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 | 17.48 | 17.48 | k | |
1916 | 0.82 | 4.06 | d | 23.98 | h | 36.89 | b | 49.12 | f | 56.00 | c | 70.69 | b | 63.62 | b | 52.38 | 40.21 | c | 27.59 | a | 6.60 | b | 35.89 | b | ||
1917 | 1.29 | c | -1.10 | c | 22.13 | 34.97 | a | 46.74 | b | 56.50 | g | 67.19 | 60.81 | b | 54.78 | a | ----- | z | 33.55 | 3.64 | b | 32.40 | b | |||
1918 | -2.12 | b | ----- | z | 32.15 | a | ----- | z | 52.32 | a | 62.71 | d | 67.43 | a | 63.13 | 48.16 | b | ----- | z | 31.86 | b | 20.11 | 41.75 | c | ||
1919 | 15.28 | a | 9.82 | c | 20.35 | a | 40.77 | 51.18 | 63.25 | 67.35 | a | ----- | z | ----- | z | 36.58 | a | ----- | z | ----- | z | 38.07 | d | |||
1920 | ----- | z | ----- | z | ----- | z | 32.58 | 54.02 | a | 64.48 | b | 63.59 | d | 61.97 | 58.83 | 50.39 | 26.35 | 16.69 | 47.66 | c | ||||||
1921 | 13.76 | 16.95 | 25.00 | 43.22 | 53.47 | 66.66 | b | 71.63 | 62.55 | 56.40 | 44.88 | a | 21.00 | a | ----- | z | 43.23 | a | ||||||||
1922 | 7.98 | c | 6.56 | a | 24.34 | 39.65 | 59.76 | 62.62 | a | 65.72 | b | 64.86 | c | 56.55 | 45.39 | 32.60 | 8.25 | a | 39.52 | |||||||
1923 | 8.89 | 1.91 | 10.67 | b | 37.61 | b | 52.55 | 66.12 | 68.50 | a | 57.65 | 55.65 | 42.52 | 34.15 | 22.55 | a | 38.23 | |||||||||
1924 | -1.53 | 14.67 | 24.29 | 37.98 | 44.32 | 56.47 | 63.84 | b | 61.03 | 50.68 | 49.79 | 25.19 | a | 0.72 | b | 35.62 | ||||||||||
1925 | 5.96 | c | 12.59 | 25.92 | 42.67 | 47.85 | 61.38 | 63.67 | a | 66.03 | a | 54.42 | 31.58 | 26.32 | 10.00 | 37.37 | ||||||||||
1926 | 9.97 | 13.84 | 17.42 | 36.63 | 53.26 | 56.10 | 64.95 | a | 62.50 | 48.53 | 39.18 | 19.92 | 8.13 | 35.87 | ||||||||||||
1927 | 6.35 | a | 13.02 | 26.21 | 39.25 | 46.44 | 57.83 | 62.48 | 58.44 | 58.15 | 44.58 | 22.05 | 2.00 | 36.40 | ||||||||||||
1928 | 7.39 | 12.84 | 22.19 | 35.16 | a | 52.73 | a | 55.22 | 64.11 | 60.82 | f | 48.75 | 39.42 | a | 28.78 | a | 17.55 | b | 34.92 | a | ||||||
1929 | -1.83 | a | 2.71 | 25.31 | 36.25 | 43.98 | 55.78 | a | 63.40 | 61.61 | 52.10 | a | 41.95 | a | 24.55 | 12.13 | 34.83 | |||||||||
1930 | -1.27 | 17.33 | b | 28.47 | 44.77 | 52.44 | 64.37 | 66.55 | 64.77 | 54.29 | a | 40.85 | 29.76 | a | 17.43 | a | 39.98 | |||||||||
1931 | 17.13 | a | 24.98 | 26.35 | 42.03 | 49.48 | 62.50 | a | 67.31 | 61.23 | 58.27 | 48.90 | 34.98 | a | 23.89 | 43.09 | ||||||||||
1932 | 14.19 | 12.39 | a | 15.31 | 38.27 | 52.91 | b | 63.53 | a | 65.97 | 64.62 | b | 53.33 | 40.77 | a | 24.43 | a | 9.48 | 37.93 | |||||||
1933 | 13.07 | a | 4.52 | 21.45 | 37.12 | a | 51.74 | 68.38 | 68.23 | a | 61.97 | 58.98 | b | 39.26 | 23.02 | b | 6.62 | a | 37.86 | |||||||
1934 | 14.88 | b | 6.79 | 19.48 | a | 38.50 | 56.58 | 62.36 | a | 64.53 | 59.88 | a | 52.78 | 46.68 | 33.63 | 7.70 | d | 38.65 | ||||||||
1935 | 1.61 | 18.68 | 25.03 | a | 37.32 | 50.47 | 59.17 | 69.29 | 63.60 | 50.98 | 42.39 | 19.98 | 15.07 | c | 37.80 | |||||||||||
1936 | -0.32 | -5.03 | 23.83 | a | 32.12 | a | 54.87 | a | 57.20 | 69.23 | a | 62.95 | a | 56.68 | 36.70 | d | 22.33 | 14.60 | 35.43 | |||||||
1937 | 0.09 | b | 8.98 | a | 20.45 | a | 36.21 | a | 53.55 | 60.35 | 70.02 | f | 75.66 | b | 60.03 | l | 39.45 | 26.60 | a | 11.00 | u | 35.70 | c | |||
1938 | 9.06 | d | 17.98 | 33.76 | 41.40 | 52.31 | 62.17 | 65.71 | 66.97 | a | 56.70 | 49.92 | a | 27.34 | b | 12.47 | 41.31 | |||||||||
1939 | 11.95 | 2.78 | a | 19.47 | 37.15 | 54.98 | 62.40 | 66.44 | 64.10 | 56.16 | b | 44.74 | 33.70 | 24.83 | a | 39.89 | ||||||||||
1940 | 4.48 | 15.16 | 18.48 | 37.72 | 49.69 | 58.33 | a | 65.69 | 61.95 | 57.62 | 46.05 | 22.66 | a | 14.86 | b | 37.72 | ||||||||||
1941 | 10.12 | a | 10.95 | 23.15 | 46.35 | 55.95 | a | 61.97 | 66.82 | 62.48 | 56.52 | 44.58 | 30.43 | a | 19.35 | 40.72 | ||||||||||
1942 | 14.40 | a | 11.27 | 29.53 | a | 45.88 | 48.84 | 59.62 | 62.47 | a | 63.23 | 51.32 | 43.10 | 25.82 | 7.63 | 38.59 | ||||||||||
1943 | 1.08 | 10.71 | 14.03 | 37.50 | 48.87 | 61.12 | a | 67.60 | 63.47 | 51.63 | 43.89 | 22.65 | 14.87 | 36.45 | ||||||||||||
1944 | 19.56 | 11.41 | a | 21.32 | 37.78 | 54.53 | 62.50 | 65.29 | 66.00 | 56.03 | 44.66 | 34.07 | 13.56 | 40.56 | ||||||||||||
1945 | 7.94 | 12.07 | 33.31 | 37.60 | 46.26 | 55.98 | 63.81 | 63.87 | 54.02 | 41.57 | a | 25.87 | 8.52 | 37.57 | ||||||||||||
1946 | 8.32 | 6.46 | 34.05 | 42.57 | 49.76 | 60.33 | 66.24 | 61.31 | 53.67 | 43.55 | 27.27 | 11.81 | 38.78 | |||||||||||||
1947 | 12.16 | 6.71 | 21.06 | 35.83 | 47.56 | 58.23 | 66.84 | 69.19 | 53.72 | 52.47 | 21.07 | 11.53 | 38.03 | |||||||||||||
1948 | 2.63 | a | 5.88 | 20.65 | 43.00 | 51.77 | 59.82 | 66.48 | 64.47 | 58.68 | 45.65 | 29.86 | a | 12.50 | 38.45 | |||||||||||
1949 | 10.12 | a | 6.91 | a | 20.70 | a | 43.03 | 52.66 | 66.22 | 68.32 | 67.05 | 52.55 | 45.63 | 30.25 | 12.70 | a | 39.68 | |||||||||
1950 | 1.25 | a | 10.64 | c | 17.00 | a | 28.95 | 48.10 | 61.40 | 61.79 | 59.23 | 56.07 | g | ----- | z | 23.71 | b | 6.28 | f | 34.67 | c | |||||
1951 | 2.00 | j | 17.29 | i | 21.57 | j | 38.36 | a | 56.26 | j | 58.71 | b | 64.13 | 59.30 | h | 50.33 | a | 42.50 | b | 20.78 | a | 9.30 | d | 40.59 | e | |
1952 | 6.72 | d | 19.12 | a | 20.64 | f | 45.42 | f | 51.48 | 63.59 | b | 65.57 | b | 62.56 | e | 55.21 | b | 41.59 | n | ----- | z | ----- | z | 46.32 | e | |
1953 | 8.20 | h | 11.21 | g | 26.64 | b | 35.52 | a | 50.21 | b | 62.85 | 66.62 | a | 66.92 | a | 55.65 | 50.21 | 33.17 | 14.15 | 46.19 | b | |||||
1954 | 3.06 | 23.73 | 20.56 | 37.92 | 46.71 | 62.62 | 65.61 | 62.84 | 54.27 | 42.15 | 32.57 | 18.63 | 39.22 | |||||||||||||
1955 | 8.21 | 7.91 | 15.89 | 47.13 | 56.68 | 63.32 | 70.92 | 69.88 | b | 54.62 | 45.14 | b | 20.08 | 5.77 | a | 38.79 | ||||||||||
1956 | 10.50 | 8.16 | 19.44 | 36.18 | 50.05 | 64.57 | 61.55 | 63.12 | n | 52.21 | a | 50.34 | 29.12 | 13.47 | 35.96 | a | ||||||||||
1957 | -0.28 | b | 11.04 | b | 20.60 | a | 40.60 | 51.63 | a | 60.13 | 69.08 | 64.52 | 52.88 | 43.55 | 28.75 | 16.66 | 38.26 | |||||||||
1958 | 14.95 | 10.55 | 28.35 | 42.50 | 52.73 | c | 55.58 | 64.27 | 63.92 | 56.22 | 45.79 | 29.17 | a | 4.21 | 39.02 | |||||||||||
1959 | -0.02 | 7.75 | 25.98 | a | 39.37 | 54.57 | a | 62.60 | 67.77 | a | 67.74 | 55.68 | 40.27 | a | 18.88 | 22.88 | a | 38.62 | ||||||||
1960 | 9.58 | 12.53 | 16.70 | a | 40.02 | 52.25 | a | 60.13 | 66.77 | a | 67.81 | d | 56.98 | 45.11 | 31.13 | 12.21 | 39.27 | |||||||||
1961 | 6.66 | 22.00 | c | 32.53 | 36.37 | 50.98 | 63.87 | 66.92 | 68.05 | a | 56.55 | b | 47.39 | 29.00 | 12.66 | c | 41.08 | |||||||||
1962 | 3.40 | 9.16 | 27.21 | 38.02 | a | 55.05 | b | 61.48 | b | 63.26 | 64.19 | 54.12 | a | 47.16 | 33.48 | 15.22 | a | 39.31 | ||||||||
1963 | 0.73 | a | 8.00 | a | 28.07 | a | 42.40 | 51.52 | 63.88 | 68.34 | 63.55 | 57.62 | 54.87 | 34.68 | 7.64 | b | 40.11 | |||||||||
1964 | 16.15 | 15.57 | 20.55 | 40.50 | a | 56.61 | 60.12 | b | 68.56 | 60.45 | 53.28 | 43.43 | a | 32.34 | a | 8.16 | b | 39.64 | ||||||||
1965 | 2.61 | 3.84 | 15.42 | 38.82 | 54.23 | a | 58.68 | 63.94 | 61.66 | b | 47.93 | 46.00 | a | 28.15 | c | 21.30 | c | 36.88 | ||||||||
1966 | -2.63 | 10.22 | a | 28.68 | 36.38 | 48.82 | a | 62.80 | 69.23 | 62.23 | 54.93 | 42.43 | a | 25.48 | b | 11.95 | a | 37.54 | ||||||||
1967 | 9.60 | 3.46 | 26.06 | 38.23 | 47.03 | 60.62 | a | 64.10 | 61.53 | 55.84 | a | 41.46 | c | 26.27 | 16.74 | 37.58 | ||||||||||
1968 | 9.00 | 10.78 | 33.24 | 41.50 | 50.06 | 60.25 | 65.77 | 63.26 | 55.89 | b | 47.05 | 29.43 | a | 12.08 | 39.86 | |||||||||||
1969 | 5.48 | 14.16 | 21.44 | 42.71 | b | 53.15 | 55.40 | 64.85 | 67.45 | 56.55 | 40.66 | 29.35 | 18.28 | a | 39.12 | |||||||||||
1970 | 4.03 | 11.72 | a | 20.07 | a | 38.57 | 49.73 | 64.33 | 69.60 | 66.24 | 56.03 | 45.71 | b | 27.12 | 10.71 | 38.65 | ||||||||||
1971 | 2.59 | o | 14.04 | a | 19.12 | f | 39.72 | 49.84 | 64.25 | 62.90 | 63.03 | 57.03 | a | 47.82 | 28.26 | a | 12.68 | 43.96 | b | |||||||
1972 | -0.16 | 6.33 | 20.31 | 35.97 | 57.29 | 61.18 | 64.02 | 64.00 | a | 52.26 | a | 40.91 | b | 26.85 | 7.85 | 36.40 | ||||||||||
1973 | 12.47 | 14.93 | 35.00 | 40.72 | 51.21 | ----- | z | ----- | z | 67.14 | f | 53.45 | a | 48.18 | 26.58 | 11.27 | 32.65 | c | ||||||||
1974 | 5.44 | 8.38 | 22.26 | 39.43 | 47.63 | 60.43 | a | 70.11 | 61.85 | 50.00 | 43.98 | 29.30 | ----- | z | 39.89 | a | ||||||||||
1975 | ----- | z | ----- | z | ----- | z | ----- | z | 55.15 | a | 60.85 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.00 | j | |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | 51.48 | a | 63.86 | a | 66.57 | a | 64.96 | f | 55.86 | a | 36.98 | 20.81 | a | 3.24 | 42.69 | e | ||
1977 | -2.34 | 17.08 | b | 32.32 | 46.03 | 60.81 | 61.32 | 66.87 | 58.68 | 53.42 | 44.23 | 27.15 | 10.73 | a | 39.69 | |||||||||||
1978 | 2.45 | c | 8.29 | 24.76 | 40.29 | a | 55.32 | 61.39 | b | 64.60 | 63.85 | 59.54 | c | 44.95 | 25.00 | a | ----- | z | 40.95 | a | ||||||
1979 | -2.48 | 4.63 | a | 23.63 | 35.57 | 47.36 | b | 59.25 | h | 65.93 | b | 61.06 | 56.16 | a | 41.32 | 26.53 | 20.34 | 34.55 | a | |||||||
1980 | 8.61 | 11.95 | 21.35 | 44.31 | a | 56.70 | a | 61.67 | a | 68.15 | 64.11 | 53.18 | 39.44 | 29.70 | b | 11.14 | b | 39.19 | ||||||||
1981 | 11.68 | ----- | z | 31.24 | ----- | z | ----- | z | ----- | z | 62.53 | o | 64.11 | 53.18 | b | 40.62 | c | 35.27 | 13.98 | 35.73 | e | |||||
1982 | -4.09 | c | 11.57 | a | 22.93 | b | 30.83 | o | 56.04 | c | 55.95 | 66.57 | a | 61.37 | d | 55.55 | 45.81 | d | 23.63 | c | 19.92 | 37.75 | a | |||
1983 | 13.48 | 20.44 | a | 29.86 | q | 37.45 | 48.27 | 60.45 | 68.95 | 68.06 | 56.43 | 43.78 | d | 29.52 | d | 0.09 | c | 40.63 | a | |||||||
1984 | 7.48 | a | 24.22 | 19.37 | a | 42.98 | ----- | z | 62.40 | 64.56 | 67.07 | b | 51.68 | m | 45.81 | m | 30.38 | r | 13.05 | a | 37.64 | d | ||||
1985 | 8.21 | b | 9.31 | a | 32.06 | e | 43.17 | c | 53.95 | l | 55.00 | e | 62.29 | 58.68 | a | 52.10 | a | 40.37 | a | 15.59 | c | -0.98 | 34.16 | a | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 6.46 | 10.89 | 23.80 | 39.24 | 51.73 | 61.01 | 66.17 | 63.70 | 54.47 | 43.86 | 27.37 | 12.39 | 38.55 | |||||||||||||
S.D. | 5.90 | 5.97 | 5.55 | 3.55 | 3.55 | 3.08 | 2.35 | 3.11 | 2.74 | 4.09 | 4.57 | 5.90 | 1.66 | |||||||||||||
SKEW | 0.10 | 0.16 | 0.19 | -0.00 | 0.11 | -0.23 | 0.14 | 0.92 | -0.48 | -0.01 | -0.24 | -0.09 | 0.01 | |||||||||||||
MAX | 19.56 | 24.98 | 35.00 | 47.13 | 60.81 | 68.38 | 71.63 | 75.66 | 59.54 | 54.87 | 35.27 | 24.83 | 43.09 | |||||||||||||
MIN | -4.09 | -5.03 | 10.67 | 28.95 | 43.98 | 55.00 | 61.55 | 57.65 | 47.93 | 31.58 | 15.59 | -0.98 | 34.83 | |||||||||||||
YRS | 64 | 63 | 62 | 64 | 65 | 66 | 66 | 63 | 65 | 64 | 66 | 63 | 45 |