -3.98 | 4.54 | 11.73 | 37.30 | 51.35 | a | 61.77 | 63.89 | 62.98 | 44.93 | 45.16 | 19.35 | 13.44 | 34.37 | ||||||||||||
1966 | -14.32 | 0.91 | 22.80 | p | 33.78 | 47.89 | 63.11 | b | 69.50 | 63.21 | 56.35 | 42.32 | 15.82 | 7.37 | a | 35.08 | a | |||||||||
1967 | 2.65 | a | -1.32 | 17.32 | a | 32.95 | 47.16 | 60.80 | 66.27 | 63.75 | a | 59.75 | 41.29 | 25.25 | 11.98 | 35.65 | ||||||||||
1968 | 1.27 | 7.10 | 28.82 | 40.35 | 49.93 | a | 60.28 | 64.48 | 60.68 | 55.72 | a | 42.55 | a | 26.53 | 5.03 | 36.90 | ||||||||||
1969 | -6.35 | a | 6.98 | 12.74 | 42.21 | d | 53.55 | 53.03 | 64.08 | 68.84 | 55.12 | a | 36.11 | 25.47 | 12.50 | 35.36 | ||||||||||
1970 | -4.07 | a | 4.11 | 9.23 | 33.43 | 48.23 | 66.03 | 68.48 | 64.90 | 54.93 | 43.40 | 22.70 | 3.31 | 34.56 | ||||||||||||
1971 | -6.45 | 10.48 | 18.27 | a | 35.77 | b | 52.55 | 64.05 | a | 61.98 | 66.68 | 54.97 | 42.81 | 22.27 | 3.90 | 35.61 | ||||||||||
1972 | -4.91 | b | -0.53 | 19.24 | 36.33 | 57.15 | 63.28 | 61.18 | 66.35 | 51.18 | 37.89 | 19.95 | -0.48 | 33.89 | ||||||||||||
1973 | 9.60 | 10.96 | 32.98 | 37.68 | 51.69 | 63.96 | e | 67.16 | o | 68.10 | 53.50 | 47.45 | 18.46 | e | 1.89 | c | 36.03 | a | ||||||||
1974 | -6.76 | 1.45 | 10.60 | 33.35 | 46.74 | 62.10 | 68.61 | 59.03 | 48.27 | 42.53 | 23.67 | a | 15.87 | 33.79 | ||||||||||||
1975 | 10.90 | u | ----- | z | 12.50 | b | 32.47 | 51.82 | a | 60.32 | 68.10 | 60.53 | 51.52 | 44.32 | 27.32 | 8.18 | 41.71 | b | ||||||||
1976 | 1.65 | a | 12.17 | b | 12.98 | 42.90 | 54.55 | 65.15 | 66.29 | 65.65 | g | 57.50 | a | 35.68 | a | 21.53 | 1.35 | 33.80 | a | |||||||
1977 | -4.88 | b | 12.80 | a | 28.56 | 45.73 | 64.03 | 61.82 | 66.39 | 57.80 | d | 53.90 | 45.47 | 23.30 | 3.75 | g | 41.36 | a | ||||||||
1978 | -6.96 | g | ----- | z | ----- | z | ----- | z | 64.25 | w | 61.13 | g | 64.84 | 64.12 | b | 56.59 | c | 44.31 | d | 2.15 | q | 1.45 | a | 46.26 | g | |
1979 | -9.47 | -6.67 | a | 14.08 | e | 26.42 | e | 45.31 | b | 61.22 | a | 67.35 | a | 61.68 | 55.63 | 40.48 | d | 23.74 | a | 16.63 | a | 33.03 | ||||
1980 | 0.45 | 5.70 | a | 13.59 | d | 46.19 | a | 58.58 | a | 62.37 | 66.48 | 60.07 | h | 53.17 | a | 39.17 | e | 29.38 | a | 7.65 | h | 37.51 | b | |||
1981 | 10.23 | 8.90 | h | 31.18 | 43.18 | b | 51.29 | 59.35 | d | 66.35 | a | 66.42 | f | ----- | z | 39.62 | s | 39.17 | o | 8.70 | u | 43.59 | f | |||
1982 | -16.29 | q | 4.77 | m | 19.20 | p | 37.95 | b | 52.90 | 56.18 | h | 64.57 | p | 63.21 | n | 53.00 | o | 44.06 | n | 23.68 | j | 15.80 | i | 45.42 | j | |
1983 | 13.31 | b | 16.36 | 23.55 | 36.38 | 47.56 | 60.47 | a | 69.57 | a | 71.66 | 54.26 | a | 41.17 | b | 27.09 | a | -6.50 | c | 37.91 | ||||||
1984 | 7.26 | 23.09 | b | 20.20 | a | 42.28 | 48.93 | c | 62.03 | 65.97 | 71.00 | b | 49.63 | 42.80 | a | 24.07 | 3.19 | e | 38.37 | |||||||
1985 | 0.48 | b | 6.04 | c | 26.87 | 44.75 | l | 56.98 | b | 56.12 | 65.66 | 58.10 | a | 51.63 | 45.00 | b | ----- | z | ----- | z | 40.77 | c | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.13 | 5.67 | 19.50 | 37.75 | 51.37 | 60.82 | 66.33 | 64.24 | 54.31 | 42.15 | 23.14 | 8.12 | 36.20 | |||||||||||||
S.D. | 8.02 | 7.32 | 7.08 | 4.62 | 4.23 | 3.21 | 3.16 | 3.46 | 3.58 | 4.36 | 5.03 | 6.66 | 1.69 | |||||||||||||
SKEW | -0.01 | -0.19 | 0.59 | 0.01 | 0.53 | -0.19 | 0.44 | 0.26 | 0.21 | -0.17 | -0.35 | 0.29 | -0.07 | |||||||||||||
MAX | 17.03 | 23.09 | 39.55 | 47.60 | 64.03 | 69.17 | 78.24 | 71.66 | 62.81 | 53.26 | 33.22 | 26.66 | 39.47 | |||||||||||||
MIN | -16.27 | -15.64 | 9.18 | 26.42 | 41.25 | 51.50 | 58.19 | 57.80 | 44.93 | 31.72 | 12.22 | -6.50 | 33.03 | |||||||||||||
YRS | 62 | 55 | 59 | 62 | 65 | 63 | 63 | 63 | 62 | 61 | 54 | 55 | 29 |